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+ GNU GENERAL PUBLIC LICENSE
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+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
--- /dev/null
+ This file describes how to build and install less using
+the "configure" script. This only works on Unix systems.
+To install on other systems, read the README file.
+
+
+Basic Installation
+==================
+
+ These are generic installation instructions.
+
+ The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation. It uses
+those values to create a `Makefile' in each directory of the package.
+It may also create one or more `.h' files containing system-dependent
+definitions. Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, a file
+`config.cache' that saves the results of its tests to speed up
+reconfiguring, and a file `config.log' containing compiler output
+(useful mainly for debugging `configure').
+
+ If you need to do unusual things to compile the package, please try
+to figure out how `configure' could check whether to do them, and mail
+diffs or instructions to the address given in the `README' so they can
+be considered for the next release. If at some point `config.cache'
+contains results you don't want to keep, you may remove or edit it.
+
+ The file `configure.in' is used to create `configure' by a program
+called `autoconf'. You only need `configure.in' if you want to change
+it or regenerate `configure' using a newer version of `autoconf'.
+
+The simplest way to compile this package is:
+
+ 1. `cd' to the directory containing the package's source code and type
+ `./configure' to configure the package for your system. If you're
+ using `csh' on an old version of System V, you might need to type
+ `sh ./configure' instead to prevent `csh' from trying to execute
+ `configure' itself.
+
+ Running `configure' takes awhile. While running, it prints some
+ messages telling which features it is checking for.
+
+ 2. Type `make' to compile the package.
+
+ 3. Optionally, type `make check' to run any self-tests that come with
+ the package.
+
+ 4. Type `make install' to install the programs and any data files and
+ documentation.
+
+ 5. You can remove the program binaries and object files from the
+ source code directory by typing `make clean'. To also remove the
+ files that `configure' created (so you can compile the package for
+ a different kind of computer), type `make distclean'. There is
+ also a `make maintainer-clean' target, but that is intended mainly
+ for the package's developers. If you use it, you may have to get
+ all sorts of other programs in order to regenerate files that came
+ with the distribution.
+
+Compilers and Options
+=====================
+
+ Some systems require unusual options for compilation or linking that
+the `configure' script does not know about. You can give `configure'
+initial values for variables by setting them in the environment. Using
+a Bourne-compatible shell, you can do that on the command line like
+this:
+ CC=c89 CFLAGS=-O2 LIBS=-lposix ./configure
+
+Or on systems that have the `env' program, you can do it like this:
+ env CPPFLAGS=-I/usr/local/include LDFLAGS=-s ./configure
+
+Compiling For Multiple Architectures
+====================================
+
+ You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory. To do this, you must use a version of `make' that
+supports the `VPATH' variable, such as GNU `make'. `cd' to the
+directory where you want the object files and executables to go and run
+the `configure' script. `configure' automatically checks for the
+source code in the directory that `configure' is in and in `..'.
+
+ If you have to use a `make' that does not supports the `VPATH'
+variable, you have to compile the package for one architecture at a time
+in the source code directory. After you have installed the package for
+one architecture, use `make distclean' before reconfiguring for another
+architecture.
+
+Installation Names
+==================
+
+ By default, `make install' will install the package's files in
+`/usr/local/bin', `/usr/local/man', etc. You can specify an
+installation prefix other than `/usr/local' by giving `configure' the
+option `--prefix=PATH'.
+
+ You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files. If you
+give `configure' the option `--exec-prefix=PATH', the package will use
+PATH as the prefix for installing programs and libraries.
+Documentation and other data files will still use the regular prefix.
+
+ In addition, if you use an unusual directory layout you can give
+options like `--bindir=PATH' to specify different values for particular
+kinds of files. Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them.
+
+ If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+Optional Features
+=================
+
+ Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System). The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+ For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+Specifying the System Type
+==========================
+
+ There may be some features `configure' can not figure out
+automatically, but needs to determine by the type of host the package
+will run on. Usually `configure' can figure that out, but if it prints
+a message saying it can not guess the host type, give it the
+`--host=TYPE' option. TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name with three fields:
+ CPU-COMPANY-SYSTEM
+
+See the file `config.sub' for the possible values of each field. If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the host type.
+
+ If you are building compiler tools for cross-compiling, you can also
+use the `--target=TYPE' option to select the type of system they will
+produce code for and the `--build=TYPE' option to select the type of
+system on which you are compiling the package.
+
+Sharing Defaults
+================
+
+ If you want to set default values for `configure' scripts to share,
+you can create a site shell script called `config.site' that gives
+default values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists. Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Operation Controls
+==================
+
+ `configure' recognizes the following options to control how it
+operates.
+
+`--cache-file=FILE'
+ Use and save the results of the tests in FILE instead of
+ `./config.cache'. Set FILE to `/dev/null' to disable caching, for
+ debugging `configure'.
+
+`--help'
+ Print a summary of the options to `configure', and exit.
+
+`--quiet'
+`--silent'
+`-q'
+ Do not print messages saying which checks are being made.
+
+`--srcdir=DIR'
+ Look for the package's source code in directory DIR. Usually
+ `configure' can determine that directory automatically.
+
+`--version'
+ Print the version of Autoconf used to generate the `configure'
+ script, and exit.
+
+`configure' also accepts some other, not widely useful, options.
+
--- /dev/null
+ Less License
+ ------------
+
+Less
+Copyright (C) 1984-2015 Mark Nudelman
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+ notice in the documentation and/or other materials provided with
+ the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
--- /dev/null
+# Makefile for authoring less.
+
+EMAIL = bug-less@gnu.org
+HOMEPAGE = http://www.greenwoodsoftware.com/less
+SHELL = /bin/sh
+RCS = rcs
+NROFF = nroff -man
+
+srcdir = .
+
+SRC = \
+ main.c screen.c brac.c ch.c charset.c cmdbuf.c \
+ command.c cvt.c decode.c edit.c filename.c forwback.c \
+ help.c ifile.c input.c jump.c line.c linenum.c \
+ lsystem.c mark.c optfunc.c option.c opttbl.c os.c \
+ output.c pattern.c position.c prompt.c search.c signal.c \
+ tags.c ttyin.c version.c
+DISTFILES_W = \
+ defines.ds Makefile.dsb Makefile.dsg Makefile.dsu \
+ defines.o2 Makefile.o2e \
+ defines.o9 Makefile.o9c Makefile.o9u \
+ defines.wn Makefile.wnm Makefile.wnb \
+ configure
+UNICODE_FILES = \
+ compose.uni ubin.uni wide.uni
+DISTFILES = \
+ ${SRC} regexp.c regexp.h \
+ COPYING INSTALL LICENSE Makefile.in Makefile.aut NEWS README \
+ configure.ac lesskey.c lessecho.c scrsize.c \
+ charset.h cmd.h funcs.h lglob.h less.h lesskey.h option.h \
+ pckeys.h pattern.h position.h \
+ install.sh defines.h.in mkinstalldirs \
+ less.nro less.man lesskey.nro lesskey.man lessecho.nro lessecho.man \
+ less.hlp \
+ mkfuncs.awk mkhelp.c \
+ mkutable $(UNICODE_FILES) \
+ ${DISTFILES_W}
+
+all: help.c funcs.h $(UNICODE_FILES) ${srcdir}/configure
+
+release: .FORCE
+ ${MAKE} -f Makefile.aut tagall
+ ${MAKE} -f Makefile.aut all
+ ${MAKE} -f Makefile.aut clean
+ ${MAKE} -f Makefile.aut dist
+
+.FORCE:
+
+help.c: less.hlp mkhelp
+ -mv -f ${srcdir}/help.c ${srcdir}/help.c.old
+ rm -rf help.c
+ ./mkhelp < less.hlp > help.c
+ if cmp -s help.c help.c.old; then mv -f help.c.old help.c; fi
+
+mkhelp: mkhelp.c
+ ${CC} -o mkhelp mkhelp.c
+
+${srcdir}/configure: ${srcdir}/configure.ac \
+ ${srcdir}/Makefile.in
+ cd ${srcdir}; autoheader; autoconf
+
+funcs.h: ${SRC:%=${srcdir}/%}
+ -mv -f ${srcdir}/funcs.h ${srcdir}/funcs.h.old
+ awk -f ${srcdir}/mkfuncs.awk ${SRC:%=${srcdir}/%} >${srcdir}/funcs.h
+ if cmp -s funcs.h funcs.h.old; then mv -f funcs.h.old funcs.h; fi
+
+lint:
+ lint -I. ${CPPFLAGS} ${SRC}
+
+clean:
+ rm -f Makefile config.status config.log config.cache defines.h stamp-h \
+ README NEWS \
+ less.nro less.man lesskey.nro lesskey.man lessecho.nro lessecho.man
+
+distclean: clean
+realclean: clean
+
+REPLACE_VERSION = \
+ @REL=`sed -e '/char version/!d' -e 's/[^0-9.]*\([0-9.]*\).*/\1/' -e q ${srcdir}/version.c`; \
+ DT=`date '+%d %h %Y'`; \
+ echo "Stuffing version number $$REL into $@"; \
+ rm -f $@; \
+ sed \
+ -e "s;@@VERSION@@;$$REL;" \
+ -e "s;@@DATE@@;$$DT;" \
+ -e "s;@@EMAIL@@;${EMAIL};" \
+ -e "s;@@HOMEPAGE@@;${HOMEPAGE};" >$@
+
+${srcdir}/README: ${srcdir}/README.VER ${srcdir}/version.c
+ ${REPLACE_VERSION} ${srcdir}/README.VER
+${srcdir}/NEWS: ${srcdir}/NEWS.VER ${srcdir}/version.c
+ ${REPLACE_VERSION} ${srcdir}/NEWS.VER
+${srcdir}/less.nro: ${srcdir}/less.nro.VER ${srcdir}/version.c
+ ${REPLACE_VERSION} ${srcdir}/less.nro.VER
+${srcdir}/lesskey.nro: ${srcdir}/lesskey.nro.VER ${srcdir}/version.c
+ ${REPLACE_VERSION} ${srcdir}/lesskey.nro.VER
+${srcdir}/lessecho.nro: ${srcdir}/lessecho.nro.VER ${srcdir}/version.c
+ ${REPLACE_VERSION} ${srcdir}/lessecho.nro.VER
+${srcdir}/less.hlp: ${srcdir}/less.hlp.VER ${srcdir}/version.c
+ ${REPLACE_VERSION} ${srcdir}/less.hlp.VER
+
+${srcdir}/less.man: ${srcdir}/less.nro
+ ${NROFF} ${srcdir}/less.nro >${srcdir}/less.man
+${srcdir}/lesskey.man: ${srcdir}/lesskey.nro
+ ${NROFF} ${srcdir}/lesskey.nro >${srcdir}/lesskey.man
+${srcdir}/lessecho.man: ${srcdir}/lessecho.nro
+ ${NROFF} ${srcdir}/lessecho.nro >${srcdir}/lessecho.man
+
+compose.uni: unicode/UnicodeData.txt
+ ./mkutable -f2 Mn Me -- unicode/UnicodeData.txt > $@
+ubin.uni: unicode/UnicodeData.txt
+ ./mkutable -f2 Cc Cf Cs Co Zl Zp -- unicode/UnicodeData.txt > $@
+wide.uni: unicode/EastAsianWidth.txt
+ ./mkutable -f1 W -- unicode/EastAsianWidth.txt > $@
+
+distfiles: ${DISTFILES}
+
+dist: ${DISTFILES}
+ if [ ! -d ${srcdir}/release ]; then mkdir ${srcdir}/release; fi
+ @cd ${srcdir}; \
+ REL=`sed -e '/char version/!d' -e 's/[^0-9.]*\([0-9.]*\).*/less-\1/' -e q version.c`; \
+ rm -rf release/$$REL; mkdir release/$$REL; \
+ echo "Preparing $$REL"; \
+ rm -rf $$REL; mkdir $$REL; \
+ for file in ${DISTFILES}; do \
+ ./add_copyright $$file $$REL; \
+ done; \
+ cd $$REL; chmod -w *; chmod +w ${DISTFILES_W}; chmod +x configure; cd ..; \
+ echo "Creating release/$$REL/$$REL.tar.gz"; \
+ tar -cf - $$REL | gzip -c >release/$$REL/$$REL.tar.gz; \
+ echo "Signing release/$$REL/$$REL.tar.gz"; \
+ gpg --detach-sign release/$$REL/$$REL.tar.gz; \
+ echo "Creating release/$$REL/$$REL.zip"; \
+ zip -rq release/$$REL/$$REL.zip $$REL; \
+ rm -rf $$REL
+
+tagall:
+ @REL=`sed -e '/char version/!d' -e 's/[^0-9.]*\([0-9.]*\).*/v\1/' -e q ${srcdir}/version.c`; \
+ echo "tagging $$REL"; \
+ for f in ${srcdir}/RCS/*,v; do \
+ REV=`co -p $$f 2>&1 | sed -e '1d' -e '3,$$d' -e 's/revision //'`; \
+ ${RCS} -N$$REL:$$REV $$f; \
+ done
--- /dev/null
+# Makefile for less.
+# MS-DOS version (Borland C/C++ 4.02)
+
+#### Start of system configuration section. ####
+
+CC = bcc
+LIBDIR = \bc\lib
+
+CFLAGS = -A- -mm -O2 -w- -1- -2- -a -d -Z
+LDFLAGS = -mm
+LIBS =
+EXT = .EXE
+
+#### End of system configuration section. ####
+
+# This rule allows us to supply the necessary -D options
+# in addition to whatever the user asks for.
+.c.obj:
+ $(CC) -c -I. $(CPPFLAGS) $(CFLAGS) $<
+
+OBJ = \
+ main.obj screen.obj brac.obj ch.obj charset.obj cmdbuf.obj \
+ command.obj cvt.obj decode.obj edit.obj filename.obj forwback.obj \
+ help.obj ifile.obj input.obj jump.obj line.obj linenum.obj \
+ lsystem.obj mark.obj optfunc.obj option.obj opttbl.obj os.obj \
+ output.obj pattern.obj position.obj prompt.obj search.obj signal.obj \
+ tags.obj ttyin.obj version.obj
+
+all: less$(EXT) lesskey$(EXT)
+
+# This is really horrible, but the command line is too long for
+# MS-DOS if we try to link $(OBJ).
+less$(EXT): $(OBJ)
+ ren lesskey.obj lesskey.obo
+ $(CC) $(LDFLAGS) -e$@ *.obj $(LIBS)
+ ren lesskey.obo lesskey.obj
+
+lesskey$(EXT): lesskey.obj version.obj
+ $(CC) $(LDFLAGS) -e$@ lesskey.obj version.obj $(LIBS)
+
+defines.h: defines.ds
+ -del defines.h
+ -copy defines.ds defines.h
+
+$(OBJ): less.h defines.h
+
+clean:
+ -del *.obj
+ -del less.exe
+ -del lesskey.exe
+
--- /dev/null
+# Makefile for less under DJGPP v2.0 or later.
+
+#### Start of system configuration section. ####
+
+srcdir = .
+VPATH = .
+
+CC = gcc
+INSTALL = ginstall -c
+INSTALL_PROGRAM = ginstall
+INSTALL_DATA = ginstall -m 644
+AWK = gawk
+
+CFLAGS = -O2 -g
+CFLAGS_COMPILE_ONLY = -c
+#LDFLAGS = -s
+LDFLAGS = -g
+O=o
+
+LIBS =
+prefix = /dev/env/DJDIR
+exec_prefix = ${prefix}
+
+bindir = ${exec_prefix}/bin
+sysconfdir = ${prefix}/etc
+mandir = ${prefix}/man
+manext = 1
+
+#### End of system configuration section. ####
+
+# This rule allows us to supply the necessary -D options
+# in addition to whatever the user asks for.
+.c.o:
+ ${CC} -I. ${CFLAGS_COMPILE_ONLY} -DBINDIR=\"${bindir}\" -DSYSDIR=\"${sysconfdir}\" ${CPPFLAGS} ${CFLAGS} $<
+
+OBJ = \
+ main.${O} screen.${O} brac.${O} ch.${O} charset.${O} cmdbuf.${O} \
+ command.${O} cvt.${O} decode.${O} edit.${O} filename.${O} forwback.${O} \
+ help.${O} ifile.${O} input.${O} jump.${O} line.${O} linenum.${O} \
+ lsystem.${O} mark.${O} optfunc.${O} option.${O} opttbl.${O} os.${O} \
+ output.${O} pattern.${O} position.${O} prompt.${O} search.${O} signal.${O} \
+ tags.${O} ttyin.${O} version.${O}
+
+all: less lesskey lessecho
+
+less: ${OBJ}
+ ${CC} ${LDFLAGS} -o $@ ${OBJ} ${LIBS}
+
+lesskey: lesskey.${O} version.${O}
+ ${CC} ${LDFLAGS} -o $@ lesskey.${O} version.${O}
+
+lessecho: lessecho.${O} version.${O}
+ ${CC} ${LDFLAGS} -o $@ lessecho.${O} version.${O}
+
+defines.h: defines.ds
+ command.com /c copy $< $@
+
+${OBJ}: ${srcdir}/less.h defines.h ${srcdir}/funcs.h
+
+install: all ${srcdir}/less.man ${srcdir}/lesskey.man
+ ${INSTALL_PROGRAM} less.exe ${bindir}/less.exe
+ ${INSTALL_PROGRAM} lesskey.exe ${bindir}/lesskey.exe
+ ${INSTALL_PROGRAM} lessecho.exe ${bindir}/lessecho.exe
+ ${INSTALL_DATA} ${srcdir}/less.man ${mandir}/man${manext}/less.${manext}
+ ${INSTALL_DATA} ${srcdir}/lesskey.man ${mandir}/man${manext}/lesskey.${manext}
+
+info:
+install-info:
+dvi:
+check:
+installcheck:
+
+TAGS:
+ etags *.c *.h
+
+newfuncs:
+ command.com /c if exist funcs.h del funcs.h
+ ${AWK} -f mkfuncs.awk ${OBJ:.${O}=.c} > funcs.h
+
+clean:
+ command.com /c for %f in (*.${O} less lesskey lessecho *.exe) do if exist %f del %f
+
+mostlyclean: clean
+
+distclean: clean
+ command.com /c if not exist Makefile.dsg ren Makefile Makefile.dsg
+ command.com /c if not exist defines.ds ren defines.h defines.ds
+ command.com /c for %f in (Makefile defines.h) do if exist %f del %f
+
+realclean: distclean
+ command.com /c if exist TAGS del TAGS
+
--- /dev/null
+# Makefile for less.
+# MS-DOS version
+
+#### Start of system configuration section. ####
+
+CC = cl
+# Change the following directories to match your installation.
+LIBDIR = c:\msvc\lib
+INCDIR = c:\msvc\include
+
+# CFLAGS are compile-time options and LDFLAGS are link-time options. They are
+# customized for MSVC 1.0 (MSC 8.0). If you have a different version of the
+# compiler, you may need to change some of the options to their equivalents.
+# -Ot optimize for speed
+# -AL large memory model
+# -Za ANSI C conformance
+# -nologo suppress MSVC banners
+# -onerror:noexe no .EXE file if link errors occur
+CFLAGS = -Ot -AL -Za -nologo
+LDFLAGS = -onerror:noexe -nologo
+LIBS = $(LIBDIR)\llibce.lib $(LIBDIR)\graphics.lib
+
+#### End of system configuration section. ####
+
+# This rule allows us to supply the necessary -D options
+# in addition to whatever the user asks for.
+.c.obj:
+ $(CC) -c -I. -I$(INCDIR) $(CPPFLAGS) $(CFLAGS) $<
+
+OBJ = \
+ main.obj screen.obj brac.obj ch.obj charset.obj cmdbuf.obj \
+ command.obj cvt.obj decode.obj edit.obj filename.obj forwback.obj \
+ help.obj ifile.obj input.obj jump.obj line.obj linenum.obj \
+ lsystem.obj mark.obj optfunc.obj option.obj opttbl.obj os.obj \
+ output.obj pattern.obj position.obj prompt.obj search.obj signal.obj \
+ tags.obj ttyin.obj version.obj
+
+all: less lesskey
+
+# This is really horrible, but the command line is too long for
+# MS-DOS if we try to link $(OBJ).
+less: $(OBJ)
+ -if exist lesskey.obj del lesskey.obj
+ $(CC) $(LDFLAGS) -o $@ *.obj $(LIBS)
+
+lesskey: lesskey.obj version.obj
+ $(CC) $(LDFLAGS) -o $@ lesskey.obj version.obj $(LIBS)
+
+defines.h: defines.ds
+ -del defines.h
+ -copy defines.ds defines.h
+
+$(OBJ): less.h defines.h
+
+clean:
+ -del *.obj
+ -del less.exe
+ -del lesskey.exe
+
--- /dev/null
+# Makefile for less.
+
+#### Start of system configuration section. ####
+
+srcdir = @srcdir@
+VPATH = @srcdir@
+
+CC = @CC@
+INSTALL = @INSTALL@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_DATA = @INSTALL_DATA@
+
+CFLAGS = @CFLAGS@
+CFLAGS_COMPILE_ONLY = -c
+LDFLAGS = @LDFLAGS@
+CPPFLAGS = @CPPFLAGS@
+EXEEXT = @EXEEXT@
+O=o
+
+LIBS = @LIBS@
+
+prefix = @prefix@
+exec_prefix = @exec_prefix@
+
+# Where the installed binary goes.
+bindir = @bindir@
+binprefix =
+
+sysconfdir = @sysconfdir@
+datarootdir = @datarootdir@
+
+mandir = @mandir@
+manext = 1
+manprefix =
+DESTDIR =
+
+#### End of system configuration section. ####
+
+SHELL = /bin/sh
+
+# This rule allows us to supply the necessary -D options
+# in addition to whatever the user asks for.
+.c.o:
+ ${CC} -I. ${CFLAGS_COMPILE_ONLY} -DBINDIR=\"${bindir}\" -DSYSDIR=\"${sysconfdir}\" ${CPPFLAGS} ${CFLAGS} $<
+
+OBJ = \
+ main.${O} screen.${O} brac.${O} ch.${O} charset.${O} cmdbuf.${O} \
+ command.${O} cvt.${O} decode.${O} edit.${O} filename.${O} forwback.${O} \
+ help.${O} ifile.${O} input.${O} jump.${O} line.${O} linenum.${O} \
+ lsystem.${O} mark.${O} optfunc.${O} option.${O} opttbl.${O} os.${O} \
+ output.${O} pattern.${O} position.${O} prompt.${O} search.${O} signal.${O} \
+ tags.${O} ttyin.${O} version.${O} @REGEX_O@
+
+all: less$(EXEEXT) lesskey$(EXEEXT) lessecho$(EXEEXT)
+
+less$(EXEEXT): ${OBJ}
+ ${CC} ${LDFLAGS} -o $@ ${OBJ} ${LIBS}
+
+lesskey$(EXEEXT): lesskey.${O} version.${O}
+ ${CC} ${LDFLAGS} -o $@ lesskey.${O} version.${O}
+
+lessecho$(EXEEXT): lessecho.${O} version.${O}
+ ${CC} ${LDFLAGS} -o $@ lessecho.${O} version.${O}
+
+${OBJ}: ${srcdir}/less.h ${srcdir}/funcs.h defines.h
+
+install: all ${srcdir}/less.nro ${srcdir}/lesskey.nro ${srcdir}/lessecho.nro installdirs
+ ${INSTALL_PROGRAM} less$(EXEEXT) ${DESTDIR}${bindir}/${binprefix}less$(EXEEXT)
+ ${INSTALL_PROGRAM} lesskey$(EXEEXT) ${DESTDIR}${bindir}/${binprefix}lesskey$(EXEEXT)
+ ${INSTALL_PROGRAM} lessecho$(EXEEXT) ${DESTDIR}${bindir}/${binprefix}lessecho$(EXEEXT)
+ ${INSTALL_DATA} ${srcdir}/less.nro ${DESTDIR}${mandir}/man${manext}/${manprefix}less.${manext}
+ ${INSTALL_DATA} ${srcdir}/lesskey.nro ${DESTDIR}${mandir}/man${manext}/${manprefix}lesskey.${manext}
+ ${INSTALL_DATA} ${srcdir}/lessecho.nro ${DESTDIR}${mandir}/man${manext}/${manprefix}lessecho.${manext}
+
+install-strip:
+ ${MAKE} INSTALL_PROGRAM='${INSTALL_PROGRAM} -s' install
+
+installdirs: mkinstalldirs
+ ${srcdir}/mkinstalldirs ${DESTDIR}${bindir} ${DESTDIR}${mandir}/man${manext}
+
+uninstall:
+ rm -f ${DESTDIR}${bindir}/${binprefix}less$(EXEEXT)
+ rm -f ${DESTDIR}${bindir}/${binprefix}lesskey$(EXEEXT)
+ rm -f ${DESTDIR}${bindir}/${binprefix}lessecho$(EXEEXT)
+ rm -f ${DESTDIR}${mandir}/man${manext}/${manprefix}less.${manext}
+ rm -f ${DESTDIR}${mandir}/man${manext}/${manprefix}lesskey.${manext}
+ rm -f ${DESTDIR}${mandir}/man${manext}/${manprefix}lessecho.${manext}
+
+info:
+install-info:
+dvi:
+check:
+installcheck:
+
+TAGS:
+ cd ${srcdir} && etags *.c *.h
+
+# config.status might not change defines.h
+# Don't rerun config.status if we just configured (so there's no stamp-h).
+defines.h: stamp-h
+stamp-h: defines.h.in config.status
+ test ! -f stamp-h || CONFIG_FILES= CONFIG_HEADERS=defines.h ./config.status
+ touch stamp-h
+Makefile: ${srcdir}/Makefile.in config.status
+ CONFIG_FILES=Makefile CONFIG_HEADERS= ./config.status
+config.status: ${srcdir}/configure
+ ./config.status --recheck
+
+${srcdir}/configure: ${srcdir}/configure.ac
+ cd ${srcdir}; autoheader; autoconf
+
+clean:
+ rm -f *.${O} core less$(EXEEXT) lesskey$(EXEEXT) lessecho$(EXEEXT)
+
+mostlyclean: clean
+
+distclean: clean
+ rm -f Makefile config.status config.log config.cache defines.h stamp-h
+
+realclean: distclean
+ rm -f TAGS
+
--- /dev/null
+# Makefile for less.
+# OS/2 version, for emx+gcc compiler
+
+#### Start of system configuration section. ####
+
+CC = gcc -Zomf
+CFLAGS = -I. -O2 -Wall
+LDFLAGS = -s -Zcrtdll
+LIBS = -ltermcap
+O = obj
+
+#### End of system configuration section. ####
+
+.SUFFIXES: .c .${O}
+
+# This rule allows us to supply the necessary -D options
+# in addition to whatever the user asks for.
+.c.${O}:
+ ${CC} -c ${CPPFLAGS} ${CFLAGS} $<
+
+OBJ = \
+ main.${O} screen.${O} brac.${O} ch.${O} charset.${O} cmdbuf.${O} \
+ command.${O} cvt.${O} decode.${O} edit.${O} filename.${O} forwback.${O} \
+ help.${O} ifile.${O} input.${O} jump.${O} line.${O} linenum.${O} \
+ lsystem.${O} mark.${O} optfunc.${O} option.${O} opttbl.${O} os.${O} \
+ output.${O} pattern.${O} position.${O} prompt.${O} search.${O} signal.${O} \
+ tags.${O} ttyin.${O} version.${O} regexp.${O}
+
+all: less.exe lesskey.exe scrsize.exe
+
+less.exe: ${OBJ}
+ ${CC} ${OBJ} -o $@ ${LDFLAGS} ${LIBS}
+
+lesskey.exe: lesskey.${O} version.${O}
+ ${CC} lesskey.${O} version.${O} -o $@ ${LDFLAGS}
+
+scrsize.exe: scrsize.c
+ ${CC} ${CFLAGS} -D__ST_MT_ERRNO__ -s -Zmtd -lX11 $<
+
+${OBJ}: defines.h less.h
+
+defines.h: defines.o2
+ copy defines.o2 defines.h
--- /dev/null
+# Makefile for less.
+# OS-9 version for Microware C 3.2.
+
+#### Start of system configuration section. ####
+
+CC = cc
+CPPFLAGS = -D_OSK_MWC32 -DDEBUG=0 -DSTRCSPN
+CFLAGS = -k=0 -v=.
+CFLAGS_COMPILE_ONLY = -r
+LDFLAGS = -igm=8
+LIBS = -l=/dd/lib/termlib.l
+O = r
+
+
+#### End of system configuration section. ####
+
+.SUFFIXES: .c .${O}
+
+# This rule allows us to supply the necessary -D options
+# in addition to whatever the user asks for.
+
+.c.${O}:
+ ${CC} ${CFLAGS_COMPILE_ONLY} ${CPPFLAGS} ${CFLAGS} $<
+
+OBJ = \
+ main.${O} screen.${O} brac.${O} ch.${O} charset.${O} cmdbuf.${O} \
+ command.${O} cvt.${O} decode.${O} edit.${O} filename.${O} forwback.${O} \
+ help.${O} ifile.${O} input.${O} jump.${O} line.${O} linenum.${O} \
+ lsystem.${O} mark.${O} optfunc.${O} option.${O} opttbl.${O} os.${O} \
+ output.${O} pattern.${O} position.${O} prompt.${O} search.${O} signal.${O} \
+ tags.${O} ttyin.${O} version.${O} regexp.${O}
+
+all: less lessecho lesskey
+
+less: ${OBJ}
+ ${CC} ${OBJ} -f=$@ ${LDFLAGS} ${LIBS}
+
+lesskey: lesskey.${O} version.${O}
+ ${CC} lesskey.${O} version.${O} -f=$@ ${LDFLAGS}
+
+lessecho: lessecho.${O} version.${O}
+ ${CC} lessecho.${O} version.${O} -f=$@ ${LDFLAGS}
+
+${OBJ}: defines.h less.h
+
+defines.h: defines.o9
+ copy defines.o9 defines.h -rf
--- /dev/null
+# Makefile for less.
+# OS-9 version for Ultra C.
+
+#### Start of system configuration section. ####
+
+CC = cc
+CPPFLAGS =
+CFLAGS = -v=.
+CFLAGS_COMPILE_ONLY = -eas
+LDFLAGS = -olM=24k
+LIBS = -ltermlib.l -lsys_clib.l -lunix.l
+O = r
+
+
+#### End of system configuration section. ####
+
+.SUFFIXES: .c .${O}
+
+# This rule allows us to supply the necessary -D options
+# in addition to whatever the user asks for.
+.c.${O}:
+ ${CC} ${CFLAGS_COMPILE_ONLY} ${CPPFLAGS} ${CFLAGS} $<
+
+OBJ = \
+ main.${O} screen.${O} brac.${O} ch.${O} charset.${O} cmdbuf.${O} \
+ command.${O} cvt.${O} decode.${O} edit.${O} filename.${O} forwback.${O} \
+ help.${O} ifile.${O} input.${O} jump.${O} line.${O} linenum.${O} \
+ lsystem.${O} mark.${O} optfunc.${O} option.${O} opttbl.${O} os.${O} \
+ output.${O} pattern.${O} position.${O} prompt.${O} search.${O} signal.${O} \
+ tags.${O} ttyin.${O} version.${O} regexp.${O}
+
+all: less lesskey
+
+less: ${OBJ}
+ ${CC} ${OBJ} -f=$@ ${LDFLAGS} ${LIBS}
+
+lesskey: lesskey.${O} version.${O}
+ ${CC} lesskey.${O} version.${O} -f=$@ ${LDFLAGS}
+
+${OBJ}: defines.h less.h
+
+defines.h: defines.o9
+ copy defines.o9 defines.h -rf
--- /dev/null
+# Makefile for less.
+# Windows version
+# Bolarnd C++ 5.5.1 free command line tools
+
+#### Start of system configuration section. ####
+#
+# Borland's make knows its own location in the
+# filesystem.
+#
+
+CC = bcc32
+LIBDIR = $(MAKEDIR)\..\lib
+
+CFLAGS = -O2 -w-pro -TWC -P-c -v- -d -f- -ff- -vi
+LDFLAGS = -Tpe -v- -ap -c -x -V4.0 -GF:AGGRESSIVE
+LD = ilink32
+LIBS = ${LIBDIR}\import32.lib ${LIBDIR}\cw32.lib
+
+#### End of system configuration section. ####
+
+#
+# This rule allows us to supply the necessary -D options
+# in addition to whatever the user asks for.
+#
+.c.obj:
+ ${CC} -c -I. ${CPPFLAGS} ${CFLAGS} $<
+
+OBJ = \
+ main.obj screen.obj brac.obj ch.obj charset.obj cmdbuf.obj \
+ command.obj cvt.obj decode.obj edit.obj filename.obj forwback.obj \
+ help.obj ifile.obj input.obj jump.obj line.obj linenum.obj \
+ lsystem.obj mark.obj optfunc.obj option.obj opttbl.obj os.obj \
+ output.obj pattern.obj position.obj prompt.obj search.obj signal.obj \
+ tags.obj ttyin.obj version.obj regexp.obj
+
+all: less lesskey lessecho
+
+#
+# This is really horrible, but the command line is too long for
+# MS-DOS if we try to link ${OBJ}.
+#
+less: ${OBJ}
+ ${LD} ${LDFLAGS} ${LIBDIR}\c0x32.obj $**, $@,,${LIBS}
+
+lesskey: lesskey.obj version.obj
+ ${LD} ${LDFLAGS} ${LIBDIR}\c0x32.obj $**, $@,,${LIBS}
+
+lessecho: lessecho.obj version.obj
+ ${LD} ${LDFLAGS} ${LIBDIR}\c0x32.obj $**, $@,,${LIBS}
+
+defines.h: defines.wn
+ -del defines.h
+ -copy defines.wn defines.h
+
+${OBJ}: less.h defines.h funcs.h cmd.h
+
+clean:
+ -del *.obj
+ -del *.il?
+ -del *.tds
+ -del defines.h
+
+spotless: clean
+ -del less.exe
+ -del lesskey.exe
+ -del lessecho.exe
+
+realclean: spotless
+
+distclean: spotless
+
--- /dev/null
+# Makefile for less.
+# Windows 32 Visual C++ version
+
+#### Start of system configuration section. ####
+
+CC = cl
+
+# Normal flags
+CFLAGS = /nologo /MD /W3 /EHsc /O2 /I "." /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /c
+LDFLAGS = /nologo /subsystem:console /incremental:no /machine:I386
+
+# Debugging flags
+#CFLAGS = /nologo /MDd /W3 /GX /Od /Gm /Zi /I "." /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /c
+#LDFLAGS = /nologo /subsystem:console /incremental:yes /debug /machine:I386
+
+LD = link
+LIBS = user32.lib
+
+#### End of system configuration section. ####
+
+# This rule allows us to supply the necessary -D options
+# in addition to whatever the user asks for.
+.c.obj:
+ $(CC) $(CFLAGS) $<
+
+OBJ = \
+ main.obj screen.obj brac.obj ch.obj charset.obj cmdbuf.obj \
+ command.obj cvt.obj decode.obj edit.obj filename.obj forwback.obj \
+ help.obj ifile.obj input.obj jump.obj line.obj linenum.obj \
+ lsystem.obj mark.obj optfunc.obj option.obj opttbl.obj os.obj \
+ output.obj pattern.obj position.obj prompt.obj search.obj signal.obj \
+ tags.obj ttyin.obj version.obj regexp.obj
+
+all: less.exe lesskey.exe
+
+# This is really horrible, but the command line is too long for
+# MS-DOS if we try to link ${OBJ}.
+less.exe: $(OBJ)
+ -del lesskey.obj
+ $(LD) $(LDFLAGS) *.obj $(LIBS) /out:$@
+
+lesskey.exe: lesskey.obj version.obj
+ $(LD) $(LDFLAGS) lesskey.obj version.obj $(LIBS) /out:$@
+
+defines.h: defines.wn
+ -del defines.h
+ -copy defines.wn defines.h
+
+$(OBJ): less.h defines.h funcs.h cmd.h
+
+clean:
+ -del *.obj
+ -del less.exe
+ -del lesskey.exe
+
+
--- /dev/null
+
+ NEWS about less
+
+======================================================================
+
+ For the latest news about less, see the "less" Web page:
+ http://www.greenwoodsoftware.com/less
+ You can also download the latest version of less from there.
+
+ To report bugs, suggestions or comments, send email to bug-less@gnu.org
+
+======================================================================
+
+ Major changes between "less" versions 458 and 481
+
+* Don't overwrite history file; just append to it.
+
+* New command ESC-G goes to end of currently buffered data in a pipe.
+
+* Disable history feature when compiled with LESSHISTFILE set to "-".
+
+* In more-compatible mode, make the -p option apply to every file opened,
+ not just the first one.
+
+* In more-compatible mode, change the -e option to work like -E, not -EF.
+
+* Treat multiple CRs before LF are like one CR (all the CRs are hidden).
+
+* Allow "extra" string in lesskey file to append to a multi-char command
+ (like a search pattern), without executing the command.
+
+* Ignore -u/-U setting while viewing help file, so that
+ underline and bold chars are displayed correctly.
+
+* Improve detection of "binary" files in UTF-8 mode.
+
+* Fix bug with ++ commands.
+
+* Fix bug where prompt was sometimes not displayed with +G.
+
+* Fix possible memory corruption
+
+* Fix bugs and improve performance in ampersand filtering.
+
+* Automate construction of Unicode tables from Unicode database.
+
+* Allow %% escape sequence in LESSOPEN variable.
+
+======================================================================
+
+ Major changes between "less" versions 451 and 458
+
+* Allow backslash escaping of metacharacters in LESS environment variable
+ after the --use-backslash option.
+
+* Don't quit if syntax errors are found in command line options.
+
+* Increase sizes of some internal buffers.
+
+* Fix configure bug with --with-regex=none.
+
+* Fix crash with "stty rows 0".
+
+* Fix Win32 attribute display bug.
+
+* Fix display bug when using up/down arrow on the command line.
+
+======================================================================
+
+ Major changes between "less" versions 444 and 451
+
+* Add ESC-F command to keep reading data until a pattern is found.
+
+* Use exit code of LESSOPEN script if LESSOPEN starts with "||".
+
+* When up/down arrow is used on the command line immediately after
+ typing text, the next command starting with that text is found.
+
+* Add support for GNU regex.
+
+* Add configure option --with-regex=none and fix compile errors
+ when compiling with no regex library.
+
+* Fix bugs handling SGR sequences in Win32.
+
+* Fix possible crashes caused by malformed LESSOPEN or
+ LESSCLOSE variables.
+
+* Fix bug highlighting text which is discontiguous in the file
+ due to backspace processing.
+
+* Fix bug in displaying status column when scrolling backwards
+ with -J and -S in effect.
+
+======================================================================
+
+ Major changes between "less" versions 443 and 444
+
+* Fix bug in unget handling that can cause strange effects on the
+ command line.
+
+* Remove vestiges of obsolete -l option that can cause a crash.
+
+======================================================================
+
+ Major changes between "less" versions 436 and 443
+
+* Change search behavior such that when a search is given an explicit
+ pattern, the entire displayed screen is included in the search and
+ not just the portion after the target line.
+
+* Add -A option to change search behavior to the old way: only
+ the portion of the screen after the target line is searched.
+
+* Add %F formatting to prompt strings, replaced by the last component
+ of the input file.
+
+* Control-G while editing a command exits the command.
+
+* Less now exits with status 2 if control-C is pressed and -K is in effect.
+
+* Fix "ungetc overflow" when passing long commands via the -p option.
+
+* Fix bug in using line filtering via the & command
+ in combination with -i and -I.
+
+* Fix bug in handling negative arguments to the -j option.
+
+* Fix bug in handling %t in prompt strings.
+
+* Improve handling of long option names.
+
+* Improve percentage calculation for very large files.
+
+======================================================================
+
+ Major changes between "less" versions 429 and 436
+
+* Don't pass "-" to non-pipe LESSOPEN unless it starts with "-".
+
+* Allow a fraction as the argument to the -# (--shift) option.
+
+* Fix highlight bug when underlined/overstruck text matches at end of line.
+
+* Fix non-regex searches with ctrl-R.
+
+======================================================================
+
+ Major changes between "less" versions 424 and 429
+
+* LESSOPEN pipe will now be used on standard input, if the LESSOPEN
+ environment variable begins with "|-".
+
+* The -D option with one number now means use the normal background color.
+
+* Don't change permissions on history file if it is not a regular file.
+
+* Fix non-ANSI-compliant code that caused problems with some compilers.
+
+* Fix binary file detection in UTF-8 mode.
+
+* Fix display problems with long lines on "ignaw" terminals.
+
+* Fix problem interrupting the line number calculation for initial prompt.
+
+* Fix SGR emulation when dealing with multiple attributes (eg. bold+underline).
+
+* Fix highlight bug when searching for underlined/overstruck text.
+
+======================================================================
+
+ Major changes between "less" versions 418 and 424
+
+* New "&" command allows filtering of lines based on a pattern.
+
+* Status column now displays a search match, even if the matched
+ string is scrolled off screen because -S is in effect.
+
+* Improve behavior of -F option.
+
+* Allow CSI character (0x9B) to work in UTF-8 mode.
+
+* Output carriage return at startup in case terminal doesn't default
+ to column 1.
+
+* Fix bug in '' (quote, quote) command after G command.
+
+======================================================================
+
+ Major changes between "less" versions 416 and 418
+
+* Color escape sequences are now supported in WIN32 build.
+
+* Makefile now uses EXEEXT feature of autoconf.
+
+* Fix search bug when using -R and text contains ANSI color escape sequences.
+
+* Fix crash when using -r with UTF-8 text containing 0x9B bytes.
+
+* Fix display bug when using ' command to move less than one page forward.
+
+* Update GPL to version 3.
+
+======================================================================
+
+ Major changes between "less" versions 409 and 416
+
+* New --follow-name option makes F command follow the name of a file
+ rather than the file descriptor if an open file is renamed.
+
+* Make searching with -i/-I work correctly with non-ASCII text.
+
+* Fix DJGPP build.
+
+======================================================================
+
+ Major changes between "less" versions 406 and 409
+
+* Support CSI escape sequences, like SGR escape sequences.
+
+* Fix bug which caused screen to fail to repaint when window is resized.
+
+* Fix bug in using -i and -I flags with non-ASCII text.
+
+* Fix configure bug on systems which don't support langinfo.h.
+
+* Fix crash when searching text containing certain invalid UTF-8 sequences.
+
+======================================================================
+
+ Major changes between "less" versions 394 and 406
+
+* Allow decimal point in number for % (percent) command.
+
+* Allow decimal point in number for -j option (fraction of screen height).
+
+* Make n command fetch previous pattern from history file on first search.
+
+* Don't rewrite history file if it has not changed.
+
+* Don't move to bottom of screen on first page.
+
+* Don't output extraneous newlines, so copy & pasting lines from the
+ output works better.
+
+* The -c option has been made identical with the -C option.
+
+* Allow "/dev/null" as synomym for "-" in LESSHISTFILE to indicate
+ that no history file should be used.
+
+* Search can now find text which follows a null byte, if the PCRE
+ library is used, or if no-regex searching (ctrl-R) is used.
+
+* Better compatibility with POSIX more specification.
+
+* Make -f work for directories.
+
+* Make "t" cmd traverse tags in the correct order.
+
+* Allow a few binary characters in the input file before warning
+ that the file is binary.
+
+* Don't warn that file is binary if it merely contains ANSI color sequences
+ and -R is in effect.
+
+* Update Unicode character tables.
+
+* Support DESTDIR in Makefile.
+
+* Fix bug when filename contains certain shell metacharacters such as "$".
+
+* Fix bug when resizing the window while waiting for input from a pipe.
+
+* Fix configure bugs.
+
+======================================================================
+
+ Major changes between "less" versions 382 and 394
+
+* Add history file to save search and shell command history between
+ invocations of less.
+
+* Improve behavior of history list for search and shell commands.
+
+* Add -K (or --quit-on-intr) option to make less exit immediately on ctrl-C.
+
+* Improve handling of UTF-8 files and commands, including better
+ line wrapping and handling double-width chars.
+
+* Added LESSUTFBINFMT environment variable to control display of
+ non-printable characters in a UTF-8 file.
+
+* Add --with-secure option to configure, to make it easier to
+ build a secure version of less.
+
+* Show search matches in the status column even if search highlights
+ are disabled via the -G option or the ESC-u command.
+
+* Improve performance when the file contains very long lines.
+
+* Add "windows" charset.
+
+* Add man page for lessecho.
+
+* Add support for erase2 character, treated same as erase.
+
+* Use ASCII lowercase/uppercase logic when operating on the command line.
+
+* Update makefile for Borland C++ 5.5.1.
+
+* Fix bug in calculating number of pages for %D prompt.
+
+* Fix bug in handling tag file error.
+
+* Fix obscure bug if input file is deleted while viewing help.
+
+* Fix bug handling filenames which include square brackets.
+
+* Fix possible buffer overflow in "global" tag search.
+
+* Fix possible buffer overflow in usage of LESSOPEN and LESSCLOSE.
+
+* Fix buffer overflow in reverse search.
+
+======================================================================
+
+ Major changes between "less" versions 381 and 382
+
+* Removed some old copyrighted code.
+ This probably breaks OS/9 support.
+
+======================================================================
+
+ Major changes between "less" versions 378 and 381
+
+* New -L option to disable LESSOPEN processing.
+
+* Further support for large (64 bit) file addressing.
+ Large file support is now set up by the configure script.
+
+* Use autoconf 2.54.
+ Replace configure.in, acconfig.h, defines.h.top with configure.ac.
+
+* Overstriking underscore with underscore is now bold or underlined
+ depending on context.
+
+* Use only 7 spaces for line numbers in -N mode, if possible.
+
+* Fix some bugs in handling overstriking in UTF-8 files.
+
+* Fix some nroff issues in the man page.
+
+======================================================================
+
+ Major changes between "less" versions 376 and 378
+
+* Bug fixes:
+ Default buffer space is now 64K as documented.
+ Search highlighting works properly when used with -R.
+ Windows version works properly when input file contains carriage returns.
+ Clean up some compiler warnings.
+
+======================================================================
+
+ Major changes between "less" versions 358 and 376
+
+* -x option can now specify multiple variable-width tab stops.
+
+* -X option no longer disables keypad initialization.
+ New option --no-keypad disables keypad initialization.
+
+* New commands t and T step through multiple tag matches.
+ Added support for "global(1)" tags
+ (see http://www.gnu.org/software/global/global.html).
+
+* New prompt style set by option -Pw defines the message printed
+ while waiting for data in the F command.
+
+* System-wide lesskey file now defaults to sysless in etc directory
+ instead of .sysless in bin directory.
+ Use "configure --sysconfdir=..." to change it.
+ (For backwards compatibility, .sysless in bin is still recognized.)
+
+* Pressing RightArrow or LeftArrow while entering a number now shifts
+ the display N columns rather than editing the number itself.
+
+* Status column (enabled with -J) now shows search results.
+
+* Windows version sets window title.
+
+* Default LESSCHARSET for MS-DOS versions is now "dos".
+
+* Searching works better with ANSI (SGR) escape sequences.
+ ANSI color escape sequences are now supported in the MS-DOS (DJGPP) version.
+
+* Improved performance in reading very large pipes.
+
+* Eliminated some dependencies on file offets being 32 bits.
+
+* Fixed problems when viewing files with very long lines.
+
+* Fixed overstriking in UTF-8 mode, and overstriking tabs.
+
+* Improved horizontal shifting of text using -R option with ANSI color.
+
+* Improved handling of filenames containing shell metacharacters.
+
+* Some fixes for EBCDIC systems.
+
+* Some fixes for OS/2 systems.
+
+======================================================================
+
+ Major changes between "less" versions 354 and 358
+
+* Add -J (--status-column) option to display a status column.
+
+* Add -# (--shift) option to set default horizontal shift distance.
+ Default horizontal shift distance is now one-half screen width.
+
+* Horizontal shifting does not shift line numbers if -N is in effect.
+
+* Horizontal shifting acts as though -S were set, to avoid confusion.
+
+======================================================================
+
+
+ Major changes between "less" versions 352 and 354
+
+* Allow space after numeric-valued command line options.
+
+* Fix problem with configuring terminal libraries on some systems.
+
+* Add support for PCRE regular expression library.
+
+* Add --with-regex option to configure to allow manually selecting
+ a regular expression library.
+
+* Fix bug compiling with SECURE = 1.
+
+======================================================================
+
+
+ Major changes between "less" versions 346 and 352
+
+* Enable UTF-8 if "UTF-8" appears in locale-related environment variables.
+
+* Add --with-editor option to configure script.
+
+* The -M prompt and = message now show the top and bottom line number.
+
+* Fix bug in running the editor on a file whose name contains quotes, etc.
+
+* Fix bug in horizontal scrolling of long lines.
+
+* Fix bug in doing :d on a file which contains marks.
+
+* Fix bug causing cleared lines to sometimes be filled with standout,
+ bold, underline, etc. on certain terminals.
+
+* Fixes for MS-DOS (DJGPP) version.
+
+======================================================================
+
+
+ Major changes between "less" versions 340 and 346
+
+* The UTF-8 character set is now supported.
+
+* The default character set is now latin1 rather than ascii.
+
+* New option -R (--RAW-CONTROL-CHARS) is like -r but handles
+ long (wrapped) lines correctly, as long as the input contains only
+ normal text and ANSI color escape sequences.
+
+* New option -F (--quit-if-one-screen) quits if the text fits on
+ the first screen.
+
+* The -w option now highlights the target line of a g or p command.
+
+* A system-wide lesskey file is supported (LESSKEY_SYSTEM).
+
+* New escape for prompt strings: %c is replaced by column number.
+
+* New escape for prompt strings: %P is replaced by percentage into
+ file, based on line number rather than byte offset.
+
+* HOME and END keys now jump to beginning of file or end of file.
+
+======================================================================
+
+
+ Major changes between "less" versions 337 and 340
+
+* Command line options for less may now be given in either the old
+ single-letter form, or a new long name form (--option-name).
+ See the less man page or "less --help" for the list of long option names.
+
+* Command line options for lesskey may now be given in a new long name
+ form. See the lesskey man page for the list of long option names.
+
+* New command -- toggles an option using the long option name.
+
+* New command __ queries an option using the long option name.
+
+* The old -- command is renamed as -!.
+
+* If a ^P is entered between the dash and the option letter of the -
+ command, the message describing the new setting is suppressed.
+
+* Lesskey files may now contain \k escape sequences to represent the
+ "special" keys (arrows, PAGE-UP/PAGE-DOWN, HOME, END, INSERT, DELETE).
+
+* New command :d removes the current file from the list of files.
+
+* New option -~ (like -w before version 335)
+ suppresses tildes after end-of-file.
+
+* Less is now released under the GNU General Public License.
+
+======================================================================
+
+
+ Major changes between "less" versions 335 and 337
+
+* Fixed bugs in "make install".
+
+======================================================================
+
+
+ Major changes between "less" versions 332 and 335
+
+* The old -w flag (suppress tildes after end-of-file) has been removed.
+
+* New -w flag highlights the first new line after a forward-screen.
+
+* New -W flag highlights the first new line after any forward movement.
+
+* Window resize works even if LINES and/or COLUMNS environment
+ variables are incorrect.
+
+* New percent escapes for prompt strings:
+ %d is replaced by the page number, and
+ %D is replaced by the number of pages in the file.
+
+* Added charsets "iso8859" and "ebcdic".
+
+* In Windows version, uses HOMEDRIVE and HOMEPATH if HOME is not defined.
+
+* Fixed some bugs causing incorrect display on DOS/Windows.
+
+======================================================================
+
+
+ Major changes between "less" versions 330 and 332
+
+* Filenames from the command line are entered into the command history,
+ so UPARROW/DOWNARROW can be used to retrieve them from the :e command.
+
+* Now works correctly on Windows when using a scrolling terminal
+ window (buffer larger than display window).
+
+* On Windows, now restores the console screen on exit.
+ Use -X to get the old behavior.
+
+* Fixed bug on Windows when CAPS-LOCK or NUM-LOCK is pressed.
+
+* Fixed bug on Windows when piping output of an interactive program.
+
+* Fixed bug in tags file processing when tags file has DOS-style
+ line terminators (CR/LF).
+
+* Fixed compilation problem on OS/2.
+
+======================================================================
+
+
+ Major changes between "less" versions 321 and 330
+
+* Now supports filenames containing spaces (in double quotes).
+ New option -" can be used to change the quoting characters.
+
+* In filename completion, a slash is appended to a directory name.
+ If the environment variable LESSSEPARATOR is set, the value of
+ that variable, rather than a slash, is appended.
+
+* LeftArrow and RightArrow are same as ESC-[ and ESC-].
+
+* Added commands ESC-( and ESC-), same as ESC-[ and ESC-].
+
+* A "quit" command defined in a lesskey file may now have an "extra"
+ string, which is used to return an exit code from less when it quits.
+
+* New environment variables LESSMETACHARS and LESSMETAESCAPE provide
+ more control over how less interfaces to the shell.
+
+* Ported to Microsoft Visual C compiler for Windows.
+
+* Ported to DJGPP compiler for MS-DOS.
+
+* Bug fixes.
+
+======================================================================
+
+
+ Major changes between "less" versions 291 and 321
+
+* Command line at bottom of screen now scrolls, so it can be longer
+ than the screen width.
+
+* New commands ESC-] and ESC-[ scroll the display horizontally.
+
+* New command ESC-SPACE scrolls forward a full screen, even if it
+ hits end-of-file.
+
+* Alternate modifiers for search commands: ^N is same as !,
+ ^F is same as @, and ^E is same as *.
+
+* New modifier for search commands: ^K means highlight the matches
+ currently on-screen, but don't move to the first match.
+
+* New modifier for search commands: ^R means don't use regular
+ expressions in the search.
+
+* Environment variable LESSKEY gives name of default lesskey file.
+
+* Environment variable LESSSECURE will force less to run in
+ "secure" mode.
+
+* Command line argument "--" signals that the rest of the arguments
+ are files (not option flags).
+
+* Help file (less.hlp) is no longer installed. Help text is now
+ embedded in the less executable itself.
+
+* Added -Ph to change the prompt for the help text.
+ Added -Ps to change the default short prompt (same as plain -P).
+
+* Ported to the Borland C compiler for MS-DOS.
+
+* Ported to Windows 95 & Windows NT.
+
+* Ported to OS-9.
+
+* Ported to GNU Hurd.
+
+======================================================================
+
+
+ Major changes between "less" versions 290 and 291
+
+* Less environment variables can be specified in lesskey files.
+
+* Fixed MS-DOS build.
+
+======================================================================
+
+
+ Major changes between "less" versions 278 and 290
+
+* Accepts GNU-style options "--help" and "--version".
+
+* OS/2 version looks for less.ini in $HOME before $INIT and $PATH.
+
+* Bug fixes
+
+======================================================================
+
+
+ Major changes between "less" versions 252 and 278
+
+* A LESSOPEN preprocessor may now pipe the converted file data to less,
+ rather than writing it to a temporary file.
+
+* Search pattern highlighting has been fixed. It now highlights
+ reliably, even if a string is split across two screen lines,
+ contains TABs, etc.
+
+* The -F flag (which suppress search highlighting) has been changed
+ to -G. A new flag, -g, changes search highlighting to highlight
+ only the string found by the last search command, instead of all
+ strings which match the last search command.
+
+* New flag -I acts like -i, but ignores case even if the search
+ pattern contains uppercase letters.
+
+* Less now checks for the environment variable VISUAL before EDITOR.
+
+* Ported to OS/2.
+
+======================================================================
+
+
+ Major changes between "less" versions 237 and 252
+
+* Changes in line-editing keys:
+ The literal key is now ^V or ^A rather than \ (backslash).
+ Filename completion commands (TAB and ^L) are disabled
+ when typing a search pattern.
+
+* Line-editing command keys can be redefined using lesskey.
+
+* Lesskey with no input file defaults to $HOME/.lesskey
+ rather than standard input.
+
+* New option -V displays version number of less.
+
+* New option -V displays version number of lesskey.
+
+* Help file less.hlp is now installed by default in /usr/local/share
+ rather than /usr/local/lib.
+
+
+======================================================================
+
+
+ Major changes between "less" versions 170 and 237
+
+* By popular demand, text which matches the current search pattern
+ is highlighted. New -F flag disables this feature.
+
+* Henry Spencer's regexp.c is now included, for systems which do not
+ have a regular expression library.
+ regexp.c is Copyright (c) 1986 by University of Toronto.
+
+* New line-editing keys, including command history (arrow keys) and
+ filename completion (TAB).
+
+* Input preprocessor allows modification of input files (e.g. uncompress)
+ via LESSOPEN/LESSCLOSE environment variables.
+
+* New -X flag disables sending termcap "ti" and "te" (initialize and
+ deinitialize) strings to the terminal.
+
+* Changing -i from within less now correctly affects a subsequent
+ repeated search.
+
+* Searching for underlined or overstruck text now works when the -u
+ flag is in effect, rather than the -i flag.
+
+* Use setlocale (LANG and LC_CTYPE environment variables) to determine
+ the character set if LESSCHARSET/LESSCHARDEF are not set.
+
+* The default format for displaying binary characters is now standout
+ (reverse video) rather than blinking. This can still be changed by
+ setting the LESSBINFMT environment variable.
+
+* Use autoconf installation technology.
+
+* Ported to MS-DOS.
+
+ ********************************
+ Things that may surprise you
+ ********************************
+
+* When you enter text at the bottom of the screen (search string,
+ filename, etc.), some keys act different than previously.
+ Specifically, \ (backslash), ESC, TAB, BACKTAB, and control-L
+ now have line editing functions.
+
+* Some previous unofficial versions of less were able to display
+ compressed files. The new LESSOPEN/LESSCLOSE feature now provides
+ this functionality in a different way.
+
+* Some previous unofficial versions of less provided a -Z flag to
+ set the number of lines of text to retain between full screen scrolls.
+ The -z-n flag (that is, -z with a negative number) provides this
+ functionality.
+
+
+======================================================================
+
+
+ Major changes between "less" versions 123 and 170
+
+* New option -j allows target lines to be positioned anywhere on screen.
+
+* New option -S truncates displayed line at the screen width,
+ rather than wrapping onto the next line.
+
+* New option -y limits amount of forward scroll.
+
+* New option -T specifies a "tags" file.
+
+* Non-printable, non-control characters are displayed in octal.
+ Such characters, as well as control characters, are displayed
+ in blinking mode.
+
+* New command -+ sets an option to its default.
+* New command -- sets an option to the opposite of its default.
+
+* Lesskey file may have a string appended to a key's action,
+ which acts as though typed in after the command.
+
+* New commands ESC-^F and ESC-^B match arbitrary types of brackets.
+
+* New command F monitors a growing file (like "tail -f").
+
+* New command | pipes a section of the input file into a shell command.
+
+* New command :x directly jumps to a file in the command line list.
+
+* Search commands have been enhanced and reorganized:
+ n Repeat search, same direction.
+ N Repeat search, opposite direction.
+ ESC-/ Search forward thru file boundaries
+ ESC-? Search backward thru file boundaries
+ ESC-n Repeat search thru file boundaries, same direction.
+ ESC-N Repeat search thru file boundaries, opposite direction.
+ Special character * causes search to search thru file boundaries.
+ Special character @ causes search to begin at start/end of file list.
+
+* Examining a new file adds it to the command line list.
+ A list of files, or an expression which matches more than one file,
+ may be examined; all of them are added to the command line list.
+
+* Environment variables LESSCHARSET and LESSCHARDEF can define
+ a non-ASCII character set.
+
+* Partial support for MSDOS, including options -R for repainting screen
+ on quit, -v/-V to select video mode, and -W to change window size.
+
+
+======================================================================
+
+
+ Major changes between "less" versions 97 and 123
+
+* New option (-N) causes line numbers to be displayed in the
+ text of the file (like vi "set nu").
+
+* New option (-?) prints help message immediately.
+
+* New option (-r) displays "raw" control characters, without
+ mapping them to ^X notation.
+
+* New option (-f) forces less to open non-regular files
+ (directories, etc).
+
+* New option (-k) can be used to specify lesskey files by name.
+
+* New option (-y) can be used to set a forward scroll limit
+ (like -h sets a backward scroll limit).
+
+* File marks (set by the m command) are now preserved when a new
+ file is edited. The ' command can thus be used to switch files.
+
+* New command ESC-/ searches all files (on the command line)
+ for a pattern.
+
+* New command ESC-n repeats previous search, spanning files.
+
+* The N command has been changed to repeat the previous search
+ in the reverse direction. The old N command is still available
+ via :n.
+
+* New command ESC-N repeats previous search in the reverse
+ direction and spanning files.
+
+* 8 bit characters are now supported. A new option (-g) can be
+ used to strip off the eighth bit (the previous behavior).
+
+* Options which take a following string (like -t) may now
+ optionally have a space between the option letter and the string.
+
+* Six new commands { } ( ) [ and ] can be used to match
+ brackets of specific types, similar to vi % command.
+
+* New commands z and w move forward/backward one window and
+ simultaneously set the window size.
+
+* Prompt string expansion now has %L for line number of the last
+ line in the file, and %E for the name of the editor.
+ Also, % escapes which refer to a line (b=bottom, t=top, etc.)
+ can use j for the jump target line.
+
+* New environment variable LESSEDIT can be used to tailor the
+ command string passed to the editor by the v command.
+
+* Examining a file which was previously examined will return
+ to the same position in the file.
+
+* A "%" is expanded to the current filename and a "#" to the
+ previous filename, in both shell commands and the E command.
+ (Previously % worked only in shell commands and # worked
+ only in the E command.)
+
+* New command ":ta" is equivalent to "-t".
+
+* New command "s" is equivalent to "-l".
+
+* The - command may be followed by "+X" to revert to the default
+ for option X, or "-X" to get the opposite of the default.
+
+* Lesskey files may now include characters after the action as
+ extra input to be parsed after the action; for example:
+ "toggle-option X" to toggle a specific option X.
+
+
+
+
+
--- /dev/null
+
+ Less, version 481
+
+ This is the distribution of less, version 481, released 31 Aug 2015.
+ This program is part of the GNU project (http://www.gnu.org).
+
+ This program is free software. You may redistribute it and/or
+ modify it under the terms of either:
+
+ 1. The GNU General Public License, as published by the Free
+ Software Foundation; either version 3, or (at your option) any
+ later version. A copy of this license is in the file COPYING.
+ or
+ 2. The Less License, in the file LICENSE.
+
+ Please report any problems to bug-less@gnu.org.
+ See http://www.greenwoodsoftware.com/less for the latest info.
+
+=========================================================================
+
+This is the distribution of "less", a paginator similar to "more" or "pg".
+
+The formatted manual page is in less.man.
+The manual page nroff source is in less.nro.
+Major changes made since the last posted version are in NEWS.
+
+=======================================================================
+INSTALLATION (Unix systems only):
+
+1. Move the distributed source to its own directory and unpack it,
+ if you have not already done so.
+
+2. Type "sh configure".
+ This will generate a Makefile and a defines.h.
+ Warning: if you have a GNU sed, make sure it is version 2.05 or later.
+
+ The file INSTALL describes the usage of the configure program in
+ general. In addition, these options to configure are supported:
+
+ --with-editor=program
+ Specifies the default editor program used by the "v" command.
+ The default is "vi".
+
+ --with-regex=lib
+ Specifies the regular expression library used by less for pattern
+ matching. The default is "auto", which means the configure program
+ finds a regular expression library automatically. Other values are:
+ gnu Use the GNU regex library.
+ pcre Use the PCRE library.
+ posix Use the POSIX-compatible regcomp.
+ regcmp Use the regcmp library.
+ re_comp Use the re_comp library.
+ regcomp Use the V8-compatible regcomp.
+ regcomp-local Use Henry Spencer's V8-compatible regcomp
+ (source is supplied with less).
+ none No regular expressions, only simple string matching.
+ --with-secure
+ Builds a "secure" version of less, with some features disabled
+ to prevent users from viewing other files, accessing shell
+ commands, etc.
+
+
+3. It is a good idea to look over the generated Makefile and defines.h
+ and make sure they look ok. If you know of any peculiarities of
+ your system that configure might not have detected, you may fix the
+ Makefile now. Take particular notice of the list of "terminal"
+ libraries in the LIBS definition in the Makefile; these may need
+ to be edited. The terminal libraries will be some subset of
+ -lncurses -lcurses -ltermcap -ltermlib
+
+ If you wish, you may edit defines.h to remove some optional features.
+ If you choose not to include some features in your version, you may
+ wish to edit the manual page "less.nro" and the help page "less.hlp"
+ to remove the descriptions of the features which you are removing.
+ If you edit less.hlp, you should run "make -f Makefile.aut help.c".
+
+4. Type "make" and watch the fun.
+
+5. If the make succeeds, it will generate the programs "less",
+ "lesskey" and "lessecho" in your current directory. Test the
+ generated programs.
+
+6. When satisfied that it works, if you wish to install it
+ in a public place, type "make install".
+
+ The default install destinations are:
+ Executables (less, lesskey, lessecho) in /usr/local/bin
+ Documentation (less.nro, lesskey.nro) in /usr/local/man/man1
+ If you want to install any of these files elsewhere, define
+ bindir and/or mandir to the appropriate directories.
+
+If you have any problems building or running "less", suggestions,
+complaints, etc., you may mail to bug-less@gnu.org.
+
+Note to hackers: comments noting possible improvements are enclosed
+in double curly brackets {{ like this }}.
+
+(Note that the above note was originally written at a time when
+"hackers" most commonly meant "enthusiastic and dedicated computer
+programmers", not "persons who attempt to circumvent computer security".)
+
+
+
+=======================================================================
+INSTALLATION (MS-DOS systems only,
+ with Microsoft C, Borland C, or DJGPP)
+
+1. Move the distributed source to its own directory.
+ Depending on your compiler, you may need to convert the source
+ to have CR-LF rather than LF as line terminators.
+
+2. If you are using Microsoft C, rename MAKEFILE.DSU to MAKEFILE.
+ If you are using Borland C, rename MAKEFILE.DSB to MAKEFILE.
+ If you are using DJGPP, rename MAKEFILE.DSG to MAKEFILE.
+
+3. Look at MAKEFILE to make sure that the definitions for CC and LIBDIR
+ are correct. CC should be the name of your C compiler and
+ LIBDIR should be the directory where the C libraries reside (for
+ Microsoft C only). If these definitions need to be changed, you can
+ either modify the definitions directly in MAKEFILE, or set your
+ environment variables CC and/or LIBDIR to override the definitions
+ in MAKEFILE.
+
+4. If you wish, you may edit DEFINES.DS to remove some optional features.
+ If you choose not to include some features in your version, you may
+ wish to edit the manual page LESS.MAN and the help page HELP.C
+ to remove the descriptions of the features which you are removing.
+
+5. Run your "make" program and watch the fun.
+ If your "make" requires a flag to import environment variables,
+ you should use that flag.
+ If your compiler runs out of memory, try running "make -n >cmds.bat"
+ and then run cmds.bat.
+
+6. If the make succeeds, it will generate the programs "LESS.EXE" and
+ "LESSKEY.EXE" in your current directory. Test the generated programs.
+
+7. When satisfied that it works, you may wish to install LESS.EXE and
+ LESSKEY.EXE in a directory which is included in your PATH.
+
+
+
+=======================================================================
+INSTALLATION (Windows-95, Windows-98 and Windows-NT systems only,
+ with Borland C or Microsoft Visual C++)
+
+1. Move the distributed source to its own directory.
+
+2. If you are using Borland C, rename Makefile.wnb to Makefile.
+ If you are using Microsoft Visual C++, rename Makefile.wnm to Makefile.
+
+3. Check the Makefile to make sure the definitions look ok.
+
+4. If you wish, you may edit defines.wn to remove some optional features.
+ If you choose not to include some features in your version, you may
+ wish to edit the manual page less.man and the help page help.c
+ to remove the descriptions of the features which you are removing.
+
+5. Type "make" and watch the fun.
+
+6. If the make succeeds, it will generate the programs "less.exe" and
+ "lesskey.exe" in your current directory. Test the generated programs.
+
+7. When satisfied that it works, if you wish to install it
+ in a public place, type "make install".
+ See step 6 of the Unix installation instructions for details
+ on how to change the default installation directories.
+
+
+
+=======================================================================
+INSTALLATION (OS/2 systems only,
+ with EMX C)
+
+1. Move the distributed source to its own directory.
+
+2. Rename Makefile.o2e to Makefile.
+
+3. Check the Makefile to make sure the definitions look ok.
+
+4. If you wish, you may edit defines.o2 to remove some optional features.
+ If you choose not to include some features in your version, you may
+ wish to edit the manual page less.man and the help page help.c
+ to remove the descriptions of the features which you are removing.
+
+5. Type "make" and watch the fun.
+
+6. If the make succeeds, it will generate the programs "less.exe" and
+ "lesskey.exe" in your current directory. Test the generated programs.
+
+7. Make sure you have the emx runtime installed. You need the emx DLLs
+ emx.dll and emxlibcs.dll and also the termcap database, termcap.dat.
+ Make sure you have termcap.dat either in the default location or
+ somewhere in a directory listed in the PATH or INIT environment
+ variables.
+
+8. When satisfied that it works, you may wish to install less.exe,
+ lesskey.exe and scrsize.exe in a directory which is included in
+ your PATH. scrsize.exe is required only if you use a terminal
+ emulator such as xterm or rxvt.
+
+
+
+=======================================================================
+INSTALLATION (OS-9 systems only,
+ with Microware C or Ultra C)
+
+1. Move the distributed source to its own directory.
+
+2. If you are using Microware C, rename Makefile.o9c to Makefile.
+ If you are using Ultra C, rename Makefile.o9u to Makefile.
+
+3. Check the Makefile to make sure the definitions look ok.
+
+4. If you wish, you may edit defines.o9 to remove some optional features.
+ If you choose not to include some features in your version, you may
+ wish to edit the manual page less.man and the help page help.c
+ to remove the descriptions of the features which you are removing.
+
+5. Type "dmake" and watch the fun.
+ The standard OS-9 "make" will probably not work. If you don't
+ have dmake, you can get a copy from os9archive.rtsi.com.
+
+6. If the make succeeds, it will generate the programs "less" and
+ "lesskey" in your current directory. Test the generated programs.
+
+7. When satisfied that it works, if you wish to install it
+ in a public place, type "dmake install".
+ See step 6 of the Unix installation instructions for details
+ on how to change the default installation directories.
+
+=======================================================================
+ACKNOWLEDGMENTS:
+ Some versions of the less distribution are packaged using
+ Info-ZIP's compression utility.
+ Info-ZIP's software is free and can be obtained as source
+ code or executables from various anonymous-ftp sites,
+ including ftp.uu.net:/pub/archiving/zip.
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines to perform bracket matching functions.
+ */
+
+#include "less.h"
+#include "position.h"
+
+/*
+ * Try to match the n-th open bracket
+ * which appears in the top displayed line (forwdir),
+ * or the n-th close bracket
+ * which appears in the bottom displayed line (!forwdir).
+ * The characters which serve as "open bracket" and
+ * "close bracket" are given.
+ */
+ public void
+match_brac(obrac, cbrac, forwdir, n)
+ register int obrac;
+ register int cbrac;
+ int forwdir;
+ int n;
+{
+ register int c;
+ register int nest;
+ POSITION pos;
+ int (*chget)();
+
+ extern int ch_forw_get(), ch_back_get();
+
+ /*
+ * Seek to the line containing the open bracket.
+ * This is either the top or bottom line on the screen,
+ * depending on the type of bracket.
+ */
+ pos = position((forwdir) ? TOP : BOTTOM);
+ if (pos == NULL_POSITION || ch_seek(pos))
+ {
+ if (forwdir)
+ error("Nothing in top line", NULL_PARG);
+ else
+ error("Nothing in bottom line", NULL_PARG);
+ return;
+ }
+
+ /*
+ * Look thru the line to find the open bracket to match.
+ */
+ do
+ {
+ if ((c = ch_forw_get()) == '\n' || c == EOI)
+ {
+ if (forwdir)
+ error("No bracket in top line", NULL_PARG);
+ else
+ error("No bracket in bottom line", NULL_PARG);
+ return;
+ }
+ } while (c != obrac || --n > 0);
+
+ /*
+ * Position the file just "after" the open bracket
+ * (in the direction in which we will be searching).
+ * If searching forward, we are already after the bracket.
+ * If searching backward, skip back over the open bracket.
+ */
+ if (!forwdir)
+ (void) ch_back_get();
+
+ /*
+ * Search the file for the matching bracket.
+ */
+ chget = (forwdir) ? ch_forw_get : ch_back_get;
+ nest = 0;
+ while ((c = (*chget)()) != EOI)
+ {
+ if (c == obrac)
+ nest++;
+ else if (c == cbrac && --nest < 0)
+ {
+ /*
+ * Found the matching bracket.
+ * If searching backward, put it on the top line.
+ * If searching forward, put it on the bottom line.
+ */
+ jump_line_loc(ch_tell(), forwdir ? -1 : 1);
+ return;
+ }
+ }
+ error("No matching bracket", NULL_PARG);
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Low level character input from the input file.
+ * We use these special purpose routines which optimize moving
+ * both forward and backward from the current read pointer.
+ */
+
+#include "less.h"
+#if MSDOS_COMPILER==WIN32C
+#include <errno.h>
+#include <windows.h>
+#endif
+
+#if HAVE_STAT_INO
+#include <sys/stat.h>
+extern dev_t curr_dev;
+extern ino_t curr_ino;
+#endif
+
+typedef POSITION BLOCKNUM;
+
+public int ignore_eoi;
+
+/*
+ * Pool of buffers holding the most recently used blocks of the input file.
+ * The buffer pool is kept as a doubly-linked circular list,
+ * in order from most- to least-recently used.
+ * The circular list is anchored by the file state "thisfile".
+ */
+struct bufnode {
+ struct bufnode *next, *prev;
+ struct bufnode *hnext, *hprev;
+};
+
+#define LBUFSIZE 8192
+struct buf {
+ struct bufnode node;
+ BLOCKNUM block;
+ unsigned int datasize;
+ unsigned char data[LBUFSIZE];
+};
+#define bufnode_buf(bn) ((struct buf *) bn)
+
+/*
+ * The file state is maintained in a filestate structure.
+ * A pointer to the filestate is kept in the ifile structure.
+ */
+#define BUFHASH_SIZE 1024
+struct filestate {
+ struct bufnode buflist;
+ struct bufnode hashtbl[BUFHASH_SIZE];
+ int file;
+ int flags;
+ POSITION fpos;
+ int nbufs;
+ BLOCKNUM block;
+ unsigned int offset;
+ POSITION fsize;
+};
+
+#define ch_bufhead thisfile->buflist.next
+#define ch_buftail thisfile->buflist.prev
+#define ch_nbufs thisfile->nbufs
+#define ch_block thisfile->block
+#define ch_offset thisfile->offset
+#define ch_fpos thisfile->fpos
+#define ch_fsize thisfile->fsize
+#define ch_flags thisfile->flags
+#define ch_file thisfile->file
+
+#define END_OF_CHAIN (&thisfile->buflist)
+#define END_OF_HCHAIN(h) (&thisfile->hashtbl[h])
+#define BUFHASH(blk) ((blk) & (BUFHASH_SIZE-1))
+
+/*
+ * Macros to manipulate the list of buffers in thisfile->buflist.
+ */
+#define FOR_BUFS(bn) \
+ for (bn = ch_bufhead; bn != END_OF_CHAIN; bn = bn->next)
+
+#define BUF_RM(bn) \
+ (bn)->next->prev = (bn)->prev; \
+ (bn)->prev->next = (bn)->next;
+
+#define BUF_INS_HEAD(bn) \
+ (bn)->next = ch_bufhead; \
+ (bn)->prev = END_OF_CHAIN; \
+ ch_bufhead->prev = (bn); \
+ ch_bufhead = (bn);
+
+#define BUF_INS_TAIL(bn) \
+ (bn)->next = END_OF_CHAIN; \
+ (bn)->prev = ch_buftail; \
+ ch_buftail->next = (bn); \
+ ch_buftail = (bn);
+
+/*
+ * Macros to manipulate the list of buffers in thisfile->hashtbl[n].
+ */
+#define FOR_BUFS_IN_CHAIN(h,bn) \
+ for (bn = thisfile->hashtbl[h].hnext; \
+ bn != END_OF_HCHAIN(h); bn = bn->hnext)
+
+#define BUF_HASH_RM(bn) \
+ (bn)->hnext->hprev = (bn)->hprev; \
+ (bn)->hprev->hnext = (bn)->hnext;
+
+#define BUF_HASH_INS(bn,h) \
+ (bn)->hnext = thisfile->hashtbl[h].hnext; \
+ (bn)->hprev = END_OF_HCHAIN(h); \
+ thisfile->hashtbl[h].hnext->hprev = (bn); \
+ thisfile->hashtbl[h].hnext = (bn);
+
+static struct filestate *thisfile;
+static int ch_ungotchar = -1;
+static int maxbufs = -1;
+
+extern int autobuf;
+extern int sigs;
+extern int secure;
+extern int screen_trashed;
+extern int follow_mode;
+extern constant char helpdata[];
+extern constant int size_helpdata;
+extern IFILE curr_ifile;
+#if LOGFILE
+extern int logfile;
+extern char *namelogfile;
+#endif
+
+static int ch_addbuf();
+
+
+/*
+ * Get the character pointed to by the read pointer.
+ */
+ int
+ch_get()
+{
+ register struct buf *bp;
+ register struct bufnode *bn;
+ register int n;
+ register int slept;
+ register int h;
+ POSITION pos;
+ POSITION len;
+
+ if (thisfile == NULL)
+ return (EOI);
+
+ /*
+ * Quick check for the common case where
+ * the desired char is in the head buffer.
+ */
+ if (ch_bufhead != END_OF_CHAIN)
+ {
+ bp = bufnode_buf(ch_bufhead);
+ if (ch_block == bp->block && ch_offset < bp->datasize)
+ return bp->data[ch_offset];
+ }
+
+ slept = FALSE;
+
+ /*
+ * Look for a buffer holding the desired block.
+ */
+ h = BUFHASH(ch_block);
+ FOR_BUFS_IN_CHAIN(h, bn)
+ {
+ bp = bufnode_buf(bn);
+ if (bp->block == ch_block)
+ {
+ if (ch_offset >= bp->datasize)
+ /*
+ * Need more data in this buffer.
+ */
+ break;
+ goto found;
+ }
+ }
+ if (bn == END_OF_HCHAIN(h))
+ {
+ /*
+ * Block is not in a buffer.
+ * Take the least recently used buffer
+ * and read the desired block into it.
+ * If the LRU buffer has data in it,
+ * then maybe allocate a new buffer.
+ */
+ if (ch_buftail == END_OF_CHAIN ||
+ bufnode_buf(ch_buftail)->block != -1)
+ {
+ /*
+ * There is no empty buffer to use.
+ * Allocate a new buffer if:
+ * 1. We can't seek on this file and -b is not in effect; or
+ * 2. We haven't allocated the max buffers for this file yet.
+ */
+ if ((autobuf && !(ch_flags & CH_CANSEEK)) ||
+ (maxbufs < 0 || ch_nbufs < maxbufs))
+ if (ch_addbuf())
+ /*
+ * Allocation failed: turn off autobuf.
+ */
+ autobuf = OPT_OFF;
+ }
+ bn = ch_buftail;
+ bp = bufnode_buf(bn);
+ BUF_HASH_RM(bn); /* Remove from old hash chain. */
+ bp->block = ch_block;
+ bp->datasize = 0;
+ BUF_HASH_INS(bn, h); /* Insert into new hash chain. */
+ }
+
+ read_more:
+ pos = (ch_block * LBUFSIZE) + bp->datasize;
+ if ((len = ch_length()) != NULL_POSITION && pos >= len)
+ /*
+ * At end of file.
+ */
+ return (EOI);
+
+ if (pos != ch_fpos)
+ {
+ /*
+ * Not at the correct position: must seek.
+ * If input is a pipe, we're in trouble (can't seek on a pipe).
+ * Some data has been lost: just return "?".
+ */
+ if (!(ch_flags & CH_CANSEEK))
+ return ('?');
+ if (lseek(ch_file, (off_t)pos, SEEK_SET) == BAD_LSEEK)
+ {
+ error("seek error", NULL_PARG);
+ clear_eol();
+ return (EOI);
+ }
+ ch_fpos = pos;
+ }
+
+ /*
+ * Read the block.
+ * If we read less than a full block, that's ok.
+ * We use partial block and pick up the rest next time.
+ */
+ if (ch_ungotchar != -1)
+ {
+ bp->data[bp->datasize] = ch_ungotchar;
+ n = 1;
+ ch_ungotchar = -1;
+ } else if (ch_flags & CH_HELPFILE)
+ {
+ bp->data[bp->datasize] = helpdata[ch_fpos];
+ n = 1;
+ } else
+ {
+ n = iread(ch_file, &bp->data[bp->datasize],
+ (unsigned int)(LBUFSIZE - bp->datasize));
+ }
+
+ if (n == READ_INTR)
+ return (EOI);
+ if (n < 0)
+ {
+#if MSDOS_COMPILER==WIN32C
+ if (errno != EPIPE)
+#endif
+ {
+ error("read error", NULL_PARG);
+ clear_eol();
+ }
+ n = 0;
+ }
+
+#if LOGFILE
+ /*
+ * If we have a log file, write the new data to it.
+ */
+ if (!secure && logfile >= 0 && n > 0)
+ write(logfile, (char *) &bp->data[bp->datasize], n);
+#endif
+
+ ch_fpos += n;
+ bp->datasize += n;
+
+ /*
+ * If we have read to end of file, set ch_fsize to indicate
+ * the position of the end of file.
+ */
+ if (n == 0)
+ {
+ ch_fsize = pos;
+ if (ignore_eoi)
+ {
+ /*
+ * We are ignoring EOF.
+ * Wait a while, then try again.
+ */
+ if (!slept)
+ {
+ PARG parg;
+ parg.p_string = wait_message();
+ ierror("%s", &parg);
+ }
+#if !MSDOS_COMPILER
+ sleep(1);
+#else
+#if MSDOS_COMPILER==WIN32C
+ Sleep(1000);
+#endif
+#endif
+ slept = TRUE;
+
+#if HAVE_STAT_INO
+ if (follow_mode == FOLLOW_NAME)
+ {
+ /* See whether the file's i-number has changed,
+ * or the file has shrunk.
+ * If so, force the file to be closed and
+ * reopened. */
+ struct stat st;
+ POSITION curr_pos = ch_tell();
+ int r = stat(get_filename(curr_ifile), &st);
+ if (r == 0 && (st.st_ino != curr_ino ||
+ st.st_dev != curr_dev ||
+ (curr_pos != NULL_POSITION && st.st_size < curr_pos)))
+ {
+ /* screen_trashed=2 causes
+ * make_display to reopen the file. */
+ screen_trashed = 2;
+ return (EOI);
+ }
+ }
+#endif
+ }
+ if (sigs)
+ return (EOI);
+ }
+
+ found:
+ if (ch_bufhead != bn)
+ {
+ /*
+ * Move the buffer to the head of the buffer chain.
+ * This orders the buffer chain, most- to least-recently used.
+ */
+ BUF_RM(bn);
+ BUF_INS_HEAD(bn);
+
+ /*
+ * Move to head of hash chain too.
+ */
+ BUF_HASH_RM(bn);
+ BUF_HASH_INS(bn, h);
+ }
+
+ if (ch_offset >= bp->datasize)
+ /*
+ * After all that, we still don't have enough data.
+ * Go back and try again.
+ */
+ goto read_more;
+
+ return (bp->data[ch_offset]);
+}
+
+/*
+ * ch_ungetchar is a rather kludgy and limited way to push
+ * a single char onto an input file descriptor.
+ */
+ public void
+ch_ungetchar(c)
+ int c;
+{
+ if (c != -1 && ch_ungotchar != -1)
+ error("ch_ungetchar overrun", NULL_PARG);
+ ch_ungotchar = c;
+}
+
+#if LOGFILE
+/*
+ * Close the logfile.
+ * If we haven't read all of standard input into it, do that now.
+ */
+ public void
+end_logfile()
+{
+ static int tried = FALSE;
+
+ if (logfile < 0)
+ return;
+ if (!tried && ch_fsize == NULL_POSITION)
+ {
+ tried = TRUE;
+ ierror("Finishing logfile", NULL_PARG);
+ while (ch_forw_get() != EOI)
+ if (ABORT_SIGS())
+ break;
+ }
+ close(logfile);
+ logfile = -1;
+ namelogfile = NULL;
+}
+
+/*
+ * Start a log file AFTER less has already been running.
+ * Invoked from the - command; see toggle_option().
+ * Write all the existing buffered data to the log file.
+ */
+ public void
+sync_logfile()
+{
+ register struct buf *bp;
+ register struct bufnode *bn;
+ int warned = FALSE;
+ BLOCKNUM block;
+ BLOCKNUM nblocks;
+
+ nblocks = (ch_fpos + LBUFSIZE - 1) / LBUFSIZE;
+ for (block = 0; block < nblocks; block++)
+ {
+ int wrote = FALSE;
+ FOR_BUFS(bn)
+ {
+ bp = bufnode_buf(bn);
+ if (bp->block == block)
+ {
+ write(logfile, (char *) bp->data, bp->datasize);
+ wrote = TRUE;
+ break;
+ }
+ }
+ if (!wrote && !warned)
+ {
+ error("Warning: log file is incomplete",
+ NULL_PARG);
+ warned = TRUE;
+ }
+ }
+}
+
+#endif
+
+/*
+ * Determine if a specific block is currently in one of the buffers.
+ */
+ static int
+buffered(block)
+ BLOCKNUM block;
+{
+ register struct buf *bp;
+ register struct bufnode *bn;
+ register int h;
+
+ h = BUFHASH(block);
+ FOR_BUFS_IN_CHAIN(h, bn)
+ {
+ bp = bufnode_buf(bn);
+ if (bp->block == block)
+ return (TRUE);
+ }
+ return (FALSE);
+}
+
+/*
+ * Seek to a specified position in the file.
+ * Return 0 if successful, non-zero if can't seek there.
+ */
+ public int
+ch_seek(pos)
+ register POSITION pos;
+{
+ BLOCKNUM new_block;
+ POSITION len;
+
+ if (thisfile == NULL)
+ return (0);
+
+ len = ch_length();
+ if (pos < ch_zero() || (len != NULL_POSITION && pos > len))
+ return (1);
+
+ new_block = pos / LBUFSIZE;
+ if (!(ch_flags & CH_CANSEEK) && pos != ch_fpos && !buffered(new_block))
+ {
+ if (ch_fpos > pos)
+ return (1);
+ while (ch_fpos < pos)
+ {
+ if (ch_forw_get() == EOI)
+ return (1);
+ if (ABORT_SIGS())
+ return (1);
+ }
+ return (0);
+ }
+ /*
+ * Set read pointer.
+ */
+ ch_block = new_block;
+ ch_offset = pos % LBUFSIZE;
+ return (0);
+}
+
+/*
+ * Seek to the end of the file.
+ */
+ public int
+ch_end_seek()
+{
+ POSITION len;
+
+ if (thisfile == NULL)
+ return (0);
+
+ if (ch_flags & CH_CANSEEK)
+ ch_fsize = filesize(ch_file);
+
+ len = ch_length();
+ if (len != NULL_POSITION)
+ return (ch_seek(len));
+
+ /*
+ * Do it the slow way: read till end of data.
+ */
+ while (ch_forw_get() != EOI)
+ if (ABORT_SIGS())
+ return (1);
+ return (0);
+}
+
+/*
+ * Seek to the last position in the file that is currently buffered.
+ */
+ public int
+ch_end_buffer_seek()
+{
+ register struct buf *bp;
+ register struct bufnode *bn;
+ POSITION buf_pos;
+ POSITION end_pos;
+
+ if (thisfile == NULL || (ch_flags & CH_CANSEEK))
+ return (ch_end_seek());
+
+ end_pos = 0;
+ FOR_BUFS(bn)
+ {
+ bp = bufnode_buf(bn);
+ buf_pos = (bp->block * LBUFSIZE) + bp->datasize;
+ if (buf_pos > end_pos)
+ end_pos = buf_pos;
+ }
+
+ return (ch_seek(end_pos));
+}
+
+/*
+ * Seek to the beginning of the file, or as close to it as we can get.
+ * We may not be able to seek there if input is a pipe and the
+ * beginning of the pipe is no longer buffered.
+ */
+ public int
+ch_beg_seek()
+{
+ register struct bufnode *bn;
+ register struct bufnode *firstbn;
+
+ /*
+ * Try a plain ch_seek first.
+ */
+ if (ch_seek(ch_zero()) == 0)
+ return (0);
+
+ /*
+ * Can't get to position 0.
+ * Look thru the buffers for the one closest to position 0.
+ */
+ firstbn = ch_bufhead;
+ if (firstbn == END_OF_CHAIN)
+ return (1);
+ FOR_BUFS(bn)
+ {
+ if (bufnode_buf(bn)->block < bufnode_buf(firstbn)->block)
+ firstbn = bn;
+ }
+ ch_block = bufnode_buf(firstbn)->block;
+ ch_offset = 0;
+ return (0);
+}
+
+/*
+ * Return the length of the file, if known.
+ */
+ public POSITION
+ch_length()
+{
+ if (thisfile == NULL)
+ return (NULL_POSITION);
+ if (ignore_eoi)
+ return (NULL_POSITION);
+ if (ch_flags & CH_HELPFILE)
+ return (size_helpdata);
+ if (ch_flags & CH_NODATA)
+ return (0);
+ return (ch_fsize);
+}
+
+/*
+ * Return the current position in the file.
+ */
+ public POSITION
+ch_tell()
+{
+ if (thisfile == NULL)
+ return (NULL_POSITION);
+ return (ch_block * LBUFSIZE) + ch_offset;
+}
+
+/*
+ * Get the current char and post-increment the read pointer.
+ */
+ public int
+ch_forw_get()
+{
+ register int c;
+
+ if (thisfile == NULL)
+ return (EOI);
+ c = ch_get();
+ if (c == EOI)
+ return (EOI);
+ if (ch_offset < LBUFSIZE-1)
+ ch_offset++;
+ else
+ {
+ ch_block ++;
+ ch_offset = 0;
+ }
+ return (c);
+}
+
+/*
+ * Pre-decrement the read pointer and get the new current char.
+ */
+ public int
+ch_back_get()
+{
+ if (thisfile == NULL)
+ return (EOI);
+ if (ch_offset > 0)
+ ch_offset --;
+ else
+ {
+ if (ch_block <= 0)
+ return (EOI);
+ if (!(ch_flags & CH_CANSEEK) && !buffered(ch_block-1))
+ return (EOI);
+ ch_block--;
+ ch_offset = LBUFSIZE-1;
+ }
+ return (ch_get());
+}
+
+/*
+ * Set max amount of buffer space.
+ * bufspace is in units of 1024 bytes. -1 mean no limit.
+ */
+ public void
+ch_setbufspace(bufspace)
+ int bufspace;
+{
+ if (bufspace < 0)
+ maxbufs = -1;
+ else
+ {
+ maxbufs = ((bufspace * 1024) + LBUFSIZE-1) / LBUFSIZE;
+ if (maxbufs < 1)
+ maxbufs = 1;
+ }
+}
+
+/*
+ * Flush (discard) any saved file state, including buffer contents.
+ */
+ public void
+ch_flush()
+{
+ register struct bufnode *bn;
+
+ if (thisfile == NULL)
+ return;
+
+ if (!(ch_flags & CH_CANSEEK))
+ {
+ /*
+ * If input is a pipe, we don't flush buffer contents,
+ * since the contents can't be recovered.
+ */
+ ch_fsize = NULL_POSITION;
+ return;
+ }
+
+ /*
+ * Initialize all the buffers.
+ */
+ FOR_BUFS(bn)
+ {
+ bufnode_buf(bn)->block = -1;
+ }
+
+ /*
+ * Figure out the size of the file, if we can.
+ */
+ ch_fsize = filesize(ch_file);
+
+ /*
+ * Seek to a known position: the beginning of the file.
+ */
+ ch_fpos = 0;
+ ch_block = 0; /* ch_fpos / LBUFSIZE; */
+ ch_offset = 0; /* ch_fpos % LBUFSIZE; */
+
+#if 1
+ /*
+ * This is a kludge to workaround a Linux kernel bug: files in
+ * /proc have a size of 0 according to fstat() but have readable
+ * data. They are sometimes, but not always, seekable.
+ * Force them to be non-seekable here.
+ */
+ if (ch_fsize == 0)
+ {
+ ch_fsize = NULL_POSITION;
+ ch_flags &= ~CH_CANSEEK;
+ }
+#endif
+
+ if (lseek(ch_file, (off_t)0, SEEK_SET) == BAD_LSEEK)
+ {
+ /*
+ * Warning only; even if the seek fails for some reason,
+ * there's a good chance we're at the beginning anyway.
+ * {{ I think this is bogus reasoning. }}
+ */
+ error("seek error to 0", NULL_PARG);
+ }
+}
+
+/*
+ * Allocate a new buffer.
+ * The buffer is added to the tail of the buffer chain.
+ */
+ static int
+ch_addbuf()
+{
+ register struct buf *bp;
+ register struct bufnode *bn;
+
+ /*
+ * Allocate and initialize a new buffer and link it
+ * onto the tail of the buffer list.
+ */
+ bp = (struct buf *) calloc(1, sizeof(struct buf));
+ if (bp == NULL)
+ return (1);
+ ch_nbufs++;
+ bp->block = -1;
+ bn = &bp->node;
+
+ BUF_INS_TAIL(bn);
+ BUF_HASH_INS(bn, 0);
+ return (0);
+}
+
+/*
+ *
+ */
+ static void
+init_hashtbl()
+{
+ register int h;
+
+ for (h = 0; h < BUFHASH_SIZE; h++)
+ {
+ thisfile->hashtbl[h].hnext = END_OF_HCHAIN(h);
+ thisfile->hashtbl[h].hprev = END_OF_HCHAIN(h);
+ }
+}
+
+/*
+ * Delete all buffers for this file.
+ */
+ static void
+ch_delbufs()
+{
+ register struct bufnode *bn;
+
+ while (ch_bufhead != END_OF_CHAIN)
+ {
+ bn = ch_bufhead;
+ BUF_RM(bn);
+ free(bufnode_buf(bn));
+ }
+ ch_nbufs = 0;
+ init_hashtbl();
+}
+
+/*
+ * Is it possible to seek on a file descriptor?
+ */
+ public int
+seekable(f)
+ int f;
+{
+#if MSDOS_COMPILER
+ extern int fd0;
+ if (f == fd0 && !isatty(fd0))
+ {
+ /*
+ * In MS-DOS, pipes are seekable. Check for
+ * standard input, and pretend it is not seekable.
+ */
+ return (0);
+ }
+#endif
+ return (lseek(f, (off_t)1, SEEK_SET) != BAD_LSEEK);
+}
+
+/*
+ * Force EOF to be at the current read position.
+ * This is used after an ignore_eof read, during which the EOF may change.
+ */
+ public void
+ch_set_eof()
+{
+ ch_fsize = ch_fpos;
+}
+
+
+/*
+ * Initialize file state for a new file.
+ */
+ public void
+ch_init(f, flags)
+ int f;
+ int flags;
+{
+ /*
+ * See if we already have a filestate for this file.
+ */
+ thisfile = (struct filestate *) get_filestate(curr_ifile);
+ if (thisfile == NULL)
+ {
+ /*
+ * Allocate and initialize a new filestate.
+ */
+ thisfile = (struct filestate *)
+ calloc(1, sizeof(struct filestate));
+ thisfile->buflist.next = thisfile->buflist.prev = END_OF_CHAIN;
+ thisfile->nbufs = 0;
+ thisfile->flags = 0;
+ thisfile->fpos = 0;
+ thisfile->block = 0;
+ thisfile->offset = 0;
+ thisfile->file = -1;
+ thisfile->fsize = NULL_POSITION;
+ ch_flags = flags;
+ init_hashtbl();
+ /*
+ * Try to seek; set CH_CANSEEK if it works.
+ */
+ if ((flags & CH_CANSEEK) && !seekable(f))
+ ch_flags &= ~CH_CANSEEK;
+ set_filestate(curr_ifile, (void *) thisfile);
+ }
+ if (thisfile->file == -1)
+ thisfile->file = f;
+ ch_flush();
+}
+
+/*
+ * Close a filestate.
+ */
+ public void
+ch_close()
+{
+ int keepstate = FALSE;
+
+ if (thisfile == NULL)
+ return;
+
+ if (ch_flags & (CH_CANSEEK|CH_POPENED|CH_HELPFILE))
+ {
+ /*
+ * We can seek or re-open, so we don't need to keep buffers.
+ */
+ ch_delbufs();
+ } else
+ keepstate = TRUE;
+ if (!(ch_flags & CH_KEEPOPEN))
+ {
+ /*
+ * We don't need to keep the file descriptor open
+ * (because we can re-open it.)
+ * But don't really close it if it was opened via popen(),
+ * because pclose() wants to close it.
+ */
+ if (!(ch_flags & (CH_POPENED|CH_HELPFILE)))
+ close(ch_file);
+ ch_file = -1;
+ } else
+ keepstate = TRUE;
+ if (!keepstate)
+ {
+ /*
+ * We don't even need to keep the filestate structure.
+ */
+ free(thisfile);
+ thisfile = NULL;
+ set_filestate(curr_ifile, (void *) NULL);
+ }
+}
+
+/*
+ * Return ch_flags for the current file.
+ */
+ public int
+ch_getflags()
+{
+ if (thisfile == NULL)
+ return (0);
+ return (ch_flags);
+}
+
+#if 0
+ public void
+ch_dump(struct filestate *fs)
+{
+ struct buf *bp;
+ struct bufnode *bn;
+ unsigned char *s;
+
+ if (fs == NULL)
+ {
+ printf(" --no filestate\n");
+ return;
+ }
+ printf(" file %d, flags %x, fpos %x, fsize %x, blk/off %x/%x\n",
+ fs->file, fs->flags, fs->fpos,
+ fs->fsize, fs->block, fs->offset);
+ printf(" %d bufs:\n", fs->nbufs);
+ for (bn = fs->next; bn != &fs->buflist; bn = bn->next)
+ {
+ bp = bufnode_buf(bn);
+ printf("%x: blk %x, size %x \"",
+ bp, bp->block, bp->datasize);
+ for (s = bp->data; s < bp->data + 30; s++)
+ if (*s >= ' ' && *s < 0x7F)
+ printf("%c", *s);
+ else
+ printf(".");
+ printf("\"\n");
+ }
+}
+#endif
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Functions to define the character set
+ * and do things specific to the character set.
+ */
+
+#include "less.h"
+#if HAVE_LOCALE
+#include <locale.h>
+#include <ctype.h>
+#include <langinfo.h>
+#endif
+
+#include "charset.h"
+
+public int utf_mode = 0;
+
+/*
+ * Predefined character sets,
+ * selected by the LESSCHARSET environment variable.
+ */
+struct charset {
+ char *name;
+ int *p_flag;
+ char *desc;
+} charsets[] = {
+ { "ascii", NULL, "8bcccbcc18b95.b" },
+ { "utf-8", &utf_mode, "8bcccbcc18b95.b126.bb" },
+ { "iso8859", NULL, "8bcccbcc18b95.33b." },
+ { "latin3", NULL, "8bcccbcc18b95.33b5.b8.b15.b4.b12.b18.b12.b." },
+ { "arabic", NULL, "8bcccbcc18b95.33b.3b.7b2.13b.3b.b26.5b19.b" },
+ { "greek", NULL, "8bcccbcc18b95.33b4.2b4.b3.b35.b44.b" },
+ { "greek2005", NULL, "8bcccbcc18b95.33b14.b35.b44.b" },
+ { "hebrew", NULL, "8bcccbcc18b95.33b.b29.32b28.2b2.b" },
+ { "koi8-r", NULL, "8bcccbcc18b95.b." },
+ { "KOI8-T", NULL, "8bcccbcc18b95.b8.b6.b8.b.b.5b7.3b4.b4.b3.b.b.3b." },
+ { "georgianps", NULL, "8bcccbcc18b95.3b11.4b12.2b." },
+ { "tcvn", NULL, "b..b...bcccbccbbb7.8b95.b48.5b." },
+ { "TIS-620", NULL, "8bcccbcc18b95.b.4b.11b7.8b." },
+ { "next", NULL, "8bcccbcc18b95.bb125.bb" },
+ { "dos", NULL, "8bcccbcc12bc5b95.b." },
+ { "windows-1251", NULL, "8bcccbcc12bc5b95.b24.b." },
+ { "windows-1252", NULL, "8bcccbcc12bc5b95.b.b11.b.2b12.b." },
+ { "windows-1255", NULL, "8bcccbcc12bc5b95.b.b8.b.5b9.b.4b." },
+ { "ebcdic", NULL, "5bc6bcc7bcc41b.9b7.9b5.b..8b6.10b6.b9.7b9.8b8.17b3.3b9.7b9.8b8.6b10.b.b.b." },
+ { "IBM-1047", NULL, "4cbcbc3b9cbccbccbb4c6bcc5b3cbbc4bc4bccbc191.b" },
+ { NULL, NULL, NULL }
+};
+
+/*
+ * Support "locale charmap"/nl_langinfo(CODESET) values, as well as others.
+ */
+struct cs_alias {
+ char *name;
+ char *oname;
+} cs_aliases[] = {
+ { "UTF-8", "utf-8" },
+ { "ANSI_X3.4-1968", "ascii" },
+ { "US-ASCII", "ascii" },
+ { "latin1", "iso8859" },
+ { "ISO-8859-1", "iso8859" },
+ { "latin9", "iso8859" },
+ { "ISO-8859-15", "iso8859" },
+ { "latin2", "iso8859" },
+ { "ISO-8859-2", "iso8859" },
+ { "ISO-8859-3", "latin3" },
+ { "latin4", "iso8859" },
+ { "ISO-8859-4", "iso8859" },
+ { "cyrillic", "iso8859" },
+ { "ISO-8859-5", "iso8859" },
+ { "ISO-8859-6", "arabic" },
+ { "ISO-8859-7", "greek" },
+ { "IBM9005", "greek2005" },
+ { "ISO-8859-8", "hebrew" },
+ { "latin5", "iso8859" },
+ { "ISO-8859-9", "iso8859" },
+ { "latin6", "iso8859" },
+ { "ISO-8859-10", "iso8859" },
+ { "latin7", "iso8859" },
+ { "ISO-8859-13", "iso8859" },
+ { "latin8", "iso8859" },
+ { "ISO-8859-14", "iso8859" },
+ { "latin10", "iso8859" },
+ { "ISO-8859-16", "iso8859" },
+ { "IBM437", "dos" },
+ { "EBCDIC-US", "ebcdic" },
+ { "IBM1047", "IBM-1047" },
+ { "KOI8-R", "koi8-r" },
+ { "KOI8-U", "koi8-r" },
+ { "GEORGIAN-PS", "georgianps" },
+ { "TCVN5712-1", "tcvn" },
+ { "NEXTSTEP", "next" },
+ { "windows", "windows-1252" }, /* backward compatibility */
+ { "CP1251", "windows-1251" },
+ { "CP1252", "windows-1252" },
+ { "CP1255", "windows-1255" },
+ { NULL, NULL }
+};
+
+#define IS_BINARY_CHAR 01
+#define IS_CONTROL_CHAR 02
+
+static char chardef[256];
+static char *binfmt = NULL;
+static char *utfbinfmt = NULL;
+public int binattr = AT_STANDOUT;
+
+
+/*
+ * Define a charset, given a description string.
+ * The string consists of 256 letters,
+ * one for each character in the charset.
+ * If the string is shorter than 256 letters, missing letters
+ * are taken to be identical to the last one.
+ * A decimal number followed by a letter is taken to be a
+ * repetition of the letter.
+ *
+ * Each letter is one of:
+ * . normal character
+ * b binary character
+ * c control character
+ */
+ static void
+ichardef(s)
+ char *s;
+{
+ register char *cp;
+ register int n;
+ register char v;
+
+ n = 0;
+ v = 0;
+ cp = chardef;
+ while (*s != '\0')
+ {
+ switch (*s++)
+ {
+ case '.':
+ v = 0;
+ break;
+ case 'c':
+ v = IS_CONTROL_CHAR;
+ break;
+ case 'b':
+ v = IS_BINARY_CHAR|IS_CONTROL_CHAR;
+ break;
+
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ n = (10 * n) + (s[-1] - '0');
+ continue;
+
+ default:
+ error("invalid chardef", NULL_PARG);
+ quit(QUIT_ERROR);
+ /*NOTREACHED*/
+ }
+
+ do
+ {
+ if (cp >= chardef + sizeof(chardef))
+ {
+ error("chardef longer than 256", NULL_PARG);
+ quit(QUIT_ERROR);
+ /*NOTREACHED*/
+ }
+ *cp++ = v;
+ } while (--n > 0);
+ n = 0;
+ }
+
+ while (cp < chardef + sizeof(chardef))
+ *cp++ = v;
+}
+
+/*
+ * Define a charset, given a charset name.
+ * The valid charset names are listed in the "charsets" array.
+ */
+ static int
+icharset(name, no_error)
+ register char *name;
+ int no_error;
+{
+ register struct charset *p;
+ register struct cs_alias *a;
+
+ if (name == NULL || *name == '\0')
+ return (0);
+
+ /* First see if the name is an alias. */
+ for (a = cs_aliases; a->name != NULL; a++)
+ {
+ if (strcmp(name, a->name) == 0)
+ {
+ name = a->oname;
+ break;
+ }
+ }
+
+ for (p = charsets; p->name != NULL; p++)
+ {
+ if (strcmp(name, p->name) == 0)
+ {
+ ichardef(p->desc);
+ if (p->p_flag != NULL)
+ *(p->p_flag) = 1;
+ return (1);
+ }
+ }
+
+ if (!no_error) {
+ error("invalid charset name", NULL_PARG);
+ quit(QUIT_ERROR);
+ }
+ return (0);
+}
+
+#if HAVE_LOCALE
+/*
+ * Define a charset, given a locale name.
+ */
+ static void
+ilocale()
+{
+ register int c;
+
+ for (c = 0; c < (int) sizeof(chardef); c++)
+ {
+ if (isprint(c))
+ chardef[c] = 0;
+ else if (iscntrl(c))
+ chardef[c] = IS_CONTROL_CHAR;
+ else
+ chardef[c] = IS_BINARY_CHAR|IS_CONTROL_CHAR;
+ }
+}
+#endif
+
+/*
+ * Define the printing format for control (or binary utf) chars.
+ */
+ static void
+setbinfmt(s, fmtvarptr, default_fmt)
+ char *s;
+ char **fmtvarptr;
+ char *default_fmt;
+{
+ if (s && utf_mode)
+ {
+ /* It would be too hard to account for width otherwise. */
+ char *t = s;
+ while (*t)
+ {
+ if (*t < ' ' || *t > '~')
+ {
+ s = default_fmt;
+ goto attr;
+ }
+ t++;
+ }
+ }
+
+ /* %n is evil */
+ if (s == NULL || *s == '\0' ||
+ (*s == '*' && (s[1] == '\0' || s[2] == '\0' || strchr(s + 2, 'n'))) ||
+ (*s != '*' && strchr(s, 'n')))
+ s = default_fmt;
+
+ /*
+ * Select the attributes if it starts with "*".
+ */
+ attr:
+ if (*s == '*')
+ {
+ switch (s[1])
+ {
+ case 'd': binattr = AT_BOLD; break;
+ case 'k': binattr = AT_BLINK; break;
+ case 's': binattr = AT_STANDOUT; break;
+ case 'u': binattr = AT_UNDERLINE; break;
+ default: binattr = AT_NORMAL; break;
+ }
+ s += 2;
+ }
+ *fmtvarptr = s;
+}
+
+/*
+ *
+ */
+ static void
+set_charset()
+{
+ char *s;
+
+ /*
+ * See if environment variable LESSCHARSET is defined.
+ */
+ s = lgetenv("LESSCHARSET");
+ if (icharset(s, 0))
+ return;
+
+ /*
+ * LESSCHARSET is not defined: try LESSCHARDEF.
+ */
+ s = lgetenv("LESSCHARDEF");
+ if (s != NULL && *s != '\0')
+ {
+ ichardef(s);
+ return;
+ }
+
+#if HAVE_LOCALE
+#ifdef CODESET
+ /*
+ * Try using the codeset name as the charset name.
+ */
+ s = nl_langinfo(CODESET);
+ if (icharset(s, 1))
+ return;
+#endif
+#endif
+
+#if HAVE_STRSTR
+ /*
+ * Check whether LC_ALL, LC_CTYPE or LANG look like UTF-8 is used.
+ */
+ if ((s = lgetenv("LC_ALL")) != NULL ||
+ (s = lgetenv("LC_CTYPE")) != NULL ||
+ (s = lgetenv("LANG")) != NULL)
+ {
+ if ( strstr(s, "UTF-8") != NULL || strstr(s, "utf-8") != NULL
+ || strstr(s, "UTF8") != NULL || strstr(s, "utf8") != NULL)
+ if (icharset("utf-8", 1))
+ return;
+ }
+#endif
+
+#if HAVE_LOCALE
+ /*
+ * Get character definitions from locale functions,
+ * rather than from predefined charset entry.
+ */
+ ilocale();
+#if MSDOS_COMPILER
+ /*
+ * Default to "dos".
+ */
+ (void) icharset("dos", 1);
+#else
+ /*
+ * Default to "latin1".
+ */
+ (void) icharset("latin1", 1);
+#endif
+#endif
+}
+
+/*
+ * Initialize charset data structures.
+ */
+ public void
+init_charset()
+{
+ char *s;
+
+#if HAVE_LOCALE
+ setlocale(LC_ALL, "");
+#endif
+
+ set_charset();
+
+ s = lgetenv("LESSBINFMT");
+ setbinfmt(s, &binfmt, "*s<%02X>");
+
+ s = lgetenv("LESSUTFBINFMT");
+ setbinfmt(s, &utfbinfmt, "<U+%04lX>");
+}
+
+/*
+ * Is a given character a "binary" character?
+ */
+ public int
+binary_char(c)
+ LWCHAR c;
+{
+ if (utf_mode)
+ return (is_ubin_char(c));
+ c &= 0377;
+ return (chardef[c] & IS_BINARY_CHAR);
+}
+
+/*
+ * Is a given character a "control" character?
+ */
+ public int
+control_char(c)
+ LWCHAR c;
+{
+ c &= 0377;
+ return (chardef[c] & IS_CONTROL_CHAR);
+}
+
+/*
+ * Return the printable form of a character.
+ * For example, in the "ascii" charset '\3' is printed as "^C".
+ */
+ public char *
+prchar(c)
+ LWCHAR c;
+{
+ /* {{ This buffer can be overrun if LESSBINFMT is a long string. }} */
+ static char buf[32];
+
+ c &= 0377;
+ if ((c < 128 || !utf_mode) && !control_char(c))
+ SNPRINTF1(buf, sizeof(buf), "%c", (int) c);
+ else if (c == ESC)
+ strcpy(buf, "ESC");
+#if IS_EBCDIC_HOST
+ else if (!binary_char(c) && c < 64)
+ SNPRINTF1(buf, sizeof(buf), "^%c",
+ /*
+ * This array roughly inverts CONTROL() #defined in less.h,
+ * and should be kept in sync with CONTROL() and IBM-1047.
+ */
+ "@ABC.I.?...KLMNO"
+ "PQRS.JH.XY.."
+ "\\]^_"
+ "......W[.....EFG"
+ "..V....D....TU.Z"[c]);
+#else
+ else if (c < 128 && !control_char(c ^ 0100))
+ SNPRINTF1(buf, sizeof(buf), "^%c", (int) (c ^ 0100));
+#endif
+ else
+ SNPRINTF1(buf, sizeof(buf), binfmt, c);
+ return (buf);
+}
+
+/*
+ * Return the printable form of a UTF-8 character.
+ */
+ public char *
+prutfchar(ch)
+ LWCHAR ch;
+{
+ static char buf[32];
+
+ if (ch == ESC)
+ strcpy(buf, "ESC");
+ else if (ch < 128 && control_char(ch))
+ {
+ if (!control_char(ch ^ 0100))
+ SNPRINTF1(buf, sizeof(buf), "^%c", ((char) ch) ^ 0100);
+ else
+ SNPRINTF1(buf, sizeof(buf), binfmt, (char) ch);
+ } else if (is_ubin_char(ch))
+ {
+ SNPRINTF1(buf, sizeof(buf), utfbinfmt, ch);
+ } else
+ {
+ char *p = buf;
+ if (ch >= 0x80000000)
+ ch = 0xFFFD; /* REPLACEMENT CHARACTER */
+ put_wchar(&p, ch);
+ *p = '\0';
+ }
+ return (buf);
+}
+
+/*
+ * Get the length of a UTF-8 character in bytes.
+ */
+ public int
+utf_len(ch)
+ char ch;
+{
+ if ((ch & 0x80) == 0)
+ return 1;
+ if ((ch & 0xE0) == 0xC0)
+ return 2;
+ if ((ch & 0xF0) == 0xE0)
+ return 3;
+ if ((ch & 0xF8) == 0xF0)
+ return 4;
+ if ((ch & 0xFC) == 0xF8)
+ return 5;
+ if ((ch & 0xFE) == 0xFC)
+ return 6;
+ /* Invalid UTF-8 encoding. */
+ return 1;
+}
+
+/*
+ * Does the parameter point to the lead byte of a well-formed UTF-8 character?
+ */
+ public int
+is_utf8_well_formed(s, slen)
+ unsigned char *s;
+ int slen;
+{
+ int i;
+ int len;
+
+ if (IS_UTF8_INVALID(s[0]))
+ return (0);
+
+ len = utf_len((char) s[0]);
+ if (len > slen)
+ return (0);
+ if (len == 1)
+ return (1);
+ if (len == 2)
+ {
+ if (s[0] < 0xC2)
+ return (0);
+ } else
+ {
+ unsigned char mask;
+ mask = (~((1 << (8-len)) - 1)) & 0xFF;
+ if (s[0] == mask && (s[1] & mask) == 0x80)
+ return (0);
+ }
+
+ for (i = 1; i < len; i++)
+ if (!IS_UTF8_TRAIL(s[i]))
+ return (0);
+ return (1);
+}
+
+/*
+ * Return number of invalid UTF-8 sequences found in a buffer.
+ */
+ public int
+utf_bin_count(data, len)
+ unsigned char *data;
+ int len;
+{
+ int bin_count = 0;
+ while (len > 0)
+ {
+ if (is_utf8_well_formed(data, len))
+ {
+ int clen = utf_len(*data);
+ data += clen;
+ len -= clen;
+ } else
+ {
+ /* Skip to next lead byte. */
+ bin_count++;
+ do {
+ ++data;
+ --len;
+ } while (len > 0 && !IS_UTF8_LEAD(*data));
+ }
+ }
+ return (bin_count);
+}
+
+/*
+ * Get the value of a UTF-8 character.
+ */
+ public LWCHAR
+get_wchar(p)
+ char *p;
+{
+ switch (utf_len(p[0]))
+ {
+ case 1:
+ default:
+ /* 0xxxxxxx */
+ return (LWCHAR)
+ (p[0] & 0xFF);
+ case 2:
+ /* 110xxxxx 10xxxxxx */
+ return (LWCHAR) (
+ ((p[0] & 0x1F) << 6) |
+ (p[1] & 0x3F));
+ case 3:
+ /* 1110xxxx 10xxxxxx 10xxxxxx */
+ return (LWCHAR) (
+ ((p[0] & 0x0F) << 12) |
+ ((p[1] & 0x3F) << 6) |
+ (p[2] & 0x3F));
+ case 4:
+ /* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
+ return (LWCHAR) (
+ ((p[0] & 0x07) << 18) |
+ ((p[1] & 0x3F) << 12) |
+ ((p[2] & 0x3F) << 6) |
+ (p[3] & 0x3F));
+ case 5:
+ /* 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx */
+ return (LWCHAR) (
+ ((p[0] & 0x03) << 24) |
+ ((p[1] & 0x3F) << 18) |
+ ((p[2] & 0x3F) << 12) |
+ ((p[3] & 0x3F) << 6) |
+ (p[4] & 0x3F));
+ case 6:
+ /* 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx */
+ return (LWCHAR) (
+ ((p[0] & 0x01) << 30) |
+ ((p[1] & 0x3F) << 24) |
+ ((p[2] & 0x3F) << 18) |
+ ((p[3] & 0x3F) << 12) |
+ ((p[4] & 0x3F) << 6) |
+ (p[5] & 0x3F));
+ }
+}
+
+/*
+ * Store a character into a UTF-8 string.
+ */
+ public void
+put_wchar(pp, ch)
+ char **pp;
+ LWCHAR ch;
+{
+ if (!utf_mode || ch < 0x80)
+ {
+ /* 0xxxxxxx */
+ *(*pp)++ = (char) ch;
+ } else if (ch < 0x800)
+ {
+ /* 110xxxxx 10xxxxxx */
+ *(*pp)++ = (char) (0xC0 | ((ch >> 6) & 0x1F));
+ *(*pp)++ = (char) (0x80 | (ch & 0x3F));
+ } else if (ch < 0x10000)
+ {
+ /* 1110xxxx 10xxxxxx 10xxxxxx */
+ *(*pp)++ = (char) (0xE0 | ((ch >> 12) & 0x0F));
+ *(*pp)++ = (char) (0x80 | ((ch >> 6) & 0x3F));
+ *(*pp)++ = (char) (0x80 | (ch & 0x3F));
+ } else if (ch < 0x200000)
+ {
+ /* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
+ *(*pp)++ = (char) (0xF0 | ((ch >> 18) & 0x07));
+ *(*pp)++ = (char) (0x80 | ((ch >> 12) & 0x3F));
+ *(*pp)++ = (char) (0x80 | ((ch >> 6) & 0x3F));
+ *(*pp)++ = (char) (0x80 | (ch & 0x3F));
+ } else if (ch < 0x4000000)
+ {
+ /* 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx */
+ *(*pp)++ = (char) (0xF0 | ((ch >> 24) & 0x03));
+ *(*pp)++ = (char) (0x80 | ((ch >> 18) & 0x3F));
+ *(*pp)++ = (char) (0x80 | ((ch >> 12) & 0x3F));
+ *(*pp)++ = (char) (0x80 | ((ch >> 6) & 0x3F));
+ *(*pp)++ = (char) (0x80 | (ch & 0x3F));
+ } else
+ {
+ /* 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx */
+ *(*pp)++ = (char) (0xF0 | ((ch >> 30) & 0x01));
+ *(*pp)++ = (char) (0x80 | ((ch >> 24) & 0x3F));
+ *(*pp)++ = (char) (0x80 | ((ch >> 18) & 0x3F));
+ *(*pp)++ = (char) (0x80 | ((ch >> 12) & 0x3F));
+ *(*pp)++ = (char) (0x80 | ((ch >> 6) & 0x3F));
+ *(*pp)++ = (char) (0x80 | (ch & 0x3F));
+ }
+}
+
+/*
+ * Step forward or backward one character in a string.
+ */
+ public LWCHAR
+step_char(pp, dir, limit)
+ char **pp;
+ signed int dir;
+ char *limit;
+{
+ LWCHAR ch;
+ int len;
+ char *p = *pp;
+
+ if (!utf_mode)
+ {
+ /* It's easy if chars are one byte. */
+ if (dir > 0)
+ ch = (LWCHAR) ((p < limit) ? *p++ : 0);
+ else
+ ch = (LWCHAR) ((p > limit) ? *--p : 0);
+ } else if (dir > 0)
+ {
+ len = utf_len(*p);
+ if (p + len > limit)
+ {
+ ch = 0;
+ p = limit;
+ } else
+ {
+ ch = get_wchar(p);
+ p += len;
+ }
+ } else
+ {
+ while (p > limit && IS_UTF8_TRAIL(p[-1]))
+ p--;
+ if (p > limit)
+ ch = get_wchar(--p);
+ else
+ ch = 0;
+ }
+ *pp = p;
+ return ch;
+}
+
+/*
+ * Unicode characters data
+ * Actual data is in the generated *.uni files.
+ */
+
+#define DECLARE_RANGE_TABLE_START(name) \
+ static struct wchar_range name##_array[] = {
+#define DECLARE_RANGE_TABLE_END(name) \
+ }; struct wchar_range_table name##_table = { name##_array, sizeof(name##_array)/sizeof(*name##_array) };
+
+DECLARE_RANGE_TABLE_START(compose)
+#include "compose.uni"
+DECLARE_RANGE_TABLE_END(compose)
+
+DECLARE_RANGE_TABLE_START(ubin)
+#include "ubin.uni"
+DECLARE_RANGE_TABLE_END(ubin)
+
+DECLARE_RANGE_TABLE_START(wide)
+#include "wide.uni"
+DECLARE_RANGE_TABLE_END(wide)
+
+/* comb_table is special pairs, not ranges. */
+static struct wchar_range comb_table[] = {
+ {0x0644,0x0622}, {0x0644,0x0623}, {0x0644,0x0625}, {0x0644,0x0627},
+};
+
+
+ static int
+is_in_table(ch, table)
+ LWCHAR ch;
+ struct wchar_range_table *table;
+{
+ int hi;
+ int lo;
+
+ /* Binary search in the table. */
+ if (ch < table->table[0].first)
+ return 0;
+ lo = 0;
+ hi = table->count - 1;
+ while (lo <= hi)
+ {
+ int mid = (lo + hi) / 2;
+ if (ch > table->table[mid].last)
+ lo = mid + 1;
+ else if (ch < table->table[mid].first)
+ hi = mid - 1;
+ else
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Is a character a UTF-8 composing character?
+ * If a composing character follows any char, the two combine into one glyph.
+ */
+ public int
+is_composing_char(ch)
+ LWCHAR ch;
+{
+ return is_in_table(ch, &compose_table);
+}
+
+/*
+ * Should this UTF-8 character be treated as binary?
+ */
+ public int
+is_ubin_char(ch)
+ LWCHAR ch;
+{
+ return is_in_table(ch, &ubin_table);
+}
+
+/*
+ * Is this a double width UTF-8 character?
+ */
+ public int
+is_wide_char(ch)
+ LWCHAR ch;
+{
+ return is_in_table(ch, &wide_table);
+}
+
+/*
+ * Is a character a UTF-8 combining character?
+ * A combining char acts like an ordinary char, but if it follows
+ * a specific char (not any char), the two combine into one glyph.
+ */
+ public int
+is_combining_char(ch1, ch2)
+ LWCHAR ch1;
+ LWCHAR ch2;
+{
+ /* The table is small; use linear search. */
+ int i;
+ for (i = 0; i < sizeof(comb_table)/sizeof(*comb_table); i++)
+ {
+ if (ch1 == comb_table[i].first &&
+ ch2 == comb_table[i].last)
+ return 1;
+ }
+ return 0;
+}
+
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+#define IS_ASCII_OCTET(c) (((c) & 0x80) == 0)
+#define IS_UTF8_TRAIL(c) (((c) & 0xC0) == 0x80)
+#define IS_UTF8_LEAD2(c) (((c) & 0xE0) == 0xC0)
+#define IS_UTF8_LEAD3(c) (((c) & 0xF0) == 0xE0)
+#define IS_UTF8_LEAD4(c) (((c) & 0xF8) == 0xF0)
+#define IS_UTF8_LEAD5(c) (((c) & 0xFC) == 0xF8)
+#define IS_UTF8_LEAD6(c) (((c) & 0xFE) == 0xFC)
+#define IS_UTF8_INVALID(c) (((c) & 0xFE) == 0xFE)
+#define IS_UTF8_LEAD(c) (((c) & 0xC0) == 0xC0 && !IS_UTF8_INVALID(c))
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+#define MAX_USERCMD 1000
+#define MAX_CMDLEN 16
+
+#define A_B_LINE 2
+#define A_B_SCREEN 3
+#define A_B_SCROLL 4
+#define A_B_SEARCH 5
+#define A_DIGIT 6
+#define A_DISP_OPTION 7
+#define A_DEBUG 8
+#define A_EXAMINE 9
+#define A_FIRSTCMD 10
+#define A_FREPAINT 11
+#define A_F_LINE 12
+#define A_F_SCREEN 13
+#define A_F_SCROLL 14
+#define A_F_SEARCH 15
+#define A_GOEND 16
+#define A_GOLINE 17
+#define A_GOMARK 18
+#define A_HELP 19
+#define A_NEXT_FILE 20
+#define A_PERCENT 21
+#define A_PREFIX 22
+#define A_PREV_FILE 23
+#define A_QUIT 24
+#define A_REPAINT 25
+#define A_SETMARK 26
+#define A_SHELL 27
+#define A_STAT 28
+#define A_FF_LINE 29
+#define A_BF_LINE 30
+#define A_VERSION 31
+#define A_VISUAL 32
+#define A_F_WINDOW 33
+#define A_B_WINDOW 34
+#define A_F_BRACKET 35
+#define A_B_BRACKET 36
+#define A_PIPE 37
+#define A_INDEX_FILE 38
+#define A_UNDO_SEARCH 39
+#define A_FF_SCREEN 40
+#define A_LSHIFT 41
+#define A_RSHIFT 42
+#define A_AGAIN_SEARCH 43
+#define A_T_AGAIN_SEARCH 44
+#define A_REVERSE_SEARCH 45
+#define A_T_REVERSE_SEARCH 46
+#define A_OPT_TOGGLE 47
+#define A_OPT_SET 48
+#define A_OPT_UNSET 49
+#define A_F_FOREVER 50
+#define A_GOPOS 51
+#define A_REMOVE_FILE 52
+#define A_NEXT_TAG 53
+#define A_PREV_TAG 54
+#define A_FILTER 55
+#define A_F_UNTIL_HILITE 56
+#define A_GOEND_BUF 57
+
+#define A_INVALID 100
+#define A_NOACTION 101
+#define A_UINVALID 102
+#define A_END_LIST 103
+#define A_SPECIAL_KEY 104
+
+#define A_SKIP 127
+
+#define A_EXTRA 0200
+
+
+/* Line editing characters */
+
+#define EC_BACKSPACE 1
+#define EC_LINEKILL 2
+#define EC_RIGHT 3
+#define EC_LEFT 4
+#define EC_W_LEFT 5
+#define EC_W_RIGHT 6
+#define EC_INSERT 7
+#define EC_DELETE 8
+#define EC_HOME 9
+#define EC_END 10
+#define EC_W_BACKSPACE 11
+#define EC_W_DELETE 12
+#define EC_UP 13
+#define EC_DOWN 14
+#define EC_EXPAND 15
+#define EC_F_COMPLETE 17
+#define EC_B_COMPLETE 18
+#define EC_LITERAL 19
+#define EC_ABORT 20
+
+#define EC_NOACTION 101
+#define EC_UINVALID 102
+
+/* Flags for editchar() */
+#define EC_PEEK 01
+#define EC_NOHISTORY 02
+#define EC_NOCOMPLETE 04
+#define EC_NORIGHTLEFT 010
+
+/* Environment variable stuff */
+#define EV_OK 01
+
+/* Special keys (keys which output different strings on different terminals) */
+#define SK_SPECIAL_KEY CONTROL('K')
+#define SK_RIGHT_ARROW 1
+#define SK_LEFT_ARROW 2
+#define SK_UP_ARROW 3
+#define SK_DOWN_ARROW 4
+#define SK_PAGE_UP 5
+#define SK_PAGE_DOWN 6
+#define SK_HOME 7
+#define SK_END 8
+#define SK_DELETE 9
+#define SK_INSERT 10
+#define SK_CTL_LEFT_ARROW 11
+#define SK_CTL_RIGHT_ARROW 12
+#define SK_CTL_DELETE 13
+#define SK_F1 14
+#define SK_BACKTAB 15
+#define SK_CTL_BACKSPACE 16
+#define SK_CONTROL_K 40
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Functions which manipulate the command buffer.
+ * Used only by command() and related functions.
+ */
+
+#include "less.h"
+#include "cmd.h"
+#include "charset.h"
+#if HAVE_STAT
+#include <sys/stat.h>
+#endif
+
+extern int sc_width;
+extern int utf_mode;
+
+static char cmdbuf[CMDBUF_SIZE]; /* Buffer for holding a multi-char command */
+static int cmd_col; /* Current column of the cursor */
+static int prompt_col; /* Column of cursor just after prompt */
+static char *cp; /* Pointer into cmdbuf */
+static int cmd_offset; /* Index into cmdbuf of first displayed char */
+static int literal; /* Next input char should not be interpreted */
+static int updown_match = -1; /* Prefix length in up/down movement */
+
+#if TAB_COMPLETE_FILENAME
+static int cmd_complete();
+/*
+ * These variables are statics used by cmd_complete.
+ */
+static int in_completion = 0;
+static char *tk_text;
+static char *tk_original;
+static char *tk_ipoint;
+static char *tk_trial;
+static struct textlist tk_tlist;
+#endif
+
+static int cmd_left();
+static int cmd_right();
+
+#if SPACES_IN_FILENAMES
+public char openquote = '"';
+public char closequote = '"';
+#endif
+
+#if CMD_HISTORY
+
+/* History file */
+#define HISTFILE_FIRST_LINE ".less-history-file:"
+#define HISTFILE_SEARCH_SECTION ".search"
+#define HISTFILE_SHELL_SECTION ".shell"
+
+/*
+ * A mlist structure represents a command history.
+ */
+struct mlist
+{
+ struct mlist *next;
+ struct mlist *prev;
+ struct mlist *curr_mp;
+ char *string;
+ int modified;
+};
+
+/*
+ * These are the various command histories that exist.
+ */
+struct mlist mlist_search =
+ { &mlist_search, &mlist_search, &mlist_search, NULL, 0 };
+public void * constant ml_search = (void *) &mlist_search;
+
+struct mlist mlist_examine =
+ { &mlist_examine, &mlist_examine, &mlist_examine, NULL, 0 };
+public void * constant ml_examine = (void *) &mlist_examine;
+
+#if SHELL_ESCAPE || PIPEC
+struct mlist mlist_shell =
+ { &mlist_shell, &mlist_shell, &mlist_shell, NULL, 0 };
+public void * constant ml_shell = (void *) &mlist_shell;
+#endif
+
+#else /* CMD_HISTORY */
+
+/* If CMD_HISTORY is off, these are just flags. */
+public void * constant ml_search = (void *)1;
+public void * constant ml_examine = (void *)2;
+#if SHELL_ESCAPE || PIPEC
+public void * constant ml_shell = (void *)3;
+#endif
+
+#endif /* CMD_HISTORY */
+
+/*
+ * History for the current command.
+ */
+static struct mlist *curr_mlist = NULL;
+static int curr_cmdflags;
+
+static char cmd_mbc_buf[MAX_UTF_CHAR_LEN];
+static int cmd_mbc_buf_len;
+static int cmd_mbc_buf_index;
+
+
+/*
+ * Reset command buffer (to empty).
+ */
+ public void
+cmd_reset()
+{
+ cp = cmdbuf;
+ *cp = '\0';
+ cmd_col = 0;
+ cmd_offset = 0;
+ literal = 0;
+ cmd_mbc_buf_len = 0;
+ updown_match = -1;
+}
+
+/*
+ * Clear command line.
+ */
+ public void
+clear_cmd()
+{
+ cmd_col = prompt_col = 0;
+ cmd_mbc_buf_len = 0;
+ updown_match = -1;
+}
+
+/*
+ * Display a string, usually as a prompt for input into the command buffer.
+ */
+ public void
+cmd_putstr(s)
+ char *s;
+{
+ LWCHAR prev_ch = 0;
+ LWCHAR ch;
+ char *endline = s + strlen(s);
+ while (*s != '\0')
+ {
+ char *ns = s;
+ ch = step_char(&ns, +1, endline);
+ while (s < ns)
+ putchr(*s++);
+ if (!utf_mode)
+ {
+ cmd_col++;
+ prompt_col++;
+ } else if (!is_composing_char(ch) &&
+ !is_combining_char(prev_ch, ch))
+ {
+ int width = is_wide_char(ch) ? 2 : 1;
+ cmd_col += width;
+ prompt_col += width;
+ }
+ prev_ch = ch;
+ }
+}
+
+/*
+ * How many characters are in the command buffer?
+ */
+ public int
+len_cmdbuf()
+{
+ char *s = cmdbuf;
+ char *endline = s + strlen(s);
+ int len = 0;
+
+ while (*s != '\0')
+ {
+ step_char(&s, +1, endline);
+ len++;
+ }
+ return (len);
+}
+
+/*
+ * Common part of cmd_step_right() and cmd_step_left().
+ */
+ static char *
+cmd_step_common(p, ch, len, pwidth, bswidth)
+ char *p;
+ LWCHAR ch;
+ int len;
+ int *pwidth;
+ int *bswidth;
+{
+ char *pr;
+
+ if (len == 1)
+ {
+ pr = prchar((int) ch);
+ if (pwidth != NULL || bswidth != NULL)
+ {
+ int len = (int) strlen(pr);
+ if (pwidth != NULL)
+ *pwidth = len;
+ if (bswidth != NULL)
+ *bswidth = len;
+ }
+ } else
+ {
+ pr = prutfchar(ch);
+ if (pwidth != NULL || bswidth != NULL)
+ {
+ if (is_composing_char(ch))
+ {
+ if (pwidth != NULL)
+ *pwidth = 0;
+ if (bswidth != NULL)
+ *bswidth = 0;
+ } else if (is_ubin_char(ch))
+ {
+ int len = (int) strlen(pr);
+ if (pwidth != NULL)
+ *pwidth = len;
+ if (bswidth != NULL)
+ *bswidth = len;
+ } else
+ {
+ LWCHAR prev_ch = step_char(&p, -1, cmdbuf);
+ if (is_combining_char(prev_ch, ch))
+ {
+ if (pwidth != NULL)
+ *pwidth = 0;
+ if (bswidth != NULL)
+ *bswidth = 0;
+ } else
+ {
+ if (pwidth != NULL)
+ *pwidth = is_wide_char(ch)
+ ? 2
+ : 1;
+ if (bswidth != NULL)
+ *bswidth = 1;
+ }
+ }
+ }
+ }
+
+ return (pr);
+}
+
+/*
+ * Step a pointer one character right in the command buffer.
+ */
+ static char *
+cmd_step_right(pp, pwidth, bswidth)
+ char **pp;
+ int *pwidth;
+ int *bswidth;
+{
+ char *p = *pp;
+ LWCHAR ch = step_char(pp, +1, p + strlen(p));
+
+ return cmd_step_common(p, ch, *pp - p, pwidth, bswidth);
+}
+
+/*
+ * Step a pointer one character left in the command buffer.
+ */
+ static char *
+cmd_step_left(pp, pwidth, bswidth)
+ char **pp;
+ int *pwidth;
+ int *bswidth;
+{
+ char *p = *pp;
+ LWCHAR ch = step_char(pp, -1, cmdbuf);
+
+ return cmd_step_common(*pp, ch, p - *pp, pwidth, bswidth);
+}
+
+/*
+ * Repaint the line from cp onwards.
+ * Then position the cursor just after the char old_cp (a pointer into cmdbuf).
+ */
+ static void
+cmd_repaint(old_cp)
+ char *old_cp;
+{
+ /*
+ * Repaint the line from the current position.
+ */
+ clear_eol();
+ while (*cp != '\0')
+ {
+ char *np = cp;
+ int width;
+ char *pr = cmd_step_right(&np, &width, NULL);
+ if (cmd_col + width >= sc_width)
+ break;
+ cp = np;
+ putstr(pr);
+ cmd_col += width;
+ }
+ while (*cp != '\0')
+ {
+ char *np = cp;
+ int width;
+ char *pr = cmd_step_right(&np, &width, NULL);
+ if (width > 0)
+ break;
+ cp = np;
+ putstr(pr);
+ }
+
+ /*
+ * Back up the cursor to the correct position.
+ */
+ while (cp > old_cp)
+ cmd_left();
+}
+
+/*
+ * Put the cursor at "home" (just after the prompt),
+ * and set cp to the corresponding char in cmdbuf.
+ */
+ static void
+cmd_home()
+{
+ while (cmd_col > prompt_col)
+ {
+ int width, bswidth;
+
+ cmd_step_left(&cp, &width, &bswidth);
+ while (bswidth-- > 0)
+ putbs();
+ cmd_col -= width;
+ }
+
+ cp = &cmdbuf[cmd_offset];
+}
+
+/*
+ * Shift the cmdbuf display left a half-screen.
+ */
+ static void
+cmd_lshift()
+{
+ char *s;
+ char *save_cp;
+ int cols;
+
+ /*
+ * Start at the first displayed char, count how far to the
+ * right we'd have to move to reach the center of the screen.
+ */
+ s = cmdbuf + cmd_offset;
+ cols = 0;
+ while (cols < (sc_width - prompt_col) / 2 && *s != '\0')
+ {
+ int width;
+ cmd_step_right(&s, &width, NULL);
+ cols += width;
+ }
+ while (*s != '\0')
+ {
+ int width;
+ char *ns = s;
+ cmd_step_right(&ns, &width, NULL);
+ if (width > 0)
+ break;
+ s = ns;
+ }
+
+ cmd_offset = (int) (s - cmdbuf);
+ save_cp = cp;
+ cmd_home();
+ cmd_repaint(save_cp);
+}
+
+/*
+ * Shift the cmdbuf display right a half-screen.
+ */
+ static void
+cmd_rshift()
+{
+ char *s;
+ char *save_cp;
+ int cols;
+
+ /*
+ * Start at the first displayed char, count how far to the
+ * left we'd have to move to traverse a half-screen width
+ * of displayed characters.
+ */
+ s = cmdbuf + cmd_offset;
+ cols = 0;
+ while (cols < (sc_width - prompt_col) / 2 && s > cmdbuf)
+ {
+ int width;
+ cmd_step_left(&s, &width, NULL);
+ cols += width;
+ }
+
+ cmd_offset = (int) (s - cmdbuf);
+ save_cp = cp;
+ cmd_home();
+ cmd_repaint(save_cp);
+}
+
+/*
+ * Move cursor right one character.
+ */
+ static int
+cmd_right()
+{
+ char *pr;
+ char *ncp;
+ int width;
+
+ if (*cp == '\0')
+ {
+ /* Already at the end of the line. */
+ return (CC_OK);
+ }
+ ncp = cp;
+ pr = cmd_step_right(&ncp, &width, NULL);
+ if (cmd_col + width >= sc_width)
+ cmd_lshift();
+ else if (cmd_col + width == sc_width - 1 && cp[1] != '\0')
+ cmd_lshift();
+ cp = ncp;
+ cmd_col += width;
+ putstr(pr);
+ while (*cp != '\0')
+ {
+ pr = cmd_step_right(&ncp, &width, NULL);
+ if (width > 0)
+ break;
+ putstr(pr);
+ cp = ncp;
+ }
+ return (CC_OK);
+}
+
+/*
+ * Move cursor left one character.
+ */
+ static int
+cmd_left()
+{
+ char *ncp;
+ int width, bswidth;
+
+ if (cp <= cmdbuf)
+ {
+ /* Already at the beginning of the line */
+ return (CC_OK);
+ }
+ ncp = cp;
+ while (ncp > cmdbuf)
+ {
+ cmd_step_left(&ncp, &width, &bswidth);
+ if (width > 0)
+ break;
+ }
+ if (cmd_col < prompt_col + width)
+ cmd_rshift();
+ cp = ncp;
+ cmd_col -= width;
+ while (bswidth-- > 0)
+ putbs();
+ return (CC_OK);
+}
+
+/*
+ * Insert a char into the command buffer, at the current position.
+ */
+ static int
+cmd_ichar(cs, clen)
+ char *cs;
+ int clen;
+{
+ char *s;
+
+ if (strlen(cmdbuf) + clen >= sizeof(cmdbuf)-1)
+ {
+ /* No room in the command buffer for another char. */
+ bell();
+ return (CC_ERROR);
+ }
+
+ /*
+ * Make room for the new character (shift the tail of the buffer right).
+ */
+ for (s = &cmdbuf[strlen(cmdbuf)]; s >= cp; s--)
+ s[clen] = s[0];
+ /*
+ * Insert the character into the buffer.
+ */
+ for (s = cp; s < cp + clen; s++)
+ *s = *cs++;
+ /*
+ * Reprint the tail of the line from the inserted char.
+ */
+ updown_match = -1;
+ cmd_repaint(cp);
+ cmd_right();
+ return (CC_OK);
+}
+
+/*
+ * Backspace in the command buffer.
+ * Delete the char to the left of the cursor.
+ */
+ static int
+cmd_erase()
+{
+ register char *s;
+ int clen;
+
+ if (cp == cmdbuf)
+ {
+ /*
+ * Backspace past beginning of the buffer:
+ * this usually means abort the command.
+ */
+ return (CC_QUIT);
+ }
+ /*
+ * Move cursor left (to the char being erased).
+ */
+ s = cp;
+ cmd_left();
+ clen = (int) (s - cp);
+
+ /*
+ * Remove the char from the buffer (shift the buffer left).
+ */
+ for (s = cp; ; s++)
+ {
+ s[0] = s[clen];
+ if (s[0] == '\0')
+ break;
+ }
+
+ /*
+ * Repaint the buffer after the erased char.
+ */
+ updown_match = -1;
+ cmd_repaint(cp);
+
+ /*
+ * We say that erasing the entire command string causes us
+ * to abort the current command, if CF_QUIT_ON_ERASE is set.
+ */
+ if ((curr_cmdflags & CF_QUIT_ON_ERASE) && cp == cmdbuf && *cp == '\0')
+ return (CC_QUIT);
+ return (CC_OK);
+}
+
+/*
+ * Delete the char under the cursor.
+ */
+ static int
+cmd_delete()
+{
+ if (*cp == '\0')
+ {
+ /* At end of string; there is no char under the cursor. */
+ return (CC_OK);
+ }
+ /*
+ * Move right, then use cmd_erase.
+ */
+ cmd_right();
+ cmd_erase();
+ return (CC_OK);
+}
+
+/*
+ * Delete the "word" to the left of the cursor.
+ */
+ static int
+cmd_werase()
+{
+ if (cp > cmdbuf && cp[-1] == ' ')
+ {
+ /*
+ * If the char left of cursor is a space,
+ * erase all the spaces left of cursor (to the first non-space).
+ */
+ while (cp > cmdbuf && cp[-1] == ' ')
+ (void) cmd_erase();
+ } else
+ {
+ /*
+ * If the char left of cursor is not a space,
+ * erase all the nonspaces left of cursor (the whole "word").
+ */
+ while (cp > cmdbuf && cp[-1] != ' ')
+ (void) cmd_erase();
+ }
+ return (CC_OK);
+}
+
+/*
+ * Delete the "word" under the cursor.
+ */
+ static int
+cmd_wdelete()
+{
+ if (*cp == ' ')
+ {
+ /*
+ * If the char under the cursor is a space,
+ * delete it and all the spaces right of cursor.
+ */
+ while (*cp == ' ')
+ (void) cmd_delete();
+ } else
+ {
+ /*
+ * If the char under the cursor is not a space,
+ * delete it and all nonspaces right of cursor (the whole word).
+ */
+ while (*cp != ' ' && *cp != '\0')
+ (void) cmd_delete();
+ }
+ return (CC_OK);
+}
+
+/*
+ * Delete all chars in the command buffer.
+ */
+ static int
+cmd_kill()
+{
+ if (cmdbuf[0] == '\0')
+ {
+ /* Buffer is already empty; abort the current command. */
+ return (CC_QUIT);
+ }
+ cmd_offset = 0;
+ cmd_home();
+ *cp = '\0';
+ updown_match = -1;
+ cmd_repaint(cp);
+
+ /*
+ * We say that erasing the entire command string causes us
+ * to abort the current command, if CF_QUIT_ON_ERASE is set.
+ */
+ if (curr_cmdflags & CF_QUIT_ON_ERASE)
+ return (CC_QUIT);
+ return (CC_OK);
+}
+
+/*
+ * Select an mlist structure to be the current command history.
+ */
+ public void
+set_mlist(mlist, cmdflags)
+ void *mlist;
+ int cmdflags;
+{
+#if CMD_HISTORY
+ curr_mlist = (struct mlist *) mlist;
+ curr_cmdflags = cmdflags;
+
+ /* Make sure the next up-arrow moves to the last string in the mlist. */
+ if (curr_mlist != NULL)
+ curr_mlist->curr_mp = curr_mlist;
+#endif
+}
+
+#if CMD_HISTORY
+/*
+ * Move up or down in the currently selected command history list.
+ * Only consider entries whose first updown_match chars are equal to
+ * cmdbuf's corresponding chars.
+ */
+ static int
+cmd_updown(action)
+ int action;
+{
+ char *s;
+ struct mlist *ml;
+
+ if (curr_mlist == NULL)
+ {
+ /*
+ * The current command has no history list.
+ */
+ bell();
+ return (CC_OK);
+ }
+
+ if (updown_match < 0)
+ {
+ updown_match = (int) (cp - cmdbuf);
+ }
+
+ /*
+ * Find the next history entry which matches.
+ */
+ for (ml = curr_mlist->curr_mp;;)
+ {
+ ml = (action == EC_UP) ? ml->prev : ml->next;
+ if (ml == curr_mlist)
+ {
+ /*
+ * We reached the end (or beginning) of the list.
+ */
+ break;
+ }
+ if (strncmp(cmdbuf, ml->string, updown_match) == 0)
+ {
+ /*
+ * This entry matches; stop here.
+ * Copy the entry into cmdbuf and echo it on the screen.
+ */
+ curr_mlist->curr_mp = ml;
+ s = ml->string;
+ if (s == NULL)
+ s = "";
+ cmd_home();
+ clear_eol();
+ strcpy(cmdbuf, s);
+ for (cp = cmdbuf; *cp != '\0'; )
+ cmd_right();
+ return (CC_OK);
+ }
+ }
+ /*
+ * We didn't find a history entry that matches.
+ */
+ bell();
+ return (CC_OK);
+}
+#endif
+
+/*
+ * Add a string to an mlist.
+ */
+ public void
+cmd_addhist(mlist, cmd, modified)
+ struct mlist *mlist;
+ char *cmd;
+ int modified;
+{
+#if CMD_HISTORY
+ struct mlist *ml;
+
+ /*
+ * Don't save a trivial command.
+ */
+ if (strlen(cmd) == 0)
+ return;
+
+ /*
+ * Save the command unless it's a duplicate of the
+ * last command in the history.
+ */
+ ml = mlist->prev;
+ if (ml == mlist || strcmp(ml->string, cmd) != 0)
+ {
+ /*
+ * Did not find command in history.
+ * Save the command and put it at the end of the history list.
+ */
+ ml = (struct mlist *) ecalloc(1, sizeof(struct mlist));
+ ml->string = save(cmd);
+ ml->modified = modified;
+ ml->next = mlist;
+ ml->prev = mlist->prev;
+ mlist->prev->next = ml;
+ mlist->prev = ml;
+ }
+ /*
+ * Point to the cmd just after the just-accepted command.
+ * Thus, an UPARROW will always retrieve the previous command.
+ */
+ mlist->curr_mp = ml->next;
+#endif
+}
+
+/*
+ * Accept the command in the command buffer.
+ * Add it to the currently selected history list.
+ */
+ public void
+cmd_accept()
+{
+#if CMD_HISTORY
+ /*
+ * Nothing to do if there is no currently selected history list.
+ */
+ if (curr_mlist == NULL)
+ return;
+ cmd_addhist(curr_mlist, cmdbuf, 1);
+ curr_mlist->modified = 1;
+#endif
+}
+
+/*
+ * Try to perform a line-edit function on the command buffer,
+ * using a specified char as a line-editing command.
+ * Returns:
+ * CC_PASS The char does not invoke a line edit function.
+ * CC_OK Line edit function done.
+ * CC_QUIT The char requests the current command to be aborted.
+ */
+ static int
+cmd_edit(c)
+ int c;
+{
+ int action;
+ int flags;
+
+#if TAB_COMPLETE_FILENAME
+#define not_in_completion() in_completion = 0
+#else
+#define not_in_completion()
+#endif
+
+ /*
+ * See if the char is indeed a line-editing command.
+ */
+ flags = 0;
+#if CMD_HISTORY
+ if (curr_mlist == NULL)
+ /*
+ * No current history; don't accept history manipulation cmds.
+ */
+ flags |= EC_NOHISTORY;
+#endif
+#if TAB_COMPLETE_FILENAME
+ if (curr_mlist == ml_search)
+ /*
+ * In a search command; don't accept file-completion cmds.
+ */
+ flags |= EC_NOCOMPLETE;
+#endif
+
+ action = editchar(c, flags);
+
+ switch (action)
+ {
+ case EC_RIGHT:
+ not_in_completion();
+ return (cmd_right());
+ case EC_LEFT:
+ not_in_completion();
+ return (cmd_left());
+ case EC_W_RIGHT:
+ not_in_completion();
+ while (*cp != '\0' && *cp != ' ')
+ cmd_right();
+ while (*cp == ' ')
+ cmd_right();
+ return (CC_OK);
+ case EC_W_LEFT:
+ not_in_completion();
+ while (cp > cmdbuf && cp[-1] == ' ')
+ cmd_left();
+ while (cp > cmdbuf && cp[-1] != ' ')
+ cmd_left();
+ return (CC_OK);
+ case EC_HOME:
+ not_in_completion();
+ cmd_offset = 0;
+ cmd_home();
+ cmd_repaint(cp);
+ return (CC_OK);
+ case EC_END:
+ not_in_completion();
+ while (*cp != '\0')
+ cmd_right();
+ return (CC_OK);
+ case EC_INSERT:
+ not_in_completion();
+ return (CC_OK);
+ case EC_BACKSPACE:
+ not_in_completion();
+ return (cmd_erase());
+ case EC_LINEKILL:
+ not_in_completion();
+ return (cmd_kill());
+ case EC_ABORT:
+ not_in_completion();
+ (void) cmd_kill();
+ return (CC_QUIT);
+ case EC_W_BACKSPACE:
+ not_in_completion();
+ return (cmd_werase());
+ case EC_DELETE:
+ not_in_completion();
+ return (cmd_delete());
+ case EC_W_DELETE:
+ not_in_completion();
+ return (cmd_wdelete());
+ case EC_LITERAL:
+ literal = 1;
+ return (CC_OK);
+#if CMD_HISTORY
+ case EC_UP:
+ case EC_DOWN:
+ not_in_completion();
+ return (cmd_updown(action));
+#endif
+#if TAB_COMPLETE_FILENAME
+ case EC_F_COMPLETE:
+ case EC_B_COMPLETE:
+ case EC_EXPAND:
+ return (cmd_complete(action));
+#endif
+ case EC_NOACTION:
+ return (CC_OK);
+ default:
+ not_in_completion();
+ return (CC_PASS);
+ }
+}
+
+#if TAB_COMPLETE_FILENAME
+/*
+ * Insert a string into the command buffer, at the current position.
+ */
+ static int
+cmd_istr(str)
+ char *str;
+{
+ char *s;
+ int action;
+ char *endline = str + strlen(str);
+
+ for (s = str; *s != '\0'; )
+ {
+ char *os = s;
+ step_char(&s, +1, endline);
+ action = cmd_ichar(os, s - os);
+ if (action != CC_OK)
+ {
+ bell();
+ return (action);
+ }
+ }
+ return (CC_OK);
+}
+
+/*
+ * Find the beginning and end of the "current" word.
+ * This is the word which the cursor (cp) is inside or at the end of.
+ * Return pointer to the beginning of the word and put the
+ * cursor at the end of the word.
+ */
+ static char *
+delimit_word()
+{
+ char *word;
+#if SPACES_IN_FILENAMES
+ char *p;
+ int delim_quoted = 0;
+ int meta_quoted = 0;
+ char *esc = get_meta_escape();
+ int esclen = (int) strlen(esc);
+#endif
+
+ /*
+ * Move cursor to end of word.
+ */
+ if (*cp != ' ' && *cp != '\0')
+ {
+ /*
+ * Cursor is on a nonspace.
+ * Move cursor right to the next space.
+ */
+ while (*cp != ' ' && *cp != '\0')
+ cmd_right();
+ } else if (cp > cmdbuf && cp[-1] != ' ')
+ {
+ /*
+ * Cursor is on a space, and char to the left is a nonspace.
+ * We're already at the end of the word.
+ */
+ ;
+#if 0
+ } else
+ {
+ /*
+ * Cursor is on a space and char to the left is a space.
+ * Huh? There's no word here.
+ */
+ return (NULL);
+#endif
+ }
+ /*
+ * Find the beginning of the word which the cursor is in.
+ */
+ if (cp == cmdbuf)
+ return (NULL);
+#if SPACES_IN_FILENAMES
+ /*
+ * If we have an unbalanced quote (that is, an open quote
+ * without a corresponding close quote), we return everything
+ * from the open quote, including spaces.
+ */
+ for (word = cmdbuf; word < cp; word++)
+ if (*word != ' ')
+ break;
+ if (word >= cp)
+ return (cp);
+ for (p = cmdbuf; p < cp; p++)
+ {
+ if (meta_quoted)
+ {
+ meta_quoted = 0;
+ } else if (esclen > 0 && p + esclen < cp &&
+ strncmp(p, esc, esclen) == 0)
+ {
+ meta_quoted = 1;
+ p += esclen - 1;
+ } else if (delim_quoted)
+ {
+ if (*p == closequote)
+ delim_quoted = 0;
+ } else /* (!delim_quoted) */
+ {
+ if (*p == openquote)
+ delim_quoted = 1;
+ else if (*p == ' ')
+ word = p+1;
+ }
+ }
+#endif
+ return (word);
+}
+
+/*
+ * Set things up to enter completion mode.
+ * Expand the word under the cursor into a list of filenames
+ * which start with that word, and set tk_text to that list.
+ */
+ static void
+init_compl()
+{
+ char *word;
+ char c;
+
+ /*
+ * Get rid of any previous tk_text.
+ */
+ if (tk_text != NULL)
+ {
+ free(tk_text);
+ tk_text = NULL;
+ }
+ /*
+ * Find the original (uncompleted) word in the command buffer.
+ */
+ word = delimit_word();
+ if (word == NULL)
+ return;
+ /*
+ * Set the insertion point to the point in the command buffer
+ * where the original (uncompleted) word now sits.
+ */
+ tk_ipoint = word;
+ /*
+ * Save the original (uncompleted) word
+ */
+ if (tk_original != NULL)
+ free(tk_original);
+ tk_original = (char *) ecalloc(cp-word+1, sizeof(char));
+ strncpy(tk_original, word, cp-word);
+ /*
+ * Get the expanded filename.
+ * This may result in a single filename, or
+ * a blank-separated list of filenames.
+ */
+ c = *cp;
+ *cp = '\0';
+ if (*word != openquote)
+ {
+ tk_text = fcomplete(word);
+ } else
+ {
+#if MSDOS_COMPILER
+ char *qword = NULL;
+#else
+ char *qword = shell_quote(word+1);
+#endif
+ if (qword == NULL)
+ tk_text = fcomplete(word+1);
+ else
+ {
+ tk_text = fcomplete(qword);
+ free(qword);
+ }
+ }
+ *cp = c;
+}
+
+/*
+ * Return the next word in the current completion list.
+ */
+ static char *
+next_compl(action, prev)
+ int action;
+ char *prev;
+{
+ switch (action)
+ {
+ case EC_F_COMPLETE:
+ return (forw_textlist(&tk_tlist, prev));
+ case EC_B_COMPLETE:
+ return (back_textlist(&tk_tlist, prev));
+ }
+ /* Cannot happen */
+ return ("?");
+}
+
+/*
+ * Complete the filename before (or under) the cursor.
+ * cmd_complete may be called multiple times. The global in_completion
+ * remembers whether this call is the first time (create the list),
+ * or a subsequent time (step thru the list).
+ */
+ static int
+cmd_complete(action)
+ int action;
+{
+ char *s;
+
+ if (!in_completion || action == EC_EXPAND)
+ {
+ /*
+ * Expand the word under the cursor and
+ * use the first word in the expansion
+ * (or the entire expansion if we're doing EC_EXPAND).
+ */
+ init_compl();
+ if (tk_text == NULL)
+ {
+ bell();
+ return (CC_OK);
+ }
+ if (action == EC_EXPAND)
+ {
+ /*
+ * Use the whole list.
+ */
+ tk_trial = tk_text;
+ } else
+ {
+ /*
+ * Use the first filename in the list.
+ */
+ in_completion = 1;
+ init_textlist(&tk_tlist, tk_text);
+ tk_trial = next_compl(action, (char*)NULL);
+ }
+ } else
+ {
+ /*
+ * We already have a completion list.
+ * Use the next/previous filename from the list.
+ */
+ tk_trial = next_compl(action, tk_trial);
+ }
+
+ /*
+ * Remove the original word, or the previous trial completion.
+ */
+ while (cp > tk_ipoint)
+ (void) cmd_erase();
+
+ if (tk_trial == NULL)
+ {
+ /*
+ * There are no more trial completions.
+ * Insert the original (uncompleted) filename.
+ */
+ in_completion = 0;
+ if (cmd_istr(tk_original) != CC_OK)
+ goto fail;
+ } else
+ {
+ /*
+ * Insert trial completion.
+ */
+ if (cmd_istr(tk_trial) != CC_OK)
+ goto fail;
+ /*
+ * If it is a directory, append a slash.
+ */
+ if (is_dir(tk_trial))
+ {
+ if (cp > cmdbuf && cp[-1] == closequote)
+ (void) cmd_erase();
+ s = lgetenv("LESSSEPARATOR");
+ if (s == NULL)
+ s = PATHNAME_SEP;
+ if (cmd_istr(s) != CC_OK)
+ goto fail;
+ }
+ }
+
+ return (CC_OK);
+
+fail:
+ in_completion = 0;
+ bell();
+ return (CC_OK);
+}
+
+#endif /* TAB_COMPLETE_FILENAME */
+
+/*
+ * Process a single character of a multi-character command, such as
+ * a number, or the pattern of a search command.
+ * Returns:
+ * CC_OK The char was accepted.
+ * CC_QUIT The char requests the command to be aborted.
+ * CC_ERROR The char could not be accepted due to an error.
+ */
+ public int
+cmd_char(c)
+ int c;
+{
+ int action;
+ int len;
+
+ if (!utf_mode)
+ {
+ cmd_mbc_buf[0] = c;
+ len = 1;
+ } else
+ {
+ /* Perform strict validation in all possible cases. */
+ if (cmd_mbc_buf_len == 0)
+ {
+ retry:
+ cmd_mbc_buf_index = 1;
+ *cmd_mbc_buf = c;
+ if (IS_ASCII_OCTET(c))
+ cmd_mbc_buf_len = 1;
+ else if (IS_UTF8_LEAD(c))
+ {
+ cmd_mbc_buf_len = utf_len(c);
+ return (CC_OK);
+ } else
+ {
+ /* UTF8_INVALID or stray UTF8_TRAIL */
+ bell();
+ return (CC_ERROR);
+ }
+ } else if (IS_UTF8_TRAIL(c))
+ {
+ cmd_mbc_buf[cmd_mbc_buf_index++] = c;
+ if (cmd_mbc_buf_index < cmd_mbc_buf_len)
+ return (CC_OK);
+ if (!is_utf8_well_formed(cmd_mbc_buf, cmd_mbc_buf_index))
+ {
+ /* complete, but not well formed (non-shortest form), sequence */
+ cmd_mbc_buf_len = 0;
+ bell();
+ return (CC_ERROR);
+ }
+ } else
+ {
+ /* Flush incomplete (truncated) sequence. */
+ cmd_mbc_buf_len = 0;
+ bell();
+ /* Handle new char. */
+ goto retry;
+ }
+
+ len = cmd_mbc_buf_len;
+ cmd_mbc_buf_len = 0;
+ }
+
+ if (literal)
+ {
+ /*
+ * Insert the char, even if it is a line-editing char.
+ */
+ literal = 0;
+ return (cmd_ichar(cmd_mbc_buf, len));
+ }
+
+ /*
+ * See if it is a line-editing character.
+ */
+ if (in_mca() && len == 1)
+ {
+ action = cmd_edit(c);
+ switch (action)
+ {
+ case CC_OK:
+ case CC_QUIT:
+ return (action);
+ case CC_PASS:
+ break;
+ }
+ }
+
+ /*
+ * Insert the char into the command buffer.
+ */
+ return (cmd_ichar(cmd_mbc_buf, len));
+}
+
+/*
+ * Return the number currently in the command buffer.
+ */
+ public LINENUM
+cmd_int(frac)
+ long *frac;
+{
+ char *p;
+ LINENUM n = 0;
+ int err;
+
+ for (p = cmdbuf; *p >= '0' && *p <= '9'; p++)
+ n = (n * 10) + (*p - '0');
+ *frac = 0;
+ if (*p++ == '.')
+ {
+ *frac = getfraction(&p, NULL, &err);
+ /* {{ do something if err is set? }} */
+ }
+ return (n);
+}
+
+/*
+ * Return a pointer to the command buffer.
+ */
+ public char *
+get_cmdbuf()
+{
+ return (cmdbuf);
+}
+
+#if CMD_HISTORY
+/*
+ * Return the last (most recent) string in the current command history.
+ */
+ public char *
+cmd_lastpattern()
+{
+ if (curr_mlist == NULL)
+ return (NULL);
+ return (curr_mlist->curr_mp->prev->string);
+}
+#endif
+
+#if CMD_HISTORY
+/*
+ */
+ static int
+mlist_size(ml)
+ struct mlist *ml;
+{
+ int size = 0;
+ for (ml = ml->next; ml->string != NULL; ml = ml->next)
+ ++size;
+ return size;
+}
+
+/*
+ * Get the name of the history file.
+ */
+ static char *
+histfile_name()
+{
+ char *home;
+ char *name;
+ int len;
+
+ /* See if filename is explicitly specified by $LESSHISTFILE. */
+ name = lgetenv("LESSHISTFILE");
+ if (name != NULL && *name != '\0')
+ {
+ if (strcmp(name, "-") == 0 || strcmp(name, "/dev/null") == 0)
+ /* $LESSHISTFILE == "-" means don't use a history file. */
+ return (NULL);
+ return (save(name));
+ }
+
+ /* See if history file is disabled in the build. */
+ if (strcmp(LESSHISTFILE, "") == 0 || strcmp(LESSHISTFILE, "-") == 0)
+ return (NULL);
+
+ /* Otherwise, file is in $HOME. */
+ home = lgetenv("HOME");
+ if (home == NULL || *home == '\0')
+ {
+#if OS2
+ home = lgetenv("INIT");
+ if (home == NULL || *home == '\0')
+#endif
+ return (NULL);
+ }
+ len = (int) (strlen(home) + strlen(LESSHISTFILE) + 2);
+ name = (char *) ecalloc(len, sizeof(char));
+ SNPRINTF2(name, len, "%s/%s", home, LESSHISTFILE);
+ return (name);
+}
+
+/*
+ * Read a .lesshst file and call a callback for each line in the file.
+ */
+ static void
+read_cmdhist2(action, uparam, skip_search, skip_shell)
+ void (*action)(void*,struct mlist*,char*);
+ void *uparam;
+ int skip_search;
+ int skip_shell;
+{
+ struct mlist *ml = NULL;
+ char line[CMDBUF_SIZE];
+ char *filename;
+ FILE *f;
+ char *p;
+ int *skip = NULL;
+
+ filename = histfile_name();
+ if (filename == NULL)
+ return;
+ f = fopen(filename, "r");
+ free(filename);
+ if (f == NULL)
+ return;
+ if (fgets(line, sizeof(line), f) == NULL ||
+ strncmp(line, HISTFILE_FIRST_LINE, strlen(HISTFILE_FIRST_LINE)) != 0)
+ {
+ fclose(f);
+ return;
+ }
+ while (fgets(line, sizeof(line), f) != NULL)
+ {
+ for (p = line; *p != '\0'; p++)
+ {
+ if (*p == '\n' || *p == '\r')
+ {
+ *p = '\0';
+ break;
+ }
+ }
+ if (strcmp(line, HISTFILE_SEARCH_SECTION) == 0)
+ {
+ ml = &mlist_search;
+ skip = &skip_search;
+ } else if (strcmp(line, HISTFILE_SHELL_SECTION) == 0)
+ {
+#if SHELL_ESCAPE || PIPEC
+ ml = &mlist_shell;
+ skip = &skip_shell;
+#else
+ ml = NULL;
+ skip = NULL;
+#endif
+ } else if (*line == '"')
+ {
+ if (ml != NULL)
+ {
+ if (skip != NULL && *skip > 0)
+ --(*skip);
+ else
+ (*action)(uparam, ml, line+1);
+ }
+ }
+ }
+ fclose(f);
+}
+
+ static void
+read_cmdhist(action, uparam, skip_search, skip_shell)
+ void (*action)(void*,struct mlist*,char*);
+ void *uparam;
+ int skip_search;
+ int skip_shell;
+{
+ read_cmdhist2(action, uparam, skip_search, skip_shell);
+ (*action)(uparam, NULL, NULL); /* signal end of file */
+}
+
+ static void
+addhist_init(void *uparam, struct mlist *ml, char *string)
+{
+ if (ml == NULL || string == NULL)
+ return;
+ cmd_addhist(ml, string, 0);
+}
+#endif /* CMD_HISTORY */
+
+/*
+ * Initialize history from a .lesshist file.
+ */
+ public void
+init_cmdhist()
+{
+#if CMD_HISTORY
+ read_cmdhist(&addhist_init, NULL, 0, 0);
+#endif /* CMD_HISTORY */
+}
+
+/*
+ * Write the header for a section of the history file.
+ */
+#if CMD_HISTORY
+ static void
+write_mlist_header(ml, f)
+ struct mlist *ml;
+ FILE *f;
+{
+ if (ml == &mlist_search)
+ fprintf(f, "%s\n", HISTFILE_SEARCH_SECTION);
+#if SHELL_ESCAPE || PIPEC
+ else if (ml == &mlist_shell)
+ fprintf(f, "%s\n", HISTFILE_SHELL_SECTION);
+#endif
+}
+
+/*
+ * Write all modified entries in an mlist to the history file.
+ */
+ static void
+write_mlist(ml, f)
+ struct mlist *ml;
+ FILE *f;
+{
+ for (ml = ml->next; ml->string != NULL; ml = ml->next)
+ {
+ if (!ml->modified)
+ continue;
+ fprintf(f, "\"%s\n", ml->string);
+ ml->modified = 0;
+ }
+ ml->modified = 0; /* entire mlist is now unmodified */
+}
+
+/*
+ * Make a temp name in the same directory as filename.
+ */
+ static char *
+make_tempname(filename)
+ char *filename;
+{
+ char lastch;
+ char *tempname = ecalloc(1, strlen(filename)+1);
+ strcpy(tempname, filename);
+ lastch = tempname[strlen(tempname)-1];
+ tempname[strlen(tempname)-1] = (lastch == 'Q') ? 'Z' : 'Q';
+ return tempname;
+}
+
+struct save_ctx
+{
+ struct mlist *mlist;
+ FILE *fout;
+};
+
+/*
+ * Copy entries from the saved history file to a new file.
+ * At the end of each mlist, append any new entries
+ * created during this session.
+ */
+ static void
+copy_hist(void *uparam, struct mlist *ml, char *string)
+{
+ struct save_ctx *ctx = (struct save_ctx *) uparam;
+
+ if (ml != ctx->mlist) {
+ /* We're changing mlists. */
+ if (ctx->mlist)
+ /* Append any new entries to the end of the current mlist. */
+ write_mlist(ctx->mlist, ctx->fout);
+ /* Write the header for the new mlist. */
+ ctx->mlist = ml;
+ write_mlist_header(ctx->mlist, ctx->fout);
+ }
+ if (string != NULL)
+ {
+ /* Copy the entry. */
+ fprintf(ctx->fout, "\"%s\n", string);
+ }
+ if (ml == NULL) /* End of file */
+ {
+ /* Write any sections that were not in the original file. */
+ if (mlist_search.modified)
+ {
+ write_mlist_header(&mlist_search, ctx->fout);
+ write_mlist(&mlist_search, ctx->fout);
+ }
+#if SHELL_ESCAPE || PIPEC
+ if (mlist_shell.modified)
+ {
+ write_mlist_header(&mlist_shell, ctx->fout);
+ write_mlist(&mlist_shell, ctx->fout);
+ }
+#endif
+ }
+}
+#endif /* CMD_HISTORY */
+
+/*
+ * Make a file readable only by its owner.
+ */
+ static void
+make_file_private(f)
+ FILE *f;
+{
+#if HAVE_FCHMOD
+ int do_chmod = 1;
+#if HAVE_STAT
+ struct stat statbuf;
+ int r = fstat(fileno(f), &statbuf);
+ if (r < 0 || !S_ISREG(statbuf.st_mode))
+ /* Don't chmod if not a regular file. */
+ do_chmod = 0;
+#endif
+ if (do_chmod)
+ fchmod(fileno(f), 0600);
+#endif
+}
+
+/*
+ * Does the history file need to be updated?
+ */
+ static int
+histfile_modified()
+{
+ if (mlist_search.modified)
+ return 1;
+#if SHELL_ESCAPE || PIPEC
+ if (mlist_shell.modified)
+ return 1;
+#endif
+ return 0;
+}
+
+/*
+ * Update the .lesshst file.
+ */
+ public void
+save_cmdhist()
+{
+#if CMD_HISTORY
+ char *histname;
+ char *tempname;
+ int skip_search;
+ int skip_shell;
+ struct save_ctx ctx;
+ char *s;
+ FILE *fout = NULL;
+ int histsize = 0;
+
+ if (!histfile_modified())
+ return;
+ histname = histfile_name();
+ if (histname == NULL)
+ return;
+ tempname = make_tempname(histname);
+ fout = fopen(tempname, "w");
+ if (fout != NULL)
+ {
+ make_file_private(fout);
+ s = lgetenv("LESSHISTSIZE");
+ if (s != NULL)
+ histsize = atoi(s);
+ if (histsize <= 0)
+ histsize = 100;
+ skip_search = mlist_size(&mlist_search) - histsize;
+#if SHELL_ESCAPE || PIPEC
+ skip_shell = mlist_size(&mlist_shell) - histsize;
+#endif
+ fprintf(fout, "%s\n", HISTFILE_FIRST_LINE);
+ ctx.fout = fout;
+ ctx.mlist = NULL;
+ read_cmdhist(copy_hist, &ctx, skip_search, skip_shell);
+ fclose(fout);
+#if MSDOS_COMPILER==WIN32C
+ /*
+ * Windows rename doesn't remove an existing file,
+ * making it useless for atomic operations. Sigh.
+ */
+ remove(histname);
+#endif
+ rename(tempname, histname);
+ }
+ free(tempname);
+ free(histname);
+#endif /* CMD_HISTORY */
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * User-level command processor.
+ */
+
+#include "less.h"
+#if MSDOS_COMPILER==WIN32C
+#include <windows.h>
+#endif
+#include "position.h"
+#include "option.h"
+#include "cmd.h"
+
+extern int erase_char, erase2_char, kill_char;
+extern int sigs;
+extern int quit_if_one_screen;
+extern int squished;
+extern int sc_width;
+extern int sc_height;
+extern int swindow;
+extern int jump_sline;
+extern int quitting;
+extern int wscroll;
+extern int top_scroll;
+extern int ignore_eoi;
+extern int secure;
+extern int hshift;
+extern int bs_mode;
+extern int show_attn;
+extern POSITION highest_hilite;
+extern char *every_first_cmd;
+extern char *curr_altfilename;
+extern char version[];
+extern struct scrpos initial_scrpos;
+extern IFILE curr_ifile;
+extern void constant *ml_search;
+extern void constant *ml_examine;
+#if SHELL_ESCAPE || PIPEC
+extern void constant *ml_shell;
+#endif
+#if EDITOR
+extern char *editor;
+extern char *editproto;
+#endif
+extern int screen_trashed; /* The screen has been overwritten */
+extern int shift_count;
+extern int oldbot;
+extern int forw_prompt;
+extern int same_pos_bell;
+
+#if SHELL_ESCAPE
+static char *shellcmd = NULL; /* For holding last shell command for "!!" */
+#endif
+static int mca; /* The multicharacter command (action) */
+static int search_type; /* The previous type of search */
+static LINENUM number; /* The number typed by the user */
+static long fraction; /* The fractional part of the number */
+static struct loption *curropt;
+static int opt_lower;
+static int optflag;
+static int optgetname;
+static POSITION bottompos;
+static int save_hshift;
+static int save_bs_mode;
+#if PIPEC
+static char pipec;
+#endif
+
+struct ungot {
+ struct ungot *ug_next;
+ char ug_char;
+ char ug_end_command;
+};
+static struct ungot* ungot = NULL;
+
+static void multi_search();
+
+/*
+ * Move the cursor to start of prompt line before executing a command.
+ * This looks nicer if the command takes a long time before
+ * updating the screen.
+ */
+ static void
+cmd_exec()
+{
+#if HILITE_SEARCH
+ clear_attn();
+#endif
+ clear_bot();
+ flush();
+}
+
+/*
+ * Set up the display to start a new multi-character command.
+ */
+ static void
+start_mca(action, prompt, mlist, cmdflags)
+ int action;
+ constant char *prompt;
+ constant void *mlist;
+ int cmdflags;
+{
+ mca = action;
+ clear_bot();
+ clear_cmd();
+ cmd_putstr(prompt);
+ set_mlist(mlist, cmdflags);
+}
+
+ public int
+in_mca()
+{
+ return (mca != 0 && mca != A_PREFIX);
+}
+
+/*
+ * Set up the display to start a new search command.
+ */
+ static void
+mca_search()
+{
+#if HILITE_SEARCH
+ if (search_type & SRCH_FILTER)
+ mca = A_FILTER;
+ else
+#endif
+ if (search_type & SRCH_FORW)
+ mca = A_F_SEARCH;
+ else
+ mca = A_B_SEARCH;
+
+ clear_bot();
+ clear_cmd();
+
+ if (search_type & SRCH_NO_MATCH)
+ cmd_putstr("Non-match ");
+ if (search_type & SRCH_FIRST_FILE)
+ cmd_putstr("First-file ");
+ if (search_type & SRCH_PAST_EOF)
+ cmd_putstr("EOF-ignore ");
+ if (search_type & SRCH_NO_MOVE)
+ cmd_putstr("Keep-pos ");
+ if (search_type & SRCH_NO_REGEX)
+ cmd_putstr("Regex-off ");
+
+#if HILITE_SEARCH
+ if (search_type & SRCH_FILTER)
+ cmd_putstr("&/");
+ else
+#endif
+ if (search_type & SRCH_FORW)
+ cmd_putstr("/");
+ else
+ cmd_putstr("?");
+ forw_prompt = 0;
+ set_mlist(ml_search, 0);
+}
+
+/*
+ * Set up the display to start a new toggle-option command.
+ */
+ static void
+mca_opt_toggle()
+{
+ int no_prompt;
+ int flag;
+ char *dash;
+
+ no_prompt = (optflag & OPT_NO_PROMPT);
+ flag = (optflag & ~OPT_NO_PROMPT);
+ dash = (flag == OPT_NO_TOGGLE) ? "_" : "-";
+
+ mca = A_OPT_TOGGLE;
+ clear_bot();
+ clear_cmd();
+ cmd_putstr(dash);
+ if (optgetname)
+ cmd_putstr(dash);
+ if (no_prompt)
+ cmd_putstr("(P)");
+ switch (flag)
+ {
+ case OPT_UNSET:
+ cmd_putstr("+");
+ break;
+ case OPT_SET:
+ cmd_putstr("!");
+ break;
+ }
+ forw_prompt = 0;
+ set_mlist(NULL, 0);
+}
+
+/*
+ * Execute a multicharacter command.
+ */
+ static void
+exec_mca()
+{
+ register char *cbuf;
+
+ cmd_exec();
+ cbuf = get_cmdbuf();
+
+ switch (mca)
+ {
+ case A_F_SEARCH:
+ case A_B_SEARCH:
+ multi_search(cbuf, (int) number, 0);
+ break;
+#if HILITE_SEARCH
+ case A_FILTER:
+ search_type ^= SRCH_NO_MATCH;
+ set_filter_pattern(cbuf, search_type);
+ break;
+#endif
+ case A_FIRSTCMD:
+ /*
+ * Skip leading spaces or + signs in the string.
+ */
+ while (*cbuf == '+' || *cbuf == ' ')
+ cbuf++;
+ if (every_first_cmd != NULL)
+ free(every_first_cmd);
+ if (*cbuf == '\0')
+ every_first_cmd = NULL;
+ else
+ every_first_cmd = save(cbuf);
+ break;
+ case A_OPT_TOGGLE:
+ toggle_option(curropt, opt_lower, cbuf, optflag);
+ curropt = NULL;
+ break;
+ case A_F_BRACKET:
+ match_brac(cbuf[0], cbuf[1], 1, (int) number);
+ break;
+ case A_B_BRACKET:
+ match_brac(cbuf[1], cbuf[0], 0, (int) number);
+ break;
+#if EXAMINE
+ case A_EXAMINE:
+ if (secure)
+ break;
+ edit_list(cbuf);
+#if TAGS
+ /* If tag structure is loaded then clean it up. */
+ cleantags();
+#endif
+ break;
+#endif
+#if SHELL_ESCAPE
+ case A_SHELL:
+ /*
+ * !! just uses whatever is in shellcmd.
+ * Otherwise, copy cmdbuf to shellcmd,
+ * expanding any special characters ("%" or "#").
+ */
+ if (*cbuf != '!')
+ {
+ if (shellcmd != NULL)
+ free(shellcmd);
+ shellcmd = fexpand(cbuf);
+ }
+
+ if (secure)
+ break;
+ if (shellcmd == NULL)
+ lsystem("", "!done");
+ else
+ lsystem(shellcmd, "!done");
+ break;
+#endif
+#if PIPEC
+ case A_PIPE:
+ if (secure)
+ break;
+ (void) pipe_mark(pipec, cbuf);
+ error("|done", NULL_PARG);
+ break;
+#endif
+ }
+}
+
+/*
+ * Is a character an erase or kill char?
+ */
+ static int
+is_erase_char(c)
+ int c;
+{
+ return (c == erase_char || c == erase2_char || c == kill_char);
+}
+
+/*
+ * Handle the first char of an option (after the initial dash).
+ */
+ static int
+mca_opt_first_char(c)
+ int c;
+{
+ int flag = (optflag & ~OPT_NO_PROMPT);
+ if (flag == OPT_NO_TOGGLE)
+ {
+ switch (c)
+ {
+ case '_':
+ /* "__" = long option name. */
+ optgetname = TRUE;
+ mca_opt_toggle();
+ return (MCA_MORE);
+ }
+ } else
+ {
+ switch (c)
+ {
+ case '+':
+ /* "-+" = UNSET. */
+ optflag = (flag == OPT_UNSET) ?
+ OPT_TOGGLE : OPT_UNSET;
+ mca_opt_toggle();
+ return (MCA_MORE);
+ case '!':
+ /* "-!" = SET */
+ optflag = (flag == OPT_SET) ?
+ OPT_TOGGLE : OPT_SET;
+ mca_opt_toggle();
+ return (MCA_MORE);
+ case CONTROL('P'):
+ optflag ^= OPT_NO_PROMPT;
+ mca_opt_toggle();
+ return (MCA_MORE);
+ case '-':
+ /* "--" = long option name. */
+ optgetname = TRUE;
+ mca_opt_toggle();
+ return (MCA_MORE);
+ }
+ }
+ /* Char was not handled here. */
+ return (NO_MCA);
+}
+
+/*
+ * Add a char to a long option name.
+ * See if we've got a match for an option name yet.
+ * If so, display the complete name and stop
+ * accepting chars until user hits RETURN.
+ */
+ static int
+mca_opt_nonfirst_char(c)
+ int c;
+{
+ char *p;
+ char *oname;
+
+ if (curropt != NULL)
+ {
+ /*
+ * Already have a match for the name.
+ * Don't accept anything but erase/kill.
+ */
+ if (is_erase_char(c))
+ return (MCA_DONE);
+ return (MCA_MORE);
+ }
+ /*
+ * Add char to cmd buffer and try to match
+ * the option name.
+ */
+ if (cmd_char(c) == CC_QUIT)
+ return (MCA_DONE);
+ p = get_cmdbuf();
+ opt_lower = ASCII_IS_LOWER(p[0]);
+ curropt = findopt_name(&p, &oname, NULL);
+ if (curropt != NULL)
+ {
+ /*
+ * Got a match.
+ * Remember the option and
+ * display the full option name.
+ */
+ cmd_reset();
+ mca_opt_toggle();
+ for (p = oname; *p != '\0'; p++)
+ {
+ c = *p;
+ if (!opt_lower && ASCII_IS_LOWER(c))
+ c = ASCII_TO_UPPER(c);
+ if (cmd_char(c) != CC_OK)
+ return (MCA_DONE);
+ }
+ }
+ return (MCA_MORE);
+}
+
+/*
+ * Handle a char of an option toggle command.
+ */
+ static int
+mca_opt_char(c)
+ int c;
+{
+ PARG parg;
+
+ /*
+ * This may be a short option (single char),
+ * or one char of a long option name,
+ * or one char of the option parameter.
+ */
+ if (curropt == NULL && len_cmdbuf() == 0)
+ {
+ int ret = mca_opt_first_char(c);
+ if (ret != NO_MCA)
+ return (ret);
+ }
+ if (optgetname)
+ {
+ /* We're getting a long option name. */
+ if (c != '\n' && c != '\r')
+ return (mca_opt_nonfirst_char(c));
+ if (curropt == NULL)
+ {
+ parg.p_string = get_cmdbuf();
+ error("There is no --%s option", &parg);
+ return (MCA_DONE);
+ }
+ optgetname = FALSE;
+ cmd_reset();
+ } else
+ {
+ if (is_erase_char(c))
+ return (NO_MCA);
+ if (curropt != NULL)
+ /* We're getting the option parameter. */
+ return (NO_MCA);
+ curropt = findopt(c);
+ if (curropt == NULL)
+ {
+ parg.p_string = propt(c);
+ error("There is no %s option", &parg);
+ return (MCA_DONE);
+ }
+ }
+ /*
+ * If the option which was entered does not take a
+ * parameter, toggle the option immediately,
+ * so user doesn't have to hit RETURN.
+ */
+ if ((optflag & ~OPT_NO_PROMPT) != OPT_TOGGLE ||
+ !opt_has_param(curropt))
+ {
+ toggle_option(curropt, ASCII_IS_LOWER(c), "", optflag);
+ return (MCA_DONE);
+ }
+ /*
+ * Display a prompt appropriate for the option parameter.
+ */
+ start_mca(A_OPT_TOGGLE, opt_prompt(curropt), (void*)NULL, 0);
+ return (MCA_MORE);
+}
+
+/*
+ * Handle a char of a search command.
+ */
+ static int
+mca_search_char(c)
+ int c;
+{
+ int flag = 0;
+
+ /*
+ * Certain characters as the first char of
+ * the pattern have special meaning:
+ * ! Toggle the NO_MATCH flag
+ * * Toggle the PAST_EOF flag
+ * @ Toggle the FIRST_FILE flag
+ */
+ if (len_cmdbuf() > 0)
+ return (NO_MCA);
+
+ switch (c)
+ {
+ case CONTROL('E'): /* ignore END of file */
+ case '*':
+ if (mca != A_FILTER)
+ flag = SRCH_PAST_EOF;
+ break;
+ case CONTROL('F'): /* FIRST file */
+ case '@':
+ if (mca != A_FILTER)
+ flag = SRCH_FIRST_FILE;
+ break;
+ case CONTROL('K'): /* KEEP position */
+ if (mca != A_FILTER)
+ flag = SRCH_NO_MOVE;
+ break;
+ case CONTROL('R'): /* Don't use REGULAR EXPRESSIONS */
+ flag = SRCH_NO_REGEX;
+ break;
+ case CONTROL('N'): /* NOT match */
+ case '!':
+ flag = SRCH_NO_MATCH;
+ break;
+ }
+
+ if (flag != 0)
+ {
+ search_type ^= flag;
+ mca_search();
+ return (MCA_MORE);
+ }
+ return (NO_MCA);
+}
+
+/*
+ * Handle a character of a multi-character command.
+ */
+ static int
+mca_char(c)
+ int c;
+{
+ int ret;
+
+ switch (mca)
+ {
+ case 0:
+ /*
+ * We're not in a multicharacter command.
+ */
+ return (NO_MCA);
+
+ case A_PREFIX:
+ /*
+ * In the prefix of a command.
+ * This not considered a multichar command
+ * (even tho it uses cmdbuf, etc.).
+ * It is handled in the commands() switch.
+ */
+ return (NO_MCA);
+
+ case A_DIGIT:
+ /*
+ * Entering digits of a number.
+ * Terminated by a non-digit.
+ */
+ if (!((c >= '0' && c <= '9') || c == '.') &&
+ editchar(c, EC_PEEK|EC_NOHISTORY|EC_NOCOMPLETE|EC_NORIGHTLEFT) == A_INVALID)
+ {
+ /*
+ * Not part of the number.
+ * End the number and treat this char
+ * as a normal command character.
+ */
+ number = cmd_int(&fraction);
+ mca = 0;
+ cmd_accept();
+ return (NO_MCA);
+ }
+ break;
+
+ case A_OPT_TOGGLE:
+ ret = mca_opt_char(c);
+ if (ret != NO_MCA)
+ return (ret);
+ break;
+
+ case A_F_SEARCH:
+ case A_B_SEARCH:
+ case A_FILTER:
+ ret = mca_search_char(c);
+ if (ret != NO_MCA)
+ return (ret);
+ break;
+
+ default:
+ /* Other multicharacter command. */
+ break;
+ }
+
+ /*
+ * The multichar command is terminated by a newline.
+ */
+ if (c == '\n' || c == '\r')
+ {
+ /*
+ * Execute the command.
+ */
+ exec_mca();
+ return (MCA_DONE);
+ }
+
+ /*
+ * Append the char to the command buffer.
+ */
+ if (cmd_char(c) == CC_QUIT)
+ /*
+ * Abort the multi-char command.
+ */
+ return (MCA_DONE);
+
+ if ((mca == A_F_BRACKET || mca == A_B_BRACKET) && len_cmdbuf() >= 2)
+ {
+ /*
+ * Special case for the bracket-matching commands.
+ * Execute the command after getting exactly two
+ * characters from the user.
+ */
+ exec_mca();
+ return (MCA_DONE);
+ }
+
+ /*
+ * Need another character.
+ */
+ return (MCA_MORE);
+}
+
+/*
+ * Discard any buffered file data.
+ */
+ static void
+clear_buffers()
+{
+ if (!(ch_getflags() & CH_CANSEEK))
+ return;
+ ch_flush();
+ clr_linenum();
+#if HILITE_SEARCH
+ clr_hilite();
+#endif
+}
+
+/*
+ * Make sure the screen is displayed.
+ */
+ static void
+make_display()
+{
+ /*
+ * If nothing is displayed yet, display starting from initial_scrpos.
+ */
+ if (empty_screen())
+ {
+ if (initial_scrpos.pos == NULL_POSITION)
+ /*
+ * {{ Maybe this should be:
+ * jump_loc(ch_zero(), jump_sline);
+ * but this behavior seems rather unexpected
+ * on the first screen. }}
+ */
+ jump_loc(ch_zero(), 1);
+ else
+ jump_loc(initial_scrpos.pos, initial_scrpos.ln);
+ } else if (screen_trashed)
+ {
+ int save_top_scroll = top_scroll;
+ int save_ignore_eoi = ignore_eoi;
+ top_scroll = 1;
+ ignore_eoi = 0;
+ if (screen_trashed == 2)
+ {
+ /* Special case used by ignore_eoi: re-open the input file
+ * and jump to the end of the file. */
+ reopen_curr_ifile();
+ jump_forw();
+ }
+ repaint();
+ top_scroll = save_top_scroll;
+ ignore_eoi = save_ignore_eoi;
+ }
+}
+
+/*
+ * Display the appropriate prompt.
+ */
+ static void
+prompt()
+{
+ register constant char *p;
+
+ if (ungot != NULL && !ungot->ug_end_command)
+ {
+ /*
+ * No prompt necessary if commands are from
+ * ungotten chars rather than from the user.
+ */
+ return;
+ }
+
+ /*
+ * Make sure the screen is displayed.
+ */
+ make_display();
+ bottompos = position(BOTTOM_PLUS_ONE);
+
+ /*
+ * If we've hit EOF on the last file and the -E flag is set, quit.
+ */
+ if (get_quit_at_eof() == OPT_ONPLUS &&
+ eof_displayed() && !(ch_getflags() & CH_HELPFILE) &&
+ next_ifile(curr_ifile) == NULL_IFILE)
+ quit(QUIT_OK);
+
+ /*
+ * If the entire file is displayed and the -F flag is set, quit.
+ */
+ if (quit_if_one_screen &&
+ entire_file_displayed() && !(ch_getflags() & CH_HELPFILE) &&
+ next_ifile(curr_ifile) == NULL_IFILE)
+ quit(QUIT_OK);
+
+#if MSDOS_COMPILER==WIN32C
+ /*
+ * In Win32, display the file name in the window title.
+ */
+ if (!(ch_getflags() & CH_HELPFILE))
+ SetConsoleTitle(pr_expand("Less?f - %f.", 0));
+#endif
+ /*
+ * Select the proper prompt and display it.
+ */
+ /*
+ * If the previous action was a forward movement,
+ * don't clear the bottom line of the display;
+ * just print the prompt since the forward movement guarantees
+ * that we're in the right position to display the prompt.
+ * Clearing the line could cause a problem: for example, if the last
+ * line displayed ended at the right screen edge without a newline,
+ * then clearing would clear the last displayed line rather than
+ * the prompt line.
+ */
+ if (!forw_prompt)
+ clear_bot();
+ clear_cmd();
+ forw_prompt = 0;
+ p = pr_string();
+ if (is_filtering())
+ putstr("& ");
+ if (p == NULL || *p == '\0')
+ putchr(':');
+ else
+ {
+ at_enter(AT_STANDOUT);
+ putstr(p);
+ at_exit();
+ }
+ clear_eol();
+}
+
+/*
+ * Display the less version message.
+ */
+ public void
+dispversion()
+{
+ PARG parg;
+
+ parg.p_string = version;
+ error("less %s", &parg);
+}
+
+/*
+ * Get command character.
+ * The character normally comes from the keyboard,
+ * but may come from ungotten characters
+ * (characters previously given to ungetcc or ungetsc).
+ */
+ public int
+getcc()
+{
+ if (ungot == NULL)
+ {
+ /*
+ * Normal case: no ungotten chars, so get one from the user.
+ */
+ return (getchr());
+ }
+
+ /*
+ * Return the next ungotten char.
+ */
+ {
+ struct ungot *ug = ungot;
+ char c = ug->ug_char;
+ int end_command = ug->ug_end_command;
+ ungot = ug->ug_next;
+ free(ug);
+ if (end_command)
+ {
+ /*
+ * Command is incomplete, so try to complete it.
+ */
+ switch (mca)
+ {
+ case A_DIGIT:
+ /*
+ * We have a number but no command. Treat as #g.
+ */
+ return ('g');
+
+ case A_F_SEARCH:
+ case A_B_SEARCH:
+ /*
+ * We have "/string" but no newline. Add the \n.
+ */
+ return ('\n');
+
+ default:
+ /*
+ * Some other incomplete command. Let user complete it.
+ */
+ return (getchr());
+ }
+ }
+ return (c);
+ }
+}
+
+/*
+ * "Unget" a command character.
+ * The next getcc() will return this character.
+ */
+ public void
+ungetcc(c)
+ int c;
+{
+ struct ungot *ug = (struct ungot *) ecalloc(1, sizeof(struct ungot));
+
+ ug->ug_char = (char) c;
+ ug->ug_end_command = (c == CHAR_END_COMMAND);
+ ug->ug_next = ungot;
+ ungot = ug;
+}
+
+/*
+ * Unget a whole string of command characters.
+ * The next sequence of getcc()'s will return this string.
+ */
+ public void
+ungetsc(s)
+ char *s;
+{
+ register char *p;
+
+ for (p = s + strlen(s) - 1; p >= s; p--)
+ ungetcc(*p);
+}
+
+/*
+ * Search for a pattern, possibly in multiple files.
+ * If SRCH_FIRST_FILE is set, begin searching at the first file.
+ * If SRCH_PAST_EOF is set, continue the search thru multiple files.
+ */
+ static void
+multi_search(pattern, n, silent)
+ char *pattern;
+ int n;
+ int silent;
+{
+ register int nomore;
+ IFILE save_ifile;
+ int changed_file;
+
+ changed_file = 0;
+ save_ifile = save_curr_ifile();
+
+ if (search_type & SRCH_FIRST_FILE)
+ {
+ /*
+ * Start at the first (or last) file
+ * in the command line list.
+ */
+ if (search_type & SRCH_FORW)
+ nomore = edit_first();
+ else
+ nomore = edit_last();
+ if (nomore)
+ {
+ unsave_ifile(save_ifile);
+ return;
+ }
+ changed_file = 1;
+ search_type &= ~SRCH_FIRST_FILE;
+ }
+
+ for (;;)
+ {
+ n = search(search_type, pattern, n);
+ /*
+ * The SRCH_NO_MOVE flag doesn't "stick": it gets cleared
+ * after being used once. This allows "n" to work after
+ * using a /@@ search.
+ */
+ search_type &= ~SRCH_NO_MOVE;
+ if (n == 0)
+ {
+ /*
+ * Found it.
+ */
+ unsave_ifile(save_ifile);
+ return;
+ }
+
+ if (n < 0)
+ /*
+ * Some kind of error in the search.
+ * Error message has been printed by search().
+ */
+ break;
+
+ if ((search_type & SRCH_PAST_EOF) == 0)
+ /*
+ * We didn't find a match, but we're
+ * supposed to search only one file.
+ */
+ break;
+ /*
+ * Move on to the next file.
+ */
+ if (search_type & SRCH_FORW)
+ nomore = edit_next(1);
+ else
+ nomore = edit_prev(1);
+ if (nomore)
+ break;
+ changed_file = 1;
+ }
+
+ /*
+ * Didn't find it.
+ * Print an error message if we haven't already.
+ */
+ if (n > 0 && !silent)
+ error("Pattern not found", NULL_PARG);
+
+ if (changed_file)
+ {
+ /*
+ * Restore the file we were originally viewing.
+ */
+ reedit_ifile(save_ifile);
+ } else
+ {
+ unsave_ifile(save_ifile);
+ }
+}
+
+/*
+ * Forward forever, or until a highlighted line appears.
+ */
+ static int
+forw_loop(until_hilite)
+ int until_hilite;
+{
+ POSITION curr_len;
+
+ if (ch_getflags() & CH_HELPFILE)
+ return (A_NOACTION);
+
+ cmd_exec();
+ jump_forw_buffered();
+ curr_len = ch_length();
+ highest_hilite = until_hilite ? curr_len : NULL_POSITION;
+ ignore_eoi = 1;
+ while (!sigs)
+ {
+ if (until_hilite && highest_hilite > curr_len)
+ {
+ bell();
+ break;
+ }
+ make_display();
+ forward(1, 0, 0);
+ }
+ ignore_eoi = 0;
+ ch_set_eof();
+
+ /*
+ * This gets us back in "F mode" after processing
+ * a non-abort signal (e.g. window-change).
+ */
+ if (sigs && !ABORT_SIGS())
+ return (until_hilite ? A_F_UNTIL_HILITE : A_F_FOREVER);
+
+ return (A_NOACTION);
+}
+
+/*
+ * Main command processor.
+ * Accept and execute commands until a quit command.
+ */
+ public void
+commands()
+{
+ register int c;
+ register int action;
+ register char *cbuf;
+ int newaction;
+ int save_search_type;
+ char *extra;
+ char tbuf[2];
+ PARG parg;
+ IFILE old_ifile;
+ IFILE new_ifile;
+ char *tagfile;
+
+ search_type = SRCH_FORW;
+ wscroll = (sc_height + 1) / 2;
+ newaction = A_NOACTION;
+
+ for (;;)
+ {
+ mca = 0;
+ cmd_accept();
+ number = 0;
+ curropt = NULL;
+
+ /*
+ * See if any signals need processing.
+ */
+ if (sigs)
+ {
+ psignals();
+ if (quitting)
+ quit(QUIT_SAVED_STATUS);
+ }
+
+ /*
+ * See if window size changed, for systems that don't
+ * generate SIGWINCH.
+ */
+ check_winch();
+
+ /*
+ * Display prompt and accept a character.
+ */
+ cmd_reset();
+ prompt();
+ if (sigs)
+ continue;
+ if (newaction == A_NOACTION)
+ c = getcc();
+
+ again:
+ if (sigs)
+ continue;
+
+ if (newaction != A_NOACTION)
+ {
+ action = newaction;
+ newaction = A_NOACTION;
+ } else
+ {
+ /*
+ * If we are in a multicharacter command, call mca_char.
+ * Otherwise we call fcmd_decode to determine the
+ * action to be performed.
+ */
+ if (mca)
+ switch (mca_char(c))
+ {
+ case MCA_MORE:
+ /*
+ * Need another character.
+ */
+ c = getcc();
+ goto again;
+ case MCA_DONE:
+ /*
+ * Command has been handled by mca_char.
+ * Start clean with a prompt.
+ */
+ continue;
+ case NO_MCA:
+ /*
+ * Not a multi-char command
+ * (at least, not anymore).
+ */
+ break;
+ }
+
+ /*
+ * Decode the command character and decide what to do.
+ */
+ if (mca)
+ {
+ /*
+ * We're in a multichar command.
+ * Add the character to the command buffer
+ * and display it on the screen.
+ * If the user backspaces past the start
+ * of the line, abort the command.
+ */
+ if (cmd_char(c) == CC_QUIT || len_cmdbuf() == 0)
+ continue;
+ cbuf = get_cmdbuf();
+ } else
+ {
+ /*
+ * Don't use cmd_char if we're starting fresh
+ * at the beginning of a command, because we
+ * don't want to echo the command until we know
+ * it is a multichar command. We also don't
+ * want erase_char/kill_char to be treated
+ * as line editing characters.
+ */
+ tbuf[0] = c;
+ tbuf[1] = '\0';
+ cbuf = tbuf;
+ }
+ extra = NULL;
+ action = fcmd_decode(cbuf, &extra);
+ /*
+ * If an "extra" string was returned,
+ * process it as a string of command characters.
+ */
+ if (extra != NULL)
+ ungetsc(extra);
+ }
+ /*
+ * Clear the cmdbuf string.
+ * (But not if we're in the prefix of a command,
+ * because the partial command string is kept there.)
+ */
+ if (action != A_PREFIX)
+ cmd_reset();
+
+ switch (action)
+ {
+ case A_DIGIT:
+ /*
+ * First digit of a number.
+ */
+ start_mca(A_DIGIT, ":", (void*)NULL, CF_QUIT_ON_ERASE);
+ goto again;
+
+ case A_F_WINDOW:
+ /*
+ * Forward one window (and set the window size).
+ */
+ if (number > 0)
+ swindow = (int) number;
+ /* FALLTHRU */
+ case A_F_SCREEN:
+ /*
+ * Forward one screen.
+ */
+ if (number <= 0)
+ number = get_swindow();
+ cmd_exec();
+ if (show_attn)
+ set_attnpos(bottompos);
+ forward((int) number, 0, 1);
+ break;
+
+ case A_B_WINDOW:
+ /*
+ * Backward one window (and set the window size).
+ */
+ if (number > 0)
+ swindow = (int) number;
+ /* FALLTHRU */
+ case A_B_SCREEN:
+ /*
+ * Backward one screen.
+ */
+ if (number <= 0)
+ number = get_swindow();
+ cmd_exec();
+ backward((int) number, 0, 1);
+ break;
+
+ case A_F_LINE:
+ /*
+ * Forward N (default 1) line.
+ */
+ if (number <= 0)
+ number = 1;
+ cmd_exec();
+ if (show_attn == OPT_ONPLUS && number > 1)
+ set_attnpos(bottompos);
+ forward((int) number, 0, 0);
+ break;
+
+ case A_B_LINE:
+ /*
+ * Backward N (default 1) line.
+ */
+ if (number <= 0)
+ number = 1;
+ cmd_exec();
+ backward((int) number, 0, 0);
+ break;
+
+ case A_FF_LINE:
+ /*
+ * Force forward N (default 1) line.
+ */
+ if (number <= 0)
+ number = 1;
+ cmd_exec();
+ if (show_attn == OPT_ONPLUS && number > 1)
+ set_attnpos(bottompos);
+ forward((int) number, 1, 0);
+ break;
+
+ case A_BF_LINE:
+ /*
+ * Force backward N (default 1) line.
+ */
+ if (number <= 0)
+ number = 1;
+ cmd_exec();
+ backward((int) number, 1, 0);
+ break;
+
+ case A_FF_SCREEN:
+ /*
+ * Force forward one screen.
+ */
+ if (number <= 0)
+ number = get_swindow();
+ cmd_exec();
+ if (show_attn == OPT_ONPLUS)
+ set_attnpos(bottompos);
+ forward((int) number, 1, 0);
+ break;
+
+ case A_F_FOREVER:
+ /*
+ * Forward forever, ignoring EOF.
+ */
+ if (show_attn)
+ set_attnpos(bottompos);
+ newaction = forw_loop(0);
+ break;
+
+ case A_F_UNTIL_HILITE:
+ newaction = forw_loop(1);
+ break;
+
+ case A_F_SCROLL:
+ /*
+ * Forward N lines
+ * (default same as last 'd' or 'u' command).
+ */
+ if (number > 0)
+ wscroll = (int) number;
+ cmd_exec();
+ if (show_attn == OPT_ONPLUS)
+ set_attnpos(bottompos);
+ forward(wscroll, 0, 0);
+ break;
+
+ case A_B_SCROLL:
+ /*
+ * Forward N lines
+ * (default same as last 'd' or 'u' command).
+ */
+ if (number > 0)
+ wscroll = (int) number;
+ cmd_exec();
+ backward(wscroll, 0, 0);
+ break;
+
+ case A_FREPAINT:
+ /*
+ * Flush buffers, then repaint screen.
+ * Don't flush the buffers on a pipe!
+ */
+ clear_buffers();
+ /* FALLTHRU */
+ case A_REPAINT:
+ /*
+ * Repaint screen.
+ */
+ cmd_exec();
+ repaint();
+ break;
+
+ case A_GOLINE:
+ /*
+ * Go to line N, default beginning of file.
+ */
+ if (number <= 0)
+ number = 1;
+ cmd_exec();
+ jump_back(number);
+ break;
+
+ case A_PERCENT:
+ /*
+ * Go to a specified percentage into the file.
+ */
+ if (number < 0)
+ {
+ number = 0;
+ fraction = 0;
+ }
+ if (number > 100)
+ {
+ number = 100;
+ fraction = 0;
+ }
+ cmd_exec();
+ jump_percent((int) number, fraction);
+ break;
+
+ case A_GOEND:
+ /*
+ * Go to line N, default end of file.
+ */
+ cmd_exec();
+ if (number <= 0)
+ jump_forw();
+ else
+ jump_back(number);
+ break;
+
+ case A_GOEND_BUF:
+ /*
+ * Go to line N, default last buffered byte.
+ */
+ cmd_exec();
+ if (number <= 0)
+ jump_forw_buffered();
+ else
+ jump_back(number);
+ break;
+
+ case A_GOPOS:
+ /*
+ * Go to a specified byte position in the file.
+ */
+ cmd_exec();
+ if (number < 0)
+ number = 0;
+ jump_line_loc((POSITION) number, jump_sline);
+ break;
+
+ case A_STAT:
+ /*
+ * Print file name, etc.
+ */
+ if (ch_getflags() & CH_HELPFILE)
+ break;
+ cmd_exec();
+ parg.p_string = eq_message();
+ error("%s", &parg);
+ break;
+
+ case A_VERSION:
+ /*
+ * Print version number, without the "@(#)".
+ */
+ cmd_exec();
+ dispversion();
+ break;
+
+ case A_QUIT:
+ /*
+ * Exit.
+ */
+ if (curr_ifile != NULL_IFILE &&
+ ch_getflags() & CH_HELPFILE)
+ {
+ /*
+ * Quit while viewing the help file
+ * just means return to viewing the
+ * previous file.
+ */
+ hshift = save_hshift;
+ bs_mode = save_bs_mode;
+ if (edit_prev(1) == 0)
+ break;
+ }
+ if (extra != NULL)
+ quit(*extra);
+ quit(QUIT_OK);
+ break;
+
+/*
+ * Define abbreviation for a commonly used sequence below.
+ */
+#define DO_SEARCH() \
+ if (number <= 0) number = 1; \
+ mca_search(); \
+ cmd_exec(); \
+ multi_search((char *)NULL, (int) number, 0);
+
+
+ case A_F_SEARCH:
+ /*
+ * Search forward for a pattern.
+ * Get the first char of the pattern.
+ */
+ search_type = SRCH_FORW;
+ if (number <= 0)
+ number = 1;
+ mca_search();
+ c = getcc();
+ goto again;
+
+ case A_B_SEARCH:
+ /*
+ * Search backward for a pattern.
+ * Get the first char of the pattern.
+ */
+ search_type = SRCH_BACK;
+ if (number <= 0)
+ number = 1;
+ mca_search();
+ c = getcc();
+ goto again;
+
+ case A_FILTER:
+#if HILITE_SEARCH
+ search_type = SRCH_FORW | SRCH_FILTER;
+ mca_search();
+ c = getcc();
+ goto again;
+#else
+ error("Command not available", NULL_PARG);
+ break;
+#endif
+
+ case A_AGAIN_SEARCH:
+ /*
+ * Repeat previous search.
+ */
+ DO_SEARCH();
+ break;
+
+ case A_T_AGAIN_SEARCH:
+ /*
+ * Repeat previous search, multiple files.
+ */
+ search_type |= SRCH_PAST_EOF;
+ DO_SEARCH();
+ break;
+
+ case A_REVERSE_SEARCH:
+ /*
+ * Repeat previous search, in reverse direction.
+ */
+ save_search_type = search_type;
+ search_type = SRCH_REVERSE(search_type);
+ DO_SEARCH();
+ search_type = save_search_type;
+ break;
+
+ case A_T_REVERSE_SEARCH:
+ /*
+ * Repeat previous search,
+ * multiple files in reverse direction.
+ */
+ save_search_type = search_type;
+ search_type = SRCH_REVERSE(search_type);
+ search_type |= SRCH_PAST_EOF;
+ DO_SEARCH();
+ search_type = save_search_type;
+ break;
+
+ case A_UNDO_SEARCH:
+ undo_search();
+ break;
+
+ case A_HELP:
+ /*
+ * Help.
+ */
+ if (ch_getflags() & CH_HELPFILE)
+ break;
+ cmd_exec();
+ save_hshift = hshift;
+ hshift = 0;
+ save_bs_mode = bs_mode;
+ bs_mode = BS_SPECIAL;
+ (void) edit(FAKE_HELPFILE);
+ break;
+
+ case A_EXAMINE:
+#if EXAMINE
+ /*
+ * Edit a new file. Get the filename.
+ */
+ if (secure)
+ {
+ error("Command not available", NULL_PARG);
+ break;
+ }
+ start_mca(A_EXAMINE, "Examine: ", ml_examine, 0);
+ c = getcc();
+ goto again;
+#else
+ error("Command not available", NULL_PARG);
+ break;
+#endif
+
+ case A_VISUAL:
+ /*
+ * Invoke an editor on the input file.
+ */
+#if EDITOR
+ if (secure)
+ {
+ error("Command not available", NULL_PARG);
+ break;
+ }
+ if (ch_getflags() & CH_HELPFILE)
+ break;
+ if (strcmp(get_filename(curr_ifile), "-") == 0)
+ {
+ error("Cannot edit standard input", NULL_PARG);
+ break;
+ }
+ if (curr_altfilename != NULL)
+ {
+ error("WARNING: This file was viewed via LESSOPEN",
+ NULL_PARG);
+ }
+ start_mca(A_SHELL, "!", ml_shell, 0);
+ /*
+ * Expand the editor prototype string
+ * and pass it to the system to execute.
+ * (Make sure the screen is displayed so the
+ * expansion of "+%lm" works.)
+ */
+ make_display();
+ cmd_exec();
+ lsystem(pr_expand(editproto, 0), (char*)NULL);
+ break;
+#else
+ error("Command not available", NULL_PARG);
+ break;
+#endif
+
+ case A_NEXT_FILE:
+ /*
+ * Examine next file.
+ */
+#if TAGS
+ if (ntags())
+ {
+ error("No next file", NULL_PARG);
+ break;
+ }
+#endif
+ if (number <= 0)
+ number = 1;
+ if (edit_next((int) number))
+ {
+ if (get_quit_at_eof() && eof_displayed() &&
+ !(ch_getflags() & CH_HELPFILE))
+ quit(QUIT_OK);
+ parg.p_string = (number > 1) ? "(N-th) " : "";
+ error("No %snext file", &parg);
+ }
+ break;
+
+ case A_PREV_FILE:
+ /*
+ * Examine previous file.
+ */
+#if TAGS
+ if (ntags())
+ {
+ error("No previous file", NULL_PARG);
+ break;
+ }
+#endif
+ if (number <= 0)
+ number = 1;
+ if (edit_prev((int) number))
+ {
+ parg.p_string = (number > 1) ? "(N-th) " : "";
+ error("No %sprevious file", &parg);
+ }
+ break;
+
+ case A_NEXT_TAG:
+#if TAGS
+ if (number <= 0)
+ number = 1;
+ tagfile = nexttag((int) number);
+ if (tagfile == NULL)
+ {
+ error("No next tag", NULL_PARG);
+ break;
+ }
+ if (edit(tagfile) == 0)
+ {
+ POSITION pos = tagsearch();
+ if (pos != NULL_POSITION)
+ jump_loc(pos, jump_sline);
+ }
+#else
+ error("Command not available", NULL_PARG);
+#endif
+ break;
+
+ case A_PREV_TAG:
+#if TAGS
+ if (number <= 0)
+ number = 1;
+ tagfile = prevtag((int) number);
+ if (tagfile == NULL)
+ {
+ error("No previous tag", NULL_PARG);
+ break;
+ }
+ if (edit(tagfile) == 0)
+ {
+ POSITION pos = tagsearch();
+ if (pos != NULL_POSITION)
+ jump_loc(pos, jump_sline);
+ }
+#else
+ error("Command not available", NULL_PARG);
+#endif
+ break;
+
+ case A_INDEX_FILE:
+ /*
+ * Examine a particular file.
+ */
+ if (number <= 0)
+ number = 1;
+ if (edit_index((int) number))
+ error("No such file", NULL_PARG);
+ break;
+
+ case A_REMOVE_FILE:
+ if (ch_getflags() & CH_HELPFILE)
+ break;
+ old_ifile = curr_ifile;
+ new_ifile = getoff_ifile(curr_ifile);
+ if (new_ifile == NULL_IFILE)
+ {
+ bell();
+ break;
+ }
+ if (edit_ifile(new_ifile) != 0)
+ {
+ reedit_ifile(old_ifile);
+ break;
+ }
+ del_ifile(old_ifile);
+ break;
+
+ case A_OPT_TOGGLE:
+ optflag = OPT_TOGGLE;
+ optgetname = FALSE;
+ mca_opt_toggle();
+ c = getcc();
+ goto again;
+
+ case A_DISP_OPTION:
+ /*
+ * Report a flag setting.
+ */
+ optflag = OPT_NO_TOGGLE;
+ optgetname = FALSE;
+ mca_opt_toggle();
+ c = getcc();
+ goto again;
+
+ case A_FIRSTCMD:
+ /*
+ * Set an initial command for new files.
+ */
+ start_mca(A_FIRSTCMD, "+", (void*)NULL, 0);
+ c = getcc();
+ goto again;
+
+ case A_SHELL:
+ /*
+ * Shell escape.
+ */
+#if SHELL_ESCAPE
+ if (secure)
+ {
+ error("Command not available", NULL_PARG);
+ break;
+ }
+ start_mca(A_SHELL, "!", ml_shell, 0);
+ c = getcc();
+ goto again;
+#else
+ error("Command not available", NULL_PARG);
+ break;
+#endif
+
+ case A_SETMARK:
+ /*
+ * Set a mark.
+ */
+ if (ch_getflags() & CH_HELPFILE)
+ break;
+ start_mca(A_SETMARK, "mark: ", (void*)NULL, 0);
+ c = getcc();
+ if (c == erase_char || c == erase2_char ||
+ c == kill_char || c == '\n' || c == '\r')
+ break;
+ setmark(c);
+ break;
+
+ case A_GOMARK:
+ /*
+ * Go to a mark.
+ */
+ start_mca(A_GOMARK, "goto mark: ", (void*)NULL, 0);
+ c = getcc();
+ if (c == erase_char || c == erase2_char ||
+ c == kill_char || c == '\n' || c == '\r')
+ break;
+ cmd_exec();
+ gomark(c);
+ break;
+
+ case A_PIPE:
+#if PIPEC
+ if (secure)
+ {
+ error("Command not available", NULL_PARG);
+ break;
+ }
+ start_mca(A_PIPE, "|mark: ", (void*)NULL, 0);
+ c = getcc();
+ if (c == erase_char || c == erase2_char || c == kill_char)
+ break;
+ if (c == '\n' || c == '\r')
+ c = '.';
+ if (badmark(c))
+ break;
+ pipec = c;
+ start_mca(A_PIPE, "!", ml_shell, 0);
+ c = getcc();
+ goto again;
+#else
+ error("Command not available", NULL_PARG);
+ break;
+#endif
+
+ case A_B_BRACKET:
+ case A_F_BRACKET:
+ start_mca(action, "Brackets: ", (void*)NULL, 0);
+ c = getcc();
+ goto again;
+
+ case A_LSHIFT:
+ if (number > 0)
+ shift_count = number;
+ else
+ number = (shift_count > 0) ?
+ shift_count : sc_width / 2;
+ if (number > hshift)
+ number = hshift;
+ hshift -= number;
+ screen_trashed = 1;
+ break;
+
+ case A_RSHIFT:
+ if (number > 0)
+ shift_count = number;
+ else
+ number = (shift_count > 0) ?
+ shift_count : sc_width / 2;
+ hshift += number;
+ screen_trashed = 1;
+ break;
+
+ case A_PREFIX:
+ /*
+ * The command is incomplete (more chars are needed).
+ * Display the current char, so the user knows
+ * what's going on, and get another character.
+ */
+ if (mca != A_PREFIX)
+ {
+ cmd_reset();
+ start_mca(A_PREFIX, " ", (void*)NULL,
+ CF_QUIT_ON_ERASE);
+ (void) cmd_char(c);
+ }
+ c = getcc();
+ goto again;
+
+ case A_NOACTION:
+ break;
+
+ default:
+ bell();
+ break;
+ }
+ }
+}
--- /dev/null
+/* Generated by "./mkutable -f2 Mn Me -- unicode/UnicodeData.txt" on Mon Jul 14 16:21:21 PDT 2014 */
+ { 0x0300, 0x036f }, /* Mn */
+ { 0x0483, 0x0487 }, /* Mn */
+ { 0x0488, 0x0489 }, /* Me */
+ { 0x0591, 0x05bd }, /* Mn */
+ { 0x05bf, 0x05bf }, /* Mn */
+ { 0x05c1, 0x05c2 }, /* Mn */
+ { 0x05c4, 0x05c5 }, /* Mn */
+ { 0x05c7, 0x05c7 }, /* Mn */
+ { 0x0610, 0x061a }, /* Mn */
+ { 0x064b, 0x065f }, /* Mn */
+ { 0x0670, 0x0670 }, /* Mn */
+ { 0x06d6, 0x06dc }, /* Mn */
+ { 0x06df, 0x06e4 }, /* Mn */
+ { 0x06e7, 0x06e8 }, /* Mn */
+ { 0x06ea, 0x06ed }, /* Mn */
+ { 0x0711, 0x0711 }, /* Mn */
+ { 0x0730, 0x074a }, /* Mn */
+ { 0x07a6, 0x07b0 }, /* Mn */
+ { 0x07eb, 0x07f3 }, /* Mn */
+ { 0x0816, 0x0819 }, /* Mn */
+ { 0x081b, 0x0823 }, /* Mn */
+ { 0x0825, 0x0827 }, /* Mn */
+ { 0x0829, 0x082d }, /* Mn */
+ { 0x0859, 0x085b }, /* Mn */
+ { 0x08e4, 0x0902 }, /* Mn */
+ { 0x093a, 0x093a }, /* Mn */
+ { 0x093c, 0x093c }, /* Mn */
+ { 0x0941, 0x0948 }, /* Mn */
+ { 0x094d, 0x094d }, /* Mn */
+ { 0x0951, 0x0957 }, /* Mn */
+ { 0x0962, 0x0963 }, /* Mn */
+ { 0x0981, 0x0981 }, /* Mn */
+ { 0x09bc, 0x09bc }, /* Mn */
+ { 0x09c1, 0x09c4 }, /* Mn */
+ { 0x09cd, 0x09cd }, /* Mn */
+ { 0x09e2, 0x09e3 }, /* Mn */
+ { 0x0a01, 0x0a02 }, /* Mn */
+ { 0x0a3c, 0x0a3c }, /* Mn */
+ { 0x0a41, 0x0a42 }, /* Mn */
+ { 0x0a47, 0x0a48 }, /* Mn */
+ { 0x0a4b, 0x0a4d }, /* Mn */
+ { 0x0a51, 0x0a51 }, /* Mn */
+ { 0x0a70, 0x0a71 }, /* Mn */
+ { 0x0a75, 0x0a75 }, /* Mn */
+ { 0x0a81, 0x0a82 }, /* Mn */
+ { 0x0abc, 0x0abc }, /* Mn */
+ { 0x0ac1, 0x0ac5 }, /* Mn */
+ { 0x0ac7, 0x0ac8 }, /* Mn */
+ { 0x0acd, 0x0acd }, /* Mn */
+ { 0x0ae2, 0x0ae3 }, /* Mn */
+ { 0x0b01, 0x0b01 }, /* Mn */
+ { 0x0b3c, 0x0b3c }, /* Mn */
+ { 0x0b3f, 0x0b3f }, /* Mn */
+ { 0x0b41, 0x0b44 }, /* Mn */
+ { 0x0b4d, 0x0b4d }, /* Mn */
+ { 0x0b56, 0x0b56 }, /* Mn */
+ { 0x0b62, 0x0b63 }, /* Mn */
+ { 0x0b82, 0x0b82 }, /* Mn */
+ { 0x0bc0, 0x0bc0 }, /* Mn */
+ { 0x0bcd, 0x0bcd }, /* Mn */
+ { 0x0c00, 0x0c00 }, /* Mn */
+ { 0x0c3e, 0x0c40 }, /* Mn */
+ { 0x0c46, 0x0c48 }, /* Mn */
+ { 0x0c4a, 0x0c4d }, /* Mn */
+ { 0x0c55, 0x0c56 }, /* Mn */
+ { 0x0c62, 0x0c63 }, /* Mn */
+ { 0x0c81, 0x0c81 }, /* Mn */
+ { 0x0cbc, 0x0cbc }, /* Mn */
+ { 0x0cbf, 0x0cbf }, /* Mn */
+ { 0x0cc6, 0x0cc6 }, /* Mn */
+ { 0x0ccc, 0x0ccd }, /* Mn */
+ { 0x0ce2, 0x0ce3 }, /* Mn */
+ { 0x0d01, 0x0d01 }, /* Mn */
+ { 0x0d41, 0x0d44 }, /* Mn */
+ { 0x0d4d, 0x0d4d }, /* Mn */
+ { 0x0d62, 0x0d63 }, /* Mn */
+ { 0x0dca, 0x0dca }, /* Mn */
+ { 0x0dd2, 0x0dd4 }, /* Mn */
+ { 0x0dd6, 0x0dd6 }, /* Mn */
+ { 0x0e31, 0x0e31 }, /* Mn */
+ { 0x0e34, 0x0e3a }, /* Mn */
+ { 0x0e47, 0x0e4e }, /* Mn */
+ { 0x0eb1, 0x0eb1 }, /* Mn */
+ { 0x0eb4, 0x0eb9 }, /* Mn */
+ { 0x0ebb, 0x0ebc }, /* Mn */
+ { 0x0ec8, 0x0ecd }, /* Mn */
+ { 0x0f18, 0x0f19 }, /* Mn */
+ { 0x0f35, 0x0f35 }, /* Mn */
+ { 0x0f37, 0x0f37 }, /* Mn */
+ { 0x0f39, 0x0f39 }, /* Mn */
+ { 0x0f71, 0x0f7e }, /* Mn */
+ { 0x0f80, 0x0f84 }, /* Mn */
+ { 0x0f86, 0x0f87 }, /* Mn */
+ { 0x0f8d, 0x0f97 }, /* Mn */
+ { 0x0f99, 0x0fbc }, /* Mn */
+ { 0x0fc6, 0x0fc6 }, /* Mn */
+ { 0x102d, 0x1030 }, /* Mn */
+ { 0x1032, 0x1037 }, /* Mn */
+ { 0x1039, 0x103a }, /* Mn */
+ { 0x103d, 0x103e }, /* Mn */
+ { 0x1058, 0x1059 }, /* Mn */
+ { 0x105e, 0x1060 }, /* Mn */
+ { 0x1071, 0x1074 }, /* Mn */
+ { 0x1082, 0x1082 }, /* Mn */
+ { 0x1085, 0x1086 }, /* Mn */
+ { 0x108d, 0x108d }, /* Mn */
+ { 0x109d, 0x109d }, /* Mn */
+ { 0x135d, 0x135f }, /* Mn */
+ { 0x1712, 0x1714 }, /* Mn */
+ { 0x1732, 0x1734 }, /* Mn */
+ { 0x1752, 0x1753 }, /* Mn */
+ { 0x1772, 0x1773 }, /* Mn */
+ { 0x17b4, 0x17b5 }, /* Mn */
+ { 0x17b7, 0x17bd }, /* Mn */
+ { 0x17c6, 0x17c6 }, /* Mn */
+ { 0x17c9, 0x17d3 }, /* Mn */
+ { 0x17dd, 0x17dd }, /* Mn */
+ { 0x180b, 0x180d }, /* Mn */
+ { 0x18a9, 0x18a9 }, /* Mn */
+ { 0x1920, 0x1922 }, /* Mn */
+ { 0x1927, 0x1928 }, /* Mn */
+ { 0x1932, 0x1932 }, /* Mn */
+ { 0x1939, 0x193b }, /* Mn */
+ { 0x1a17, 0x1a18 }, /* Mn */
+ { 0x1a1b, 0x1a1b }, /* Mn */
+ { 0x1a56, 0x1a56 }, /* Mn */
+ { 0x1a58, 0x1a5e }, /* Mn */
+ { 0x1a60, 0x1a60 }, /* Mn */
+ { 0x1a62, 0x1a62 }, /* Mn */
+ { 0x1a65, 0x1a6c }, /* Mn */
+ { 0x1a73, 0x1a7c }, /* Mn */
+ { 0x1a7f, 0x1a7f }, /* Mn */
+ { 0x1ab0, 0x1abd }, /* Mn */
+ { 0x1abe, 0x1abe }, /* Me */
+ { 0x1b00, 0x1b03 }, /* Mn */
+ { 0x1b34, 0x1b34 }, /* Mn */
+ { 0x1b36, 0x1b3a }, /* Mn */
+ { 0x1b3c, 0x1b3c }, /* Mn */
+ { 0x1b42, 0x1b42 }, /* Mn */
+ { 0x1b6b, 0x1b73 }, /* Mn */
+ { 0x1b80, 0x1b81 }, /* Mn */
+ { 0x1ba2, 0x1ba5 }, /* Mn */
+ { 0x1ba8, 0x1ba9 }, /* Mn */
+ { 0x1bab, 0x1bad }, /* Mn */
+ { 0x1be6, 0x1be6 }, /* Mn */
+ { 0x1be8, 0x1be9 }, /* Mn */
+ { 0x1bed, 0x1bed }, /* Mn */
+ { 0x1bef, 0x1bf1 }, /* Mn */
+ { 0x1c2c, 0x1c33 }, /* Mn */
+ { 0x1c36, 0x1c37 }, /* Mn */
+ { 0x1cd0, 0x1cd2 }, /* Mn */
+ { 0x1cd4, 0x1ce0 }, /* Mn */
+ { 0x1ce2, 0x1ce8 }, /* Mn */
+ { 0x1ced, 0x1ced }, /* Mn */
+ { 0x1cf4, 0x1cf4 }, /* Mn */
+ { 0x1cf8, 0x1cf9 }, /* Mn */
+ { 0x1dc0, 0x1df5 }, /* Mn */
+ { 0x1dfc, 0x1dff }, /* Mn */
+ { 0x20d0, 0x20dc }, /* Mn */
+ { 0x20dd, 0x20e0 }, /* Me */
+ { 0x20e1, 0x20e1 }, /* Mn */
+ { 0x20e2, 0x20e4 }, /* Me */
+ { 0x20e5, 0x20f0 }, /* Mn */
+ { 0x2cef, 0x2cf1 }, /* Mn */
+ { 0x2d7f, 0x2d7f }, /* Mn */
+ { 0x2de0, 0x2dff }, /* Mn */
+ { 0x302a, 0x302d }, /* Mn */
+ { 0x3099, 0x309a }, /* Mn */
+ { 0xa66f, 0xa66f }, /* Mn */
+ { 0xa670, 0xa672 }, /* Me */
+ { 0xa674, 0xa67d }, /* Mn */
+ { 0xa69f, 0xa69f }, /* Mn */
+ { 0xa6f0, 0xa6f1 }, /* Mn */
+ { 0xa802, 0xa802 }, /* Mn */
+ { 0xa806, 0xa806 }, /* Mn */
+ { 0xa80b, 0xa80b }, /* Mn */
+ { 0xa825, 0xa826 }, /* Mn */
+ { 0xa8c4, 0xa8c4 }, /* Mn */
+ { 0xa8e0, 0xa8f1 }, /* Mn */
+ { 0xa926, 0xa92d }, /* Mn */
+ { 0xa947, 0xa951 }, /* Mn */
+ { 0xa980, 0xa982 }, /* Mn */
+ { 0xa9b3, 0xa9b3 }, /* Mn */
+ { 0xa9b6, 0xa9b9 }, /* Mn */
+ { 0xa9bc, 0xa9bc }, /* Mn */
+ { 0xa9e5, 0xa9e5 }, /* Mn */
+ { 0xaa29, 0xaa2e }, /* Mn */
+ { 0xaa31, 0xaa32 }, /* Mn */
+ { 0xaa35, 0xaa36 }, /* Mn */
+ { 0xaa43, 0xaa43 }, /* Mn */
+ { 0xaa4c, 0xaa4c }, /* Mn */
+ { 0xaa7c, 0xaa7c }, /* Mn */
+ { 0xaab0, 0xaab0 }, /* Mn */
+ { 0xaab2, 0xaab4 }, /* Mn */
+ { 0xaab7, 0xaab8 }, /* Mn */
+ { 0xaabe, 0xaabf }, /* Mn */
+ { 0xaac1, 0xaac1 }, /* Mn */
+ { 0xaaec, 0xaaed }, /* Mn */
+ { 0xaaf6, 0xaaf6 }, /* Mn */
+ { 0xabe5, 0xabe5 }, /* Mn */
+ { 0xabe8, 0xabe8 }, /* Mn */
+ { 0xabed, 0xabed }, /* Mn */
+ { 0xfb1e, 0xfb1e }, /* Mn */
+ { 0xfe00, 0xfe0f }, /* Mn */
+ { 0xfe20, 0xfe2d }, /* Mn */
+ { 0x101fd, 0x101fd }, /* Mn */
+ { 0x102e0, 0x102e0 }, /* Mn */
+ { 0x10376, 0x1037a }, /* Mn */
+ { 0x10a01, 0x10a03 }, /* Mn */
+ { 0x10a05, 0x10a06 }, /* Mn */
+ { 0x10a0c, 0x10a0f }, /* Mn */
+ { 0x10a38, 0x10a3a }, /* Mn */
+ { 0x10a3f, 0x10a3f }, /* Mn */
+ { 0x10ae5, 0x10ae6 }, /* Mn */
+ { 0x11001, 0x11001 }, /* Mn */
+ { 0x11038, 0x11046 }, /* Mn */
+ { 0x1107f, 0x11081 }, /* Mn */
+ { 0x110b3, 0x110b6 }, /* Mn */
+ { 0x110b9, 0x110ba }, /* Mn */
+ { 0x11100, 0x11102 }, /* Mn */
+ { 0x11127, 0x1112b }, /* Mn */
+ { 0x1112d, 0x11134 }, /* Mn */
+ { 0x11173, 0x11173 }, /* Mn */
+ { 0x11180, 0x11181 }, /* Mn */
+ { 0x111b6, 0x111be }, /* Mn */
+ { 0x1122f, 0x11231 }, /* Mn */
+ { 0x11234, 0x11234 }, /* Mn */
+ { 0x11236, 0x11237 }, /* Mn */
+ { 0x112df, 0x112df }, /* Mn */
+ { 0x112e3, 0x112ea }, /* Mn */
+ { 0x11301, 0x11301 }, /* Mn */
+ { 0x1133c, 0x1133c }, /* Mn */
+ { 0x11340, 0x11340 }, /* Mn */
+ { 0x11366, 0x1136c }, /* Mn */
+ { 0x11370, 0x11374 }, /* Mn */
+ { 0x114b3, 0x114b8 }, /* Mn */
+ { 0x114ba, 0x114ba }, /* Mn */
+ { 0x114bf, 0x114c0 }, /* Mn */
+ { 0x114c2, 0x114c3 }, /* Mn */
+ { 0x115b2, 0x115b5 }, /* Mn */
+ { 0x115bc, 0x115bd }, /* Mn */
+ { 0x115bf, 0x115c0 }, /* Mn */
+ { 0x11633, 0x1163a }, /* Mn */
+ { 0x1163d, 0x1163d }, /* Mn */
+ { 0x1163f, 0x11640 }, /* Mn */
+ { 0x116ab, 0x116ab }, /* Mn */
+ { 0x116ad, 0x116ad }, /* Mn */
+ { 0x116b0, 0x116b5 }, /* Mn */
+ { 0x116b7, 0x116b7 }, /* Mn */
+ { 0x16af0, 0x16af4 }, /* Mn */
+ { 0x16b30, 0x16b36 }, /* Mn */
+ { 0x16f8f, 0x16f92 }, /* Mn */
+ { 0x1bc9d, 0x1bc9e }, /* Mn */
+ { 0x1d167, 0x1d169 }, /* Mn */
+ { 0x1d17b, 0x1d182 }, /* Mn */
+ { 0x1d185, 0x1d18b }, /* Mn */
+ { 0x1d1aa, 0x1d1ad }, /* Mn */
+ { 0x1d242, 0x1d244 }, /* Mn */
+ { 0x1e8d0, 0x1e8d6 }, /* Mn */
+ { 0xe0100, 0xe01ef }, /* Mn */
--- /dev/null
+#! /bin/sh
+# Guess values for system-dependent variables and create Makefiles.
+# Generated by GNU Autoconf 2.69 for less 1.
+#
+#
+# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
+#
+#
+# This configure script is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
+
+# Be more Bourne compatible
+DUALCASE=1; export DUALCASE # for MKS sh
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
+ emulate sh
+ NULLCMD=:
+ # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+ # is contrary to our usage. Disable this feature.
+ alias -g '${1+"$@"}'='"$@"'
+ setopt NO_GLOB_SUBST
+else
+ case `(set -o) 2>/dev/null` in #(
+ *posix*) :
+ set -o posix ;; #(
+ *) :
+ ;;
+esac
+fi
+
+
+as_nl='
+'
+export as_nl
+# Printing a long string crashes Solaris 7 /usr/bin/printf.
+as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
+# Prefer a ksh shell builtin over an external printf program on Solaris,
+# but without wasting forks for bash or zsh.
+if test -z "$BASH_VERSION$ZSH_VERSION" \
+ && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
+ as_echo='print -r --'
+ as_echo_n='print -rn --'
+elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
+ as_echo='printf %s\n'
+ as_echo_n='printf %s'
+else
+ if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then
+ as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"'
+ as_echo_n='/usr/ucb/echo -n'
+ else
+ as_echo_body='eval expr "X$1" : "X\\(.*\\)"'
+ as_echo_n_body='eval
+ arg=$1;
+ case $arg in #(
+ *"$as_nl"*)
+ expr "X$arg" : "X\\(.*\\)$as_nl";
+ arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
+ esac;
+ expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl"
+ '
+ export as_echo_n_body
+ as_echo_n='sh -c $as_echo_n_body as_echo'
+ fi
+ export as_echo_body
+ as_echo='sh -c $as_echo_body as_echo'
+fi
+
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+ PATH_SEPARATOR=:
+ (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+ (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+ PATH_SEPARATOR=';'
+ }
+fi
+
+
+# IFS
+# We need space, tab and new line, in precisely that order. Quoting is
+# there to prevent editors from complaining about space-tab.
+# (If _AS_PATH_WALK were called with IFS unset, it would disable word
+# splitting by setting IFS to empty value.)
+IFS=" "" $as_nl"
+
+# Find who we are. Look in the path if we contain no directory separator.
+as_myself=
+case $0 in #((
+ *[\\/]* ) as_myself=$0 ;;
+ *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+ done
+IFS=$as_save_IFS
+
+ ;;
+esac
+# We did not find ourselves, most probably we were run as `sh COMMAND'
+# in which case we are not to be found in the path.
+if test "x$as_myself" = x; then
+ as_myself=$0
+fi
+if test ! -f "$as_myself"; then
+ $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+ exit 1
+fi
+
+# Unset variables that we do not need and which cause bugs (e.g. in
+# pre-3.0 UWIN ksh). But do not cause bugs in bash 2.01; the "|| exit 1"
+# suppresses any "Segmentation fault" message there. '((' could
+# trigger a bug in pdksh 5.2.14.
+for as_var in BASH_ENV ENV MAIL MAILPATH
+do eval test x\${$as_var+set} = xset \
+ && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# NLS nuisances.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# CDPATH.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+# Use a proper internal environment variable to ensure we don't fall
+ # into an infinite loop, continuously re-executing ourselves.
+ if test x"${_as_can_reexec}" != xno && test "x$CONFIG_SHELL" != x; then
+ _as_can_reexec=no; export _as_can_reexec;
+ # We cannot yet assume a decent shell, so we have to provide a
+# neutralization value for shells without unset; and this also
+# works around shells that cannot unset nonexistent variables.
+# Preserve -v and -x to the replacement shell.
+BASH_ENV=/dev/null
+ENV=/dev/null
+(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+case $- in # ((((
+ *v*x* | *x*v* ) as_opts=-vx ;;
+ *v* ) as_opts=-v ;;
+ *x* ) as_opts=-x ;;
+ * ) as_opts= ;;
+esac
+exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
+# Admittedly, this is quite paranoid, since all the known shells bail
+# out after a failed `exec'.
+$as_echo "$0: could not re-execute with $CONFIG_SHELL" >&2
+as_fn_exit 255
+ fi
+ # We don't want this to propagate to other subprocesses.
+ { _as_can_reexec=; unset _as_can_reexec;}
+if test "x$CONFIG_SHELL" = x; then
+ as_bourne_compatible="if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then :
+ emulate sh
+ NULLCMD=:
+ # Pre-4.2 versions of Zsh do word splitting on \${1+\"\$@\"}, which
+ # is contrary to our usage. Disable this feature.
+ alias -g '\${1+\"\$@\"}'='\"\$@\"'
+ setopt NO_GLOB_SUBST
+else
+ case \`(set -o) 2>/dev/null\` in #(
+ *posix*) :
+ set -o posix ;; #(
+ *) :
+ ;;
+esac
+fi
+"
+ as_required="as_fn_return () { (exit \$1); }
+as_fn_success () { as_fn_return 0; }
+as_fn_failure () { as_fn_return 1; }
+as_fn_ret_success () { return 0; }
+as_fn_ret_failure () { return 1; }
+
+exitcode=0
+as_fn_success || { exitcode=1; echo as_fn_success failed.; }
+as_fn_failure && { exitcode=1; echo as_fn_failure succeeded.; }
+as_fn_ret_success || { exitcode=1; echo as_fn_ret_success failed.; }
+as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
+if ( set x; as_fn_ret_success y && test x = \"\$1\" ); then :
+
+else
+ exitcode=1; echo positional parameters were not saved.
+fi
+test x\$exitcode = x0 || exit 1
+test -x / || exit 1"
+ as_suggested=" as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO
+ as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO
+ eval 'test \"x\$as_lineno_1'\$as_run'\" != \"x\$as_lineno_2'\$as_run'\" &&
+ test \"x\`expr \$as_lineno_1'\$as_run' + 1\`\" = \"x\$as_lineno_2'\$as_run'\"' || exit 1
+test \$(( 1 + 1 )) = 2 || exit 1"
+ if (eval "$as_required") 2>/dev/null; then :
+ as_have_required=yes
+else
+ as_have_required=no
+fi
+ if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null; then :
+
+else
+ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+as_found=false
+for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ as_found=:
+ case $as_dir in #(
+ /*)
+ for as_base in sh bash ksh sh5; do
+ # Try only shells that exist, to save several forks.
+ as_shell=$as_dir/$as_base
+ if { test -f "$as_shell" || test -f "$as_shell.exe"; } &&
+ { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$as_shell"; } 2>/dev/null; then :
+ CONFIG_SHELL=$as_shell as_have_required=yes
+ if { $as_echo "$as_bourne_compatible""$as_suggested" | as_run=a "$as_shell"; } 2>/dev/null; then :
+ break 2
+fi
+fi
+ done;;
+ esac
+ as_found=false
+done
+$as_found || { if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
+ { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$SHELL"; } 2>/dev/null; then :
+ CONFIG_SHELL=$SHELL as_have_required=yes
+fi; }
+IFS=$as_save_IFS
+
+
+ if test "x$CONFIG_SHELL" != x; then :
+ export CONFIG_SHELL
+ # We cannot yet assume a decent shell, so we have to provide a
+# neutralization value for shells without unset; and this also
+# works around shells that cannot unset nonexistent variables.
+# Preserve -v and -x to the replacement shell.
+BASH_ENV=/dev/null
+ENV=/dev/null
+(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+case $- in # ((((
+ *v*x* | *x*v* ) as_opts=-vx ;;
+ *v* ) as_opts=-v ;;
+ *x* ) as_opts=-x ;;
+ * ) as_opts= ;;
+esac
+exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
+# Admittedly, this is quite paranoid, since all the known shells bail
+# out after a failed `exec'.
+$as_echo "$0: could not re-execute with $CONFIG_SHELL" >&2
+exit 255
+fi
+
+ if test x$as_have_required = xno; then :
+ $as_echo "$0: This script requires a shell more modern than all"
+ $as_echo "$0: the shells that I found on your system."
+ if test x${ZSH_VERSION+set} = xset ; then
+ $as_echo "$0: In particular, zsh $ZSH_VERSION has bugs and should"
+ $as_echo "$0: be upgraded to zsh 4.3.4 or later."
+ else
+ $as_echo "$0: Please tell bug-autoconf@gnu.org about your system,
+$0: including any error possibly output before this
+$0: message. Then install a modern shell, or manually run
+$0: the script under such a shell if you do have one."
+ fi
+ exit 1
+fi
+fi
+fi
+SHELL=${CONFIG_SHELL-/bin/sh}
+export SHELL
+# Unset more variables known to interfere with behavior of common tools.
+CLICOLOR_FORCE= GREP_OPTIONS=
+unset CLICOLOR_FORCE GREP_OPTIONS
+
+## --------------------- ##
+## M4sh Shell Functions. ##
+## --------------------- ##
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+ { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+ return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+ set +e
+ as_fn_set_status $1
+ exit $1
+} # as_fn_exit
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+ case $as_dir in #(
+ -*) as_dir=./$as_dir;;
+ esac
+ test -d "$as_dir" || eval $as_mkdir_p || {
+ as_dirs=
+ while :; do
+ case $as_dir in #(
+ *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+ *) as_qdir=$as_dir;;
+ esac
+ as_dirs="'$as_qdir' $as_dirs"
+ as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+ X"$as_dir" : 'X\(//\)[^/]' \| \
+ X"$as_dir" : 'X\(//\)$' \| \
+ X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$as_dir" |
+ sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+ s//\1/
+ q
+ }
+ /^X\(\/\/\)[^/].*/{
+ s//\1/
+ q
+ }
+ /^X\(\/\/\)$/{
+ s//\1/
+ q
+ }
+ /^X\(\/\).*/{
+ s//\1/
+ q
+ }
+ s/.*/./; q'`
+ test -d "$as_dir" && break
+ done
+ test -z "$as_dirs" || eval "mkdir $as_dirs"
+ } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+
+# as_fn_executable_p FILE
+# -----------------------
+# Test if FILE is an executable regular file.
+as_fn_executable_p ()
+{
+ test -f "$1" && test -x "$1"
+} # as_fn_executable_p
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then :
+ eval 'as_fn_append ()
+ {
+ eval $1+=\$2
+ }'
+else
+ as_fn_append ()
+ {
+ eval $1=\$$1\$2
+ }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
+ eval 'as_fn_arith ()
+ {
+ as_val=$(( $* ))
+ }'
+else
+ as_fn_arith ()
+ {
+ as_val=`expr "$@" || test $? -eq 1`
+ }
+fi # as_fn_arith
+
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+ as_status=$1; test $as_status -eq 0 && as_status=1
+ if test "$4"; then
+ as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+ fi
+ $as_echo "$as_me: error: $2" >&2
+ as_fn_exit $as_status
+} # as_fn_error
+
+if expr a : '\(a\)' >/dev/null 2>&1 &&
+ test "X`expr 00001 : '.*\(...\)'`" = X001; then
+ as_expr=expr
+else
+ as_expr=false
+fi
+
+if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
+ as_basename=basename
+else
+ as_basename=false
+fi
+
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+ as_dirname=dirname
+else
+ as_dirname=false
+fi
+
+as_me=`$as_basename -- "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+ X"$0" : 'X\(//\)$' \| \
+ X"$0" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X/"$0" |
+ sed '/^.*\/\([^/][^/]*\)\/*$/{
+ s//\1/
+ q
+ }
+ /^X\/\(\/\/\)$/{
+ s//\1/
+ q
+ }
+ /^X\/\(\/\).*/{
+ s//\1/
+ q
+ }
+ s/.*/./; q'`
+
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+
+ as_lineno_1=$LINENO as_lineno_1a=$LINENO
+ as_lineno_2=$LINENO as_lineno_2a=$LINENO
+ eval 'test "x$as_lineno_1'$as_run'" != "x$as_lineno_2'$as_run'" &&
+ test "x`expr $as_lineno_1'$as_run' + 1`" = "x$as_lineno_2'$as_run'"' || {
+ # Blame Lee E. McMahon (1931-1989) for sed's syntax. :-)
+ sed -n '
+ p
+ /[$]LINENO/=
+ ' <$as_myself |
+ sed '
+ s/[$]LINENO.*/&-/
+ t lineno
+ b
+ :lineno
+ N
+ :loop
+ s/[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\)/\2\1\2/
+ t loop
+ s/-\n.*//
+ ' >$as_me.lineno &&
+ chmod +x "$as_me.lineno" ||
+ { $as_echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
+
+ # If we had to re-execute with $CONFIG_SHELL, we're ensured to have
+ # already done that, so ensure we don't try to do so again and fall
+ # in an infinite loop. This has already happened in practice.
+ _as_can_reexec=no; export _as_can_reexec
+ # Don't try to exec as it changes $[0], causing all sort of problems
+ # (the dirname of $[0] is not the place where we might find the
+ # original and so on. Autoconf is especially sensitive to this).
+ . "./$as_me.lineno"
+ # Exit status is that of the last command.
+ exit
+}
+
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+ case `echo 'xy\c'` in
+ *c*) ECHO_T=' ';; # ECHO_T is single tab character.
+ xy) ECHO_C='\c';;
+ *) echo `echo ksh88 bug on AIX 6.1` > /dev/null
+ ECHO_T=' ';;
+ esac;;
+*)
+ ECHO_N='-n';;
+esac
+
+rm -f conf$$ conf$$.exe conf$$.file
+if test -d conf$$.dir; then
+ rm -f conf$$.dir/conf$$.file
+else
+ rm -f conf$$.dir
+ mkdir conf$$.dir 2>/dev/null
+fi
+if (echo >conf$$.file) 2>/dev/null; then
+ if ln -s conf$$.file conf$$ 2>/dev/null; then
+ as_ln_s='ln -s'
+ # ... but there are two gotchas:
+ # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+ # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+ # In both cases, we have to default to `cp -pR'.
+ ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
+ as_ln_s='cp -pR'
+ elif ln conf$$.file conf$$ 2>/dev/null; then
+ as_ln_s=ln
+ else
+ as_ln_s='cp -pR'
+ fi
+else
+ as_ln_s='cp -pR'
+fi
+rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
+rmdir conf$$.dir 2>/dev/null
+
+if mkdir -p . 2>/dev/null; then
+ as_mkdir_p='mkdir -p "$as_dir"'
+else
+ test -d ./-p && rmdir ./-p
+ as_mkdir_p=false
+fi
+
+as_test_x='test -x'
+as_executable_p=as_fn_executable_p
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+test -n "$DJDIR" || exec 7<&0 </dev/null
+exec 6>&1
+
+# Name of the host.
+# hostname on some systems (SVR3.2, old GNU/Linux) returns a bogus exit status,
+# so uname gets run too.
+ac_hostname=`(hostname || uname -n) 2>/dev/null | sed 1q`
+
+#
+# Initializations.
+#
+ac_default_prefix=/usr/local
+ac_clean_files=
+ac_config_libobj_dir=.
+LIBOBJS=
+cross_compiling=no
+subdirs=
+MFLAGS=
+MAKEFLAGS=
+
+# Identity of this package.
+PACKAGE_NAME='less'
+PACKAGE_TARNAME='less'
+PACKAGE_VERSION='1'
+PACKAGE_STRING='less 1'
+PACKAGE_BUGREPORT=''
+PACKAGE_URL=''
+
+ac_unique_file="forwback.c"
+# Factoring default headers for most tests.
+ac_includes_default="\
+#include <stdio.h>
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+# endif
+#endif
+#ifdef HAVE_STRING_H
+# if !defined STDC_HEADERS && defined HAVE_MEMORY_H
+# include <memory.h>
+# endif
+# include <string.h>
+#endif
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif
+#ifdef HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif"
+
+ac_subst_vars='LTLIBOBJS
+LIBOBJS
+REGEX_O
+INSTALL_DATA
+INSTALL_SCRIPT
+INSTALL_PROGRAM
+EGREP
+GREP
+CPP
+OBJEXT
+EXEEXT
+ac_ct_CC
+CPPFLAGS
+LDFLAGS
+CFLAGS
+CC
+target_alias
+host_alias
+build_alias
+LIBS
+ECHO_T
+ECHO_N
+ECHO_C
+DEFS
+mandir
+localedir
+libdir
+psdir
+pdfdir
+dvidir
+htmldir
+infodir
+docdir
+oldincludedir
+includedir
+localstatedir
+sharedstatedir
+sysconfdir
+datadir
+datarootdir
+libexecdir
+sbindir
+bindir
+program_transform_name
+prefix
+exec_prefix
+PACKAGE_URL
+PACKAGE_BUGREPORT
+PACKAGE_STRING
+PACKAGE_VERSION
+PACKAGE_TARNAME
+PACKAGE_NAME
+PATH_SEPARATOR
+SHELL'
+ac_subst_files=''
+ac_user_opts='
+enable_option_checking
+enable_largefile
+with_secure
+with_no_float
+with_regex
+with_editor
+'
+ ac_precious_vars='build_alias
+host_alias
+target_alias
+CC
+CFLAGS
+LDFLAGS
+LIBS
+CPPFLAGS
+CPP'
+
+
+# Initialize some variables set by options.
+ac_init_help=
+ac_init_version=false
+ac_unrecognized_opts=
+ac_unrecognized_sep=
+# The variables have the same names as the options, with
+# dashes changed to underlines.
+cache_file=/dev/null
+exec_prefix=NONE
+no_create=
+no_recursion=
+prefix=NONE
+program_prefix=NONE
+program_suffix=NONE
+program_transform_name=s,x,x,
+silent=
+site=
+srcdir=
+verbose=
+x_includes=NONE
+x_libraries=NONE
+
+# Installation directory options.
+# These are left unexpanded so users can "make install exec_prefix=/foo"
+# and all the variables that are supposed to be based on exec_prefix
+# by default will actually change.
+# Use braces instead of parens because sh, perl, etc. also accept them.
+# (The list follows the same order as the GNU Coding Standards.)
+bindir='${exec_prefix}/bin'
+sbindir='${exec_prefix}/sbin'
+libexecdir='${exec_prefix}/libexec'
+datarootdir='${prefix}/share'
+datadir='${datarootdir}'
+sysconfdir='${prefix}/etc'
+sharedstatedir='${prefix}/com'
+localstatedir='${prefix}/var'
+includedir='${prefix}/include'
+oldincludedir='/usr/include'
+docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
+infodir='${datarootdir}/info'
+htmldir='${docdir}'
+dvidir='${docdir}'
+pdfdir='${docdir}'
+psdir='${docdir}'
+libdir='${exec_prefix}/lib'
+localedir='${datarootdir}/locale'
+mandir='${datarootdir}/man'
+
+ac_prev=
+ac_dashdash=
+for ac_option
+do
+ # If the previous option needs an argument, assign it.
+ if test -n "$ac_prev"; then
+ eval $ac_prev=\$ac_option
+ ac_prev=
+ continue
+ fi
+
+ case $ac_option in
+ *=?*) ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
+ *=) ac_optarg= ;;
+ *) ac_optarg=yes ;;
+ esac
+
+ # Accept the important Cygnus configure options, so we can diagnose typos.
+
+ case $ac_dashdash$ac_option in
+ --)
+ ac_dashdash=yes ;;
+
+ -bindir | --bindir | --bindi | --bind | --bin | --bi)
+ ac_prev=bindir ;;
+ -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
+ bindir=$ac_optarg ;;
+
+ -build | --build | --buil | --bui | --bu)
+ ac_prev=build_alias ;;
+ -build=* | --build=* | --buil=* | --bui=* | --bu=*)
+ build_alias=$ac_optarg ;;
+
+ -cache-file | --cache-file | --cache-fil | --cache-fi \
+ | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+ ac_prev=cache_file ;;
+ -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+ | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
+ cache_file=$ac_optarg ;;
+
+ --config-cache | -C)
+ cache_file=config.cache ;;
+
+ -datadir | --datadir | --datadi | --datad)
+ ac_prev=datadir ;;
+ -datadir=* | --datadir=* | --datadi=* | --datad=*)
+ datadir=$ac_optarg ;;
+
+ -datarootdir | --datarootdir | --datarootdi | --datarootd | --dataroot \
+ | --dataroo | --dataro | --datar)
+ ac_prev=datarootdir ;;
+ -datarootdir=* | --datarootdir=* | --datarootdi=* | --datarootd=* \
+ | --dataroot=* | --dataroo=* | --dataro=* | --datar=*)
+ datarootdir=$ac_optarg ;;
+
+ -disable-* | --disable-*)
+ ac_useropt=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
+ # Reject names that are not valid shell variable names.
+ expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+ as_fn_error $? "invalid feature name: $ac_useropt"
+ ac_useropt_orig=$ac_useropt
+ ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+ case $ac_user_opts in
+ *"
+"enable_$ac_useropt"
+"*) ;;
+ *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--disable-$ac_useropt_orig"
+ ac_unrecognized_sep=', ';;
+ esac
+ eval enable_$ac_useropt=no ;;
+
+ -docdir | --docdir | --docdi | --doc | --do)
+ ac_prev=docdir ;;
+ -docdir=* | --docdir=* | --docdi=* | --doc=* | --do=*)
+ docdir=$ac_optarg ;;
+
+ -dvidir | --dvidir | --dvidi | --dvid | --dvi | --dv)
+ ac_prev=dvidir ;;
+ -dvidir=* | --dvidir=* | --dvidi=* | --dvid=* | --dvi=* | --dv=*)
+ dvidir=$ac_optarg ;;
+
+ -enable-* | --enable-*)
+ ac_useropt=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
+ # Reject names that are not valid shell variable names.
+ expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
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+ ac_useropt_orig=$ac_useropt
+ ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
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+"enable_$ac_useropt"
+"*) ;;
+ *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--enable-$ac_useropt_orig"
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+ esac
+ eval enable_$ac_useropt=\$ac_optarg ;;
+
+ -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+ | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+ | --exec | --exe | --ex)
+ ac_prev=exec_prefix ;;
+ -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
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+ exec_prefix=$ac_optarg ;;
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+ ac_init_help=short ;;
+
+ -host | --host | --hos | --ho)
+ ac_prev=host_alias ;;
+ -host=* | --host=* | --hos=* | --ho=*)
+ host_alias=$ac_optarg ;;
+
+ -htmldir | --htmldir | --htmldi | --htmld | --html | --htm | --ht)
+ ac_prev=htmldir ;;
+ -htmldir=* | --htmldir=* | --htmldi=* | --htmld=* | --html=* | --htm=* \
+ | --ht=*)
+ htmldir=$ac_optarg ;;
+
+ -includedir | --includedir | --includedi | --included | --include \
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+ includedir=$ac_optarg ;;
+
+ -infodir | --infodir | --infodi | --infod | --info | --inf)
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+ infodir=$ac_optarg ;;
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+ ac_prev=libdir ;;
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+
+ -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \
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+ libexecdir=$ac_optarg ;;
+
+ -localedir | --localedir | --localedi | --localed | --locale)
+ ac_prev=localedir ;;
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+ localedir=$ac_optarg ;;
+
+ -localstatedir | --localstatedir | --localstatedi | --localstated \
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+ -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
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+ -nfp | --nfp | --nf)
+ # Obsolete; use --without-fp.
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+ -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
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+ oldincludedir=$ac_optarg ;;
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+ -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
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+ -program-prefix | --program-prefix | --program-prefi | --program-pref \
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+ -program-suffix | --program-suffix | --program-suffi | --program-suff \
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+ program_suffix=$ac_optarg ;;
+
+ -program-transform-name | --program-transform-name \
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+ ac_prev=program_transform_name ;;
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+ program_transform_name=$ac_optarg ;;
+
+ -pdfdir | --pdfdir | --pdfdi | --pdfd | --pdf | --pd)
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+ pdfdir=$ac_optarg ;;
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+ -psdir | --psdir | --psdi | --psd | --ps)
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+ psdir=$ac_optarg ;;
+
+ -q | -quiet | --quiet | --quie | --qui | --qu | --q \
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+
+ -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
+ ac_prev=sbindir ;;
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+ sbindir=$ac_optarg ;;
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+ -sharedstatedir | --sharedstatedir | --sharedstatedi \
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+ | --sha | --sh)
+ ac_prev=sharedstatedir ;;
+ -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
+ | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
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+ sharedstatedir=$ac_optarg ;;
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+ -site | --site | --sit)
+ ac_prev=site ;;
+ -site=* | --site=* | --sit=*)
+ site=$ac_optarg ;;
+
+ -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+ ac_prev=srcdir ;;
+ -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+ srcdir=$ac_optarg ;;
+
+ -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
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+ ac_prev=sysconfdir ;;
+ -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
+ | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
+ sysconfdir=$ac_optarg ;;
+
+ -target | --target | --targe | --targ | --tar | --ta | --t)
+ ac_prev=target_alias ;;
+ -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+ target_alias=$ac_optarg ;;
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+ -v | -verbose | --verbose | --verbos | --verbo | --verb)
+ verbose=yes ;;
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+ -version | --version | --versio | --versi | --vers | -V)
+ ac_init_version=: ;;
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+ -with-* | --with-*)
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+ # Reject names that are not valid shell variable names.
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+ ac_useropt_orig=$ac_useropt
+ ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
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+ -without-* | --without-*)
+ ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
+ # Reject names that are not valid shell variable names.
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+ as_fn_error $? "invalid package name: $ac_useropt"
+ ac_useropt_orig=$ac_useropt
+ ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
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+"*) ;;
+ *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--without-$ac_useropt_orig"
+ ac_unrecognized_sep=', ';;
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+ eval with_$ac_useropt=no ;;
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+ --x)
+ # Obsolete; use --with-x.
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+ -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
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+ x_includes=$ac_optarg ;;
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+ -x-libraries | --x-libraries | --x-librarie | --x-librari \
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+ ac_prev=x_libraries ;;
+ -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
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+ x_libraries=$ac_optarg ;;
+
+ -*) as_fn_error $? "unrecognized option: \`$ac_option'
+Try \`$0 --help' for more information"
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+ *=*)
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+ # Reject names that are not valid shell variable names.
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+ eval $ac_envvar=\$ac_optarg
+ export $ac_envvar ;;
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+ *)
+ # FIXME: should be removed in autoconf 3.0.
+ $as_echo "$as_me: WARNING: you should use --build, --host, --target" >&2
+ expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
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+ esac
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+if test -n "$ac_prev"; then
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+if test -n "$ac_unrecognized_opts"; then
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+ *) $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
+ esac
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+
+# Check all directory arguments for consistency.
+for ac_var in exec_prefix prefix bindir sbindir libexecdir datarootdir \
+ datadir sysconfdir sharedstatedir localstatedir includedir \
+ oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
+ libdir localedir mandir
+do
+ eval ac_val=\$$ac_var
+ # Remove trailing slashes.
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+ as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
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+
+# There might be people who depend on the old broken behavior: `$host'
+# used to hold the argument of --host etc.
+# FIXME: To remove some day.
+build=$build_alias
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+
+# FIXME: To remove some day.
+if test "x$host_alias" != x; then
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+ac_tool_prefix=
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+test "$silent" = yes && exec 6>/dev/null
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+
+ac_pwd=`pwd` && test -n "$ac_pwd" &&
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+ as_fn_error $? "pwd does not report name of working directory"
+
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+ ac_srcdir_defaulted=yes
+ # Try the directory containing this script, then the parent directory.
+ ac_confdir=`$as_dirname -- "$as_myself" ||
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+ srcdir=$ac_confdir
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+if test ! -r "$srcdir/$ac_unique_file"; then
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+ac_msg="sources are in $srcdir, but \`cd $srcdir' does not work"
+ac_abs_confdir=`(
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+# When building in place, set srcdir=.
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+ srcdir=.
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+# Remove unnecessary trailing slashes from srcdir.
+# Double slashes in file names in object file debugging info
+# mess up M-x gdb in Emacs.
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+for ac_var in $ac_precious_vars; do
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+if test "$ac_init_help" = "long"; then
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+ # This message is too long to be a string in the A/UX 3.1 sh.
+ cat <<_ACEOF
+\`configure' configures less 1 to adapt to many kinds of systems.
+
+Usage: $0 [OPTION]... [VAR=VALUE]...
+
+To assign environment variables (e.g., CC, CFLAGS...), specify them as
+VAR=VALUE. See below for descriptions of some of the useful variables.
+
+Defaults for the options are specified in brackets.
+
+Configuration:
+ -h, --help display this help and exit
+ --help=short display options specific to this package
+ --help=recursive display the short help of all the included packages
+ -V, --version display version information and exit
+ -q, --quiet, --silent do not print \`checking ...' messages
+ --cache-file=FILE cache test results in FILE [disabled]
+ -C, --config-cache alias for \`--cache-file=config.cache'
+ -n, --no-create do not create output files
+ --srcdir=DIR find the sources in DIR [configure dir or \`..']
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+ --exec-prefix=EPREFIX install architecture-dependent files in EPREFIX
+ [PREFIX]
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+By default, \`make install' will install all the files in
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+For better control, use the options below.
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+Fine tuning of the installation directories:
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+ --sbindir=DIR system admin executables [EPREFIX/sbin]
+ --libexecdir=DIR program executables [EPREFIX/libexec]
+ --sysconfdir=DIR read-only single-machine data [PREFIX/etc]
+ --sharedstatedir=DIR modifiable architecture-independent data [PREFIX/com]
+ --localstatedir=DIR modifiable single-machine data [PREFIX/var]
+ --libdir=DIR object code libraries [EPREFIX/lib]
+ --includedir=DIR C header files [PREFIX/include]
+ --oldincludedir=DIR C header files for non-gcc [/usr/include]
+ --datarootdir=DIR read-only arch.-independent data root [PREFIX/share]
+ --datadir=DIR read-only architecture-independent data [DATAROOTDIR]
+ --infodir=DIR info documentation [DATAROOTDIR/info]
+ --localedir=DIR locale-dependent data [DATAROOTDIR/locale]
+ --mandir=DIR man documentation [DATAROOTDIR/man]
+ --docdir=DIR documentation root [DATAROOTDIR/doc/less]
+ --htmldir=DIR html documentation [DOCDIR]
+ --dvidir=DIR dvi documentation [DOCDIR]
+ --pdfdir=DIR pdf documentation [DOCDIR]
+ --psdir=DIR ps documentation [DOCDIR]
+_ACEOF
+
+ cat <<\_ACEOF
+_ACEOF
+fi
+
+if test -n "$ac_init_help"; then
+ case $ac_init_help in
+ short | recursive ) echo "Configuration of less 1:";;
+ esac
+ cat <<\_ACEOF
+
+Optional Features:
+ --disable-option-checking ignore unrecognized --enable/--with options
+ --disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
+ --enable-FEATURE[=ARG] include FEATURE [ARG=yes]
+ --disable-largefile omit support for large files
+
+Optional Packages:
+ --with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
+ --without-PACKAGE do not use PACKAGE (same as --with-PACKAGE=no)
+ --with-secure Compile in secure mode
+ --with-no-float Do not use floating point
+ --with-regex={auto,gnu,pcre,posix,regcmp,re_comp,regcomp,regcomp-local,none} Select a regular expression library auto
+ --with-editor=PROGRAM use PROGRAM as the default editor vi
+
+Some influential environment variables:
+ CC C compiler command
+ CFLAGS C compiler flags
+ LDFLAGS linker flags, e.g. -L<lib dir> if you have libraries in a
+ nonstandard directory <lib dir>
+ LIBS libraries to pass to the linker, e.g. -l<library>
+ CPPFLAGS (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
+ you have headers in a nonstandard directory <include dir>
+ CPP C preprocessor
+
+Use these variables to override the choices made by `configure' or to help
+it to find libraries and programs with nonstandard names/locations.
+
+Report bugs to the package provider.
+_ACEOF
+ac_status=$?
+fi
+
+if test "$ac_init_help" = "recursive"; then
+ # If there are subdirs, report their specific --help.
+ for ac_dir in : $ac_subdirs_all; do test "x$ac_dir" = x: && continue
+ test -d "$ac_dir" ||
+ { cd "$srcdir" && ac_pwd=`pwd` && srcdir=. && test -d "$ac_dir"; } ||
+ continue
+ ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+ ac_dir_suffix=/`$as_echo "$ac_dir" | sed 's|^\.[\\/]||'`
+ # A ".." for each directory in $ac_dir_suffix.
+ ac_top_builddir_sub=`$as_echo "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
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+ *) ac_top_build_prefix=$ac_top_builddir_sub/ ;;
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+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
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+ ac_srcdir=.
+ ac_top_srcdir=$ac_top_builddir_sub
+ ac_abs_top_srcdir=$ac_pwd ;;
+ [\\/]* | ?:[\\/]* ) # Absolute name.
+ ac_srcdir=$srcdir$ac_dir_suffix;
+ ac_top_srcdir=$srcdir
+ ac_abs_top_srcdir=$srcdir ;;
+ *) # Relative name.
+ ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+ ac_top_srcdir=$ac_top_build_prefix$srcdir
+ ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+ cd "$ac_dir" || { ac_status=$?; continue; }
+ # Check for guested configure.
+ if test -f "$ac_srcdir/configure.gnu"; then
+ echo &&
+ $SHELL "$ac_srcdir/configure.gnu" --help=recursive
+ elif test -f "$ac_srcdir/configure"; then
+ echo &&
+ $SHELL "$ac_srcdir/configure" --help=recursive
+ else
+ $as_echo "$as_me: WARNING: no configuration information is in $ac_dir" >&2
+ fi || ac_status=$?
+ cd "$ac_pwd" || { ac_status=$?; break; }
+ done
+fi
+
+test -n "$ac_init_help" && exit $ac_status
+if $ac_init_version; then
+ cat <<\_ACEOF
+less configure 1
+generated by GNU Autoconf 2.69
+
+Copyright (C) 2012 Free Software Foundation, Inc.
+This configure script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it.
+_ACEOF
+ exit
+fi
+
+## ------------------------ ##
+## Autoconf initialization. ##
+## ------------------------ ##
+
+# ac_fn_c_try_compile LINENO
+# --------------------------
+# Try to compile conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_compile ()
+{
+ as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ rm -f conftest.$ac_objext
+ if { { ac_try="$ac_compile"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_compile") 2>conftest.err
+ ac_status=$?
+ if test -s conftest.err; then
+ grep -v '^ *+' conftest.err >conftest.er1
+ cat conftest.er1 >&5
+ mv -f conftest.er1 conftest.err
+ fi
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; } && {
+ test -z "$ac_c_werror_flag" ||
+ test ! -s conftest.err
+ } && test -s conftest.$ac_objext; then :
+ ac_retval=0
+else
+ $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ ac_retval=1
+fi
+ eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+ as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_compile
+
+# ac_fn_c_try_link LINENO
+# -----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_link ()
+{
+ as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ rm -f conftest.$ac_objext conftest$ac_exeext
+ if { { ac_try="$ac_link"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_link") 2>conftest.err
+ ac_status=$?
+ if test -s conftest.err; then
+ grep -v '^ *+' conftest.err >conftest.er1
+ cat conftest.er1 >&5
+ mv -f conftest.er1 conftest.err
+ fi
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; } && {
+ test -z "$ac_c_werror_flag" ||
+ test ! -s conftest.err
+ } && test -s conftest$ac_exeext && {
+ test "$cross_compiling" = yes ||
+ test -x conftest$ac_exeext
+ }; then :
+ ac_retval=0
+else
+ $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ ac_retval=1
+fi
+ # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
+ # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
+ # interfere with the next link command; also delete a directory that is
+ # left behind by Apple's compiler. We do this before executing the actions.
+ rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+ eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+ as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_link
+
+# ac_fn_c_try_cpp LINENO
+# ----------------------
+# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_cpp ()
+{
+ as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ if { { ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
+ ac_status=$?
+ if test -s conftest.err; then
+ grep -v '^ *+' conftest.err >conftest.er1
+ cat conftest.er1 >&5
+ mv -f conftest.er1 conftest.err
+ fi
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; } > conftest.i && {
+ test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+ test ! -s conftest.err
+ }; then :
+ ac_retval=0
+else
+ $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ ac_retval=1
+fi
+ eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+ as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_cpp
+
+# ac_fn_c_try_run LINENO
+# ----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
+# that executables *can* be run.
+ac_fn_c_try_run ()
+{
+ as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ if { { ac_try="$ac_link"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_link") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
+ { { case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_try") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }; then :
+ ac_retval=0
+else
+ $as_echo "$as_me: program exited with status $ac_status" >&5
+ $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ ac_retval=$ac_status
+fi
+ rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+ eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+ as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_run
+
+# ac_fn_c_check_header_mongrel LINENO HEADER VAR INCLUDES
+# -------------------------------------------------------
+# Tests whether HEADER exists, giving a warning if it cannot be compiled using
+# the include files in INCLUDES and setting the cache variable VAR
+# accordingly.
+ac_fn_c_check_header_mongrel ()
+{
+ as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ if eval \${$3+:} false; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+ $as_echo_n "(cached) " >&6
+fi
+eval ac_res=\$$3
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+else
+ # Is the header compilable?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 usability" >&5
+$as_echo_n "checking $2 usability... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_header_compiler=yes
+else
+ ac_header_compiler=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_compiler" >&5
+$as_echo "$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 presence" >&5
+$as_echo_n "checking $2 presence... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <$2>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+ ac_header_preproc=yes
+else
+ ac_header_preproc=no
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_preproc" >&5
+$as_echo "$ac_header_preproc" >&6; }
+
+# So? What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in #((
+ yes:no: )
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&5
+$as_echo "$as_me: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&2;}
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+ ;;
+ no:yes:* )
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: present but cannot be compiled" >&5
+$as_echo "$as_me: WARNING: $2: present but cannot be compiled" >&2;}
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: check for missing prerequisite headers?" >&5
+$as_echo "$as_me: WARNING: $2: check for missing prerequisite headers?" >&2;}
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: see the Autoconf documentation" >&5
+$as_echo "$as_me: WARNING: $2: see the Autoconf documentation" >&2;}
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: section \"Present But Cannot Be Compiled\"" >&5
+$as_echo "$as_me: WARNING: $2: section \"Present But Cannot Be Compiled\"" >&2;}
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+ ;;
+esac
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ eval "$3=\$ac_header_compiler"
+fi
+eval ac_res=\$$3
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+fi
+ eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_header_mongrel
+
+# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
+# -------------------------------------------------------
+# Tests whether HEADER exists and can be compiled using the include files in
+# INCLUDES, setting the cache variable VAR accordingly.
+ac_fn_c_check_header_compile ()
+{
+ as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ eval "$3=yes"
+else
+ eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+ eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_header_compile
+
+# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
+# -------------------------------------------
+# Tests whether TYPE exists after having included INCLUDES, setting cache
+# variable VAR accordingly.
+ac_fn_c_check_type ()
+{
+ as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ eval "$3=no"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+$4
+int
+main ()
+{
+if (sizeof ($2))
+ return 0;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+$4
+int
+main ()
+{
+if (sizeof (($2)))
+ return 0;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+ eval "$3=yes"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+ eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_type
+
+# ac_fn_c_check_func LINENO FUNC VAR
+# ----------------------------------
+# Tests whether FUNC exists, setting the cache variable VAR accordingly
+ac_fn_c_check_func ()
+{
+ as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+/* Define $2 to an innocuous variant, in case <limits.h> declares $2.
+ For example, HP-UX 11i <limits.h> declares gettimeofday. */
+#define $2 innocuous_$2
+
+/* System header to define __stub macros and hopefully few prototypes,
+ which can conflict with char $2 (); below.
+ Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+ <limits.h> exists even on freestanding compilers. */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef $2
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char $2 ();
+/* The GNU C library defines this for functions which it implements
+ to always fail with ENOSYS. Some functions are actually named
+ something starting with __ and the normal name is an alias. */
+#if defined __stub_$2 || defined __stub___$2
+choke me
+#endif
+
+int
+main ()
+{
+return $2 ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ eval "$3=yes"
+else
+ eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+ eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_func
+cat >config.log <<_ACEOF
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+
+It was created by less $as_me 1, which was
+generated by GNU Autoconf 2.69. Invocation command line was
+
+ $ $0 $@
+
+_ACEOF
+exec 5>>config.log
+{
+cat <<_ASUNAME
+## --------- ##
+## Platform. ##
+## --------- ##
+
+hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
+/bin/uname -X = `(/bin/uname -X) 2>/dev/null || echo unknown`
+
+/bin/arch = `(/bin/arch) 2>/dev/null || echo unknown`
+/usr/bin/arch -k = `(/usr/bin/arch -k) 2>/dev/null || echo unknown`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
+/usr/bin/hostinfo = `(/usr/bin/hostinfo) 2>/dev/null || echo unknown`
+/bin/machine = `(/bin/machine) 2>/dev/null || echo unknown`
+/usr/bin/oslevel = `(/usr/bin/oslevel) 2>/dev/null || echo unknown`
+/bin/universe = `(/bin/universe) 2>/dev/null || echo unknown`
+
+_ASUNAME
+
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ $as_echo "PATH: $as_dir"
+ done
+IFS=$as_save_IFS
+
+} >&5
+
+cat >&5 <<_ACEOF
+
+
+## ----------- ##
+## Core tests. ##
+## ----------- ##
+
+_ACEOF
+
+
+# Keep a trace of the command line.
+# Strip out --no-create and --no-recursion so they do not pile up.
+# Strip out --silent because we don't want to record it for future runs.
+# Also quote any args containing shell meta-characters.
+# Make two passes to allow for proper duplicate-argument suppression.
+ac_configure_args=
+ac_configure_args0=
+ac_configure_args1=
+ac_must_keep_next=false
+for ac_pass in 1 2
+do
+ for ac_arg
+ do
+ case $ac_arg in
+ -no-create | --no-c* | -n | -no-recursion | --no-r*) continue ;;
+ -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+ | -silent | --silent | --silen | --sile | --sil)
+ continue ;;
+ *\'*)
+ ac_arg=`$as_echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+ esac
+ case $ac_pass in
+ 1) as_fn_append ac_configure_args0 " '$ac_arg'" ;;
+ 2)
+ as_fn_append ac_configure_args1 " '$ac_arg'"
+ if test $ac_must_keep_next = true; then
+ ac_must_keep_next=false # Got value, back to normal.
+ else
+ case $ac_arg in
+ *=* | --config-cache | -C | -disable-* | --disable-* \
+ | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
+ | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
+ | -with-* | --with-* | -without-* | --without-* | --x)
+ case "$ac_configure_args0 " in
+ "$ac_configure_args1"*" '$ac_arg' "* ) continue ;;
+ esac
+ ;;
+ -* ) ac_must_keep_next=true ;;
+ esac
+ fi
+ as_fn_append ac_configure_args " '$ac_arg'"
+ ;;
+ esac
+ done
+done
+{ ac_configure_args0=; unset ac_configure_args0;}
+{ ac_configure_args1=; unset ac_configure_args1;}
+
+# When interrupted or exit'd, cleanup temporary files, and complete
+# config.log. We remove comments because anyway the quotes in there
+# would cause problems or look ugly.
+# WARNING: Use '\'' to represent an apostrophe within the trap.
+# WARNING: Do not start the trap code with a newline, due to a FreeBSD 4.0 bug.
+trap 'exit_status=$?
+ # Save into config.log some information that might help in debugging.
+ {
+ echo
+
+ $as_echo "## ---------------- ##
+## Cache variables. ##
+## ---------------- ##"
+ echo
+ # The following way of writing the cache mishandles newlines in values,
+(
+ for ac_var in `(set) 2>&1 | sed -n '\''s/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'\''`; do
+ eval ac_val=\$$ac_var
+ case $ac_val in #(
+ *${as_nl}*)
+ case $ac_var in #(
+ *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+ esac
+ case $ac_var in #(
+ _ | IFS | as_nl) ;; #(
+ BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+ *) { eval $ac_var=; unset $ac_var;} ;;
+ esac ;;
+ esac
+ done
+ (set) 2>&1 |
+ case $as_nl`(ac_space='\'' '\''; set) 2>&1` in #(
+ *${as_nl}ac_space=\ *)
+ sed -n \
+ "s/'\''/'\''\\\\'\'''\''/g;
+ s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\''\\2'\''/p"
+ ;; #(
+ *)
+ sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+ ;;
+ esac |
+ sort
+)
+ echo
+
+ $as_echo "## ----------------- ##
+## Output variables. ##
+## ----------------- ##"
+ echo
+ for ac_var in $ac_subst_vars
+ do
+ eval ac_val=\$$ac_var
+ case $ac_val in
+ *\'\''*) ac_val=`$as_echo "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+ esac
+ $as_echo "$ac_var='\''$ac_val'\''"
+ done | sort
+ echo
+
+ if test -n "$ac_subst_files"; then
+ $as_echo "## ------------------- ##
+## File substitutions. ##
+## ------------------- ##"
+ echo
+ for ac_var in $ac_subst_files
+ do
+ eval ac_val=\$$ac_var
+ case $ac_val in
+ *\'\''*) ac_val=`$as_echo "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+ esac
+ $as_echo "$ac_var='\''$ac_val'\''"
+ done | sort
+ echo
+ fi
+
+ if test -s confdefs.h; then
+ $as_echo "## ----------- ##
+## confdefs.h. ##
+## ----------- ##"
+ echo
+ cat confdefs.h
+ echo
+ fi
+ test "$ac_signal" != 0 &&
+ $as_echo "$as_me: caught signal $ac_signal"
+ $as_echo "$as_me: exit $exit_status"
+ } >&5
+ rm -f core *.core core.conftest.* &&
+ rm -f -r conftest* confdefs* conf$$* $ac_clean_files &&
+ exit $exit_status
+' 0
+for ac_signal in 1 2 13 15; do
+ trap 'ac_signal='$ac_signal'; as_fn_exit 1' $ac_signal
+done
+ac_signal=0
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -f -r conftest* confdefs.h
+
+$as_echo "/* confdefs.h */" > confdefs.h
+
+# Predefined preprocessor variables.
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_NAME "$PACKAGE_NAME"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_TARNAME "$PACKAGE_TARNAME"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_VERSION "$PACKAGE_VERSION"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_STRING "$PACKAGE_STRING"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_BUGREPORT "$PACKAGE_BUGREPORT"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_URL "$PACKAGE_URL"
+_ACEOF
+
+
+# Let the site file select an alternate cache file if it wants to.
+# Prefer an explicitly selected file to automatically selected ones.
+ac_site_file1=NONE
+ac_site_file2=NONE
+if test -n "$CONFIG_SITE"; then
+ # We do not want a PATH search for config.site.
+ case $CONFIG_SITE in #((
+ -*) ac_site_file1=./$CONFIG_SITE;;
+ */*) ac_site_file1=$CONFIG_SITE;;
+ *) ac_site_file1=./$CONFIG_SITE;;
+ esac
+elif test "x$prefix" != xNONE; then
+ ac_site_file1=$prefix/share/config.site
+ ac_site_file2=$prefix/etc/config.site
+else
+ ac_site_file1=$ac_default_prefix/share/config.site
+ ac_site_file2=$ac_default_prefix/etc/config.site
+fi
+for ac_site_file in "$ac_site_file1" "$ac_site_file2"
+do
+ test "x$ac_site_file" = xNONE && continue
+ if test /dev/null != "$ac_site_file" && test -r "$ac_site_file"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
+$as_echo "$as_me: loading site script $ac_site_file" >&6;}
+ sed 's/^/| /' "$ac_site_file" >&5
+ . "$ac_site_file" \
+ || { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "failed to load site script $ac_site_file
+See \`config.log' for more details" "$LINENO" 5; }
+ fi
+done
+
+if test -r "$cache_file"; then
+ # Some versions of bash will fail to source /dev/null (special files
+ # actually), so we avoid doing that. DJGPP emulates it as a regular file.
+ if test /dev/null != "$cache_file" && test -f "$cache_file"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
+$as_echo "$as_me: loading cache $cache_file" >&6;}
+ case $cache_file in
+ [\\/]* | ?:[\\/]* ) . "$cache_file";;
+ *) . "./$cache_file";;
+ esac
+ fi
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
+$as_echo "$as_me: creating cache $cache_file" >&6;}
+ >$cache_file
+fi
+
+# Check that the precious variables saved in the cache have kept the same
+# value.
+ac_cache_corrupted=false
+for ac_var in $ac_precious_vars; do
+ eval ac_old_set=\$ac_cv_env_${ac_var}_set
+ eval ac_new_set=\$ac_env_${ac_var}_set
+ eval ac_old_val=\$ac_cv_env_${ac_var}_value
+ eval ac_new_val=\$ac_env_${ac_var}_value
+ case $ac_old_set,$ac_new_set in
+ set,)
+ { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
+$as_echo "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
+ ac_cache_corrupted=: ;;
+ ,set)
+ { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
+$as_echo "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
+ ac_cache_corrupted=: ;;
+ ,);;
+ *)
+ if test "x$ac_old_val" != "x$ac_new_val"; then
+ # differences in whitespace do not lead to failure.
+ ac_old_val_w=`echo x $ac_old_val`
+ ac_new_val_w=`echo x $ac_new_val`
+ if test "$ac_old_val_w" != "$ac_new_val_w"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
+$as_echo "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
+ ac_cache_corrupted=:
+ else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
+$as_echo "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
+ eval $ac_var=\$ac_old_val
+ fi
+ { $as_echo "$as_me:${as_lineno-$LINENO}: former value: \`$ac_old_val'" >&5
+$as_echo "$as_me: former value: \`$ac_old_val'" >&2;}
+ { $as_echo "$as_me:${as_lineno-$LINENO}: current value: \`$ac_new_val'" >&5
+$as_echo "$as_me: current value: \`$ac_new_val'" >&2;}
+ fi;;
+ esac
+ # Pass precious variables to config.status.
+ if test "$ac_new_set" = set; then
+ case $ac_new_val in
+ *\'*) ac_arg=$ac_var=`$as_echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
+ *) ac_arg=$ac_var=$ac_new_val ;;
+ esac
+ case " $ac_configure_args " in
+ *" '$ac_arg' "*) ;; # Avoid dups. Use of quotes ensures accuracy.
+ *) as_fn_append ac_configure_args " '$ac_arg'" ;;
+ esac
+ fi
+done
+if $ac_cache_corrupted; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+ { $as_echo "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
+$as_echo "$as_me: error: changes in the environment can compromise the build" >&2;}
+ as_fn_error $? "run \`make distclean' and/or \`rm $cache_file' and start over" "$LINENO" 5
+fi
+## -------------------- ##
+## Main body of script. ##
+## -------------------- ##
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+ac_config_headers="$ac_config_headers defines.h"
+
+
+# Checks for programs.
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+if test -n "$ac_tool_prefix"; then
+ # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}gcc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_CC+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test -n "$CC"; then
+ ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ ac_cv_prog_CC="${ac_tool_prefix}gcc"
+ $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+ break 2
+ fi
+done
+ done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+ ac_ct_CC=$CC
+ # Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_CC+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test -n "$ac_ct_CC"; then
+ ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ ac_cv_prog_ac_ct_CC="gcc"
+ $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+ break 2
+ fi
+done
+ done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+$as_echo "$ac_ct_CC" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+ if test "x$ac_ct_CC" = x; then
+ CC=""
+ else
+ case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+ CC=$ac_ct_CC
+ fi
+else
+ CC="$ac_cv_prog_CC"
+fi
+
+if test -z "$CC"; then
+ if test -n "$ac_tool_prefix"; then
+ # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}cc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_CC+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test -n "$CC"; then
+ ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ ac_cv_prog_CC="${ac_tool_prefix}cc"
+ $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+ break 2
+ fi
+done
+ done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+ fi
+fi
+if test -z "$CC"; then
+ # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_CC+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test -n "$CC"; then
+ ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+ ac_prog_rejected=no
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
+ ac_prog_rejected=yes
+ continue
+ fi
+ ac_cv_prog_CC="cc"
+ $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+ break 2
+ fi
+done
+ done
+IFS=$as_save_IFS
+
+if test $ac_prog_rejected = yes; then
+ # We found a bogon in the path, so make sure we never use it.
+ set dummy $ac_cv_prog_CC
+ shift
+ if test $# != 0; then
+ # We chose a different compiler from the bogus one.
+ # However, it has the same basename, so the bogon will be chosen
+ # first if we set CC to just the basename; use the full file name.
+ shift
+ ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@"
+ fi
+fi
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$CC"; then
+ if test -n "$ac_tool_prefix"; then
+ for ac_prog in cl.exe
+ do
+ # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_CC+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test -n "$CC"; then
+ ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
+ $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+ break 2
+ fi
+done
+ done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+ test -n "$CC" && break
+ done
+fi
+if test -z "$CC"; then
+ ac_ct_CC=$CC
+ for ac_prog in cl.exe
+do
+ # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_CC+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test -n "$ac_ct_CC"; then
+ ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ ac_cv_prog_ac_ct_CC="$ac_prog"
+ $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+ break 2
+ fi
+done
+ done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+$as_echo "$ac_ct_CC" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+ test -n "$ac_ct_CC" && break
+done
+
+ if test "x$ac_ct_CC" = x; then
+ CC=""
+ else
+ case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+ CC=$ac_ct_CC
+ fi
+fi
+
+fi
+
+
+test -z "$CC" && { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "no acceptable C compiler found in \$PATH
+See \`config.log' for more details" "$LINENO" 5; }
+
+# Provide some information about the compiler.
+$as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
+set X $ac_compile
+ac_compiler=$2
+for ac_option in --version -v -V -qversion; do
+ { { ac_try="$ac_compiler $ac_option >&5"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_compiler $ac_option >&5") 2>conftest.err
+ ac_status=$?
+ if test -s conftest.err; then
+ sed '10a\
+... rest of stderr output deleted ...
+ 10q' conftest.err >conftest.er1
+ cat conftest.er1 >&5
+ fi
+ rm -f conftest.er1 conftest.err
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }
+done
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out"
+# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compilers, and finding out an intuition
+# of exeext.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
+$as_echo_n "checking whether the C compiler works... " >&6; }
+ac_link_default=`$as_echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
+
+# The possible output files:
+ac_files="a.out conftest.exe conftest a.exe a_out.exe b.out conftest.*"
+
+ac_rmfiles=
+for ac_file in $ac_files
+do
+ case $ac_file in
+ *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
+ * ) ac_rmfiles="$ac_rmfiles $ac_file";;
+ esac
+done
+rm -f $ac_rmfiles
+
+if { { ac_try="$ac_link_default"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_link_default") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; then :
+ # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
+# So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
+# in a Makefile. We should not override ac_cv_exeext if it was cached,
+# so that the user can short-circuit this test for compilers unknown to
+# Autoconf.
+for ac_file in $ac_files ''
+do
+ test -f "$ac_file" || continue
+ case $ac_file in
+ *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj )
+ ;;
+ [ab].out )
+ # We found the default executable, but exeext='' is most
+ # certainly right.
+ break;;
+ *.* )
+ if test "${ac_cv_exeext+set}" = set && test "$ac_cv_exeext" != no;
+ then :; else
+ ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+ fi
+ # We set ac_cv_exeext here because the later test for it is not
+ # safe: cross compilers may not add the suffix if given an `-o'
+ # argument, so we may need to know it at that point already.
+ # Even if this section looks crufty: it has the advantage of
+ # actually working.
+ break;;
+ * )
+ break;;
+ esac
+done
+test "$ac_cv_exeext" = no && ac_cv_exeext=
+
+else
+ ac_file=''
+fi
+if test -z "$ac_file"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+$as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "C compiler cannot create executables
+See \`config.log' for more details" "$LINENO" 5; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
+$as_echo_n "checking for C compiler default output file name... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
+$as_echo "$ac_file" >&6; }
+ac_exeext=$ac_cv_exeext
+
+rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out
+ac_clean_files=$ac_clean_files_save
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
+$as_echo_n "checking for suffix of executables... " >&6; }
+if { { ac_try="$ac_link"
+case "(($ac_try" in
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+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
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+ (eval "$ac_link") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; then :
+ # If both `conftest.exe' and `conftest' are `present' (well, observable)
+# catch `conftest.exe'. For instance with Cygwin, `ls conftest' will
+# work properly (i.e., refer to `conftest.exe'), while it won't with
+# `rm'.
+for ac_file in conftest.exe conftest conftest.*; do
+ test -f "$ac_file" || continue
+ case $ac_file in
+ *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
+ *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+ break;;
+ * ) break;;
+ esac
+done
+else
+ { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of executables: cannot compile and link
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+rm -f conftest conftest$ac_cv_exeext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
+$as_echo "$ac_cv_exeext" >&6; }
+
+rm -f conftest.$ac_ext
+EXEEXT=$ac_cv_exeext
+ac_exeext=$EXEEXT
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <stdio.h>
+int
+main ()
+{
+FILE *f = fopen ("conftest.out", "w");
+ return ferror (f) || fclose (f) != 0;
+
+ ;
+ return 0;
+}
+_ACEOF
+ac_clean_files="$ac_clean_files conftest.out"
+# Check that the compiler produces executables we can run. If not, either
+# the compiler is broken, or we cross compile.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+$as_echo_n "checking whether we are cross compiling... " >&6; }
+if test "$cross_compiling" != yes; then
+ { { ac_try="$ac_link"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_link") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }
+ if { ac_try='./conftest$ac_cv_exeext'
+ { { case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_try") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }; then
+ cross_compiling=no
+ else
+ if test "$cross_compiling" = maybe; then
+ cross_compiling=yes
+ else
+ { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run C compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details" "$LINENO" 5; }
+ fi
+ fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+$as_echo "$cross_compiling" >&6; }
+
+rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
+ac_clean_files=$ac_clean_files_save
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
+$as_echo_n "checking for suffix of object files... " >&6; }
+if ${ac_cv_objext+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.o conftest.obj
+if { { ac_try="$ac_compile"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_compile") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; then :
+ for ac_file in conftest.o conftest.obj conftest.*; do
+ test -f "$ac_file" || continue;
+ case $ac_file in
+ *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM ) ;;
+ *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`
+ break;;
+ esac
+done
+else
+ $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of object files: cannot compile
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+rm -f conftest.$ac_cv_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
+$as_echo "$ac_cv_objext" >&6; }
+OBJEXT=$ac_cv_objext
+ac_objext=$OBJEXT
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5
+$as_echo_n "checking whether we are using the GNU C compiler... " >&6; }
+if ${ac_cv_c_compiler_gnu+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+#ifndef __GNUC__
+ choke me
+#endif
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_compiler_gnu=yes
+else
+ ac_compiler_gnu=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_cv_c_compiler_gnu=$ac_compiler_gnu
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
+$as_echo "$ac_cv_c_compiler_gnu" >&6; }
+if test $ac_compiler_gnu = yes; then
+ GCC=yes
+else
+ GCC=
+fi
+ac_test_CFLAGS=${CFLAGS+set}
+ac_save_CFLAGS=$CFLAGS
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
+$as_echo_n "checking whether $CC accepts -g... " >&6; }
+if ${ac_cv_prog_cc_g+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_save_c_werror_flag=$ac_c_werror_flag
+ ac_c_werror_flag=yes
+ ac_cv_prog_cc_g=no
+ CFLAGS="-g"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_prog_cc_g=yes
+else
+ CFLAGS=""
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+ ac_c_werror_flag=$ac_save_c_werror_flag
+ CFLAGS="-g"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_prog_cc_g=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ac_c_werror_flag=$ac_save_c_werror_flag
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
+$as_echo "$ac_cv_prog_cc_g" >&6; }
+if test "$ac_test_CFLAGS" = set; then
+ CFLAGS=$ac_save_CFLAGS
+elif test $ac_cv_prog_cc_g = yes; then
+ if test "$GCC" = yes; then
+ CFLAGS="-g -O2"
+ else
+ CFLAGS="-g"
+ fi
+else
+ if test "$GCC" = yes; then
+ CFLAGS="-O2"
+ else
+ CFLAGS=
+ fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
+$as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
+if ${ac_cv_prog_cc_c89+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_cv_prog_cc_c89=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <stdarg.h>
+#include <stdio.h>
+struct stat;
+/* Most of the following tests are stolen from RCS 5.7's src/conf.sh. */
+struct buf { int x; };
+FILE * (*rcsopen) (struct buf *, struct stat *, int);
+static char *e (p, i)
+ char **p;
+ int i;
+{
+ return p[i];
+}
+static char *f (char * (*g) (char **, int), char **p, ...)
+{
+ char *s;
+ va_list v;
+ va_start (v,p);
+ s = g (p, va_arg (v,int));
+ va_end (v);
+ return s;
+}
+
+/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default. It has
+ function prototypes and stuff, but not '\xHH' hex character constants.
+ These don't provoke an error unfortunately, instead are silently treated
+ as 'x'. The following induces an error, until -std is added to get
+ proper ANSI mode. Curiously '\x00'!='x' always comes out true, for an
+ array size at least. It's necessary to write '\x00'==0 to get something
+ that's true only with -std. */
+int osf4_cc_array ['\x00' == 0 ? 1 : -1];
+
+/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
+ inside strings and character constants. */
+#define FOO(x) 'x'
+int xlc6_cc_array[FOO(a) == 'x' ? 1 : -1];
+
+int test (int i, double x);
+struct s1 {int (*f) (int a);};
+struct s2 {int (*f) (double a);};
+int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
+int argc;
+char **argv;
+int
+main ()
+{
+return f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1];
+ ;
+ return 0;
+}
+_ACEOF
+for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std \
+ -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+do
+ CC="$ac_save_CC $ac_arg"
+ if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_prog_cc_c89=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext
+ test "x$ac_cv_prog_cc_c89" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+
+fi
+# AC_CACHE_VAL
+case "x$ac_cv_prog_cc_c89" in
+ x)
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+$as_echo "none needed" >&6; } ;;
+ xno)
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+$as_echo "unsupported" >&6; } ;;
+ *)
+ CC="$CC $ac_cv_prog_cc_c89"
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+$as_echo "$ac_cv_prog_cc_c89" >&6; } ;;
+esac
+if test "x$ac_cv_prog_cc_c89" != xno; then :
+
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing strerror" >&5
+$as_echo_n "checking for library containing strerror... " >&6; }
+if ${ac_cv_search_strerror+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char strerror ();
+int
+main ()
+{
+return strerror ();
+ ;
+ return 0;
+}
+_ACEOF
+for ac_lib in '' cposix; do
+ if test -z "$ac_lib"; then
+ ac_res="none required"
+ else
+ ac_res=-l$ac_lib
+ LIBS="-l$ac_lib $ac_func_search_save_LIBS"
+ fi
+ if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_search_strerror=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext
+ if ${ac_cv_search_strerror+:} false; then :
+ break
+fi
+done
+if ${ac_cv_search_strerror+:} false; then :
+
+else
+ ac_cv_search_strerror=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_strerror" >&5
+$as_echo "$ac_cv_search_strerror" >&6; }
+ac_res=$ac_cv_search_strerror
+if test "$ac_res" != no; then :
+ test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
+$as_echo_n "checking how to run the C preprocessor... " >&6; }
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+ CPP=
+fi
+if test -z "$CPP"; then
+ if ${ac_cv_prog_CPP+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ # Double quotes because CPP needs to be expanded
+ for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"
+ do
+ ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+ # Use a header file that comes with gcc, so configuring glibc
+ # with a fresh cross-compiler works.
+ # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+ # <limits.h> exists even on freestanding compilers.
+ # On the NeXT, cc -E runs the code through the compiler's parser,
+ # not just through cpp. "Syntax error" is here to catch this case.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+ Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+
+else
+ # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+ # OK, works on sane cases. Now check whether nonexistent headers
+ # can be detected and how.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+ # Broken: success on invalid input.
+continue
+else
+ # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then :
+ break
+fi
+
+ done
+ ac_cv_prog_CPP=$CPP
+
+fi
+ CPP=$ac_cv_prog_CPP
+else
+ ac_cv_prog_CPP=$CPP
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
+$as_echo "$CPP" >&6; }
+ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+ # Use a header file that comes with gcc, so configuring glibc
+ # with a fresh cross-compiler works.
+ # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+ # <limits.h> exists even on freestanding compilers.
+ # On the NeXT, cc -E runs the code through the compiler's parser,
+ # not just through cpp. "Syntax error" is here to catch this case.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+ Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+
+else
+ # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+ # OK, works on sane cases. Now check whether nonexistent headers
+ # can be detected and how.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+ # Broken: success on invalid input.
+continue
+else
+ # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then :
+
+else
+ { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
+$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
+if ${ac_cv_path_GREP+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test -z "$GREP"; then
+ ac_path_GREP_found=false
+ # Loop through the user's path and test for each of PROGNAME-LIST
+ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_prog in grep ggrep; do
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
+ as_fn_executable_p "$ac_path_GREP" || continue
+# Check for GNU ac_path_GREP and select it if it is found.
+ # Check for GNU $ac_path_GREP
+case `"$ac_path_GREP" --version 2>&1` in
+*GNU*)
+ ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
+*)
+ ac_count=0
+ $as_echo_n 0123456789 >"conftest.in"
+ while :
+ do
+ cat "conftest.in" "conftest.in" >"conftest.tmp"
+ mv "conftest.tmp" "conftest.in"
+ cp "conftest.in" "conftest.nl"
+ $as_echo 'GREP' >> "conftest.nl"
+ "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+ diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+ as_fn_arith $ac_count + 1 && ac_count=$as_val
+ if test $ac_count -gt ${ac_path_GREP_max-0}; then
+ # Best one so far, save it but keep looking for a better one
+ ac_cv_path_GREP="$ac_path_GREP"
+ ac_path_GREP_max=$ac_count
+ fi
+ # 10*(2^10) chars as input seems more than enough
+ test $ac_count -gt 10 && break
+ done
+ rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+ $ac_path_GREP_found && break 3
+ done
+ done
+ done
+IFS=$as_save_IFS
+ if test -z "$ac_cv_path_GREP"; then
+ as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+ fi
+else
+ ac_cv_path_GREP=$GREP
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
+$as_echo "$ac_cv_path_GREP" >&6; }
+ GREP="$ac_cv_path_GREP"
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
+$as_echo_n "checking for egrep... " >&6; }
+if ${ac_cv_path_EGREP+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
+ then ac_cv_path_EGREP="$GREP -E"
+ else
+ if test -z "$EGREP"; then
+ ac_path_EGREP_found=false
+ # Loop through the user's path and test for each of PROGNAME-LIST
+ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_prog in egrep; do
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
+ as_fn_executable_p "$ac_path_EGREP" || continue
+# Check for GNU ac_path_EGREP and select it if it is found.
+ # Check for GNU $ac_path_EGREP
+case `"$ac_path_EGREP" --version 2>&1` in
+*GNU*)
+ ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
+*)
+ ac_count=0
+ $as_echo_n 0123456789 >"conftest.in"
+ while :
+ do
+ cat "conftest.in" "conftest.in" >"conftest.tmp"
+ mv "conftest.tmp" "conftest.in"
+ cp "conftest.in" "conftest.nl"
+ $as_echo 'EGREP' >> "conftest.nl"
+ "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+ diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+ as_fn_arith $ac_count + 1 && ac_count=$as_val
+ if test $ac_count -gt ${ac_path_EGREP_max-0}; then
+ # Best one so far, save it but keep looking for a better one
+ ac_cv_path_EGREP="$ac_path_EGREP"
+ ac_path_EGREP_max=$ac_count
+ fi
+ # 10*(2^10) chars as input seems more than enough
+ test $ac_count -gt 10 && break
+ done
+ rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+ $ac_path_EGREP_found && break 3
+ done
+ done
+ done
+IFS=$as_save_IFS
+ if test -z "$ac_cv_path_EGREP"; then
+ as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+ fi
+else
+ ac_cv_path_EGREP=$EGREP
+fi
+
+ fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
+$as_echo "$ac_cv_path_EGREP" >&6; }
+ EGREP="$ac_cv_path_EGREP"
+
+
+if test $ac_cv_c_compiler_gnu = yes; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC needs -traditional" >&5
+$as_echo_n "checking whether $CC needs -traditional... " >&6; }
+if ${ac_cv_prog_gcc_traditional+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_pattern="Autoconf.*'x'"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sgtty.h>
+Autoconf TIOCGETP
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "$ac_pattern" >/dev/null 2>&1; then :
+ ac_cv_prog_gcc_traditional=yes
+else
+ ac_cv_prog_gcc_traditional=no
+fi
+rm -f conftest*
+
+
+ if test $ac_cv_prog_gcc_traditional = no; then
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <termio.h>
+Autoconf TCGETA
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "$ac_pattern" >/dev/null 2>&1; then :
+ ac_cv_prog_gcc_traditional=yes
+fi
+rm -f conftest*
+
+ fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_gcc_traditional" >&5
+$as_echo "$ac_cv_prog_gcc_traditional" >&6; }
+ if test $ac_cv_prog_gcc_traditional = yes; then
+ CC="$CC -traditional"
+ fi
+fi
+
+ac_aux_dir=
+for ac_dir in "$srcdir" "$srcdir/.." "$srcdir/../.."; do
+ if test -f "$ac_dir/install-sh"; then
+ ac_aux_dir=$ac_dir
+ ac_install_sh="$ac_aux_dir/install-sh -c"
+ break
+ elif test -f "$ac_dir/install.sh"; then
+ ac_aux_dir=$ac_dir
+ ac_install_sh="$ac_aux_dir/install.sh -c"
+ break
+ elif test -f "$ac_dir/shtool"; then
+ ac_aux_dir=$ac_dir
+ ac_install_sh="$ac_aux_dir/shtool install -c"
+ break
+ fi
+done
+if test -z "$ac_aux_dir"; then
+ as_fn_error $? "cannot find install-sh, install.sh, or shtool in \"$srcdir\" \"$srcdir/..\" \"$srcdir/../..\"" "$LINENO" 5
+fi
+
+# These three variables are undocumented and unsupported,
+# and are intended to be withdrawn in a future Autoconf release.
+# They can cause serious problems if a builder's source tree is in a directory
+# whose full name contains unusual characters.
+ac_config_guess="$SHELL $ac_aux_dir/config.guess" # Please don't use this var.
+ac_config_sub="$SHELL $ac_aux_dir/config.sub" # Please don't use this var.
+ac_configure="$SHELL $ac_aux_dir/configure" # Please don't use this var.
+
+
+# Find a good install program. We prefer a C program (faster),
+# so one script is as good as another. But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AmigaOS /C/install, which installs bootblocks on floppy discs
+# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# OS/2's system install, which has a completely different semantic
+# ./install, which can be erroneously created by make from ./install.sh.
+# Reject install programs that cannot install multiple files.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
+$as_echo_n "checking for a BSD-compatible install... " >&6; }
+if test -z "$INSTALL"; then
+if ${ac_cv_path_install+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ # Account for people who put trailing slashes in PATH elements.
+case $as_dir/ in #((
+ ./ | .// | /[cC]/* | \
+ /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
+ ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
+ /usr/ucb/* ) ;;
+ *)
+ # OSF1 and SCO ODT 3.0 have their own names for install.
+ # Don't use installbsd from OSF since it installs stuff as root
+ # by default.
+ for ac_prog in ginstall scoinst install; do
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ if as_fn_executable_p "$as_dir/$ac_prog$ac_exec_ext"; then
+ if test $ac_prog = install &&
+ grep dspmsg "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+ # AIX install. It has an incompatible calling convention.
+ :
+ elif test $ac_prog = install &&
+ grep pwplus "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+ # program-specific install script used by HP pwplus--don't use.
+ :
+ else
+ rm -rf conftest.one conftest.two conftest.dir
+ echo one > conftest.one
+ echo two > conftest.two
+ mkdir conftest.dir
+ if "$as_dir/$ac_prog$ac_exec_ext" -c conftest.one conftest.two "`pwd`/conftest.dir" &&
+ test -s conftest.one && test -s conftest.two &&
+ test -s conftest.dir/conftest.one &&
+ test -s conftest.dir/conftest.two
+ then
+ ac_cv_path_install="$as_dir/$ac_prog$ac_exec_ext -c"
+ break 3
+ fi
+ fi
+ fi
+ done
+ done
+ ;;
+esac
+
+ done
+IFS=$as_save_IFS
+
+rm -rf conftest.one conftest.two conftest.dir
+
+fi
+ if test "${ac_cv_path_install+set}" = set; then
+ INSTALL=$ac_cv_path_install
+ else
+ # As a last resort, use the slow shell script. Don't cache a
+ # value for INSTALL within a source directory, because that will
+ # break other packages using the cache if that directory is
+ # removed, or if the value is a relative name.
+ INSTALL=$ac_install_sh
+ fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
+$as_echo "$INSTALL" >&6; }
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+
+# Checks for compilation model.
+# Check whether --enable-largefile was given.
+if test "${enable_largefile+set}" = set; then :
+ enableval=$enable_largefile;
+fi
+
+if test "$enable_largefile" != no; then
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for special C compiler options needed for large files" >&5
+$as_echo_n "checking for special C compiler options needed for large files... " >&6; }
+if ${ac_cv_sys_largefile_CC+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_cv_sys_largefile_CC=no
+ if test "$GCC" != yes; then
+ ac_save_CC=$CC
+ while :; do
+ # IRIX 6.2 and later do not support large files by default,
+ # so use the C compiler's -n32 option if that helps.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
+ since some C++ compilers masquerading as C compilers
+ incorrectly reject 9223372036854775807. */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+ && LARGE_OFF_T % 2147483647 == 1)
+ ? 1 : -1];
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+ if ac_fn_c_try_compile "$LINENO"; then :
+ break
+fi
+rm -f core conftest.err conftest.$ac_objext
+ CC="$CC -n32"
+ if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_sys_largefile_CC=' -n32'; break
+fi
+rm -f core conftest.err conftest.$ac_objext
+ break
+ done
+ CC=$ac_save_CC
+ rm -f conftest.$ac_ext
+ fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_CC" >&5
+$as_echo "$ac_cv_sys_largefile_CC" >&6; }
+ if test "$ac_cv_sys_largefile_CC" != no; then
+ CC=$CC$ac_cv_sys_largefile_CC
+ fi
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _FILE_OFFSET_BITS value needed for large files" >&5
+$as_echo_n "checking for _FILE_OFFSET_BITS value needed for large files... " >&6; }
+if ${ac_cv_sys_file_offset_bits+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ while :; do
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
+ since some C++ compilers masquerading as C compilers
+ incorrectly reject 9223372036854775807. */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+ && LARGE_OFF_T % 2147483647 == 1)
+ ? 1 : -1];
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_sys_file_offset_bits=no; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#define _FILE_OFFSET_BITS 64
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
+ since some C++ compilers masquerading as C compilers
+ incorrectly reject 9223372036854775807. */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+ && LARGE_OFF_T % 2147483647 == 1)
+ ? 1 : -1];
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_sys_file_offset_bits=64; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ac_cv_sys_file_offset_bits=unknown
+ break
+done
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_file_offset_bits" >&5
+$as_echo "$ac_cv_sys_file_offset_bits" >&6; }
+case $ac_cv_sys_file_offset_bits in #(
+ no | unknown) ;;
+ *)
+cat >>confdefs.h <<_ACEOF
+#define _FILE_OFFSET_BITS $ac_cv_sys_file_offset_bits
+_ACEOF
+;;
+esac
+rm -rf conftest*
+ if test $ac_cv_sys_file_offset_bits = unknown; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _LARGE_FILES value needed for large files" >&5
+$as_echo_n "checking for _LARGE_FILES value needed for large files... " >&6; }
+if ${ac_cv_sys_large_files+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ while :; do
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
+ since some C++ compilers masquerading as C compilers
+ incorrectly reject 9223372036854775807. */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+ && LARGE_OFF_T % 2147483647 == 1)
+ ? 1 : -1];
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_sys_large_files=no; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#define _LARGE_FILES 1
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
+ since some C++ compilers masquerading as C compilers
+ incorrectly reject 9223372036854775807. */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+ && LARGE_OFF_T % 2147483647 == 1)
+ ? 1 : -1];
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_sys_large_files=1; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ac_cv_sys_large_files=unknown
+ break
+done
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_large_files" >&5
+$as_echo "$ac_cv_sys_large_files" >&6; }
+case $ac_cv_sys_large_files in #(
+ no | unknown) ;;
+ *)
+cat >>confdefs.h <<_ACEOF
+#define _LARGE_FILES $ac_cv_sys_large_files
+_ACEOF
+;;
+esac
+rm -rf conftest*
+ fi
+
+
+fi
+
+
+# Checks for general libraries.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for tgoto in -ltinfo" >&5
+$as_echo_n "checking for tgoto in -ltinfo... " >&6; }
+if ${ac_cv_lib_tinfo_tgoto+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-ltinfo $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char tgoto ();
+int
+main ()
+{
+return tgoto ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_lib_tinfo_tgoto=yes
+else
+ ac_cv_lib_tinfo_tgoto=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_tinfo_tgoto" >&5
+$as_echo "$ac_cv_lib_tinfo_tgoto" >&6; }
+if test "x$ac_cv_lib_tinfo_tgoto" = xyes; then :
+ have_tinfo=yes
+else
+ have_tinfo=no
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for initscr in -lxcurses" >&5
+$as_echo_n "checking for initscr in -lxcurses... " >&6; }
+if ${ac_cv_lib_xcurses_initscr+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-lxcurses $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char initscr ();
+int
+main ()
+{
+return initscr ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_lib_xcurses_initscr=yes
+else
+ ac_cv_lib_xcurses_initscr=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_xcurses_initscr" >&5
+$as_echo "$ac_cv_lib_xcurses_initscr" >&6; }
+if test "x$ac_cv_lib_xcurses_initscr" = xyes; then :
+ have_xcurses=yes
+else
+ have_xcurses=no
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for initscr in -lncursesw" >&5
+$as_echo_n "checking for initscr in -lncursesw... " >&6; }
+if ${ac_cv_lib_ncursesw_initscr+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-lncursesw $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char initscr ();
+int
+main ()
+{
+return initscr ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_lib_ncursesw_initscr=yes
+else
+ ac_cv_lib_ncursesw_initscr=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_ncursesw_initscr" >&5
+$as_echo "$ac_cv_lib_ncursesw_initscr" >&6; }
+if test "x$ac_cv_lib_ncursesw_initscr" = xyes; then :
+ have_ncursesw=yes
+else
+ have_ncursesw=no
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for initscr in -lncurses" >&5
+$as_echo_n "checking for initscr in -lncurses... " >&6; }
+if ${ac_cv_lib_ncurses_initscr+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-lncurses $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char initscr ();
+int
+main ()
+{
+return initscr ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_lib_ncurses_initscr=yes
+else
+ ac_cv_lib_ncurses_initscr=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_ncurses_initscr" >&5
+$as_echo "$ac_cv_lib_ncurses_initscr" >&6; }
+if test "x$ac_cv_lib_ncurses_initscr" = xyes; then :
+ have_ncurses=yes
+else
+ have_ncurses=no
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for initscr in -lcurses" >&5
+$as_echo_n "checking for initscr in -lcurses... " >&6; }
+if ${ac_cv_lib_curses_initscr+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-lcurses $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char initscr ();
+int
+main ()
+{
+return initscr ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_lib_curses_initscr=yes
+else
+ ac_cv_lib_curses_initscr=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_curses_initscr" >&5
+$as_echo "$ac_cv_lib_curses_initscr" >&6; }
+if test "x$ac_cv_lib_curses_initscr" = xyes; then :
+ have_curses=yes
+else
+ have_curses=no
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for tgetent in -ltermcap" >&5
+$as_echo_n "checking for tgetent in -ltermcap... " >&6; }
+if ${ac_cv_lib_termcap_tgetent+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-ltermcap $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char tgetent ();
+int
+main ()
+{
+return tgetent ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_lib_termcap_tgetent=yes
+else
+ ac_cv_lib_termcap_tgetent=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_termcap_tgetent" >&5
+$as_echo "$ac_cv_lib_termcap_tgetent" >&6; }
+if test "x$ac_cv_lib_termcap_tgetent" = xyes; then :
+ have_termcap=yes
+else
+ have_termcap=no
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for tgetent in -ltermlib" >&5
+$as_echo_n "checking for tgetent in -ltermlib... " >&6; }
+if ${ac_cv_lib_termlib_tgetent+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-ltermlib $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char tgetent ();
+int
+main ()
+{
+return tgetent ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_lib_termlib_tgetent=yes
+else
+ ac_cv_lib_termlib_tgetent=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_termlib_tgetent" >&5
+$as_echo "$ac_cv_lib_termlib_tgetent" >&6; }
+if test "x$ac_cv_lib_termlib_tgetent" = xyes; then :
+ have_termlib=yes
+else
+ have_termlib=no
+fi
+
+# Regular expressions (regcmp) are in -lgen on Solaris 2, (but in libc
+# at least on Solaris 10 (2.10)) and in -lintl on SCO Unix.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing regcmp" >&5
+$as_echo_n "checking for library containing regcmp... " >&6; }
+if ${ac_cv_search_regcmp+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char regcmp ();
+int
+main ()
+{
+return regcmp ();
+ ;
+ return 0;
+}
+_ACEOF
+for ac_lib in '' gen intl PW; do
+ if test -z "$ac_lib"; then
+ ac_res="none required"
+ else
+ ac_res=-l$ac_lib
+ LIBS="-l$ac_lib $ac_func_search_save_LIBS"
+ fi
+ if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_search_regcmp=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext
+ if ${ac_cv_search_regcmp+:} false; then :
+ break
+fi
+done
+if ${ac_cv_search_regcmp+:} false; then :
+
+else
+ ac_cv_search_regcmp=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_regcmp" >&5
+$as_echo "$ac_cv_search_regcmp" >&6; }
+ac_res=$ac_cv_search_regcmp
+if test "$ac_res" != no; then :
+ test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+
+# Checks for terminal libraries
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for working terminal libraries" >&5
+$as_echo_n "checking for working terminal libraries... " >&6; }
+TERMLIBS=
+
+# Check for systems where curses is broken.
+curses_broken=0
+if test x`uname -s` = "xHP-UX" >/dev/null 2>&1; then
+if test x`uname -r` = "xB.11.00" >/dev/null 2>&1; then
+ curses_broken=1
+fi
+if test x`uname -r` = "xB.11.11" >/dev/null 2>&1; then
+ curses_broken=1
+fi
+fi
+
+if test $curses_broken = 0; then
+
+# -- Try tinfo.
+if test "x$TERMLIBS" = x; then
+ if test $have_tinfo = yes; then
+ TERMLIBS="-ltinfo"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ termok=yes
+else
+ termok=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try xcurses.
+if test "x$TERMLIBS" = x; then
+ if test $have_xcurses = yes; then
+ TERMLIBS="-lxcurses"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ termok=yes
+else
+ termok=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try ncursesw.
+if test "x$TERMLIBS" = x; then
+ if test $have_ncursesw = yes; then
+ TERMLIBS="-lncursesw"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ termok=yes
+else
+ termok=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try ncurses.
+if test "x$TERMLIBS" = x; then
+ if test $have_ncurses = yes; then
+ TERMLIBS="-lncurses"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ termok=yes
+else
+ termok=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try curses.
+if test "x$TERMLIBS" = x; then
+ if test $have_curses = yes; then
+ TERMLIBS="-lcurses"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ termok=yes
+else
+ termok=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try curses & termcap.
+if test "x$TERMLIBS" = x; then
+ if test $have_curses = yes; then
+ if test $have_termcap = yes; then
+ TERMLIBS="-lcurses -ltermcap"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ termok=yes
+else
+ termok=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+ fi
+fi
+fi
+
+# -- Try termcap.
+if test "x$TERMLIBS" = x; then
+ if test $have_termcap = yes; then
+ TERMLIBS="-ltermcap"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ termok=yes
+else
+ termok=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try termlib.
+if test "x$TERMLIBS" = x; then
+ if test $have_termlib = yes; then
+ TERMLIBS="-lcurses -ltermlib"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ termok=yes
+else
+ termok=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+if test "x$TERMLIBS" = x; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: Cannot find terminal libraries - configure failed" >&5
+$as_echo "Cannot find terminal libraries - configure failed" >&6; }
+ exit 1
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: using $TERMLIBS" >&5
+$as_echo "using $TERMLIBS" >&6; }
+LIBS="$LIBS $TERMLIBS"
+
+# Checks for header files.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
+$as_echo_n "checking for ANSI C header files... " >&6; }
+if ${ac_cv_header_stdc+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <float.h>
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_header_stdc=yes
+else
+ ac_cv_header_stdc=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+if test $ac_cv_header_stdc = yes; then
+ # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <string.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "memchr" >/dev/null 2>&1; then :
+
+else
+ ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+ # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <stdlib.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "free" >/dev/null 2>&1; then :
+
+else
+ ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+ # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
+ if test "$cross_compiling" = yes; then :
+ :
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <ctype.h>
+#include <stdlib.h>
+#if ((' ' & 0x0FF) == 0x020)
+# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
+# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
+#else
+# define ISLOWER(c) \
+ (('a' <= (c) && (c) <= 'i') \
+ || ('j' <= (c) && (c) <= 'r') \
+ || ('s' <= (c) && (c) <= 'z'))
+# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
+#endif
+
+#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
+int
+main ()
+{
+ int i;
+ for (i = 0; i < 256; i++)
+ if (XOR (islower (i), ISLOWER (i))
+ || toupper (i) != TOUPPER (i))
+ return 2;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+
+else
+ ac_cv_header_stdc=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+ conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5
+$as_echo "$ac_cv_header_stdc" >&6; }
+if test $ac_cv_header_stdc = yes; then
+
+$as_echo "#define STDC_HEADERS 1" >>confdefs.h
+
+fi
+
+# On IRIX 5.3, sys/types and inttypes.h are conflicting.
+for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
+ inttypes.h stdint.h unistd.h
+do :
+ as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+ cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+for ac_header in ctype.h errno.h fcntl.h limits.h stdio.h stdlib.h string.h termcap.h termio.h termios.h time.h unistd.h values.h sys/ioctl.h sys/stream.h wctype.h
+do :
+ as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+ cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+# Checks for typedefs, structures, and compiler characteristics.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether stat file-mode macros are broken" >&5
+$as_echo_n "checking whether stat file-mode macros are broken... " >&6; }
+if ${ac_cv_header_stat_broken+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#if defined S_ISBLK && defined S_IFDIR
+extern char c1[S_ISBLK (S_IFDIR) ? -1 : 1];
+#endif
+
+#if defined S_ISBLK && defined S_IFCHR
+extern char c2[S_ISBLK (S_IFCHR) ? -1 : 1];
+#endif
+
+#if defined S_ISLNK && defined S_IFREG
+extern char c3[S_ISLNK (S_IFREG) ? -1 : 1];
+#endif
+
+#if defined S_ISSOCK && defined S_IFREG
+extern char c4[S_ISSOCK (S_IFREG) ? -1 : 1];
+#endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_header_stat_broken=no
+else
+ ac_cv_header_stat_broken=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stat_broken" >&5
+$as_echo "$ac_cv_header_stat_broken" >&6; }
+if test $ac_cv_header_stat_broken = yes; then
+
+$as_echo "#define STAT_MACROS_BROKEN 1" >>confdefs.h
+
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5
+$as_echo_n "checking for an ANSI C-conforming const... " >&6; }
+if ${ac_cv_c_const+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+#ifndef __cplusplus
+ /* Ultrix mips cc rejects this sort of thing. */
+ typedef int charset[2];
+ const charset cs = { 0, 0 };
+ /* SunOS 4.1.1 cc rejects this. */
+ char const *const *pcpcc;
+ char **ppc;
+ /* NEC SVR4.0.2 mips cc rejects this. */
+ struct point {int x, y;};
+ static struct point const zero = {0,0};
+ /* AIX XL C 1.02.0.0 rejects this.
+ It does not let you subtract one const X* pointer from another in
+ an arm of an if-expression whose if-part is not a constant
+ expression */
+ const char *g = "string";
+ pcpcc = &g + (g ? g-g : 0);
+ /* HPUX 7.0 cc rejects these. */
+ ++pcpcc;
+ ppc = (char**) pcpcc;
+ pcpcc = (char const *const *) ppc;
+ { /* SCO 3.2v4 cc rejects this sort of thing. */
+ char tx;
+ char *t = &tx;
+ char const *s = 0 ? (char *) 0 : (char const *) 0;
+
+ *t++ = 0;
+ if (s) return 0;
+ }
+ { /* Someone thinks the Sun supposedly-ANSI compiler will reject this. */
+ int x[] = {25, 17};
+ const int *foo = &x[0];
+ ++foo;
+ }
+ { /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
+ typedef const int *iptr;
+ iptr p = 0;
+ ++p;
+ }
+ { /* AIX XL C 1.02.0.0 rejects this sort of thing, saying
+ "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
+ struct s { int j; const int *ap[3]; } bx;
+ struct s *b = &bx; b->j = 5;
+ }
+ { /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
+ const int foo = 10;
+ if (!foo) return 0;
+ }
+ return !cs[0] && !zero.x;
+#endif
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_c_const=yes
+else
+ ac_cv_c_const=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_const" >&5
+$as_echo "$ac_cv_c_const" >&6; }
+if test $ac_cv_c_const = no; then
+
+$as_echo "#define const /**/" >>confdefs.h
+
+fi
+
+ac_fn_c_check_type "$LINENO" "off_t" "ac_cv_type_off_t" "$ac_includes_default"
+if test "x$ac_cv_type_off_t" = xyes; then :
+
+else
+
+cat >>confdefs.h <<_ACEOF
+#define off_t long int
+_ACEOF
+
+fi
+
+ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
+if test "x$ac_cv_type_size_t" = xyes; then :
+
+else
+
+cat >>confdefs.h <<_ACEOF
+#define size_t unsigned int
+_ACEOF
+
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether time.h and sys/time.h may both be included" >&5
+$as_echo_n "checking whether time.h and sys/time.h may both be included... " >&6; }
+if ${ac_cv_header_time+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/types.h>
+#include <sys/time.h>
+#include <time.h>
+
+int
+main ()
+{
+if ((struct tm *) 0)
+return 0;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_header_time=yes
+else
+ ac_cv_header_time=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_time" >&5
+$as_echo "$ac_cv_header_time" >&6; }
+if test $ac_cv_header_time = yes; then
+
+$as_echo "#define TIME_WITH_SYS_TIME 1" >>confdefs.h
+
+fi
+
+
+# Autoheader templates for symbols defined later by AC_DEFINE.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+# Checks for identifiers.
+ac_fn_c_check_type "$LINENO" "off_t" "ac_cv_type_off_t" "$ac_includes_default"
+if test "x$ac_cv_type_off_t" = xyes; then :
+
+else
+
+cat >>confdefs.h <<_ACEOF
+#define off_t long int
+_ACEOF
+
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for void" >&5
+$as_echo_n "checking for void... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+void *foo = 0;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_VOID 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for const" >&5
+$as_echo_n "checking for const... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+const int foo = 0;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_CONST 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for time_t" >&5
+$as_echo_n "checking for time_t... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <time.h>
+int
+main ()
+{
+time_t t = 0;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_TIME_T 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for st_ino in struct stat" >&5
+$as_echo_n "checking for st_ino in struct stat... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/types.h>
+#include <sys/stat.h>
+int
+main ()
+{
+struct stat s; dev_t dev = s.st_dev; ino_t ino = s.st_ino;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_STAT_INO 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+# Checks for library functions.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking return type of signal handlers" >&5
+$as_echo_n "checking return type of signal handlers... " >&6; }
+if ${ac_cv_type_signal+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/types.h>
+#include <signal.h>
+
+int
+main ()
+{
+return *(signal (0, 0)) (0) == 1;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_type_signal=int
+else
+ ac_cv_type_signal=void
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_type_signal" >&5
+$as_echo "$ac_cv_type_signal" >&6; }
+
+cat >>confdefs.h <<_ACEOF
+#define RETSIGTYPE $ac_cv_type_signal
+_ACEOF
+
+
+for ac_func in fsync popen _setjmp sigprocmask sigsetmask snprintf stat system fchmod
+do :
+ as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
+ cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+
+# AC_CHECK_FUNCS may not work for inline functions, so test these separately.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for memcpy" >&5
+$as_echo_n "checking for memcpy... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+int
+main ()
+{
+memcpy(0,0,0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_MEMCPY 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for strchr" >&5
+$as_echo_n "checking for strchr... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+int
+main ()
+{
+strchr("x",'x');
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_STRCHR 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for strstr" >&5
+$as_echo_n "checking for strstr... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+int
+main ()
+{
+strstr("x","x");
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_STRSTR 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+# Some systems have termios.h but not the corresponding functions.
+ac_fn_c_check_func "$LINENO" "tcgetattr" "ac_cv_func_tcgetattr"
+if test "x$ac_cv_func_tcgetattr" = xyes; then :
+ $as_echo "#define HAVE_TERMIOS_FUNCS 1" >>confdefs.h
+
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for fileno" >&5
+$as_echo_n "checking for fileno... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if HAVE_STDIO_H
+#include <stdio.h>
+#endif
+int
+main ()
+{
+static int x; x = fileno(stdin);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_FILENO 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for strerror" >&5
+$as_echo_n "checking for strerror... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if HAVE_STDIO_H
+#include <stdio.h>
+#endif
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+int
+main ()
+{
+static char *x; x = strerror(0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_STRERROR 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sys_errlist" >&5
+$as_echo_n "checking for sys_errlist... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+extern char *sys_errlist[]; static char **x; x = sys_errlist;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_SYS_ERRLIST 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+ac_fn_c_check_type "$LINENO" "sigset_t" "ac_cv_type_sigset_t" "#include <signal.h>
+"
+if test "x$ac_cv_type_sigset_t" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_SIGSET_T 1
+_ACEOF
+
+
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sigemptyset" >&5
+$as_echo_n "checking for sigemptyset... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#include <signal.h>
+
+int
+main ()
+{
+sigset_t s; sigemptyset(&s);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_SIGEMPTYSET 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+have_errno=no
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for errno" >&5
+$as_echo_n "checking for errno... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+int
+main ()
+{
+static int x; x = errno;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes - in errno.h" >&5
+$as_echo "yes - in errno.h" >&6; }; $as_echo "#define HAVE_ERRNO 1" >>confdefs.h
+ have_errno=yes
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+if test $have_errno = no; then
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+int
+main ()
+{
+extern int errno; static int x; x = errno;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes - must define" >&5
+$as_echo "yes - must define" >&6; }; $as_echo "#define HAVE_ERRNO 1" >>confdefs.h
+ $as_echo "#define MUST_DEFINE_ERRNO 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for locale" >&5
+$as_echo_n "checking for locale... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <locale.h>
+#include <ctype.h>
+#include <langinfo.h>
+int
+main ()
+{
+setlocale(LC_CTYPE,""); isprint(0); iscntrl(0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_LOCALE 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ctype functions" >&5
+$as_echo_n "checking for ctype functions... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#if HAVE_CTYPE_H
+#include <ctype.h>
+#endif
+int
+main ()
+{
+static int x; x = isupper(x); x = tolower(x); x = toupper(x);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_UPPER_LOWER 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for wctype functions" >&5
+$as_echo_n "checking for wctype functions... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <wctype.h>
+int
+main ()
+{
+iswlower(0); iswupper(0); towlower(0); towupper(0);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_WCTYPE 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+# Checks for external variable ospeed in the termcap library.
+have_ospeed=no
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking termcap for ospeed" >&5
+$as_echo_n "checking termcap for ospeed... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#include <sys/types.h>
+#if HAVE_TERMIOS_H
+#include <termios.h>
+#endif
+#if HAVE_TERMCAP_H
+#include <termcap.h>
+#endif
+int
+main ()
+{
+ospeed = 0;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes - in termcap.h" >&5
+$as_echo "yes - in termcap.h" >&6; }; $as_echo "#define HAVE_OSPEED 1" >>confdefs.h
+ have_ospeed=yes
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+if test $have_ospeed = no; then
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+extern short ospeed; ospeed = 0;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes - must define" >&5
+$as_echo "yes - must define" >&6; }; $as_echo "#define HAVE_OSPEED 1" >>confdefs.h
+ $as_echo "#define MUST_DEFINE_OSPEED 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+fi
+
+# Compile in secure mode?
+
+# Check whether --with-secure was given.
+if test "${with_secure+set}" = set; then :
+ withval=$with_secure; $as_echo "#define SECURE_COMPILE 1" >>confdefs.h
+
+else
+ $as_echo "#define SECURE_COMPILE 0" >>confdefs.h
+
+fi
+
+
+# Should we use floating point?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for floating point" >&5
+$as_echo_n "checking for floating point... " >&6; }
+
+# Check whether --with-no-float was given.
+if test "${with_no_float+set}" = set; then :
+ withval=$with_no_float; WANT_NO_FLOAT=1
+else
+ WANT_NO_FLOAT=0
+fi
+
+if test $WANT_NO_FLOAT = 0; then
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+double f1 = 12.5; double f2 = f1*f1/2.5;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_FLOAT 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled by user" >&5
+$as_echo "disabled by user" >&6; }
+fi
+
+# Checks for regular expression functions.
+have_regex=no
+have_posix_regex=unknown
+supported_regex=""
+
+# Select a regular expression library.
+WANT_REGEX=auto
+
+# Check whether --with-regex was given.
+if test "${with_regex+set}" = set; then :
+ withval=$with_regex; WANT_REGEX="$withval"
+fi
+
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = posix; then
+# Some versions of Solaris have a regcomp() function, but it doesn't work!
+# So we run a test program. If we're cross-compiling, do it the old way.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for POSIX regcomp" >&5
+$as_echo_n "checking for POSIX regcomp... " >&6; }
+if test "$cross_compiling" = yes; then :
+ have_posix_regex=unknown
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#include <sys/types.h>
+#include <regex.h>
+main() { regex_t r; regmatch_t rm; char *text = "xabcy";
+if (regcomp(&r, "abc", 0)) exit(1);
+if (regexec(&r, text, 1, &rm, 0)) exit(1);
+#ifndef __WATCOMC__
+if (rm.rm_so != 1) exit(1); /* check for correct offset */
+#else
+if (rm.rm_sp != text + 1) exit(1); /* check for correct offset */
+#endif
+exit(0); }
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+ have_posix_regex=yes
+else
+ have_posix_regex=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+ conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+if test $have_posix_regex = yes; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+ $as_echo "#define HAVE_POSIX_REGCOMP 1" >>confdefs.h
+ supported_regex="$supported_regex posix"
+ have_regex=yes
+elif test $have_posix_regex = unknown; then
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#include <sys/types.h>
+#include <regex.h>
+int
+main ()
+{
+regex_t *r; regfree(r);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+ $as_echo "#define HAVE_POSIX_REGCOMP 1" >>confdefs.h
+ have_regex=yes; supported_regex="$supported_regex posix"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = pcre; then
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for pcre_compile in -lpcre" >&5
+$as_echo_n "checking for pcre_compile in -lpcre... " >&6; }
+if ${ac_cv_lib_pcre_pcre_compile+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpcre $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char pcre_compile ();
+int
+main ()
+{
+return pcre_compile ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_lib_pcre_pcre_compile=yes
+else
+ ac_cv_lib_pcre_pcre_compile=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pcre_pcre_compile" >&5
+$as_echo "$ac_cv_lib_pcre_pcre_compile" >&6; }
+if test "x$ac_cv_lib_pcre_pcre_compile" = xyes; then :
+ $as_echo "#define HAVE_PCRE 1" >>confdefs.h
+ LIBS="$LIBS -lpcre" have_regex=yes; supported_regex="$supported_regex pcre"
+fi
+
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = gnu; then
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for re_compile_pattern in -lc" >&5
+$as_echo_n "checking for re_compile_pattern in -lc... " >&6; }
+if ${ac_cv_lib_c_re_compile_pattern+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-lc $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char re_compile_pattern ();
+int
+main ()
+{
+return re_compile_pattern ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_cv_lib_c_re_compile_pattern=yes
+else
+ ac_cv_lib_c_re_compile_pattern=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_c_re_compile_pattern" >&5
+$as_echo "$ac_cv_lib_c_re_compile_pattern" >&6; }
+if test "x$ac_cv_lib_c_re_compile_pattern" = xyes; then :
+ $as_echo "#define HAVE_GNU_REGEX 1" >>confdefs.h
+ have_regex=yes; supported_regex="$supported_regex gnu"
+fi
+
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = regcmp; then
+ac_fn_c_check_func "$LINENO" "regcmp" "ac_cv_func_regcmp"
+if test "x$ac_cv_func_regcmp" = xyes; then :
+ $as_echo "#define HAVE_REGCMP 1" >>confdefs.h
+ have_regex=yes; supported_regex="$supported_regex regcmp"
+fi
+
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = regcomp; then
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for V8 regcomp" >&5
+$as_echo_n "checking for V8 regcomp... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#include "regexp.h"
+int
+main ()
+{
+regcomp("");
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }; $as_echo "#define HAVE_V8_REGCOMP 1" >>confdefs.h
+ have_regex=yes; supported_regex="$supported_regex regcomp"
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+fi
+fi
+
+if test $have_regex = no && test -f ${srcdir}/regexp.c; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = regcomp-local; then
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: using V8 regcomp -- local source" >&5
+$as_echo "using V8 regcomp -- local source" >&6; }; $as_echo "#define HAVE_V8_REGCOMP 1" >>confdefs.h
+
+supported_regex="$supported_regex regcomp-local"
+$as_echo "#define HAVE_REGEXEC2 1" >>confdefs.h
+ REGEX_O='regexp.$(O)' have_regex=yes
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = re_comp; then
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for re_comp" >&5
+$as_echo_n "checking for re_comp... " >&6; }
+ac_fn_c_check_func "$LINENO" "re_comp" "ac_cv_func_re_comp"
+if test "x$ac_cv_func_re_comp" = xyes; then :
+ $as_echo "#define HAVE_RE_COMP 1" >>confdefs.h
+ have_regex=yes; supported_regex="$supported_regex re_comp"
+fi
+
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = none; then
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: using no regex" >&5
+$as_echo "using no regex" >&6; }
+else
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cannot find regular expression library" >&5
+$as_echo "$as_me: WARNING: cannot find regular expression library" >&2;}
+fi
+$as_echo "#define NO_REGEX 1" >>confdefs.h
+ supported_regex="$supported_regex none"
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: regular expression library: $supported_regex" >&5
+$as_echo "regular expression library: $supported_regex" >&6; }
+
+
+# Check whether --with-editor was given.
+if test "${with_editor+set}" = set; then :
+ withval=$with_editor; cat >>confdefs.h <<_ACEOF
+#define EDIT_PGM "$withval"
+_ACEOF
+
+else
+ $as_echo "#define EDIT_PGM \"vi\"" >>confdefs.h
+
+fi
+
+
+
+
+ac_config_files="$ac_config_files Makefile"
+
+cat >confcache <<\_ACEOF
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs, see configure's option --config-cache.
+# It is not useful on other systems. If it contains results you don't
+# want to keep, you may remove or edit it.
+#
+# config.status only pays attention to the cache file if you give it
+# the --recheck option to rerun configure.
+#
+# `ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* `ac_cv_foo' will be assigned the
+# following values.
+
+_ACEOF
+
+# The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, we kill variables containing newlines.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
+(
+ for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do
+ eval ac_val=\$$ac_var
+ case $ac_val in #(
+ *${as_nl}*)
+ case $ac_var in #(
+ *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+ esac
+ case $ac_var in #(
+ _ | IFS | as_nl) ;; #(
+ BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+ *) { eval $ac_var=; unset $ac_var;} ;;
+ esac ;;
+ esac
+ done
+
+ (set) 2>&1 |
+ case $as_nl`(ac_space=' '; set) 2>&1` in #(
+ *${as_nl}ac_space=\ *)
+ # `set' does not quote correctly, so add quotes: double-quote
+ # substitution turns \\\\ into \\, and sed turns \\ into \.
+ sed -n \
+ "s/'/'\\\\''/g;
+ s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
+ ;; #(
+ *)
+ # `set' quotes correctly as required by POSIX, so do not add quotes.
+ sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+ ;;
+ esac |
+ sort
+) |
+ sed '
+ /^ac_cv_env_/b end
+ t clear
+ :clear
+ s/^\([^=]*\)=\(.*[{}].*\)$/test "${\1+set}" = set || &/
+ t end
+ s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
+ :end' >>confcache
+if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
+ if test -w "$cache_file"; then
+ if test "x$cache_file" != "x/dev/null"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
+$as_echo "$as_me: updating cache $cache_file" >&6;}
+ if test ! -f "$cache_file" || test -h "$cache_file"; then
+ cat confcache >"$cache_file"
+ else
+ case $cache_file in #(
+ */* | ?:*)
+ mv -f confcache "$cache_file"$$ &&
+ mv -f "$cache_file"$$ "$cache_file" ;; #(
+ *)
+ mv -f confcache "$cache_file" ;;
+ esac
+ fi
+ fi
+ else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
+$as_echo "$as_me: not updating unwritable cache $cache_file" >&6;}
+ fi
+fi
+rm -f confcache
+
+test "x$prefix" = xNONE && prefix=$ac_default_prefix
+# Let make expand exec_prefix.
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+
+DEFS=-DHAVE_CONFIG_H
+
+ac_libobjs=
+ac_ltlibobjs=
+U=
+for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
+ # 1. Remove the extension, and $U if already installed.
+ ac_script='s/\$U\././;s/\.o$//;s/\.obj$//'
+ ac_i=`$as_echo "$ac_i" | sed "$ac_script"`
+ # 2. Prepend LIBOBJDIR. When used with automake>=1.10 LIBOBJDIR
+ # will be set to the directory where LIBOBJS objects are built.
+ as_fn_append ac_libobjs " \${LIBOBJDIR}$ac_i\$U.$ac_objext"
+ as_fn_append ac_ltlibobjs " \${LIBOBJDIR}$ac_i"'$U.lo'
+done
+LIBOBJS=$ac_libobjs
+
+LTLIBOBJS=$ac_ltlibobjs
+
+
+
+: "${CONFIG_STATUS=./config.status}"
+ac_write_fail=0
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files $CONFIG_STATUS"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
+$as_echo "$as_me: creating $CONFIG_STATUS" >&6;}
+as_write_fail=0
+cat >$CONFIG_STATUS <<_ASEOF || as_write_fail=1
+#! $SHELL
+# Generated by $as_me.
+# Run this file to recreate the current configuration.
+# Compiler output produced by configure, useful for debugging
+# configure, is in config.log if it exists.
+
+debug=false
+ac_cs_recheck=false
+ac_cs_silent=false
+
+SHELL=\${CONFIG_SHELL-$SHELL}
+export SHELL
+_ASEOF
+cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
+
+# Be more Bourne compatible
+DUALCASE=1; export DUALCASE # for MKS sh
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
+ emulate sh
+ NULLCMD=:
+ # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+ # is contrary to our usage. Disable this feature.
+ alias -g '${1+"$@"}'='"$@"'
+ setopt NO_GLOB_SUBST
+else
+ case `(set -o) 2>/dev/null` in #(
+ *posix*) :
+ set -o posix ;; #(
+ *) :
+ ;;
+esac
+fi
+
+
+as_nl='
+'
+export as_nl
+# Printing a long string crashes Solaris 7 /usr/bin/printf.
+as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
+# Prefer a ksh shell builtin over an external printf program on Solaris,
+# but without wasting forks for bash or zsh.
+if test -z "$BASH_VERSION$ZSH_VERSION" \
+ && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
+ as_echo='print -r --'
+ as_echo_n='print -rn --'
+elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
+ as_echo='printf %s\n'
+ as_echo_n='printf %s'
+else
+ if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then
+ as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"'
+ as_echo_n='/usr/ucb/echo -n'
+ else
+ as_echo_body='eval expr "X$1" : "X\\(.*\\)"'
+ as_echo_n_body='eval
+ arg=$1;
+ case $arg in #(
+ *"$as_nl"*)
+ expr "X$arg" : "X\\(.*\\)$as_nl";
+ arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
+ esac;
+ expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl"
+ '
+ export as_echo_n_body
+ as_echo_n='sh -c $as_echo_n_body as_echo'
+ fi
+ export as_echo_body
+ as_echo='sh -c $as_echo_body as_echo'
+fi
+
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+ PATH_SEPARATOR=:
+ (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+ (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+ PATH_SEPARATOR=';'
+ }
+fi
+
+
+# IFS
+# We need space, tab and new line, in precisely that order. Quoting is
+# there to prevent editors from complaining about space-tab.
+# (If _AS_PATH_WALK were called with IFS unset, it would disable word
+# splitting by setting IFS to empty value.)
+IFS=" "" $as_nl"
+
+# Find who we are. Look in the path if we contain no directory separator.
+as_myself=
+case $0 in #((
+ *[\\/]* ) as_myself=$0 ;;
+ *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+ done
+IFS=$as_save_IFS
+
+ ;;
+esac
+# We did not find ourselves, most probably we were run as `sh COMMAND'
+# in which case we are not to be found in the path.
+if test "x$as_myself" = x; then
+ as_myself=$0
+fi
+if test ! -f "$as_myself"; then
+ $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+ exit 1
+fi
+
+# Unset variables that we do not need and which cause bugs (e.g. in
+# pre-3.0 UWIN ksh). But do not cause bugs in bash 2.01; the "|| exit 1"
+# suppresses any "Segmentation fault" message there. '((' could
+# trigger a bug in pdksh 5.2.14.
+for as_var in BASH_ENV ENV MAIL MAILPATH
+do eval test x\${$as_var+set} = xset \
+ && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# NLS nuisances.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# CDPATH.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+ as_status=$1; test $as_status -eq 0 && as_status=1
+ if test "$4"; then
+ as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+ fi
+ $as_echo "$as_me: error: $2" >&2
+ as_fn_exit $as_status
+} # as_fn_error
+
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+ return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+ set +e
+ as_fn_set_status $1
+ exit $1
+} # as_fn_exit
+
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+ { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then :
+ eval 'as_fn_append ()
+ {
+ eval $1+=\$2
+ }'
+else
+ as_fn_append ()
+ {
+ eval $1=\$$1\$2
+ }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
+ eval 'as_fn_arith ()
+ {
+ as_val=$(( $* ))
+ }'
+else
+ as_fn_arith ()
+ {
+ as_val=`expr "$@" || test $? -eq 1`
+ }
+fi # as_fn_arith
+
+
+if expr a : '\(a\)' >/dev/null 2>&1 &&
+ test "X`expr 00001 : '.*\(...\)'`" = X001; then
+ as_expr=expr
+else
+ as_expr=false
+fi
+
+if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
+ as_basename=basename
+else
+ as_basename=false
+fi
+
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+ as_dirname=dirname
+else
+ as_dirname=false
+fi
+
+as_me=`$as_basename -- "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+ X"$0" : 'X\(//\)$' \| \
+ X"$0" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X/"$0" |
+ sed '/^.*\/\([^/][^/]*\)\/*$/{
+ s//\1/
+ q
+ }
+ /^X\/\(\/\/\)$/{
+ s//\1/
+ q
+ }
+ /^X\/\(\/\).*/{
+ s//\1/
+ q
+ }
+ s/.*/./; q'`
+
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+ case `echo 'xy\c'` in
+ *c*) ECHO_T=' ';; # ECHO_T is single tab character.
+ xy) ECHO_C='\c';;
+ *) echo `echo ksh88 bug on AIX 6.1` > /dev/null
+ ECHO_T=' ';;
+ esac;;
+*)
+ ECHO_N='-n';;
+esac
+
+rm -f conf$$ conf$$.exe conf$$.file
+if test -d conf$$.dir; then
+ rm -f conf$$.dir/conf$$.file
+else
+ rm -f conf$$.dir
+ mkdir conf$$.dir 2>/dev/null
+fi
+if (echo >conf$$.file) 2>/dev/null; then
+ if ln -s conf$$.file conf$$ 2>/dev/null; then
+ as_ln_s='ln -s'
+ # ... but there are two gotchas:
+ # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+ # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+ # In both cases, we have to default to `cp -pR'.
+ ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
+ as_ln_s='cp -pR'
+ elif ln conf$$.file conf$$ 2>/dev/null; then
+ as_ln_s=ln
+ else
+ as_ln_s='cp -pR'
+ fi
+else
+ as_ln_s='cp -pR'
+fi
+rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
+rmdir conf$$.dir 2>/dev/null
+
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+ case $as_dir in #(
+ -*) as_dir=./$as_dir;;
+ esac
+ test -d "$as_dir" || eval $as_mkdir_p || {
+ as_dirs=
+ while :; do
+ case $as_dir in #(
+ *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+ *) as_qdir=$as_dir;;
+ esac
+ as_dirs="'$as_qdir' $as_dirs"
+ as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+ X"$as_dir" : 'X\(//\)[^/]' \| \
+ X"$as_dir" : 'X\(//\)$' \| \
+ X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$as_dir" |
+ sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+ s//\1/
+ q
+ }
+ /^X\(\/\/\)[^/].*/{
+ s//\1/
+ q
+ }
+ /^X\(\/\/\)$/{
+ s//\1/
+ q
+ }
+ /^X\(\/\).*/{
+ s//\1/
+ q
+ }
+ s/.*/./; q'`
+ test -d "$as_dir" && break
+ done
+ test -z "$as_dirs" || eval "mkdir $as_dirs"
+ } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+if mkdir -p . 2>/dev/null; then
+ as_mkdir_p='mkdir -p "$as_dir"'
+else
+ test -d ./-p && rmdir ./-p
+ as_mkdir_p=false
+fi
+
+
+# as_fn_executable_p FILE
+# -----------------------
+# Test if FILE is an executable regular file.
+as_fn_executable_p ()
+{
+ test -f "$1" && test -x "$1"
+} # as_fn_executable_p
+as_test_x='test -x'
+as_executable_p=as_fn_executable_p
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+exec 6>&1
+## ----------------------------------- ##
+## Main body of $CONFIG_STATUS script. ##
+## ----------------------------------- ##
+_ASEOF
+test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# Save the log message, to keep $0 and so on meaningful, and to
+# report actual input values of CONFIG_FILES etc. instead of their
+# values after options handling.
+ac_log="
+This file was extended by less $as_me 1, which was
+generated by GNU Autoconf 2.69. Invocation command line was
+
+ CONFIG_FILES = $CONFIG_FILES
+ CONFIG_HEADERS = $CONFIG_HEADERS
+ CONFIG_LINKS = $CONFIG_LINKS
+ CONFIG_COMMANDS = $CONFIG_COMMANDS
+ $ $0 $@
+
+on `(hostname || uname -n) 2>/dev/null | sed 1q`
+"
+
+_ACEOF
+
+case $ac_config_files in *"
+"*) set x $ac_config_files; shift; ac_config_files=$*;;
+esac
+
+case $ac_config_headers in *"
+"*) set x $ac_config_headers; shift; ac_config_headers=$*;;
+esac
+
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+# Files that config.status was made for.
+config_files="$ac_config_files"
+config_headers="$ac_config_headers"
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+ac_cs_usage="\
+\`$as_me' instantiates files and other configuration actions
+from templates according to the current configuration. Unless the files
+and actions are specified as TAGs, all are instantiated by default.
+
+Usage: $0 [OPTION]... [TAG]...
+
+ -h, --help print this help, then exit
+ -V, --version print version number and configuration settings, then exit
+ --config print configuration, then exit
+ -q, --quiet, --silent
+ do not print progress messages
+ -d, --debug don't remove temporary files
+ --recheck update $as_me by reconfiguring in the same conditions
+ --file=FILE[:TEMPLATE]
+ instantiate the configuration file FILE
+ --header=FILE[:TEMPLATE]
+ instantiate the configuration header FILE
+
+Configuration files:
+$config_files
+
+Configuration headers:
+$config_headers
+
+Report bugs to the package provider."
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
+ac_cs_version="\\
+less config.status 1
+configured by $0, generated by GNU Autoconf 2.69,
+ with options \\"\$ac_cs_config\\"
+
+Copyright (C) 2012 Free Software Foundation, Inc.
+This config.status script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it."
+
+ac_pwd='$ac_pwd'
+srcdir='$srcdir'
+INSTALL='$INSTALL'
+test -n "\$AWK" || AWK=awk
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# The default lists apply if the user does not specify any file.
+ac_need_defaults=:
+while test $# != 0
+do
+ case $1 in
+ --*=?*)
+ ac_option=`expr "X$1" : 'X\([^=]*\)='`
+ ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'`
+ ac_shift=:
+ ;;
+ --*=)
+ ac_option=`expr "X$1" : 'X\([^=]*\)='`
+ ac_optarg=
+ ac_shift=:
+ ;;
+ *)
+ ac_option=$1
+ ac_optarg=$2
+ ac_shift=shift
+ ;;
+ esac
+
+ case $ac_option in
+ # Handling of the options.
+ -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+ ac_cs_recheck=: ;;
+ --version | --versio | --versi | --vers | --ver | --ve | --v | -V )
+ $as_echo "$ac_cs_version"; exit ;;
+ --config | --confi | --conf | --con | --co | --c )
+ $as_echo "$ac_cs_config"; exit ;;
+ --debug | --debu | --deb | --de | --d | -d )
+ debug=: ;;
+ --file | --fil | --fi | --f )
+ $ac_shift
+ case $ac_optarg in
+ *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+ '') as_fn_error $? "missing file argument" ;;
+ esac
+ as_fn_append CONFIG_FILES " '$ac_optarg'"
+ ac_need_defaults=false;;
+ --header | --heade | --head | --hea )
+ $ac_shift
+ case $ac_optarg in
+ *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+ esac
+ as_fn_append CONFIG_HEADERS " '$ac_optarg'"
+ ac_need_defaults=false;;
+ --he | --h)
+ # Conflict between --help and --header
+ as_fn_error $? "ambiguous option: \`$1'
+Try \`$0 --help' for more information.";;
+ --help | --hel | -h )
+ $as_echo "$ac_cs_usage"; exit ;;
+ -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+ | -silent | --silent | --silen | --sile | --sil | --si | --s)
+ ac_cs_silent=: ;;
+
+ # This is an error.
+ -*) as_fn_error $? "unrecognized option: \`$1'
+Try \`$0 --help' for more information." ;;
+
+ *) as_fn_append ac_config_targets " $1"
+ ac_need_defaults=false ;;
+
+ esac
+ shift
+done
+
+ac_configure_extra_args=
+
+if $ac_cs_silent; then
+ exec 6>/dev/null
+ ac_configure_extra_args="$ac_configure_extra_args --silent"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+if \$ac_cs_recheck; then
+ set X $SHELL '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
+ shift
+ \$as_echo "running CONFIG_SHELL=$SHELL \$*" >&6
+ CONFIG_SHELL='$SHELL'
+ export CONFIG_SHELL
+ exec "\$@"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+exec 5>>config.log
+{
+ echo
+ sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX
+## Running $as_me. ##
+_ASBOX
+ $as_echo "$ac_log"
+} >&5
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+
+# Handling of arguments.
+for ac_config_target in $ac_config_targets
+do
+ case $ac_config_target in
+ "defines.h") CONFIG_HEADERS="$CONFIG_HEADERS defines.h" ;;
+ "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
+
+ *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
+ esac
+done
+
+
+# If the user did not use the arguments to specify the items to instantiate,
+# then the envvar interface is used. Set only those that are not.
+# We use the long form for the default assignment because of an extremely
+# bizarre bug on SunOS 4.1.3.
+if $ac_need_defaults; then
+ test "${CONFIG_FILES+set}" = set || CONFIG_FILES=$config_files
+ test "${CONFIG_HEADERS+set}" = set || CONFIG_HEADERS=$config_headers
+fi
+
+# Have a temporary directory for convenience. Make it in the build tree
+# simply because there is no reason against having it here, and in addition,
+# creating and moving files from /tmp can sometimes cause problems.
+# Hook for its removal unless debugging.
+# Note that there is a small window in which the directory will not be cleaned:
+# after its creation but before its name has been assigned to `$tmp'.
+$debug ||
+{
+ tmp= ac_tmp=
+ trap 'exit_status=$?
+ : "${ac_tmp:=$tmp}"
+ { test ! -d "$ac_tmp" || rm -fr "$ac_tmp"; } && exit $exit_status
+' 0
+ trap 'as_fn_exit 1' 1 2 13 15
+}
+# Create a (secure) tmp directory for tmp files.
+
+{
+ tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` &&
+ test -d "$tmp"
+} ||
+{
+ tmp=./conf$$-$RANDOM
+ (umask 077 && mkdir "$tmp")
+} || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
+ac_tmp=$tmp
+
+# Set up the scripts for CONFIG_FILES section.
+# No need to generate them if there are no CONFIG_FILES.
+# This happens for instance with `./config.status config.h'.
+if test -n "$CONFIG_FILES"; then
+
+
+ac_cr=`echo X | tr X '\015'`
+# On cygwin, bash can eat \r inside `` if the user requested igncr.
+# But we know of no other shell where ac_cr would be empty at this
+# point, so we can use a bashism as a fallback.
+if test "x$ac_cr" = x; then
+ eval ac_cr=\$\'\\r\'
+fi
+ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' </dev/null 2>/dev/null`
+if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then
+ ac_cs_awk_cr='\\r'
+else
+ ac_cs_awk_cr=$ac_cr
+fi
+
+echo 'BEGIN {' >"$ac_tmp/subs1.awk" &&
+_ACEOF
+
+
+{
+ echo "cat >conf$$subs.awk <<_ACEOF" &&
+ echo "$ac_subst_vars" | sed 's/.*/&!$&$ac_delim/' &&
+ echo "_ACEOF"
+} >conf$$subs.sh ||
+ as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+ac_delim_num=`echo "$ac_subst_vars" | grep -c '^'`
+ac_delim='%!_!# '
+for ac_last_try in false false false false false :; do
+ . ./conf$$subs.sh ||
+ as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+
+ ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X`
+ if test $ac_delim_n = $ac_delim_num; then
+ break
+ elif $ac_last_try; then
+ as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+ else
+ ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+ fi
+done
+rm -f conf$$subs.sh
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"\$ac_tmp/subs1.awk" <<\\_ACAWK &&
+_ACEOF
+sed -n '
+h
+s/^/S["/; s/!.*/"]=/
+p
+g
+s/^[^!]*!//
+:repl
+t repl
+s/'"$ac_delim"'$//
+t delim
+:nl
+h
+s/\(.\{148\}\)..*/\1/
+t more1
+s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/
+p
+n
+b repl
+:more1
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t nl
+:delim
+h
+s/\(.\{148\}\)..*/\1/
+t more2
+s/["\\]/\\&/g; s/^/"/; s/$/"/
+p
+b
+:more2
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t delim
+' <conf$$subs.awk | sed '
+/^[^""]/{
+ N
+ s/\n//
+}
+' >>$CONFIG_STATUS || ac_write_fail=1
+rm -f conf$$subs.awk
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+_ACAWK
+cat >>"\$ac_tmp/subs1.awk" <<_ACAWK &&
+ for (key in S) S_is_set[key] = 1
+ FS = "\a"
+
+}
+{
+ line = $ 0
+ nfields = split(line, field, "@")
+ substed = 0
+ len = length(field[1])
+ for (i = 2; i < nfields; i++) {
+ key = field[i]
+ keylen = length(key)
+ if (S_is_set[key]) {
+ value = S[key]
+ line = substr(line, 1, len) "" value "" substr(line, len + keylen + 3)
+ len += length(value) + length(field[++i])
+ substed = 1
+ } else
+ len += 1 + keylen
+ }
+
+ print line
+}
+
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
+ sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
+else
+ cat
+fi < "$ac_tmp/subs1.awk" > "$ac_tmp/subs.awk" \
+ || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
+_ACEOF
+
+# VPATH may cause trouble with some makes, so we remove sole $(srcdir),
+# ${srcdir} and @srcdir@ entries from VPATH if srcdir is ".", strip leading and
+# trailing colons and then remove the whole line if VPATH becomes empty
+# (actually we leave an empty line to preserve line numbers).
+if test "x$srcdir" = x.; then
+ ac_vpsub='/^[ ]*VPATH[ ]*=[ ]*/{
+h
+s///
+s/^/:/
+s/[ ]*$/:/
+s/:\$(srcdir):/:/g
+s/:\${srcdir}:/:/g
+s/:@srcdir@:/:/g
+s/^:*//
+s/:*$//
+x
+s/\(=[ ]*\).*/\1/
+G
+s/\n//
+s/^[^=]*=[ ]*$//
+}'
+fi
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+fi # test -n "$CONFIG_FILES"
+
+# Set up the scripts for CONFIG_HEADERS section.
+# No need to generate them if there are no CONFIG_HEADERS.
+# This happens for instance with `./config.status Makefile'.
+if test -n "$CONFIG_HEADERS"; then
+cat >"$ac_tmp/defines.awk" <<\_ACAWK ||
+BEGIN {
+_ACEOF
+
+# Transform confdefs.h into an awk script `defines.awk', embedded as
+# here-document in config.status, that substitutes the proper values into
+# config.h.in to produce config.h.
+
+# Create a delimiter string that does not exist in confdefs.h, to ease
+# handling of long lines.
+ac_delim='%!_!# '
+for ac_last_try in false false :; do
+ ac_tt=`sed -n "/$ac_delim/p" confdefs.h`
+ if test -z "$ac_tt"; then
+ break
+ elif $ac_last_try; then
+ as_fn_error $? "could not make $CONFIG_HEADERS" "$LINENO" 5
+ else
+ ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+ fi
+done
+
+# For the awk script, D is an array of macro values keyed by name,
+# likewise P contains macro parameters if any. Preserve backslash
+# newline sequences.
+
+ac_word_re=[_$as_cr_Letters][_$as_cr_alnum]*
+sed -n '
+s/.\{148\}/&'"$ac_delim"'/g
+t rset
+:rset
+s/^[ ]*#[ ]*define[ ][ ]*/ /
+t def
+d
+:def
+s/\\$//
+t bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[ ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3"/p
+s/^ \('"$ac_word_re"'\)[ ]*\(.*\)/D["\1"]=" \2"/p
+d
+:bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[ ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3\\\\\\n"\\/p
+t cont
+s/^ \('"$ac_word_re"'\)[ ]*\(.*\)/D["\1"]=" \2\\\\\\n"\\/p
+t cont
+d
+:cont
+n
+s/.\{148\}/&'"$ac_delim"'/g
+t clear
+:clear
+s/\\$//
+t bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/"/p
+d
+:bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/\\\\\\n"\\/p
+b cont
+' <confdefs.h | sed '
+s/'"$ac_delim"'/"\\\
+"/g' >>$CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ for (key in D) D_is_set[key] = 1
+ FS = "\a"
+}
+/^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\$)/ {
+ line = \$ 0
+ split(line, arg, " ")
+ if (arg[1] == "#") {
+ defundef = arg[2]
+ mac1 = arg[3]
+ } else {
+ defundef = substr(arg[1], 2)
+ mac1 = arg[2]
+ }
+ split(mac1, mac2, "(") #)
+ macro = mac2[1]
+ prefix = substr(line, 1, index(line, defundef) - 1)
+ if (D_is_set[macro]) {
+ # Preserve the white space surrounding the "#".
+ print prefix "define", macro P[macro] D[macro]
+ next
+ } else {
+ # Replace #undef with comments. This is necessary, for example,
+ # in the case of _POSIX_SOURCE, which is predefined and required
+ # on some systems where configure will not decide to define it.
+ if (defundef == "undef") {
+ print "/*", prefix defundef, macro, "*/"
+ next
+ }
+ }
+}
+{ print }
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+ as_fn_error $? "could not setup config headers machinery" "$LINENO" 5
+fi # test -n "$CONFIG_HEADERS"
+
+
+eval set X " :F $CONFIG_FILES :H $CONFIG_HEADERS "
+shift
+for ac_tag
+do
+ case $ac_tag in
+ :[FHLC]) ac_mode=$ac_tag; continue;;
+ esac
+ case $ac_mode$ac_tag in
+ :[FHL]*:*);;
+ :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5;;
+ :[FH]-) ac_tag=-:-;;
+ :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
+ esac
+ ac_save_IFS=$IFS
+ IFS=:
+ set x $ac_tag
+ IFS=$ac_save_IFS
+ shift
+ ac_file=$1
+ shift
+
+ case $ac_mode in
+ :L) ac_source=$1;;
+ :[FH])
+ ac_file_inputs=
+ for ac_f
+ do
+ case $ac_f in
+ -) ac_f="$ac_tmp/stdin";;
+ *) # Look for the file first in the build tree, then in the source tree
+ # (if the path is not absolute). The absolute path cannot be DOS-style,
+ # because $ac_f cannot contain `:'.
+ test -f "$ac_f" ||
+ case $ac_f in
+ [\\/$]*) false;;
+ *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
+ esac ||
+ as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5;;
+ esac
+ case $ac_f in *\'*) ac_f=`$as_echo "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
+ as_fn_append ac_file_inputs " '$ac_f'"
+ done
+
+ # Let's still pretend it is `configure' which instantiates (i.e., don't
+ # use $as_me), people would be surprised to read:
+ # /* config.h. Generated by config.status. */
+ configure_input='Generated from '`
+ $as_echo "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
+ `' by configure.'
+ if test x"$ac_file" != x-; then
+ configure_input="$ac_file. $configure_input"
+ { $as_echo "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
+$as_echo "$as_me: creating $ac_file" >&6;}
+ fi
+ # Neutralize special characters interpreted by sed in replacement strings.
+ case $configure_input in #(
+ *\&* | *\|* | *\\* )
+ ac_sed_conf_input=`$as_echo "$configure_input" |
+ sed 's/[\\\\&|]/\\\\&/g'`;; #(
+ *) ac_sed_conf_input=$configure_input;;
+ esac
+
+ case $ac_tag in
+ *:-:* | *:-) cat >"$ac_tmp/stdin" \
+ || as_fn_error $? "could not create $ac_file" "$LINENO" 5 ;;
+ esac
+ ;;
+ esac
+
+ ac_dir=`$as_dirname -- "$ac_file" ||
+$as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+ X"$ac_file" : 'X\(//\)[^/]' \| \
+ X"$ac_file" : 'X\(//\)$' \| \
+ X"$ac_file" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$ac_file" |
+ sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+ s//\1/
+ q
+ }
+ /^X\(\/\/\)[^/].*/{
+ s//\1/
+ q
+ }
+ /^X\(\/\/\)$/{
+ s//\1/
+ q
+ }
+ /^X\(\/\).*/{
+ s//\1/
+ q
+ }
+ s/.*/./; q'`
+ as_dir="$ac_dir"; as_fn_mkdir_p
+ ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+ ac_dir_suffix=/`$as_echo "$ac_dir" | sed 's|^\.[\\/]||'`
+ # A ".." for each directory in $ac_dir_suffix.
+ ac_top_builddir_sub=`$as_echo "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+ case $ac_top_builddir_sub in
+ "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
+ *) ac_top_build_prefix=$ac_top_builddir_sub/ ;;
+ esac ;;
+esac
+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
+ .) # We are building in place.
+ ac_srcdir=.
+ ac_top_srcdir=$ac_top_builddir_sub
+ ac_abs_top_srcdir=$ac_pwd ;;
+ [\\/]* | ?:[\\/]* ) # Absolute name.
+ ac_srcdir=$srcdir$ac_dir_suffix;
+ ac_top_srcdir=$srcdir
+ ac_abs_top_srcdir=$srcdir ;;
+ *) # Relative name.
+ ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+ ac_top_srcdir=$ac_top_build_prefix$srcdir
+ ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+
+ case $ac_mode in
+ :F)
+ #
+ # CONFIG_FILE
+ #
+
+ case $INSTALL in
+ [\\/$]* | ?:[\\/]* ) ac_INSTALL=$INSTALL ;;
+ *) ac_INSTALL=$ac_top_build_prefix$INSTALL ;;
+ esac
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# If the template does not know about datarootdir, expand it.
+# FIXME: This hack should be removed a few years after 2.60.
+ac_datarootdir_hack=; ac_datarootdir_seen=
+ac_sed_dataroot='
+/datarootdir/ {
+ p
+ q
+}
+/@datadir@/p
+/@docdir@/p
+/@infodir@/p
+/@localedir@/p
+/@mandir@/p'
+case `eval "sed -n \"\$ac_sed_dataroot\" $ac_file_inputs"` in
+*datarootdir*) ac_datarootdir_seen=yes;;
+*@datadir@*|*@docdir@*|*@infodir@*|*@localedir@*|*@mandir@*)
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
+$as_echo "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ ac_datarootdir_hack='
+ s&@datadir@&$datadir&g
+ s&@docdir@&$docdir&g
+ s&@infodir@&$infodir&g
+ s&@localedir@&$localedir&g
+ s&@mandir@&$mandir&g
+ s&\\\${datarootdir}&$datarootdir&g' ;;
+esac
+_ACEOF
+
+# Neutralize VPATH when `$srcdir' = `.'.
+# Shell code in configure.ac might set extrasub.
+# FIXME: do we really want to maintain this feature?
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_sed_extra="$ac_vpsub
+$extrasub
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+:t
+/@[a-zA-Z_][a-zA-Z_0-9]*@/!b
+s|@configure_input@|$ac_sed_conf_input|;t t
+s&@top_builddir@&$ac_top_builddir_sub&;t t
+s&@top_build_prefix@&$ac_top_build_prefix&;t t
+s&@srcdir@&$ac_srcdir&;t t
+s&@abs_srcdir@&$ac_abs_srcdir&;t t
+s&@top_srcdir@&$ac_top_srcdir&;t t
+s&@abs_top_srcdir@&$ac_abs_top_srcdir&;t t
+s&@builddir@&$ac_builddir&;t t
+s&@abs_builddir@&$ac_abs_builddir&;t t
+s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
+s&@INSTALL@&$ac_INSTALL&;t t
+$ac_datarootdir_hack
+"
+eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$ac_tmp/subs.awk" \
+ >$ac_tmp/out || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+
+test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
+ { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
+ { ac_out=`sed -n '/^[ ]*datarootdir[ ]*:*=/p' \
+ "$ac_tmp/out"`; test -z "$ac_out"; } &&
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined. Please make sure it is defined" >&5
+$as_echo "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined. Please make sure it is defined" >&2;}
+
+ rm -f "$ac_tmp/stdin"
+ case $ac_file in
+ -) cat "$ac_tmp/out" && rm -f "$ac_tmp/out";;
+ *) rm -f "$ac_file" && mv "$ac_tmp/out" "$ac_file";;
+ esac \
+ || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+ ;;
+ :H)
+ #
+ # CONFIG_HEADER
+ #
+ if test x"$ac_file" != x-; then
+ {
+ $as_echo "/* $configure_input */" \
+ && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs"
+ } >"$ac_tmp/config.h" \
+ || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+ if diff "$ac_file" "$ac_tmp/config.h" >/dev/null 2>&1; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
+$as_echo "$as_me: $ac_file is unchanged" >&6;}
+ else
+ rm -f "$ac_file"
+ mv "$ac_tmp/config.h" "$ac_file" \
+ || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+ fi
+ else
+ $as_echo "/* $configure_input */" \
+ && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs" \
+ || as_fn_error $? "could not create -" "$LINENO" 5
+ fi
+ ;;
+
+
+ esac
+
+done # for ac_tag
+
+
+as_fn_exit 0
+_ACEOF
+ac_clean_files=$ac_clean_files_save
+
+test $ac_write_fail = 0 ||
+ as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5
+
+
+# configure is writing to config.log, and then calls config.status.
+# config.status does its own redirection, appending to config.log.
+# Unfortunately, on DOS this fails, as config.log is still kept open
+# by configure, so config.status won't be able to write to it; its
+# output is simply discarded. So we exec the FD to /dev/null,
+# effectively closing config.log, so it can be properly (re)opened and
+# appended to by config.status. When coming back to configure, we
+# need to make the FD available again.
+if test "$no_create" != yes; then
+ ac_cs_success=:
+ ac_config_status_args=
+ test "$silent" = yes &&
+ ac_config_status_args="$ac_config_status_args --quiet"
+ exec 5>/dev/null
+ $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false
+ exec 5>>config.log
+ # Use ||, not &&, to avoid exiting from the if with $? = 1, which
+ # would make configure fail if this is the last instruction.
+ $ac_cs_success || as_fn_exit 1
+fi
+if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
+$as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
+fi
+
--- /dev/null
+# Process this file with autoconf to produce a configure script.
+
+# Copyright (C) 1984-2011 Mark Nudelman
+#
+# You may distribute under the terms of either the GNU General Public
+# License or the Less License, as specified in the README file.
+#
+# For more information about less, or for information on how to
+# contact the author, see the README file.
+
+# Autoconf initialization.
+AC_INIT(less, 1)
+AC_CONFIG_SRCDIR([forwback.c])
+AC_CONFIG_HEADER([defines.h])
+
+# Checks for programs.
+AC_PROG_CC
+AC_ISC_POSIX
+AC_PROG_GCC_TRADITIONAL
+AC_PROG_INSTALL
+
+# Checks for compilation model.
+AC_SYS_LARGEFILE
+
+# Checks for general libraries.
+AC_CHECK_LIB(tinfo, tgoto, [have_tinfo=yes], [have_tinfo=no])
+AC_CHECK_LIB(xcurses, initscr, [have_xcurses=yes], [have_xcurses=no])
+AC_CHECK_LIB(ncursesw, initscr, [have_ncursesw=yes], [have_ncursesw=no])
+AC_CHECK_LIB(ncurses, initscr, [have_ncurses=yes], [have_ncurses=no])
+AC_CHECK_LIB(curses, initscr, [have_curses=yes], [have_curses=no])
+AC_CHECK_LIB(termcap, tgetent, [have_termcap=yes], [have_termcap=no])
+AC_CHECK_LIB(termlib, tgetent, [have_termlib=yes], [have_termlib=no])
+# Regular expressions (regcmp) are in -lgen on Solaris 2, (but in libc
+# at least on Solaris 10 (2.10)) and in -lintl on SCO Unix.
+AC_SEARCH_LIBS([regcmp], [gen intl PW])
+
+# Checks for terminal libraries
+AC_MSG_CHECKING([for working terminal libraries])
+TERMLIBS=
+
+# Check for systems where curses is broken.
+curses_broken=0
+if test x`uname -s` = "xHP-UX" >/dev/null 2>&1; then
+if test x`uname -r` = "xB.11.00" >/dev/null 2>&1; then
+ curses_broken=1
+fi
+if test x`uname -r` = "xB.11.11" >/dev/null 2>&1; then
+ curses_broken=1
+fi
+fi
+
+if test $curses_broken = 0; then
+
+# -- Try tinfo.
+if test "x$TERMLIBS" = x; then
+ if test $have_tinfo = yes; then
+ TERMLIBS="-ltinfo"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ AC_TRY_LINK(, [tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);],
+ [termok=yes], [termok=no])
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try xcurses.
+if test "x$TERMLIBS" = x; then
+ if test $have_xcurses = yes; then
+ TERMLIBS="-lxcurses"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ AC_TRY_LINK(, [tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);],
+ [termok=yes], [termok=no])
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try ncursesw.
+if test "x$TERMLIBS" = x; then
+ if test $have_ncursesw = yes; then
+ TERMLIBS="-lncursesw"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ AC_TRY_LINK(, [tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);],
+ [termok=yes], [termok=no])
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try ncurses.
+if test "x$TERMLIBS" = x; then
+ if test $have_ncurses = yes; then
+ TERMLIBS="-lncurses"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ AC_TRY_LINK(, [tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);],
+ [termok=yes], [termok=no])
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try curses.
+if test "x$TERMLIBS" = x; then
+ if test $have_curses = yes; then
+ TERMLIBS="-lcurses"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ AC_TRY_LINK(, [tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);],
+ [termok=yes], [termok=no])
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try curses & termcap.
+if test "x$TERMLIBS" = x; then
+ if test $have_curses = yes; then
+ if test $have_termcap = yes; then
+ TERMLIBS="-lcurses -ltermcap"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ AC_TRY_LINK(, [tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);],
+ [termok=yes], [termok=no])
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+ fi
+fi
+fi
+
+# -- Try termcap.
+if test "x$TERMLIBS" = x; then
+ if test $have_termcap = yes; then
+ TERMLIBS="-ltermcap"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ AC_TRY_LINK(, [tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);],
+ [termok=yes], [termok=no])
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+# -- Try termlib.
+if test "x$TERMLIBS" = x; then
+ if test $have_termlib = yes; then
+ TERMLIBS="-lcurses -ltermlib"
+ SAVE_LIBS=$LIBS
+ LIBS="$LIBS $TERMLIBS"
+ AC_TRY_LINK(, [tgetent(0,0); tgetflag(0); tgetnum(0); tgetstr(0,0);],
+ [termok=yes], [termok=no])
+ LIBS=$SAVE_LIBS
+ if test $termok = no; then TERMLIBS=""; fi
+ fi
+fi
+
+if test "x$TERMLIBS" = x; then
+ AC_MSG_RESULT(Cannot find terminal libraries - configure failed)
+ exit 1
+fi
+AC_MSG_RESULT(using $TERMLIBS)
+LIBS="$LIBS $TERMLIBS"
+
+# Checks for header files.
+AC_HEADER_STDC
+AC_CHECK_HEADERS([ctype.h errno.h fcntl.h limits.h stdio.h stdlib.h string.h termcap.h termio.h termios.h time.h unistd.h values.h sys/ioctl.h sys/stream.h wctype.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_HEADER_STAT
+AC_C_CONST
+AC_TYPE_OFF_T
+AC_TYPE_SIZE_T
+AC_HEADER_TIME
+
+# Autoheader templates for symbols defined later by AC_DEFINE.
+AH_TEMPLATE([HAVE_GNU_REGEX],
+ [GNU regex library])
+AH_TEMPLATE([HAVE_POSIX_REGCOMP],
+ [POSIX regcomp() and regex.h])
+AH_TEMPLATE([HAVE_PCRE],
+ [PCRE (Perl-compatible regular expression) library])
+AH_TEMPLATE([HAVE_RE_COMP],
+ [BSD re_comp()])
+AH_TEMPLATE([HAVE_REGCMP],
+ [System V regcmp()])
+AH_TEMPLATE([HAVE_V8_REGCOMP],
+ [Henry Spencer V8 regcomp() and regexp.h])
+AH_TEMPLATE([NO_REGEX],
+ [pattern matching is supported, but without metacharacters.])
+AH_TEMPLATE([HAVE_REGEXEC2],
+ [])
+AH_TEMPLATE([HAVE_VOID],
+ [Define HAVE_VOID if your compiler supports the "void" type.])
+AH_TEMPLATE([HAVE_FLOAT],
+ [Define HAVE_FLOAT if your compiler supports the "double" type.])
+AH_TEMPLATE([HAVE_CONST],
+ [Define HAVE_CONST if your compiler supports the "const" modifier.])
+AH_TEMPLATE([HAVE_STAT_INO],
+ [Define HAVE_STAT_INO if your struct stat has st_ino and st_dev.])
+AH_TEMPLATE([HAVE_TIME_T],
+ [Define HAVE_TIME_T if your system supports the "time_t" type.])
+AH_TEMPLATE([HAVE_STRERROR],
+ [Define HAVE_STRERROR if you have the strerror() function.])
+AH_TEMPLATE([HAVE_FILENO],
+ [Define HAVE_FILENO if you have the fileno() macro.])
+AH_TEMPLATE([HAVE_ERRNO],
+ [Define HAVE_ERRNO if you have the errno variable.])
+AH_TEMPLATE([MUST_DEFINE_ERRNO],
+ [Define MUST_DEFINE_ERRNO if you have errno but it is not define in errno.h.])
+AH_TEMPLATE([HAVE_SYS_ERRLIST],
+ [Define HAVE_SYS_ERRLIST if you have the sys_errlist[] variable.])
+AH_TEMPLATE([HAVE_OSPEED],
+ [Define HAVE_OSPEED if your termcap library has the ospeed variable.])
+AH_TEMPLATE([MUST_DEFINE_OSPEED],
+ [Define MUST_DEFINE_OSPEED if you have ospeed but it is not defined in termcap.h.])
+AH_TEMPLATE([HAVE_LOCALE],
+ [Define HAVE_LOCALE if you have locale.h and setlocale.])
+AH_TEMPLATE([HAVE_TERMIOS_FUNCS],
+ [Define HAVE_TERMIOS_FUNCS if you have tcgetattr/tcsetattr.])
+AH_TEMPLATE([HAVE_UPPER_LOWER],
+ [Define HAVE_UPPER_LOWER if you have isupper, islower, toupper, tolower.])
+AH_TEMPLATE([HAVE_WCTYPE],
+ [Define HAVE_WCTYPE if you have iswupper, iswlower, towupper, towlower.])
+AH_TEMPLATE([HAVE_SIGSET_T],
+ [Define HAVE_SIGSET_T you have the sigset_t type.])
+AH_TEMPLATE([HAVE_SIGEMPTYSET],
+ [Define HAVE_SIGEMPTYSET if you have the sigemptyset macro.])
+AH_TEMPLATE([EDIT_PGM],
+ [Define EDIT_PGM to your editor.])
+AH_TEMPLATE([SECURE_COMPILE],
+ [Define SECURE_COMPILE=1 to build a secure version of less.])
+
+# Checks for identifiers.
+AC_TYPE_OFF_T
+AC_MSG_CHECKING(for void)
+AC_TRY_COMPILE(, [void *foo = 0;],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_VOID)], [AC_MSG_RESULT(no)])
+AC_MSG_CHECKING(for const)
+AC_TRY_COMPILE(, [const int foo = 0;],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_CONST)], [AC_MSG_RESULT(no)])
+AC_MSG_CHECKING(for time_t)
+AC_TRY_COMPILE([#include <time.h>], [time_t t = 0;],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_TIME_T)], [AC_MSG_RESULT(no)])
+AC_MSG_CHECKING(for st_ino in struct stat)
+AC_TRY_COMPILE([#include <sys/types.h>
+#include <sys/stat.h>],
+ [struct stat s; dev_t dev = s.st_dev; ino_t ino = s.st_ino;],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_STAT_INO)], [AC_MSG_RESULT(no)])
+
+# Checks for library functions.
+AC_TYPE_SIGNAL
+AC_CHECK_FUNCS([fsync popen _setjmp sigprocmask sigsetmask snprintf stat system fchmod])
+
+# AC_CHECK_FUNCS may not work for inline functions, so test these separately.
+AC_MSG_CHECKING(for memcpy)
+AC_TRY_LINK([
+#if HAVE_STRING_H
+#include <string.h>
+#endif], [memcpy(0,0,0);],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_MEMCPY)], [AC_MSG_RESULT(no)])
+
+AC_MSG_CHECKING(for strchr)
+AC_TRY_LINK([
+#if HAVE_STRING_H
+#include <string.h>
+#endif], [strchr("x",'x');],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_STRCHR)], [AC_MSG_RESULT(no)])
+
+AC_MSG_CHECKING(for strstr)
+AC_TRY_LINK([
+#if HAVE_STRING_H
+#include <string.h>
+#endif], [strstr("x","x");],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_STRSTR)], [AC_MSG_RESULT(no)])
+
+# Some systems have termios.h but not the corresponding functions.
+AC_CHECK_FUNC(tcgetattr, AC_DEFINE(HAVE_TERMIOS_FUNCS))
+
+AC_MSG_CHECKING(for fileno)
+AC_TRY_LINK([
+#if HAVE_STDIO_H
+#include <stdio.h>
+#endif], [static int x; x = fileno(stdin);],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_FILENO)], [AC_MSG_RESULT(no)])
+
+AC_MSG_CHECKING(for strerror)
+AC_TRY_LINK([
+#if HAVE_STDIO_H
+#include <stdio.h>
+#endif
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif], [static char *x; x = strerror(0);],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_STRERROR)], [AC_MSG_RESULT(no)])
+
+AC_MSG_CHECKING(for sys_errlist)
+AC_TRY_LINK(, [extern char *sys_errlist[]; static char **x; x = sys_errlist;],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_SYS_ERRLIST)], [AC_MSG_RESULT(no)])
+
+AC_CHECK_TYPES([sigset_t],,,[#include <signal.h>])
+
+AC_MSG_CHECKING(for sigemptyset)
+AC_TRY_LINK([
+#include <signal.h>
+], [sigset_t s; sigemptyset(&s);],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_SIGEMPTYSET)], [AC_MSG_RESULT(no)])
+
+have_errno=no
+AC_MSG_CHECKING(for errno)
+AC_TRY_LINK([
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif], [static int x; x = errno;],
+ [AC_MSG_RESULT(yes - in errno.h); AC_DEFINE(HAVE_ERRNO) have_errno=yes])
+if test $have_errno = no; then
+AC_TRY_LINK([
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif], [extern int errno; static int x; x = errno;],
+ [AC_MSG_RESULT(yes - must define); AC_DEFINE(HAVE_ERRNO) AC_DEFINE(MUST_DEFINE_ERRNO)],
+ [AC_MSG_RESULT(no)])
+fi
+
+AC_MSG_CHECKING(for locale)
+AC_TRY_LINK([#include <locale.h>
+#include <ctype.h>
+#include <langinfo.h>], [setlocale(LC_CTYPE,""); isprint(0); iscntrl(0);],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_LOCALE)], [AC_MSG_RESULT(no)])
+
+AC_MSG_CHECKING(for ctype functions)
+AC_TRY_LINK([
+#if HAVE_CTYPE_H
+#include <ctype.h>
+#endif], [static int x; x = isupper(x); x = tolower(x); x = toupper(x);],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_UPPER_LOWER)], [AC_MSG_RESULT(no)])
+
+AC_MSG_CHECKING(for wctype functions)
+AC_TRY_LINK([#include <wctype.h>], [iswlower(0); iswupper(0); towlower(0); towupper(0);],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_WCTYPE)], [AC_MSG_RESULT(no)])
+
+# Checks for external variable ospeed in the termcap library.
+have_ospeed=no
+AC_MSG_CHECKING(termcap for ospeed)
+AC_TRY_LINK([
+#include <sys/types.h>
+#if HAVE_TERMIOS_H
+#include <termios.h>
+#endif
+#if HAVE_TERMCAP_H
+#include <termcap.h>
+#endif], [ospeed = 0;],
+[AC_MSG_RESULT(yes - in termcap.h); AC_DEFINE(HAVE_OSPEED) have_ospeed=yes])
+if test $have_ospeed = no; then
+AC_TRY_LINK(, [extern short ospeed; ospeed = 0;],
+ [AC_MSG_RESULT(yes - must define); AC_DEFINE(HAVE_OSPEED) AC_DEFINE(MUST_DEFINE_OSPEED)],
+ [AC_MSG_RESULT(no)])
+fi
+
+# Compile in secure mode?
+AC_ARG_WITH(secure,
+ [ --with-secure Compile in secure mode],
+ AC_DEFINE(SECURE_COMPILE, 1), AC_DEFINE(SECURE_COMPILE, 0))
+
+# Should we use floating point?
+AC_MSG_CHECKING(for floating point)
+AC_ARG_WITH(no-float,
+ [ --with-no-float Do not use floating point],
+ WANT_NO_FLOAT=1, WANT_NO_FLOAT=0)
+if test $WANT_NO_FLOAT = 0; then
+ AC_TRY_LINK(, [double f1 = 12.5; double f2 = f1*f1/2.5;],
+ [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_FLOAT)], [AC_MSG_RESULT(no)])
+else
+ AC_MSG_RESULT(disabled by user)
+fi
+
+# Checks for regular expression functions.
+have_regex=no
+have_posix_regex=unknown
+supported_regex=""
+
+# Select a regular expression library.
+WANT_REGEX=auto
+AC_ARG_WITH(regex,
+ [ --with-regex={auto,gnu,pcre,posix,regcmp,re_comp,regcomp,regcomp-local,none} Select a regular expression library [auto]],
+ WANT_REGEX="$withval")
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = posix; then
+# Some versions of Solaris have a regcomp() function, but it doesn't work!
+# So we run a test program. If we're cross-compiling, do it the old way.
+AC_MSG_CHECKING(for POSIX regcomp)
+AC_TRY_RUN([
+#include <sys/types.h>
+#include <regex.h>
+main() { regex_t r; regmatch_t rm; char *text = "xabcy";
+if (regcomp(&r, "abc", 0)) exit(1);
+if (regexec(&r, text, 1, &rm, 0)) exit(1);
+#ifndef __WATCOMC__
+if (rm.rm_so != 1) exit(1); /* check for correct offset */
+#else
+if (rm.rm_sp != text + 1) exit(1); /* check for correct offset */
+#endif
+exit(0); }],
+ have_posix_regex=yes, have_posix_regex=no, have_posix_regex=unknown)
+if test $have_posix_regex = yes; then
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_POSIX_REGCOMP) supported_regex="$supported_regex posix"
+ have_regex=yes
+elif test $have_posix_regex = unknown; then
+ AC_TRY_LINK([
+#include <sys/types.h>
+#include <regex.h>],
+ [regex_t *r; regfree(r);],
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_POSIX_REGCOMP) have_regex=yes; supported_regex="$supported_regex posix")
+else
+ AC_MSG_RESULT(no)
+fi
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = pcre; then
+AC_CHECK_LIB(pcre, pcre_compile,
+[AC_DEFINE(HAVE_PCRE) LIBS="$LIBS -lpcre" have_regex=yes; supported_regex="$supported_regex pcre"], [])
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = gnu; then
+AC_CHECK_LIB(c, re_compile_pattern,
+[AC_DEFINE(HAVE_GNU_REGEX) have_regex=yes; supported_regex="$supported_regex gnu"], [])
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = regcmp; then
+AC_CHECK_FUNC(regcmp,
+[AC_DEFINE(HAVE_REGCMP) have_regex=yes; supported_regex="$supported_regex regcmp"],[])
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = regcomp; then
+AC_MSG_CHECKING(for V8 regcomp)
+AC_TRY_LINK([
+#include "regexp.h"], [regcomp("");],
+[AC_MSG_RESULT(yes); AC_DEFINE(HAVE_V8_REGCOMP) have_regex=yes; supported_regex="$supported_regex regcomp"],[AC_MSG_RESULT(no)])
+fi
+fi
+
+if test $have_regex = no && test -f ${srcdir}/regexp.c; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = regcomp-local; then
+AC_MSG_RESULT(using V8 regcomp -- local source); AC_DEFINE(HAVE_V8_REGCOMP)
+supported_regex="$supported_regex regcomp-local"
+AC_DEFINE(HAVE_REGEXEC2) REGEX_O='regexp.$(O)' AC_SUBST(REGEX_O) have_regex=yes
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = re_comp; then
+AC_MSG_CHECKING(for re_comp)
+AC_CHECK_FUNC(re_comp,
+[AC_DEFINE(HAVE_RE_COMP) have_regex=yes; supported_regex="$supported_regex re_comp"],[])
+fi
+fi
+
+if test $have_regex = no; then
+if test $WANT_REGEX = auto -o $WANT_REGEX = none; then
+AC_MSG_RESULT(using no regex)
+else
+AC_MSG_WARN(cannot find regular expression library)
+fi
+AC_DEFINE(NO_REGEX) supported_regex="$supported_regex none"
+fi
+
+AC_MSG_RESULT(regular expression library: $supported_regex)
+
+AC_ARG_WITH(editor,
+ [ --with-editor=PROGRAM use PROGRAM as the default editor [vi]],
+ AC_DEFINE_UNQUOTED(EDIT_PGM, "$withval"), AC_DEFINE(EDIT_PGM, "vi"))
+
+AH_TOP([
+/* Unix definition file for less. -*- C -*-
+ *
+ * This file has 3 sections:
+ * User preferences.
+ * Settings always true on Unix.
+ * Settings automatically determined by configure.
+ *
+ * * * * * * WARNING * * * * * *
+ * If you edit defines.h by hand, do "touch stamp-h" before you run make
+ * so config.status doesn't overwrite your changes.
+ */
+
+/* User preferences. */
+
+/*
+ * SECURE is 1 if you wish to disable a bunch of features in order to
+ * be safe to run by unprivileged users.
+ * SECURE_COMPILE is set by the --with-secure configure option.
+ */
+#define SECURE SECURE_COMPILE
+
+/*
+ * SHELL_ESCAPE is 1 if you wish to allow shell escapes.
+ * (This is possible only if your system supplies the system() function.)
+ */
+#define SHELL_ESCAPE (!SECURE)
+
+/*
+ * EXAMINE is 1 if you wish to allow examining files by name from within less.
+ */
+#define EXAMINE (!SECURE)
+
+/*
+ * TAB_COMPLETE_FILENAME is 1 if you wish to allow the TAB key
+ * to complete filenames at prompts.
+ */
+#define TAB_COMPLETE_FILENAME (!SECURE)
+
+/*
+ * CMD_HISTORY is 1 if you wish to allow keys to cycle through
+ * previous commands at prompts.
+ */
+#define CMD_HISTORY 1
+
+/*
+ * HILITE_SEARCH is 1 if you wish to have search targets to be
+ * displayed in standout mode.
+ */
+#define HILITE_SEARCH 1
+
+/*
+ * EDITOR is 1 if you wish to allow editor invocation (the "v" command).
+ * (This is possible only if your system supplies the system() function.)
+ * EDIT_PGM is the name of the (default) editor to be invoked.
+ */
+#define EDITOR (!SECURE)
+
+/*
+ * TAGS is 1 if you wish to support tag files.
+ */
+#define TAGS (!SECURE)
+
+/*
+ * USERFILE is 1 if you wish to allow a .less file to specify
+ * user-defined key bindings.
+ */
+#define USERFILE (!SECURE)
+
+/*
+ * GLOB is 1 if you wish to have shell metacharacters expanded in filenames.
+ * This will generally work if your system provides the "popen" function
+ * and the "echo" shell command.
+ */
+#define GLOB (!SECURE)
+
+/*
+ * PIPEC is 1 if you wish to have the "|" command
+ * which allows the user to pipe data into a shell command.
+ */
+#define PIPEC (!SECURE)
+
+/*
+ * LOGFILE is 1 if you wish to allow the -l option (to create log files).
+ */
+#define LOGFILE (!SECURE)
+
+/*
+ * GNU_OPTIONS is 1 if you wish to support the GNU-style command
+ * line options --help and --version.
+ */
+#define GNU_OPTIONS 1
+
+/*
+ * ONLY_RETURN is 1 if you want RETURN to be the only input which
+ * will continue past an error message.
+ * Otherwise, any key will continue past an error message.
+ */
+#define ONLY_RETURN 0
+
+/*
+ * LESSKEYFILE is the filename of the default lesskey output file
+ * (in the HOME directory).
+ * LESSKEYFILE_SYS is the filename of the system-wide lesskey output file.
+ * DEF_LESSKEYINFILE is the filename of the default lesskey input
+ * (in the HOME directory).
+ * LESSHISTFILE is the filename of the history file
+ * (in the HOME directory).
+ */
+#define LESSKEYFILE ".less"
+#define LESSKEYFILE_SYS SYSDIR "/sysless"
+#define DEF_LESSKEYINFILE ".lesskey"
+#define LESSHISTFILE ".lesshst"
+
+
+/* Settings always true on Unix. */
+
+/*
+ * Define MSDOS_COMPILER if compiling under Microsoft C.
+ */
+#define MSDOS_COMPILER 0
+
+/*
+ * Pathname separator character.
+ */
+#define PATHNAME_SEP "/"
+
+/*
+ * The value returned from tgetent on success.
+ * Some HP-UX systems return 0 on success.
+ */
+#define TGETENT_OK 1
+
+/*
+ * HAVE_SYS_TYPES_H is 1 if your system has <sys/types.h>.
+ */
+#define HAVE_SYS_TYPES_H 1
+
+/*
+ * Define if you have the <sgstat.h> header file.
+ */
+#undef HAVE_SGSTAT_H
+
+/*
+ * HAVE_PERROR is 1 if your system has the perror() call.
+ * (Actually, if it has sys_errlist, sys_nerr and errno.)
+ */
+#define HAVE_PERROR 1
+
+/*
+ * HAVE_TIME is 1 if your system has the time() call.
+ */
+#define HAVE_TIME 1
+
+/*
+ * HAVE_SHELL is 1 if your system supports a SHELL command interpreter.
+ */
+#define HAVE_SHELL 1
+
+/*
+ * Default shell metacharacters and meta-escape character.
+ */
+#define DEF_METACHARS "; *?\t\n'\"()<>[]|&^`#\\$%=~"
+#define DEF_METAESCAPE "\\"
+
+/*
+ * HAVE_DUP is 1 if your system has the dup() call.
+ */
+#define HAVE_DUP 1
+
+/* Define to 1 if you have the memcpy() function. */
+#define HAVE_MEMCPY 1
+
+/* Define to 1 if you have the strchr() function. */
+#define HAVE_STRCHR 1
+
+/* Define to 1 if you have the strstr() function. */
+#define HAVE_STRSTR 1
+
+/*
+ * Sizes of various buffers.
+ */
+#if 0 /* old sizes for small memory machines */
+#define CMDBUF_SIZE 512 /* Buffer for multichar commands */
+#define UNGOT_SIZE 100 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 200 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 512 /* Max size of line in tags file */
+#define TABSTOP_MAX 32 /* Max number of custom tab stops */
+#else /* more reasonable sizes for modern machines */
+#define CMDBUF_SIZE 2048 /* Buffer for multichar commands */
+#define UNGOT_SIZE 200 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Initial max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 2048 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 1024 /* Max size of line in tags file */
+#define TABSTOP_MAX 128 /* Max number of custom tab stops */
+#endif
+
+/* Settings automatically determined by configure. */
+])
+
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+/*
+ * Routines to convert text in various ways. Used by search.
+ */
+
+#include "less.h"
+#include "charset.h"
+
+extern int utf_mode;
+
+/*
+ * Get the length of a buffer needed to convert a string.
+ */
+ public int
+cvt_length(len, ops)
+ int len;
+ int ops;
+{
+ if (utf_mode)
+ /*
+ * Just copying a string in UTF-8 mode can cause it to grow
+ * in length.
+ * Four output bytes for one input byte is the worst case.
+ */
+ len *= 4;
+ return (len + 1);
+}
+
+/*
+ * Allocate a chpos array for use by cvt_text.
+ */
+ public int *
+cvt_alloc_chpos(len)
+ int len;
+{
+ int i;
+ int *chpos = (int *) ecalloc(sizeof(int), len);
+ /* Initialize all entries to an invalid position. */
+ for (i = 0; i < len; i++)
+ chpos[i] = -1;
+ return (chpos);
+}
+
+/*
+ * Convert text. Perform the transformations specified by ops.
+ * Returns converted text in odst. The original offset of each
+ * odst character (when it was in osrc) is returned in the chpos array.
+ */
+ public void
+cvt_text(odst, osrc, chpos, lenp, ops)
+ char *odst;
+ char *osrc;
+ int *chpos;
+ int *lenp;
+ int ops;
+{
+ char *dst;
+ char *edst = odst;
+ char *src;
+ register char *src_end;
+ LWCHAR ch;
+
+ if (lenp != NULL)
+ src_end = osrc + *lenp;
+ else
+ src_end = osrc + strlen(osrc);
+
+ for (src = osrc, dst = odst; src < src_end; )
+ {
+ int src_pos = (int) (src - osrc);
+ int dst_pos = (int) (dst - odst);
+ ch = step_char(&src, +1, src_end);
+ if ((ops & CVT_BS) && ch == '\b' && dst > odst)
+ {
+ /* Delete backspace and preceding char. */
+ do {
+ dst--;
+ } while (dst > odst &&
+ !IS_ASCII_OCTET(*dst) && !IS_UTF8_LEAD(*dst));
+ } else if ((ops & CVT_ANSI) && IS_CSI_START(ch))
+ {
+ /* Skip to end of ANSI escape sequence. */
+ src++; /* skip the CSI start char */
+ while (src < src_end)
+ if (!is_ansi_middle(*src++))
+ break;
+ } else
+ {
+ /* Just copy the char to the destination buffer. */
+ if ((ops & CVT_TO_LC) && IS_UPPER(ch))
+ ch = TO_LOWER(ch);
+ put_wchar(&dst, ch);
+ /* Record the original position of the char. */
+ if (chpos != NULL)
+ chpos[dst_pos] = src_pos;
+ }
+ if (dst > edst)
+ edst = dst;
+ }
+ if ((ops & CVT_CRLF) && edst > odst && edst[-1] == '\r')
+ edst--;
+ *edst = '\0';
+ if (lenp != NULL)
+ *lenp = (int) (edst - odst);
+ /* FIXME: why was this here? if (chpos != NULL) chpos[dst - odst] = src - osrc; */
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines to decode user commands.
+ *
+ * This is all table driven.
+ * A command table is a sequence of command descriptors.
+ * Each command descriptor is a sequence of bytes with the following format:
+ * <c1><c2>...<cN><0><action>
+ * The characters c1,c2,...,cN are the command string; that is,
+ * the characters which the user must type.
+ * It is terminated by a null <0> byte.
+ * The byte after the null byte is the action code associated
+ * with the command string.
+ * If an action byte is OR-ed with A_EXTRA, this indicates
+ * that the option byte is followed by an extra string.
+ *
+ * There may be many command tables.
+ * The first (default) table is built-in.
+ * Other tables are read in from "lesskey" files.
+ * All the tables are linked together and are searched in order.
+ */
+
+#include "less.h"
+#include "cmd.h"
+#include "lesskey.h"
+
+extern int erase_char, erase2_char, kill_char;
+extern int secure;
+
+#define SK(k) \
+ SK_SPECIAL_KEY, (k), 6, 1, 1, 1
+/*
+ * Command table is ordered roughly according to expected
+ * frequency of use, so the common commands are near the beginning.
+ */
+
+static unsigned char cmdtable[] =
+{
+ '\r',0, A_F_LINE,
+ '\n',0, A_F_LINE,
+ 'e',0, A_F_LINE,
+ 'j',0, A_F_LINE,
+ SK(SK_DOWN_ARROW),0, A_F_LINE,
+ CONTROL('E'),0, A_F_LINE,
+ CONTROL('N'),0, A_F_LINE,
+ 'k',0, A_B_LINE,
+ 'y',0, A_B_LINE,
+ CONTROL('Y'),0, A_B_LINE,
+ SK(SK_CONTROL_K),0, A_B_LINE,
+ CONTROL('P'),0, A_B_LINE,
+ SK(SK_UP_ARROW),0, A_B_LINE,
+ 'J',0, A_FF_LINE,
+ 'K',0, A_BF_LINE,
+ 'Y',0, A_BF_LINE,
+ 'd',0, A_F_SCROLL,
+ CONTROL('D'),0, A_F_SCROLL,
+ 'u',0, A_B_SCROLL,
+ CONTROL('U'),0, A_B_SCROLL,
+ ' ',0, A_F_SCREEN,
+ 'f',0, A_F_SCREEN,
+ CONTROL('F'),0, A_F_SCREEN,
+ CONTROL('V'),0, A_F_SCREEN,
+ SK(SK_PAGE_DOWN),0, A_F_SCREEN,
+ 'b',0, A_B_SCREEN,
+ CONTROL('B'),0, A_B_SCREEN,
+ ESC,'v',0, A_B_SCREEN,
+ SK(SK_PAGE_UP),0, A_B_SCREEN,
+ 'z',0, A_F_WINDOW,
+ 'w',0, A_B_WINDOW,
+ ESC,' ',0, A_FF_SCREEN,
+ 'F',0, A_F_FOREVER,
+ ESC,'F',0, A_F_UNTIL_HILITE,
+ 'R',0, A_FREPAINT,
+ 'r',0, A_REPAINT,
+ CONTROL('R'),0, A_REPAINT,
+ CONTROL('L'),0, A_REPAINT,
+ ESC,'u',0, A_UNDO_SEARCH,
+ 'g',0, A_GOLINE,
+ SK(SK_HOME),0, A_GOLINE,
+ '<',0, A_GOLINE,
+ ESC,'<',0, A_GOLINE,
+ 'p',0, A_PERCENT,
+ '%',0, A_PERCENT,
+ ESC,'[',0, A_LSHIFT,
+ ESC,']',0, A_RSHIFT,
+ ESC,'(',0, A_LSHIFT,
+ ESC,')',0, A_RSHIFT,
+ SK(SK_RIGHT_ARROW),0, A_RSHIFT,
+ SK(SK_LEFT_ARROW),0, A_LSHIFT,
+ '{',0, A_F_BRACKET|A_EXTRA, '{','}',0,
+ '}',0, A_B_BRACKET|A_EXTRA, '{','}',0,
+ '(',0, A_F_BRACKET|A_EXTRA, '(',')',0,
+ ')',0, A_B_BRACKET|A_EXTRA, '(',')',0,
+ '[',0, A_F_BRACKET|A_EXTRA, '[',']',0,
+ ']',0, A_B_BRACKET|A_EXTRA, '[',']',0,
+ ESC,CONTROL('F'),0, A_F_BRACKET,
+ ESC,CONTROL('B'),0, A_B_BRACKET,
+ 'G',0, A_GOEND,
+ ESC,'G',0, A_GOEND_BUF,
+ ESC,'>',0, A_GOEND,
+ '>',0, A_GOEND,
+ SK(SK_END),0, A_GOEND,
+ 'P',0, A_GOPOS,
+
+ '0',0, A_DIGIT,
+ '1',0, A_DIGIT,
+ '2',0, A_DIGIT,
+ '3',0, A_DIGIT,
+ '4',0, A_DIGIT,
+ '5',0, A_DIGIT,
+ '6',0, A_DIGIT,
+ '7',0, A_DIGIT,
+ '8',0, A_DIGIT,
+ '9',0, A_DIGIT,
+ '.',0, A_DIGIT,
+
+ '=',0, A_STAT,
+ CONTROL('G'),0, A_STAT,
+ ':','f',0, A_STAT,
+ '/',0, A_F_SEARCH,
+ '?',0, A_B_SEARCH,
+ ESC,'/',0, A_F_SEARCH|A_EXTRA, '*',0,
+ ESC,'?',0, A_B_SEARCH|A_EXTRA, '*',0,
+ 'n',0, A_AGAIN_SEARCH,
+ ESC,'n',0, A_T_AGAIN_SEARCH,
+ 'N',0, A_REVERSE_SEARCH,
+ ESC,'N',0, A_T_REVERSE_SEARCH,
+ '&',0, A_FILTER,
+ 'm',0, A_SETMARK,
+ '\'',0, A_GOMARK,
+ CONTROL('X'),CONTROL('X'),0, A_GOMARK,
+ 'E',0, A_EXAMINE,
+ ':','e',0, A_EXAMINE,
+ CONTROL('X'),CONTROL('V'),0, A_EXAMINE,
+ ':','n',0, A_NEXT_FILE,
+ ':','p',0, A_PREV_FILE,
+ 't',0, A_NEXT_TAG,
+ 'T',0, A_PREV_TAG,
+ ':','x',0, A_INDEX_FILE,
+ ':','d',0, A_REMOVE_FILE,
+ '-',0, A_OPT_TOGGLE,
+ ':','t',0, A_OPT_TOGGLE|A_EXTRA, 't',0,
+ 's',0, A_OPT_TOGGLE|A_EXTRA, 'o',0,
+ '_',0, A_DISP_OPTION,
+ '|',0, A_PIPE,
+ 'v',0, A_VISUAL,
+ '!',0, A_SHELL,
+ '+',0, A_FIRSTCMD,
+
+ 'H',0, A_HELP,
+ 'h',0, A_HELP,
+ SK(SK_F1),0, A_HELP,
+ 'V',0, A_VERSION,
+ 'q',0, A_QUIT,
+ 'Q',0, A_QUIT,
+ ':','q',0, A_QUIT,
+ ':','Q',0, A_QUIT,
+ 'Z','Z',0, A_QUIT
+};
+
+static unsigned char edittable[] =
+{
+ '\t',0, EC_F_COMPLETE, /* TAB */
+ '\17',0, EC_B_COMPLETE, /* BACKTAB */
+ SK(SK_BACKTAB),0, EC_B_COMPLETE, /* BACKTAB */
+ ESC,'\t',0, EC_B_COMPLETE, /* ESC TAB */
+ CONTROL('L'),0, EC_EXPAND, /* CTRL-L */
+ CONTROL('V'),0, EC_LITERAL, /* BACKSLASH */
+ CONTROL('A'),0, EC_LITERAL, /* BACKSLASH */
+ ESC,'l',0, EC_RIGHT, /* ESC l */
+ SK(SK_RIGHT_ARROW),0, EC_RIGHT, /* RIGHTARROW */
+ ESC,'h',0, EC_LEFT, /* ESC h */
+ SK(SK_LEFT_ARROW),0, EC_LEFT, /* LEFTARROW */
+ ESC,'b',0, EC_W_LEFT, /* ESC b */
+ ESC,SK(SK_LEFT_ARROW),0, EC_W_LEFT, /* ESC LEFTARROW */
+ SK(SK_CTL_LEFT_ARROW),0, EC_W_LEFT, /* CTRL-LEFTARROW */
+ ESC,'w',0, EC_W_RIGHT, /* ESC w */
+ ESC,SK(SK_RIGHT_ARROW),0, EC_W_RIGHT, /* ESC RIGHTARROW */
+ SK(SK_CTL_RIGHT_ARROW),0, EC_W_RIGHT, /* CTRL-RIGHTARROW */
+ ESC,'i',0, EC_INSERT, /* ESC i */
+ SK(SK_INSERT),0, EC_INSERT, /* INSERT */
+ ESC,'x',0, EC_DELETE, /* ESC x */
+ SK(SK_DELETE),0, EC_DELETE, /* DELETE */
+ ESC,'X',0, EC_W_DELETE, /* ESC X */
+ ESC,SK(SK_DELETE),0, EC_W_DELETE, /* ESC DELETE */
+ SK(SK_CTL_DELETE),0, EC_W_DELETE, /* CTRL-DELETE */
+ SK(SK_CTL_BACKSPACE),0, EC_W_BACKSPACE, /* CTRL-BACKSPACE */
+ ESC,'\b',0, EC_W_BACKSPACE, /* ESC BACKSPACE */
+ ESC,'0',0, EC_HOME, /* ESC 0 */
+ SK(SK_HOME),0, EC_HOME, /* HOME */
+ ESC,'$',0, EC_END, /* ESC $ */
+ SK(SK_END),0, EC_END, /* END */
+ ESC,'k',0, EC_UP, /* ESC k */
+ SK(SK_UP_ARROW),0, EC_UP, /* UPARROW */
+ ESC,'j',0, EC_DOWN, /* ESC j */
+ SK(SK_DOWN_ARROW),0, EC_DOWN, /* DOWNARROW */
+ CONTROL('G'),0, EC_ABORT, /* CTRL-G */
+};
+
+/*
+ * Structure to support a list of command tables.
+ */
+struct tablelist
+{
+ struct tablelist *t_next;
+ char *t_start;
+ char *t_end;
+};
+
+/*
+ * List of command tables and list of line-edit tables.
+ */
+static struct tablelist *list_fcmd_tables = NULL;
+static struct tablelist *list_ecmd_tables = NULL;
+static struct tablelist *list_var_tables = NULL;
+static struct tablelist *list_sysvar_tables = NULL;
+
+
+/*
+ * Expand special key abbreviations in a command table.
+ */
+ static void
+expand_special_keys(table, len)
+ char *table;
+ int len;
+{
+ register char *fm;
+ register char *to;
+ register int a;
+ char *repl;
+ int klen;
+
+ for (fm = table; fm < table + len; )
+ {
+ /*
+ * Rewrite each command in the table with any
+ * special key abbreviations expanded.
+ */
+ for (to = fm; *fm != '\0'; )
+ {
+ if (*fm != SK_SPECIAL_KEY)
+ {
+ *to++ = *fm++;
+ continue;
+ }
+ /*
+ * After SK_SPECIAL_KEY, next byte is the type
+ * of special key (one of the SK_* contants),
+ * and the byte after that is the number of bytes,
+ * N, reserved by the abbreviation (including the
+ * SK_SPECIAL_KEY and key type bytes).
+ * Replace all N bytes with the actual bytes
+ * output by the special key on this terminal.
+ */
+ repl = special_key_str(fm[1]);
+ klen = fm[2] & 0377;
+ fm += klen;
+ if (repl == NULL || (int) strlen(repl) > klen)
+ repl = "\377";
+ while (*repl != '\0')
+ *to++ = *repl++;
+ }
+ *to++ = '\0';
+ /*
+ * Fill any unused bytes between end of command and
+ * the action byte with A_SKIP.
+ */
+ while (to <= fm)
+ *to++ = A_SKIP;
+ fm++;
+ a = *fm++ & 0377;
+ if (a & A_EXTRA)
+ {
+ while (*fm++ != '\0')
+ continue;
+ }
+ }
+}
+
+/*
+ * Initialize the command lists.
+ */
+ public void
+init_cmds()
+{
+ /*
+ * Add the default command tables.
+ */
+ add_fcmd_table((char*)cmdtable, sizeof(cmdtable));
+ add_ecmd_table((char*)edittable, sizeof(edittable));
+#if USERFILE
+ /*
+ * For backwards compatibility,
+ * try to add tables in the OLD system lesskey file.
+ */
+#ifdef BINDIR
+ add_hometable(NULL, BINDIR "/.sysless", 1);
+#endif
+ /*
+ * Try to add the tables in the system lesskey file.
+ */
+ add_hometable("LESSKEY_SYSTEM", LESSKEYFILE_SYS, 1);
+ /*
+ * Try to add the tables in the standard lesskey file "$HOME/.less".
+ */
+ add_hometable("LESSKEY", LESSKEYFILE, 0);
+#endif
+}
+
+/*
+ * Add a command table.
+ */
+ static int
+add_cmd_table(tlist, buf, len)
+ struct tablelist **tlist;
+ char *buf;
+ int len;
+{
+ register struct tablelist *t;
+
+ if (len == 0)
+ return (0);
+ /*
+ * Allocate a tablelist structure, initialize it,
+ * and link it into the list of tables.
+ */
+ if ((t = (struct tablelist *)
+ calloc(1, sizeof(struct tablelist))) == NULL)
+ {
+ return (-1);
+ }
+ expand_special_keys(buf, len);
+ t->t_start = buf;
+ t->t_end = buf + len;
+ t->t_next = *tlist;
+ *tlist = t;
+ return (0);
+}
+
+/*
+ * Add a command table.
+ */
+ public void
+add_fcmd_table(buf, len)
+ char *buf;
+ int len;
+{
+ if (add_cmd_table(&list_fcmd_tables, buf, len) < 0)
+ error("Warning: some commands disabled", NULL_PARG);
+}
+
+/*
+ * Add an editing command table.
+ */
+ public void
+add_ecmd_table(buf, len)
+ char *buf;
+ int len;
+{
+ if (add_cmd_table(&list_ecmd_tables, buf, len) < 0)
+ error("Warning: some edit commands disabled", NULL_PARG);
+}
+
+/*
+ * Add an environment variable table.
+ */
+ static void
+add_var_table(tlist, buf, len)
+ struct tablelist **tlist;
+ char *buf;
+ int len;
+{
+ if (add_cmd_table(tlist, buf, len) < 0)
+ error("Warning: environment variables from lesskey file unavailable", NULL_PARG);
+}
+
+/*
+ * Search a single command table for the command string in cmd.
+ */
+ static int
+cmd_search(cmd, table, endtable, sp)
+ char *cmd;
+ char *table;
+ char *endtable;
+ char **sp;
+{
+ register char *p;
+ register char *q;
+ register int a;
+
+ *sp = NULL;
+ for (p = table, q = cmd; p < endtable; p++, q++)
+ {
+ if (*p == *q)
+ {
+ /*
+ * Current characters match.
+ * If we're at the end of the string, we've found it.
+ * Return the action code, which is the character
+ * after the null at the end of the string
+ * in the command table.
+ */
+ if (*p == '\0')
+ {
+ a = *++p & 0377;
+ while (a == A_SKIP)
+ a = *++p & 0377;
+ if (a == A_END_LIST)
+ {
+ /*
+ * We get here only if the original
+ * cmd string passed in was empty ("").
+ * I don't think that can happen,
+ * but just in case ...
+ */
+ return (A_UINVALID);
+ }
+ /*
+ * Check for an "extra" string.
+ */
+ if (a & A_EXTRA)
+ {
+ *sp = ++p;
+ a &= ~A_EXTRA;
+ }
+ return (a);
+ }
+ } else if (*q == '\0')
+ {
+ /*
+ * Hit the end of the user's command,
+ * but not the end of the string in the command table.
+ * The user's command is incomplete.
+ */
+ return (A_PREFIX);
+ } else
+ {
+ /*
+ * Not a match.
+ * Skip ahead to the next command in the
+ * command table, and reset the pointer
+ * to the beginning of the user's command.
+ */
+ if (*p == '\0' && p[1] == A_END_LIST)
+ {
+ /*
+ * A_END_LIST is a special marker that tells
+ * us to abort the cmd search.
+ */
+ return (A_UINVALID);
+ }
+ while (*p++ != '\0')
+ continue;
+ while (*p == A_SKIP)
+ p++;
+ if (*p & A_EXTRA)
+ while (*++p != '\0')
+ continue;
+ q = cmd-1;
+ }
+ }
+ /*
+ * No match found in the entire command table.
+ */
+ return (A_INVALID);
+}
+
+/*
+ * Decode a command character and return the associated action.
+ * The "extra" string, if any, is returned in sp.
+ */
+ static int
+cmd_decode(tlist, cmd, sp)
+ struct tablelist *tlist;
+ char *cmd;
+ char **sp;
+{
+ register struct tablelist *t;
+ register int action = A_INVALID;
+
+ /*
+ * Search thru all the command tables.
+ * Stop when we find an action which is not A_INVALID.
+ */
+ for (t = tlist; t != NULL; t = t->t_next)
+ {
+ action = cmd_search(cmd, t->t_start, t->t_end, sp);
+ if (action != A_INVALID)
+ break;
+ }
+ if (action == A_UINVALID)
+ action = A_INVALID;
+ return (action);
+}
+
+/*
+ * Decode a command from the cmdtables list.
+ */
+ public int
+fcmd_decode(cmd, sp)
+ char *cmd;
+ char **sp;
+{
+ return (cmd_decode(list_fcmd_tables, cmd, sp));
+}
+
+/*
+ * Decode a command from the edittables list.
+ */
+ public int
+ecmd_decode(cmd, sp)
+ char *cmd;
+ char **sp;
+{
+ return (cmd_decode(list_ecmd_tables, cmd, sp));
+}
+
+/*
+ * Get the value of an environment variable.
+ * Looks first in the lesskey file, then in the real environment.
+ */
+ public char *
+lgetenv(var)
+ char *var;
+{
+ int a;
+ char *s;
+
+ a = cmd_decode(list_var_tables, var, &s);
+ if (a == EV_OK)
+ return (s);
+ s = getenv(var);
+ if (s != NULL && *s != '\0')
+ return (s);
+ a = cmd_decode(list_sysvar_tables, var, &s);
+ if (a == EV_OK)
+ return (s);
+ return (NULL);
+}
+
+#if USERFILE
+/*
+ * Get an "integer" from a lesskey file.
+ * Integers are stored in a funny format:
+ * two bytes, low order first, in radix KRADIX.
+ */
+ static int
+gint(sp)
+ char **sp;
+{
+ int n;
+
+ n = *(*sp)++;
+ n += *(*sp)++ * KRADIX;
+ return (n);
+}
+
+/*
+ * Process an old (pre-v241) lesskey file.
+ */
+ static int
+old_lesskey(buf, len)
+ char *buf;
+ int len;
+{
+ /*
+ * Old-style lesskey file.
+ * The file must end with either
+ * ...,cmd,0,action
+ * or ...,cmd,0,action|A_EXTRA,string,0
+ * So the last byte or the second to last byte must be zero.
+ */
+ if (buf[len-1] != '\0' && buf[len-2] != '\0')
+ return (-1);
+ add_fcmd_table(buf, len);
+ return (0);
+}
+
+/*
+ * Process a new (post-v241) lesskey file.
+ */
+ static int
+new_lesskey(buf, len, sysvar)
+ char *buf;
+ int len;
+ int sysvar;
+{
+ char *p;
+ register int c;
+ register int n;
+
+ /*
+ * New-style lesskey file.
+ * Extract the pieces.
+ */
+ if (buf[len-3] != C0_END_LESSKEY_MAGIC ||
+ buf[len-2] != C1_END_LESSKEY_MAGIC ||
+ buf[len-1] != C2_END_LESSKEY_MAGIC)
+ return (-1);
+ p = buf + 4;
+ for (;;)
+ {
+ c = *p++;
+ switch (c)
+ {
+ case CMD_SECTION:
+ n = gint(&p);
+ add_fcmd_table(p, n);
+ p += n;
+ break;
+ case EDIT_SECTION:
+ n = gint(&p);
+ add_ecmd_table(p, n);
+ p += n;
+ break;
+ case VAR_SECTION:
+ n = gint(&p);
+ add_var_table((sysvar) ?
+ &list_sysvar_tables : &list_var_tables, p, n);
+ p += n;
+ break;
+ case END_SECTION:
+ return (0);
+ default:
+ /*
+ * Unrecognized section type.
+ */
+ return (-1);
+ }
+ }
+}
+
+/*
+ * Set up a user command table, based on a "lesskey" file.
+ */
+ public int
+lesskey(filename, sysvar)
+ char *filename;
+ int sysvar;
+{
+ register char *buf;
+ register POSITION len;
+ register long n;
+ register int f;
+
+ if (secure)
+ return (1);
+ /*
+ * Try to open the lesskey file.
+ */
+ filename = shell_unquote(filename);
+ f = open(filename, OPEN_READ);
+ free(filename);
+ if (f < 0)
+ return (1);
+
+ /*
+ * Read the file into a buffer.
+ * We first figure out the size of the file and allocate space for it.
+ * {{ Minimal error checking is done here.
+ * A garbage .less file will produce strange results.
+ * To avoid a large amount of error checking code here, we
+ * rely on the lesskey program to generate a good .less file. }}
+ */
+ len = filesize(f);
+ if (len == NULL_POSITION || len < 3)
+ {
+ /*
+ * Bad file (valid file must have at least 3 chars).
+ */
+ close(f);
+ return (-1);
+ }
+ if ((buf = (char *) calloc((int)len, sizeof(char))) == NULL)
+ {
+ close(f);
+ return (-1);
+ }
+ if (lseek(f, (off_t)0, SEEK_SET) == BAD_LSEEK)
+ {
+ free(buf);
+ close(f);
+ return (-1);
+ }
+ n = read(f, buf, (unsigned int) len);
+ close(f);
+ if (n != len)
+ {
+ free(buf);
+ return (-1);
+ }
+
+ /*
+ * Figure out if this is an old-style (before version 241)
+ * or new-style lesskey file format.
+ */
+ if (buf[0] != C0_LESSKEY_MAGIC || buf[1] != C1_LESSKEY_MAGIC ||
+ buf[2] != C2_LESSKEY_MAGIC || buf[3] != C3_LESSKEY_MAGIC)
+ return (old_lesskey(buf, (int)len));
+ return (new_lesskey(buf, (int)len, sysvar));
+}
+
+/*
+ * Add the standard lesskey file "$HOME/.less"
+ */
+ public void
+add_hometable(envname, def_filename, sysvar)
+ char *envname;
+ char *def_filename;
+ int sysvar;
+{
+ char *filename;
+ PARG parg;
+
+ if (envname != NULL && (filename = lgetenv(envname)) != NULL)
+ filename = save(filename);
+ else if (sysvar)
+ filename = save(def_filename);
+ else
+ filename = homefile(def_filename);
+ if (filename == NULL)
+ return;
+ if (lesskey(filename, sysvar) < 0)
+ {
+ parg.p_string = filename;
+ error("Cannot use lesskey file \"%s\"", &parg);
+ }
+ free(filename);
+}
+#endif
+
+/*
+ * See if a char is a special line-editing command.
+ */
+ public int
+editchar(c, flags)
+ int c;
+ int flags;
+{
+ int action;
+ int nch;
+ char *s;
+ char usercmd[MAX_CMDLEN+1];
+
+ /*
+ * An editing character could actually be a sequence of characters;
+ * for example, an escape sequence sent by pressing the uparrow key.
+ * To match the editing string, we use the command decoder
+ * but give it the edit-commands command table
+ * This table is constructed to match the user's keyboard.
+ */
+ if (c == erase_char || c == erase2_char)
+ return (EC_BACKSPACE);
+ if (c == kill_char)
+ return (EC_LINEKILL);
+
+ /*
+ * Collect characters in a buffer.
+ * Start with the one we have, and get more if we need them.
+ */
+ nch = 0;
+ do {
+ if (nch > 0)
+ c = getcc();
+ usercmd[nch] = c;
+ usercmd[nch+1] = '\0';
+ nch++;
+ action = ecmd_decode(usercmd, &s);
+ } while (action == A_PREFIX);
+
+ if (flags & EC_NORIGHTLEFT)
+ {
+ switch (action)
+ {
+ case EC_RIGHT:
+ case EC_LEFT:
+ action = A_INVALID;
+ break;
+ }
+ }
+#if CMD_HISTORY
+ if (flags & EC_NOHISTORY)
+ {
+ /*
+ * The caller says there is no history list.
+ * Reject any history-manipulation action.
+ */
+ switch (action)
+ {
+ case EC_UP:
+ case EC_DOWN:
+ action = A_INVALID;
+ break;
+ }
+ }
+#endif
+#if TAB_COMPLETE_FILENAME
+ if (flags & EC_NOCOMPLETE)
+ {
+ /*
+ * The caller says we don't want any filename completion cmds.
+ * Reject them.
+ */
+ switch (action)
+ {
+ case EC_F_COMPLETE:
+ case EC_B_COMPLETE:
+ case EC_EXPAND:
+ action = A_INVALID;
+ break;
+ }
+ }
+#endif
+ if ((flags & EC_PEEK) || action == A_INVALID)
+ {
+ /*
+ * We're just peeking, or we didn't understand the command.
+ * Unget all the characters we read in the loop above.
+ * This does NOT include the original character that was
+ * passed in as a parameter.
+ */
+ while (nch > 1)
+ {
+ ungetcc(usercmd[--nch]);
+ }
+ } else
+ {
+ if (s != NULL)
+ ungetsc(s);
+ }
+ return action;
+}
+
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/* DOS definition file for less. */
+/*
+ * This file has 2 sections:
+ * User preferences.
+ * Settings always true for MS-DOS systems.
+ */
+\f
+/* User preferences. */
+
+/*
+ * SECURE is 1 if you wish to disable a bunch of features in order to
+ * be safe to run by unprivileged users.
+ */
+#define SECURE 0
+
+/*
+ * SHELL_ESCAPE is 1 if you wish to allow shell escapes.
+ * (This is possible only if your system supplies the system() function.)
+ */
+#define SHELL_ESCAPE (!SECURE)
+
+/*
+ * EXAMINE is 1 if you wish to allow examining files by name from within less.
+ */
+#define EXAMINE (!SECURE)
+
+/*
+ * TAB_COMPLETE_FILENAME is 1 if you wish to allow the TAB key
+ * to complete filenames at prompts.
+ */
+#define TAB_COMPLETE_FILENAME (!SECURE)
+
+/*
+ * CMD_HISTORY is 1 if you wish to allow keys to cycle through
+ * previous commands at prompts.
+ */
+#define CMD_HISTORY 1
+
+/*
+ * HILITE_SEARCH is 1 if you wish to have search targets to be
+ * displayed in standout mode.
+ */
+#define HILITE_SEARCH 1
+
+/*
+ * EDITOR is 1 if you wish to allow editor invocation (the "v" command).
+ * (This is possible only if your system supplies the system() function.)
+ * EDIT_PGM is the name of the (default) editor to be invoked.
+ */
+#define EDITOR (!SECURE)
+#define EDIT_PGM "vi"
+
+/*
+ * TAGS is 1 if you wish to support tag files.
+ */
+#define TAGS (!SECURE)
+
+/*
+ * USERFILE is 1 if you wish to allow a .less file to specify
+ * user-defined key bindings.
+ */
+#define USERFILE (!SECURE)
+
+/*
+ * GLOB is 1 if you wish to have shell metacharacters expanded in filenames.
+ * This will generally work if your system provides the "popen" function
+ * and the "echo" shell command.
+ */
+#ifdef __DJGPP__
+#define GLOB (!SECURE)
+#else
+#define GLOB 0
+#endif
+
+/*
+ * PIPEC is 1 if you wish to have the "|" command
+ * which allows the user to pipe data into a shell command.
+ */
+#ifdef __DJGPP__
+#define PIPEC (!SECURE)
+#else
+#define PIPEC 0
+#endif
+
+/*
+ * LOGFILE is 1 if you wish to allow the -l option (to create log files).
+ */
+#define LOGFILE (!SECURE)
+
+/*
+ * GNU_OPTIONS is 1 if you wish to support the GNU-style command
+ * line options --help and --version.
+ */
+#define GNU_OPTIONS 1
+
+/*
+ * ONLY_RETURN is 1 if you want RETURN to be the only input which
+ * will continue past an error message.
+ * Otherwise, any key will continue past an error message.
+ */
+#define ONLY_RETURN 0
+
+/*
+ * LESSKEYFILE is the filename of the default lesskey output file
+ * (in the HOME directory).
+ * LESSKEYFILE_SYS is the filename of the system-wide lesskey output file.
+ * DEF_LESSKEYINFILE is the filename of the default lesskey input
+ * (in the HOME directory).
+ * LESSHISTFILE is the filename of the history file
+ * (in the HOME directory).
+ */
+#define LESSKEYFILE "_less"
+#define LESSKEYFILE_SYS "c:\\_sysless"
+#define DEF_LESSKEYINFILE "_lesskey"
+#define LESSHISTFILE "_lesshst"
+
+\f
+/* Settings always true for MS-DOS systems. */
+
+/*
+ * Define MSDOS_COMPILER if compiling for MS-DOS.
+ */
+#ifdef __DJGPP__
+#define MSDOS_COMPILER DJGPPC
+#else
+#ifdef __BORLANDC__
+#define MSDOS_COMPILER BORLANDC
+#else
+#define MSDOS_COMPILER MSOFTC
+#endif
+#endif
+
+/*
+ * Pathname separator character.
+ */
+#define PATHNAME_SEP "\\"
+
+/*
+ * HAVE_SYS_TYPES_H is 1 if your system has <sys/types.h>.
+ */
+#define HAVE_SYS_TYPES_H 1
+
+/*
+ * Define if you have the <sgstat.h> header file.
+ */
+#define HAVE_SGSTAT_H 0
+
+/*
+ * HAVE_PERROR is 1 if your system has the perror() call.
+ * (Actually, if it has sys_errlist, sys_nerr and errno.)
+ */
+#define HAVE_PERROR 1
+
+/*
+ * HAVE_TIME is 1 if your system has the time() call.
+ */
+#define HAVE_TIME 1
+
+/*
+ * HAVE_SHELL is 1 if your system supports a SHELL command interpreter.
+ */
+#define HAVE_SHELL 0
+
+/*
+ * Default shell metacharacters and meta-escape character.
+ */
+#define DEF_METACHARS "; *?\t\n'\"()<>|&"
+#define DEF_METAESCAPE ""
+
+/*
+ * HAVE_DUP is 1 if your system has the dup() call.
+ */
+#define HAVE_DUP 1
+
+/*
+ * Sizes of various buffers.
+ */
+#if 0 /* old sizes for small memory machines
+#define CMDBUF_SIZE 512 /* Buffer for multichar commands */
+#define UNGOT_SIZE 100 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 200 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 512 /* Max size of line in tags file */
+#define TABSTOP_MAX 32 /* Max number of custom tab stops */
+#else /* more reasonable sizes for modern machines */
+#define CMDBUF_SIZE 2048 /* Buffer for multichar commands */
+#define UNGOT_SIZE 200 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Initial max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 2048 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 1024 /* Max size of line in tags file */
+#define TABSTOP_MAX 128 /* Max number of custom tab stops */
+#endif
+
+/* Define to `long' if <sys/types.h> doesn't define. */
+#if MSDOS_COMPILER==BORLANDC
+#define off_t long
+#endif
+
+/* Define if you need to in order for stat and other things to work. */
+/* #undef _POSIX_SOURCE */
+
+/* Define as the return type of signal handlers (int or void). */
+#define RETSIGTYPE void
+
+
+/*
+ * Regular expression library.
+ * Define exactly one of the following to be 1:
+ * HAVE_POSIX_REGCOMP: POSIX regcomp() and regex.h
+ * HAVE_RE_COMP: BSD re_comp()
+ * HAVE_REGCMP: System V regcmp()
+ * HAVE_V8_REGCOMP: Henry Spencer V8 regcomp() and regexp.h
+ * NO_REGEX: pattern matching is supported, but without metacharacters.
+ */
+/* #undef HAVE_POSIX_REGCOMP */
+/* #undef HAVE_RE_COMP */
+/* #undef HAVE_REGCMP */
+/* #undef HAVE_V8_REGCOMP */
+#if MSDOS_COMPILER==DJGPPC
+#define HAVE_POSIX_REGCOMP 1
+#else
+#define NO_REGEX 1
+#endif
+
+/* Define HAVE_VOID if your compiler supports the "void" type. */
+#define HAVE_VOID 1
+
+/* Define HAVE_CONST if your compiler supports the "const" modifier. */
+#define HAVE_CONST 1
+
+/* Define HAVE_TIME_T if your system supports the "time_t" type. */
+#define HAVE_TIME_T 1
+
+/* Define HAVE_STRERROR if you have the strerror() function. */
+#define HAVE_STRERROR 1
+
+/* Define HAVE_FILENO if you have the fileno() macro. */
+#define HAVE_FILENO 1
+
+/* Define HAVE_ERRNO if you have the errno variable */
+/* Define MUST_DEFINE_ERRNO if you have errno but it is not defined
+ * in errno.h */
+#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==DJGPPC
+#define HAVE_ERRNO 1
+#define MUST_DEFINE_ERRNO 0
+#else
+#define HAVE_ERRNO 1
+#define MUST_DEFINE_ERRNO 1
+#endif
+
+/* Define HAVE_SYS_ERRLIST if you have the sys_errlist[] variable */
+#define HAVE_SYS_ERRLIST 1
+
+/* Define HAVE_OSPEED if your termcap library has the ospeed variable */
+/* Define MUST_DEFINE_OSPEED if you have ospeed but it is not defined
+ * in termcap.h. */
+#define HAVE_OSPEED 0
+#define MUST_DEFINE_OSPEED 0
+
+/* Define HAVE_LOCALE if you have locale.h and setlocale. */
+#define HAVE_LOCALE 0
+
+/* Define HAVE_TERMIOS_FUNCS if you have tcgetattr/tcsetattr */
+#define HAVE_TERMIOS_FUNCS 0
+
+/* Define HAVE_UPPER_LOWER if you have isupper, islower, toupper, tolower */
+#define HAVE_UPPER_LOWER 1
+
+/* Define if you have the _setjmp function. */
+#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==DJGPPC
+#define HAVE__SETJMP 0
+#else
+#define HAVE__SETJMP 1
+#endif
+
+/* Define if you have the memcpy function. */
+#define HAVE_MEMCPY 1
+
+/* Define if you have the popen function. */
+#if MSDOS_COMPILER==DJGPPC
+#define HAVE_POPEN 1
+#else
+#define HAVE_POPEN 0
+#endif
+
+/* Define if you have the sigsetmask function. */
+#define HAVE_SIGSETMASK 0
+
+/* Define if you have the sigprocmask function. */
+#define HAVE_SIGPROCMASK 0
+
+/* Define if you have the sigset_t type and sigemptyset macro */
+#define HAVE_SIGSET_T 0
+#define HAVE_SIGEMPTYSET 0
+
+/* Define if you have the stat function. */
+#define HAVE_STAT 1
+
+/* Define if you have the strchr function. */
+#define HAVE_STRCHR 1
+
+/* Define if you have the system function. */
+#define HAVE_SYSTEM 1
+
+/* Define if you have the snprintf function. */
+#define HAVE_SNPRINTF 0
+
+/* Define if you have the <ctype.h> header file. */
+#define HAVE_CTYPE_H 1
+
+/* Define if you have the <wctype.h> header file. */
+#define HAVE_WCTYPE_H 0
+
+/* Define if you have the <errno.h> header file. */
+#define HAVE_ERRNO_H 1
+
+/* Define if you have the <fcntl.h> header file. */
+#define HAVE_FCNTL_H 1
+
+/* Define HAVE_FLOAT if your compiler supports the "double" type. */
+#define HAVE_FLOAT 1
+
+/* Define if you have the <limits.h> header file. */
+#define HAVE_LIMITS_H 1
+
+/* Define if you have the <stdio.h> header file. */
+#define HAVE_STDIO_H 1
+
+/* Define if you have the <stdlib> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define if you have the <sys/ioctl.h> header file. */
+#define HAVE_SYS_IOCTL_H 0
+
+/* Define if you have the <sys/ptem.h> header file. */
+#define HAVE_SYS_PTEM_H 0
+
+/* Define if you have the <sys/stream.h> header file. */
+#define HAVE_SYS_STREAM_H 0
+
+/* Define if you have the <termcap.h> header file. */
+#define HAVE_TERMCAP_H 0
+
+/* Define if you have the <termio.h> header file. */
+#define HAVE_TERMIO_H 0
+
+/* Define if you have the <termios.h> header file. */
+#define HAVE_TERMIOS_H 0
+
+/* Define if you have the <time.h> header file. */
+#define HAVE_TIME_H 1
+
+/* Define if you have the <unistd.h> header file. */
+#if MSDOS_COMPILER==DJGPPC
+#define HAVE_UNISTD_H 1
+#else
+#define HAVE_UNISTD_H 0
+#endif
+
+/* Define if you have the <values.h> header file. */
+#if MSDOS_COMPILER==MSOFTC
+#define HAVE_VALUES_H 0
+#else
+#define HAVE_VALUES_H 1
+#endif
+
+#if MSDOS_COMPILER == MSOFTC && _MSC_VER >= 700
+/*
+ * The names of these things changed in Microsoft C version 7.0.
+ */
+#define videoconfig _videoconfig
+#define rccoord _rccoord
+#define O_RDONLY _O_RDONLY
+#define O_WRONLY _O_WRONLY
+#define O_APPEND _O_APPEND
+#define O_BINARY _O_BINARY
+#define O_TEXT _O_TEXT
+#define find_t _find_t
+#define stat _stat
+#define S_IFMT _S_IFMT
+#define S_IFDIR _S_IFDIR
+#define S_IFREG _S_IFREG
+#define dup _dup
+#define open _open
+#define lseek _lseek
+#define write _write
+#define creat _creat
+#define fstat _fstat
+#define isatty _isatty
+#define close _close
+#define read _read
+#define ungetch _ungetch
+#define kbhit _kbhit
+#define getch _getch
+#endif
--- /dev/null
+/* defines.h.in. Generated from configure.ac by autoheader. */
+
+
+/* Unix definition file for less. -*- C -*-
+ *
+ * This file has 3 sections:
+ * User preferences.
+ * Settings always true on Unix.
+ * Settings automatically determined by configure.
+ *
+ * * * * * * WARNING * * * * * *
+ * If you edit defines.h by hand, do "touch stamp-h" before you run make
+ * so config.status doesn't overwrite your changes.
+ */
+
+/* User preferences. */
+
+/*
+ * SECURE is 1 if you wish to disable a bunch of features in order to
+ * be safe to run by unprivileged users.
+ * SECURE_COMPILE is set by the --with-secure configure option.
+ */
+#define SECURE SECURE_COMPILE
+
+/*
+ * SHELL_ESCAPE is 1 if you wish to allow shell escapes.
+ * (This is possible only if your system supplies the system() function.)
+ */
+#define SHELL_ESCAPE (!SECURE)
+
+/*
+ * EXAMINE is 1 if you wish to allow examining files by name from within less.
+ */
+#define EXAMINE (!SECURE)
+
+/*
+ * TAB_COMPLETE_FILENAME is 1 if you wish to allow the TAB key
+ * to complete filenames at prompts.
+ */
+#define TAB_COMPLETE_FILENAME (!SECURE)
+
+/*
+ * CMD_HISTORY is 1 if you wish to allow keys to cycle through
+ * previous commands at prompts.
+ */
+#define CMD_HISTORY 1
+
+/*
+ * HILITE_SEARCH is 1 if you wish to have search targets to be
+ * displayed in standout mode.
+ */
+#define HILITE_SEARCH 1
+
+/*
+ * EDITOR is 1 if you wish to allow editor invocation (the "v" command).
+ * (This is possible only if your system supplies the system() function.)
+ * EDIT_PGM is the name of the (default) editor to be invoked.
+ */
+#define EDITOR (!SECURE)
+
+/*
+ * TAGS is 1 if you wish to support tag files.
+ */
+#define TAGS (!SECURE)
+
+/*
+ * USERFILE is 1 if you wish to allow a .less file to specify
+ * user-defined key bindings.
+ */
+#define USERFILE (!SECURE)
+
+/*
+ * GLOB is 1 if you wish to have shell metacharacters expanded in filenames.
+ * This will generally work if your system provides the "popen" function
+ * and the "echo" shell command.
+ */
+#define GLOB (!SECURE)
+
+/*
+ * PIPEC is 1 if you wish to have the "|" command
+ * which allows the user to pipe data into a shell command.
+ */
+#define PIPEC (!SECURE)
+
+/*
+ * LOGFILE is 1 if you wish to allow the -l option (to create log files).
+ */
+#define LOGFILE (!SECURE)
+
+/*
+ * GNU_OPTIONS is 1 if you wish to support the GNU-style command
+ * line options --help and --version.
+ */
+#define GNU_OPTIONS 1
+
+/*
+ * ONLY_RETURN is 1 if you want RETURN to be the only input which
+ * will continue past an error message.
+ * Otherwise, any key will continue past an error message.
+ */
+#define ONLY_RETURN 0
+
+/*
+ * LESSKEYFILE is the filename of the default lesskey output file
+ * (in the HOME directory).
+ * LESSKEYFILE_SYS is the filename of the system-wide lesskey output file.
+ * DEF_LESSKEYINFILE is the filename of the default lesskey input
+ * (in the HOME directory).
+ * LESSHISTFILE is the filename of the history file
+ * (in the HOME directory).
+ */
+#define LESSKEYFILE ".less"
+#define LESSKEYFILE_SYS SYSDIR "/sysless"
+#define DEF_LESSKEYINFILE ".lesskey"
+#define LESSHISTFILE ".lesshst"
+
+
+/* Settings always true on Unix. */
+
+/*
+ * Define MSDOS_COMPILER if compiling under Microsoft C.
+ */
+#define MSDOS_COMPILER 0
+
+/*
+ * Pathname separator character.
+ */
+#define PATHNAME_SEP "/"
+
+/*
+ * The value returned from tgetent on success.
+ * Some HP-UX systems return 0 on success.
+ */
+#define TGETENT_OK 1
+
+/*
+ * HAVE_SYS_TYPES_H is 1 if your system has <sys/types.h>.
+ */
+#define HAVE_SYS_TYPES_H 1
+
+/*
+ * Define if you have the <sgstat.h> header file.
+ */
+#undef HAVE_SGSTAT_H
+
+/*
+ * HAVE_PERROR is 1 if your system has the perror() call.
+ * (Actually, if it has sys_errlist, sys_nerr and errno.)
+ */
+#define HAVE_PERROR 1
+
+/*
+ * HAVE_TIME is 1 if your system has the time() call.
+ */
+#define HAVE_TIME 1
+
+/*
+ * HAVE_SHELL is 1 if your system supports a SHELL command interpreter.
+ */
+#define HAVE_SHELL 1
+
+/*
+ * Default shell metacharacters and meta-escape character.
+ */
+#define DEF_METACHARS "; *?\t\n'\"()<>[]|&^`#\\$%=~"
+#define DEF_METAESCAPE "\\"
+
+/*
+ * HAVE_DUP is 1 if your system has the dup() call.
+ */
+#define HAVE_DUP 1
+
+/* Define to 1 if you have the memcpy() function. */
+#define HAVE_MEMCPY 1
+
+/* Define to 1 if you have the strchr() function. */
+#define HAVE_STRCHR 1
+
+/* Define to 1 if you have the strstr() function. */
+#define HAVE_STRSTR 1
+
+/*
+ * Sizes of various buffers.
+ */
+#if 0 /* old sizes for small memory machines */
+#define CMDBUF_SIZE 512 /* Buffer for multichar commands */
+#define UNGOT_SIZE 100 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 200 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 512 /* Max size of line in tags file */
+#define TABSTOP_MAX 32 /* Max number of custom tab stops */
+#else /* more reasonable sizes for modern machines */
+#define CMDBUF_SIZE 2048 /* Buffer for multichar commands */
+#define UNGOT_SIZE 200 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Initial max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 2048 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 1024 /* Max size of line in tags file */
+#define TABSTOP_MAX 128 /* Max number of custom tab stops */
+#endif
+
+/* Settings automatically determined by configure. */
+
+
+/* Define EDIT_PGM to your editor. */
+#undef EDIT_PGM
+
+/* Define HAVE_CONST if your compiler supports the "const" modifier. */
+#undef HAVE_CONST
+
+/* Define to 1 if you have the <ctype.h> header file. */
+#undef HAVE_CTYPE_H
+
+/* Define HAVE_ERRNO if you have the errno variable. */
+#undef HAVE_ERRNO
+
+/* Define to 1 if you have the <errno.h> header file. */
+#undef HAVE_ERRNO_H
+
+/* Define to 1 if you have the `fchmod' function. */
+#undef HAVE_FCHMOD
+
+/* Define to 1 if you have the <fcntl.h> header file. */
+#undef HAVE_FCNTL_H
+
+/* Define HAVE_FILENO if you have the fileno() macro. */
+#undef HAVE_FILENO
+
+/* Define HAVE_FLOAT if your compiler supports the "double" type. */
+#undef HAVE_FLOAT
+
+/* Define to 1 if you have the `fsync' function. */
+#undef HAVE_FSYNC
+
+/* GNU regex library */
+#undef HAVE_GNU_REGEX
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define to 1 if you have the <limits.h> header file. */
+#undef HAVE_LIMITS_H
+
+/* Define HAVE_LOCALE if you have locale.h and setlocale. */
+#undef HAVE_LOCALE
+
+/* Define to 1 if you have the <memory.h> header file. */
+#undef HAVE_MEMORY_H
+
+/* Define HAVE_OSPEED if your termcap library has the ospeed variable. */
+#undef HAVE_OSPEED
+
+/* PCRE (Perl-compatible regular expression) library */
+#undef HAVE_PCRE
+
+/* Define to 1 if you have the `popen' function. */
+#undef HAVE_POPEN
+
+/* POSIX regcomp() and regex.h */
+#undef HAVE_POSIX_REGCOMP
+
+/* System V regcmp() */
+#undef HAVE_REGCMP
+
+/* */
+#undef HAVE_REGEXEC2
+
+/* BSD re_comp() */
+#undef HAVE_RE_COMP
+
+/* Define HAVE_SIGEMPTYSET if you have the sigemptyset macro. */
+#undef HAVE_SIGEMPTYSET
+
+/* Define to 1 if you have the `sigprocmask' function. */
+#undef HAVE_SIGPROCMASK
+
+/* Define to 1 if you have the `sigsetmask' function. */
+#undef HAVE_SIGSETMASK
+
+/* Define to 1 if the system has the type `sigset_t'. */
+#undef HAVE_SIGSET_T
+
+/* Define to 1 if you have the `snprintf' function. */
+#undef HAVE_SNPRINTF
+
+/* Define to 1 if you have the `stat' function. */
+#undef HAVE_STAT
+
+/* Define HAVE_STAT_INO if your struct stat has st_ino and st_dev. */
+#undef HAVE_STAT_INO
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdio.h> header file. */
+#undef HAVE_STDIO_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define HAVE_STRERROR if you have the strerror() function. */
+#undef HAVE_STRERROR
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the `system' function. */
+#undef HAVE_SYSTEM
+
+/* Define HAVE_SYS_ERRLIST if you have the sys_errlist[] variable. */
+#undef HAVE_SYS_ERRLIST
+
+/* Define to 1 if you have the <sys/ioctl.h> header file. */
+#undef HAVE_SYS_IOCTL_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/stream.h> header file. */
+#undef HAVE_SYS_STREAM_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <termcap.h> header file. */
+#undef HAVE_TERMCAP_H
+
+/* Define HAVE_TERMIOS_FUNCS if you have tcgetattr/tcsetattr. */
+#undef HAVE_TERMIOS_FUNCS
+
+/* Define to 1 if you have the <termios.h> header file. */
+#undef HAVE_TERMIOS_H
+
+/* Define to 1 if you have the <termio.h> header file. */
+#undef HAVE_TERMIO_H
+
+/* Define to 1 if you have the <time.h> header file. */
+#undef HAVE_TIME_H
+
+/* Define HAVE_TIME_T if your system supports the "time_t" type. */
+#undef HAVE_TIME_T
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define HAVE_UPPER_LOWER if you have isupper, islower, toupper, tolower. */
+#undef HAVE_UPPER_LOWER
+
+/* Henry Spencer V8 regcomp() and regexp.h */
+#undef HAVE_V8_REGCOMP
+
+/* Define to 1 if you have the <values.h> header file. */
+#undef HAVE_VALUES_H
+
+/* Define HAVE_VOID if your compiler supports the "void" type. */
+#undef HAVE_VOID
+
+/* Define HAVE_WCTYPE if you have iswupper, iswlower, towupper, towlower. */
+#undef HAVE_WCTYPE
+
+/* Define to 1 if you have the <wctype.h> header file. */
+#undef HAVE_WCTYPE_H
+
+/* Define to 1 if you have the `_setjmp' function. */
+#undef HAVE__SETJMP
+
+/* Define MUST_DEFINE_ERRNO if you have errno but it is not define in errno.h.
+ */
+#undef MUST_DEFINE_ERRNO
+
+/* Define MUST_DEFINE_OSPEED if you have ospeed but it is not defined in
+ termcap.h. */
+#undef MUST_DEFINE_OSPEED
+
+/* pattern matching is supported, but without metacharacters. */
+#undef NO_REGEX
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* Define as the return type of signal handlers (`int' or `void'). */
+#undef RETSIGTYPE
+
+/* Define SECURE_COMPILE=1 to build a secure version of less. */
+#undef SECURE_COMPILE
+
+/* Define to 1 if the `S_IS*' macros in <sys/stat.h> do not work properly. */
+#undef STAT_MACROS_BROKEN
+
+/* Define to 1 if you have the ANSI C header files. */
+#undef STDC_HEADERS
+
+/* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
+#undef TIME_WITH_SYS_TIME
+
+/* Enable large inode numbers on Mac OS X 10.5. */
+#ifndef _DARWIN_USE_64_BIT_INODE
+# define _DARWIN_USE_64_BIT_INODE 1
+#endif
+
+/* Number of bits in a file offset, on hosts where this is settable. */
+#undef _FILE_OFFSET_BITS
+
+/* Define for large files, on AIX-style hosts. */
+#undef _LARGE_FILES
+
+/* Define to empty if `const' does not conform to ANSI C. */
+#undef const
+
+/* Define to `long int' if <sys/types.h> does not define. */
+#undef off_t
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/* OS/2 definition file for less. */
+/*
+ * This file has 2 sections:
+ * User preferences.
+ * Settings always true for the emx compiler for OS/2 systems.
+ */
+
+\f
+/* User preferences. */
+
+/*
+ * SECURE is 1 if you wish to disable a bunch of features in order to
+ * be safe to run by unprivileged users.
+ */
+#define SECURE 0
+
+/*
+ * SHELL_ESCAPE is 1 if you wish to allow shell escapes.
+ * (This is possible only if your system supplies the system() function.)
+ */
+#define SHELL_ESCAPE (!SECURE)
+
+/*
+ * EXAMINE is 1 if you wish to allow examining files by name from within less.
+ */
+#define EXAMINE (!SECURE)
+
+/*
+ * TAB_COMPLETE_FILENAME is 1 if you wish to allow the TAB key
+ * to complete filenames at prompts.
+ */
+#define TAB_COMPLETE_FILENAME (!SECURE)
+
+/*
+ * CMD_HISTORY is 1 if you wish to allow keys to cycle through
+ * previous commands at prompts.
+ */
+#define CMD_HISTORY 1
+
+/*
+ * HILITE_SEARCH is 1 if you wish to have search targets to be
+ * displayed in standout mode.
+ */
+#define HILITE_SEARCH 1
+
+/*
+ * EDITOR is 1 if you wish to allow editor invocation (the "v" command).
+ * (This is possible only if your system supplies the system() function.)
+ * EDIT_PGM is the name of the (default) editor to be invoked.
+ */
+#define EDITOR (!SECURE)
+#define EDIT_PGM "vi"
+
+/*
+ * TAGS is 1 if you wish to support tag files.
+ */
+#define TAGS (!SECURE)
+
+/*
+ * USERFILE is 1 if you wish to allow a .less file to specify
+ * user-defined key bindings.
+ */
+#define USERFILE (!SECURE)
+
+/*
+ * GLOB is 1 if you wish to have shell metacharacters expanded in filenames.
+ * This will generally work if your system provides the "popen" function
+ * and the "echo" shell command.
+ */
+#define GLOB (!SECURE)
+
+/*
+ * PIPEC is 1 if you wish to have the "|" command
+ * which allows the user to pipe data into a shell command.
+ */
+#define PIPEC (!SECURE)
+
+/*
+ * LOGFILE is 1 if you wish to allow the -l option (to create log files).
+ */
+#define LOGFILE (!SECURE)
+
+/*
+ * GNU_OPTIONS is 1 if you wish to support the GNU-style command
+ * line options --help and --version.
+ */
+#define GNU_OPTIONS 1
+
+/*
+ * ONLY_RETURN is 1 if you want RETURN to be the only input which
+ * will continue past an error message.
+ * Otherwise, any key will continue past an error message.
+ */
+#define ONLY_RETURN 0
+
+/*
+ * LESSKEYFILE is the filename of the default lesskey output file
+ * (in the HOME directory).
+ * LESSKEYFILE_SYS is the filename of the system-wide lesskey output file.
+ * DEF_LESSKEYINFILE is the filename of the default lesskey input
+ * (in the HOME directory).
+ * LESSHISTFILE is the filename of the history file
+ * (in the HOME directory).
+ */
+#define LESSKEYFILE "less.ini"
+#define LESSKEYFILE_SYS "C:\\sysless.ini"
+#define DEF_LESSKEYINFILE "lesskey.ini"
+#define LESSHISTFILE "lesshst.ini"
+
+\f
+/* Settings always true for the emx compiler for OS/2 systems. */
+#define OS2 1
+
+/*
+ * Pathname separator character.
+ */
+#define PATHNAME_SEP "\\"
+
+/*
+ * HAVE_SYS_TYPES_H is 1 if your system has <sys/types.h>.
+ */
+#define HAVE_SYS_TYPES_H 1
+
+/*
+ * Define if you have the <sgstat.h> header file.
+ */
+#define HAVE_SGSTAT_H 0
+
+/*
+ * HAVE_PERROR is 1 if your system has the perror() call.
+ * (Actually, if it has sys_errlist, sys_nerr and errno.)
+ */
+#define HAVE_PERROR 1
+
+/*
+ * HAVE_TIME is 1 if your system has the time() call.
+ */
+#define HAVE_TIME 1
+
+/*
+ * HAVE_SHELL is 1 if your system supports a SHELL command interpreter.
+ */
+#define HAVE_SHELL 0
+
+/*
+ * Default shell metacharacters and meta-escape character.
+ */
+#define DEF_METACHARS "; *?\t\n'\"()<>|&"
+#define DEF_METAESCAPE ""
+
+/*
+ * HAVE_DUP is 1 if your system has the dup() call.
+ */
+#define HAVE_DUP 1
+
+/*
+ * Sizes of various buffers.
+ */
+#if 0 /* old sizes for small memory machines
+#define CMDBUF_SIZE 512 /* Buffer for multichar commands */
+#define UNGOT_SIZE 100 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 200 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 512 /* Max size of line in tags file */
+#define TABSTOP_MAX 32 /* Max number of custom tab stops */
+#else /* more reasonable sizes for modern machines */
+#define CMDBUF_SIZE 2048 /* Buffer for multichar commands */
+#define UNGOT_SIZE 200 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Initial max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 2048 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 1024 /* Max size of line in tags file */
+#define TABSTOP_MAX 128 /* Max number of custom tab stops */
+#endif
+
+/* Define to `long' if <sys/types.h> doesn't define. */
+/* #define off_t long */
+
+/* Define if you need to in order for stat and other things to work. */
+/* #undef _POSIX_SOURCE */
+
+/* Define as the return type of signal handlers (int or void). */
+#define RETSIGTYPE void
+
+
+/*
+ * Regular expression library.
+ * Define exactly one of the following to be 1:
+ * HAVE_POSIX_REGCOMP: POSIX regcomp() and regex.h
+ * HAVE_RE_COMP: BSD re_comp()
+ * HAVE_REGCMP: System V regcmp()
+ * HAVE_V8_REGCOMP: Henry Spencer V8 regcomp() and regexp.h
+ * NO_REGEX: pattern matching is supported, but without metacharacters.
+ */
+/* #undef HAVE_POSIX_REGCOMP */
+/* #undef HAVE_RE_COMP */
+/* #undef HAVE_REGCMP */
+#define HAVE_V8_REGCOMP 1
+/* #undef NO_REGEX */
+#define HAVE_REGEXEC2 1
+
+/* Define HAVE_VOID if your compiler supports the "void" type. */
+#define HAVE_VOID 1
+
+/* Define HAVE_CONST if your compiler supports the "const" modifier. */
+#define HAVE_CONST 1
+
+/* Define HAVE_TIME_T if your system supports the "time_t" type. */
+#define HAVE_TIME_T 1
+
+/* Define HAVE_STRERROR if you have the strerror() function. */
+#define HAVE_STRERROR 1
+
+/* Define HAVE_FILENO if you have the fileno() macro. */
+#define HAVE_FILENO 1
+
+/* Define HAVE_ERRNO if you have the errno variable */
+/* Define MUST_DEFINE_ERRNO if you have errno but it is not define
+ * in errno.h */
+#define HAVE_ERRNO 1
+/* #undef MUST_DEFINE_ERRNO */
+
+/* Define HAVE_SYS_ERRLIST if you have the sys_errlist[] variable */
+#define HAVE_SYS_ERRLIST 1
+
+/* Define HAVE_OSPEED if your termcap library has the ospeed variable */
+#define HAVE_OSPEED 1
+/* Define MUST_DEFINE_OSPEED if you have ospeed but it is not defined
+ * in termcap.h. */
+#define MUST_DEFINE_OSPEED 0
+
+/* Define HAVE_LOCALE if you have locale.h and setlocale. */
+#define HAVE_LOCALE 1
+
+/* Define HAVE_TERMIOS_FUNCS if you have tcgetattr/tcsetattr */
+#define HAVE_TERMIOS_FUNCS 1
+
+/* Define HAVE_UPPER_LOWER if you have isupper, islower, toupper, tolower */
+#define HAVE_UPPER_LOWER 1
+
+/* Define if you have the _setjmp function. */
+#define HAVE__SETJMP 0
+
+/* Define if you have the memcpy function. */
+#define HAVE_MEMCPY 1
+
+/* Define if you have the popen function. */
+#define HAVE_POPEN 1
+
+/* Define if you have the sigsetmask function. */
+#define HAVE_SIGSETMASK 0
+
+/* Define if you have the sigprocmask function. */
+#define HAVE_SIGPROCMASK 1
+
+/* Define if you have the sigset_t type and sigemptyset macro */
+#define HAVE_SIGSET_T 1
+#define HAVE_SIGEMPTYSET 1
+
+/* Define if you have the stat function. */
+#define HAVE_STAT 1
+
+/* Define if you have the strchr function. */
+#define HAVE_STRCHR 1
+
+/* Define if you have the strstr function. */
+#define HAVE_STRSTR 1
+
+/* Define if you have the system function. */
+#define HAVE_SYSTEM 1
+
+/* Define if you have the snprintf function. */
+#define HAVE_SNPRINTF 0
+
+/* Define if you have the <ctype.h> header file. */
+#define HAVE_CTYPE_H 1
+
+/* Define if you have the <wctype.h> header file. */
+#define HAVE_WCTYPE_H 0
+
+/* Define if you have the <errno.h> header file. */
+#define HAVE_ERRNO_H 1
+
+/* Define if you have the <fcntl.h> header file. */
+#define HAVE_FCNTL_H 1
+
+/* Define if you have the <limits.h> header file. */
+#define HAVE_LIMITS_H 1
+
+/* Define if you have the <stdio.h> header file. */
+#define HAVE_STDIO_H 1
+
+/* Define if you have the <stdlib> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define if you have the <sys/ioctl.h> header file. */
+#define HAVE_SYS_IOCTL_H 1
+
+/* Define if you have the <sys/ptem.h> header file. */
+#define HAVE_SYS_PTEM_H 0
+
+/* Define if you have the <sys/stream.h> header file. */
+#define HAVE_SYS_STREAM_H 0
+
+/* Define if you have the <termcap.h> header file. */
+#define HAVE_TERMCAP_H 1
+
+/* Define if you have the <termio.h> header file. */
+#define HAVE_TERMIO_H 1
+
+/* Define if you have the <termios.h> header file. */
+#define HAVE_TERMIOS_H 1
+
+/* Define if you have the <time.h> header file. */
+#define HAVE_TIME_H 1
+
+/* Define if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 1
+
+/* Define if you have the <values.h> header file. */
+#define HAVE_VALUES_H 0
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/* OS/9 definition file for less. */
+/*
+ * This file has 2 sections:
+ * User preferences.
+ * Settings always true for OS-9 systems.
+ */
+\f
+/* User preferences. */
+
+/*
+ * SECURE is 1 if you wish to disable a bunch of features in order to
+ * be safe to run by unprivileged users.
+ */
+#define SECURE 0
+
+/*
+ * SHELL_ESCAPE is 1 if you wish to allow shell escapes.
+ * (This is possible only if your system supplies the system() function.)
+ */
+#define SHELL_ESCAPE (!SECURE)
+
+/*
+ * EXAMINE is 1 if you wish to allow examining files by name from within less.
+ */
+#define EXAMINE (!SECURE)
+
+/*
+ * TAB_COMPLETE_FILENAME is 1 if you wish to allow the TAB key
+ * to complete filenames at prompts.
+ */
+#define TAB_COMPLETE_FILENAME 1
+
+/*
+ * CMD_HISTORY is 1 if you wish to allow keys to cycle through
+ * previous commands at prompts.
+ */
+#define CMD_HISTORY 1
+
+/*
+ * HILITE_SEARCH is 1 if you wish to have search targets to be
+ * displayed in standout mode.
+ */
+#define HILITE_SEARCH 1
+
+/*
+ * EDITOR is 1 if you wish to allow editor invocation (the "v" command).
+ * (This is possible only if your system supplies the system() function.)
+ * EDIT_PGM is the name of the (default) editor to be invoked.
+ */
+#define EDITOR (!SECURE)
+#define EDIT_PGM "umacs"
+
+/*
+ * TAGS is 1 if you wish to support tag files.
+ */
+#define TAGS (!SECURE)
+
+/*
+ * USERFILE is 1 if you wish to allow a .less file to specify
+ * user-defined key bindings.
+ */
+#define USERFILE (!SECURE)
+
+/*
+ * GLOB is 1 if you wish to have shell metacharacters expanded in filenames.
+ * This will generally work if your system provides the "popen" function
+ * and the "echo" shell command.
+ */
+#define GLOB (!SECURE)
+
+/*
+ * PIPEC is 1 if you wish to have the "|" command
+ * which allows the user to pipe data into a shell command.
+ */
+#define PIPEC (!SECURE)
+
+/*
+ * LOGFILE is 1 if you wish to allow the -l option (to create log files).
+ */
+#define LOGFILE (!SECURE)
+
+/*
+ * GNU_OPTIONS is 1 if you wish to support the GNU-style command
+ * line options --help and --version.
+ */
+#define GNU_OPTIONS 1
+
+/*
+ * ONLY_RETURN is 1 if you want RETURN to be the only input which
+ * will continue past an error message.
+ * Otherwise, any key will continue past an error message.
+ */
+#define ONLY_RETURN 0
+
+/*
+ * LESSKEYFILE is the filename of the default lesskey output file
+ * (in the HOME directory).
+ * LESSKEYFILE_SYS is the filename of the system-wide lesskey output file.
+ * DEF_LESSKEYINFILE is the filename of the default lesskey input
+ * (in the HOME directory).
+ * LESSHISTFILE is the filename of the history file
+ * (in the HOME directory).
+ */
+#define LESSKEYFILE ".less"
+#define LESSKEYFILE_SYS "/.sysless"
+#define DEF_LESSKEYINFILE ".lesskey"
+#define LESSHISTFILE ".lesshst"
+
+\f
+/* Settings always true for OS-9. */
+
+/* This is not needed; it is defined by the compiler. */
+/* #define _OSK 1 */
+#define OS2 0
+#define MSDOS_COMPILER 0
+
+/*
+ * Pathname separator character.
+ */
+#define PATHNAME_SEP "/"
+
+/*
+ * HAVE_SYS_TYPES_H is 1 if your system has <sys/types.h>.
+ */
+#define HAVE_SYS_TYPES_H 0
+
+/*
+ * Define if you have the <sgstat.h> header file.
+ */
+#define HAVE_SGSTAT_H 1
+
+/*
+ * HAVE_PERROR is 1 if your system has the perror() call.
+ * (Actually, if it has sys_errlist, sys_nerr and errno.)
+ */
+#if _OSK_MWC32
+#define HAVE_PERROR 0
+#else
+#define HAVE_PERROR 1
+#endif
+
+/*
+ * HAVE_TIME is 1 if your system has the time() call.
+ */
+#define HAVE_TIME 1
+
+/*
+ * HAVE_SHELL is 1 if your system supports a SHELL command interpreter.
+ */
+#define HAVE_SHELL 0
+
+/*
+ * Default shell metacharacters and meta-escape character.
+ */
+#define DEF_METACHARS "; \t\n'\"()<>|&^`#\\"
+#define DEF_METAESCAPE "\\"
+
+/*
+ * HAVE_DUP is 1 if your system has the dup() call.
+ */
+#define HAVE_DUP 0
+
+/*
+ * Sizes of various buffers.
+ */
+#if 0 /* old sizes for small memory machines
+#define CMDBUF_SIZE 512 /* Buffer for multichar commands */
+#define UNGOT_SIZE 100 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 200 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 512 /* Max size of line in tags file */
+#define TABSTOP_MAX 32 /* Max number of custom tab stops */
+#else /* more reasonable sizes for modern machines */
+#define CMDBUF_SIZE 2048 /* Buffer for multichar commands */
+#define UNGOT_SIZE 200 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Initial max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 2048 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 1024 /* Max size of line in tags file */
+#define TABSTOP_MAX 128 /* Max number of custom tab stops */
+#endif
+
+/* Define to `long' if <sys/types.h> doesn't define. */
+#define off_t long
+
+/* Define if you need to in order for stat and other things to work. */
+#define _POSIX_SOURCE 0
+
+/* Define as the return type of signal handlers (int or void). */
+#if _OSK_MWC32
+#define RETSIGTYPE int
+#else
+#define RETSIGTYPE void
+#endif
+
+
+/*
+ * Regular expression library.
+ * Define exactly one of the following to be 1:
+ * HAVE_POSIX_REGCOMP: POSIX regcomp() and regex.h
+ * HAVE_RE_COMP: BSD re_comp()
+ * HAVE_REGCMP: System V regcmp()
+ * HAVE_V8_REGCOMP: Henry Spencer V8 regcomp() and regexp.h
+ * NO_REGEX: pattern matching is supported, but without metacharacters.
+ */
+#define HAVE_POSIX_REGCOMP 0
+#define HAVE_RE_COMP 0
+#define HAVE_REGCMP 0
+#define HAVE_V8_REGCOMP 1
+#define NO_REGEX 0
+#define HAVE_REGEXEC2 1
+
+/* Define HAVE_VOID if your compiler supports the "void" type. */
+#define HAVE_VOID 1
+
+/* Define HAVE_CONST if your compiler supports the "const" modifier. */
+#define HAVE_CONST 0
+
+/* Define HAVE_TIME_T if your system supports the "time_t" type. */
+#define HAVE_TIME_T 1
+
+/* Define HAVE_STRERROR if you have the strerror() function. */
+#define HAVE_STRERROR 0
+
+/* Define HAVE_FILENO if you have the fileno() macro. */
+#define HAVE_FILENO 1
+
+/* Define HAVE_ERRNO if you have the errno variable */
+/* Define MUST_DEFINE_ERRNO if you have errno but it is not define
+ * in errno.h */
+#define HAVE_ERRNO 1
+#define MUST_DEFINE_ERRNO 0
+
+/* Define HAVE_SYS_ERRLIST if you have the sys_errlist[] variable */
+#define HAVE_SYS_ERRLIST 0
+
+/* Define HAVE_OSPEED if your termcap library has the ospeed variable */
+/* Define MUST_DEFINE_OSPEED if you have ospeed but it is not defined
+ * in termcap.h. */
+#define HAVE_OSPEED 0
+#define MUST_DEFINE_OSPEED 0
+
+/* Define HAVE_LOCALE if you have locale.h and setlocale. */
+#define HAVE_LOCALE 0
+
+/* Define HAVE_TERMIOS_FUNCS if you have tcgetattr/tcsetattr */
+#define HAVE_TERMIOS_FUNCS 0
+
+/* Define HAVE_UPPER_LOWER if you have isupper, islower, toupper, tolower */
+#define HAVE_UPPER_LOWER 1
+
+/* Define if you have the _setjmp function. */
+#define HAVE__SETJMP 1
+
+/* Define if you have the memcpy function. */
+#define HAVE_MEMCPY 1
+
+/* Define if you have the popen function. */
+#define HAVE_POPEN 1
+
+/* Define if you have the sigsetmask function. */
+#define HAVE_SIGSETMASK 0
+
+/* Define if you have the sigprocmask function. */
+#define HAVE_SIGPROCMASK 0
+
+/* Define if you have the sigset_t type and sigemptyset macro */
+#define HAVE_SIGSET_T 0
+#define HAVE_SIGEMPTYSET 0
+
+/* Define if you have the stat function. */
+#define HAVE_STAT 0
+
+/* Define if you have the strchr function. */
+#define HAVE_STRCHR 0
+
+/* Define if you have the system function. */
+#define HAVE_SYSTEM 1
+
+/* Define if you have the snprintf function. */
+#define HAVE_SNPRINTF 0
+
+/* Define if you have the <ctype.h> header file. */
+#define HAVE_CTYPE_H 1
+
+/* Define if you have the <wctype.h> header file. */
+#define HAVE_WCTYPE_H 0
+
+/* Define if you have the <errno.h> header file. */
+#define HAVE_ERRNO_H 1
+
+/* Define if you have the <fcntl.h> header file. */
+#define HAVE_FCNTL_H 0
+
+/* Define if you have the <limits.h> header file. */
+#define HAVE_LIMITS_H 0
+
+/* Define if you have the <stdio.h> header file. */
+#define HAVE_STDIO_H 1
+
+/* Define if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define if you have the <stdlib> header file. */
+#if _OSK_MWC32
+#define HAVE_STDLIB_H 0
+#else
+#define HAVE_STDLIB_H 1
+#endif
+
+/* Define if you have the <sys/ioctl.h> header file. */
+#define HAVE_SYS_IOCTL_H 0
+
+/* Define if you have the <sys/ptem.h> header file. */
+#define HAVE_SYS_PTEM_H 0
+
+/* Define if you have the <sys/stream.h> header file. */
+#define HAVE_SYS_STREAM_H 0
+
+/* Define if you have the <termcap.h> header file. */
+#define HAVE_TERMCAP_H 1
+
+/* Define if you have the <termio.h> header file. */
+#define HAVE_TERMIO_H 0
+
+/* Define if you have the <termios.h> header file. */
+#define HAVE_TERMIOS_H 0
+
+/* Define if you have the <time.h> header file. */
+#define HAVE_TIME_H 1
+
+/* Define if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 0
+
+/* Define if you have the <values.h> header file. */
+#define HAVE_VALUES_H 0
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/* Windows definition file for less. */
+/*
+ * This file has 2 sections:
+ * User preferences.
+ * Settings always true for Windows systems.
+ */
+
+\f
+/* User preferences. */
+
+/*
+ * SECURE is 1 if you wish to disable a bunch of features in order to
+ * be safe to run by unprivileged users.
+ */
+#define SECURE 0
+
+/*
+ * SHELL_ESCAPE is 1 if you wish to allow shell escapes.
+ * (This is possible only if your system supplies the system() function.)
+ */
+#define SHELL_ESCAPE (!SECURE)
+
+/*
+ * EXAMINE is 1 if you wish to allow examining files by name from within less.
+ */
+#define EXAMINE (!SECURE)
+
+/*
+ * TAB_COMPLETE_FILENAME is 1 if you wish to allow the TAB key
+ * to complete filenames at prompts.
+ */
+#define TAB_COMPLETE_FILENAME (!SECURE)
+
+/*
+ * CMD_HISTORY is 1 if you wish to allow keys to cycle through
+ * previous commands at prompts.
+ */
+#define CMD_HISTORY 1
+
+/*
+ * HILITE_SEARCH is 1 if you wish to have search targets to be
+ * displayed in standout mode.
+ */
+#define HILITE_SEARCH 1
+
+/*
+ * EDITOR is 1 if you wish to allow editor invocation (the "v" command).
+ * (This is possible only if your system supplies the system() function.)
+ * EDIT_PGM is the name of the (default) editor to be invoked.
+ */
+#define EDITOR (!SECURE)
+#define EDIT_PGM "edit"
+
+/*
+ * TAGS is 1 if you wish to support tag files.
+ */
+#define TAGS (!SECURE)
+
+/*
+ * USERFILE is 1 if you wish to allow a .less file to specify
+ * user-defined key bindings.
+ */
+#define USERFILE (!SECURE)
+
+/*
+ * GLOB is 1 if you wish to have shell metacharacters expanded in filenames.
+ * This will generally work if your system provides the "popen" function
+ * and the "echo" shell command.
+ */
+#define GLOB 0
+
+/*
+ * PIPEC is 1 if you wish to have the "|" command
+ * which allows the user to pipe data into a shell command.
+ */
+#define PIPEC 1
+
+/*
+ * LOGFILE is 1 if you wish to allow the -l option (to create log files).
+ */
+#define LOGFILE (!SECURE)
+
+/*
+ * GNU_OPTIONS is 1 if you wish to support the GNU-style command
+ * line options --help and --version.
+ */
+#define GNU_OPTIONS 1
+
+/*
+ * ONLY_RETURN is 1 if you want RETURN to be the only input which
+ * will continue past an error message.
+ * Otherwise, any key will continue past an error message.
+ */
+#define ONLY_RETURN 0
+
+/*
+ * LESSKEYFILE is the filename of the default lesskey output file
+ * (in the HOME directory).
+ * LESSKEYFILE_SYS is the filename of the system-wide lesskey output file.
+ * DEF_LESSKEYINFILE is the filename of the default lesskey input
+ * (in the HOME directory).
+ * LESSHISTFILE is the filename of the history file
+ * (in the HOME directory).
+ */
+#define LESSKEYFILE "_less"
+#define LESSKEYFILE_SYS "c:\\_sysless"
+#define DEF_LESSKEYINFILE "_lesskey"
+#define LESSHISTFILE "_lesshst"
+
+\f
+/* Settings always true for Windows systems. */
+
+#define MSDOS_COMPILER WIN32C
+
+/*
+ * Pathname separator character.
+ */
+#define PATHNAME_SEP "\\"
+
+/*
+ * HAVE_SYS_TYPES_H is 1 if your system has <sys/types.h>.
+ */
+#define HAVE_SYS_TYPES_H 1
+
+/*
+ * Define if you have the <sgstat.h> header file.
+ */
+#define HAVE_SGSTAT_H 0
+
+/*
+ * HAVE_PERROR is 1 if your system has the perror() call.
+ * (Actually, if it has sys_errlist, sys_nerr and errno.)
+ */
+#define HAVE_PERROR 1
+
+/*
+ * HAVE_TIME is 1 if your system has the time() call.
+ */
+#define HAVE_TIME 1
+
+/*
+ * HAVE_SHELL is 1 if your system supports a SHELL command interpreter.
+ */
+#define HAVE_SHELL 0
+
+/*
+ * Default shell metacharacters and meta-escape character.
+ */
+#define DEF_METACHARS "; *?\t\n'\"()<>|&"
+#define DEF_METAESCAPE ""
+
+/*
+ * HAVE_DUP is 1 if your system has the dup() call.
+ */
+#define HAVE_DUP 1
+
+/*
+ * Sizes of various buffers.
+ */
+#if 0 /* old sizes for small memory machines
+#define CMDBUF_SIZE 512 /* Buffer for multichar commands */
+#define UNGOT_SIZE 100 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 200 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 512 /* Max size of line in tags file */
+#define TABSTOP_MAX 32 /* Max number of custom tab stops */
+#else /* more reasonable sizes for modern machines */
+#define CMDBUF_SIZE 2048 /* Buffer for multichar commands */
+#define UNGOT_SIZE 200 /* Max chars to unget() */
+#define LINEBUF_SIZE 1024 /* Initial max size of line in input file */
+#define OUTBUF_SIZE 1024 /* Output buffer */
+#define PROMPT_SIZE 2048 /* Max size of prompt string */
+#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */
+#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */
+#define TAGLINE_SIZE 1024 /* Max size of line in tags file */
+#define TABSTOP_MAX 128 /* Max number of custom tab stops */
+#endif
+
+/* Define to `long' if <sys/types.h> doesn't define. */
+/* #define off_t long */
+
+/* Define if you need to in order for stat and other things to work. */
+/* #undef _POSIX_SOURCE */
+
+/* Define as the return type of signal handlers (int or void). */
+#define RETSIGTYPE void
+
+
+/*
+ * Regular expression library.
+ * Define exactly one of the following to be 1:
+ * HAVE_POSIX_REGCOMP: POSIX regcomp() and regex.h
+ * HAVE_RE_COMP: BSD re_comp()
+ * HAVE_REGCMP: System V regcmp()
+ * HAVE_V8_REGCOMP: Henry Spencer V8 regcomp() and regexp.h
+ * NO_REGEX: pattern matching is supported, but without metacharacters.
+ */
+/* #undef HAVE_POSIX_REGCOMP */
+/* #undef HAVE_RE_COMP */
+/* #undef HAVE_REGCMP */
+#define HAVE_V8_REGCOMP 1
+/* #undef NO_REGEX */
+#define HAVE_REGEXEC2 1
+
+/* Define HAVE_VOID if your compiler supports the "void" type. */
+#define HAVE_VOID 1
+
+/* Define HAVE_CONST if your compiler supports the "const" modifier. */
+#define HAVE_CONST 1
+
+/* Define HAVE_TIME_T if your system supports the "time_t" type. */
+#define HAVE_TIME_T 1
+
+/* Define HAVE_STRERROR if you have the strerror() function. */
+#define HAVE_STRERROR 1
+
+/* Define HAVE_FILENO if you have the fileno() macro. */
+#define HAVE_FILENO 1
+
+/* Define HAVE_ERRNO if you have the errno variable */
+/* Define MUST_DEFINE_ERRNO if you have errno but it is not define
+ * in errno.h */
+#define HAVE_ERRNO 1
+#define MUST_DEFINE_ERRNO 1
+
+/* Define HAVE_SYS_ERRLIST if you have the sys_errlist[] variable */
+#define HAVE_SYS_ERRLIST 1
+
+/* Define HAVE_OSPEED if your termcap library has the ospeed variable */
+#define HAVE_OSPEED 0
+/* Define MUST_DEFINE_OSPEED if you have ospeed but it is not defined
+ * in termcap.h. */
+#define MUST_DEFINE_OSPEED 0
+
+/* Define HAVE_LOCALE if you have locale.h and setlocale. */
+#define HAVE_LOCALE 0
+
+/* Define HAVE_TERMIOS_FUNCS if you have tcgetattr/tcsetattr */
+#define HAVE_TERMIOS_FUNCS 0
+
+/* Define HAVE_UPPER_LOWER if you have isupper, islower, toupper, tolower */
+#define HAVE_UPPER_LOWER 1
+
+/* Define if you have the _setjmp function. */
+#define HAVE__SETJMP 1
+
+/* Define if you have the memcpy function. */
+#define HAVE_MEMCPY 1
+
+/* Define if you have the popen function. */
+#define HAVE_POPEN 1
+
+/* Define if you have the sigsetmask function. */
+#define HAVE_SIGSETMASK 0
+
+/* Define if you have the sigprocmask function. */
+#define HAVE_SIGPROCMASK 0
+
+/* Define if you have the sigset_t type and sigemptyset macro */
+#define HAVE_SIGSET_T 0
+#define HAVE_SIGEMPTYSET 0
+
+/* Define if you have the stat function. */
+#define HAVE_STAT 1
+
+/* Define if you have the strchr function. */
+#define HAVE_STRCHR 1
+
+/* Define if you have the system function. */
+#define HAVE_SYSTEM 1
+
+/* Define if you have the snprintf function. */
+#define HAVE_SNPRINTF 1
+
+/* Define if you have the <ctype.h> header file. */
+#define HAVE_CTYPE_H 1
+
+/* Define if you have the <wctype.h> header file. */
+#define HAVE_WCTYPE_H 1
+
+/* Define if you have the <errno.h> header file. */
+#define HAVE_ERRNO_H 1
+
+/* Define if you have the <fcntl.h> header file. */
+#define HAVE_FCNTL_H 1
+
+/* Define HAVE_FLOAT if your compiler supports the "double" type. */
+#define HAVE_FLOAT 1
+
+/* Define if you have the <limits.h> header file. */
+#define HAVE_LIMITS_H 1
+
+/* Define if you have the <stdio.h> header file. */
+#define HAVE_STDIO_H 1
+
+/* Define if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define if you have the <stdlib> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define if you have the <sys/ioctl.h> header file. */
+#define HAVE_SYS_IOCTL_H 0
+
+/* Define if you have the <sys/ptem.h> header file. */
+#define HAVE_SYS_PTEM_H 0
+
+/* Define if you have the <sys/stream.h> header file. */
+#define HAVE_SYS_STREAM_H 0
+
+/* Define if you have the <termcap.h> header file. */
+#define HAVE_TERMCAP_H 0
+
+/* Define if you have the <termio.h> header file. */
+#define HAVE_TERMIO_H 0
+
+/* Define if you have the <termios.h> header file. */
+#define HAVE_TERMIOS_H 0
+
+/* Define if you have the <time.h> header file. */
+#define HAVE_TIME_H 1
+
+/* Define if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 0
+
+/* Define if you have the <values.h> header file. */
+#ifdef _MSC_VER
+#define HAVE_VALUES_H 0
+#else
+#define HAVE_VALUES_H 1
+#endif
+
+#define popen _popen
+#define pclose _pclose
+#if !defined(_MSC_VER) || (_MSC_VER < 1900)
+#define snprintf _snprintf
+#endif
+
+#pragma warning(disable:4996)
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+#include "less.h"
+#if HAVE_STAT
+#include <sys/stat.h>
+#endif
+
+public int fd0 = 0;
+
+extern int new_file;
+extern int errmsgs;
+extern int cbufs;
+extern char *every_first_cmd;
+extern int any_display;
+extern int force_open;
+extern int is_tty;
+extern int sigs;
+extern IFILE curr_ifile;
+extern IFILE old_ifile;
+extern struct scrpos initial_scrpos;
+extern void constant *ml_examine;
+#if SPACES_IN_FILENAMES
+extern char openquote;
+extern char closequote;
+#endif
+
+#if LOGFILE
+extern int logfile;
+extern int force_logfile;
+extern char *namelogfile;
+#endif
+
+#if HAVE_STAT_INO
+public dev_t curr_dev;
+public ino_t curr_ino;
+#endif
+
+char *curr_altfilename = NULL;
+static void *curr_altpipe;
+
+
+/*
+ * Textlist functions deal with a list of words separated by spaces.
+ * init_textlist sets up a textlist structure.
+ * forw_textlist uses that structure to iterate thru the list of
+ * words, returning each one as a standard null-terminated string.
+ * back_textlist does the same, but runs thru the list backwards.
+ */
+ public void
+init_textlist(tlist, str)
+ struct textlist *tlist;
+ char *str;
+{
+ char *s;
+#if SPACES_IN_FILENAMES
+ int meta_quoted = 0;
+ int delim_quoted = 0;
+ char *esc = get_meta_escape();
+ int esclen = (int) strlen(esc);
+#endif
+
+ tlist->string = skipsp(str);
+ tlist->endstring = tlist->string + strlen(tlist->string);
+ for (s = str; s < tlist->endstring; s++)
+ {
+#if SPACES_IN_FILENAMES
+ if (meta_quoted)
+ {
+ meta_quoted = 0;
+ } else if (esclen > 0 && s + esclen < tlist->endstring &&
+ strncmp(s, esc, esclen) == 0)
+ {
+ meta_quoted = 1;
+ s += esclen - 1;
+ } else if (delim_quoted)
+ {
+ if (*s == closequote)
+ delim_quoted = 0;
+ } else /* (!delim_quoted) */
+ {
+ if (*s == openquote)
+ delim_quoted = 1;
+ else if (*s == ' ')
+ *s = '\0';
+ }
+#else
+ if (*s == ' ')
+ *s = '\0';
+#endif
+ }
+}
+
+ public char *
+forw_textlist(tlist, prev)
+ struct textlist *tlist;
+ char *prev;
+{
+ char *s;
+
+ /*
+ * prev == NULL means return the first word in the list.
+ * Otherwise, return the word after "prev".
+ */
+ if (prev == NULL)
+ s = tlist->string;
+ else
+ s = prev + strlen(prev);
+ if (s >= tlist->endstring)
+ return (NULL);
+ while (*s == '\0')
+ s++;
+ if (s >= tlist->endstring)
+ return (NULL);
+ return (s);
+}
+
+ public char *
+back_textlist(tlist, prev)
+ struct textlist *tlist;
+ char *prev;
+{
+ char *s;
+
+ /*
+ * prev == NULL means return the last word in the list.
+ * Otherwise, return the word before "prev".
+ */
+ if (prev == NULL)
+ s = tlist->endstring;
+ else if (prev <= tlist->string)
+ return (NULL);
+ else
+ s = prev - 1;
+ while (*s == '\0')
+ s--;
+ if (s <= tlist->string)
+ return (NULL);
+ while (s[-1] != '\0' && s > tlist->string)
+ s--;
+ return (s);
+}
+
+/*
+ * Close the current input file.
+ */
+ static void
+close_file()
+{
+ struct scrpos scrpos;
+
+ if (curr_ifile == NULL_IFILE)
+ return;
+
+ /*
+ * Save the current position so that we can return to
+ * the same position if we edit this file again.
+ */
+ get_scrpos(&scrpos);
+ if (scrpos.pos != NULL_POSITION)
+ {
+ store_pos(curr_ifile, &scrpos);
+ lastmark();
+ }
+ /*
+ * Close the file descriptor, unless it is a pipe.
+ */
+ ch_close();
+ /*
+ * If we opened a file using an alternate name,
+ * do special stuff to close it.
+ */
+ if (curr_altfilename != NULL)
+ {
+ close_altfile(curr_altfilename, get_filename(curr_ifile),
+ curr_altpipe);
+ free(curr_altfilename);
+ curr_altfilename = NULL;
+ }
+ curr_ifile = NULL_IFILE;
+#if HAVE_STAT_INO
+ curr_ino = curr_dev = 0;
+#endif
+}
+
+/*
+ * Edit a new file (given its name).
+ * Filename == "-" means standard input.
+ * Filename == NULL means just close the current file.
+ */
+ public int
+edit(filename)
+ char *filename;
+{
+ if (filename == NULL)
+ return (edit_ifile(NULL_IFILE));
+ return (edit_ifile(get_ifile(filename, curr_ifile)));
+}
+
+/*
+ * Edit a new file (given its IFILE).
+ * ifile == NULL means just close the current file.
+ */
+ public int
+edit_ifile(ifile)
+ IFILE ifile;
+{
+ int f;
+ int answer;
+ int no_display;
+ int chflags;
+ char *filename;
+ char *open_filename;
+ char *qopen_filename;
+ char *alt_filename;
+ void *alt_pipe;
+ IFILE was_curr_ifile;
+ PARG parg;
+
+ if (ifile == curr_ifile)
+ {
+ /*
+ * Already have the correct file open.
+ */
+ return (0);
+ }
+
+ /*
+ * We must close the currently open file now.
+ * This is necessary to make the open_altfile/close_altfile pairs
+ * nest properly (or rather to avoid nesting at all).
+ * {{ Some stupid implementations of popen() mess up if you do:
+ * fA = popen("A"); fB = popen("B"); pclose(fA); pclose(fB); }}
+ */
+#if LOGFILE
+ end_logfile();
+#endif
+ was_curr_ifile = save_curr_ifile();
+ if (curr_ifile != NULL_IFILE)
+ {
+ chflags = ch_getflags();
+ close_file();
+ if ((chflags & CH_HELPFILE) && held_ifile(was_curr_ifile) <= 1)
+ {
+ /*
+ * Don't keep the help file in the ifile list.
+ */
+ del_ifile(was_curr_ifile);
+ was_curr_ifile = old_ifile;
+ }
+ }
+
+ if (ifile == NULL_IFILE)
+ {
+ /*
+ * No new file to open.
+ * (Don't set old_ifile, because if you call edit_ifile(NULL),
+ * you're supposed to have saved curr_ifile yourself,
+ * and you'll restore it if necessary.)
+ */
+ unsave_ifile(was_curr_ifile);
+ return (0);
+ }
+
+ filename = save(get_filename(ifile));
+ /*
+ * See if LESSOPEN specifies an "alternate" file to open.
+ */
+ alt_pipe = NULL;
+ alt_filename = open_altfile(filename, &f, &alt_pipe);
+ open_filename = (alt_filename != NULL) ? alt_filename : filename;
+ qopen_filename = shell_unquote(open_filename);
+
+ chflags = 0;
+ if (alt_pipe != NULL)
+ {
+ /*
+ * The alternate "file" is actually a pipe.
+ * f has already been set to the file descriptor of the pipe
+ * in the call to open_altfile above.
+ * Keep the file descriptor open because it was opened
+ * via popen(), and pclose() wants to close it.
+ */
+ chflags |= CH_POPENED;
+ } else if (strcmp(open_filename, "-") == 0)
+ {
+ /*
+ * Use standard input.
+ * Keep the file descriptor open because we can't reopen it.
+ */
+ f = fd0;
+ chflags |= CH_KEEPOPEN;
+ /*
+ * Must switch stdin to BINARY mode.
+ */
+ SET_BINARY(f);
+#if MSDOS_COMPILER==DJGPPC
+ /*
+ * Setting stdin to binary by default causes
+ * Ctrl-C to not raise SIGINT. We must undo
+ * that side-effect.
+ */
+ __djgpp_set_ctrl_c(1);
+#endif
+ } else if (strcmp(open_filename, FAKE_EMPTYFILE) == 0)
+ {
+ f = -1;
+ chflags |= CH_NODATA;
+ } else if (strcmp(open_filename, FAKE_HELPFILE) == 0)
+ {
+ f = -1;
+ chflags |= CH_HELPFILE;
+ } else if ((parg.p_string = bad_file(open_filename)) != NULL)
+ {
+ /*
+ * It looks like a bad file. Don't try to open it.
+ */
+ error("%s", &parg);
+ free(parg.p_string);
+ err1:
+ if (alt_filename != NULL)
+ {
+ close_altfile(alt_filename, filename, alt_pipe);
+ free(alt_filename);
+ }
+ del_ifile(ifile);
+ free(qopen_filename);
+ free(filename);
+ /*
+ * Re-open the current file.
+ */
+ if (was_curr_ifile == ifile)
+ {
+ /*
+ * Whoops. The "current" ifile is the one we just deleted.
+ * Just give up.
+ */
+ quit(QUIT_ERROR);
+ }
+ reedit_ifile(was_curr_ifile);
+ return (1);
+ } else if ((f = open(qopen_filename, OPEN_READ)) < 0)
+ {
+ /*
+ * Got an error trying to open it.
+ */
+ parg.p_string = errno_message(filename);
+ error("%s", &parg);
+ free(parg.p_string);
+ goto err1;
+ } else
+ {
+ chflags |= CH_CANSEEK;
+ if (!force_open && !opened(ifile) && bin_file(f))
+ {
+ /*
+ * Looks like a binary file.
+ * Ask user if we should proceed.
+ */
+ parg.p_string = filename;
+ answer = query("\"%s\" may be a binary file. See it anyway? ",
+ &parg);
+ if (answer != 'y' && answer != 'Y')
+ {
+ close(f);
+ goto err1;
+ }
+ }
+ }
+
+ /*
+ * Get the new ifile.
+ * Get the saved position for the file.
+ */
+ if (was_curr_ifile != NULL_IFILE)
+ {
+ old_ifile = was_curr_ifile;
+ unsave_ifile(was_curr_ifile);
+ }
+ curr_ifile = ifile;
+ curr_altfilename = alt_filename;
+ curr_altpipe = alt_pipe;
+ set_open(curr_ifile); /* File has been opened */
+ get_pos(curr_ifile, &initial_scrpos);
+ new_file = TRUE;
+ ch_init(f, chflags);
+
+ if (!(chflags & CH_HELPFILE))
+ {
+#if LOGFILE
+ if (namelogfile != NULL && is_tty)
+ use_logfile(namelogfile);
+#endif
+#if HAVE_STAT_INO
+ /* Remember the i-number and device of the opened file. */
+ {
+ struct stat statbuf;
+ int r = stat(qopen_filename, &statbuf);
+ if (r == 0)
+ {
+ curr_ino = statbuf.st_ino;
+ curr_dev = statbuf.st_dev;
+ }
+ }
+#endif
+ if (every_first_cmd != NULL)
+ {
+ ungetcc(CHAR_END_COMMAND);
+ ungetsc(every_first_cmd);
+ }
+ }
+
+ free(qopen_filename);
+ no_display = !any_display;
+ flush();
+ any_display = TRUE;
+
+ if (is_tty)
+ {
+ /*
+ * Output is to a real tty.
+ */
+
+ /*
+ * Indicate there is nothing displayed yet.
+ */
+ pos_clear();
+ clr_linenum();
+#if HILITE_SEARCH
+ clr_hilite();
+#endif
+ if (strcmp(filename, FAKE_HELPFILE) && strcmp(filename, FAKE_EMPTYFILE))
+ cmd_addhist(ml_examine, filename, 1);
+ if (no_display && errmsgs > 0)
+ {
+ /*
+ * We displayed some messages on error output
+ * (file descriptor 2; see error() function).
+ * Before erasing the screen contents,
+ * display the file name and wait for a keystroke.
+ */
+ parg.p_string = filename;
+ error("%s", &parg);
+ }
+ }
+ free(filename);
+ return (0);
+}
+
+/*
+ * Edit a space-separated list of files.
+ * For each filename in the list, enter it into the ifile list.
+ * Then edit the first one.
+ */
+ public int
+edit_list(filelist)
+ char *filelist;
+{
+ IFILE save_ifile;
+ char *good_filename;
+ char *filename;
+ char *gfilelist;
+ char *gfilename;
+ struct textlist tl_files;
+ struct textlist tl_gfiles;
+
+ save_ifile = save_curr_ifile();
+ good_filename = NULL;
+
+ /*
+ * Run thru each filename in the list.
+ * Try to glob the filename.
+ * If it doesn't expand, just try to open the filename.
+ * If it does expand, try to open each name in that list.
+ */
+ init_textlist(&tl_files, filelist);
+ filename = NULL;
+ while ((filename = forw_textlist(&tl_files, filename)) != NULL)
+ {
+ gfilelist = lglob(filename);
+ init_textlist(&tl_gfiles, gfilelist);
+ gfilename = NULL;
+ while ((gfilename = forw_textlist(&tl_gfiles, gfilename)) != NULL)
+ {
+ if (edit(gfilename) == 0 && good_filename == NULL)
+ good_filename = get_filename(curr_ifile);
+ }
+ free(gfilelist);
+ }
+ /*
+ * Edit the first valid filename in the list.
+ */
+ if (good_filename == NULL)
+ {
+ unsave_ifile(save_ifile);
+ return (1);
+ }
+ if (get_ifile(good_filename, curr_ifile) == curr_ifile)
+ {
+ /*
+ * Trying to edit the current file; don't reopen it.
+ */
+ unsave_ifile(save_ifile);
+ return (0);
+ }
+ reedit_ifile(save_ifile);
+ return (edit(good_filename));
+}
+
+/*
+ * Edit the first file in the command line (ifile) list.
+ */
+ public int
+edit_first()
+{
+ curr_ifile = NULL_IFILE;
+ return (edit_next(1));
+}
+
+/*
+ * Edit the last file in the command line (ifile) list.
+ */
+ public int
+edit_last()
+{
+ curr_ifile = NULL_IFILE;
+ return (edit_prev(1));
+}
+
+
+/*
+ * Edit the n-th next or previous file in the command line (ifile) list.
+ */
+ static int
+edit_istep(h, n, dir)
+ IFILE h;
+ int n;
+ int dir;
+{
+ IFILE next;
+
+ /*
+ * Skip n filenames, then try to edit each filename.
+ */
+ for (;;)
+ {
+ next = (dir > 0) ? next_ifile(h) : prev_ifile(h);
+ if (--n < 0)
+ {
+ if (edit_ifile(h) == 0)
+ break;
+ }
+ if (next == NULL_IFILE)
+ {
+ /*
+ * Reached end of the ifile list.
+ */
+ return (1);
+ }
+ if (ABORT_SIGS())
+ {
+ /*
+ * Interrupt breaks out, if we're in a long
+ * list of files that can't be opened.
+ */
+ return (1);
+ }
+ h = next;
+ }
+ /*
+ * Found a file that we can edit.
+ */
+ return (0);
+}
+
+ static int
+edit_inext(h, n)
+ IFILE h;
+ int n;
+{
+ return (edit_istep(h, n, +1));
+}
+
+ public int
+edit_next(n)
+ int n;
+{
+ return edit_istep(curr_ifile, n, +1);
+}
+
+ static int
+edit_iprev(h, n)
+ IFILE h;
+ int n;
+{
+ return (edit_istep(h, n, -1));
+}
+
+ public int
+edit_prev(n)
+ int n;
+{
+ return edit_istep(curr_ifile, n, -1);
+}
+
+/*
+ * Edit a specific file in the command line (ifile) list.
+ */
+ public int
+edit_index(n)
+ int n;
+{
+ IFILE h;
+
+ h = NULL_IFILE;
+ do
+ {
+ if ((h = next_ifile(h)) == NULL_IFILE)
+ {
+ /*
+ * Reached end of the list without finding it.
+ */
+ return (1);
+ }
+ } while (get_index(h) != n);
+
+ return (edit_ifile(h));
+}
+
+ public IFILE
+save_curr_ifile()
+{
+ if (curr_ifile != NULL_IFILE)
+ hold_ifile(curr_ifile, 1);
+ return (curr_ifile);
+}
+
+ public void
+unsave_ifile(save_ifile)
+ IFILE save_ifile;
+{
+ if (save_ifile != NULL_IFILE)
+ hold_ifile(save_ifile, -1);
+}
+
+/*
+ * Reedit the ifile which was previously open.
+ */
+ public void
+reedit_ifile(save_ifile)
+ IFILE save_ifile;
+{
+ IFILE next;
+ IFILE prev;
+
+ /*
+ * Try to reopen the ifile.
+ * Note that opening it may fail (maybe the file was removed),
+ * in which case the ifile will be deleted from the list.
+ * So save the next and prev ifiles first.
+ */
+ unsave_ifile(save_ifile);
+ next = next_ifile(save_ifile);
+ prev = prev_ifile(save_ifile);
+ if (edit_ifile(save_ifile) == 0)
+ return;
+ /*
+ * If can't reopen it, open the next input file in the list.
+ */
+ if (next != NULL_IFILE && edit_inext(next, 0) == 0)
+ return;
+ /*
+ * If can't open THAT one, open the previous input file in the list.
+ */
+ if (prev != NULL_IFILE && edit_iprev(prev, 0) == 0)
+ return;
+ /*
+ * If can't even open that, we're stuck. Just quit.
+ */
+ quit(QUIT_ERROR);
+}
+
+ public void
+reopen_curr_ifile()
+{
+ IFILE save_ifile = save_curr_ifile();
+ close_file();
+ reedit_ifile(save_ifile);
+}
+
+/*
+ * Edit standard input.
+ */
+ public int
+edit_stdin()
+{
+ if (isatty(fd0))
+ {
+ error("Missing filename (\"less --help\" for help)", NULL_PARG);
+ quit(QUIT_OK);
+ }
+ return (edit("-"));
+}
+
+/*
+ * Copy a file directly to standard output.
+ * Used if standard output is not a tty.
+ */
+ public void
+cat_file()
+{
+ register int c;
+
+ while ((c = ch_forw_get()) != EOI)
+ putchr(c);
+ flush();
+}
+
+#if LOGFILE
+
+/*
+ * If the user asked for a log file and our input file
+ * is standard input, create the log file.
+ * We take care not to blindly overwrite an existing file.
+ */
+ public void
+use_logfile(filename)
+ char *filename;
+{
+ register int exists;
+ register int answer;
+ PARG parg;
+
+ if (ch_getflags() & CH_CANSEEK)
+ /*
+ * Can't currently use a log file on a file that can seek.
+ */
+ return;
+
+ /*
+ * {{ We could use access() here. }}
+ */
+ filename = shell_unquote(filename);
+ exists = open(filename, OPEN_READ);
+ if (exists >= 0)
+ close(exists);
+ exists = (exists >= 0);
+
+ /*
+ * Decide whether to overwrite the log file or append to it.
+ * If it doesn't exist we "overwrite" it.
+ */
+ if (!exists || force_logfile)
+ {
+ /*
+ * Overwrite (or create) the log file.
+ */
+ answer = 'O';
+ } else
+ {
+ /*
+ * Ask user what to do.
+ */
+ parg.p_string = filename;
+ answer = query("Warning: \"%s\" exists; Overwrite, Append or Don't log? ", &parg);
+ }
+
+loop:
+ switch (answer)
+ {
+ case 'O': case 'o':
+ /*
+ * Overwrite: create the file.
+ */
+ logfile = creat(filename, 0644);
+ break;
+ case 'A': case 'a':
+ /*
+ * Append: open the file and seek to the end.
+ */
+ logfile = open(filename, OPEN_APPEND);
+ if (lseek(logfile, (off_t)0, SEEK_END) == BAD_LSEEK)
+ {
+ close(logfile);
+ logfile = -1;
+ }
+ break;
+ case 'D': case 'd':
+ /*
+ * Don't do anything.
+ */
+ free(filename);
+ return;
+ case 'q':
+ quit(QUIT_OK);
+ /*NOTREACHED*/
+ default:
+ /*
+ * Eh?
+ */
+ answer = query("Overwrite, Append, or Don't log? (Type \"O\", \"A\", \"D\" or \"q\") ", NULL_PARG);
+ goto loop;
+ }
+
+ if (logfile < 0)
+ {
+ /*
+ * Error in opening logfile.
+ */
+ parg.p_string = filename;
+ error("Cannot write to \"%s\"", &parg);
+ free(filename);
+ return;
+ }
+ free(filename);
+ SET_BINARY(logfile);
+}
+
+#endif
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines to mess around with filenames (and files).
+ * Much of this is very OS dependent.
+ */
+
+#include "less.h"
+#include "lglob.h"
+#if MSDOS_COMPILER
+#include <dos.h>
+#if MSDOS_COMPILER==WIN32C && !defined(_MSC_VER)
+#include <dir.h>
+#endif
+#if MSDOS_COMPILER==DJGPPC
+#include <glob.h>
+#include <dir.h>
+#define _MAX_PATH PATH_MAX
+#endif
+#endif
+#ifdef _OSK
+#include <rbf.h>
+#ifndef _OSK_MWC32
+#include <modes.h>
+#endif
+#endif
+#if OS2
+#include <signal.h>
+#endif
+
+#if HAVE_STAT
+#include <sys/stat.h>
+#ifndef S_ISDIR
+#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
+#endif
+#ifndef S_ISREG
+#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
+#endif
+#endif
+
+
+extern int force_open;
+extern int secure;
+extern int use_lessopen;
+extern int ctldisp;
+extern int utf_mode;
+extern IFILE curr_ifile;
+extern IFILE old_ifile;
+#if SPACES_IN_FILENAMES
+extern char openquote;
+extern char closequote;
+#endif
+
+/*
+ * Remove quotes around a filename.
+ */
+ public char *
+shell_unquote(str)
+ char *str;
+{
+ char *name;
+ char *p;
+
+ name = p = (char *) ecalloc(strlen(str)+1, sizeof(char));
+ if (*str == openquote)
+ {
+ str++;
+ while (*str != '\0')
+ {
+ if (*str == closequote)
+ {
+ if (str[1] != closequote)
+ break;
+ str++;
+ }
+ *p++ = *str++;
+ }
+ } else
+ {
+ char *esc = get_meta_escape();
+ int esclen = (int) strlen(esc);
+ while (*str != '\0')
+ {
+ if (esclen > 0 && strncmp(str, esc, esclen) == 0)
+ str += esclen;
+ *p++ = *str++;
+ }
+ }
+ *p = '\0';
+ return (name);
+}
+
+/*
+ * Get the shell's escape character.
+ */
+ public char *
+get_meta_escape()
+{
+ char *s;
+
+ s = lgetenv("LESSMETAESCAPE");
+ if (s == NULL)
+ s = DEF_METAESCAPE;
+ return (s);
+}
+
+/*
+ * Get the characters which the shell considers to be "metacharacters".
+ */
+ static char *
+metachars()
+{
+ static char *mchars = NULL;
+
+ if (mchars == NULL)
+ {
+ mchars = lgetenv("LESSMETACHARS");
+ if (mchars == NULL)
+ mchars = DEF_METACHARS;
+ }
+ return (mchars);
+}
+
+/*
+ * Is this a shell metacharacter?
+ */
+ static int
+metachar(c)
+ char c;
+{
+ return (strchr(metachars(), c) != NULL);
+}
+
+/*
+ * Insert a backslash before each metacharacter in a string.
+ */
+ public char *
+shell_quote(s)
+ char *s;
+{
+ char *p;
+ char *newstr;
+ int len;
+ char *esc = get_meta_escape();
+ int esclen = (int) strlen(esc);
+ int use_quotes = 0;
+ int have_quotes = 0;
+
+ /*
+ * Determine how big a string we need to allocate.
+ */
+ len = 1; /* Trailing null byte */
+ for (p = s; *p != '\0'; p++)
+ {
+ len++;
+ if (*p == openquote || *p == closequote)
+ have_quotes = 1;
+ if (metachar(*p))
+ {
+ if (esclen == 0)
+ {
+ /*
+ * We've got a metachar, but this shell
+ * doesn't support escape chars. Use quotes.
+ */
+ use_quotes = 1;
+ } else
+ {
+ /*
+ * Allow space for the escape char.
+ */
+ len += esclen;
+ }
+ }
+ }
+ if (use_quotes)
+ {
+ if (have_quotes)
+ /*
+ * We can't quote a string that contains quotes.
+ */
+ return (NULL);
+ len = (int) strlen(s) + 3;
+ }
+ /*
+ * Allocate and construct the new string.
+ */
+ newstr = p = (char *) ecalloc(len, sizeof(char));
+ if (use_quotes)
+ {
+ SNPRINTF3(newstr, len, "%c%s%c", openquote, s, closequote);
+ } else
+ {
+ while (*s != '\0')
+ {
+ if (metachar(*s))
+ {
+ /*
+ * Add the escape char.
+ */
+ strcpy(p, esc);
+ p += esclen;
+ }
+ *p++ = *s++;
+ }
+ *p = '\0';
+ }
+ return (newstr);
+}
+
+/*
+ * Return a pathname that points to a specified file in a specified directory.
+ * Return NULL if the file does not exist in the directory.
+ */
+ static char *
+dirfile(dirname, filename)
+ char *dirname;
+ char *filename;
+{
+ char *pathname;
+ char *qpathname;
+ int len;
+ int f;
+
+ if (dirname == NULL || *dirname == '\0')
+ return (NULL);
+ /*
+ * Construct the full pathname.
+ */
+ len = (int) (strlen(dirname) + strlen(filename) + 2);
+ pathname = (char *) calloc(len, sizeof(char));
+ if (pathname == NULL)
+ return (NULL);
+ SNPRINTF3(pathname, len, "%s%s%s", dirname, PATHNAME_SEP, filename);
+ /*
+ * Make sure the file exists.
+ */
+ qpathname = shell_unquote(pathname);
+ f = open(qpathname, OPEN_READ);
+ if (f < 0)
+ {
+ free(pathname);
+ pathname = NULL;
+ } else
+ {
+ close(f);
+ }
+ free(qpathname);
+ return (pathname);
+}
+
+/*
+ * Return the full pathname of the given file in the "home directory".
+ */
+ public char *
+homefile(filename)
+ char *filename;
+{
+ register char *pathname;
+
+ /*
+ * Try $HOME/filename.
+ */
+ pathname = dirfile(lgetenv("HOME"), filename);
+ if (pathname != NULL)
+ return (pathname);
+#if OS2
+ /*
+ * Try $INIT/filename.
+ */
+ pathname = dirfile(lgetenv("INIT"), filename);
+ if (pathname != NULL)
+ return (pathname);
+#endif
+#if MSDOS_COMPILER || OS2
+ /*
+ * Look for the file anywhere on search path.
+ */
+ pathname = (char *) calloc(_MAX_PATH, sizeof(char));
+#if MSDOS_COMPILER==DJGPPC
+ {
+ char *res = searchpath(filename);
+ if (res == 0)
+ *pathname = '\0';
+ else
+ strcpy(pathname, res);
+ }
+#else
+ _searchenv(filename, "PATH", pathname);
+#endif
+ if (*pathname != '\0')
+ return (pathname);
+ free(pathname);
+#endif
+ return (NULL);
+}
+
+/*
+ * Expand a string, substituting any "%" with the current filename,
+ * and any "#" with the previous filename.
+ * But a string of N "%"s is just replaced with N-1 "%"s.
+ * Likewise for a string of N "#"s.
+ * {{ This is a lot of work just to support % and #. }}
+ */
+ public char *
+fexpand(s)
+ char *s;
+{
+ register char *fr, *to;
+ register int n;
+ register char *e;
+ IFILE ifile;
+
+#define fchar_ifile(c) \
+ ((c) == '%' ? curr_ifile : \
+ (c) == '#' ? old_ifile : NULL_IFILE)
+
+ /*
+ * Make one pass to see how big a buffer we
+ * need to allocate for the expanded string.
+ */
+ n = 0;
+ for (fr = s; *fr != '\0'; fr++)
+ {
+ switch (*fr)
+ {
+ case '%':
+ case '#':
+ if (fr > s && fr[-1] == *fr)
+ {
+ /*
+ * Second (or later) char in a string
+ * of identical chars. Treat as normal.
+ */
+ n++;
+ } else if (fr[1] != *fr)
+ {
+ /*
+ * Single char (not repeated). Treat specially.
+ */
+ ifile = fchar_ifile(*fr);
+ if (ifile == NULL_IFILE)
+ n++;
+ else
+ n += (int) strlen(get_filename(ifile));
+ }
+ /*
+ * Else it is the first char in a string of
+ * identical chars. Just discard it.
+ */
+ break;
+ default:
+ n++;
+ break;
+ }
+ }
+
+ e = (char *) ecalloc(n+1, sizeof(char));
+
+ /*
+ * Now copy the string, expanding any "%" or "#".
+ */
+ to = e;
+ for (fr = s; *fr != '\0'; fr++)
+ {
+ switch (*fr)
+ {
+ case '%':
+ case '#':
+ if (fr > s && fr[-1] == *fr)
+ {
+ *to++ = *fr;
+ } else if (fr[1] != *fr)
+ {
+ ifile = fchar_ifile(*fr);
+ if (ifile == NULL_IFILE)
+ *to++ = *fr;
+ else
+ {
+ strcpy(to, get_filename(ifile));
+ to += strlen(to);
+ }
+ }
+ break;
+ default:
+ *to++ = *fr;
+ break;
+ }
+ }
+ *to = '\0';
+ return (e);
+}
+
+
+#if TAB_COMPLETE_FILENAME
+
+/*
+ * Return a blank-separated list of filenames which "complete"
+ * the given string.
+ */
+ public char *
+fcomplete(s)
+ char *s;
+{
+ char *fpat;
+ char *qs;
+
+ if (secure)
+ return (NULL);
+ /*
+ * Complete the filename "s" by globbing "s*".
+ */
+#if MSDOS_COMPILER && (MSDOS_COMPILER == MSOFTC || MSDOS_COMPILER == BORLANDC)
+ /*
+ * But in DOS, we have to glob "s*.*".
+ * But if the final component of the filename already has
+ * a dot in it, just do "s*".
+ * (Thus, "FILE" is globbed as "FILE*.*",
+ * but "FILE.A" is globbed as "FILE.A*").
+ */
+ {
+ char *slash;
+ int len;
+ for (slash = s+strlen(s)-1; slash > s; slash--)
+ if (*slash == *PATHNAME_SEP || *slash == '/')
+ break;
+ len = (int) strlen(s) + 4;
+ fpat = (char *) ecalloc(len, sizeof(char));
+ if (strchr(slash, '.') == NULL)
+ SNPRINTF1(fpat, len, "%s*.*", s);
+ else
+ SNPRINTF1(fpat, len, "%s*", s);
+ }
+#else
+ {
+ int len = (int) strlen(s) + 2;
+ fpat = (char *) ecalloc(len, sizeof(char));
+ SNPRINTF1(fpat, len, "%s*", s);
+ }
+#endif
+ qs = lglob(fpat);
+ s = shell_unquote(qs);
+ if (strcmp(s,fpat) == 0)
+ {
+ /*
+ * The filename didn't expand.
+ */
+ free(qs);
+ qs = NULL;
+ }
+ free(s);
+ free(fpat);
+ return (qs);
+}
+#endif
+
+/*
+ * Try to determine if a file is "binary".
+ * This is just a guess, and we need not try too hard to make it accurate.
+ */
+ public int
+bin_file(f)
+ int f;
+{
+ int n;
+ int bin_count = 0;
+ char data[256];
+ char* p;
+ char* pend;
+
+ if (!seekable(f))
+ return (0);
+ if (lseek(f, (off_t)0, SEEK_SET) == BAD_LSEEK)
+ return (0);
+ n = read(f, data, sizeof(data));
+ if (n <= 0)
+ return (0);
+ if (utf_mode)
+ {
+ bin_count = utf_bin_count(data, n);
+ } else
+ {
+ pend = &data[n];
+ for (p = data; p < pend; )
+ {
+ LWCHAR c = step_char(&p, +1, pend);
+ if (ctldisp == OPT_ONPLUS && IS_CSI_START(c))
+ {
+ do {
+ c = step_char(&p, +1, pend);
+ } while (p < pend && is_ansi_middle(c));
+ } else if (binary_char(c))
+ bin_count++;
+ }
+ }
+ /*
+ * Call it a binary file if there are more than 5 binary characters
+ * in the first 256 bytes of the file.
+ */
+ return (bin_count > 5);
+}
+
+/*
+ * Try to determine the size of a file by seeking to the end.
+ */
+ static POSITION
+seek_filesize(f)
+ int f;
+{
+ off_t spos;
+
+ spos = lseek(f, (off_t)0, SEEK_END);
+ if (spos == BAD_LSEEK)
+ return (NULL_POSITION);
+ return ((POSITION) spos);
+}
+
+/*
+ * Read a string from a file.
+ * Return a pointer to the string in memory.
+ */
+ static char *
+readfd(fd)
+ FILE *fd;
+{
+ int len;
+ int ch;
+ char *buf;
+ char *p;
+
+ /*
+ * Make a guess about how many chars in the string
+ * and allocate a buffer to hold it.
+ */
+ len = 100;
+ buf = (char *) ecalloc(len, sizeof(char));
+ for (p = buf; ; p++)
+ {
+ if ((ch = getc(fd)) == '\n' || ch == EOF)
+ break;
+ if (p - buf >= len-1)
+ {
+ /*
+ * The string is too big to fit in the buffer we have.
+ * Allocate a new buffer, twice as big.
+ */
+ len *= 2;
+ *p = '\0';
+ p = (char *) ecalloc(len, sizeof(char));
+ strcpy(p, buf);
+ free(buf);
+ buf = p;
+ p = buf + strlen(buf);
+ }
+ *p = ch;
+ }
+ *p = '\0';
+ return (buf);
+}
+
+
+
+#if HAVE_POPEN
+
+FILE *popen();
+
+/*
+ * Execute a shell command.
+ * Return a pointer to a pipe connected to the shell command's standard output.
+ */
+ static FILE *
+shellcmd(cmd)
+ char *cmd;
+{
+ FILE *fd;
+
+#if HAVE_SHELL
+ char *shell;
+
+ shell = lgetenv("SHELL");
+ if (shell != NULL && *shell != '\0')
+ {
+ char *scmd;
+ char *esccmd;
+
+ /*
+ * Read the output of <$SHELL -c cmd>.
+ * Escape any metacharacters in the command.
+ */
+ esccmd = shell_quote(cmd);
+ if (esccmd == NULL)
+ {
+ fd = popen(cmd, "r");
+ } else
+ {
+ int len = (int) (strlen(shell) + strlen(esccmd) + 5);
+ scmd = (char *) ecalloc(len, sizeof(char));
+ SNPRINTF3(scmd, len, "%s %s %s", shell, shell_coption(), esccmd);
+ free(esccmd);
+ fd = popen(scmd, "r");
+ free(scmd);
+ }
+ } else
+#endif
+ {
+ fd = popen(cmd, "r");
+ }
+ /*
+ * Redirection in `popen' might have messed with the
+ * standard devices. Restore binary input mode.
+ */
+ SET_BINARY(0);
+ return (fd);
+}
+
+#endif /* HAVE_POPEN */
+
+
+/*
+ * Expand a filename, doing any system-specific metacharacter substitutions.
+ */
+ public char *
+lglob(filename)
+ char *filename;
+{
+ char *gfilename;
+ char *ofilename;
+
+ ofilename = fexpand(filename);
+ if (secure)
+ return (ofilename);
+ filename = shell_unquote(ofilename);
+
+#ifdef DECL_GLOB_LIST
+{
+ /*
+ * The globbing function returns a list of names.
+ */
+ int length;
+ char *p;
+ char *qfilename;
+ DECL_GLOB_LIST(list)
+
+ GLOB_LIST(filename, list);
+ if (GLOB_LIST_FAILED(list))
+ {
+ free(filename);
+ return (ofilename);
+ }
+ length = 1; /* Room for trailing null byte */
+ for (SCAN_GLOB_LIST(list, p))
+ {
+ INIT_GLOB_LIST(list, p);
+ qfilename = shell_quote(p);
+ if (qfilename != NULL)
+ {
+ length += strlen(qfilename) + 1;
+ free(qfilename);
+ }
+ }
+ gfilename = (char *) ecalloc(length, sizeof(char));
+ for (SCAN_GLOB_LIST(list, p))
+ {
+ INIT_GLOB_LIST(list, p);
+ qfilename = shell_quote(p);
+ if (qfilename != NULL)
+ {
+ sprintf(gfilename + strlen(gfilename), "%s ", qfilename);
+ free(qfilename);
+ }
+ }
+ /*
+ * Overwrite the final trailing space with a null terminator.
+ */
+ *--p = '\0';
+ GLOB_LIST_DONE(list);
+}
+#else
+#ifdef DECL_GLOB_NAME
+{
+ /*
+ * The globbing function returns a single name, and
+ * is called multiple times to walk thru all names.
+ */
+ register char *p;
+ register int len;
+ register int n;
+ char *pathname;
+ char *qpathname;
+ DECL_GLOB_NAME(fnd,drive,dir,fname,ext,handle)
+
+ GLOB_FIRST_NAME(filename, &fnd, handle);
+ if (GLOB_FIRST_FAILED(handle))
+ {
+ free(filename);
+ return (ofilename);
+ }
+
+ _splitpath(filename, drive, dir, fname, ext);
+ len = 100;
+ gfilename = (char *) ecalloc(len, sizeof(char));
+ p = gfilename;
+ do {
+ n = (int) (strlen(drive) + strlen(dir) + strlen(fnd.GLOB_NAME) + 1);
+ pathname = (char *) ecalloc(n, sizeof(char));
+ SNPRINTF3(pathname, n, "%s%s%s", drive, dir, fnd.GLOB_NAME);
+ qpathname = shell_quote(pathname);
+ free(pathname);
+ if (qpathname != NULL)
+ {
+ n = (int) strlen(qpathname);
+ while (p - gfilename + n + 2 >= len)
+ {
+ /*
+ * No room in current buffer.
+ * Allocate a bigger one.
+ */
+ len *= 2;
+ *p = '\0';
+ p = (char *) ecalloc(len, sizeof(char));
+ strcpy(p, gfilename);
+ free(gfilename);
+ gfilename = p;
+ p = gfilename + strlen(gfilename);
+ }
+ strcpy(p, qpathname);
+ free(qpathname);
+ p += n;
+ *p++ = ' ';
+ }
+ } while (GLOB_NEXT_NAME(handle, &fnd) == 0);
+
+ /*
+ * Overwrite the final trailing space with a null terminator.
+ */
+ *--p = '\0';
+ GLOB_NAME_DONE(handle);
+}
+#else
+#if HAVE_POPEN
+{
+ /*
+ * We get the shell to glob the filename for us by passing
+ * an "echo" command to the shell and reading its output.
+ */
+ FILE *fd;
+ char *s;
+ char *lessecho;
+ char *cmd;
+ char *esc;
+ int len;
+
+ esc = get_meta_escape();
+ if (strlen(esc) == 0)
+ esc = "-";
+ esc = shell_quote(esc);
+ if (esc == NULL)
+ {
+ free(filename);
+ return (ofilename);
+ }
+ lessecho = lgetenv("LESSECHO");
+ if (lessecho == NULL || *lessecho == '\0')
+ lessecho = "lessecho";
+ /*
+ * Invoke lessecho, and read its output (a globbed list of filenames).
+ */
+ len = (int) (strlen(lessecho) + strlen(ofilename) + (7*strlen(metachars())) + 24);
+ cmd = (char *) ecalloc(len, sizeof(char));
+ SNPRINTF4(cmd, len, "%s -p0x%x -d0x%x -e%s ", lessecho, openquote, closequote, esc);
+ free(esc);
+ for (s = metachars(); *s != '\0'; s++)
+ sprintf(cmd + strlen(cmd), "-n0x%x ", *s);
+ sprintf(cmd + strlen(cmd), "-- %s", ofilename);
+ fd = shellcmd(cmd);
+ free(cmd);
+ if (fd == NULL)
+ {
+ /*
+ * Cannot create the pipe.
+ * Just return the original (fexpanded) filename.
+ */
+ free(filename);
+ return (ofilename);
+ }
+ gfilename = readfd(fd);
+ pclose(fd);
+ if (*gfilename == '\0')
+ {
+ free(gfilename);
+ free(filename);
+ return (ofilename);
+ }
+}
+#else
+ /*
+ * No globbing functions at all. Just use the fexpanded filename.
+ */
+ gfilename = save(filename);
+#endif
+#endif
+#endif
+ free(filename);
+ free(ofilename);
+ return (gfilename);
+}
+
+/*
+ * Return number of %s escapes in a string.
+ * Return a large number if there are any other % escapes besides %s.
+ */
+ static int
+num_pct_s(lessopen)
+ char *lessopen;
+{
+ int num = 0;
+
+ while (*lessopen != '\0')
+ {
+ if (*lessopen == '%')
+ {
+ if (lessopen[1] == '%')
+ ++lessopen;
+ else if (lessopen[1] == 's')
+ ++num;
+ else
+ return (999);
+ }
+ ++lessopen;
+ }
+ return (num);
+}
+
+/*
+ * See if we should open a "replacement file"
+ * instead of the file we're about to open.
+ */
+ public char *
+open_altfile(filename, pf, pfd)
+ char *filename;
+ int *pf;
+ void **pfd;
+{
+#if !HAVE_POPEN
+ return (NULL);
+#else
+ char *lessopen;
+ char *cmd;
+ int len;
+ FILE *fd;
+#if HAVE_FILENO
+ int returnfd = 0;
+#endif
+
+ if (!use_lessopen || secure)
+ return (NULL);
+ ch_ungetchar(-1);
+ if ((lessopen = lgetenv("LESSOPEN")) == NULL)
+ return (NULL);
+ while (*lessopen == '|')
+ {
+ /*
+ * If LESSOPEN starts with a |, it indicates
+ * a "pipe preprocessor".
+ */
+#if !HAVE_FILENO
+ error("LESSOPEN pipe is not supported", NULL_PARG);
+ return (NULL);
+#else
+ lessopen++;
+ returnfd++;
+#endif
+ }
+ if (*lessopen == '-') {
+ /*
+ * Lessopen preprocessor will accept "-" as a filename.
+ */
+ lessopen++;
+ } else {
+ if (strcmp(filename, "-") == 0)
+ return (NULL);
+ }
+ if (num_pct_s(lessopen) > 1)
+ {
+ error("Invalid LESSOPEN variable", NULL_PARG);
+ return (NULL);
+ }
+
+ len = (int) (strlen(lessopen) + strlen(filename) + 2);
+ cmd = (char *) ecalloc(len, sizeof(char));
+ SNPRINTF1(cmd, len, lessopen, filename);
+ fd = shellcmd(cmd);
+ free(cmd);
+ if (fd == NULL)
+ {
+ /*
+ * Cannot create the pipe.
+ */
+ return (NULL);
+ }
+#if HAVE_FILENO
+ if (returnfd)
+ {
+ int f;
+ char c;
+
+ /*
+ * Read one char to see if the pipe will produce any data.
+ * If it does, push the char back on the pipe.
+ */
+ f = fileno(fd);
+ SET_BINARY(f);
+ if (read(f, &c, 1) != 1)
+ {
+ /*
+ * Pipe is empty.
+ * If more than 1 pipe char was specified,
+ * the exit status tells whether the file itself
+ * is empty, or if there is no alt file.
+ * If only one pipe char, just assume no alt file.
+ */
+ int status = pclose(fd);
+ if (returnfd > 1 && status == 0) {
+ *pfd = NULL;
+ *pf = -1;
+ return (save(FAKE_EMPTYFILE));
+ }
+ return (NULL);
+ }
+ ch_ungetchar(c);
+ *pfd = (void *) fd;
+ *pf = f;
+ return (save("-"));
+ }
+#endif
+ cmd = readfd(fd);
+ pclose(fd);
+ if (*cmd == '\0')
+ /*
+ * Pipe is empty. This means there is no alt file.
+ */
+ return (NULL);
+ return (cmd);
+#endif /* HAVE_POPEN */
+}
+
+/*
+ * Close a replacement file.
+ */
+ public void
+close_altfile(altfilename, filename, pipefd)
+ char *altfilename;
+ char *filename;
+ void *pipefd;
+{
+#if HAVE_POPEN
+ char *lessclose;
+ FILE *fd;
+ char *cmd;
+ int len;
+
+ if (secure)
+ return;
+ if (pipefd != NULL)
+ {
+#if OS2
+ /*
+ * The pclose function of OS/2 emx sometimes fails.
+ * Send SIGINT to the piped process before closing it.
+ */
+ kill(((FILE*)pipefd)->_pid, SIGINT);
+#endif
+ pclose((FILE*) pipefd);
+ }
+ if ((lessclose = lgetenv("LESSCLOSE")) == NULL)
+ return;
+ if (num_pct_s(lessclose) > 2)
+ {
+ error("Invalid LESSCLOSE variable", NULL_PARG);
+ return;
+ }
+ len = (int) (strlen(lessclose) + strlen(filename) + strlen(altfilename) + 2);
+ cmd = (char *) ecalloc(len, sizeof(char));
+ SNPRINTF2(cmd, len, lessclose, filename, altfilename);
+ fd = shellcmd(cmd);
+ free(cmd);
+ if (fd != NULL)
+ pclose(fd);
+#endif
+}
+
+/*
+ * Is the specified file a directory?
+ */
+ public int
+is_dir(filename)
+ char *filename;
+{
+ int isdir = 0;
+
+ filename = shell_unquote(filename);
+#if HAVE_STAT
+{
+ int r;
+ struct stat statbuf;
+
+ r = stat(filename, &statbuf);
+ isdir = (r >= 0 && S_ISDIR(statbuf.st_mode));
+}
+#else
+#ifdef _OSK
+{
+ register int f;
+
+ f = open(filename, S_IREAD | S_IFDIR);
+ if (f >= 0)
+ close(f);
+ isdir = (f >= 0);
+}
+#endif
+#endif
+ free(filename);
+ return (isdir);
+}
+
+/*
+ * Returns NULL if the file can be opened and
+ * is an ordinary file, otherwise an error message
+ * (if it cannot be opened or is a directory, etc.)
+ */
+ public char *
+bad_file(filename)
+ char *filename;
+{
+ register char *m = NULL;
+
+ filename = shell_unquote(filename);
+ if (!force_open && is_dir(filename))
+ {
+ static char is_a_dir[] = " is a directory";
+
+ m = (char *) ecalloc(strlen(filename) + sizeof(is_a_dir),
+ sizeof(char));
+ strcpy(m, filename);
+ strcat(m, is_a_dir);
+ } else
+ {
+#if HAVE_STAT
+ int r;
+ struct stat statbuf;
+
+ r = stat(filename, &statbuf);
+ if (r < 0)
+ {
+ m = errno_message(filename);
+ } else if (force_open)
+ {
+ m = NULL;
+ } else if (!S_ISREG(statbuf.st_mode))
+ {
+ static char not_reg[] = " is not a regular file (use -f to see it)";
+ m = (char *) ecalloc(strlen(filename) + sizeof(not_reg),
+ sizeof(char));
+ strcpy(m, filename);
+ strcat(m, not_reg);
+ }
+#endif
+ }
+ free(filename);
+ return (m);
+}
+
+/*
+ * Return the size of a file, as cheaply as possible.
+ * In Unix, we can stat the file.
+ */
+ public POSITION
+filesize(f)
+ int f;
+{
+#if HAVE_STAT
+ struct stat statbuf;
+
+ if (fstat(f, &statbuf) >= 0)
+ return ((POSITION) statbuf.st_size);
+#else
+#ifdef _OSK
+ long size;
+
+ if ((size = (long) _gs_size(f)) >= 0)
+ return ((POSITION) size);
+#endif
+#endif
+ return (seek_filesize(f));
+}
+
+/*
+ *
+ */
+ public char *
+shell_coption()
+{
+ return ("-c");
+}
+
+/*
+ * Return last component of a pathname.
+ */
+ public char *
+last_component(name)
+ char *name;
+{
+ char *slash;
+
+ for (slash = name + strlen(name); slash > name; )
+ {
+ --slash;
+ if (*slash == *PATHNAME_SEP || *slash == '/')
+ return (slash + 1);
+ }
+ return (name);
+}
+
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Primitives for displaying the file on the screen,
+ * scrolling either forward or backward.
+ */
+
+#include "less.h"
+#include "position.h"
+
+public int screen_trashed;
+public int squished;
+public int no_back_scroll = 0;
+public int forw_prompt;
+public int same_pos_bell = 1;
+
+extern int sigs;
+extern int top_scroll;
+extern int quiet;
+extern int sc_width, sc_height;
+extern int plusoption;
+extern int forw_scroll;
+extern int back_scroll;
+extern int ignore_eoi;
+extern int clear_bg;
+extern int final_attr;
+extern int oldbot;
+#if HILITE_SEARCH
+extern int size_linebuf;
+extern int hilite_search;
+extern int status_col;
+#endif
+#if TAGS
+extern char *tagoption;
+#endif
+
+/*
+ * Sound the bell to indicate user is trying to move past end of file.
+ */
+ static void
+eof_bell()
+{
+ if (quiet == NOT_QUIET)
+ bell();
+ else
+ vbell();
+}
+
+/*
+ * Check to see if the end of file is currently displayed.
+ */
+ public int
+eof_displayed()
+{
+ POSITION pos;
+
+ if (ignore_eoi)
+ return (0);
+
+ if (ch_length() == NULL_POSITION)
+ /*
+ * If the file length is not known,
+ * we can't possibly be displaying EOF.
+ */
+ return (0);
+
+ /*
+ * If the bottom line is empty, we are at EOF.
+ * If the bottom line ends at the file length,
+ * we must be just at EOF.
+ */
+ pos = position(BOTTOM_PLUS_ONE);
+ return (pos == NULL_POSITION || pos == ch_length());
+}
+
+/*
+ * Check to see if the entire file is currently displayed.
+ */
+ public int
+entire_file_displayed()
+{
+ POSITION pos;
+
+ /* Make sure last line of file is displayed. */
+ if (!eof_displayed())
+ return (0);
+
+ /* Make sure first line of file is displayed. */
+ pos = position(0);
+ return (pos == NULL_POSITION || pos == 0);
+}
+
+/*
+ * If the screen is "squished", repaint it.
+ * "Squished" means the first displayed line is not at the top
+ * of the screen; this can happen when we display a short file
+ * for the first time.
+ */
+ public void
+squish_check()
+{
+ if (!squished)
+ return;
+ squished = 0;
+ repaint();
+}
+
+/*
+ * Display n lines, scrolling forward,
+ * starting at position pos in the input file.
+ * "force" means display the n lines even if we hit end of file.
+ * "only_last" means display only the last screenful if n > screen size.
+ * "nblank" is the number of blank lines to draw before the first
+ * real line. If nblank > 0, the pos must be NULL_POSITION.
+ * The first real line after the blanks will start at ch_zero().
+ */
+ public void
+forw(n, pos, force, only_last, nblank)
+ register int n;
+ POSITION pos;
+ int force;
+ int only_last;
+ int nblank;
+{
+ int nlines = 0;
+ int do_repaint;
+ static int first_time = 1;
+
+ squish_check();
+
+ /*
+ * do_repaint tells us not to display anything till the end,
+ * then just repaint the entire screen.
+ * We repaint if we are supposed to display only the last
+ * screenful and the request is for more than a screenful.
+ * Also if the request exceeds the forward scroll limit
+ * (but not if the request is for exactly a screenful, since
+ * repainting itself involves scrolling forward a screenful).
+ */
+ do_repaint = (only_last && n > sc_height-1) ||
+ (forw_scroll >= 0 && n > forw_scroll && n != sc_height-1);
+
+#if HILITE_SEARCH
+ if (hilite_search == OPT_ONPLUS || is_filtering() || status_col) {
+ prep_hilite(pos, pos + 4*size_linebuf, ignore_eoi ? 1 : -1);
+ pos = next_unfiltered(pos);
+ }
+#endif
+
+ if (!do_repaint)
+ {
+ if (top_scroll && n >= sc_height - 1 && pos != ch_length())
+ {
+ /*
+ * Start a new screen.
+ * {{ This is not really desirable if we happen
+ * to hit eof in the middle of this screen,
+ * but we don't yet know if that will happen. }}
+ */
+ pos_clear();
+ add_forw_pos(pos);
+ force = 1;
+ clear();
+ home();
+ }
+
+ if (pos != position(BOTTOM_PLUS_ONE) || empty_screen())
+ {
+ /*
+ * This is not contiguous with what is
+ * currently displayed. Clear the screen image
+ * (position table) and start a new screen.
+ */
+ pos_clear();
+ add_forw_pos(pos);
+ force = 1;
+ if (top_scroll)
+ {
+ clear();
+ home();
+ } else if (!first_time)
+ {
+ putstr("...skipping...\n");
+ }
+ }
+ }
+
+ while (--n >= 0)
+ {
+ /*
+ * Read the next line of input.
+ */
+ if (nblank > 0)
+ {
+ /*
+ * Still drawing blanks; don't get a line
+ * from the file yet.
+ * If this is the last blank line, get ready to
+ * read a line starting at ch_zero() next time.
+ */
+ if (--nblank == 0)
+ pos = ch_zero();
+ } else
+ {
+ /*
+ * Get the next line from the file.
+ */
+ pos = forw_line(pos);
+#if HILITE_SEARCH
+ pos = next_unfiltered(pos);
+#endif
+ if (pos == NULL_POSITION)
+ {
+ /*
+ * End of file: stop here unless the top line
+ * is still empty, or "force" is true.
+ * Even if force is true, stop when the last
+ * line in the file reaches the top of screen.
+ */
+ if (!force && position(TOP) != NULL_POSITION)
+ break;
+ if (!empty_lines(0, 0) &&
+ !empty_lines(1, 1) &&
+ empty_lines(2, sc_height-1))
+ break;
+ }
+ }
+ /*
+ * Add the position of the next line to the position table.
+ * Display the current line on the screen.
+ */
+ add_forw_pos(pos);
+ nlines++;
+ if (do_repaint)
+ continue;
+ /*
+ * If this is the first screen displayed and
+ * we hit an early EOF (i.e. before the requested
+ * number of lines), we "squish" the display down
+ * at the bottom of the screen.
+ * But don't do this if a + option or a -t option
+ * was given. These options can cause us to
+ * start the display after the beginning of the file,
+ * and it is not appropriate to squish in that case.
+ */
+ if (first_time && pos == NULL_POSITION && !top_scroll &&
+#if TAGS
+ tagoption == NULL &&
+#endif
+ !plusoption)
+ {
+ squished = 1;
+ continue;
+ }
+ put_line();
+#if 0
+ /* {{
+ * Can't call clear_eol here. The cursor might be at end of line
+ * on an ignaw terminal, so clear_eol would clear the last char
+ * of the current line instead of all of the next line.
+ * If we really need to do this on clear_bg terminals, we need
+ * to find a better way.
+ * }}
+ */
+ if (clear_bg && apply_at_specials(final_attr) != AT_NORMAL)
+ {
+ /*
+ * Writing the last character on the last line
+ * of the display may have scrolled the screen.
+ * If we were in standout mode, clear_bg terminals
+ * will fill the new line with the standout color.
+ * Now we're in normal mode again, so clear the line.
+ */
+ clear_eol();
+ }
+#endif
+ forw_prompt = 1;
+ }
+
+ if (nlines == 0 && same_pos_bell)
+ eof_bell();
+ else if (do_repaint)
+ repaint();
+ first_time = 0;
+ (void) currline(BOTTOM);
+}
+
+/*
+ * Display n lines, scrolling backward.
+ */
+ public void
+back(n, pos, force, only_last)
+ register int n;
+ POSITION pos;
+ int force;
+ int only_last;
+{
+ int nlines = 0;
+ int do_repaint;
+
+ squish_check();
+ do_repaint = (n > get_back_scroll() || (only_last && n > sc_height-1));
+#if HILITE_SEARCH
+ if (hilite_search == OPT_ONPLUS || is_filtering() || status_col) {
+ prep_hilite((pos < 3*size_linebuf) ? 0 : pos - 3*size_linebuf, pos, -1);
+ }
+#endif
+ while (--n >= 0)
+ {
+ /*
+ * Get the previous line of input.
+ */
+#if HILITE_SEARCH
+ pos = prev_unfiltered(pos);
+#endif
+
+ pos = back_line(pos);
+ if (pos == NULL_POSITION)
+ {
+ /*
+ * Beginning of file: stop here unless "force" is true.
+ */
+ if (!force)
+ break;
+ }
+ /*
+ * Add the position of the previous line to the position table.
+ * Display the line on the screen.
+ */
+ add_back_pos(pos);
+ nlines++;
+ if (!do_repaint)
+ {
+ home();
+ add_line();
+ put_line();
+ }
+ }
+
+ if (nlines == 0 && same_pos_bell)
+ eof_bell();
+ else if (do_repaint)
+ repaint();
+ else if (!oldbot)
+ lower_left();
+ (void) currline(BOTTOM);
+}
+
+/*
+ * Display n more lines, forward.
+ * Start just after the line currently displayed at the bottom of the screen.
+ */
+ public void
+forward(n, force, only_last)
+ int n;
+ int force;
+ int only_last;
+{
+ POSITION pos;
+
+ if (get_quit_at_eof() && eof_displayed() && !(ch_getflags() & CH_HELPFILE))
+ {
+ /*
+ * If the -e flag is set and we're trying to go
+ * forward from end-of-file, go on to the next file.
+ */
+ if (edit_next(1))
+ quit(QUIT_OK);
+ return;
+ }
+
+ pos = position(BOTTOM_PLUS_ONE);
+ if (pos == NULL_POSITION && (!force || empty_lines(2, sc_height-1)))
+ {
+ if (ignore_eoi)
+ {
+ /*
+ * ignore_eoi is to support A_F_FOREVER.
+ * Back up until there is a line at the bottom
+ * of the screen.
+ */
+ if (empty_screen())
+ pos = ch_zero();
+ else
+ {
+ do
+ {
+ back(1, position(TOP), 1, 0);
+ pos = position(BOTTOM_PLUS_ONE);
+ } while (pos == NULL_POSITION);
+ }
+ } else
+ {
+ eof_bell();
+ return;
+ }
+ }
+ forw(n, pos, force, only_last, 0);
+}
+
+/*
+ * Display n more lines, backward.
+ * Start just before the line currently displayed at the top of the screen.
+ */
+ public void
+backward(n, force, only_last)
+ int n;
+ int force;
+ int only_last;
+{
+ POSITION pos;
+
+ pos = position(TOP);
+ if (pos == NULL_POSITION && (!force || position(BOTTOM) == 0))
+ {
+ eof_bell();
+ return;
+ }
+ back(n, pos, force, only_last);
+}
+
+/*
+ * Get the backwards scroll limit.
+ * Must call this function instead of just using the value of
+ * back_scroll, because the default case depends on sc_height and
+ * top_scroll, as well as back_scroll.
+ */
+ public int
+get_back_scroll()
+{
+ if (no_back_scroll)
+ return (0);
+ if (back_scroll >= 0)
+ return (back_scroll);
+ if (top_scroll)
+ return (sc_height - 2);
+ return (10000); /* infinity */
+}
--- /dev/null
+ public char * save ();
+ public VOID_POINTER ecalloc ();
+ public char * skipsp ();
+ public int sprefix ();
+ public void quit ();
+ public void raw_mode ();
+ public void scrsize ();
+ public char * special_key_str ();
+ public void get_term ();
+ public void init ();
+ public void deinit ();
+ public void home ();
+ public void add_line ();
+ public void remove_top ();
+ public void win32_scroll_up ();
+ public void lower_left ();
+ public void line_left ();
+ public void check_winch ();
+ public void goto_line ();
+ public void vbell ();
+ public void bell ();
+ public void clear ();
+ public void clear_eol ();
+ public void clear_bot ();
+ public void at_enter ();
+ public void at_exit ();
+ public void at_switch ();
+ public int is_at_equiv ();
+ public int apply_at_specials ();
+ public void backspace ();
+ public void putbs ();
+ public char WIN32getch ();
+ public void WIN32setcolors ();
+ public void WIN32textout ();
+ public void match_brac ();
+ public void ch_ungetchar ();
+ public void end_logfile ();
+ public void sync_logfile ();
+ public int ch_seek ();
+ public int ch_end_seek ();
+ public int ch_end_buffer_seek ();
+ public int ch_beg_seek ();
+ public POSITION ch_length ();
+ public POSITION ch_tell ();
+ public int ch_forw_get ();
+ public int ch_back_get ();
+ public void ch_setbufspace ();
+ public void ch_flush ();
+ public int seekable ();
+ public void ch_set_eof ();
+ public void ch_init ();
+ public void ch_close ();
+ public int ch_getflags ();
+ public void ch_dump ();
+ public void init_charset ();
+ public int binary_char ();
+ public int control_char ();
+ public char * prchar ();
+ public char * prutfchar ();
+ public int utf_len ();
+ public int is_utf8_well_formed ();
+ public int utf_bin_count ();
+ public LWCHAR get_wchar ();
+ public void put_wchar ();
+ public LWCHAR step_char ();
+ public int is_composing_char ();
+ public int is_ubin_char ();
+ public int is_wide_char ();
+ public int is_combining_char ();
+ public void cmd_reset ();
+ public void clear_cmd ();
+ public void cmd_putstr ();
+ public int len_cmdbuf ();
+ public void set_mlist ();
+ public void cmd_addhist ();
+ public void cmd_accept ();
+ public int cmd_char ();
+ public LINENUM cmd_int ();
+ public char * get_cmdbuf ();
+ public char * cmd_lastpattern ();
+ public void init_cmdhist ();
+ public void save_cmdhist ();
+ public int in_mca ();
+ public void dispversion ();
+ public int getcc ();
+ public void ungetcc ();
+ public void ungetsc ();
+ public void commands ();
+ public int cvt_length ();
+ public int * cvt_alloc_chpos ();
+ public void cvt_text ();
+ public void init_cmds ();
+ public void add_fcmd_table ();
+ public void add_ecmd_table ();
+ public int fcmd_decode ();
+ public int ecmd_decode ();
+ public char * lgetenv ();
+ public int lesskey ();
+ public void add_hometable ();
+ public int editchar ();
+ public void init_textlist ();
+ public char * forw_textlist ();
+ public char * back_textlist ();
+ public int edit ();
+ public int edit_ifile ();
+ public int edit_list ();
+ public int edit_first ();
+ public int edit_last ();
+ public int edit_next ();
+ public int edit_prev ();
+ public int edit_index ();
+ public IFILE save_curr_ifile ();
+ public void unsave_ifile ();
+ public void reedit_ifile ();
+ public void reopen_curr_ifile ();
+ public int edit_stdin ();
+ public void cat_file ();
+ public void use_logfile ();
+ public char * shell_unquote ();
+ public char * get_meta_escape ();
+ public char * shell_quote ();
+ public char * homefile ();
+ public char * fexpand ();
+ public char * fcomplete ();
+ public int bin_file ();
+ public char * lglob ();
+ public char * open_altfile ();
+ public void close_altfile ();
+ public int is_dir ();
+ public char * bad_file ();
+ public POSITION filesize ();
+ public char * shell_coption ();
+ public char * last_component ();
+ public int eof_displayed ();
+ public int entire_file_displayed ();
+ public void squish_check ();
+ public void forw ();
+ public void back ();
+ public void forward ();
+ public void backward ();
+ public int get_back_scroll ();
+ public void del_ifile ();
+ public IFILE next_ifile ();
+ public IFILE prev_ifile ();
+ public IFILE getoff_ifile ();
+ public int nifile ();
+ public IFILE get_ifile ();
+ public char * get_filename ();
+ public int get_index ();
+ public void store_pos ();
+ public void get_pos ();
+ public void set_open ();
+ public int opened ();
+ public void hold_ifile ();
+ public int held_ifile ();
+ public void * get_filestate ();
+ public void set_filestate ();
+ public void if_dump ();
+ public POSITION forw_line ();
+ public POSITION back_line ();
+ public void set_attnpos ();
+ public void jump_forw ();
+ public void jump_forw_buffered ();
+ public void jump_back ();
+ public void repaint ();
+ public void jump_percent ();
+ public void jump_line_loc ();
+ public void jump_loc ();
+ public void init_line ();
+ public int is_ascii_char ();
+ public void prewind ();
+ public void plinenum ();
+ public void pshift_all ();
+ public int is_ansi_end ();
+ public int is_ansi_middle ();
+ public int pappend ();
+ public int pflushmbc ();
+ public void pdone ();
+ public void set_status_col ();
+ public int gline ();
+ public void null_line ();
+ public POSITION forw_raw_line ();
+ public POSITION back_raw_line ();
+ public void clr_linenum ();
+ public void add_lnum ();
+ public LINENUM find_linenum ();
+ public POSITION find_pos ();
+ public LINENUM currline ();
+ public void lsystem ();
+ public int pipe_mark ();
+ public int pipe_data ();
+ public void init_mark ();
+ public int badmark ();
+ public void setmark ();
+ public void lastmark ();
+ public void gomark ();
+ public POSITION markpos ();
+ public void unmark ();
+ public void opt_o ();
+ public void opt__O ();
+ public void opt_j ();
+ public void calc_jump_sline ();
+ public void opt_shift ();
+ public void calc_shift_count ();
+ public void opt_k ();
+ public void opt_t ();
+ public void opt__T ();
+ public void opt_p ();
+ public void opt__P ();
+ public void opt_b ();
+ public void opt_i ();
+ public void opt__V ();
+ public void opt_D ();
+ public void opt_x ();
+ public void opt_quote ();
+ public void opt_query ();
+ public int get_swindow ();
+ public char * propt ();
+ public void scan_option ();
+ public void toggle_option ();
+ public int opt_has_param ();
+ public char * opt_prompt ();
+ public int isoptpending ();
+ public void nopendopt ();
+ public int getnum ();
+ public long getfraction ();
+ public int get_quit_at_eof ();
+ public void init_option ();
+ public struct loption * findopt ();
+ public struct loption * findopt_name ();
+ public int iread ();
+ public void intread ();
+ public time_type get_time ();
+ public char * errno_message ();
+ public int percentage ();
+ public POSITION percent_pos ();
+ public int os9_signal ();
+ public void put_line ();
+ public void flush ();
+ public int putchr ();
+ public void putstr ();
+ public void get_return ();
+ public void error ();
+ public void ierror ();
+ public int query ();
+ public int compile_pattern ();
+ public void uncompile_pattern ();
+ public int valid_pattern ();
+ public int is_null_pattern ();
+ public int match_pattern ();
+ public POSITION position ();
+ public void add_forw_pos ();
+ public void add_back_pos ();
+ public void pos_clear ();
+ public void pos_init ();
+ public int onscreen ();
+ public int empty_screen ();
+ public int empty_lines ();
+ public void get_scrpos ();
+ public int adjsline ();
+ public void init_prompt ();
+ public char * pr_expand ();
+ public char * eq_message ();
+ public char * pr_string ();
+ public char * wait_message ();
+ public void init_search ();
+ public void repaint_hilite ();
+ public void clear_attn ();
+ public void undo_search ();
+ public void clr_hlist ();
+ public void clr_hilite ();
+ public void clr_filter ();
+ public int is_filtered ();
+ public POSITION next_unfiltered ();
+ public POSITION prev_unfiltered ();
+ public int is_hilited ();
+ public void chg_caseless ();
+ public void chg_hilite ();
+ public int search ();
+ public void prep_hilite ();
+ public void set_filter_pattern ();
+ public int is_filtering ();
+ public RETSIGTYPE winch ();
+ public RETSIGTYPE winch ();
+ public void init_signals ();
+ public void psignals ();
+ public void cleantags ();
+ public int gettagtype ();
+ public void findtag ();
+ public POSITION tagsearch ();
+ public char * nexttag ();
+ public char * prevtag ();
+ public int ntags ();
+ public int curr_tag ();
+ public int edit_tagfile ();
+ public void open_getchr ();
+ public void close_getchr ();
+ public int getchr ();
--- /dev/null
+/* This file was generated by mkhelp from less.hlp */
+#include "less.h"
+constant char helpdata[] = {
+'\n',
+' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','S','\b','S','U','\b','U','M','\b','M','M','\b','M','A','\b','A','R','\b','R','Y','\b','Y',' ','O','\b','O','F','\b','F',' ','L','\b','L','E','\b','E','S','\b','S','S','\b','S',' ','C','\b','C','O','\b','O','M','\b','M','M','\b','M','A','\b','A','N','\b','N','D','\b','D','S','\b','S','\n',
+'\n',
+' ',' ',' ',' ',' ',' ','C','o','m','m','a','n','d','s',' ','m','a','r','k','e','d',' ','w','i','t','h',' ','*',' ','m','a','y',' ','b','e',' ','p','r','e','c','e','d','e','d',' ','b','y',' ','a',' ','n','u','m','b','e','r',',',' ','_','\b','N','.','\n',
+' ',' ',' ',' ',' ',' ','N','o','t','e','s',' ','i','n',' ','p','a','r','e','n','t','h','e','s','e','s',' ','i','n','d','i','c','a','t','e',' ','t','h','e',' ','b','e','h','a','v','i','o','r',' ','i','f',' ','_','\b','N',' ','i','s',' ','g','i','v','e','n','.','\n',
+' ',' ',' ',' ',' ',' ','A',' ','k','e','y',' ','p','r','e','c','e','d','e','d',' ','b','y',' ','a',' ','c','a','r','e','t',' ','i','n','d','i','c','a','t','e','s',' ','t','h','e',' ','C','t','r','l',' ','k','e','y',';',' ','t','h','u','s',' ','^','K',' ','i','s',' ','c','t','r','l','-','K','.','\n',
+'\n',
+' ',' ','h',' ',' ','H',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','D','i','s','p','l','a','y',' ','t','h','i','s',' ','h','e','l','p','.','\n',
+' ',' ','q',' ',' ',':','q',' ',' ','Q',' ',' ',':','Q',' ',' ','Z','Z',' ',' ',' ',' ',' ','E','x','i','t','.','\n',
+' ','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','\n',
+'\n',
+' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','M','\b','M','O','\b','O','V','\b','V','I','\b','I','N','\b','N','G','\b','G','\n',
+'\n',
+' ',' ','e',' ',' ','^','E',' ',' ','j',' ',' ','^','N',' ',' ','C','R',' ',' ','*',' ',' ','F','o','r','w','a','r','d',' ',' ','o','n','e',' ','l','i','n','e',' ',' ',' ','(','o','r',' ','_','\b','N',' ','l','i','n','e','s',')','.','\n',
+' ',' ','y',' ',' ','^','Y',' ',' ','k',' ',' ','^','K',' ',' ','^','P',' ',' ','*',' ',' ','B','a','c','k','w','a','r','d',' ','o','n','e',' ','l','i','n','e',' ',' ',' ','(','o','r',' ','_','\b','N',' ','l','i','n','e','s',')','.','\n',
+' ',' ','f',' ',' ','^','F',' ',' ','^','V',' ',' ','S','P','A','C','E',' ',' ','*',' ',' ','F','o','r','w','a','r','d',' ',' ','o','n','e',' ','w','i','n','d','o','w',' ','(','o','r',' ','_','\b','N',' ','l','i','n','e','s',')','.','\n',
+' ',' ','b',' ',' ','^','B',' ',' ','E','S','C','-','v',' ',' ',' ',' ',' ',' ','*',' ',' ','B','a','c','k','w','a','r','d',' ','o','n','e',' ','w','i','n','d','o','w',' ','(','o','r',' ','_','\b','N',' ','l','i','n','e','s',')','.','\n',
+' ',' ','z',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','F','o','r','w','a','r','d',' ',' ','o','n','e',' ','w','i','n','d','o','w',' ','(','a','n','d',' ','s','e','t',' ','w','i','n','d','o','w',' ','t','o',' ','_','\b','N',')','.','\n',
+' ',' ','w',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','B','a','c','k','w','a','r','d',' ','o','n','e',' ','w','i','n','d','o','w',' ','(','a','n','d',' ','s','e','t',' ','w','i','n','d','o','w',' ','t','o',' ','_','\b','N',')','.','\n',
+' ',' ','E','S','C','-','S','P','A','C','E',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','F','o','r','w','a','r','d',' ',' ','o','n','e',' ','w','i','n','d','o','w',',',' ','b','u','t',' ','d','o','n','\'','t',' ','s','t','o','p',' ','a','t',' ','e','n','d','-','o','f','-','f','i','l','e','.','\n',
+' ',' ','d',' ',' ','^','D',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','F','o','r','w','a','r','d',' ',' ','o','n','e',' ','h','a','l','f','-','w','i','n','d','o','w',' ','(','a','n','d',' ','s','e','t',' ','h','a','l','f','-','w','i','n','d','o','w',' ','t','o',' ','_','\b','N',')','.','\n',
+' ',' ','u',' ',' ','^','U',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','B','a','c','k','w','a','r','d',' ','o','n','e',' ','h','a','l','f','-','w','i','n','d','o','w',' ','(','a','n','d',' ','s','e','t',' ','h','a','l','f','-','w','i','n','d','o','w',' ','t','o',' ','_','\b','N',')','.','\n',
+' ',' ','E','S','C','-',')',' ',' ','R','i','g','h','t','A','r','r','o','w',' ','*',' ',' ','L','e','f','t',' ',' ','o','n','e',' ','h','a','l','f',' ','s','c','r','e','e','n',' ','w','i','d','t','h',' ','(','o','r',' ','_','\b','N',' ','p','o','s','i','t','i','o','n','s',')','.','\n',
+' ',' ','E','S','C','-','(',' ',' ','L','e','f','t','A','r','r','o','w',' ',' ','*',' ',' ','R','i','g','h','t',' ','o','n','e',' ','h','a','l','f',' ','s','c','r','e','e','n',' ','w','i','d','t','h',' ','(','o','r',' ','_','\b','N',' ','p','o','s','i','t','i','o','n','s',')','.','\n',
+' ',' ','F',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','F','o','r','w','a','r','d',' ','f','o','r','e','v','e','r',';',' ','l','i','k','e',' ','"','t','a','i','l',' ','-','f','"','.','\n',
+' ',' ','E','S','C','-','F',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','L','i','k','e',' ','F',' ','b','u','t',' ','s','t','o','p',' ','w','h','e','n',' ','s','e','a','r','c','h',' ','p','a','t','t','e','r','n',' ','i','s',' ','f','o','u','n','d','.','\n',
+' ',' ','r',' ',' ','^','R',' ',' ','^','L',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','R','e','p','a','i','n','t',' ','s','c','r','e','e','n','.','\n',
+' ',' ','R',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','R','e','p','a','i','n','t',' ','s','c','r','e','e','n',',',' ','d','i','s','c','a','r','d','i','n','g',' ','b','u','f','f','e','r','e','d',' ','i','n','p','u','t','.','\n',
+' ',' ',' ',' ',' ',' ',' ',' ','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','\n',
+' ',' ',' ',' ',' ',' ',' ',' ','D','e','f','a','u','l','t',' ','"','w','i','n','d','o','w','"',' ','i','s',' ','t','h','e',' ','s','c','r','e','e','n',' ','h','e','i','g','h','t','.','\n',
+' ',' ',' ',' ',' ',' ',' ',' ','D','e','f','a','u','l','t',' ','"','h','a','l','f','-','w','i','n','d','o','w','"',' ','i','s',' ','h','a','l','f',' ','o','f',' ','t','h','e',' ','s','c','r','e','e','n',' ','h','e','i','g','h','t','.','\n',
+' ','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','\n',
+'\n',
+' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','S','\b','S','E','\b','E','A','\b','A','R','\b','R','C','\b','C','H','\b','H','I','\b','I','N','\b','N','G','\b','G','\n',
+'\n',
+' ',' ','/','_','\b','p','_','\b','a','_','\b','t','_','\b','t','_','\b','e','_','\b','r','_','\b','n',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','S','e','a','r','c','h',' ','f','o','r','w','a','r','d',' ','f','o','r',' ','(','_','\b','N','-','t','h',')',' ','m','a','t','c','h','i','n','g',' ','l','i','n','e','.','\n',
+' ',' ','?','_','\b','p','_','\b','a','_','\b','t','_','\b','t','_','\b','e','_','\b','r','_','\b','n',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','S','e','a','r','c','h',' ','b','a','c','k','w','a','r','d',' ','f','o','r',' ','(','_','\b','N','-','t','h',')',' ','m','a','t','c','h','i','n','g',' ','l','i','n','e','.','\n',
+' ',' ','n',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','R','e','p','e','a','t',' ','p','r','e','v','i','o','u','s',' ','s','e','a','r','c','h',' ','(','f','o','r',' ','_','\b','N','-','t','h',' ','o','c','c','u','r','r','e','n','c','e',')','.','\n',
+' ',' ','N',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','R','e','p','e','a','t',' ','p','r','e','v','i','o','u','s',' ','s','e','a','r','c','h',' ','i','n',' ','r','e','v','e','r','s','e',' ','d','i','r','e','c','t','i','o','n','.','\n',
+' ',' ','E','S','C','-','n',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','R','e','p','e','a','t',' ','p','r','e','v','i','o','u','s',' ','s','e','a','r','c','h',',',' ','s','p','a','n','n','i','n','g',' ','f','i','l','e','s','.','\n',
+' ',' ','E','S','C','-','N',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','R','e','p','e','a','t',' ','p','r','e','v','i','o','u','s',' ','s','e','a','r','c','h',',',' ','r','e','v','e','r','s','e',' ','d','i','r','.',' ','&',' ','s','p','a','n','n','i','n','g',' ','f','i','l','e','s','.','\n',
+' ',' ','E','S','C','-','u',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','U','n','d','o',' ','(','t','o','g','g','l','e',')',' ','s','e','a','r','c','h',' ','h','i','g','h','l','i','g','h','t','i','n','g','.','\n',
+' ',' ','&','_','\b','p','_','\b','a','_','\b','t','_','\b','t','_','\b','e','_','\b','r','_','\b','n',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','*',' ',' ','D','i','s','p','l','a','y',' ','o','n','l','y',' ','m','a','t','c','h','i','n','g',' ','l','i','n','e','s','\n',
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+' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','D','o','n','\'','t',' ','d','i','s','p','l','a','y',' ','t','i','l','d','e','s',' ','a','f','t','e','r',' ','e','n','d',' ','o','f',' ','f','i','l','e','.','\n',
+' ',' ','-','#',' ','[','_','\b','N',']',' ',' ','.','.','.','.',' ',' ','-','-','s','h','i','f','t','=','[','_','\b','N',']','\n',
+' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','H','o','r','i','z','o','n','t','a','l',' ','s','c','r','o','l','l',' ','a','m','o','u','n','t',' ','(','0',' ','=',' ','o','n','e',' ','h','a','l','f',' ','s','c','r','e','e','n',' ','w','i','d','t','h',')','\n',
+' ',' ',' ',' ',' ',' ','.','.','.','.','.','.','.','.',' ',' ','-','-','n','o','-','k','e','y','p','a','d','\n',
+' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','D','o','n','\'','t',' ','s','e','n','d',' ','t','e','r','m','c','a','p',' ','k','e','y','p','a','d',' ','i','n','i','t','/','d','e','i','n','i','t',' ','s','t','r','i','n','g','s','.','\n',
+' ',' ',' ',' ',' ',' ','.','.','.','.','.','.','.','.',' ',' ','-','-','f','o','l','l','o','w','-','n','a','m','e','\n',
+' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','T','h','e',' ','F',' ','c','o','m','m','a','n','d',' ','c','h','a','n','g','e','s',' ','f','i','l','e','s',' ','i','f',' ','t','h','e',' ','i','n','p','u','t',' ','f','i','l','e',' ','i','s',' ','r','e','n','a','m','e','d','.','\n',
+' ',' ',' ',' ',' ',' ','.','.','.','.','.','.','.','.',' ',' ','-','-','u','s','e','-','b','a','c','k','s','l','a','s','h','\n',
+' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','S','u','b','s','e','q','u','e','n','t',' ','o','p','t','i','o','n','s',' ','u','s','e',' ','b','a','c','k','s','l','a','s','h',' ','a','s',' ','e','s','c','a','p','e',' ','c','h','a','r','.','\n',
+'\n',
+'\n',
+' ','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','-','\n',
+'\n',
+' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','L','\b','L','I','\b','I','N','\b','N','E','\b','E',' ','E','\b','E','D','\b','D','I','\b','I','T','\b','T','I','\b','I','N','\b','N','G','\b','G','\n',
+'\n',
+' ',' ',' ',' ',' ',' ',' ',' ','T','h','e','s','e',' ','k','e','y','s',' ','c','a','n',' ','b','e',' ','u','s','e','d',' ','t','o',' ','e','d','i','t',' ','t','e','x','t',' ','b','e','i','n','g',' ','e','n','t','e','r','e','d',' ','\n',
+' ',' ',' ',' ',' ',' ',' ',' ','o','n',' ','t','h','e',' ','"','c','o','m','m','a','n','d',' ','l','i','n','e','"',' ','a','t',' ','t','h','e',' ','b','o','t','t','o','m',' ','o','f',' ','t','h','e',' ','s','c','r','e','e','n','.','\n',
+'\n',
+' ','R','i','g','h','t','A','r','r','o','w',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','E','S','C','-','l',' ','.','.','.',' ','M','o','v','e',' ','c','u','r','s','o','r',' ','r','i','g','h','t',' ','o','n','e',' ','c','h','a','r','a','c','t','e','r','.','\n',
+' ','L','e','f','t','A','r','r','o','w',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','E','S','C','-','h',' ','.','.','.',' ','M','o','v','e',' ','c','u','r','s','o','r',' ','l','e','f','t',' ','o','n','e',' ','c','h','a','r','a','c','t','e','r','.','\n',
+' ','c','t','r','l','-','R','i','g','h','t','A','r','r','o','w',' ',' ','E','S','C','-','R','i','g','h','t','A','r','r','o','w',' ',' ','E','S','C','-','w',' ','.','.','.',' ','M','o','v','e',' ','c','u','r','s','o','r',' ','r','i','g','h','t',' ','o','n','e',' ','w','o','r','d','.','\n',
+' ','c','t','r','l','-','L','e','f','t','A','r','r','o','w',' ',' ',' ','E','S','C','-','L','e','f','t','A','r','r','o','w',' ',' ',' ','E','S','C','-','b',' ','.','.','.',' ','M','o','v','e',' ','c','u','r','s','o','r',' ','l','e','f','t',' ','o','n','e',' ','w','o','r','d','.','\n',
+' ','H','O','M','E',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','E','S','C','-','0',' ','.','.','.',' ','M','o','v','e',' ','c','u','r','s','o','r',' ','t','o',' ','s','t','a','r','t',' ','o','f',' ','l','i','n','e','.','\n',
+' ','E','N','D',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','E','S','C','-','$',' ','.','.','.',' ','M','o','v','e',' ','c','u','r','s','o','r',' ','t','o',' ','e','n','d',' ','o','f',' ','l','i','n','e','.','\n',
+' ','B','A','C','K','S','P','A','C','E',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','D','e','l','e','t','e',' ','c','h','a','r',' ','t','o',' ','l','e','f','t',' ','o','f',' ','c','u','r','s','o','r','.','\n',
+' ','D','E','L','E','T','E',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','E','S','C','-','x',' ','.','.','.',' ','D','e','l','e','t','e',' ','c','h','a','r',' ','u','n','d','e','r',' ','c','u','r','s','o','r','.','\n',
+' ','c','t','r','l','-','B','A','C','K','S','P','A','C','E',' ',' ',' ','E','S','C','-','B','A','C','K','S','P','A','C','E',' ','.','.','.','.','.','.','.','.','.','.','.',' ','D','e','l','e','t','e',' ','w','o','r','d',' ','t','o',' ','l','e','f','t',' ','o','f',' ','c','u','r','s','o','r','.','\n',
+' ','c','t','r','l','-','D','E','L','E','T','E',' ','.','.','.','.',' ','E','S','C','-','D','E','L','E','T','E',' ','.','.','.','.',' ','E','S','C','-','X',' ','.','.','.',' ','D','e','l','e','t','e',' ','w','o','r','d',' ','u','n','d','e','r',' ','c','u','r','s','o','r','.','\n',
+' ','c','t','r','l','-','U',' ','.','.','.','.','.','.','.','.','.',' ','E','S','C',' ','(','M','S','-','D','O','S',' ','o','n','l','y',')',' ','.','.','.','.','.','.','.',' ','D','e','l','e','t','e',' ','e','n','t','i','r','e',' ','l','i','n','e','.','\n',
+' ','U','p','A','r','r','o','w',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','E','S','C','-','k',' ','.','.','.',' ','R','e','t','r','i','e','v','e',' ','p','r','e','v','i','o','u','s',' ','c','o','m','m','a','n','d',' ','l','i','n','e','.','\n',
+' ','D','o','w','n','A','r','r','o','w',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','E','S','C','-','j',' ','.','.','.',' ','R','e','t','r','i','e','v','e',' ','n','e','x','t',' ','c','o','m','m','a','n','d',' ','l','i','n','e','.','\n',
+' ','T','A','B',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','C','o','m','p','l','e','t','e',' ','f','i','l','e','n','a','m','e',' ','&',' ','c','y','c','l','e','.','\n',
+' ','S','H','I','F','T','-','T','A','B',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','E','S','C','-','T','A','B',' ',' ',' ','C','o','m','p','l','e','t','e',' ','f','i','l','e','n','a','m','e',' ','&',' ','r','e','v','e','r','s','e',' ','c','y','c','l','e','.','\n',
+' ','c','t','r','l','-','L',' ','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.','.',' ','C','o','m','p','l','e','t','e',' ','f','i','l','e','n','a','m','e',',',' ','l','i','s','t',' ','a','l','l','.','\n',
+'\n',
+'\n',
+ 0 };
+constant int size_helpdata = sizeof(helpdata) - 1;
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * An IFILE represents an input file.
+ *
+ * It is actually a pointer to an ifile structure,
+ * but is opaque outside this module.
+ * Ifile structures are kept in a linked list in the order they
+ * appear on the command line.
+ * Any new file which does not already appear in the list is
+ * inserted after the current file.
+ */
+
+#include "less.h"
+
+extern IFILE curr_ifile;
+
+struct ifile {
+ struct ifile *h_next; /* Links for command line list */
+ struct ifile *h_prev;
+ char *h_filename; /* Name of the file */
+ void *h_filestate; /* File state (used in ch.c) */
+ int h_index; /* Index within command line list */
+ int h_hold; /* Hold count */
+ char h_opened; /* Has this ifile been opened? */
+ struct scrpos h_scrpos; /* Saved position within the file */
+};
+
+/*
+ * Convert an IFILE (external representation)
+ * to a struct file (internal representation), and vice versa.
+ */
+#define int_ifile(h) ((struct ifile *)(h))
+#define ext_ifile(h) ((IFILE)(h))
+
+/*
+ * Anchor for linked list.
+ */
+static struct ifile anchor = { &anchor, &anchor, NULL, NULL, 0, 0, '\0',
+ { NULL_POSITION, 0 } };
+static int ifiles = 0;
+
+ static void
+incr_index(p, incr)
+ register struct ifile *p;
+ int incr;
+{
+ for (; p != &anchor; p = p->h_next)
+ p->h_index += incr;
+}
+
+/*
+ * Link an ifile into the ifile list.
+ */
+ static void
+link_ifile(p, prev)
+ struct ifile *p;
+ struct ifile *prev;
+{
+ /*
+ * Link into list.
+ */
+ if (prev == NULL)
+ prev = &anchor;
+ p->h_next = prev->h_next;
+ p->h_prev = prev;
+ prev->h_next->h_prev = p;
+ prev->h_next = p;
+ /*
+ * Calculate index for the new one,
+ * and adjust the indexes for subsequent ifiles in the list.
+ */
+ p->h_index = prev->h_index + 1;
+ incr_index(p->h_next, 1);
+ ifiles++;
+}
+
+/*
+ * Unlink an ifile from the ifile list.
+ */
+ static void
+unlink_ifile(p)
+ struct ifile *p;
+{
+ p->h_next->h_prev = p->h_prev;
+ p->h_prev->h_next = p->h_next;
+ incr_index(p->h_next, -1);
+ ifiles--;
+}
+
+/*
+ * Allocate a new ifile structure and stick a filename in it.
+ * It should go after "prev" in the list
+ * (or at the beginning of the list if "prev" is NULL).
+ * Return a pointer to the new ifile structure.
+ */
+ static struct ifile *
+new_ifile(filename, prev)
+ char *filename;
+ struct ifile *prev;
+{
+ register struct ifile *p;
+
+ /*
+ * Allocate and initialize structure.
+ */
+ p = (struct ifile *) ecalloc(1, sizeof(struct ifile));
+ p->h_filename = save(filename);
+ p->h_scrpos.pos = NULL_POSITION;
+ p->h_opened = 0;
+ p->h_hold = 0;
+ p->h_filestate = NULL;
+ link_ifile(p, prev);
+ return (p);
+}
+
+/*
+ * Delete an existing ifile structure.
+ */
+ public void
+del_ifile(h)
+ IFILE h;
+{
+ register struct ifile *p;
+
+ if (h == NULL_IFILE)
+ return;
+ /*
+ * If the ifile we're deleting is the currently open ifile,
+ * move off it.
+ */
+ unmark(h);
+ if (h == curr_ifile)
+ curr_ifile = getoff_ifile(curr_ifile);
+ p = int_ifile(h);
+ unlink_ifile(p);
+ free(p->h_filename);
+ free(p);
+}
+
+/*
+ * Get the ifile after a given one in the list.
+ */
+ public IFILE
+next_ifile(h)
+ IFILE h;
+{
+ register struct ifile *p;
+
+ p = (h == NULL_IFILE) ? &anchor : int_ifile(h);
+ if (p->h_next == &anchor)
+ return (NULL_IFILE);
+ return (ext_ifile(p->h_next));
+}
+
+/*
+ * Get the ifile before a given one in the list.
+ */
+ public IFILE
+prev_ifile(h)
+ IFILE h;
+{
+ register struct ifile *p;
+
+ p = (h == NULL_IFILE) ? &anchor : int_ifile(h);
+ if (p->h_prev == &anchor)
+ return (NULL_IFILE);
+ return (ext_ifile(p->h_prev));
+}
+
+/*
+ * Return a different ifile from the given one.
+ */
+ public IFILE
+getoff_ifile(ifile)
+ IFILE ifile;
+{
+ IFILE newifile;
+
+ if ((newifile = prev_ifile(ifile)) != NULL_IFILE)
+ return (newifile);
+ if ((newifile = next_ifile(ifile)) != NULL_IFILE)
+ return (newifile);
+ return (NULL_IFILE);
+}
+
+/*
+ * Return the number of ifiles.
+ */
+ public int
+nifile()
+{
+ return (ifiles);
+}
+
+/*
+ * Find an ifile structure, given a filename.
+ */
+ static struct ifile *
+find_ifile(filename)
+ char *filename;
+{
+ register struct ifile *p;
+
+ for (p = anchor.h_next; p != &anchor; p = p->h_next)
+ if (strcmp(filename, p->h_filename) == 0)
+ return (p);
+ return (NULL);
+}
+
+/*
+ * Get the ifile associated with a filename.
+ * If the filename has not been seen before,
+ * insert the new ifile after "prev" in the list.
+ */
+ public IFILE
+get_ifile(filename, prev)
+ char *filename;
+ IFILE prev;
+{
+ register struct ifile *p;
+
+ if ((p = find_ifile(filename)) == NULL)
+ p = new_ifile(filename, int_ifile(prev));
+ return (ext_ifile(p));
+}
+
+/*
+ * Get the filename associated with a ifile.
+ */
+ public char *
+get_filename(ifile)
+ IFILE ifile;
+{
+ if (ifile == NULL)
+ return (NULL);
+ return (int_ifile(ifile)->h_filename);
+}
+
+/*
+ * Get the index of the file associated with a ifile.
+ */
+ public int
+get_index(ifile)
+ IFILE ifile;
+{
+ return (int_ifile(ifile)->h_index);
+}
+
+/*
+ * Save the file position to be associated with a given file.
+ */
+ public void
+store_pos(ifile, scrpos)
+ IFILE ifile;
+ struct scrpos *scrpos;
+{
+ int_ifile(ifile)->h_scrpos = *scrpos;
+}
+
+/*
+ * Recall the file position associated with a file.
+ * If no position has been associated with the file, return NULL_POSITION.
+ */
+ public void
+get_pos(ifile, scrpos)
+ IFILE ifile;
+ struct scrpos *scrpos;
+{
+ *scrpos = int_ifile(ifile)->h_scrpos;
+}
+
+/*
+ * Mark the ifile as "opened".
+ */
+ public void
+set_open(ifile)
+ IFILE ifile;
+{
+ int_ifile(ifile)->h_opened = 1;
+}
+
+/*
+ * Return whether the ifile has been opened previously.
+ */
+ public int
+opened(ifile)
+ IFILE ifile;
+{
+ return (int_ifile(ifile)->h_opened);
+}
+
+ public void
+hold_ifile(ifile, incr)
+ IFILE ifile;
+ int incr;
+{
+ int_ifile(ifile)->h_hold += incr;
+}
+
+ public int
+held_ifile(ifile)
+ IFILE ifile;
+{
+ return (int_ifile(ifile)->h_hold);
+}
+
+ public void *
+get_filestate(ifile)
+ IFILE ifile;
+{
+ return (int_ifile(ifile)->h_filestate);
+}
+
+ public void
+set_filestate(ifile, filestate)
+ IFILE ifile;
+ void *filestate;
+{
+ int_ifile(ifile)->h_filestate = filestate;
+}
+
+#if 0
+ public void
+if_dump()
+{
+ register struct ifile *p;
+
+ for (p = anchor.h_next; p != &anchor; p = p->h_next)
+ {
+ printf("%x: %d. <%s> pos %d,%x\n",
+ p, p->h_index, p->h_filename,
+ p->h_scrpos.ln, p->h_scrpos.pos);
+ ch_dump(p->h_filestate);
+ }
+}
+#endif
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * High level routines dealing with getting lines of input
+ * from the file being viewed.
+ *
+ * When we speak of "lines" here, we mean PRINTABLE lines;
+ * lines processed with respect to the screen width.
+ * We use the term "raw line" to refer to lines simply
+ * delimited by newlines; not processed with respect to screen width.
+ */
+
+#include "less.h"
+
+extern int squeeze;
+extern int chopline;
+extern int hshift;
+extern int quit_if_one_screen;
+extern int sigs;
+extern int ignore_eoi;
+extern int status_col;
+extern POSITION start_attnpos;
+extern POSITION end_attnpos;
+#if HILITE_SEARCH
+extern int hilite_search;
+extern int size_linebuf;
+#endif
+
+/*
+ * Get the next line.
+ * A "current" position is passed and a "new" position is returned.
+ * The current position is the position of the first character of
+ * a line. The new position is the position of the first character
+ * of the NEXT line. The line obtained is the line starting at curr_pos.
+ */
+ public POSITION
+forw_line(curr_pos)
+ POSITION curr_pos;
+{
+ POSITION base_pos;
+ POSITION new_pos;
+ register int c;
+ int blankline;
+ int endline;
+ int backchars;
+
+get_forw_line:
+ if (curr_pos == NULL_POSITION)
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+#if HILITE_SEARCH
+ if (hilite_search == OPT_ONPLUS || is_filtering() || status_col)
+ {
+ /*
+ * If we are ignoring EOI (command F), only prepare
+ * one line ahead, to avoid getting stuck waiting for
+ * slow data without displaying the data we already have.
+ * If we're not ignoring EOI, we *could* do the same, but
+ * for efficiency we prepare several lines ahead at once.
+ */
+ prep_hilite(curr_pos, curr_pos + 3*size_linebuf,
+ ignore_eoi ? 1 : -1);
+ curr_pos = next_unfiltered(curr_pos);
+ }
+#endif
+ if (ch_seek(curr_pos))
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+
+ /*
+ * Step back to the beginning of the line.
+ */
+ base_pos = curr_pos;
+ for (;;)
+ {
+ if (ABORT_SIGS())
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ c = ch_back_get();
+ if (c == EOI)
+ break;
+ if (c == '\n')
+ {
+ (void) ch_forw_get();
+ break;
+ }
+ --base_pos;
+ }
+
+ /*
+ * Read forward again to the position we should start at.
+ */
+ prewind();
+ plinenum(base_pos);
+ (void) ch_seek(base_pos);
+ new_pos = base_pos;
+ while (new_pos < curr_pos)
+ {
+ if (ABORT_SIGS())
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ c = ch_forw_get();
+ backchars = pappend(c, new_pos);
+ new_pos++;
+ if (backchars > 0)
+ {
+ pshift_all();
+ new_pos -= backchars;
+ while (--backchars >= 0)
+ (void) ch_back_get();
+ }
+ }
+ (void) pflushmbc();
+ pshift_all();
+
+ /*
+ * Read the first character to display.
+ */
+ c = ch_forw_get();
+ if (c == EOI)
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ blankline = (c == '\n' || c == '\r');
+
+ /*
+ * Read each character in the line and append to the line buffer.
+ */
+ for (;;)
+ {
+ if (ABORT_SIGS())
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ if (c == '\n' || c == EOI)
+ {
+ /*
+ * End of the line.
+ */
+ backchars = pflushmbc();
+ new_pos = ch_tell();
+ if (backchars > 0 && !chopline && hshift == 0)
+ {
+ new_pos -= backchars + 1;
+ endline = FALSE;
+ } else
+ endline = TRUE;
+ break;
+ }
+ if (c != '\r')
+ blankline = 0;
+
+ /*
+ * Append the char to the line and get the next char.
+ */
+ backchars = pappend(c, ch_tell()-1);
+ if (backchars > 0)
+ {
+ /*
+ * The char won't fit in the line; the line
+ * is too long to print in the screen width.
+ * End the line here.
+ */
+ if (chopline || hshift > 0)
+ {
+ do
+ {
+ if (ABORT_SIGS())
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ c = ch_forw_get();
+ } while (c != '\n' && c != EOI);
+ new_pos = ch_tell();
+ endline = TRUE;
+ quit_if_one_screen = FALSE;
+ } else
+ {
+ new_pos = ch_tell() - backchars;
+ endline = FALSE;
+ }
+ break;
+ }
+ c = ch_forw_get();
+ }
+
+ pdone(endline, 1);
+
+#if HILITE_SEARCH
+ if (is_filtered(base_pos))
+ {
+ /*
+ * We don't want to display this line.
+ * Get the next line.
+ */
+ curr_pos = new_pos;
+ goto get_forw_line;
+ }
+
+ if (status_col && is_hilited(base_pos, ch_tell()-1, 1, NULL))
+ set_status_col('*');
+#endif
+
+ if (squeeze && blankline)
+ {
+ /*
+ * This line is blank.
+ * Skip down to the last contiguous blank line
+ * and pretend it is the one which we are returning.
+ */
+ while ((c = ch_forw_get()) == '\n' || c == '\r')
+ if (ABORT_SIGS())
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ if (c != EOI)
+ (void) ch_back_get();
+ new_pos = ch_tell();
+ }
+
+ return (new_pos);
+}
+
+/*
+ * Get the previous line.
+ * A "current" position is passed and a "new" position is returned.
+ * The current position is the position of the first character of
+ * a line. The new position is the position of the first character
+ * of the PREVIOUS line. The line obtained is the one starting at new_pos.
+ */
+ public POSITION
+back_line(curr_pos)
+ POSITION curr_pos;
+{
+ POSITION new_pos, begin_new_pos, base_pos;
+ int c;
+ int endline;
+ int backchars;
+
+get_back_line:
+ if (curr_pos == NULL_POSITION || curr_pos <= ch_zero())
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+#if HILITE_SEARCH
+ if (hilite_search == OPT_ONPLUS || is_filtering() || status_col)
+ prep_hilite((curr_pos < 3*size_linebuf) ?
+ 0 : curr_pos - 3*size_linebuf, curr_pos, -1);
+#endif
+ if (ch_seek(curr_pos-1))
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+
+ if (squeeze)
+ {
+ /*
+ * Find out if the "current" line was blank.
+ */
+ (void) ch_forw_get(); /* Skip the newline */
+ c = ch_forw_get(); /* First char of "current" line */
+ (void) ch_back_get(); /* Restore our position */
+ (void) ch_back_get();
+
+ if (c == '\n' || c == '\r')
+ {
+ /*
+ * The "current" line was blank.
+ * Skip over any preceding blank lines,
+ * since we skipped them in forw_line().
+ */
+ while ((c = ch_back_get()) == '\n' || c == '\r')
+ if (ABORT_SIGS())
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ if (c == EOI)
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ (void) ch_forw_get();
+ }
+ }
+
+ /*
+ * Scan backwards until we hit the beginning of the line.
+ */
+ for (;;)
+ {
+ if (ABORT_SIGS())
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ c = ch_back_get();
+ if (c == '\n')
+ {
+ /*
+ * This is the newline ending the previous line.
+ * We have hit the beginning of the line.
+ */
+ base_pos = ch_tell() + 1;
+ break;
+ }
+ if (c == EOI)
+ {
+ /*
+ * We have hit the beginning of the file.
+ * This must be the first line in the file.
+ * This must, of course, be the beginning of the line.
+ */
+ base_pos = ch_tell();
+ break;
+ }
+ }
+
+ /*
+ * Now scan forwards from the beginning of this line.
+ * We keep discarding "printable lines" (based on screen width)
+ * until we reach the curr_pos.
+ *
+ * {{ This algorithm is pretty inefficient if the lines
+ * are much longer than the screen width,
+ * but I don't know of any better way. }}
+ */
+ new_pos = base_pos;
+ if (ch_seek(new_pos))
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ endline = FALSE;
+ prewind();
+ plinenum(new_pos);
+ loop:
+ begin_new_pos = new_pos;
+ (void) ch_seek(new_pos);
+
+ do
+ {
+ c = ch_forw_get();
+ if (c == EOI || ABORT_SIGS())
+ {
+ null_line();
+ return (NULL_POSITION);
+ }
+ new_pos++;
+ if (c == '\n')
+ {
+ backchars = pflushmbc();
+ if (backchars > 0 && !chopline && hshift == 0)
+ {
+ backchars++;
+ goto shift;
+ }
+ endline = TRUE;
+ break;
+ }
+ backchars = pappend(c, ch_tell()-1);
+ if (backchars > 0)
+ {
+ /*
+ * Got a full printable line, but we haven't
+ * reached our curr_pos yet. Discard the line
+ * and start a new one.
+ */
+ if (chopline || hshift > 0)
+ {
+ endline = TRUE;
+ quit_if_one_screen = FALSE;
+ break;
+ }
+ shift:
+ pshift_all();
+ while (backchars-- > 0)
+ {
+ (void) ch_back_get();
+ new_pos--;
+ }
+ goto loop;
+ }
+ } while (new_pos < curr_pos);
+
+ pdone(endline, 0);
+
+#if HILITE_SEARCH
+ if (is_filtered(base_pos))
+ {
+ /*
+ * We don't want to display this line.
+ * Get the previous line.
+ */
+ curr_pos = begin_new_pos;
+ goto get_back_line;
+ }
+
+ if (status_col && curr_pos > 0 && is_hilited(base_pos, curr_pos-1, 1, NULL))
+ set_status_col('*');
+#endif
+
+ return (begin_new_pos);
+}
+
+/*
+ * Set attnpos.
+ */
+ public void
+set_attnpos(pos)
+ POSITION pos;
+{
+ int c;
+
+ if (pos != NULL_POSITION)
+ {
+ if (ch_seek(pos))
+ return;
+ for (;;)
+ {
+ c = ch_forw_get();
+ if (c == EOI)
+ break;
+ if (c == '\n' || c == '\r')
+ {
+ (void) ch_back_get();
+ break;
+ }
+ pos++;
+ }
+ end_attnpos = pos;
+ for (;;)
+ {
+ c = ch_back_get();
+ if (c == EOI || c == '\n' || c == '\r')
+ break;
+ pos--;
+ }
+ }
+ start_attnpos = pos;
+}
--- /dev/null
+#!/bin/sh
+
+#
+# install - install a program, script, or datafile
+# This comes from X11R5; it is not part of GNU.
+#
+# $XConsortium: install.sh,v 1.2 89/12/18 14:47:22 jim Exp $
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.
+#
+
+
+# set DOITPROG to echo to test this script
+
+# Don't use :- since 4.3BSD and earlier shells don't like it.
+doit="${DOITPROG-}"
+
+
+# put in absolute paths if you don't have them in your path; or use env. vars.
+
+mvprog="${MVPROG-mv}"
+cpprog="${CPPROG-cp}"
+chmodprog="${CHMODPROG-chmod}"
+chownprog="${CHOWNPROG-chown}"
+chgrpprog="${CHGRPPROG-chgrp}"
+stripprog="${STRIPPROG-strip}"
+rmprog="${RMPROG-rm}"
+
+instcmd="$mvprog"
+chmodcmd=""
+chowncmd=""
+chgrpcmd=""
+stripcmd=""
+rmcmd="$rmprog -f"
+mvcmd="$mvprog"
+src=""
+dst=""
+
+while [ x"$1" != x ]; do
+ case $1 in
+ -c) instcmd="$cpprog"
+ shift
+ continue;;
+
+ -m) chmodcmd="$chmodprog $2"
+ shift
+ shift
+ continue;;
+
+ -o) chowncmd="$chownprog $2"
+ shift
+ shift
+ continue;;
+
+ -g) chgrpcmd="$chgrpprog $2"
+ shift
+ shift
+ continue;;
+
+ -s) stripcmd="$stripprog"
+ shift
+ continue;;
+
+ *) if [ x"$src" = x ]
+ then
+ src=$1
+ else
+ dst=$1
+ fi
+ shift
+ continue;;
+ esac
+done
+
+if [ x"$src" = x ]
+then
+ echo "install: no input file specified"
+ exit 1
+fi
+
+if [ x"$dst" = x ]
+then
+ echo "install: no destination specified"
+ exit 1
+fi
+
+
+# If destination is a directory, append the input filename; if your system
+# does not like double slashes in filenames, you may need to add some logic
+
+if [ -d $dst ]
+then
+ dst="$dst"/`basename $src`
+fi
+
+# Make a temp file name in the proper directory.
+
+dstdir=`dirname $dst`
+dsttmp=$dstdir/_inst.$$_
+
+# Move or copy the file name to the temp name
+
+$doit $instcmd $src $dsttmp
+
+# and set any options; do chmod last to preserve setuid bits
+
+if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; fi
+if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; fi
+if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; fi
+if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; fi
+
+# Now rename the file to the real destination.
+
+$doit $rmcmd $dst
+$doit $mvcmd $dsttmp $dst
+
+
+exit 0
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines which jump to a new location in the file.
+ */
+
+#include "less.h"
+#include "position.h"
+
+extern int jump_sline;
+extern int squished;
+extern int screen_trashed;
+extern int sc_width, sc_height;
+extern int show_attn;
+extern int top_scroll;
+
+/*
+ * Jump to the end of the file.
+ */
+ public void
+jump_forw()
+{
+ POSITION pos;
+ POSITION end_pos;
+
+ if (ch_end_seek())
+ {
+ error("Cannot seek to end of file", NULL_PARG);
+ return;
+ }
+ /*
+ * Note; lastmark will be called later by jump_loc, but it fails
+ * because the position table has been cleared by pos_clear below.
+ * So call it here before calling pos_clear.
+ */
+ lastmark();
+ /*
+ * Position the last line in the file at the last screen line.
+ * Go back one line from the end of the file
+ * to get to the beginning of the last line.
+ */
+ pos_clear();
+ end_pos = ch_tell();
+ pos = back_line(end_pos);
+ if (pos == NULL_POSITION)
+ jump_loc((POSITION)0, sc_height-1);
+ else
+ {
+ jump_loc(pos, sc_height-1);
+ if (position(sc_height-1) != end_pos)
+ repaint();
+ }
+}
+
+/*
+ * Jump to the last buffered line in the file.
+ */
+ public void
+jump_forw_buffered()
+{
+ POSITION end;
+
+ if (ch_end_buffer_seek())
+ {
+ error("Cannot seek to end of buffers", NULL_PARG);
+ return;
+ }
+ end = ch_tell();
+ if (end != NULL_POSITION && end > 0)
+ jump_line_loc(end-1, sc_height-1);
+}
+
+/*
+ * Jump to line n in the file.
+ */
+ public void
+jump_back(linenum)
+ LINENUM linenum;
+{
+ POSITION pos;
+ PARG parg;
+
+ /*
+ * Find the position of the specified line.
+ * If we can seek there, just jump to it.
+ * If we can't seek, but we're trying to go to line number 1,
+ * use ch_beg_seek() to get as close as we can.
+ */
+ pos = find_pos(linenum);
+ if (pos != NULL_POSITION && ch_seek(pos) == 0)
+ {
+ if (show_attn)
+ set_attnpos(pos);
+ jump_loc(pos, jump_sline);
+ } else if (linenum <= 1 && ch_beg_seek() == 0)
+ {
+ jump_loc(ch_tell(), jump_sline);
+ error("Cannot seek to beginning of file", NULL_PARG);
+ } else
+ {
+ parg.p_linenum = linenum;
+ error("Cannot seek to line number %n", &parg);
+ }
+}
+
+/*
+ * Repaint the screen.
+ */
+ public void
+repaint()
+{
+ struct scrpos scrpos;
+ /*
+ * Start at the line currently at the top of the screen
+ * and redisplay the screen.
+ */
+ get_scrpos(&scrpos);
+ pos_clear();
+ jump_loc(scrpos.pos, scrpos.ln);
+}
+
+/*
+ * Jump to a specified percentage into the file.
+ */
+ public void
+jump_percent(percent, fraction)
+ int percent;
+ long fraction;
+{
+ POSITION pos, len;
+
+ /*
+ * Determine the position in the file
+ * (the specified percentage of the file's length).
+ */
+ if ((len = ch_length()) == NULL_POSITION)
+ {
+ ierror("Determining length of file", NULL_PARG);
+ ch_end_seek();
+ }
+ if ((len = ch_length()) == NULL_POSITION)
+ {
+ error("Don't know length of file", NULL_PARG);
+ return;
+ }
+ pos = percent_pos(len, percent, fraction);
+ if (pos >= len)
+ pos = len-1;
+
+ jump_line_loc(pos, jump_sline);
+}
+
+/*
+ * Jump to a specified position in the file.
+ * Like jump_loc, but the position need not be
+ * the first character in a line.
+ */
+ public void
+jump_line_loc(pos, sline)
+ POSITION pos;
+ int sline;
+{
+ int c;
+
+ if (ch_seek(pos) == 0)
+ {
+ /*
+ * Back up to the beginning of the line.
+ */
+ while ((c = ch_back_get()) != '\n' && c != EOI)
+ ;
+ if (c == '\n')
+ (void) ch_forw_get();
+ pos = ch_tell();
+ }
+ if (show_attn)
+ set_attnpos(pos);
+ jump_loc(pos, sline);
+}
+
+/*
+ * Jump to a specified position in the file.
+ * The position must be the first character in a line.
+ * Place the target line on a specified line on the screen.
+ */
+ public void
+jump_loc(pos, sline)
+ POSITION pos;
+ int sline;
+{
+ register int nline;
+ POSITION tpos;
+ POSITION bpos;
+
+ /*
+ * Normalize sline.
+ */
+ sline = adjsline(sline);
+
+ if ((nline = onscreen(pos)) >= 0)
+ {
+ /*
+ * The line is currently displayed.
+ * Just scroll there.
+ */
+ nline -= sline;
+ if (nline > 0)
+ forw(nline, position(BOTTOM_PLUS_ONE), 1, 0, 0);
+ else
+ back(-nline, position(TOP), 1, 0);
+#if HILITE_SEARCH
+ if (show_attn)
+ repaint_hilite(1);
+#endif
+ return;
+ }
+
+ /*
+ * Line is not on screen.
+ * Seek to the desired location.
+ */
+ if (ch_seek(pos))
+ {
+ error("Cannot seek to that file position", NULL_PARG);
+ return;
+ }
+
+ /*
+ * See if the desired line is before or after
+ * the currently displayed screen.
+ */
+ tpos = position(TOP);
+ bpos = position(BOTTOM_PLUS_ONE);
+ if (tpos == NULL_POSITION || pos >= tpos)
+ {
+ /*
+ * The desired line is after the current screen.
+ * Move back in the file far enough so that we can
+ * call forw() and put the desired line at the
+ * sline-th line on the screen.
+ */
+ for (nline = 0; nline < sline; nline++)
+ {
+ if (bpos != NULL_POSITION && pos <= bpos)
+ {
+ /*
+ * Surprise! The desired line is
+ * close enough to the current screen
+ * that we can just scroll there after all.
+ */
+ forw(sc_height-sline+nline-1, bpos, 1, 0, 0);
+#if HILITE_SEARCH
+ if (show_attn)
+ repaint_hilite(1);
+#endif
+ return;
+ }
+ pos = back_line(pos);
+ if (pos == NULL_POSITION)
+ {
+ /*
+ * Oops. Ran into the beginning of the file.
+ * Exit the loop here and rely on forw()
+ * below to draw the required number of
+ * blank lines at the top of the screen.
+ */
+ break;
+ }
+ }
+ lastmark();
+ squished = 0;
+ screen_trashed = 0;
+ forw(sc_height-1, pos, 1, 0, sline-nline);
+ } else
+ {
+ /*
+ * The desired line is before the current screen.
+ * Move forward in the file far enough so that we
+ * can call back() and put the desired line at the
+ * sline-th line on the screen.
+ */
+ for (nline = sline; nline < sc_height - 1; nline++)
+ {
+ pos = forw_line(pos);
+ if (pos == NULL_POSITION)
+ {
+ /*
+ * Ran into end of file.
+ * This shouldn't normally happen,
+ * but may if there is some kind of read error.
+ */
+ break;
+ }
+#if HILITE_SEARCH
+ pos = next_unfiltered(pos);
+#endif
+ if (pos >= tpos)
+ {
+ /*
+ * Surprise! The desired line is
+ * close enough to the current screen
+ * that we can just scroll there after all.
+ */
+ back(nline+1, tpos, 1, 0);
+#if HILITE_SEARCH
+ if (show_attn)
+ repaint_hilite(1);
+#endif
+ return;
+ }
+ }
+ lastmark();
+ if (!top_scroll)
+ clear();
+ else
+ home();
+ screen_trashed = 0;
+ add_back_pos(pos);
+ back(sc_height-1, pos, 1, 0);
+ }
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+#define NEWBOT 1
+
+/*
+ * Standard include file for "less".
+ */
+
+/*
+ * Defines for MSDOS_COMPILER.
+ */
+#define MSOFTC 1 /* Microsoft C */
+#define BORLANDC 2 /* Borland C */
+#define WIN32C 3 /* Windows (Borland C or Microsoft C) */
+#define DJGPPC 4 /* DJGPP C */
+
+/*
+ * Include the file of compile-time options.
+ * The <> make cc search for it in -I., not srcdir.
+ */
+#include <defines.h>
+
+#ifdef _SEQUENT_
+/*
+ * Kludge for Sequent Dynix systems that have sigsetmask, but
+ * it's not compatible with the way less calls it.
+ * {{ Do other systems need this? }}
+ */
+#undef HAVE_SIGSETMASK
+#endif
+
+/*
+ * Language details.
+ */
+#if HAVE_VOID
+#define VOID_POINTER void *
+#else
+#define VOID_POINTER char *
+#define void int
+#endif
+#if HAVE_CONST
+#define constant const
+#else
+#define constant
+#endif
+
+#define public /* PUBLIC FUNCTION */
+
+/* Library function declarations */
+
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#if HAVE_STDIO_H
+#include <stdio.h>
+#endif
+#if HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_CTYPE_H
+#include <ctype.h>
+#endif
+#if HAVE_WCTYPE_H
+#include <wctype.h>
+#endif
+#if HAVE_LIMITS_H
+#include <limits.h>
+#endif
+#if HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+
+/* OS-specific includes */
+#ifdef _OSK
+#include <modes.h>
+#include <strings.h>
+#endif
+
+#ifdef __TANDEM
+#include <floss.h>
+#endif
+
+#if MSDOS_COMPILER==WIN32C || OS2
+#include <io.h>
+#endif
+
+#if MSDOS_COMPILER==DJGPPC
+#include <io.h>
+#include <sys/exceptn.h>
+#include <conio.h>
+#include <pc.h>
+#endif
+
+#if !HAVE_STDLIB_H
+char *getenv();
+off_t lseek();
+VOID_POINTER calloc();
+void free();
+#endif
+
+/*
+ * Simple lowercase test which can be used during option processing
+ * (before options are parsed which might tell us what charset to use).
+ */
+#define ASCII_IS_UPPER(c) ((c) >= 'A' && (c) <= 'Z')
+#define ASCII_IS_LOWER(c) ((c) >= 'a' && (c) <= 'z')
+#define ASCII_TO_UPPER(c) ((c) - 'a' + 'A')
+#define ASCII_TO_LOWER(c) ((c) - 'A' + 'a')
+
+#undef IS_UPPER
+#undef IS_LOWER
+#undef TO_UPPER
+#undef TO_LOWER
+#undef IS_SPACE
+#undef IS_DIGIT
+
+#if HAVE_WCTYPE
+#define IS_UPPER(c) iswupper(c)
+#define IS_LOWER(c) iswlower(c)
+#define TO_UPPER(c) towupper(c)
+#define TO_LOWER(c) towlower(c)
+#else
+#if HAVE_UPPER_LOWER
+#define IS_UPPER(c) isupper((unsigned char) (c))
+#define IS_LOWER(c) islower((unsigned char) (c))
+#define TO_UPPER(c) toupper((unsigned char) (c))
+#define TO_LOWER(c) tolower((unsigned char) (c))
+#else
+#define IS_UPPER(c) ASCII_IS_UPPER(c)
+#define IS_LOWER(c) ASCII_IS_LOWER(c)
+#define TO_UPPER(c) ASCII_TO_UPPER(c)
+#define TO_LOWER(c) ASCII_TO_LOWER(c)
+#endif
+#endif
+
+#ifdef isspace
+#define IS_SPACE(c) isspace((unsigned char)(c))
+#else
+#define IS_SPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\n' || (c) == '\r' || (c) == '\f')
+#endif
+
+#ifdef isdigit
+#define IS_DIGIT(c) isdigit((unsigned char)(c))
+#else
+#define IS_DIGIT(c) ((c) >= '0' && (c) <= '9')
+#endif
+
+#define IS_CSI_START(c) (((LWCHAR)(c)) == ESC || (((LWCHAR)(c)) == CSI))
+
+#ifndef NULL
+#define NULL 0
+#endif
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#define OPT_OFF 0
+#define OPT_ON 1
+#define OPT_ONPLUS 2
+
+#if !HAVE_MEMCPY
+#ifndef memcpy
+#define memcpy(to,from,len) bcopy((from),(to),(len))
+#endif
+#endif
+
+#if HAVE_SNPRINTF
+#define SNPRINTF1(str, size, fmt, v1) snprintf((str), (size), (fmt), (v1))
+#define SNPRINTF2(str, size, fmt, v1, v2) snprintf((str), (size), (fmt), (v1), (v2))
+#define SNPRINTF3(str, size, fmt, v1, v2, v3) snprintf((str), (size), (fmt), (v1), (v2), (v3))
+#define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) snprintf((str), (size), (fmt), (v1), (v2), (v3), (v4))
+#else
+/* Use unsafe sprintf if we don't have snprintf. */
+#define SNPRINTF1(str, size, fmt, v1) sprintf((str), (fmt), (v1))
+#define SNPRINTF2(str, size, fmt, v1, v2) sprintf((str), (fmt), (v1), (v2))
+#define SNPRINTF3(str, size, fmt, v1, v2, v3) sprintf((str), (fmt), (v1), (v2), (v3))
+#define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) sprintf((str), (fmt), (v1), (v2), (v3), (v4))
+#endif
+
+#define BAD_LSEEK ((off_t)-1)
+
+#ifndef SEEK_SET
+#define SEEK_SET 0
+#endif
+#ifndef SEEK_END
+#define SEEK_END 2
+#endif
+
+#ifndef CHAR_BIT
+#define CHAR_BIT 8
+#endif
+
+/*
+ * Upper bound on the string length of an integer converted to string.
+ * 302 / 1000 is ceil (log10 (2.0)). Subtract 1 for the sign bit;
+ * add 1 for integer division truncation; add 1 more for a minus sign.
+ */
+#define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1)
+
+/*
+ * Special types and constants.
+ */
+typedef unsigned long LWCHAR;
+typedef off_t POSITION;
+typedef off_t LINENUM;
+#define MIN_LINENUM_WIDTH 7 /* Min printing width of a line number */
+#define MAX_UTF_CHAR_LEN 6 /* Max bytes in one UTF-8 char */
+
+#define NULL_POSITION ((POSITION)(-1))
+
+/*
+ * Flags for open()
+ */
+#if MSDOS_COMPILER || OS2
+#define OPEN_READ (O_RDONLY|O_BINARY)
+#else
+#ifdef _OSK
+#define OPEN_READ (S_IREAD)
+#else
+#ifdef O_RDONLY
+#define OPEN_READ (O_RDONLY)
+#else
+#define OPEN_READ (0)
+#endif
+#endif
+#endif
+
+#if defined(O_WRONLY) && defined(O_APPEND)
+#define OPEN_APPEND (O_APPEND|O_WRONLY)
+#else
+#ifdef _OSK
+#define OPEN_APPEND (S_IWRITE)
+#else
+#define OPEN_APPEND (1)
+#endif
+#endif
+
+/*
+ * Set a file descriptor to binary mode.
+ */
+#if MSDOS_COMPILER==MSOFTC
+#define SET_BINARY(f) _setmode(f, _O_BINARY);
+#else
+#if MSDOS_COMPILER || OS2
+#define SET_BINARY(f) setmode(f, O_BINARY)
+#else
+#define SET_BINARY(f)
+#endif
+#endif
+
+/*
+ * Does the shell treat "?" as a metacharacter?
+ */
+#if MSDOS_COMPILER || OS2 || _OSK
+#define SHELL_META_QUEST 0
+#else
+#define SHELL_META_QUEST 1
+#endif
+
+#define SPACES_IN_FILENAMES 1
+
+/*
+ * An IFILE represents an input file.
+ */
+#define IFILE VOID_POINTER
+#define NULL_IFILE ((IFILE)NULL)
+
+/*
+ * The structure used to represent a "screen position".
+ * This consists of a file position, and a screen line number.
+ * The meaning is that the line starting at the given file
+ * position is displayed on the ln-th line of the screen.
+ * (Screen lines before ln are empty.)
+ */
+struct scrpos
+{
+ POSITION pos;
+ int ln;
+};
+
+/*
+ * A mark is an ifile (input file) plus a position within the file.
+ */
+struct mark
+{
+ IFILE m_ifile;
+ struct scrpos m_scrpos;
+};
+
+typedef union parg
+{
+ char *p_string;
+ int p_int;
+ LINENUM p_linenum;
+} PARG;
+
+#define NULL_PARG ((PARG *)NULL)
+
+struct textlist
+{
+ char *string;
+ char *endstring;
+};
+
+struct wchar_range
+{
+ LWCHAR first, last;
+};
+
+struct wchar_range_table
+{
+ struct wchar_range *table;
+ int count;
+};
+
+#define EOI (-1)
+
+#define READ_INTR (-2)
+
+/* A fraction is represented by an int n; the fraction is n/NUM_FRAC_DENOM */
+#define NUM_FRAC_DENOM 1000000
+#define NUM_LOG_FRAC_DENOM 6
+
+/* How quiet should we be? */
+#define NOT_QUIET 0 /* Ring bell at eof and for errors */
+#define LITTLE_QUIET 1 /* Ring bell only for errors */
+#define VERY_QUIET 2 /* Never ring bell */
+
+/* How should we prompt? */
+#define PR_SHORT 0 /* Prompt with colon */
+#define PR_MEDIUM 1 /* Prompt with message */
+#define PR_LONG 2 /* Prompt with longer message */
+
+/* How should we handle backspaces? */
+#define BS_SPECIAL 0 /* Do special things for underlining and bold */
+#define BS_NORMAL 1 /* \b treated as normal char; actually output */
+#define BS_CONTROL 2 /* \b treated as control char; prints as ^H */
+
+/* How should we search? */
+#define SRCH_FORW (1 << 0) /* Search forward from current position */
+#define SRCH_BACK (1 << 1) /* Search backward from current position */
+#define SRCH_NO_MOVE (1 << 2) /* Highlight, but don't move */
+#define SRCH_FIND_ALL (1 << 4) /* Find and highlight all matches */
+#define SRCH_NO_MATCH (1 << 8) /* Search for non-matching lines */
+#define SRCH_PAST_EOF (1 << 9) /* Search past end-of-file, into next file */
+#define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */
+#define SRCH_NO_REGEX (1 << 12) /* Don't use regular expressions */
+#define SRCH_FILTER (1 << 13) /* Search is for '&' (filter) command */
+#define SRCH_AFTER_TARGET (1 << 14) /* Start search after the target line */
+
+#define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \
+ (((t) & ~SRCH_FORW) | SRCH_BACK) : \
+ (((t) & ~SRCH_BACK) | SRCH_FORW))
+
+/* */
+#define NO_MCA 0
+#define MCA_DONE 1
+#define MCA_MORE 2
+
+#define CC_OK 0 /* Char was accepted & processed */
+#define CC_QUIT 1 /* Char was a request to abort current cmd */
+#define CC_ERROR 2 /* Char could not be accepted due to error */
+#define CC_PASS 3 /* Char was rejected (internal) */
+
+#define CF_QUIT_ON_ERASE 0001 /* Abort cmd if its entirely erased */
+
+/* Special char bit-flags used to tell put_line() to do something special */
+#define AT_NORMAL (0)
+#define AT_UNDERLINE (1 << 0)
+#define AT_BOLD (1 << 1)
+#define AT_BLINK (1 << 2)
+#define AT_STANDOUT (1 << 3)
+#define AT_ANSI (1 << 4) /* Content-supplied "ANSI" escape sequence */
+#define AT_BINARY (1 << 5) /* LESS*BINFMT representation */
+#define AT_HILITE (1 << 6) /* Internal highlights (e.g., for search) */
+
+#if '0' == 240
+#define IS_EBCDIC_HOST 1
+#endif
+
+#if IS_EBCDIC_HOST
+/*
+ * Long definition for EBCDIC.
+ * Since the argument is usually a constant, this macro normally compiles
+ * into a constant.
+ */
+#define CONTROL(c) ( \
+ (c)=='[' ? '\047' : \
+ (c)=='a' ? '\001' : \
+ (c)=='b' ? '\002' : \
+ (c)=='c' ? '\003' : \
+ (c)=='d' ? '\067' : \
+ (c)=='e' ? '\055' : \
+ (c)=='f' ? '\056' : \
+ (c)=='g' ? '\057' : \
+ (c)=='h' ? '\026' : \
+ (c)=='i' ? '\005' : \
+ (c)=='j' ? '\025' : \
+ (c)=='k' ? '\013' : \
+ (c)=='l' ? '\014' : \
+ (c)=='m' ? '\015' : \
+ (c)=='n' ? '\016' : \
+ (c)=='o' ? '\017' : \
+ (c)=='p' ? '\020' : \
+ (c)=='q' ? '\021' : \
+ (c)=='r' ? '\022' : \
+ (c)=='s' ? '\023' : \
+ (c)=='t' ? '\074' : \
+ (c)=='u' ? '\075' : \
+ (c)=='v' ? '\062' : \
+ (c)=='w' ? '\046' : \
+ (c)=='x' ? '\030' : \
+ (c)=='y' ? '\031' : \
+ (c)=='z' ? '\077' : \
+ (c)=='A' ? '\001' : \
+ (c)=='B' ? '\002' : \
+ (c)=='C' ? '\003' : \
+ (c)=='D' ? '\067' : \
+ (c)=='E' ? '\055' : \
+ (c)=='F' ? '\056' : \
+ (c)=='G' ? '\057' : \
+ (c)=='H' ? '\026' : \
+ (c)=='I' ? '\005' : \
+ (c)=='J' ? '\025' : \
+ (c)=='K' ? '\013' : \
+ (c)=='L' ? '\014' : \
+ (c)=='M' ? '\015' : \
+ (c)=='N' ? '\016' : \
+ (c)=='O' ? '\017' : \
+ (c)=='P' ? '\020' : \
+ (c)=='Q' ? '\021' : \
+ (c)=='R' ? '\022' : \
+ (c)=='S' ? '\023' : \
+ (c)=='T' ? '\074' : \
+ (c)=='U' ? '\075' : \
+ (c)=='V' ? '\062' : \
+ (c)=='W' ? '\046' : \
+ (c)=='X' ? '\030' : \
+ (c)=='Y' ? '\031' : \
+ (c)=='Z' ? '\077' : \
+ (c)=='|' ? '\031' : \
+ (c)=='\\' ? '\034' : \
+ (c)=='^' ? '\036' : \
+ (c)&077)
+#else
+#define CONTROL(c) ((c)&037)
+#endif /* IS_EBCDIC_HOST */
+
+#define ESC CONTROL('[')
+#define CSI ((unsigned char)'\233')
+#define CHAR_END_COMMAND 0x40000000
+
+#if _OSK_MWC32
+#define LSIGNAL(sig,func) os9_signal(sig,func)
+#else
+#define LSIGNAL(sig,func) signal(sig,func)
+#endif
+
+#if HAVE_SIGPROCMASK
+#if HAVE_SIGSET_T
+#else
+#undef HAVE_SIGPROCMASK
+#endif
+#endif
+#if HAVE_SIGPROCMASK
+#if HAVE_SIGEMPTYSET
+#else
+#undef sigemptyset
+#define sigemptyset(mp) *(mp) = 0
+#endif
+#endif
+
+#define S_INTERRUPT 01
+#define S_STOP 02
+#define S_WINCH 04
+#define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP))
+
+#define QUIT_OK 0
+#define QUIT_ERROR 1
+#define QUIT_INTERRUPT 2
+#define QUIT_SAVED_STATUS (-1)
+
+#define FOLLOW_DESC 0
+#define FOLLOW_NAME 1
+
+/* filestate flags */
+#define CH_CANSEEK 001
+#define CH_KEEPOPEN 002
+#define CH_POPENED 004
+#define CH_HELPFILE 010
+#define CH_NODATA 020 /* Special case for zero length files */
+
+
+#define ch_zero() ((POSITION)0)
+
+#define FAKE_HELPFILE "@/\\less/\\help/\\file/\\@"
+#define FAKE_EMPTYFILE "@/\\less/\\empty/\\file/\\@"
+
+/* Flags for cvt_text */
+#define CVT_TO_LC 01 /* Convert upper-case to lower-case */
+#define CVT_BS 02 /* Do backspace processing */
+#define CVT_CRLF 04 /* Remove CR after LF */
+#define CVT_ANSI 010 /* Remove ANSI escape sequences */
+
+#if HAVE_TIME_T
+#define time_type time_t
+#else
+#define time_type long
+#endif
+
+#include "funcs.h"
+
+/* Functions not included in funcs.h */
+void postoa();
+void linenumtoa();
+void inttoa();
--- /dev/null
+
+ S\bSU\bUM\bMM\bMA\bAR\bRY\bY O\bOF\bF L\bLE\bES\bSS\bS C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS
+
+ Commands marked with * may be preceded by a number, _\bN.
+ Notes in parentheses indicate the behavior if _\bN is given.
+ A key preceded by a caret indicates the Ctrl key; thus ^K is ctrl-K.
+
+ h H Display this help.
+ q :q Q :Q ZZ Exit.
+ ---------------------------------------------------------------------------
+
+ M\bMO\bOV\bVI\bIN\bNG\bG
+
+ e ^E j ^N CR * Forward one line (or _\bN lines).
+ y ^Y k ^K ^P * Backward one line (or _\bN lines).
+ f ^F ^V SPACE * Forward one window (or _\bN lines).
+ b ^B ESC-v * Backward one window (or _\bN lines).
+ z * Forward one window (and set window to _\bN).
+ w * Backward one window (and set window to _\bN).
+ ESC-SPACE * Forward one window, but don't stop at end-of-file.
+ d ^D * Forward one half-window (and set half-window to _\bN).
+ u ^U * Backward one half-window (and set half-window to _\bN).
+ ESC-) RightArrow * Left one half screen width (or _\bN positions).
+ ESC-( LeftArrow * Right one half screen width (or _\bN positions).
+ F Forward forever; like "tail -f".
+ ESC-F Like F but stop when search pattern is found.
+ r ^R ^L Repaint screen.
+ R Repaint screen, discarding buffered input.
+ ---------------------------------------------------
+ Default "window" is the screen height.
+ Default "half-window" is half of the screen height.
+ ---------------------------------------------------------------------------
+
+ S\bSE\bEA\bAR\bRC\bCH\bHI\bIN\bNG\bG
+
+ /_\bp_\ba_\bt_\bt_\be_\br_\bn * Search forward for (_\bN-th) matching line.
+ ?_\bp_\ba_\bt_\bt_\be_\br_\bn * Search backward for (_\bN-th) matching line.
+ n * Repeat previous search (for _\bN-th occurrence).
+ N * Repeat previous search in reverse direction.
+ ESC-n * Repeat previous search, spanning files.
+ ESC-N * Repeat previous search, reverse dir. & spanning files.
+ ESC-u Undo (toggle) search highlighting.
+ &_\bp_\ba_\bt_\bt_\be_\br_\bn * Display only matching lines
+ ---------------------------------------------------
+ A search pattern may be preceded by one or more of:
+ ^N or ! Search for NON-matching lines.
+ ^E or * Search multiple files (pass thru END OF FILE).
+ ^F or @ Start search at FIRST file (for /) or last file (for ?).
+ ^K Highlight matches, but don't move (KEEP position).
+ ^R Don't use REGULAR EXPRESSIONS.
+ ---------------------------------------------------------------------------
+
+ J\bJU\bUM\bMP\bPI\bIN\bNG\bG
+
+ g < ESC-< * Go to first line in file (or line _\bN).
+ G > ESC-> * Go to last line in file (or line _\bN).
+ p % * Go to beginning of file (or _\bN percent into file).
+ t * Go to the (_\bN-th) next tag.
+ T * Go to the (_\bN-th) previous tag.
+ { ( [ * Find close bracket } ) ].
+ } ) ] * Find open bracket { ( [.
+ ESC-^F _\b<_\bc_\b1_\b> _\b<_\bc_\b2_\b> * Find close bracket _\b<_\bc_\b2_\b>.
+ ESC-^B _\b<_\bc_\b1_\b> _\b<_\bc_\b2_\b> * Find open bracket _\b<_\bc_\b1_\b>
+ ---------------------------------------------------
+ Each "find close bracket" command goes forward to the close bracket
+ matching the (_\bN-th) open bracket in the top line.
+ Each "find open bracket" command goes backward to the open bracket
+ matching the (_\bN-th) close bracket in the bottom line.
+
+ m_\b<_\bl_\be_\bt_\bt_\be_\br_\b> Mark the current position with <letter>.
+ '_\b<_\bl_\be_\bt_\bt_\be_\br_\b> Go to a previously marked position.
+ '' Go to the previous position.
+ ^X^X Same as '.
+ ---------------------------------------------------
+ A mark is any upper-case or lower-case letter.
+ Certain marks are predefined:
+ ^ means beginning of the file
+ $ means end of the file
+ ---------------------------------------------------------------------------
+
+ C\bCH\bHA\bAN\bNG\bGI\bIN\bNG\bG F\bFI\bIL\bLE\bES\bS
+
+ :e [_\bf_\bi_\bl_\be] Examine a new file.
+ ^X^V Same as :e.
+ :n * Examine the (_\bN-th) next file from the command line.
+ :p * Examine the (_\bN-th) previous file from the command line.
+ :x * Examine the first (or _\bN-th) file from the command line.
+ :d Delete the current file from the command line list.
+ = ^G :f Print current file name.
+ ---------------------------------------------------------------------------
+
+ M\bMI\bIS\bSC\bCE\bEL\bLL\bLA\bAN\bNE\bEO\bOU\bUS\bS C\bCO\bOM\bMM\bMA\bAN\bND\bDS\bS
+
+ -_\b<_\bf_\bl_\ba_\bg_\b> Toggle a command line option [see OPTIONS below].
+ --_\b<_\bn_\ba_\bm_\be_\b> Toggle a command line option, by name.
+ __\b<_\bf_\bl_\ba_\bg_\b> Display the setting of a command line option.
+ ___\b<_\bn_\ba_\bm_\be_\b> Display the setting of an option, by name.
+ +_\bc_\bm_\bd Execute the less cmd each time a new file is examined.
+
+ !_\bc_\bo_\bm_\bm_\ba_\bn_\bd Execute the shell command with $SHELL.
+ |X\bX_\bc_\bo_\bm_\bm_\ba_\bn_\bd Pipe file between current pos & mark X\bX to shell command.
+ v Edit the current file with $VISUAL or $EDITOR.
+ V Print version number of "less".
+ ---------------------------------------------------------------------------
+
+ O\bOP\bPT\bTI\bIO\bON\bNS\bS
+
+ Most options may be changed either on the command line,
+ or from within less by using the - or -- command.
+ Options may be given in one of two forms: either a single
+ character preceded by a -, or a name preceded by --.
+
+ -? ........ --help
+ Display help (from command line).
+ -a ........ --search-skip-screen
+ Search skips current screen.
+ -A ........ --SEARCH-SKIP-SCREEN
+ Search starts just after target line.
+ -b [_\bN] .... --buffers=[_\bN]
+ Number of buffers.
+ -B ........ --auto-buffers
+ Don't automatically allocate buffers for pipes.
+ -c ........ --clear-screen
+ Repaint by clearing rather than scrolling.
+ -d ........ --dumb
+ Dumb terminal.
+ -D [_\bx_\bn_\b._\bn] . --color=_\bx_\bn_\b._\bn
+ Set screen colors. (MS-DOS only)
+ -e -E .... --quit-at-eof --QUIT-AT-EOF
+ Quit at end of file.
+ -f ........ --force
+ Force open non-regular files.
+ -F ........ --quit-if-one-screen
+ Quit if entire file fits on first screen.
+ -g ........ --hilite-search
+ Highlight only last match for searches.
+ -G ........ --HILITE-SEARCH
+ Don't highlight any matches for searches.
+ -h [_\bN] .... --max-back-scroll=[_\bN]
+ Backward scroll limit.
+ -i ........ --ignore-case
+ Ignore case in searches that do not contain uppercase.
+ -I ........ --IGNORE-CASE
+ Ignore case in all searches.
+ -j [_\bN] .... --jump-target=[_\bN]
+ Screen position of target lines.
+ -J ........ --status-column
+ Display a status column at left edge of screen.
+ -k [_\bf_\bi_\bl_\be] . --lesskey-file=[_\bf_\bi_\bl_\be]
+ Use a lesskey file.
+ -K --quit-on-intr
+ Exit less in response to ctrl-C.
+ -L ........ --no-lessopen
+ Ignore the LESSOPEN environment variable.
+ -m -M .... --long-prompt --LONG-PROMPT
+ Set prompt style.
+ -n -N .... --line-numbers --LINE-NUMBERS
+ Don't use line numbers.
+ -o [_\bf_\bi_\bl_\be] . --log-file=[_\bf_\bi_\bl_\be]
+ Copy to log file (standard input only).
+ -O [_\bf_\bi_\bl_\be] . --LOG-FILE=[_\bf_\bi_\bl_\be]
+ Copy to log file (unconditionally overwrite).
+ -p [_\bp_\ba_\bt_\bt_\be_\br_\bn] --pattern=[_\bp_\ba_\bt_\bt_\be_\br_\bn]
+ Start at pattern (from command line).
+ -P [_\bp_\br_\bo_\bm_\bp_\bt] --prompt=[_\bp_\br_\bo_\bm_\bp_\bt]
+ Define new prompt.
+ -q -Q .... --quiet --QUIET --silent --SILENT
+ Quiet the terminal bell.
+ -r -R .... --raw-control-chars --RAW-CONTROL-CHARS
+ Output "raw" control characters.
+ -s ........ --squeeze-blank-lines
+ Squeeze multiple blank lines.
+ -S ........ --chop-long-lines
+ Chop (truncate) long lines rather than wrapping.
+ -t [_\bt_\ba_\bg] .. --tag=[_\bt_\ba_\bg]
+ Find a tag.
+ -T [_\bt_\ba_\bg_\bs_\bf_\bi_\bl_\be] --tag-file=[_\bt_\ba_\bg_\bs_\bf_\bi_\bl_\be]
+ Use an alternate tags file.
+ -u -U .... --underline-special --UNDERLINE-SPECIAL
+ Change handling of backspaces.
+ -V ........ --version
+ Display the version number of "less".
+ -w ........ --hilite-unread
+ Highlight first new line after forward-screen.
+ -W ........ --HILITE-UNREAD
+ Highlight first new line after any forward movement.
+ -x [_\bN[,...]] --tabs=[_\bN[,...]]
+ Set tab stops.
+ -X ........ --no-init
+ Don't use termcap init/deinit strings.
+ -y [_\bN] .... --max-forw-scroll=[_\bN]
+ Forward scroll limit.
+ -z [_\bN] .... --window=[_\bN]
+ Set size of window.
+ -" [_\bc[_\bc]] . --quotes=[_\bc[_\bc]]
+ Set shell quote characters.
+ -~ ........ --tilde
+ Don't display tildes after end of file.
+ -# [_\bN] .... --shift=[_\bN]
+ Horizontal scroll amount (0 = one half screen width)
+ ........ --no-keypad
+ Don't send termcap keypad init/deinit strings.
+ ........ --follow-name
+ The F command changes files if the input file is renamed.
+ ........ --use-backslash
+ Subsequent options use backslash as escape char.
+
+
+ ---------------------------------------------------------------------------
+
+ L\bLI\bIN\bNE\bE E\bED\bDI\bIT\bTI\bIN\bNG\bG
+
+ These keys can be used to edit text being entered
+ on the "command line" at the bottom of the screen.
+
+ RightArrow ..................... ESC-l ... Move cursor right one character.
+ LeftArrow ...................... ESC-h ... Move cursor left one character.
+ ctrl-RightArrow ESC-RightArrow ESC-w ... Move cursor right one word.
+ ctrl-LeftArrow ESC-LeftArrow ESC-b ... Move cursor left one word.
+ HOME ........................... ESC-0 ... Move cursor to start of line.
+ END ............................ ESC-$ ... Move cursor to end of line.
+ BACKSPACE ................................ Delete char to left of cursor.
+ DELETE ......................... ESC-x ... Delete char under cursor.
+ ctrl-BACKSPACE ESC-BACKSPACE ........... Delete word to left of cursor.
+ ctrl-DELETE .... ESC-DELETE .... ESC-X ... Delete word under cursor.
+ ctrl-U ......... ESC (MS-DOS only) ....... Delete entire line.
+ UpArrow ........................ ESC-k ... Retrieve previous command line.
+ DownArrow ...................... ESC-j ... Retrieve next command line.
+ TAB ...................................... Complete filename & cycle.
+ SHIFT-TAB ...................... ESC-TAB Complete filename & reverse cycle.
+ ctrl-L ................................... Complete filename, list all.
+
+
--- /dev/null
+LESS(1) General Commands Manual LESS(1)
+
+
+
+\e[1mNAME\e[0m
+ less - opposite of more
+
+\e[1mSYNOPSIS\e[0m
+ \e[1mless -?\e[0m
+ \e[1mless --help\e[0m
+ \e[1mless -V\e[0m
+ \e[1mless --version\e[0m
+ \e[1mless [-[+]aABcCdeEfFgGiIJKLmMnNqQrRsSuUVwWX~]\e[0m
+ \e[1m[-b \e[4m\e[22mspace\e[24m\e[1m] [-h \e[4m\e[22mlines\e[24m\e[1m] [-j \e[4m\e[22mline\e[24m\e[1m] [-k \e[4m\e[22mkeyfile\e[24m\e[1m]\e[0m
+ \e[1m[-{oO} \e[4m\e[22mlogfile\e[24m\e[1m] [-p \e[4m\e[22mpattern\e[24m\e[1m] [-P \e[4m\e[22mprompt\e[24m\e[1m] [-t \e[4m\e[22mtag\e[24m\e[1m]\e[0m
+ \e[1m[-T \e[4m\e[22mtagsfile\e[24m\e[1m] [-x \e[4m\e[22mtab\e[24m\e[1m,...] [-y \e[4m\e[22mlines\e[24m\e[1m] [-[z] \e[4m\e[22mlines\e[24m\e[1m]\e[0m
+ \e[1m[-# \e[4m\e[22mshift\e[24m\e[1m] [+[+]\e[4m\e[22mcmd\e[24m\e[1m] [--] [\e[4m\e[22mfilename\e[24m\e[1m]...\e[0m
+ (See the OPTIONS section for alternate option syntax with long option
+ names.)
+
+
+\e[1mDESCRIPTION\e[0m
+ \e[4mLess\e[24m is a program similar to \e[4mmore\e[24m (1), but which allows backward move-
+ ment in the file as well as forward movement. Also, \e[4mless\e[24m does not have
+ to read the entire input file before starting, so with large input
+ files it starts up faster than text editors like \e[4mvi\e[24m (1). \e[4mLess\e[24m uses
+ termcap (or terminfo on some systems), so it can run on a variety of
+ terminals. There is even limited support for hardcopy terminals. (On
+ a hardcopy terminal, lines which should be printed at the top of the
+ screen are prefixed with a caret.)
+
+ Commands are based on both \e[4mmore\e[24m and \e[4mvi.\e[24m Commands may be preceded by a
+ decimal number, called N in the descriptions below. The number is used
+ by some commands, as indicated.
+
+
+\e[1mCOMMANDS\e[0m
+ In the following descriptions, ^X means control-X. ESC stands for the
+ ESCAPE key; for example ESC-v means the two character sequence
+ "ESCAPE", then "v".
+
+ h or H Help: display a summary of these commands. If you forget all
+ the other commands, remember this one.
+
+ SPACE or ^V or f or ^F
+ Scroll forward N lines, default one window (see option -z
+ below). If N is more than the screen size, only the final
+ screenful is displayed. Warning: some systems use ^V as a spe-
+ cial literalization character.
+
+ z Like SPACE, but if N is specified, it becomes the new window
+ size.
+
+ ESC-SPACE
+ Like SPACE, but scrolls a full screenful, even if it reaches
+ end-of-file in the process.
+
+ ENTER or RETURN or ^N or e or ^E or j or ^J
+ Scroll forward N lines, default 1. The entire N lines are dis-
+ played, even if N is more than the screen size.
+
+ d or ^D
+ Scroll forward N lines, default one half of the screen size. If
+ N is specified, it becomes the new default for subsequent d and
+ u commands.
+
+ b or ^B or ESC-v
+ Scroll backward N lines, default one window (see option -z
+ below). If N is more than the screen size, only the final
+ screenful is displayed.
+
+ w Like ESC-v, but if N is specified, it becomes the new window
+ size.
+
+ y or ^Y or ^P or k or ^K
+ Scroll backward N lines, default 1. The entire N lines are dis-
+ played, even if N is more than the screen size. Warning: some
+ systems use ^Y as a special job control character.
+
+ u or ^U
+ Scroll backward N lines, default one half of the screen size.
+ If N is specified, it becomes the new default for subsequent d
+ and u commands.
+
+ J Like j, but continues to scroll beyond the end of the file.
+
+ K or Y Like k, but continues to scroll beyond the beginning of the
+ file.
+
+ ESC-) or RIGHTARROW
+ Scroll horizontally right N characters, default half the screen
+ width (see the -# option). If a number N is specified, it
+ becomes the default for future RIGHTARROW and LEFTARROW com-
+ mands. While the text is scrolled, it acts as though the -S
+ option (chop lines) were in effect.
+
+ ESC-( or LEFTARROW
+ Scroll horizontally left N characters, default half the screen
+ width (see the -# option). If a number N is specified, it
+ becomes the default for future RIGHTARROW and LEFTARROW com-
+ mands.
+
+ r or ^R or ^L
+ Repaint the screen.
+
+ R Repaint the screen, discarding any buffered input. Useful if
+ the file is changing while it is being viewed.
+
+ F Scroll forward, and keep trying to read when the end of file is
+ reached. Normally this command would be used when already at
+ the end of the file. It is a way to monitor the tail of a file
+ which is growing while it is being viewed. (The behavior is
+ similar to the "tail -f" command.)
+
+ ESC-F Like F, but as soon as a line is found which matches the last
+ search pattern, the terminal bell is rung and forward scrolling
+ stops.
+
+ g or < or ESC-<
+ Go to line N in the file, default 1 (beginning of file). (Warn-
+ ing: this may be slow if N is large.)
+
+ G or > or ESC->
+ Go to line N in the file, default the end of the file. (Warn-
+ ing: this may be slow if N is large, or if N is not specified
+ and standard input, rather than a file, is being read.)
+
+ ESC-G Same as G, except if no number N is specified and the input is
+ standard input, goes to the last line which is currently
+ buffered.
+
+ p or % Go to a position N percent into the file. N should be between 0
+ and 100, and may contain a decimal point.
+
+ P Go to the line containing byte offset N in the file.
+
+ { If a left curly bracket appears in the top line displayed on the
+ screen, the { command will go to the matching right curly
+ bracket. The matching right curly bracket is positioned on the
+ bottom line of the screen. If there is more than one left curly
+ bracket on the top line, a number N may be used to specify the
+ N-th bracket on the line.
+
+ } If a right curly bracket appears in the bottom line displayed on
+ the screen, the } command will go to the matching left curly
+ bracket. The matching left curly bracket is positioned on the
+ top line of the screen. If there is more than one right curly
+ bracket on the top line, a number N may be used to specify the
+ N-th bracket on the line.
+
+ ( Like {, but applies to parentheses rather than curly brackets.
+
+ ) Like }, but applies to parentheses rather than curly brackets.
+
+ [ Like {, but applies to square brackets rather than curly brack-
+ ets.
+
+ ] Like }, but applies to square brackets rather than curly brack-
+ ets.
+
+ ESC-^F Followed by two characters, acts like {, but uses the two char-
+ acters as open and close brackets, respectively. For example,
+ "ESC ^F < >" could be used to go forward to the > which matches
+ the < in the top displayed line.
+
+ ESC-^B Followed by two characters, acts like }, but uses the two char-
+ acters as open and close brackets, respectively. For example,
+ "ESC ^B < >" could be used to go backward to the < which matches
+ the > in the bottom displayed line.
+
+ m Followed by any lowercase letter, marks the current position
+ with that letter.
+
+ ' (Single quote.) Followed by any lowercase letter, returns to
+ the position which was previously marked with that letter. Fol-
+ lowed by another single quote, returns to the position at which
+ the last "large" movement command was executed. Followed by a ^
+ or $, jumps to the beginning or end of the file respectively.
+ Marks are preserved when a new file is examined, so the ' com-
+ mand can be used to switch between input files.
+
+ ^X^X Same as single quote.
+
+ /pattern
+ Search forward in the file for the N-th line containing the pat-
+ tern. N defaults to 1. The pattern is a regular expression, as
+ recognized by the regular expression library supplied by your
+ system. The search starts at the first line displayed (but see
+ the -a and -j options, which change this).
+
+ Certain characters are special if entered at the beginning of
+ the pattern; they modify the type of search rather than become
+ part of the pattern:
+
+ ^N or !
+ Search for lines which do NOT match the pattern.
+
+ ^E or *
+ Search multiple files. That is, if the search reaches
+ the END of the current file without finding a match, the
+ search continues in the next file in the command line
+ list.
+
+ ^F or @
+ Begin the search at the first line of the FIRST file in
+ the command line list, regardless of what is currently
+ displayed on the screen or the settings of the -a or -j
+ options.
+
+ ^K Highlight any text which matches the pattern on the cur-
+ rent screen, but don't move to the first match (KEEP cur-
+ rent position).
+
+ ^R Don't interpret regular expression metacharacters; that
+ is, do a simple textual comparison.
+
+ ?pattern
+ Search backward in the file for the N-th line containing the
+ pattern. The search starts at the last line displayed (but see
+ the -a and -j options, which change this).
+
+ Certain characters are special as in the / command:
+
+ ^N or !
+ Search for lines which do NOT match the pattern.
+
+ ^E or *
+ Search multiple files. That is, if the search reaches
+ the beginning of the current file without finding a
+ match, the search continues in the previous file in the
+ command line list.
+
+ ^F or @
+ Begin the search at the last line of the last file in the
+ command line list, regardless of what is currently dis-
+ played on the screen or the settings of the -a or -j
+ options.
+
+ ^K As in forward searches.
+
+ ^R As in forward searches.
+
+ ESC-/pattern
+ Same as "/*".
+
+ ESC-?pattern
+ Same as "?*".
+
+ n Repeat previous search, for N-th line containing the last pat-
+ tern. If the previous search was modified by ^N, the search is
+ made for the N-th line NOT containing the pattern. If the pre-
+ vious search was modified by ^E, the search continues in the
+ next (or previous) file if not satisfied in the current file.
+ If the previous search was modified by ^R, the search is done
+ without using regular expressions. There is no effect if the
+ previous search was modified by ^F or ^K.
+
+ N Repeat previous search, but in the reverse direction.
+
+ ESC-n Repeat previous search, but crossing file boundaries. The
+ effect is as if the previous search were modified by *.
+
+ ESC-N Repeat previous search, but in the reverse direction and cross-
+ ing file boundaries.
+
+ ESC-u Undo search highlighting. Turn off highlighting of strings
+ matching the current search pattern. If highlighting is already
+ off because of a previous ESC-u command, turn highlighting back
+ on. Any search command will also turn highlighting back on.
+ (Highlighting can also be disabled by toggling the -G option; in
+ that case search commands do not turn highlighting back on.)
+
+ &pattern
+ Display only lines which match the pattern; lines which do not
+ match the pattern are not displayed. If pattern is empty (if
+ you type & immediately followed by ENTER), any filtering is
+ turned off, and all lines are displayed. While filtering is in
+ effect, an ampersand is displayed at the beginning of the
+ prompt, as a reminder that some lines in the file may be hidden.
+
+ Certain characters are special as in the / command:
+
+ ^N or !
+ Display only lines which do NOT match the pattern.
+
+ ^R Don't interpret regular expression metacharacters; that
+ is, do a simple textual comparison.
+
+ :e [filename]
+ Examine a new file. If the filename is missing, the "current"
+ file (see the :n and :p commands below) from the list of files
+ in the command line is re-examined. A percent sign (%) in the
+ filename is replaced by the name of the current file. A pound
+ sign (#) is replaced by the name of the previously examined
+ file. However, two consecutive percent signs are simply
+ replaced with a single percent sign. This allows you to enter a
+ filename that contains a percent sign in the name. Similarly,
+ two consecutive pound signs are replaced with a single pound
+ sign. The filename is inserted into the command line list of
+ files so that it can be seen by subsequent :n and :p commands.
+ If the filename consists of several files, they are all inserted
+ into the list of files and the first one is examined. If the
+ filename contains one or more spaces, the entire filename should
+ be enclosed in double quotes (also see the -" option).
+
+ ^X^V or E
+ Same as :e. Warning: some systems use ^V as a special literal-
+ ization character. On such systems, you may not be able to use
+ ^V.
+
+ :n Examine the next file (from the list of files given in the com-
+ mand line). If a number N is specified, the N-th next file is
+ examined.
+
+ :p Examine the previous file in the command line list. If a number
+ N is specified, the N-th previous file is examined.
+
+ :x Examine the first file in the command line list. If a number N
+ is specified, the N-th file in the list is examined.
+
+ :d Remove the current file from the list of files.
+
+ t Go to the next tag, if there were more than one matches for the
+ current tag. See the -t option for more details about tags.
+
+ T Go to the previous tag, if there were more than one matches for
+ the current tag.
+
+ = or ^G or :f
+ Prints some information about the file being viewed, including
+ its name and the line number and byte offset of the bottom line
+ being displayed. If possible, it also prints the length of the
+ file, the number of lines in the file and the percent of the
+ file above the last displayed line.
+
+ - Followed by one of the command line option letters (see OPTIONS
+ below), this will change the setting of that option and print a
+ message describing the new setting. If a ^P (CONTROL-P) is
+ entered immediately after the dash, the setting of the option is
+ changed but no message is printed. If the option letter has a
+ numeric value (such as -b or -h), or a string value (such as -P
+ or -t), a new value may be entered after the option letter. If
+ no new value is entered, a message describing the current set-
+ ting is printed and nothing is changed.
+
+ -- Like the - command, but takes a long option name (see OPTIONS
+ below) rather than a single option letter. You must press ENTER
+ or RETURN after typing the option name. A ^P immediately after
+ the second dash suppresses printing of a message describing the
+ new setting, as in the - command.
+
+ -+ Followed by one of the command line option letters this will
+ reset the option to its default setting and print a message
+ describing the new setting. (The "-+\e[4mX\e[24m" command does the same
+ thing as "-+\e[4mX\e[24m" on the command line.) This does not work for
+ string-valued options.
+
+ --+ Like the -+ command, but takes a long option name rather than a
+ single option letter.
+
+ -! Followed by one of the command line option letters, this will
+ reset the option to the "opposite" of its default setting and
+ print a message describing the new setting. This does not work
+ for numeric or string-valued options.
+
+ --! Like the -! command, but takes a long option name rather than a
+ single option letter.
+
+ _ (Underscore.) Followed by one of the command line option let-
+ ters, this will print a message describing the current setting
+ of that option. The setting of the option is not changed.
+
+ __ (Double underscore.) Like the _ (underscore) command, but takes
+ a long option name rather than a single option letter. You must
+ press ENTER or RETURN after typing the option name.
+
+ +cmd Causes the specified cmd to be executed each time a new file is
+ examined. For example, +G causes \e[4mless\e[24m to initially display each
+ file starting at the end rather than the beginning.
+
+ V Prints the version number of \e[4mless\e[24m being run.
+
+ q or Q or :q or :Q or ZZ
+ Exits \e[4mless.\e[0m
+
+ The following four commands may or may not be valid, depending on your
+ particular installation.
+
+ v Invokes an editor to edit the current file being viewed. The
+ editor is taken from the environment variable VISUAL if defined,
+ or EDITOR if VISUAL is not defined, or defaults to "vi" if nei-
+ ther VISUAL nor EDITOR is defined. See also the discussion of
+ LESSEDIT under the section on PROMPTS below.
+
+ ! shell-command
+ Invokes a shell to run the shell-command given. A percent sign
+ (%) in the command is replaced by the name of the current file.
+ A pound sign (#) is replaced by the name of the previously exam-
+ ined file. "!!" repeats the last shell command. "!" with no
+ shell command simply invokes a shell. On Unix systems, the
+ shell is taken from the environment variable SHELL, or defaults
+ to "sh". On MS-DOS and OS/2 systems, the shell is the normal
+ command processor.
+
+ | <m> shell-command
+ <m> represents any mark letter. Pipes a section of the input
+ file to the given shell command. The section of the file to be
+ piped is between the first line on the current screen and the
+ position marked by the letter. <m> may also be ^ or $ to indi-
+ cate beginning or end of file respectively. If <m> is . or new-
+ line, the current screen is piped.
+
+ s filename
+ Save the input to a file. This only works if the input is a
+ pipe, not an ordinary file.
+
+\e[1mOPTIONS\e[0m
+ Command line options are described below. Most options may be changed
+ while \e[4mless\e[24m is running, via the "-" command.
+
+ Most options may be given in one of two forms: either a dash followed
+ by a single letter, or two dashes followed by a long option name. A
+ long option name may be abbreviated as long as the abbreviation is
+ unambiguous. For example, --quit-at-eof may be abbreviated --quit, but
+ not --qui, since both --quit-at-eof and --quiet begin with --qui. Some
+ long option names are in uppercase, such as --QUIT-AT-EOF, as distinct
+ from --quit-at-eof. Such option names need only have their first let-
+ ter capitalized; the remainder of the name may be in either case. For
+ example, --Quit-at-eof is equivalent to --QUIT-AT-EOF.
+
+ Options are also taken from the environment variable "LESS". For exam-
+ ple, to avoid typing "less -options ..." each time \e[4mless\e[24m is invoked, you
+ might tell \e[4mcsh:\e[0m
+
+ setenv LESS "-options"
+
+ or if you use \e[4msh:\e[0m
+
+ LESS="-options"; export LESS
+
+ On MS-DOS, you don't need the quotes, but you should replace any per-
+ cent signs in the options string by double percent signs.
+
+ The environment variable is parsed before the command line, so command
+ line options override the LESS environment variable. If an option
+ appears in the LESS variable, it can be reset to its default value on
+ the command line by beginning the command line option with "-+".
+
+ Some options like -k or -D require a string to follow the option let-
+ ter. The string for that option is considered to end when a dollar
+ sign ($) is found. For example, you can set two -D options on MS-DOS
+ like this:
+
+ LESS="Dn9.1$Ds4.1"
+
+ If the --use-backslash option appears earlier in the options, then a
+ dollar sign or backslash may be included literally in an option string
+ by preceding it with a backslash. If the --use-backslash option is not
+ in effect, then backslashes are not treated specially, and there is no
+ way to include a dollar sign in the option string.
+
+ -? or --help
+ This option displays a summary of the commands accepted by \e[4mless\e[0m
+ (the same as the h command). (Depending on how your shell
+ interprets the question mark, it may be necessary to quote the
+ question mark, thus: "-\?".)
+
+ -a or --search-skip-screen
+ By default, forward searches start at the top of the displayed
+ screen and backwards searches start at the bottom of the dis-
+ played screen (except for repeated searches invoked by the n or
+ N commands, which start after or before the "target" line
+ respectively; see the -j option for more about the target line).
+ The -a option causes forward searches to instead start at the
+ bottom of the screen and backward searches to start at the top
+ of the screen, thus skipping all lines displayed on the screen.
+
+ -A or --SEARCH-SKIP-SCREEN
+ Causes all forward searches (not just non-repeated searches) to
+ start just after the target line, and all backward searches to
+ start just before the target line. Thus, forward searches will
+ skip part of the displayed screen (from the first line up to and
+ including the target line). Similarly backwards searches will
+ skip the displayed screen from the last line up to and including
+ the target line. This was the default behavior in less versions
+ prior to 441.
+
+ -b\e[4mn\e[24m or --buffers=\e[4mn\e[0m
+ Specifies the amount of buffer space \e[4mless\e[24m will use for each
+ file, in units of kilobytes (1024 bytes). By default 64 K of
+ buffer space is used for each file (unless the file is a pipe;
+ see the -B option). The -b option specifies instead that \e[4mn\e[0m
+ kilobytes of buffer space should be used for each file. If \e[4mn\e[24m is
+ -1, buffer space is unlimited; that is, the entire file can be
+ read into memory.
+
+ -B or --auto-buffers
+ By default, when data is read from a pipe, buffers are allocated
+ automatically as needed. If a large amount of data is read from
+ the pipe, this can cause a large amount of memory to be allo-
+ cated. The -B option disables this automatic allocation of buf-
+ fers for pipes, so that only 64 K (or the amount of space speci-
+ fied by the -b option) is used for the pipe. Warning: use of -B
+ can result in erroneous display, since only the most recently
+ viewed part of the piped data is kept in memory; any earlier
+ data is lost.
+
+ -c or --clear-screen
+ Causes full screen repaints to be painted from the top line
+ down. By default, full screen repaints are done by scrolling
+ from the bottom of the screen.
+
+ -C or --CLEAR-SCREEN
+ Same as -c, for compatibility with older versions of \e[4mless.\e[0m
+
+ -d or --dumb
+ The -d option suppresses the error message normally displayed if
+ the terminal is dumb; that is, lacks some important capability,
+ such as the ability to clear the screen or scroll backward. The
+ -d option does not otherwise change the behavior of \e[4mless\e[24m on a
+ dumb terminal.
+
+ -D\e[1mx\e[4m\e[22mcolor\e[24m or --color=\e[1mx\e[4m\e[22mcolor\e[0m
+ [MS-DOS only] Sets the color of the text displayed. \e[1mx \e[22mis a sin-
+ gle character which selects the type of text whose color is
+ being set: n=normal, s=standout, d=bold, u=underlined, k=blink.
+ \e[4mcolor\e[24m is a pair of numbers separated by a period. The first
+ number selects the foreground color and the second selects the
+ background color of the text. A single number \e[4mN\e[24m is the same as
+ \e[4mN.M\e[24m, where \e[4mM\e[24m is the normal background color.
+
+
+ -e or --quit-at-eof
+ Causes \e[4mless\e[24m to automatically exit the second time it reaches
+ end-of-file. By default, the only way to exit \e[4mless\e[24m is via the
+ "q" command.
+
+ -E or --QUIT-AT-EOF
+ Causes \e[4mless\e[24m to automatically exit the first time it reaches end-
+ of-file.
+
+ -f or --force
+ Forces non-regular files to be opened. (A non-regular file is a
+ directory or a device special file.) Also suppresses the warn-
+ ing message when a binary file is opened. By default, \e[4mless\e[24m will
+ refuse to open non-regular files. Note that some operating sys-
+ tems will not allow directories to be read, even if -f is set.
+
+ -F or --quit-if-one-screen
+ Causes \e[4mless\e[24m to automatically exit if the entire file can be dis-
+ played on the first screen.
+
+ -g or --hilite-search
+ Normally, \e[4mless\e[24m will highlight ALL strings which match the last
+ search command. The -g option changes this behavior to high-
+ light only the particular string which was found by the last
+ search command. This can cause \e[4mless\e[24m to run somewhat faster than
+ the default.
+
+ -G or --HILITE-SEARCH
+ The -G option suppresses all highlighting of strings found by
+ search commands.
+
+ -h\e[4mn\e[24m or --max-back-scroll=\e[4mn\e[0m
+ Specifies a maximum number of lines to scroll backward. If it
+ is necessary to scroll backward more than \e[4mn\e[24m lines, the screen is
+ repainted in a forward direction instead. (If the terminal does
+ not have the ability to scroll backward, -h0 is implied.)
+
+ -i or --ignore-case
+ Causes searches to ignore case; that is, uppercase and lowercase
+ are considered identical. This option is ignored if any upper-
+ case letters appear in the search pattern; in other words, if a
+ pattern contains uppercase letters, then that search does not
+ ignore case.
+
+ -I or --IGNORE-CASE
+ Like -i, but searches ignore case even if the pattern contains
+ uppercase letters.
+
+ -j\e[4mn\e[24m or --jump-target=\e[4mn\e[0m
+ Specifies a line on the screen where the "target" line is to be
+ positioned. The target line is the line specified by any com-
+ mand to search for a pattern, jump to a line number, jump to a
+ file percentage or jump to a tag. The screen line may be speci-
+ fied by a number: the top line on the screen is 1, the next is
+ 2, and so on. The number may be negative to specify a line rel-
+ ative to the bottom of the screen: the bottom line on the screen
+ is -1, the second to the bottom is -2, and so on. Alternately,
+ the screen line may be specified as a fraction of the height of
+ the screen, starting with a decimal point: .5 is in the middle
+ of the screen, .3 is three tenths down from the first line, and
+ so on. If the line is specified as a fraction, the actual line
+ number is recalculated if the terminal window is resized, so
+ that the target line remains at the specified fraction of the
+ screen height. If any form of the -j option is used, repeated
+ forward searches (invoked with "n" or "N") begin at the line
+ immediately after the target line, and repeated backward
+ searches begin at the target line, unless changed by -a or -A.
+ For example, if "-j4" is used, the target line is the fourth
+ line on the screen, so forward searches begin at the fifth line
+ on the screen. However nonrepeated searches (invoked with "/"
+ or "?") always begin at the start or end of the current screen
+ respectively.
+
+ -J or --status-column
+ Displays a status column at the left edge of the screen. The
+ status column shows the lines that matched the current search.
+ The status column is also used if the -w or -W option is in
+ effect.
+
+ -k\e[4mfilename\e[24m or --lesskey-file=\e[4mfilename\e[0m
+ Causes \e[4mless\e[24m to open and interpret the named file as a \e[4mlesskey\e[0m
+ (1) file. Multiple -k options may be specified. If the LESSKEY
+ or LESSKEY_SYSTEM environment variable is set, or if a lesskey
+ file is found in a standard place (see KEY BINDINGS), it is also
+ used as a \e[4mlesskey\e[24m file.
+
+ -K or --quit-on-intr
+ Causes \e[4mless\e[24m to exit immediately (with status 2) when an inter-
+ rupt character (usually ^C) is typed. Normally, an interrupt
+ character causes \e[4mless\e[24m to stop whatever it is doing and return to
+ its command prompt. Note that use of this option makes it
+ impossible to return to the command prompt from the "F" command.
+
+ -L or --no-lessopen
+ Ignore the LESSOPEN environment variable (see the INPUT PRE-
+ PROCESSOR section below). This option can be set from within
+ \e[4mless\e[24m, but it will apply only to files opened subsequently, not
+ to the file which is currently open.
+
+ -m or --long-prompt
+ Causes \e[4mless\e[24m to prompt verbosely (like \e[4mmore\e[24m), with the percent
+ into the file. By default, \e[4mless\e[24m prompts with a colon.
+
+ -M or --LONG-PROMPT
+ Causes \e[4mless\e[24m to prompt even more verbosely than \e[4mmore.\e[0m
+
+ -n or --line-numbers
+ Suppresses line numbers. The default (to use line numbers) may
+ cause \e[4mless\e[24m to run more slowly in some cases, especially with a
+ very large input file. Suppressing line numbers with the -n
+ option will avoid this problem. Using line numbers means: the
+ line number will be displayed in the verbose prompt and in the =
+ command, and the v command will pass the current line number to
+ the editor (see also the discussion of LESSEDIT in PROMPTS
+ below).
+
+ -N or --LINE-NUMBERS
+ Causes a line number to be displayed at the beginning of each
+ line in the display.
+
+ -o\e[4mfilename\e[24m or --log-file=\e[4mfilename\e[0m
+ Causes \e[4mless\e[24m to copy its input to the named file as it is being
+ viewed. This applies only when the input file is a pipe, not an
+ ordinary file. If the file already exists, \e[4mless\e[24m will ask for
+ confirmation before overwriting it.
+
+ -O\e[4mfilename\e[24m or --LOG-FILE=\e[4mfilename\e[0m
+ The -O option is like -o, but it will overwrite an existing file
+ without asking for confirmation.
+
+ If no log file has been specified, the -o and -O options can be
+ used from within \e[4mless\e[24m to specify a log file. Without a file
+ name, they will simply report the name of the log file. The "s"
+ command is equivalent to specifying -o from within \e[4mless.\e[0m
+
+ -p\e[4mpattern\e[24m or --pattern=\e[4mpattern\e[0m
+ The -p option on the command line is equivalent to specifying
+ +/\e[4mpattern\e[24m; that is, it tells \e[4mless\e[24m to start at the first occur-
+ rence of \e[4mpattern\e[24m in the file.
+
+ -P\e[4mprompt\e[24m or --prompt=\e[4mprompt\e[0m
+ Provides a way to tailor the three prompt styles to your own
+ preference. This option would normally be put in the LESS envi-
+ ronment variable, rather than being typed in with each \e[4mless\e[24m com-
+ mand. Such an option must either be the last option in the LESS
+ variable, or be terminated by a dollar sign.
+ -Ps followed by a string changes the default (short) prompt to
+ that string.
+ -Pm changes the medium (-m) prompt.
+ -PM changes the long (-M) prompt.
+ -Ph changes the prompt for the help screen.
+ -P= changes the message printed by the = command.
+ -Pw changes the message printed while waiting for data (in the
+ F command). All prompt strings consist of a sequence of letters
+ and special escape sequences. See the section on PROMPTS for
+ more details.
+
+ -q or --quiet or --silent
+ Causes moderately "quiet" operation: the terminal bell is not
+ rung if an attempt is made to scroll past the end of the file or
+ before the beginning of the file. If the terminal has a "visual
+ bell", it is used instead. The bell will be rung on certain
+ other errors, such as typing an invalid character. The default
+ is to ring the terminal bell in all such cases.
+
+ -Q or --QUIET or --SILENT
+ Causes totally "quiet" operation: the terminal bell is never
+ rung.
+
+ -r or --raw-control-chars
+ Causes "raw" control characters to be displayed. The default is
+ to display control characters using the caret notation; for
+ example, a control-A (octal 001) is displayed as "^A". Warning:
+ when the -r option is used, \e[4mless\e[24m cannot keep track of the actual
+ appearance of the screen (since this depends on how the screen
+ responds to each type of control character). Thus, various dis-
+ play problems may result, such as long lines being split in the
+ wrong place.
+
+ -R or --RAW-CONTROL-CHARS
+ Like -r, but only ANSI "color" escape sequences are output in
+ "raw" form. Unlike -r, the screen appearance is maintained cor-
+ rectly in most cases. ANSI "color" escape sequences are
+ sequences of the form:
+
+ ESC [ ... m
+
+ where the "..." is zero or more color specification characters
+ For the purpose of keeping track of screen appearance, ANSI
+ color escape sequences are assumed to not move the cursor. You
+ can make \e[4mless\e[24m think that characters other than "m" can end ANSI
+ color escape sequences by setting the environment variable
+ LESSANSIENDCHARS to the list of characters which can end a color
+ escape sequence. And you can make \e[4mless\e[24m think that characters
+ other than the standard ones may appear between the ESC and the
+ m by setting the environment variable LESSANSIMIDCHARS to the
+ list of characters which can appear.
+
+ -s or --squeeze-blank-lines
+ Causes consecutive blank lines to be squeezed into a single
+ blank line. This is useful when viewing \e[4mnroff\e[24m output.
+
+ -S or --chop-long-lines
+ Causes lines longer than the screen width to be chopped (trun-
+ cated) rather than wrapped. That is, the portion of a long line
+ that does not fit in the screen width is not shown. The default
+ is to wrap long lines; that is, display the remainder on the
+ next line.
+
+ -t\e[4mtag\e[24m or --tag=\e[4mtag\e[0m
+ The -t option, followed immediately by a TAG, will edit the file
+ containing that tag. For this to work, tag information must be
+ available; for example, there may be a file in the current
+ directory called "tags", which was previously built by \e[4mctags\e[24m (1)
+ or an equivalent command. If the environment variable LESSGLOB-
+ ALTAGS is set, it is taken to be the name of a command compati-
+ ble with \e[4mglobal\e[24m (1), and that command is executed to find the
+ tag. (See http://www.gnu.org/software/global/global.html). The
+ -t option may also be specified from within \e[4mless\e[24m (using the -
+ command) as a way of examining a new file. The command ":t" is
+ equivalent to specifying -t from within \e[4mless.\e[0m
+
+ -T\e[4mtagsfile\e[24m or --tag-file=\e[4mtagsfile\e[0m
+ Specifies a tags file to be used instead of "tags".
+
+ -u or --underline-special
+ Causes backspaces and carriage returns to be treated as print-
+ able characters; that is, they are sent to the terminal when
+ they appear in the input.
+
+ -U or --UNDERLINE-SPECIAL
+ Causes backspaces, tabs and carriage returns to be treated as
+ control characters; that is, they are handled as specified by
+ the -r option.
+
+ By default, if neither -u nor -U is given, backspaces which
+ appear adjacent to an underscore character are treated spe-
+ cially: the underlined text is displayed using the terminal's
+ hardware underlining capability. Also, backspaces which appear
+ between two identical characters are treated specially: the
+ overstruck text is printed using the terminal's hardware bold-
+ face capability. Other backspaces are deleted, along with the
+ preceding character. Carriage returns immediately followed by a
+ newline are deleted. Other carriage returns are handled as
+ specified by the -r option. Text which is overstruck or under-
+ lined can be searched for if neither -u nor -U is in effect.
+
+ -V or --version
+ Displays the version number of \e[4mless.\e[0m
+
+ -w or --hilite-unread
+ Temporarily highlights the first "new" line after a forward
+ movement of a full page. The first "new" line is the line imme-
+ diately following the line previously at the bottom of the
+ screen. Also highlights the target line after a g or p command.
+ The highlight is removed at the next command which causes move-
+ ment. The entire line is highlighted, unless the -J option is
+ in effect, in which case only the status column is highlighted.
+
+ -W or --HILITE-UNREAD
+ Like -w, but temporarily highlights the first new line after any
+ forward movement command larger than one line.
+
+ -x\e[4mn\e[24m,... or --tabs=\e[4mn\e[24m,...
+ Sets tab stops. If only one \e[4mn\e[24m is specified, tab stops are set
+ at multiples of \e[4mn\e[24m. If multiple values separated by commas are
+ specified, tab stops are set at those positions, and then con-
+ tinue with the same spacing as the last two. For example,
+ \e[4m-x9,17\e[24m will set tabs at positions 9, 17, 25, 33, etc. The
+ default for \e[4mn\e[24m is 8.
+
+ -X or --no-init
+ Disables sending the termcap initialization and deinitialization
+ strings to the terminal. This is sometimes desirable if the
+ deinitialization string does something unnecessary, like clear-
+ ing the screen.
+
+ -y\e[4mn\e[24m or --max-forw-scroll=\e[4mn\e[0m
+ Specifies a maximum number of lines to scroll forward. If it is
+ necessary to scroll forward more than \e[4mn\e[24m lines, the screen is
+ repainted instead. The -c or -C option may be used to repaint
+ from the top of the screen if desired. By default, any forward
+ movement causes scrolling.
+
+ -[z]\e[4mn\e[24m or --window=\e[4mn\e[0m
+ Changes the default scrolling window size to \e[4mn\e[24m lines. The
+ default is one screenful. The z and w commands can also be used
+ to change the window size. The "z" may be omitted for compati-
+ bility with some versions of \e[4mmore.\e[24m If the number \e[4mn\e[24m is negative,
+ it indicates \e[4mn\e[24m lines less than the current screen size. For
+ example, if the screen is 24 lines, \e[4m-z-4\e[24m sets the scrolling win-
+ dow to 20 lines. If the screen is resized to 40 lines, the
+ scrolling window automatically changes to 36 lines.
+
+ -\e[4m"cc\e[24m or --quotes=\e[4mcc\e[0m
+ Changes the filename quoting character. This may be necessary
+ if you are trying to name a file which contains both spaces and
+ quote characters. Followed by a single character, this changes
+ the quote character to that character. Filenames containing a
+ space should then be surrounded by that character rather than by
+ double quotes. Followed by two characters, changes the open
+ quote to the first character, and the close quote to the second
+ character. Filenames containing a space should then be preceded
+ by the open quote character and followed by the close quote
+ character. Note that even after the quote characters are
+ changed, this option remains -" (a dash followed by a double
+ quote).
+
+ -~ or --tilde
+ Normally lines after end of file are displayed as a single tilde
+ (~). This option causes lines after end of file to be displayed
+ as blank lines.
+
+ -# or --shift
+ Specifies the default number of positions to scroll horizontally
+ in the RIGHTARROW and LEFTARROW commands. If the number speci-
+ fied is zero, it sets the default number of positions to one
+ half of the screen width. Alternately, the number may be speci-
+ fied as a fraction of the width of the screen, starting with a
+ decimal point: .5 is half of the screen width, .3 is three
+ tenths of the screen width, and so on. If the number is speci-
+ fied as a fraction, the actual number of scroll positions is
+ recalculated if the terminal window is resized, so that the
+ actual scroll remains at the specified fraction of the screen
+ width.
+
+ --follow-name
+ Normally, if the input file is renamed while an F command is
+ executing, \e[4mless\e[24m will continue to display the contents of the
+ original file despite its name change. If --follow-name is
+ specified, during an F command \e[4mless\e[24m will periodically attempt to
+ reopen the file by name. If the reopen succeeds and the file is
+ a different file from the original (which means that a new file
+ has been created with the same name as the original (now
+ renamed) file), \e[4mless\e[24m will display the contents of that new file.
+
+ --no-keypad
+ Disables sending the keypad initialization and deinitialization
+ strings to the terminal. This is sometimes useful if the keypad
+ strings make the numeric keypad behave in an undesirable manner.
+
+ --use-backslash
+ This option changes the interpretations of options which follow
+ this one. After the --use-backslash option, any backslash in an
+ option string is removed and the following character is taken
+ literally. This allows a dollar sign to be included in option
+ strings.
+
+ -- A command line argument of "--" marks the end of option argu-
+ ments. Any arguments following this are interpreted as file-
+ names. This can be useful when viewing a file whose name begins
+ with a "-" or "+".
+
+ + If a command line option begins with \e[1m+\e[22m, the remainder of that
+ option is taken to be an initial command to \e[4mless.\e[24m For example,
+ +G tells \e[4mless\e[24m to start at the end of the file rather than the
+ beginning, and +/xyz tells it to start at the first occurrence
+ of "xyz" in the file. As a special case, +<number> acts like
+ +<number>g; that is, it starts the display at the specified line
+ number (however, see the caveat under the "g" command above).
+ If the option starts with ++, the initial command applies to
+ every file being viewed, not just the first one. The + command
+ described previously may also be used to set (or change) an ini-
+ tial command for every file.
+
+
+\e[1mLINE EDITING\e[0m
+ When entering command line at the bottom of the screen (for example, a
+ filename for the :e command, or the pattern for a search command), cer-
+ tain keys can be used to manipulate the command line. Most commands
+ have an alternate form in [ brackets ] which can be used if a key does
+ not exist on a particular keyboard. (Note that the forms beginning
+ with ESC do not work in some MS-DOS and Windows systems because ESC is
+ the line erase character.) Any of these special keys may be entered
+ literally by preceding it with the "literal" character, either ^V or
+ ^A. A backslash itself may also be entered literally by entering two
+ backslashes.
+
+ LEFTARROW [ ESC-h ]
+ Move the cursor one space to the left.
+
+ RIGHTARROW [ ESC-l ]
+ Move the cursor one space to the right.
+
+ ^LEFTARROW [ ESC-b or ESC-LEFTARROW ]
+ (That is, CONTROL and LEFTARROW simultaneously.) Move the cur-
+ sor one word to the left.
+
+ ^RIGHTARROW [ ESC-w or ESC-RIGHTARROW ]
+ (That is, CONTROL and RIGHTARROW simultaneously.) Move the cur-
+ sor one word to the right.
+
+ HOME [ ESC-0 ]
+ Move the cursor to the beginning of the line.
+
+ END [ ESC-$ ]
+ Move the cursor to the end of the line.
+
+ BACKSPACE
+ Delete the character to the left of the cursor, or cancel the
+ command if the command line is empty.
+
+ DELETE or [ ESC-x ]
+ Delete the character under the cursor.
+
+ ^BACKSPACE [ ESC-BACKSPACE ]
+ (That is, CONTROL and BACKSPACE simultaneously.) Delete the
+ word to the left of the cursor.
+
+ ^DELETE [ ESC-X or ESC-DELETE ]
+ (That is, CONTROL and DELETE simultaneously.) Delete the word
+ under the cursor.
+
+ UPARROW [ ESC-k ]
+ Retrieve the previous command line. If you first enter some
+ text and then press UPARROW, it will retrieve the previous com-
+ mand which begins with that text.
+
+ DOWNARROW [ ESC-j ]
+ Retrieve the next command line. If you first enter some text
+ and then press DOWNARROW, it will retrieve the next command
+ which begins with that text.
+
+ TAB Complete the partial filename to the left of the cursor. If it
+ matches more than one filename, the first match is entered into
+ the command line. Repeated TABs will cycle thru the other
+ matching filenames. If the completed filename is a directory, a
+ "/" is appended to the filename. (On MS-DOS systems, a "\" is
+ appended.) The environment variable LESSSEPARATOR can be used
+ to specify a different character to append to a directory name.
+
+ BACKTAB [ ESC-TAB ]
+ Like, TAB, but cycles in the reverse direction thru the matching
+ filenames.
+
+ ^L Complete the partial filename to the left of the cursor. If it
+ matches more than one filename, all matches are entered into the
+ command line (if they fit).
+
+ ^U (Unix and OS/2) or ESC (MS-DOS)
+ Delete the entire command line, or cancel the command if the
+ command line is empty. If you have changed your line-kill char-
+ acter in Unix to something other than ^U, that character is used
+ instead of ^U.
+
+ ^G Delete the entire command line and return to the main prompt.
+
+
+\e[1mKEY BINDINGS\e[0m
+ You may define your own \e[4mless\e[24m commands by using the program \e[4mlesskey\e[24m (1)
+ to create a lesskey file. This file specifies a set of command keys
+ and an action associated with each key. You may also use \e[4mlesskey\e[24m to
+ change the line-editing keys (see LINE EDITING), and to set environment
+ variables. If the environment variable LESSKEY is set, \e[4mless\e[24m uses that
+ as the name of the lesskey file. Otherwise, \e[4mless\e[24m looks in a standard
+ place for the lesskey file: On Unix systems, \e[4mless\e[24m looks for a lesskey
+ file called "$HOME/.less". On MS-DOS and Windows systems, \e[4mless\e[24m looks
+ for a lesskey file called "$HOME/_less", and if it is not found there,
+ then looks for a lesskey file called "_less" in any directory specified
+ in the PATH environment variable. On OS/2 systems, \e[4mless\e[24m looks for a
+ lesskey file called "$HOME/less.ini", and if it is not found, then
+ looks for a lesskey file called "less.ini" in any directory specified
+ in the INIT environment variable, and if it not found there, then looks
+ for a lesskey file called "less.ini" in any directory specified in the
+ PATH environment variable. See the \e[4mlesskey\e[24m manual page for more
+ details.
+
+ A system-wide lesskey file may also be set up to provide key bindings.
+ If a key is defined in both a local lesskey file and in the system-wide
+ file, key bindings in the local file take precedence over those in the
+ system-wide file. If the environment variable LESSKEY_SYSTEM is set,
+ \e[4mless\e[24m uses that as the name of the system-wide lesskey file. Otherwise,
+ \e[4mless\e[24m looks in a standard place for the system-wide lesskey file: On
+ Unix systems, the system-wide lesskey file is /usr/local/etc/sysless.
+ (However, if \e[4mless\e[24m was built with a different sysconf directory than
+ /usr/local/etc, that directory is where the sysless file is found.) On
+ MS-DOS and Windows systems, the system-wide lesskey file is c:\_sys-
+ less. On OS/2 systems, the system-wide lesskey file is c:\sysless.ini.
+
+
+\e[1mINPUT PREPROCESSOR\e[0m
+ You may define an "input preprocessor" for \e[4mless.\e[24m Before \e[4mless\e[24m opens a
+ file, it first gives your input preprocessor a chance to modify the way
+ the contents of the file are displayed. An input preprocessor is sim-
+ ply an executable program (or shell script), which writes the contents
+ of the file to a different file, called the replacement file. The con-
+ tents of the replacement file are then displayed in place of the con-
+ tents of the original file. However, it will appear to the user as if
+ the original file is opened; that is, \e[4mless\e[24m will display the original
+ filename as the name of the current file.
+
+ An input preprocessor receives one command line argument, the original
+ filename, as entered by the user. It should create the replacement
+ file, and when finished, print the name of the replacement file to its
+ standard output. If the input preprocessor does not output a replace-
+ ment filename, \e[4mless\e[24m uses the original file, as normal. The input pre-
+ processor is not called when viewing standard input. To set up an
+ input preprocessor, set the LESSOPEN environment variable to a command
+ line which will invoke your input preprocessor. This command line
+ should include one occurrence of the string "%s", which will be
+ replaced by the filename when the input preprocessor command is
+ invoked.
+
+ When \e[4mless\e[24m closes a file opened in such a way, it will call another pro-
+ gram, called the input postprocessor, which may perform any desired
+ clean-up action (such as deleting the replacement file created by
+ LESSOPEN). This program receives two command line arguments, the orig-
+ inal filename as entered by the user, and the name of the replacement
+ file. To set up an input postprocessor, set the LESSCLOSE environment
+ variable to a command line which will invoke your input postprocessor.
+ It may include two occurrences of the string "%s"; the first is
+ replaced with the original name of the file and the second with the
+ name of the replacement file, which was output by LESSOPEN.
+
+ For example, on many Unix systems, these two scripts will allow you to
+ keep files in compressed format, but still let \e[4mless\e[24m view them directly:
+
+ lessopen.sh:
+ #! /bin/sh
+ case "$1" in
+ *.Z) uncompress -c $1 >/tmp/less.$$ 2>/dev/null
+ if [ -s /tmp/less.$$ ]; then
+ echo /tmp/less.$$
+ else
+ rm -f /tmp/less.$$
+ fi
+ ;;
+ esac
+
+ lessclose.sh:
+ #! /bin/sh
+ rm $2
+
+ To use these scripts, put them both where they can be executed and set
+ LESSOPEN="lessopen.sh %s", and LESSCLOSE="lessclose.sh %s %s". More
+ complex LESSOPEN and LESSCLOSE scripts may be written to accept other
+ types of compressed files, and so on.
+
+ It is also possible to set up an input preprocessor to pipe the file
+ data directly to \e[4mless,\e[24m rather than putting the data into a replacement
+ file. This avoids the need to decompress the entire file before start-
+ ing to view it. An input preprocessor that works this way is called an
+ input pipe. An input pipe, instead of writing the name of a replace-
+ ment file on its standard output, writes the entire contents of the
+ replacement file on its standard output. If the input pipe does not
+ write any characters on its standard output, then there is no replace-
+ ment file and \e[4mless\e[24m uses the original file, as normal. To use an input
+ pipe, make the first character in the LESSOPEN environment variable a
+ vertical bar (|) to signify that the input preprocessor is an input
+ pipe.
+
+ For example, on many Unix systems, this script will work like the pre-
+ vious example scripts:
+
+ lesspipe.sh:
+ #! /bin/sh
+ case "$1" in
+ *.Z) uncompress -c $1 2>/dev/null
+ *) exit 1
+ ;;
+ esac
+ exit $?
+
+ To use this script, put it where it can be executed and set
+ LESSOPEN="|lesspipe.sh %s".
+
+ Note that a preprocessor cannot output an empty file, since that is
+ interpreted as meaning there is no replacement, and the original file
+ is used. To avoid this, if LESSOPEN starts with two vertical bars, the
+ exit status of the script becomes meaningful. If the exit status is
+ zero, the output is considered to be replacement text, even if it
+ empty. If the exit status is nonzero, any output is ignored and the
+ original file is used. For compatibility with previous versions of
+ \e[4mless,\e[24m if LESSOPEN starts with only one vertical bar, the exit status of
+ the preprocessor is ignored.
+
+ When an input pipe is used, a LESSCLOSE postprocessor can be used, but
+ it is usually not necessary since there is no replacement file to clean
+ up. In this case, the replacement file name passed to the LESSCLOSE
+ postprocessor is "-".
+
+ For compatibility with previous versions of \e[4mless,\e[24m the input preproces-
+ sor or pipe is not used if \e[4mless\e[24m is viewing standard input. However, if
+ the first character of LESSOPEN is a dash (-), the input preprocessor
+ is used on standard input as well as other files. In this case, the
+ dash is not considered to be part of the preprocessor command. If
+ standard input is being viewed, the input preprocessor is passed a file
+ name consisting of a single dash. Similarly, if the first two charac-
+ ters of LESSOPEN are vertical bar and dash (|-) or two vertical bars
+ and a dash (||-), the input pipe is used on standard input as well as
+ other files. Again, in this case the dash is not considered to be part
+ of the input pipe command.
+
+
+\e[1mNATIONAL CHARACTER SETS\e[0m
+ There are three types of characters in the input file:
+
+ normal characters
+ can be displayed directly to the screen.
+
+ control characters
+ should not be displayed directly, but are expected to be found
+ in ordinary text files (such as backspace and tab).
+
+ binary characters
+ should not be displayed directly and are not expected to be
+ found in text files.
+
+ A "character set" is simply a description of which characters are to be
+ considered normal, control, and binary. The LESSCHARSET environment
+ variable may be used to select a character set. Possible values for
+ LESSCHARSET are:
+
+ ascii BS, TAB, NL, CR, and formfeed are control characters, all chars
+ with values between 32 and 126 are normal, and all others are
+ binary.
+
+ iso8859
+ Selects an ISO 8859 character set. This is the same as ASCII,
+ except characters between 160 and 255 are treated as normal
+ characters.
+
+ latin1 Same as iso8859.
+
+ latin9 Same as iso8859.
+
+ dos Selects a character set appropriate for MS-DOS.
+
+ ebcdic Selects an EBCDIC character set.
+
+ IBM-1047
+ Selects an EBCDIC character set used by OS/390 Unix Services.
+ This is the EBCDIC analogue of latin1. You get similar results
+ by setting either LESSCHARSET=IBM-1047 or LC_CTYPE=en_US in your
+ environment.
+
+ koi8-r Selects a Russian character set.
+
+ next Selects a character set appropriate for NeXT computers.
+
+ utf-8 Selects the UTF-8 encoding of the ISO 10646 character set.
+ UTF-8 is special in that it supports multi-byte characters in
+ the input file. It is the only character set that supports
+ multi-byte characters.
+
+ windows
+ Selects a character set appropriate for Microsoft Windows (cp
+ 1251).
+
+ In rare cases, it may be desired to tailor \e[4mless\e[24m to use a character set
+ other than the ones definable by LESSCHARSET. In this case, the envi-
+ ronment variable LESSCHARDEF can be used to define a character set. It
+ should be set to a string where each character in the string represents
+ one character in the character set. The character "." is used for a
+ normal character, "c" for control, and "b" for binary. A decimal num-
+ ber may be used for repetition. For example, "bccc4b." would mean
+ character 0 is binary, 1, 2 and 3 are control, 4, 5, 6 and 7 are
+ binary, and 8 is normal. All characters after the last are taken to be
+ the same as the last, so characters 9 through 255 would be normal.
+ (This is an example, and does not necessarily represent any real char-
+ acter set.)
+
+ This table shows the value of LESSCHARDEF which is equivalent to each
+ of the possible values for LESSCHARSET:
+
+ ascii 8bcccbcc18b95.b
+ dos 8bcccbcc12bc5b95.b.
+ ebcdic 5bc6bcc7bcc41b.9b7.9b5.b..8b6.10b6.b9.7b
+ 9.8b8.17b3.3b9.7b9.8b8.6b10.b.b.b.
+ IBM-1047 4cbcbc3b9cbccbccbb4c6bcc5b3cbbc4bc4bccbc
+ 191.b
+ iso8859 8bcccbcc18b95.33b.
+ koi8-r 8bcccbcc18b95.b128.
+ latin1 8bcccbcc18b95.33b.
+ next 8bcccbcc18b95.bb125.bb
+
+ If neither LESSCHARSET nor LESSCHARDEF is set, but any of the strings
+ "UTF-8", "UTF8", "utf-8" or "utf8" is found in the LC_ALL, LC_CTYPE or
+ LANG environment variables, then the default character set is utf-8.
+
+ If that string is not found, but your system supports the \e[4msetlocale\e[0m
+ interface, \e[4mless\e[24m will use setlocale to determine the character set.
+ setlocale is controlled by setting the LANG or LC_CTYPE environment
+ variables.
+
+ Finally, if the \e[4msetlocale\e[24m interface is also not available, the default
+ character set is latin1.
+
+ Control and binary characters are displayed in standout (reverse
+ video). Each such character is displayed in caret notation if possible
+ (e.g. ^A for control-A). Caret notation is used only if inverting the
+ 0100 bit results in a normal printable character. Otherwise, the char-
+ acter is displayed as a hex number in angle brackets. This format can
+ be changed by setting the LESSBINFMT environment variable. LESSBINFMT
+ may begin with a "*" and one character to select the display attribute:
+ "*k" is blinking, "*d" is bold, "*u" is underlined, "*s" is standout,
+ and "*n" is normal. If LESSBINFMT does not begin with a "*", normal
+ attribute is assumed. The remainder of LESSBINFMT is a string which
+ may include one printf-style escape sequence (a % followed by x, X, o,
+ d, etc.). For example, if LESSBINFMT is "*u[%x]", binary characters
+ are displayed in underlined hexadecimal surrounded by brackets. The
+ default if no LESSBINFMT is specified is "*s<%02X>". Warning: the
+ result of expanding the character via LESSBINFMT must be less than 31
+ characters.
+
+ When the character set is utf-8, the LESSUTFBINFMT environment variable
+ acts similarly to LESSBINFMT but it applies to Unicode code points that
+ were successfully decoded but are unsuitable for display (e.g., unas-
+ signed code points). Its default value is "<U+%04lX>". Note that
+ LESSUTFBINFMT and LESSBINFMT share their display attribute setting
+ ("*x") so specifying one will affect both; LESSUTFBINFMT is read after
+ LESSBINFMT so its setting, if any, will have priority. Problematic
+ octets in a UTF-8 file (octets of a truncated sequence, octets of a
+ complete but non-shortest form sequence, illegal octets, and stray
+ trailing octets) are displayed individually using LESSBINFMT so as to
+ facilitate diagnostic of how the UTF-8 file is ill-formed.
+
+
+\e[1mPROMPTS\e[0m
+ The -P option allows you to tailor the prompt to your preference. The
+ string given to the -P option replaces the specified prompt string.
+ Certain characters in the string are interpreted specially. The prompt
+ mechanism is rather complicated to provide flexibility, but the ordi-
+ nary user need not understand the details of constructing personalized
+ prompt strings.
+
+ A percent sign followed by a single character is expanded according to
+ what the following character is:
+
+ %b\e[4mX\e[24m Replaced by the byte offset into the current input file. The b
+ is followed by a single character (shown as \e[4mX\e[24m above) which spec-
+ ifies the line whose byte offset is to be used. If the charac-
+ ter is a "t", the byte offset of the top line in the display is
+ used, an "m" means use the middle line, a "b" means use the bot-
+ tom line, a "B" means use the line just after the bottom line,
+ and a "j" means use the "target" line, as specified by the -j
+ option.
+
+ %B Replaced by the size of the current input file.
+
+ %c Replaced by the column number of the text appearing in the first
+ column of the screen.
+
+ %d\e[4mX\e[24m Replaced by the page number of a line in the input file. The
+ line to be used is determined by the \e[4mX\e[24m, as with the %b option.
+
+ %D Replaced by the number of pages in the input file, or equiva-
+ lently, the page number of the last line in the input file.
+
+ %E Replaced by the name of the editor (from the VISUAL environment
+ variable, or the EDITOR environment variable if VISUAL is not
+ defined). See the discussion of the LESSEDIT feature below.
+
+ %f Replaced by the name of the current input file.
+
+ %F Replaced by the last component of the name of the current input
+ file.
+
+ %i Replaced by the index of the current file in the list of input
+ files.
+
+ %l\e[4mX\e[24m Replaced by the line number of a line in the input file. The
+ line to be used is determined by the \e[4mX\e[24m, as with the %b option.
+
+ %L Replaced by the line number of the last line in the input file.
+
+ %m Replaced by the total number of input files.
+
+ %p\e[4mX\e[24m Replaced by the percent into the current input file, based on
+ byte offsets. The line used is determined by the \e[4mX\e[24m as with the
+ %b option.
+
+ %P\e[4mX\e[24m Replaced by the percent into the current input file, based on
+ line numbers. The line used is determined by the \e[4mX\e[24m as with the
+ %b option.
+
+ %s Same as %B.
+
+ %t Causes any trailing spaces to be removed. Usually used at the
+ end of the string, but may appear anywhere.
+
+ %T Normally expands to the word "file". However if viewing files
+ via a tags list using the -t option, it expands to the word
+ "tag".
+
+ %x Replaced by the name of the next input file in the list.
+
+ If any item is unknown (for example, the file size if input is a pipe),
+ a question mark is printed instead.
+
+ The format of the prompt string can be changed depending on certain
+ conditions. A question mark followed by a single character acts like
+ an "IF": depending on the following character, a condition is evalu-
+ ated. If the condition is true, any characters following the question
+ mark and condition character, up to a period, are included in the
+ prompt. If the condition is false, such characters are not included.
+ A colon appearing between the question mark and the period can be used
+ to establish an "ELSE": any characters between the colon and the period
+ are included in the string if and only if the IF condition is false.
+ Condition characters (which follow a question mark) may be:
+
+ ?a True if any characters have been included in the prompt so far.
+
+ ?b\e[4mX\e[24m True if the byte offset of the specified line is known.
+
+ ?B True if the size of current input file is known.
+
+ ?c True if the text is horizontally shifted (%c is not zero).
+
+ ?d\e[4mX\e[24m True if the page number of the specified line is known.
+
+ ?e True if at end-of-file.
+
+ ?f True if there is an input filename (that is, if input is not a
+ pipe).
+
+ ?l\e[4mX\e[24m True if the line number of the specified line is known.
+
+ ?L True if the line number of the last line in the file is known.
+
+ ?m True if there is more than one input file.
+
+ ?n True if this is the first prompt in a new input file.
+
+ ?p\e[4mX\e[24m True if the percent into the current input file, based on byte
+ offsets, of the specified line is known.
+
+ ?P\e[4mX\e[24m True if the percent into the current input file, based on line
+ numbers, of the specified line is known.
+
+ ?s Same as "?B".
+
+ ?x True if there is a next input file (that is, if the current
+ input file is not the last one).
+
+ Any characters other than the special ones (question mark, colon,
+ period, percent, and backslash) become literally part of the prompt.
+ Any of the special characters may be included in the prompt literally
+ by preceding it with a backslash.
+
+ Some examples:
+
+ ?f%f:Standard input.
+
+ This prompt prints the filename, if known; otherwise the string "Stan-
+ dard input".
+
+ ?f%f .?ltLine %lt:?pt%pt\%:?btByte %bt:-...
+
+ This prompt would print the filename, if known. The filename is fol-
+ lowed by the line number, if known, otherwise the percent if known,
+ otherwise the byte offset if known. Otherwise, a dash is printed.
+ Notice how each question mark has a matching period, and how the %
+ after the %pt is included literally by escaping it with a backslash.
+
+ ?n?f%f .?m(%T %i of %m) ..?e(END) ?x- Next\: %x..%t";
+
+ This prints the filename if this is the first prompt in a file, fol-
+ lowed by the "file N of N" message if there is more than one input
+ file. Then, if we are at end-of-file, the string "(END)" is printed
+ followed by the name of the next file, if there is one. Finally, any
+ trailing spaces are truncated. This is the default prompt. For refer-
+ ence, here are the defaults for the other two prompts (-m and -M
+ respectively). Each is broken into two lines here for readability
+ only.
+
+ ?n?f%f .?m(%T %i of %m) ..?e(END) ?x- Next\: %x.:
+ ?pB%pB\%:byte %bB?s/%s...%t
+
+ ?f%f .?n?m(%T %i of %m) ..?ltlines %lt-%lb?L/%L. :
+ byte %bB?s/%s. .?e(END) ?x- Next\: %x.:?pB%pB\%..%t
+
+ And here is the default message produced by the = command:
+
+ ?f%f .?m(%T %i of %m) .?ltlines %lt-%lb?L/%L. .
+ byte %bB?s/%s. ?e(END) :?pB%pB\%..%t
+
+ The prompt expansion features are also used for another purpose: if an
+ environment variable LESSEDIT is defined, it is used as the command to
+ be executed when the v command is invoked. The LESSEDIT string is
+ expanded in the same way as the prompt strings. The default value for
+ LESSEDIT is:
+
+ %E ?lm+%lm. %f
+
+ Note that this expands to the editor name, followed by a + and the line
+ number, followed by the file name. If your editor does not accept the
+ "+linenumber" syntax, or has other differences in invocation syntax,
+ the LESSEDIT variable can be changed to modify this default.
+
+
+\e[1mSECURITY\e[0m
+ When the environment variable LESSSECURE is set to 1, \e[4mless\e[24m runs in a
+ "secure" mode. This means these features are disabled:
+
+ ! the shell command
+
+ | the pipe command
+
+ :e the examine command.
+
+ v the editing command
+
+ s -o log files
+
+ -k use of lesskey files
+
+ -t use of tags files
+
+ metacharacters in filenames, such as *
+
+ filename completion (TAB, ^L)
+
+ Less can also be compiled to be permanently in "secure" mode.
+
+
+\e[1mCOMPATIBILITY WITH MORE\e[0m
+ If the environment variable LESS_IS_MORE is set to 1, or if the program
+ is invoked via a file link named "more", \e[4mless\e[24m behaves (mostly) in con-
+ formance with the POSIX "more" command specification. In this mode,
+ less behaves differently in these ways:
+
+ The -e option works differently. If the -e option is not set, \e[4mless\e[0m
+ behaves as if the -e option were set. If the -e option is set, \e[4mless\e[0m
+ behaves as if the -E option were set.
+
+ The -m option works differently. If the -m option is not set, the
+ medium prompt is used, and it is prefixed with the string "--More--".
+ If the -m option is set, the short prompt is used.
+
+ The -n option acts like the -z option. The normal behavior of the -n
+ option is unavailable in this mode.
+
+ The parameter to the -p option is taken to be a \e[4mless\e[24m command rather
+ than a search pattern.
+
+ The LESS environment variable is ignored, and the MORE environment
+ variable is used in its place.
+
+
+\e[1mENVIRONMENT VARIABLES\e[0m
+ Environment variables may be specified either in the system environment
+ as usual, or in a \e[4mlesskey\e[24m (1) file. If environment variables are
+ defined in more than one place, variables defined in a local lesskey
+ file take precedence over variables defined in the system environment,
+ which take precedence over variables defined in the system-wide lesskey
+ file.
+
+ COLUMNS
+ Sets the number of columns on the screen. Takes precedence over
+ the number of columns specified by the TERM variable. (But if
+ you have a windowing system which supports TIOCGWINSZ or
+ WIOCGETD, the window system's idea of the screen size takes
+ precedence over the LINES and COLUMNS environment variables.)
+
+ EDITOR The name of the editor (used for the v command).
+
+ HOME Name of the user's home directory (used to find a lesskey file
+ on Unix and OS/2 systems).
+
+ HOMEDRIVE, HOMEPATH
+ Concatenation of the HOMEDRIVE and HOMEPATH environment vari-
+ ables is the name of the user's home directory if the HOME vari-
+ able is not set (only in the Windows version).
+
+ INIT Name of the user's init directory (used to find a lesskey file
+ on OS/2 systems).
+
+ LANG Language for determining the character set.
+
+ LC_CTYPE
+ Language for determining the character set.
+
+ LESS Options which are passed to \e[4mless\e[24m automatically.
+
+ LESSANSIENDCHARS
+ Characters which may end an ANSI color escape sequence (default
+ "m").
+
+ LESSANSIMIDCHARS
+ Characters which may appear between the ESC character and the
+ end character in an ANSI color escape sequence (default
+ "0123456789:;[?!"'#%()*+ ".
+
+ LESSBINFMT
+ Format for displaying non-printable, non-control characters.
+
+ LESSCHARDEF
+ Defines a character set.
+
+ LESSCHARSET
+ Selects a predefined character set.
+
+ LESSCLOSE
+ Command line to invoke the (optional) input-postprocessor.
+
+ LESSECHO
+ Name of the lessecho program (default "lessecho"). The lessecho
+ program is needed to expand metacharacters, such as * and ?, in
+ filenames on Unix systems.
+
+ LESSEDIT
+ Editor prototype string (used for the v command). See discus-
+ sion under PROMPTS.
+
+ LESSGLOBALTAGS
+ Name of the command used by the -t option to find global tags.
+ Normally should be set to "global" if your system has the \e[4mglobal\e[0m
+ (1) command. If not set, global tags are not used.
+
+ LESSHISTFILE
+ Name of the history file used to remember search commands and
+ shell commands between invocations of \e[4mless.\e[24m If set to "-" or
+ "/dev/null", a history file is not used. The default is
+ "$HOME/.lesshst" on Unix systems, "$HOME/_lesshst" on DOS and
+ Windows systems, or "$HOME/lesshst.ini" or "$INIT/lesshst.ini"
+ on OS/2 systems.
+
+ LESSHISTSIZE
+ The maximum number of commands to save in the history file. The
+ default is 100.
+
+ LESSKEY
+ Name of the default lesskey(1) file.
+
+ LESSKEY_SYSTEM
+ Name of the default system-wide lesskey(1) file.
+
+ LESSMETACHARS
+ List of characters which are considered "metacharacters" by the
+ shell.
+
+ LESSMETAESCAPE
+ Prefix which less will add before each metacharacter in a com-
+ mand sent to the shell. If LESSMETAESCAPE is an empty string,
+ commands containing metacharacters will not be passed to the
+ shell.
+
+ LESSOPEN
+ Command line to invoke the (optional) input-preprocessor.
+
+ LESSSECURE
+ Runs less in "secure" mode. See discussion under SECURITY.
+
+ LESSSEPARATOR
+ String to be appended to a directory name in filename comple-
+ tion.
+
+ LESSUTFBINFMT
+ Format for displaying non-printable Unicode code points.
+
+ LESS_IS_MORE
+ Emulate the \e[4mmore\e[24m (1) command.
+
+ LINES Sets the number of lines on the screen. Takes precedence over
+ the number of lines specified by the TERM variable. (But if you
+ have a windowing system which supports TIOCGWINSZ or WIOCGETD,
+ the window system's idea of the screen size takes precedence
+ over the LINES and COLUMNS environment variables.)
+
+ MORE Options which are passed to \e[4mless\e[24m automatically when running in
+ \e[4mmore\e[24m compatible mode.
+
+ PATH User's search path (used to find a lesskey file on MS-DOS and
+ OS/2 systems).
+
+ SHELL The shell used to execute the ! command, as well as to expand
+ filenames.
+
+ TERM The type of terminal on which \e[4mless\e[24m is being run.
+
+ VISUAL The name of the editor (used for the v command).
+
+
+\e[1mSEE ALSO\e[0m
+ lesskey(1)
+
+
+\e[1mCOPYRIGHT\e[0m
+ Copyright (C) 1984-2015 Mark Nudelman
+
+ less is part of the GNU project and is free software. You can redis-
+ tribute it and/or modify it under the terms of either (1) the GNU Gen-
+ eral Public License as published by the Free Software Foundation; or
+ (2) the Less License. See the file README in the less distribution for
+ more details regarding redistribution. You should have received a copy
+ of the GNU General Public License along with the source for less; see
+ the file COPYING. If not, write to the Free Software Foundation, 59
+ Temple Place, Suite 330, Boston, MA 02111-1307, USA. You should also
+ have received a copy of the Less License; see the file LICENSE.
+
+ less is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FIT-
+ NESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+
+
+\e[1mAUTHOR\e[0m
+ Mark Nudelman
+ Send bug reports or comments to <bug-less@gnu.org>
+ See http://www.greenwoodsoftware.com/less/bugs.html for the latest list
+ of known bugs in less.
+ For more information, see the less homepage at
+ http://www.greenwoodsoftware.com/less.
+
+
+
+ Version 481: 31 Aug 2015 LESS(1)
--- /dev/null
+.TH LESS 1 "Version 481: 31 Aug 2015"
+.SH NAME
+less \- opposite of more
+.SH SYNOPSIS
+.B "less \-?"
+.br
+.B "less \-\-help"
+.br
+.B "less \-V"
+.br
+.B "less \-\-version"
+.br
+.B "less [\-[+]aABcCdeEfFgGiIJKLmMnNqQrRsSuUVwWX~]"
+.br
+.B " [\-b \fIspace\/\fP] [\-h \fIlines\/\fP] [\-j \fIline\/\fP] [\-k \fIkeyfile\/\fP]"
+.br
+.B " [\-{oO} \fIlogfile\/\fP] [\-p \fIpattern\/\fP] [\-P \fIprompt\/\fP] [\-t \fItag\/\fP]"
+.br
+.B " [\-T \fItagsfile\/\fP] [\-x \fItab\/\fP,...] [\-y \fIlines\/\fP] [\-[z] \fIlines\/\fP]"
+.br
+.B " [\-# \fIshift\/\fP] [+[+]\fIcmd\/\fP] [\-\-] [\fIfilename\/\fP]..."
+.br
+(See the OPTIONS section for alternate option syntax with long option names.)
+
+.SH DESCRIPTION
+.I Less
+is a program similar to
+.I more
+(1), but which allows backward movement
+in the file as well as forward movement.
+Also,
+.I less
+does not have to read the entire input file before starting,
+so with large input files it starts up faster than text editors like
+.I vi
+(1).
+.I Less
+uses termcap (or terminfo on some systems),
+so it can run on a variety of terminals.
+There is even limited support for hardcopy terminals.
+(On a hardcopy terminal, lines which should be printed at the top
+of the screen are prefixed with a caret.)
+.PP
+Commands are based on both
+.I more
+and
+.I vi.
+Commands may be preceded by a decimal number,
+called N in the descriptions below.
+The number is used by some commands, as indicated.
+
+.SH COMMANDS
+In the following descriptions, ^X means control-X.
+ESC stands for the ESCAPE key; for example ESC-v means the
+two character sequence "ESCAPE", then "v".
+.IP "h or H"
+Help: display a summary of these commands.
+If you forget all the other commands, remember this one.
+.IP "SPACE or ^V or f or ^F"
+Scroll forward N lines, default one window (see option \-z below).
+If N is more than the screen size, only the final screenful is displayed.
+Warning: some systems use ^V as a special literalization character.
+.IP "z"
+Like SPACE, but if N is specified, it becomes the new window size.
+.IP "ESC-SPACE"
+Like SPACE, but scrolls a full screenful, even if it reaches
+end-of-file in the process.
+.IP "ENTER or RETURN or ^N or e or ^E or j or ^J"
+Scroll forward N lines, default 1.
+The entire N lines are displayed, even if N is more than the screen size.
+.IP "d or ^D"
+Scroll forward N lines, default one half of the screen size.
+If N is specified, it becomes the new default for
+subsequent d and u commands.
+.IP "b or ^B or ESC-v"
+Scroll backward N lines, default one window (see option \-z below).
+If N is more than the screen size, only the final screenful is displayed.
+.IP "w"
+Like ESC-v, but if N is specified, it becomes the new window size.
+.IP "y or ^Y or ^P or k or ^K"
+Scroll backward N lines, default 1.
+The entire N lines are displayed, even if N is more than the screen size.
+Warning: some systems use ^Y as a special job control character.
+.IP "u or ^U"
+Scroll backward N lines, default one half of the screen size.
+If N is specified, it becomes the new default for
+subsequent d and u commands.
+.IP "J"
+Like j, but continues to scroll beyond the end of the file.
+.IP "K or Y"
+Like k, but continues to scroll beyond the beginning of the file.
+.IP "ESC-) or RIGHTARROW"
+Scroll horizontally right N characters, default half the screen width
+(see the \-# option).
+If a number N is specified, it becomes the default for future RIGHTARROW
+and LEFTARROW commands.
+While the text is scrolled, it acts as though the \-S option
+(chop lines) were in effect.
+.IP "ESC-( or LEFTARROW"
+Scroll horizontally left N characters, default half the screen width
+(see the \-# option).
+If a number N is specified, it becomes the default for future RIGHTARROW
+and LEFTARROW commands.
+.IP "r or ^R or ^L"
+Repaint the screen.
+.IP R
+Repaint the screen, discarding any buffered input.
+Useful if the file is changing while it is being viewed.
+.IP "F"
+Scroll forward, and keep trying to read when the
+end of file is reached.
+Normally this command would be used when already at the end of the file.
+It is a way to monitor the tail of a file which is growing
+while it is being viewed.
+(The behavior is similar to the "tail \-f" command.)
+.IP "ESC-F"
+Like F, but as soon as a line is found which matches
+the last search pattern, the terminal bell is rung
+and forward scrolling stops.
+.IP "g or < or ESC-<"
+Go to line N in the file, default 1 (beginning of file).
+(Warning: this may be slow if N is large.)
+.IP "G or > or ESC->"
+Go to line N in the file, default the end of the file.
+(Warning: this may be slow if N is large,
+or if N is not specified and
+standard input, rather than a file, is being read.)
+.IP "ESC-G"
+Same as G, except if no number N is specified and the input is standard input,
+goes to the last line which is currently buffered.
+.IP "p or %"
+Go to a position N percent into the file.
+N should be between 0 and 100, and may contain a decimal point.
+.IP "P"
+Go to the line containing byte offset N in the file.
+.IP "{"
+If a left curly bracket appears in the top line displayed
+on the screen,
+the { command will go to the matching right curly bracket.
+The matching right curly bracket is positioned on the bottom
+line of the screen.
+If there is more than one left curly bracket on the top line,
+a number N may be used to specify the N-th bracket on the line.
+.IP "}"
+If a right curly bracket appears in the bottom line displayed
+on the screen,
+the } command will go to the matching left curly bracket.
+The matching left curly bracket is positioned on the top
+line of the screen.
+If there is more than one right curly bracket on the top line,
+a number N may be used to specify the N-th bracket on the line.
+.IP "("
+Like {, but applies to parentheses rather than curly brackets.
+.IP ")"
+Like }, but applies to parentheses rather than curly brackets.
+.IP "["
+Like {, but applies to square brackets rather than curly brackets.
+.IP "]"
+Like }, but applies to square brackets rather than curly brackets.
+.IP "ESC-^F"
+Followed by two characters,
+acts like {, but uses the two characters as open and close brackets,
+respectively.
+For example, "ESC ^F < >" could be used to
+go forward to the > which matches the < in the top displayed line.
+.IP "ESC-^B"
+Followed by two characters,
+acts like }, but uses the two characters as open and close brackets,
+respectively.
+For example, "ESC ^B < >" could be used to
+go backward to the < which matches the > in the bottom displayed line.
+.IP m
+Followed by any lowercase letter,
+marks the current position with that letter.
+.IP "'"
+(Single quote.)
+Followed by any lowercase letter, returns to the position which
+was previously marked with that letter.
+Followed by another single quote, returns to the position at
+which the last "large" movement command was executed.
+Followed by a ^ or $, jumps to the beginning or end of the
+file respectively.
+Marks are preserved when a new file is examined,
+so the ' command can be used to switch between input files.
+.IP "^X^X"
+Same as single quote.
+.IP /pattern
+Search forward in the file for the N-th line containing the pattern.
+N defaults to 1.
+The pattern is a regular expression, as recognized by
+the regular expression library supplied by your system.
+The search starts at the first line displayed
+(but see the \-a and \-j options, which change this).
+.sp
+Certain characters are special
+if entered at the beginning of the pattern;
+they modify the type of search rather than become part of the pattern:
+.RS
+.IP "^N or !"
+Search for lines which do NOT match the pattern.
+.IP "^E or *"
+Search multiple files.
+That is, if the search reaches the END of the current file
+without finding a match,
+the search continues in the next file in the command line list.
+.IP "^F or @"
+Begin the search at the first line of the FIRST file
+in the command line list,
+regardless of what is currently displayed on the screen
+or the settings of the \-a or \-j options.
+.IP "^K"
+Highlight any text which matches the pattern on the current screen,
+but don't move to the first match (KEEP current position).
+.IP "^R"
+Don't interpret regular expression metacharacters;
+that is, do a simple textual comparison.
+.RE
+.IP ?pattern
+Search backward in the file for the N-th line containing the pattern.
+The search starts at the last line displayed
+(but see the \-a and \-j options, which change this).
+.sp
+Certain characters are special as in the / command:
+.RS
+.IP "^N or !"
+Search for lines which do NOT match the pattern.
+.IP "^E or *"
+Search multiple files.
+That is, if the search reaches the beginning of the current file
+without finding a match,
+the search continues in the previous file in the command line list.
+.IP "^F or @"
+Begin the search at the last line of the last file
+in the command line list,
+regardless of what is currently displayed on the screen
+or the settings of the \-a or \-j options.
+.IP "^K"
+As in forward searches.
+.IP "^R"
+As in forward searches.
+.RE
+.IP "ESC-/pattern"
+Same as "/*".
+.IP "ESC-?pattern"
+Same as "?*".
+.IP n
+Repeat previous search, for N-th line containing the last pattern.
+If the previous search was modified by ^N, the search is made for the
+N-th line NOT containing the pattern.
+If the previous search was modified by ^E, the search continues
+in the next (or previous) file if not satisfied in the current file.
+If the previous search was modified by ^R, the search is done
+without using regular expressions.
+There is no effect if the previous search was modified by ^F or ^K.
+.IP N
+Repeat previous search, but in the reverse direction.
+.IP "ESC-n"
+Repeat previous search, but crossing file boundaries.
+The effect is as if the previous search were modified by *.
+.IP "ESC-N"
+Repeat previous search, but in the reverse direction
+and crossing file boundaries.
+.IP "ESC-u"
+Undo search highlighting.
+Turn off highlighting of strings matching the current search pattern.
+If highlighting is already off because of a previous ESC-u command,
+turn highlighting back on.
+Any search command will also turn highlighting back on.
+(Highlighting can also be disabled by toggling the \-G option;
+in that case search commands do not turn highlighting back on.)
+.IP "&pattern"
+Display only lines which match the pattern;
+lines which do not match the pattern are not displayed.
+If pattern is empty (if you type & immediately followed by ENTER),
+any filtering is turned off, and all lines are displayed.
+While filtering is in effect, an ampersand is displayed at the
+beginning of the prompt,
+as a reminder that some lines in the file may be hidden.
+.sp
+Certain characters are special as in the / command:
+.RS
+.IP "^N or !"
+Display only lines which do NOT match the pattern.
+.IP "^R"
+Don't interpret regular expression metacharacters;
+that is, do a simple textual comparison.
+.RE
+.IP ":e [filename]"
+Examine a new file.
+If the filename is missing, the "current" file (see the :n and :p commands
+below) from the list of files in the command line is re-examined.
+A percent sign (%) in the filename is replaced by the name of the
+current file.
+A pound sign (#) is replaced by the name of the previously examined file.
+However, two consecutive percent signs are simply
+replaced with a single percent sign.
+This allows you to enter a filename that contains a percent sign
+in the name.
+Similarly, two consecutive pound signs are replaced with a single pound sign.
+The filename is inserted into the command line list of files
+so that it can be seen by subsequent :n and :p commands.
+If the filename consists of several files, they are all inserted into
+the list of files and the first one is examined.
+If the filename contains one or more spaces,
+the entire filename should be enclosed in double quotes
+(also see the \-" option).
+.IP "^X^V or E"
+Same as :e.
+Warning: some systems use ^V as a special literalization character.
+On such systems, you may not be able to use ^V.
+.IP ":n"
+Examine the next file (from the list of files given in the command line).
+If a number N is specified, the N-th next file is examined.
+.IP ":p"
+Examine the previous file in the command line list.
+If a number N is specified, the N-th previous file is examined.
+.IP ":x"
+Examine the first file in the command line list.
+If a number N is specified, the N-th file in the list is examined.
+.IP ":d"
+Remove the current file from the list of files.
+.IP "t"
+Go to the next tag, if there were more than one matches for the current tag.
+See the \-t option for more details about tags.
+.IP "T"
+Go to the previous tag, if there were more than one matches for the current tag.
+.IP "= or ^G or :f"
+Prints some information about the file being viewed,
+including its name
+and the line number and byte offset of the bottom line being displayed.
+If possible, it also prints the length of the file,
+the number of lines in the file
+and the percent of the file above the last displayed line.
+.IP \-
+Followed by one of the command line option letters (see OPTIONS below),
+this will change the setting of that option
+and print a message describing the new setting.
+If a ^P (CONTROL-P) is entered immediately after the dash,
+the setting of the option is changed but no message is printed.
+If the option letter has a numeric value (such as \-b or \-h),
+or a string value (such as \-P or \-t),
+a new value may be entered after the option letter.
+If no new value is entered, a message describing
+the current setting is printed and nothing is changed.
+.IP \-\-
+Like the \- command, but takes a long option name (see OPTIONS below)
+rather than a single option letter.
+You must press ENTER or RETURN after typing the option name.
+A ^P immediately after the second dash suppresses printing of a
+message describing the new setting, as in the \- command.
+.IP \-+
+Followed by one of the command line option letters
+this will reset the option to its default setting
+and print a message describing the new setting.
+(The "\-+\fIX\fP" command does the same thing
+as "\-+\fIX\fP" on the command line.)
+This does not work for string-valued options.
+.IP \-\-+
+Like the \-+ command, but takes a long option name
+rather than a single option letter.
+.IP \-!
+Followed by one of the command line option letters,
+this will reset the option to the "opposite" of its default setting
+and print a message describing the new setting.
+This does not work for numeric or string-valued options.
+.IP \-\-!
+Like the \-! command, but takes a long option name
+rather than a single option letter.
+.IP _
+(Underscore.)
+Followed by one of the command line option letters,
+this will print a message describing the current setting of that option.
+The setting of the option is not changed.
+.IP __
+(Double underscore.)
+Like the _ (underscore) command, but takes a long option name
+rather than a single option letter.
+You must press ENTER or RETURN after typing the option name.
+.IP +cmd
+Causes the specified cmd to be executed each time a new file is examined.
+For example, +G causes
+.I less
+to initially display each file starting at the end
+rather than the beginning.
+.IP V
+Prints the version number of
+.I less
+being run.
+.IP "q or Q or :q or :Q or ZZ"
+Exits
+.I less.
+.PP
+The following
+four
+commands may or may not be valid, depending on your particular installation.
+.PP
+.IP v
+Invokes an editor to edit the current file being viewed.
+The editor is taken from the environment variable VISUAL if defined,
+or EDITOR if VISUAL is not defined,
+or defaults to "vi" if neither VISUAL nor EDITOR is defined.
+See also the discussion of LESSEDIT under the section on PROMPTS below.
+.IP "! shell-command"
+Invokes a shell to run the shell-command given.
+A percent sign (%) in the command is replaced by the name of the
+current file.
+A pound sign (#) is replaced by the name of the previously examined file.
+"!!" repeats the last shell command.
+"!" with no shell command simply invokes a shell.
+On Unix systems, the shell is taken from the environment variable SHELL,
+or defaults to "sh".
+On MS-DOS and OS/2 systems, the shell is the normal command processor.
+.IP "| <m> shell-command"
+<m> represents any mark letter.
+Pipes a section of the input file to the given shell command.
+The section of the file to be piped is between the first line on
+the current screen and the position marked by the letter.
+<m> may also be ^ or $ to indicate beginning or end of file respectively.
+If <m> is \&.\& or newline, the current screen is piped.
+.IP "s filename"
+Save the input to a file.
+This only works if the input is a pipe, not an ordinary file.
+.PP
+.SH OPTIONS
+Command line options are described below.
+Most options may be changed while
+.I less
+is running, via the "\-" command.
+.PP
+Most options may be given in one of two forms:
+either a dash followed by a single letter,
+or two dashes followed by a long option name.
+A long option name may be abbreviated as long as
+the abbreviation is unambiguous.
+For example, \-\-quit-at-eof may be abbreviated \-\-quit, but not
+\-\-qui, since both \-\-quit-at-eof and \-\-quiet begin with \-\-qui.
+Some long option names are in uppercase, such as \-\-QUIT-AT-EOF, as
+distinct from \-\-quit-at-eof.
+Such option names need only have their first letter capitalized;
+the remainder of the name may be in either case.
+For example, \-\-Quit-at-eof is equivalent to \-\-QUIT-AT-EOF.
+.PP
+Options are also taken from the environment variable "LESS".
+For example,
+to avoid typing "less \-options \&...\&" each time
+.I less
+is invoked, you might tell
+.I csh:
+.sp
+setenv LESS "\-options"
+.sp
+or if you use
+.I sh:
+.sp
+LESS="\-options"; export LESS
+.sp
+On MS-DOS, you don't need the quotes, but you should replace any
+percent signs in the options string by double percent signs.
+.sp
+The environment variable is parsed before the command line,
+so command line options override the LESS environment variable.
+If an option appears in the LESS variable, it can be reset
+to its default value on the command line by beginning the command
+line option with "\-+".
+.sp
+Some options like \-k or \-D require a string to follow the option letter.
+The string for that option is considered to end when a dollar sign ($) is found.
+For example, you can set two \-D options on MS-DOS like this:
+.sp
+LESS="Dn9.1$Ds4.1"
+.sp
+If the \-\-use-backslash option appears earlier in the options, then
+a dollar sign or backslash may be included literally in an option string
+by preceding it with a backslash.
+If the \-\-use-backslash option is not in effect, then backslashes are
+not treated specially, and there is no way to include a dollar sign
+in the option string.
+.IP "\-? or \-\-help"
+This option displays a summary of the commands accepted by
+.I less
+(the same as the h command).
+(Depending on how your shell interprets the question mark,
+it may be necessary to quote the question mark, thus: "\-\e?".)
+.IP "\-a or \-\-search-skip-screen"
+By default, forward searches start at the top of the displayed screen
+and backwards searches start at the bottom of the displayed screen
+(except for repeated searches invoked by the n or N commands,
+which start after or before the "target" line respectively;
+see the \-j option for more about the target line).
+The \-a option causes forward searches to instead start at
+the bottom of the screen
+and backward searches to start at the top of the screen,
+thus skipping all lines displayed on the screen.
+.IP "\-A or \-\-SEARCH-SKIP-SCREEN"
+Causes all forward searches (not just non-repeated searches)
+to start just after the target line, and all backward searches
+to start just before the target line.
+Thus, forward searches will skip part of the displayed screen
+(from the first line up to and including the target line).
+Similarly backwards searches will skip the displayed screen
+from the last line up to and including the target line.
+This was the default behavior in less versions prior to 441.
+.IP "\-b\fIn\fP or \-\-buffers=\fIn\fP"
+Specifies the amount of buffer space
+.I less
+will use for each file, in units of kilobytes (1024 bytes).
+By default 64\ K of buffer space is used for each file
+(unless the file is a pipe; see the \-B option).
+The \-b option specifies instead that \fIn\fP kilobytes of
+buffer space should be used for each file.
+If \fIn\fP is \-1, buffer space is unlimited; that is,
+the entire file can be read into memory.
+.IP "\-B or \-\-auto-buffers"
+By default, when data is read from a pipe,
+buffers are allocated automatically as needed.
+If a large amount of data is read from the pipe, this can cause
+a large amount of memory to be allocated.
+The \-B option disables this automatic allocation of buffers for pipes,
+so that only 64\ K
+(or the amount of space specified by the \-b option)
+is used for the pipe.
+Warning: use of \-B can result in erroneous display, since only the
+most recently viewed part of the piped data is kept in memory;
+any earlier data is lost.
+.IP "\-c or \-\-clear-screen"
+Causes full screen repaints to be painted from the top line down.
+By default,
+full screen repaints are done by scrolling from the bottom of the screen.
+.IP "\-C or \-\-CLEAR-SCREEN"
+Same as \-c, for compatibility with older versions of
+.I less.
+.IP "\-d or \-\-dumb"
+The \-d option suppresses the error message
+normally displayed if the terminal is dumb;
+that is, lacks some important capability,
+such as the ability to clear the screen or scroll backward.
+The \-d option does not otherwise change the behavior of
+.I less
+on a dumb terminal.
+.IP "\-D\fBx\fP\fIcolor\fP or \-\-color=\fBx\fP\fIcolor\fP"
+[MS-DOS only]
+Sets the color of the text displayed.
+\fBx\fP is a single character which selects the type of text whose color is
+being set: n=normal, s=standout, d=bold, u=underlined, k=blink.
+\fIcolor\fP is a pair of numbers separated by a period.
+The first number selects the foreground color and the second selects
+the background color of the text.
+A single number \fIN\fP is the same as \fIN.M\fP,
+where \fIM\fP is the normal background color.
+
+.IP "\-e or \-\-quit-at-eof"
+Causes
+.I less
+to automatically exit
+the second time it reaches end-of-file.
+By default, the only way to exit
+.I less
+is via the "q" command.
+.IP "\-E or \-\-QUIT-AT-EOF"
+Causes
+.I less
+to automatically exit the first time it reaches end-of-file.
+.IP "\-f or \-\-force"
+Forces non-regular files to be opened.
+(A non-regular file is a directory or a device special file.)
+Also suppresses the warning message when a binary file is opened.
+By default,
+.I less
+will refuse to open non-regular files.
+Note that some operating systems will not allow directories
+to be read, even if \-f is set.
+.IP "\-F or \-\-quit-if-one-screen"
+Causes
+.I less
+to automatically exit
+if the entire file can be displayed on the first screen.
+.IP "\-g or \-\-hilite-search"
+Normally,
+.I less
+will highlight ALL strings which match the last search command.
+The \-g option changes this behavior to highlight only the particular string
+which was found by the last search command.
+This can cause
+.I less
+to run somewhat faster than the default.
+.IP "\-G or \-\-HILITE-SEARCH"
+The \-G option suppresses all highlighting of strings found by search commands.
+.IP "\-h\fIn\fP or \-\-max-back-scroll=\fIn\fP"
+Specifies a maximum number of lines to scroll backward.
+If it is necessary to scroll backward more than \fIn\fP lines,
+the screen is repainted in a forward direction instead.
+(If the terminal does not have the ability to scroll
+backward, \-h0 is implied.)
+.IP "\-i or \-\-ignore-case"
+Causes searches to ignore case; that is,
+uppercase and lowercase are considered identical.
+This option is ignored if any uppercase letters
+appear in the search pattern;
+in other words,
+if a pattern contains uppercase letters, then that search does not ignore case.
+.IP "\-I or \-\-IGNORE-CASE"
+Like \-i, but searches ignore case even if
+the pattern contains uppercase letters.
+.IP "\-j\fIn\fP or \-\-jump-target=\fIn\fP"
+Specifies a line on the screen where the "target" line
+is to be positioned.
+The target line is the line specified by any command to
+search for a pattern, jump to a line number,
+jump to a file percentage or jump to a tag.
+The screen line may be specified by a number: the top line on the screen
+is 1, the next is 2, and so on.
+The number may be negative to specify a line relative to the bottom
+of the screen: the bottom line on the screen is \-1, the second
+to the bottom is \-2, and so on.
+Alternately, the screen line may be specified as a fraction of the height
+of the screen, starting with a decimal point: \&.5 is in the middle of the
+screen, \&.3 is three tenths down from the first line, and so on.
+If the line is specified as a fraction, the actual line number
+is recalculated if the terminal window is resized, so that the
+target line remains at the specified fraction of the screen height.
+If any form of the \-j option is used,
+repeated forward searches (invoked with "n" or "N")
+begin at the line immediately after the target line,
+and repeated backward searches begin at the target line,
+unless changed by \-a or \-A.
+For example, if "\-j4" is used, the target line is the
+fourth line on the screen, so forward searches begin at the fifth line
+on the screen.
+However nonrepeated searches (invoked with "/" or "?")
+always begin at the start or end of the current screen respectively.
+.IP "\-J or \-\-status-column"
+Displays a status column at the left edge of the screen.
+The status column shows the lines that matched the current search.
+The status column is also used if the \-w or \-W option is in effect.
+.IP "\-k\fIfilename\fP or \-\-lesskey-file=\fIfilename\fP"
+Causes
+.I less
+to open and interpret the named file as a
+.I lesskey
+(1) file.
+Multiple \-k options may be specified.
+If the LESSKEY or LESSKEY_SYSTEM environment variable is set, or
+if a lesskey file is found in a standard place (see KEY BINDINGS),
+it is also used as a
+.I lesskey
+file.
+.IP "\-K or \-\-quit-on-intr"
+Causes
+.I less
+to exit immediately (with status 2)
+when an interrupt character (usually ^C) is typed.
+Normally, an interrupt character causes
+.I less
+to stop whatever it is doing and return to its command prompt.
+Note that use of this option makes it impossible to return to the
+command prompt from the "F" command.
+.IP "\-L or \-\-no-lessopen"
+Ignore the LESSOPEN environment variable
+(see the INPUT PREPROCESSOR section below).
+This option can be set from within \fIless\fP,
+but it will apply only to files opened subsequently, not to the
+file which is currently open.
+.IP "\-m or \-\-long-prompt"
+Causes
+.I less
+to prompt verbosely (like \fImore\fP),
+with the percent into the file.
+By default,
+.I less
+prompts with a colon.
+.IP "\-M or \-\-LONG-PROMPT"
+Causes
+.I less
+to prompt even more verbosely than
+.I more.
+.IP "\-n or \-\-line-numbers"
+Suppresses line numbers.
+The default (to use line numbers) may cause
+.I less
+to run more slowly in some cases, especially with a very large input file.
+Suppressing line numbers with the \-n option will avoid this problem.
+Using line numbers means: the line number will be displayed in the verbose
+prompt and in the = command,
+and the v command will pass the current line number to the editor
+(see also the discussion of LESSEDIT in PROMPTS below).
+.IP "\-N or \-\-LINE-NUMBERS"
+Causes a line number to be displayed at the beginning of
+each line in the display.
+.IP "\-o\fIfilename\fP or \-\-log-file=\fIfilename\fP"
+Causes
+.I less
+to copy its input to the named file as it is being viewed.
+This applies only when the input file is a pipe,
+not an ordinary file.
+If the file already exists,
+.I less
+will ask for confirmation before overwriting it.
+.IP "\-O\fIfilename\fP or \-\-LOG-FILE=\fIfilename\fP"
+The \-O option is like \-o, but it will overwrite an existing
+file without asking for confirmation.
+.sp
+If no log file has been specified,
+the \-o and \-O options can be used from within
+.I less
+to specify a log file.
+Without a file name, they will simply report the name of the log file.
+The "s" command is equivalent to specifying \-o from within
+.I less.
+.IP "\-p\fIpattern\fP or \-\-pattern=\fIpattern\fP"
+The \-p option on the command line is equivalent to
+specifying +/\fIpattern\fP;
+that is, it tells
+.I less
+to start at the first occurrence of \fIpattern\fP in the file.
+.IP "\-P\fIprompt\fP or \-\-prompt=\fIprompt\fP"
+Provides a way to tailor the three prompt
+styles to your own preference.
+This option would normally be put in the LESS environment
+variable, rather than being typed in with each
+.I less
+command.
+Such an option must either be the last option in the LESS variable,
+or be terminated by a dollar sign.
+ \-Ps followed by a string changes the default (short) prompt
+to that string.
+ \-Pm changes the medium (\-m) prompt.
+ \-PM changes the long (\-M) prompt.
+ \-Ph changes the prompt for the help screen.
+ \-P= changes the message printed by the = command.
+ \-Pw changes the message printed while waiting for data (in the F command).
+All prompt strings consist of a sequence of
+letters and special escape sequences.
+See the section on PROMPTS for more details.
+.IP "\-q or \-\-quiet or \-\-silent"
+Causes moderately "quiet" operation:
+the terminal bell is not rung
+if an attempt is made to scroll past the end of the file
+or before the beginning of the file.
+If the terminal has a "visual bell", it is used instead.
+The bell will be rung on certain other errors,
+such as typing an invalid character.
+The default is to ring the terminal bell in all such cases.
+.IP "\-Q or \-\-QUIET or \-\-SILENT"
+Causes totally "quiet" operation:
+the terminal bell is never rung.
+.IP "\-r or \-\-raw-control-chars"
+Causes "raw" control characters to be displayed.
+The default is to display control characters using the caret notation;
+for example, a control-A (octal 001) is displayed as "^A".
+Warning: when the \-r option is used,
+.I less
+cannot keep track of the actual appearance of the screen
+(since this depends on how the screen responds to
+each type of control character).
+Thus, various display problems may result,
+such as long lines being split in the wrong place.
+.IP "\-R or \-\-RAW-CONTROL-CHARS"
+Like \-r, but only ANSI "color" escape sequences are output in "raw" form.
+Unlike \-r, the screen appearance is maintained correctly in most cases.
+ANSI "color" escape sequences are sequences of the form:
+.sp
+ ESC [ \&...\& m
+.sp
+where the "...\&" is zero or more color specification characters
+For the purpose of keeping track of screen appearance,
+ANSI color escape sequences are assumed to not move the cursor.
+You can make
+.I less
+think that characters other than "m" can end ANSI color escape sequences
+by setting the environment variable LESSANSIENDCHARS to the list of
+characters which can end a color escape sequence.
+And you can make
+.I less
+think that characters other than the standard ones may appear between
+the ESC and the m by setting the environment variable LESSANSIMIDCHARS
+to the list of characters which can appear.
+.IP "\-s or \-\-squeeze-blank-lines"
+Causes consecutive blank lines to be squeezed into a single blank line.
+This is useful when viewing
+.I nroff
+output.
+.IP "\-S or \-\-chop-long-lines"
+Causes lines longer than the screen width to be
+chopped (truncated) rather than wrapped.
+That is, the portion of a long line that does not fit in
+the screen width is not shown.
+The default is to wrap long lines; that is, display the remainder
+on the next line.
+.IP "\-t\fItag\fP or \-\-tag=\fItag\fP"
+The \-t option, followed immediately by a TAG,
+will edit the file containing that tag.
+For this to work, tag information must be available;
+for example, there may be a file in the current directory called "tags",
+which was previously built by
+.I ctags
+(1) or an equivalent command.
+If the environment variable LESSGLOBALTAGS is set, it is taken to be
+the name of a command compatible with
+.I global
+(1), and that command is executed to find the tag.
+(See http://www.gnu.org/software/global/global.html).
+The \-t option may also be specified from within
+.I less
+(using the \- command) as a way of examining a new file.
+The command ":t" is equivalent to specifying \-t from within
+.I less.
+.IP "\-T\fItagsfile\fP or \-\-tag-file=\fItagsfile\fP"
+Specifies a tags file to be used instead of "tags".
+.IP "\-u or \-\-underline-special"
+Causes backspaces and carriage returns to be treated as printable characters;
+that is, they are sent to the terminal when they appear in the input.
+.IP "\-U or \-\-UNDERLINE-SPECIAL"
+Causes backspaces, tabs and carriage returns to be
+treated as control characters;
+that is, they are handled as specified by the \-r option.
+.sp
+By default, if neither \-u nor \-U is given,
+backspaces which appear adjacent to an underscore character
+are treated specially:
+the underlined text is displayed
+using the terminal's hardware underlining capability.
+Also, backspaces which appear between two identical characters
+are treated specially:
+the overstruck text is printed
+using the terminal's hardware boldface capability.
+Other backspaces are deleted, along with the preceding character.
+Carriage returns immediately followed by a newline are deleted.
+Other carriage returns are handled as specified by the \-r option.
+Text which is overstruck or underlined can be searched for
+if neither \-u nor \-U is in effect.
+.IP "\-V or \-\-version"
+Displays the version number of
+.I less.
+.IP "\-w or \-\-hilite-unread"
+Temporarily highlights the first "new" line after a forward movement
+of a full page.
+The first "new" line is the line immediately following the line previously
+at the bottom of the screen.
+Also highlights the target line after a g or p command.
+The highlight is removed at the next command which causes movement.
+The entire line is highlighted, unless the \-J option is in effect,
+in which case only the status column is highlighted.
+.IP "\-W or \-\-HILITE-UNREAD"
+Like \-w, but temporarily highlights the first new line after any
+forward movement command larger than one line.
+.IP "\-x\fIn\fP,...\& or \-\-tabs=\fIn\fP,..."
+Sets tab stops.
+If only one \fIn\fP is specified, tab stops are set at multiples of \fIn\fP.
+If multiple values separated by commas are specified, tab stops
+are set at those positions, and then continue with the same spacing as the
+last two.
+For example, \fI-x9,17\fP will set tabs at positions 9, 17, 25, 33, etc.
+The default for \fIn\fP is 8.
+.IP "\-X or \-\-no-init"
+Disables sending the termcap initialization and deinitialization strings
+to the terminal.
+This is sometimes desirable if the deinitialization string does
+something unnecessary, like clearing the screen.
+.IP "\-y\fIn\fP or \-\-max-forw-scroll=\fIn\fP"
+Specifies a maximum number of lines to scroll forward.
+If it is necessary to scroll forward more than \fIn\fP lines,
+the screen is repainted instead.
+The \-c or \-C option may be used to repaint from the top of
+the screen if desired.
+By default, any forward movement causes scrolling.
+.IP "\-[z]\fIn\fP or \-\-window=\fIn\fP"
+Changes the default scrolling window size to \fIn\fP lines.
+The default is one screenful.
+The z and w commands can also be used to change the window size.
+The "z" may be omitted for compatibility with some versions of
+.I more.
+If the number
+.I n
+is negative, it indicates
+.I n
+lines less than the current screen size.
+For example, if the screen is 24 lines, \fI\-z\-4\fP sets the
+scrolling window to 20 lines. If the screen is resized to 40 lines,
+the scrolling window automatically changes to 36 lines.
+.IP "\-\fI\(dqcc\fP\ or\ \-\-quotes=\fIcc\fP"
+Changes the filename quoting character.
+This may be necessary if you are trying to name a file
+which contains both spaces and quote characters.
+Followed by a single character, this changes the quote character to that
+character.
+Filenames containing a space should then be surrounded by that character
+rather than by double quotes.
+Followed by two characters, changes the open quote to the first character,
+and the close quote to the second character.
+Filenames containing a space should then be preceded by the open quote
+character and followed by the close quote character.
+Note that even after the quote characters are changed, this option
+remains \-" (a dash followed by a double quote).
+.IP "\-~ or \-\-tilde"
+Normally lines after end of file are displayed as a single tilde (~).
+This option causes lines after end of file to be displayed as blank lines.
+.IP "\-# or \-\-shift"
+Specifies the default number of positions to scroll horizontally
+in the RIGHTARROW and LEFTARROW commands.
+If the number specified is zero, it sets the default number of
+positions to one half of the screen width.
+Alternately, the number may be specified as a fraction of the width
+of the screen, starting with a decimal point: \&.5 is half of the
+screen width, \&.3 is three tenths of the screen width, and so on.
+If the number is specified as a fraction, the actual number of
+scroll positions is recalculated if the terminal window is resized,
+so that the actual scroll remains at the specified fraction
+of the screen width.
+.IP "\-\-follow-name"
+Normally, if the input file is renamed while an F command is executing,
+.I less
+will continue to display the contents of the original file despite
+its name change.
+If \-\-follow-name is specified, during an F command
+.I less
+will periodically attempt to reopen the file by name.
+If the reopen succeeds and the file is a different file from the original
+(which means that a new file has been created
+with the same name as the original (now renamed) file),
+.I less
+will display the contents of that new file.
+.IP "\-\-no-keypad"
+Disables sending the keypad initialization and deinitialization strings
+to the terminal.
+This is sometimes useful if the keypad strings make the numeric
+keypad behave in an undesirable manner.
+.IP "\-\-use-backslash"
+This option changes the interpretations of options which follow this one.
+After the \-\-use-backslash option, any backslash in an option string is
+removed and the following character is taken literally.
+This allows a dollar sign to be included in option strings.
+.IP \-\-
+A command line argument of "\-\-" marks the end of option arguments.
+Any arguments following this are interpreted as filenames.
+This can be useful when viewing a file whose name begins with a "\-" or "+".
+.IP +
+If a command line option begins with \fB+\fP,
+the remainder of that option is taken to be an initial command to
+.I less.
+For example, +G tells
+.I less
+to start at the end of the file rather than the beginning,
+and +/xyz tells it to start at the first occurrence of "xyz" in the file.
+As a special case, +<number> acts like +<number>g;
+that is, it starts the display at the specified line number
+(however, see the caveat under the "g" command above).
+If the option starts with ++, the initial command applies to
+every file being viewed, not just the first one.
+The + command described previously
+may also be used to set (or change) an initial command for every file.
+
+.SH "LINE EDITING"
+When entering command line at the bottom of the screen
+(for example, a filename for the :e command,
+or the pattern for a search command),
+certain keys can be used to manipulate the command line.
+Most commands have an alternate form in [ brackets ] which can be used if
+a key does not exist on a particular keyboard.
+(Note that the forms beginning with ESC do not work
+in some MS-DOS and Windows systems because ESC is the line erase character.)
+Any of these special keys may be entered literally by preceding
+it with the "literal" character, either ^V or ^A.
+A backslash itself may also be entered literally by entering two backslashes.
+.IP "LEFTARROW [ ESC-h ]"
+Move the cursor one space to the left.
+.IP "RIGHTARROW [ ESC-l ]"
+Move the cursor one space to the right.
+.IP "^LEFTARROW [ ESC-b or ESC-LEFTARROW ]"
+(That is, CONTROL and LEFTARROW simultaneously.)
+Move the cursor one word to the left.
+.IP "^RIGHTARROW [ ESC-w or ESC-RIGHTARROW ]"
+(That is, CONTROL and RIGHTARROW simultaneously.)
+Move the cursor one word to the right.
+.IP "HOME [ ESC-0 ]"
+Move the cursor to the beginning of the line.
+.IP "END [ ESC-$ ]"
+Move the cursor to the end of the line.
+.IP "BACKSPACE"
+Delete the character to the left of the cursor,
+or cancel the command if the command line is empty.
+.IP "DELETE or [ ESC-x ]"
+Delete the character under the cursor.
+.IP "^BACKSPACE [ ESC-BACKSPACE ]"
+(That is, CONTROL and BACKSPACE simultaneously.)
+Delete the word to the left of the cursor.
+.IP "^DELETE [ ESC-X or ESC-DELETE ]"
+(That is, CONTROL and DELETE simultaneously.)
+Delete the word under the cursor.
+.IP "UPARROW [ ESC-k ]"
+Retrieve the previous command line.
+If you first enter some text and then press UPARROW,
+it will retrieve the previous command which begins with that text.
+.IP "DOWNARROW [ ESC-j ]"
+Retrieve the next command line.
+If you first enter some text and then press DOWNARROW,
+it will retrieve the next command which begins with that text.
+.IP "TAB"
+Complete the partial filename to the left of the cursor.
+If it matches more than one filename, the first match
+is entered into the command line.
+Repeated TABs will cycle thru the other matching filenames.
+If the completed filename is a directory, a "/" is appended to the filename.
+(On MS-DOS systems, a "\e" is appended.)
+The environment variable LESSSEPARATOR can be used to specify a
+different character to append to a directory name.
+.IP "BACKTAB [ ESC-TAB ]"
+Like, TAB, but cycles in the reverse direction thru the matching filenames.
+.IP "^L"
+Complete the partial filename to the left of the cursor.
+If it matches more than one filename, all matches are entered into
+the command line (if they fit).
+.IP "^U (Unix and OS/2) or ESC (MS-DOS)"
+Delete the entire command line,
+or cancel the command if the command line is empty.
+If you have changed your line-kill character in Unix to something
+other than ^U, that character is used instead of ^U.
+.IP "^G"
+Delete the entire command line and return to the main prompt.
+
+.SH "KEY BINDINGS"
+You may define your own
+.I less
+commands by using the program
+.I lesskey
+(1)
+to create a lesskey file.
+This file specifies a set of command keys and an action
+associated with each key.
+You may also use
+.I lesskey
+to change the line-editing keys (see LINE EDITING),
+and to set environment variables.
+If the environment variable LESSKEY is set,
+.I less
+uses that as the name of the lesskey file.
+Otherwise,
+.I less
+looks in a standard place for the lesskey file:
+On Unix systems,
+.I less
+looks for a lesskey file called "$HOME/.less".
+On MS-DOS and Windows systems,
+.I less
+looks for a lesskey file called "$HOME/_less", and if it is not found there,
+then looks for a lesskey file called "_less" in any directory specified
+in the PATH environment variable.
+On OS/2 systems,
+.I less
+looks for a lesskey file called "$HOME/less.ini", and if it is not found,
+then looks for a lesskey file called "less.ini" in any directory specified
+in the INIT environment variable, and if it not found there,
+then looks for a lesskey file called "less.ini" in any directory specified
+in the PATH environment variable.
+See the
+.I lesskey
+manual page for more details.
+.P
+A system-wide lesskey file may also be set up to provide key bindings.
+If a key is defined in both a local lesskey file and in the
+system-wide file, key bindings in the local file take precedence over
+those in the system-wide file.
+If the environment variable LESSKEY_SYSTEM is set,
+.I less
+uses that as the name of the system-wide lesskey file.
+Otherwise,
+.I less
+looks in a standard place for the system-wide lesskey file:
+On Unix systems, the system-wide lesskey file is /usr/local/etc/sysless.
+(However, if
+.I less
+was built with a different sysconf directory than /usr/local/etc,
+that directory is where the sysless file is found.)
+On MS-DOS and Windows systems, the system-wide lesskey file is c:\e_sysless.
+On OS/2 systems, the system-wide lesskey file is c:\esysless.ini.
+
+.SH "INPUT PREPROCESSOR"
+You may define an "input preprocessor" for
+.I less.
+Before
+.I less
+opens a file, it first gives your input preprocessor a chance to modify the
+way the contents of the file are displayed.
+An input preprocessor is simply an executable program (or shell script),
+which writes the contents of the file to a different file,
+called the replacement file.
+The contents of the replacement file are then displayed
+in place of the contents of the original file.
+However, it will appear to the user as if the original file is opened;
+that is,
+.I less
+will display the original filename as the name of the current file.
+.PP
+An input preprocessor receives one command line argument, the original filename,
+as entered by the user.
+It should create the replacement file, and when finished,
+print the name of the replacement file to its standard output.
+If the input preprocessor does not output a replacement filename,
+.I less
+uses the original file, as normal.
+The input preprocessor is not called when viewing standard input.
+To set up an input preprocessor, set the LESSOPEN environment variable
+to a command line which will invoke your input preprocessor.
+This command line should include one occurrence of the string "%s",
+which will be replaced by the filename
+when the input preprocessor command is invoked.
+.PP
+When
+.I less
+closes a file opened in such a way, it will call another program,
+called the input postprocessor,
+which may perform any desired clean-up action (such as deleting the
+replacement file created by LESSOPEN).
+This program receives two command line arguments, the original filename
+as entered by the user, and the name of the replacement file.
+To set up an input postprocessor, set the LESSCLOSE environment variable
+to a command line which will invoke your input postprocessor.
+It may include two occurrences of the string "%s";
+the first is replaced with the original name of the file and
+the second with the name of the replacement file,
+which was output by LESSOPEN.
+.PP
+For example, on many Unix systems, these two scripts will allow you
+to keep files in compressed format, but still let
+.I less
+view them directly:
+.PP
+lessopen.sh:
+.br
+ #! /bin/sh
+.br
+ case "$1" in
+.br
+ *.Z) uncompress \-c $1 >/tmp/less.$$ 2>/dev/null
+.br
+ if [ \-s /tmp/less.$$ ]; then
+.br
+ echo /tmp/less.$$
+.br
+ else
+.br
+ rm \-f /tmp/less.$$
+.br
+ fi
+.br
+ ;;
+.br
+ esac
+.PP
+lessclose.sh:
+.br
+ #! /bin/sh
+.br
+ rm $2
+.PP
+To use these scripts, put them both where they can be executed and
+set LESSOPEN="lessopen.sh\ %s", and
+LESSCLOSE="lessclose.sh\ %s\ %s".
+More complex LESSOPEN and LESSCLOSE scripts may be written
+to accept other types of compressed files, and so on.
+.PP
+It is also possible to set up an input preprocessor to
+pipe the file data directly to
+.I less,
+rather than putting the data into a replacement file.
+This avoids the need to decompress the entire file before
+starting to view it.
+An input preprocessor that works this way is called an input pipe.
+An input pipe, instead of writing the name of a replacement file on
+its standard output,
+writes the entire contents of the replacement file on its standard output.
+If the input pipe does not write any characters on its standard output,
+then there is no replacement file and
+.I less
+uses the original file, as normal.
+To use an input pipe,
+make the first character in the LESSOPEN environment variable a
+vertical bar (|) to signify that the input preprocessor is an input pipe.
+.PP
+For example, on many Unix systems, this script will work like the
+previous example scripts:
+.PP
+lesspipe.sh:
+.br
+ #! /bin/sh
+.br
+ case "$1" in
+.br
+ *.Z) uncompress \-c $1 2>/dev/null
+.br
+ *) exit 1
+.br
+ ;;
+.br
+ esac
+.br
+ exit $?
+.br
+.PP
+To use this script, put it where it can be executed and set
+LESSOPEN="|lesspipe.sh %s".
+.PP
+Note that a preprocessor cannot output an empty file, since that
+is interpreted as meaning there is no replacement, and
+the original file is used.
+To avoid this, if LESSOPEN starts with two vertical bars,
+the exit status of the script becomes meaningful.
+If the exit status is zero, the output is considered to be
+replacement text, even if it empty.
+If the exit status is nonzero, any output is ignored and the
+original file is used.
+For compatibility with previous versions of
+.I less,
+if LESSOPEN starts with only one vertical bar, the exit status
+of the preprocessor is ignored.
+.PP
+When an input pipe is used, a LESSCLOSE postprocessor can be used,
+but it is usually not necessary since there is no replacement file
+to clean up.
+In this case, the replacement file name passed to the LESSCLOSE
+postprocessor is "\-".
+.PP
+For compatibility with previous versions of
+.I less,
+the input preprocessor or pipe is not used if
+.I less
+is viewing standard input.
+However, if the first character of LESSOPEN is a dash (\-),
+the input preprocessor is used on standard input as well as other files.
+In this case, the dash is not considered to be part of
+the preprocessor command.
+If standard input is being viewed, the input preprocessor is passed
+a file name consisting of a single dash.
+Similarly, if the first two characters of LESSOPEN are vertical bar and dash
+(|\-) or two vertical bars and a dash (||\-),
+the input pipe is used on standard input as well as other files.
+Again, in this case the dash is not considered to be part of
+the input pipe command.
+
+.SH "NATIONAL CHARACTER SETS"
+There are three types of characters in the input file:
+.IP "normal characters"
+can be displayed directly to the screen.
+.IP "control characters"
+should not be displayed directly, but are expected to be found
+in ordinary text files (such as backspace and tab).
+.IP "binary characters"
+should not be displayed directly and are not expected to be found
+in text files.
+.PP
+A "character set" is simply a description of which characters are to
+be considered normal, control, and binary.
+The LESSCHARSET environment variable may be used to select a character set.
+Possible values for LESSCHARSET are:
+.IP ascii
+BS, TAB, NL, CR, and formfeed are control characters,
+all chars with values between 32 and 126 are normal,
+and all others are binary.
+.IP iso8859
+Selects an ISO 8859 character set.
+This is the same as ASCII, except characters between 160 and 255 are
+treated as normal characters.
+.IP latin1
+Same as iso8859.
+.IP latin9
+Same as iso8859.
+.IP dos
+Selects a character set appropriate for MS-DOS.
+.IP ebcdic
+Selects an EBCDIC character set.
+.IP IBM-1047
+Selects an EBCDIC character set used by OS/390 Unix Services.
+This is the EBCDIC analogue of latin1. You get similar results
+by setting either LESSCHARSET=IBM-1047 or LC_CTYPE=en_US
+in your environment.
+.IP koi8-r
+Selects a Russian character set.
+.IP next
+Selects a character set appropriate for NeXT computers.
+.IP utf-8
+Selects the UTF-8 encoding of the ISO 10646 character set.
+UTF-8 is special in that it supports multi-byte characters in the input file.
+It is the only character set that supports multi-byte characters.
+.IP windows
+Selects a character set appropriate for Microsoft Windows (cp 1251).
+.PP
+In rare cases, it may be desired to tailor
+.I less
+to use a character set other than the ones definable by LESSCHARSET.
+In this case, the environment variable LESSCHARDEF can be used
+to define a character set.
+It should be set to a string where each character in the string represents
+one character in the character set.
+The character "." is used for a normal character, "c" for control,
+and "b" for binary.
+A decimal number may be used for repetition.
+For example, "bccc4b.\&" would mean character 0 is binary,
+1, 2 and 3 are control, 4, 5, 6 and 7 are binary, and 8 is normal.
+All characters after the last are taken to be the same as the last,
+so characters 9 through 255 would be normal.
+(This is an example, and does not necessarily
+represent any real character set.)
+.PP
+This table shows the value of LESSCHARDEF which is equivalent
+to each of the possible values for LESSCHARSET:
+.sp
+ ascii\ 8bcccbcc18b95.b
+.br
+ dos\ \ \ 8bcccbcc12bc5b95.b.
+.br
+ ebcdic 5bc6bcc7bcc41b.9b7.9b5.b..8b6.10b6.b9.7b
+.br
+ \ \ \ \ \ \ 9.8b8.17b3.3b9.7b9.8b8.6b10.b.b.b.
+.br
+ IBM-1047 4cbcbc3b9cbccbccbb4c6bcc5b3cbbc4bc4bccbc
+.br
+ \ \ \ \ \ \ 191.b
+.br
+ iso8859 8bcccbcc18b95.33b.
+.br
+ koi8-r 8bcccbcc18b95.b128.
+.br
+ latin1 8bcccbcc18b95.33b.
+.br
+ next\ \ 8bcccbcc18b95.bb125.bb
+.PP
+If neither LESSCHARSET nor LESSCHARDEF is set,
+but any of the strings "UTF-8", "UTF8", "utf-8" or "utf8"
+is found in the LC_ALL, LC_CTYPE or LANG
+environment variables, then the default character set is utf-8.
+.PP
+If that string is not found, but your system supports the
+.I setlocale
+interface,
+.I less
+will use setlocale to determine the character set.
+setlocale is controlled by setting the LANG or LC_CTYPE environment
+variables.
+.PP
+Finally, if the
+.I setlocale
+interface is also not available, the default character set is latin1.
+.PP
+Control and binary characters are displayed in standout (reverse video).
+Each such character is displayed in caret notation if possible
+(e.g.\& ^A for control-A). Caret notation is used only if
+inverting the 0100 bit results in a normal printable character.
+Otherwise, the character is displayed as a hex number in angle brackets.
+This format can be changed by
+setting the LESSBINFMT environment variable.
+LESSBINFMT may begin with a "*" and one character to select
+the display attribute:
+"*k" is blinking, "*d" is bold, "*u" is underlined, "*s" is standout,
+and "*n" is normal.
+If LESSBINFMT does not begin with a "*", normal attribute is assumed.
+The remainder of LESSBINFMT is a string which may include one
+printf-style escape sequence (a % followed by x, X, o, d, etc.).
+For example, if LESSBINFMT is "*u[%x]", binary characters
+are displayed in underlined hexadecimal surrounded by brackets.
+The default if no LESSBINFMT is specified is "*s<%02X>".
+Warning: the result of expanding the character via LESSBINFMT must
+be less than 31 characters.
+.PP
+When the character set is utf-8, the LESSUTFBINFMT environment variable
+acts similarly to LESSBINFMT but it applies to Unicode code points
+that were successfully decoded but are unsuitable for display (e.g.,
+unassigned code points).
+Its default value is "<U+%04lX>".
+Note that LESSUTFBINFMT and LESSBINFMT share their display attribute
+setting ("*x") so specifying one will affect both;
+LESSUTFBINFMT is read after LESSBINFMT so its setting, if any,
+will have priority.
+Problematic octets in a UTF-8 file (octets of a truncated sequence,
+octets of a complete but non-shortest form sequence, illegal octets,
+and stray trailing octets)
+are displayed individually using LESSBINFMT so as to facilitate diagnostic
+of how the UTF-8 file is ill-formed.
+
+.SH "PROMPTS"
+The \-P option allows you to tailor the prompt to your preference.
+The string given to the \-P option replaces the specified prompt string.
+Certain characters in the string are interpreted specially.
+The prompt mechanism is rather complicated to provide flexibility,
+but the ordinary user need not understand the details of constructing
+personalized prompt strings.
+.sp
+A percent sign followed by a single character is expanded
+according to what the following character is:
+.IP "%b\fIX\fP"
+Replaced by the byte offset into the current input file.
+The b is followed by a single character (shown as \fIX\fP above)
+which specifies the line whose byte offset is to be used.
+If the character is a "t", the byte offset of the top line in the
+display is used,
+an "m" means use the middle line,
+a "b" means use the bottom line,
+a "B" means use the line just after the bottom line,
+and a "j" means use the "target" line, as specified by the \-j option.
+.IP "%B"
+Replaced by the size of the current input file.
+.IP "%c"
+Replaced by the column number of the text appearing in the first
+column of the screen.
+.IP "%d\fIX\fP"
+Replaced by the page number of a line in the input file.
+The line to be used is determined by the \fIX\fP, as with the %b option.
+.IP "%D"
+Replaced by the number of pages in the input file,
+or equivalently, the page number of the last line in the input file.
+.IP "%E"
+Replaced by the name of the editor (from the VISUAL environment variable,
+or the EDITOR environment variable if VISUAL is not defined).
+See the discussion of the LESSEDIT feature below.
+.IP "%f"
+Replaced by the name of the current input file.
+.IP "%F"
+Replaced by the last component of the name of the current input file.
+.IP "%i"
+Replaced by the index of the current file in the list of
+input files.
+.IP "%l\fIX\fP"
+Replaced by the line number of a line in the input file.
+The line to be used is determined by the \fIX\fP, as with the %b option.
+.IP "%L"
+Replaced by the line number of the last line in the input file.
+.IP "%m"
+Replaced by the total number of input files.
+.IP "%p\fIX\fP"
+Replaced by the percent into the current input file, based on byte offsets.
+The line used is determined by the \fIX\fP as with the %b option.
+.IP "%P\fIX\fP"
+Replaced by the percent into the current input file, based on line numbers.
+The line used is determined by the \fIX\fP as with the %b option.
+.IP "%s"
+Same as %B.
+.IP "%t"
+Causes any trailing spaces to be removed.
+Usually used at the end of the string, but may appear anywhere.
+.IP "%T"
+Normally expands to the word "file".
+However if viewing files via a tags list using the \-t option, it expands to the word "tag".
+.IP "%x"
+Replaced by the name of the next input file in the list.
+.PP
+If any item is unknown (for example, the file size if input
+is a pipe), a question mark is printed instead.
+.PP
+The format of the prompt string can be changed
+depending on certain conditions.
+A question mark followed by a single character acts like an "IF":
+depending on the following character, a condition is evaluated.
+If the condition is true, any characters following the question mark
+and condition character, up to a period, are included in the prompt.
+If the condition is false, such characters are not included.
+A colon appearing between the question mark and the
+period can be used to establish an "ELSE": any characters between
+the colon and the period are included in the string if and only if
+the IF condition is false.
+Condition characters (which follow a question mark) may be:
+.IP "?a"
+True if any characters have been included in the prompt so far.
+.IP "?b\fIX\fP"
+True if the byte offset of the specified line is known.
+.IP "?B"
+True if the size of current input file is known.
+.IP "?c"
+True if the text is horizontally shifted (%c is not zero).
+.IP "?d\fIX\fP"
+True if the page number of the specified line is known.
+.IP "?e"
+True if at end-of-file.
+.IP "?f"
+True if there is an input filename
+(that is, if input is not a pipe).
+.IP "?l\fIX\fP"
+True if the line number of the specified line is known.
+.IP "?L"
+True if the line number of the last line in the file is known.
+.IP "?m"
+True if there is more than one input file.
+.IP "?n"
+True if this is the first prompt in a new input file.
+.IP "?p\fIX\fP"
+True if the percent into the current input file, based on byte offsets,
+of the specified line is known.
+.IP "?P\fIX\fP"
+True if the percent into the current input file, based on line numbers,
+of the specified line is known.
+.IP "?s"
+Same as "?B".
+.IP "?x"
+True if there is a next input file
+(that is, if the current input file is not the last one).
+.PP
+Any characters other than the special ones
+(question mark, colon, period, percent, and backslash)
+become literally part of the prompt.
+Any of the special characters may be included in the prompt literally
+by preceding it with a backslash.
+.PP
+Some examples:
+.sp
+?f%f:Standard input.
+.sp
+This prompt prints the filename, if known;
+otherwise the string "Standard input".
+.sp
+?f%f \&.?ltLine %lt:?pt%pt\e%:?btByte %bt:-...
+.sp
+This prompt would print the filename, if known.
+The filename is followed by the line number, if known,
+otherwise the percent if known, otherwise the byte offset if known.
+Otherwise, a dash is printed.
+Notice how each question mark has a matching period,
+and how the % after the %pt
+is included literally by escaping it with a backslash.
+.sp
+?n?f%f\ .?m(%T %i of %m)\ ..?e(END)\ ?x-\ Next\e:\ %x..%t";
+.sp
+This prints the filename if this is the first prompt in a file,
+followed by the "file N of N" message if there is more
+than one input file.
+Then, if we are at end-of-file, the string "(END)" is printed
+followed by the name of the next file, if there is one.
+Finally, any trailing spaces are truncated.
+This is the default prompt.
+For reference, here are the defaults for
+the other two prompts (\-m and \-M respectively).
+Each is broken into two lines here for readability only.
+.nf
+.sp
+?n?f%f\ .?m(%T\ %i\ of\ %m)\ ..?e(END)\ ?x-\ Next\e:\ %x.:
+ ?pB%pB\e%:byte\ %bB?s/%s...%t
+.sp
+?f%f\ .?n?m(%T\ %i\ of\ %m)\ ..?ltlines\ %lt-%lb?L/%L.\ :
+ byte\ %bB?s/%s.\ .?e(END)\ ?x-\ Next\e:\ %x.:?pB%pB\e%..%t
+.sp
+.fi
+And here is the default message produced by the = command:
+.nf
+.sp
+?f%f\ .?m(%T\ %i\ of\ %m)\ .?ltlines\ %lt-%lb?L/%L.\ .
+ byte\ %bB?s/%s.\ ?e(END)\ :?pB%pB\e%..%t
+.fi
+.PP
+The prompt expansion features are also used for another purpose:
+if an environment variable LESSEDIT is defined, it is used
+as the command to be executed when the v command is invoked.
+The LESSEDIT string is expanded in the same way as the prompt strings.
+The default value for LESSEDIT is:
+.nf
+.sp
+ %E\ ?lm+%lm.\ %f
+.sp
+.fi
+Note that this expands to the editor name, followed by a + and the
+line number, followed by the file name.
+If your editor does not accept the "+linenumber" syntax, or has other
+differences in invocation syntax, the LESSEDIT variable can be
+changed to modify this default.
+
+.SH SECURITY
+When the environment variable LESSSECURE is set to 1,
+.I less
+runs in a "secure" mode.
+This means these features are disabled:
+.RS
+.IP "!"
+the shell command
+.IP "|"
+the pipe command
+.IP ":e"
+the examine command.
+.IP "v"
+the editing command
+.IP "s \-o"
+log files
+.IP "\-k"
+use of lesskey files
+.IP "\-t"
+use of tags files
+.IP " "
+metacharacters in filenames, such as *
+.IP " "
+filename completion (TAB, ^L)
+.RE
+.PP
+Less can also be compiled to be permanently in "secure" mode.
+
+.SH "COMPATIBILITY WITH MORE"
+If the environment variable LESS_IS_MORE is set to 1,
+or if the program is invoked via a file link named "more",
+.I less
+behaves (mostly) in conformance with the POSIX "more" command specification.
+In this mode, less behaves differently in these ways:
+.PP
+The \-e option works differently.
+If the \-e option is not set,
+.I less
+behaves as if the \-e option were set.
+If the \-e option is set,
+.I less
+behaves as if the \-E option were set.
+.PP
+The \-m option works differently.
+If the \-m option is not set, the medium prompt is used,
+and it is prefixed with the string "--More--".
+If the \-m option is set, the short prompt is used.
+.PP
+The \-n option acts like the \-z option.
+The normal behavior of the \-n option is unavailable in this mode.
+.PP
+The parameter to the \-p option is taken to be a
+.I less
+command rather than a search pattern.
+.PP
+The LESS environment variable is ignored,
+and the MORE environment variable is used in its place.
+
+.SH "ENVIRONMENT VARIABLES"
+Environment variables may be specified either in the system environment
+as usual, or in a
+.I lesskey
+(1) file.
+If environment variables are defined in more than one place,
+variables defined in a local lesskey file take precedence over
+variables defined in the system environment, which take precedence
+over variables defined in the system-wide lesskey file.
+.IP COLUMNS
+Sets the number of columns on the screen.
+Takes precedence over the number of columns specified by the TERM variable.
+(But if you have a windowing system which supports TIOCGWINSZ or WIOCGETD,
+the window system's idea of the screen size takes precedence over the
+LINES and COLUMNS environment variables.)
+.IP EDITOR
+The name of the editor (used for the v command).
+.IP HOME
+Name of the user's home directory
+(used to find a lesskey file on Unix and OS/2 systems).
+.IP "HOMEDRIVE, HOMEPATH"
+Concatenation of the HOMEDRIVE and HOMEPATH environment variables is
+the name of the user's home directory if the HOME variable is not set
+(only in the Windows version).
+.IP INIT
+Name of the user's init directory (used to find a lesskey file on OS/2 systems).
+.IP LANG
+Language for determining the character set.
+.IP LC_CTYPE
+Language for determining the character set.
+.IP LESS
+Options which are passed to
+.I less
+automatically.
+.IP LESSANSIENDCHARS
+Characters which may end an ANSI color escape sequence
+(default "m").
+.IP LESSANSIMIDCHARS
+Characters which may appear between the ESC character and the
+end character in an ANSI color escape sequence
+(default "0123456789:;[?!"'#%()*+\ ".
+.IP LESSBINFMT
+Format for displaying non-printable, non-control characters.
+.IP LESSCHARDEF
+Defines a character set.
+.IP LESSCHARSET
+Selects a predefined character set.
+.IP LESSCLOSE
+Command line to invoke the (optional) input-postprocessor.
+.IP LESSECHO
+Name of the lessecho program (default "lessecho").
+The lessecho program is needed to expand metacharacters, such as * and ?,
+in filenames on Unix systems.
+.IP LESSEDIT
+Editor prototype string (used for the v command).
+See discussion under PROMPTS.
+.IP LESSGLOBALTAGS
+Name of the command used by the \-t option to find global tags.
+Normally should be set to "global" if your system has the
+.I global
+(1) command. If not set, global tags are not used.
+.IP LESSHISTFILE
+Name of the history file used to remember search commands and
+shell commands between invocations of
+.I less.
+If set to "\-" or "/dev/null", a history file is not used.
+The default is "$HOME/.lesshst" on Unix systems, "$HOME/_lesshst" on
+DOS and Windows systems, or "$HOME/lesshst.ini" or "$INIT/lesshst.ini"
+on OS/2 systems.
+.IP LESSHISTSIZE
+The maximum number of commands to save in the history file.
+The default is 100.
+.IP LESSKEY
+Name of the default lesskey(1) file.
+.IP LESSKEY_SYSTEM
+Name of the default system-wide lesskey(1) file.
+.IP LESSMETACHARS
+List of characters which are considered "metacharacters" by the shell.
+.IP LESSMETAESCAPE
+Prefix which less will add before each metacharacter in a
+command sent to the shell.
+If LESSMETAESCAPE is an empty string, commands containing
+metacharacters will not be passed to the shell.
+.IP LESSOPEN
+Command line to invoke the (optional) input-preprocessor.
+.IP LESSSECURE
+Runs less in "secure" mode.
+See discussion under SECURITY.
+.IP LESSSEPARATOR
+String to be appended to a directory name in filename completion.
+.IP LESSUTFBINFMT
+Format for displaying non-printable Unicode code points.
+.IP LESS_IS_MORE
+Emulate the
+.I more
+(1) command.
+.IP LINES
+Sets the number of lines on the screen.
+Takes precedence over the number of lines specified by the TERM variable.
+(But if you have a windowing system which supports TIOCGWINSZ or WIOCGETD,
+the window system's idea of the screen size takes precedence over the
+LINES and COLUMNS environment variables.)
+.IP MORE
+Options which are passed to
+.I less
+automatically when running in
+.I more
+compatible mode.
+.IP PATH
+User's search path (used to find a lesskey file
+on MS-DOS and OS/2 systems).
+.IP SHELL
+The shell used to execute the ! command, as well as to expand filenames.
+.IP TERM
+The type of terminal on which
+.I less
+is being run.
+.IP VISUAL
+The name of the editor (used for the v command).
+
+.SH "SEE ALSO"
+lesskey(1)
+
+.SH COPYRIGHT
+Copyright (C) 1984-2015 Mark Nudelman
+.PP
+less is part of the GNU project and is free software.
+You can redistribute it and/or modify it
+under the terms of either
+(1) the GNU General Public License as published by
+the Free Software Foundation; or (2) the Less License.
+See the file README in the less distribution for more details
+regarding redistribution.
+You should have received a copy of the GNU General Public License
+along with the source for less; see the file COPYING.
+If not, write to the Free Software Foundation, 59 Temple Place,
+Suite 330, Boston, MA 02111-1307, USA.
+You should also have received a copy of the Less License;
+see the file LICENSE.
+.PP
+less is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.
+See the GNU General Public License for more details.
+
+.SH AUTHOR
+.PP
+Mark Nudelman
+.br
+Send bug reports or comments to <bug-less@gnu.org>
+.br
+See http://www.greenwoodsoftware.com/less/bugs.html for the latest list of known bugs in less.
+.br
+For more information, see the less homepage at
+.br
+http://www.greenwoodsoftware.com/less.
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * lessecho [-ox] [-cx] [-pn] [-dn] [-a] file ...
+ * Simply echos its filename arguments on standard output.
+ * But any argument containing spaces is enclosed in quotes.
+ *
+ * -ox Specifies "x" to be the open quote character.
+ * -cx Specifies "x" to be the close quote character.
+ * -pn Specifies "n" to be the open quote character, as an integer.
+ * -dn Specifies "n" to be the close quote character, as an integer.
+ * -mx Specifies "x" to be a metachar.
+ * -nn Specifies "n" to be a metachar, as an integer.
+ * -ex Specifies "x" to be the escape char for metachars.
+ * -fn Specifies "x" to be the escape char for metachars, as an integer.
+ * -a Specifies that all arguments are to be quoted.
+ * The default is that only arguments containing spaces are quoted.
+ */
+
+#include "less.h"
+
+static char *version = "$Revision: 1.15 $";
+
+static int quote_all = 0;
+static char openquote = '"';
+static char closequote = '"';
+static char *meta_escape = "\\";
+static char meta_escape_buf[2];
+static char metachars[64] = "";
+static int num_metachars = 0;
+
+ static void
+pr_usage()
+{
+ fprintf(stderr,
+ "usage: lessecho [-ox] [-cx] [-pn] [-dn] [-mx] [-nn] [-ex] [-fn] [-a] file ...\n");
+}
+
+ static void
+pr_version()
+{
+ char *p;
+ char buf[10];
+ char *pbuf = buf;
+
+ for (p = version; *p != ' '; p++)
+ if (*p == '\0')
+ return;
+ for (p++; *p != '$' && *p != ' ' && *p != '\0'; p++)
+ *pbuf++ = *p;
+ *pbuf = '\0';
+ printf("%s\n", buf);
+}
+
+ static void
+pr_error(s)
+ char *s;
+{
+ fprintf(stderr, "%s\n", s);
+ exit(1);
+}
+
+ static long
+lstrtol(s, radix, pend)
+ char *s;
+ int radix;
+ char **pend;
+{
+ int v;
+ int neg = 0;
+ long n = 0;
+
+ /* Skip leading white space. */
+ while (*s == ' ' || *s == '\t')
+ s++;
+
+ /* Check for a leading + or -. */
+ if (*s == '-')
+ {
+ neg = 1;
+ s++;
+ } else if (*s == '+')
+ {
+ s++;
+ }
+
+ /* Determine radix if caller does not specify. */
+ if (radix == 0)
+ {
+ radix = 10;
+ if (*s == '0')
+ {
+ switch (*++s)
+ {
+ case 'x':
+ radix = 16;
+ s++;
+ break;
+ default:
+ radix = 8;
+ break;
+ }
+ }
+ }
+
+ /* Parse the digits of the number. */
+ for (;;)
+ {
+ if (*s >= '0' && *s <= '9')
+ v = *s - '0';
+ else if (*s >= 'a' && *s <= 'f')
+ v = *s - 'a' + 10;
+ else if (*s >= 'A' && *s <= 'F')
+ v = *s - 'A' + 10;
+ else
+ break;
+ if (v >= radix)
+ break;
+ n = n * radix + v;
+ s++;
+ }
+
+ if (pend != NULL)
+ {
+ /* Skip trailing white space. */
+ while (*s == ' ' || *s == '\t')
+ s++;
+ *pend = s;
+ }
+ if (neg)
+ return (-n);
+ return (n);
+}
+
+
+#if !HAVE_STRCHR
+ char *
+strchr(s, c)
+ char *s;
+ int c;
+{
+ for ( ; *s != '\0'; s++)
+ if (*s == c)
+ return (s);
+ if (c == '\0')
+ return (s);
+ return (NULL);
+}
+#endif
+
+ int
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ char *arg;
+ char *s;
+ int no_more_options;
+
+ no_more_options = 0;
+ while (--argc > 0)
+ {
+ arg = *++argv;
+ if (*arg != '-' || no_more_options)
+ break;
+ switch (*++arg)
+ {
+ case 'a':
+ quote_all = 1;
+ break;
+ case 'c':
+ closequote = *++arg;
+ break;
+ case 'd':
+ closequote = lstrtol(++arg, 0, &s);
+ if (s == arg)
+ pr_error("Missing number after -d");
+ break;
+ case 'e':
+ if (strcmp(++arg, "-") == 0)
+ meta_escape = "";
+ else
+ meta_escape = arg;
+ break;
+ case 'f':
+ meta_escape_buf[0] = lstrtol(++arg, 0, &s);
+ meta_escape = meta_escape_buf;
+ if (s == arg)
+ pr_error("Missing number after -f");
+ break;
+ case 'o':
+ openquote = *++arg;
+ break;
+ case 'p':
+ openquote = lstrtol(++arg, 0, &s);
+ if (s == arg)
+ pr_error("Missing number after -p");
+ break;
+ case 'm':
+ metachars[num_metachars++] = *++arg;
+ metachars[num_metachars] = '\0';
+ break;
+ case 'n':
+ metachars[num_metachars++] = lstrtol(++arg, 0, &s);
+ if (s == arg)
+ pr_error("Missing number after -n");
+ metachars[num_metachars] = '\0';
+ break;
+ case '?':
+ pr_usage();
+ return (0);
+ case '-':
+ if (*++arg == '\0')
+ {
+ no_more_options = 1;
+ break;
+ }
+ if (strcmp(arg, "version") == 0)
+ {
+ pr_version();
+ return (0);
+ }
+ if (strcmp(arg, "help") == 0)
+ {
+ pr_usage();
+ return (0);
+ }
+ pr_error("Invalid option after --");
+ default:
+ pr_error("Invalid option letter");
+ }
+ }
+
+ while (argc-- > 0)
+ {
+ int has_meta = 0;
+ arg = *argv++;
+ for (s = arg; *s != '\0'; s++)
+ {
+ if (strchr(metachars, *s) != NULL)
+ {
+ has_meta = 1;
+ break;
+ }
+ }
+ if (quote_all || (has_meta && strlen(meta_escape) == 0))
+ printf("%c%s%c", openquote, arg, closequote);
+ else
+ {
+ for (s = arg; *s != '\0'; s++)
+ {
+ if (strchr(metachars, *s) != NULL)
+ printf("%s", meta_escape);
+ printf("%c", *s);
+ }
+ }
+ if (argc > 0)
+ printf(" ");
+ else
+ printf("\n");
+ }
+ return (0);
+}
--- /dev/null
+LESSECHO(1) General Commands Manual LESSECHO(1)
+
+
+
+\e[1mNAME\e[0m
+ lessecho - expand metacharacters
+
+\e[1mSYNOPSIS\e[0m
+ \e[1mlessecho \e[4m\e[22m[-ox]\e[24m \e[4m[-cx]\e[24m \e[4m[-pn]\e[24m \e[4m[-dn]\e[24m \e[4m[-mx]\e[24m \e[4m[-nn]\e[24m \e[4m[-ex]\e[24m \e[4m[-a]\e[24m \e[4mfile\e[24m \e[4m...\e[0m
+
+\e[1mDESCRIPTION\e[0m
+ \e[4mlessecho\e[24m is a program that simply echos its arguments on standard out-
+ put. But any metacharacter in the output is preceded by an "escape"
+ character, which by default is a backslash.
+
+\e[1mOPTIONS\e[0m
+ A summary of options is included below.
+
+ \e[1m-ex \e[22mSpecifies "x", rather than backslash, to be the escape char for
+ metachars. If x is "-", no escape char is used and arguments
+ containing metachars are surrounded by quotes instead.
+
+ \e[1m-ox \e[22mSpecifies "x", rather than double-quote, to be the open quote
+ character, which is used if the -e- option is specified.
+
+ \e[1m-cx \e[22mSpecifies "x" to be the close quote character.
+
+ \e[1m-pn \e[22mSpecifies "n" to be the open quote character, as an integer.
+
+ \e[1m-dn \e[22mSpecifies "n" to be the close quote character, as an integer.
+
+ \e[1m-mx \e[22mSpecifies "x" to be a metachar. By default, no characters are
+ considered metachars.
+
+ \e[1m-nn \e[22mSpecifies "n" to be a metachar, as an integer.
+
+ \e[1m-fn \e[22mSpecifies "n" to be the escape char for metachars, as an inte-
+ ger.
+
+ \e[1m-a \e[22mSpecifies that all arguments are to be quoted. The default is
+ that only arguments containing metacharacters are quoted
+
+\e[1mSEE ALSO\e[0m
+ less(1)
+
+\e[1mAUTHOR\e[0m
+ This manual page was written by Thomas Schoepf <schoepf@debian.org>,
+ for the Debian GNU/Linux system (but may be used by others).
+
+ Send bug reports or comments to bug-less@gnu.org.
+
+
+
+ Version 481: 31 Aug 2015 LESSECHO(1)
--- /dev/null
+.TH LESSECHO 1 "Version 481: 31 Aug 2015"
+.SH NAME
+lessecho \- expand metacharacters
+.SH SYNOPSIS
+.B lessecho
+.I "[-ox] [-cx] [-pn] [-dn] [-mx] [-nn] [-ex] [-a] file ..."
+.SH "DESCRIPTION"
+.I lessecho
+is a program that simply echos its arguments on standard output.
+But any metacharacter in the output is preceded by an "escape"
+character, which by default is a backslash.
+.SH OPTIONS
+A summary of options is included below.
+.TP
+.B \-ex
+Specifies "x", rather than backslash, to be the escape char for metachars.
+If x is "-", no escape char is used and arguments containing metachars
+are surrounded by quotes instead.
+.TP
+.B \-ox
+Specifies "x", rather than double-quote, to be the open quote character,
+which is used if the -e- option is specified.
+.TP
+.B \-cx
+Specifies "x" to be the close quote character.
+.TP
+.B \-pn
+Specifies "n" to be the open quote character, as an integer.
+.TP
+.B \-dn
+Specifies "n" to be the close quote character, as an integer.
+.TP
+.B \-mx
+Specifies "x" to be a metachar.
+By default, no characters are considered metachars.
+.TP
+.B \-nn
+Specifies "n" to be a metachar, as an integer.
+.TP
+.B \-fn
+Specifies "n" to be the escape char for metachars, as an integer.
+.TP
+.B \-a
+Specifies that all arguments are to be quoted.
+The default is that only arguments containing metacharacters are quoted
+.SH "SEE ALSO"
+less(1)
+.SH AUTHOR
+This manual page was written by Thomas Schoepf <schoepf@debian.org>,
+for the Debian GNU/Linux system (but may be used by others).
+.PP
+Send bug reports or comments to bug-less@gnu.org.
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * lesskey [-o output] [input]
+ *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *
+ * Make a .less file.
+ * If no input file is specified, standard input is used.
+ * If no output file is specified, $HOME/.less is used.
+ *
+ * The .less file is used to specify (to "less") user-defined
+ * key bindings. Basically any sequence of 1 to MAX_CMDLEN
+ * keystrokes may be bound to an existing less function.
+ *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *
+ * The input file is an ascii file consisting of a
+ * sequence of lines of the form:
+ * string <whitespace> action [chars] <newline>
+ *
+ * "string" is a sequence of command characters which form
+ * the new user-defined command. The command
+ * characters may be:
+ * 1. The actual character itself.
+ * 2. A character preceded by ^ to specify a
+ * control character (e.g. ^X means control-X).
+ * 3. A backslash followed by one to three octal digits
+ * to specify a character by its octal value.
+ * 4. A backslash followed by b, e, n, r or t
+ * to specify \b, ESC, \n, \r or \t, respectively.
+ * 5. Any character (other than those mentioned above) preceded
+ * by a \ to specify the character itself (characters which
+ * must be preceded by \ include ^, \, and whitespace.
+ * "action" is the name of a "less" action, from the table below.
+ * "chars" is an optional sequence of characters which is treated
+ * as keyboard input after the command is executed.
+ *
+ * Blank lines and lines which start with # are ignored,
+ * except for the special control lines:
+ * #command Signals the beginning of the command
+ * keys section.
+ * #line-edit Signals the beginning of the line-editing
+ * keys section.
+ * #env Signals the beginning of the environment
+ * variable section.
+ * #stop Stops command parsing in less;
+ * causes all default keys to be disabled.
+ *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *
+ * The output file is a non-ascii file, consisting of a header,
+ * one or more sections, and a trailer.
+ * Each section begins with a section header, a section length word
+ * and the section data. Normally there are three sections:
+ * CMD_SECTION Definition of command keys.
+ * EDIT_SECTION Definition of editing keys.
+ * END_SECTION A special section header, with no
+ * length word or section data.
+ *
+ * Section data consists of zero or more byte sequences of the form:
+ * string <0> <action>
+ * or
+ * string <0> <action|A_EXTRA> chars <0>
+ *
+ * "string" is the command string.
+ * "<0>" is one null byte.
+ * "<action>" is one byte containing the action code (the A_xxx value).
+ * If action is ORed with A_EXTRA, the action byte is followed
+ * by the null-terminated "chars" string.
+ *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ */
+
+#include "less.h"
+#include "lesskey.h"
+#include "cmd.h"
+
+struct cmdname
+{
+ char *cn_name;
+ int cn_action;
+};
+
+struct cmdname cmdnames[] =
+{
+ { "back-bracket", A_B_BRACKET },
+ { "back-line", A_B_LINE },
+ { "back-line-force", A_BF_LINE },
+ { "back-screen", A_B_SCREEN },
+ { "back-scroll", A_B_SCROLL },
+ { "back-search", A_B_SEARCH },
+ { "back-window", A_B_WINDOW },
+ { "debug", A_DEBUG },
+ { "digit", A_DIGIT },
+ { "display-flag", A_DISP_OPTION },
+ { "display-option", A_DISP_OPTION },
+ { "end", A_GOEND },
+ { "examine", A_EXAMINE },
+ { "filter", A_FILTER },
+ { "first-cmd", A_FIRSTCMD },
+ { "firstcmd", A_FIRSTCMD },
+ { "flush-repaint", A_FREPAINT },
+ { "forw-bracket", A_F_BRACKET },
+ { "forw-forever", A_F_FOREVER },
+ { "forw-until-hilite", A_F_UNTIL_HILITE },
+ { "forw-line", A_F_LINE },
+ { "forw-line-force", A_FF_LINE },
+ { "forw-screen", A_F_SCREEN },
+ { "forw-screen-force", A_FF_SCREEN },
+ { "forw-scroll", A_F_SCROLL },
+ { "forw-search", A_F_SEARCH },
+ { "forw-window", A_F_WINDOW },
+ { "goto-end", A_GOEND },
+ { "goto-end-buffered", A_GOEND_BUF },
+ { "goto-line", A_GOLINE },
+ { "goto-mark", A_GOMARK },
+ { "help", A_HELP },
+ { "index-file", A_INDEX_FILE },
+ { "invalid", A_UINVALID },
+ { "left-scroll", A_LSHIFT },
+ { "next-file", A_NEXT_FILE },
+ { "next-tag", A_NEXT_TAG },
+ { "noaction", A_NOACTION },
+ { "percent", A_PERCENT },
+ { "pipe", A_PIPE },
+ { "prev-file", A_PREV_FILE },
+ { "prev-tag", A_PREV_TAG },
+ { "quit", A_QUIT },
+ { "remove-file", A_REMOVE_FILE },
+ { "repaint", A_REPAINT },
+ { "repaint-flush", A_FREPAINT },
+ { "repeat-search", A_AGAIN_SEARCH },
+ { "repeat-search-all", A_T_AGAIN_SEARCH },
+ { "reverse-search", A_REVERSE_SEARCH },
+ { "reverse-search-all", A_T_REVERSE_SEARCH },
+ { "right-scroll", A_RSHIFT },
+ { "set-mark", A_SETMARK },
+ { "shell", A_SHELL },
+ { "status", A_STAT },
+ { "toggle-flag", A_OPT_TOGGLE },
+ { "toggle-option", A_OPT_TOGGLE },
+ { "undo-hilite", A_UNDO_SEARCH },
+ { "version", A_VERSION },
+ { "visual", A_VISUAL },
+ { NULL, 0 }
+};
+
+struct cmdname editnames[] =
+{
+ { "back-complete", EC_B_COMPLETE },
+ { "backspace", EC_BACKSPACE },
+ { "delete", EC_DELETE },
+ { "down", EC_DOWN },
+ { "end", EC_END },
+ { "expand", EC_EXPAND },
+ { "forw-complete", EC_F_COMPLETE },
+ { "home", EC_HOME },
+ { "insert", EC_INSERT },
+ { "invalid", EC_UINVALID },
+ { "kill-line", EC_LINEKILL },
+ { "abort", EC_ABORT },
+ { "left", EC_LEFT },
+ { "literal", EC_LITERAL },
+ { "right", EC_RIGHT },
+ { "up", EC_UP },
+ { "word-backspace", EC_W_BACKSPACE },
+ { "word-delete", EC_W_DELETE },
+ { "word-left", EC_W_LEFT },
+ { "word-right", EC_W_RIGHT },
+ { NULL, 0 }
+};
+
+struct table
+{
+ struct cmdname *names;
+ char *pbuffer;
+ char buffer[MAX_USERCMD];
+};
+
+struct table cmdtable;
+struct table edittable;
+struct table vartable;
+struct table *currtable = &cmdtable;
+
+char fileheader[] = {
+ C0_LESSKEY_MAGIC,
+ C1_LESSKEY_MAGIC,
+ C2_LESSKEY_MAGIC,
+ C3_LESSKEY_MAGIC
+};
+char filetrailer[] = {
+ C0_END_LESSKEY_MAGIC,
+ C1_END_LESSKEY_MAGIC,
+ C2_END_LESSKEY_MAGIC
+};
+char cmdsection[1] = { CMD_SECTION };
+char editsection[1] = { EDIT_SECTION };
+char varsection[1] = { VAR_SECTION };
+char endsection[1] = { END_SECTION };
+
+char *infile = NULL;
+char *outfile = NULL ;
+
+int linenum;
+int errors;
+
+extern char version[];
+
+ void
+usage()
+{
+ fprintf(stderr, "usage: lesskey [-o output] [input]\n");
+ exit(1);
+}
+
+ char *
+mkpathname(dirname, filename)
+ char *dirname;
+ char *filename;
+{
+ char *pathname;
+
+ pathname = calloc(strlen(dirname) + strlen(filename) + 2, sizeof(char));
+ strcpy(pathname, dirname);
+ strcat(pathname, PATHNAME_SEP);
+ strcat(pathname, filename);
+ return (pathname);
+}
+
+/*
+ * Figure out the name of a default file (in the user's HOME directory).
+ */
+ char *
+homefile(filename)
+ char *filename;
+{
+ char *p;
+ char *pathname;
+
+ if ((p = getenv("HOME")) != NULL && *p != '\0')
+ pathname = mkpathname(p, filename);
+#if OS2
+ else if ((p = getenv("INIT")) != NULL && *p != '\0')
+ pathname = mkpathname(p, filename);
+#endif
+ else
+ {
+ fprintf(stderr, "cannot find $HOME - using current directory\n");
+ pathname = mkpathname(".", filename);
+ }
+ return (pathname);
+}
+
+/*
+ * Parse command line arguments.
+ */
+ void
+parse_args(argc, argv)
+ int argc;
+ char **argv;
+{
+ char *arg;
+
+ outfile = NULL;
+ while (--argc > 0)
+ {
+ arg = *++argv;
+ if (arg[0] != '-')
+ /* Arg does not start with "-"; it's not an option. */
+ break;
+ if (arg[1] == '\0')
+ /* "-" means standard input. */
+ break;
+ if (arg[1] == '-' && arg[2] == '\0')
+ {
+ /* "--" means end of options. */
+ argc--;
+ argv++;
+ break;
+ }
+ switch (arg[1])
+ {
+ case '-':
+ if (strncmp(arg, "--output", 8) == 0)
+ {
+ if (arg[8] == '\0')
+ outfile = &arg[8];
+ else if (arg[8] == '=')
+ outfile = &arg[9];
+ else
+ usage();
+ goto opt_o;
+ }
+ if (strcmp(arg, "--version") == 0)
+ {
+ goto opt_V;
+ }
+ usage();
+ break;
+ case 'o':
+ outfile = &argv[0][2];
+ opt_o:
+ if (*outfile == '\0')
+ {
+ if (--argc <= 0)
+ usage();
+ outfile = *(++argv);
+ }
+ break;
+ case 'V':
+ opt_V:
+ printf("lesskey version %s\n", version);
+ exit(0);
+ default:
+ usage();
+ }
+ }
+ if (argc > 1)
+ usage();
+ /*
+ * Open the input file, or use DEF_LESSKEYINFILE if none specified.
+ */
+ if (argc > 0)
+ infile = *argv;
+ else
+ infile = homefile(DEF_LESSKEYINFILE);
+}
+
+/*
+ * Initialize data structures.
+ */
+ void
+init_tables()
+{
+ cmdtable.names = cmdnames;
+ cmdtable.pbuffer = cmdtable.buffer;
+
+ edittable.names = editnames;
+ edittable.pbuffer = edittable.buffer;
+
+ vartable.names = NULL;
+ vartable.pbuffer = vartable.buffer;
+}
+
+/*
+ * Parse one character of a string.
+ */
+ char *
+tstr(pp, xlate)
+ char **pp;
+ int xlate;
+{
+ register char *p;
+ register char ch;
+ register int i;
+ static char buf[10];
+ static char tstr_control_k[] =
+ { SK_SPECIAL_KEY, SK_CONTROL_K, 6, 1, 1, 1, '\0' };
+
+ p = *pp;
+ switch (*p)
+ {
+ case '\\':
+ ++p;
+ switch (*p)
+ {
+ case '0': case '1': case '2': case '3':
+ case '4': case '5': case '6': case '7':
+ /*
+ * Parse an octal number.
+ */
+ ch = 0;
+ i = 0;
+ do
+ ch = 8*ch + (*p - '0');
+ while (*++p >= '0' && *p <= '7' && ++i < 3);
+ *pp = p;
+ if (xlate && ch == CONTROL('K'))
+ return tstr_control_k;
+ buf[0] = ch;
+ buf[1] = '\0';
+ return (buf);
+ case 'b':
+ *pp = p+1;
+ return ("\b");
+ case 'e':
+ *pp = p+1;
+ buf[0] = ESC;
+ buf[1] = '\0';
+ return (buf);
+ case 'n':
+ *pp = p+1;
+ return ("\n");
+ case 'r':
+ *pp = p+1;
+ return ("\r");
+ case 't':
+ *pp = p+1;
+ return ("\t");
+ case 'k':
+ if (xlate)
+ {
+ switch (*++p)
+ {
+ case 'u': ch = SK_UP_ARROW; break;
+ case 'd': ch = SK_DOWN_ARROW; break;
+ case 'r': ch = SK_RIGHT_ARROW; break;
+ case 'l': ch = SK_LEFT_ARROW; break;
+ case 'U': ch = SK_PAGE_UP; break;
+ case 'D': ch = SK_PAGE_DOWN; break;
+ case 'h': ch = SK_HOME; break;
+ case 'e': ch = SK_END; break;
+ case 'x': ch = SK_DELETE; break;
+ default:
+ error("illegal char after \\k");
+ *pp = p+1;
+ return ("");
+ }
+ *pp = p+1;
+ buf[0] = SK_SPECIAL_KEY;
+ buf[1] = ch;
+ buf[2] = 6;
+ buf[3] = 1;
+ buf[4] = 1;
+ buf[5] = 1;
+ buf[6] = '\0';
+ return (buf);
+ }
+ /* FALLTHRU */
+ default:
+ /*
+ * Backslash followed by any other char
+ * just means that char.
+ */
+ *pp = p+1;
+ buf[0] = *p;
+ buf[1] = '\0';
+ if (xlate && buf[0] == CONTROL('K'))
+ return tstr_control_k;
+ return (buf);
+ }
+ case '^':
+ /*
+ * Caret means CONTROL.
+ */
+ *pp = p+2;
+ buf[0] = CONTROL(p[1]);
+ buf[1] = '\0';
+ if (buf[0] == CONTROL('K'))
+ return tstr_control_k;
+ return (buf);
+ }
+ *pp = p+1;
+ buf[0] = *p;
+ buf[1] = '\0';
+ if (xlate && buf[0] == CONTROL('K'))
+ return tstr_control_k;
+ return (buf);
+}
+
+/*
+ * Skip leading spaces in a string.
+ */
+ public char *
+skipsp(s)
+ register char *s;
+{
+ while (*s == ' ' || *s == '\t')
+ s++;
+ return (s);
+}
+
+/*
+ * Skip non-space characters in a string.
+ */
+ public char *
+skipnsp(s)
+ register char *s;
+{
+ while (*s != '\0' && *s != ' ' && *s != '\t')
+ s++;
+ return (s);
+}
+
+/*
+ * Clean up an input line:
+ * strip off the trailing newline & any trailing # comment.
+ */
+ char *
+clean_line(s)
+ char *s;
+{
+ register int i;
+
+ s = skipsp(s);
+ for (i = 0; s[i] != '\n' && s[i] != '\r' && s[i] != '\0'; i++)
+ if (s[i] == '#' && (i == 0 || s[i-1] != '\\'))
+ break;
+ s[i] = '\0';
+ return (s);
+}
+
+/*
+ * Add a byte to the output command table.
+ */
+ void
+add_cmd_char(c)
+ int c;
+{
+ if (currtable->pbuffer >= currtable->buffer + MAX_USERCMD)
+ {
+ error("too many commands");
+ exit(1);
+ }
+ *(currtable->pbuffer)++ = c;
+}
+
+/*
+ * Add a string to the output command table.
+ */
+ void
+add_cmd_str(s)
+ char *s;
+{
+ for ( ; *s != '\0'; s++)
+ add_cmd_char(*s);
+}
+
+/*
+ * See if we have a special "control" line.
+ */
+ int
+control_line(s)
+ char *s;
+{
+#define PREFIX(str,pat) (strncmp(str,pat,strlen(pat)) == 0)
+
+ if (PREFIX(s, "#line-edit"))
+ {
+ currtable = &edittable;
+ return (1);
+ }
+ if (PREFIX(s, "#command"))
+ {
+ currtable = &cmdtable;
+ return (1);
+ }
+ if (PREFIX(s, "#env"))
+ {
+ currtable = &vartable;
+ return (1);
+ }
+ if (PREFIX(s, "#stop"))
+ {
+ add_cmd_char('\0');
+ add_cmd_char(A_END_LIST);
+ return (1);
+ }
+ return (0);
+}
+
+/*
+ * Output some bytes.
+ */
+ void
+fputbytes(fd, buf, len)
+ FILE *fd;
+ char *buf;
+ int len;
+{
+ while (len-- > 0)
+ {
+ fwrite(buf, sizeof(char), 1, fd);
+ buf++;
+ }
+}
+
+/*
+ * Output an integer, in special KRADIX form.
+ */
+ void
+fputint(fd, val)
+ FILE *fd;
+ unsigned int val;
+{
+ char c;
+
+ if (val >= KRADIX*KRADIX)
+ {
+ fprintf(stderr, "error: integer too big (%d > %d)\n",
+ val, KRADIX*KRADIX);
+ exit(1);
+ }
+ c = val % KRADIX;
+ fwrite(&c, sizeof(char), 1, fd);
+ c = val / KRADIX;
+ fwrite(&c, sizeof(char), 1, fd);
+}
+
+/*
+ * Find an action, given the name of the action.
+ */
+ int
+findaction(actname)
+ char *actname;
+{
+ int i;
+
+ for (i = 0; currtable->names[i].cn_name != NULL; i++)
+ if (strcmp(currtable->names[i].cn_name, actname) == 0)
+ return (currtable->names[i].cn_action);
+ error("unknown action");
+ return (A_INVALID);
+}
+
+ void
+error(s)
+ char *s;
+{
+ fprintf(stderr, "line %d: %s\n", linenum, s);
+ errors++;
+}
+
+
+ void
+parse_cmdline(p)
+ char *p;
+{
+ int cmdlen;
+ char *actname;
+ int action;
+ char *s;
+ char c;
+
+ /*
+ * Parse the command string and store it in the current table.
+ */
+ cmdlen = 0;
+ do
+ {
+ s = tstr(&p, 1);
+ cmdlen += (int) strlen(s);
+ if (cmdlen > MAX_CMDLEN)
+ error("command too long");
+ else
+ add_cmd_str(s);
+ } while (*p != ' ' && *p != '\t' && *p != '\0');
+ /*
+ * Terminate the command string with a null byte.
+ */
+ add_cmd_char('\0');
+
+ /*
+ * Skip white space between the command string
+ * and the action name.
+ * Terminate the action name with a null byte.
+ */
+ p = skipsp(p);
+ if (*p == '\0')
+ {
+ error("missing action");
+ return;
+ }
+ actname = p;
+ p = skipnsp(p);
+ c = *p;
+ *p = '\0';
+
+ /*
+ * Parse the action name and store it in the current table.
+ */
+ action = findaction(actname);
+
+ /*
+ * See if an extra string follows the action name.
+ */
+ *p = c;
+ p = skipsp(p);
+ if (*p == '\0')
+ {
+ add_cmd_char(action);
+ } else
+ {
+ /*
+ * OR the special value A_EXTRA into the action byte.
+ * Put the extra string after the action byte.
+ */
+ add_cmd_char(action | A_EXTRA);
+ while (*p != '\0')
+ add_cmd_str(tstr(&p, 0));
+ add_cmd_char('\0');
+ }
+}
+
+ void
+parse_varline(p)
+ char *p;
+{
+ char *s;
+
+ do
+ {
+ s = tstr(&p, 0);
+ add_cmd_str(s);
+ } while (*p != ' ' && *p != '\t' && *p != '=' && *p != '\0');
+ /*
+ * Terminate the variable name with a null byte.
+ */
+ add_cmd_char('\0');
+
+ p = skipsp(p);
+ if (*p++ != '=')
+ {
+ error("missing =");
+ return;
+ }
+
+ add_cmd_char(EV_OK|A_EXTRA);
+
+ p = skipsp(p);
+ while (*p != '\0')
+ {
+ s = tstr(&p, 0);
+ add_cmd_str(s);
+ }
+ add_cmd_char('\0');
+}
+
+/*
+ * Parse a line from the lesskey file.
+ */
+ void
+parse_line(line)
+ char *line;
+{
+ char *p;
+
+ /*
+ * See if it is a control line.
+ */
+ if (control_line(line))
+ return;
+ /*
+ * Skip leading white space.
+ * Replace the final newline with a null byte.
+ * Ignore blank lines and comments.
+ */
+ p = clean_line(line);
+ if (*p == '\0')
+ return;
+
+ if (currtable == &vartable)
+ parse_varline(p);
+ else
+ parse_cmdline(p);
+}
+
+ int
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ FILE *desc;
+ FILE *out;
+ char line[1024];
+
+#ifdef WIN32
+ if (getenv("HOME") == NULL)
+ {
+ /*
+ * If there is no HOME environment variable,
+ * try the concatenation of HOMEDRIVE + HOMEPATH.
+ */
+ char *drive = getenv("HOMEDRIVE");
+ char *path = getenv("HOMEPATH");
+ if (drive != NULL && path != NULL)
+ {
+ char *env = (char *) calloc(strlen(drive) +
+ strlen(path) + 6, sizeof(char));
+ strcpy(env, "HOME=");
+ strcat(env, drive);
+ strcat(env, path);
+ putenv(env);
+ }
+ }
+#endif /* WIN32 */
+
+ /*
+ * Process command line arguments.
+ */
+ parse_args(argc, argv);
+ init_tables();
+
+ /*
+ * Open the input file.
+ */
+ if (strcmp(infile, "-") == 0)
+ desc = stdin;
+ else if ((desc = fopen(infile, "r")) == NULL)
+ {
+#if HAVE_PERROR
+ perror(infile);
+#else
+ fprintf(stderr, "Cannot open %s\n", infile);
+#endif
+ usage();
+ }
+
+ /*
+ * Read and parse the input file, one line at a time.
+ */
+ errors = 0;
+ linenum = 0;
+ while (fgets(line, sizeof(line), desc) != NULL)
+ {
+ ++linenum;
+ parse_line(line);
+ }
+
+ /*
+ * Write the output file.
+ * If no output file was specified, use "$HOME/.less"
+ */
+ if (errors > 0)
+ {
+ fprintf(stderr, "%d errors; no output produced\n", errors);
+ exit(1);
+ }
+
+ if (outfile == NULL)
+ outfile = getenv("LESSKEY");
+ if (outfile == NULL)
+ outfile = homefile(LESSKEYFILE);
+ if ((out = fopen(outfile, "wb")) == NULL)
+ {
+#if HAVE_PERROR
+ perror(outfile);
+#else
+ fprintf(stderr, "Cannot open %s\n", outfile);
+#endif
+ exit(1);
+ }
+
+ /* File header */
+ fputbytes(out, fileheader, sizeof(fileheader));
+
+ /* Command key section */
+ fputbytes(out, cmdsection, sizeof(cmdsection));
+ fputint(out, cmdtable.pbuffer - cmdtable.buffer);
+ fputbytes(out, (char *)cmdtable.buffer, cmdtable.pbuffer-cmdtable.buffer);
+ /* Edit key section */
+ fputbytes(out, editsection, sizeof(editsection));
+ fputint(out, edittable.pbuffer - edittable.buffer);
+ fputbytes(out, (char *)edittable.buffer, edittable.pbuffer-edittable.buffer);
+
+ /* Environment variable section */
+ fputbytes(out, varsection, sizeof(varsection));
+ fputint(out, vartable.pbuffer - vartable.buffer);
+ fputbytes(out, (char *)vartable.buffer, vartable.pbuffer-vartable.buffer);
+
+ /* File trailer */
+ fputbytes(out, endsection, sizeof(endsection));
+ fputbytes(out, filetrailer, sizeof(filetrailer));
+ return (0);
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Format of a lesskey file:
+ *
+ * LESSKEY_MAGIC (4 bytes)
+ * sections...
+ * END_LESSKEY_MAGIC (4 bytes)
+ *
+ * Each section is:
+ *
+ * section_MAGIC (1 byte)
+ * section_length (2 bytes)
+ * key table (section_length bytes)
+ */
+#define C0_LESSKEY_MAGIC '\0'
+#define C1_LESSKEY_MAGIC 'M'
+#define C2_LESSKEY_MAGIC '+'
+#define C3_LESSKEY_MAGIC 'G'
+
+#define CMD_SECTION 'c'
+#define EDIT_SECTION 'e'
+#define VAR_SECTION 'v'
+#define END_SECTION 'x'
+
+#define C0_END_LESSKEY_MAGIC 'E'
+#define C1_END_LESSKEY_MAGIC 'n'
+#define C2_END_LESSKEY_MAGIC 'd'
+
+/* */
+#define KRADIX 64
--- /dev/null
+LESSKEY(1) General Commands Manual LESSKEY(1)
+
+
+
+\e[1mNAME\e[0m
+ lesskey - specify key bindings for less
+
+\e[1mSYNOPSIS\e[0m
+ \e[1mlesskey [-o output] [--] [input]\e[0m
+ \e[1mlesskey [--output=output] [--] [input]\e[0m
+ \e[1mlesskey -V\e[0m
+ \e[1mlesskey --version\e[0m
+
+\e[1mDESCRIPTION\e[0m
+ \e[4mLesskey\e[24m is used to specify a set of key bindings to be used by \e[4mless.\e[0m
+ The input file is a text file which describes the key bindings. If the
+ input file is "-", standard input is read. If no input file is speci-
+ fied, a standard filename is used as the name of the input file, which
+ depends on the system being used: On Unix systems, $HOME/.lesskey is
+ used; on MS-DOS systems, $HOME/_lesskey is used; and on OS/2 systems
+ $HOME/lesskey.ini is used, or $INIT/lesskey.ini if $HOME is undefined.
+ The output file is a binary file which is used by \e[4mless.\e[24m If no output
+ file is specified, and the environment variable LESSKEY is set, the
+ value of LESSKEY is used as the name of the output file. Otherwise, a
+ standard filename is used as the name of the output file, which depends
+ on the system being used: On Unix and OS-9 systems, $HOME/.less is
+ used; on MS-DOS systems, $HOME/_less is used; and on OS/2 systems,
+ $HOME/less.ini is used, or $INIT/less.ini if $HOME is undefined. If
+ the output file already exists, \e[4mlesskey\e[24m will overwrite it.
+
+ The -V or --version option causes \e[4mlesskey\e[24m to print its version number
+ and immediately exit. If -V or --version is present, other options and
+ arguments are ignored.
+
+ The input file consists of one or more \e[4msections.\e[24m Each section starts
+ with a line that identifies the type of section. Possible sections
+ are:
+
+ #command
+ Defines new command keys.
+
+ #line-edit
+ Defines new line-editing keys.
+
+ #env Defines environment variables.
+
+ Blank lines and lines which start with a pound sign (#) are ignored,
+ except for the special section header lines.
+
+
+\e[1mCOMMAND SECTION\e[0m
+ The command section begins with the line
+
+ #command
+
+ If the command section is the first section in the file, this line may
+ be omitted. The command section consists of lines of the form:
+
+ \e[4mstring\e[24m <whitespace> \e[4maction\e[24m [extra-string] <newline>
+
+ Whitespace is any sequence of one or more spaces and/or tabs. The
+ \e[4mstring\e[24m is the command key(s) which invoke the action. The \e[4mstring\e[24m may
+ be a single command key, or a sequence of up to 15 keys. The \e[4maction\e[24m is
+ the name of the less action, from the list below. The characters in
+ the \e[4mstring\e[24m may appear literally, or be prefixed by a caret to indicate
+ a control key. A backslash followed by one to three octal digits may
+ be used to specify a character by its octal value. A backslash fol-
+ lowed by certain characters specifies input characters as follows:
+
+ \b BACKSPACE
+
+ \e ESCAPE
+
+ \n NEWLINE
+
+ \r RETURN
+
+ \t TAB
+
+ \ku UP ARROW
+
+ \kd DOWN ARROW
+
+ \kr RIGHT ARROW
+
+ \kl LEFT ARROW
+
+ \kU PAGE UP
+
+ \kD PAGE DOWN
+
+ \kh HOME
+
+ \ke END
+
+ \kx DELETE
+
+ A backslash followed by any other character indicates that character is
+ to be taken literally. Characters which must be preceded by backslash
+ include caret, space, tab and the backslash itself.
+
+ An action may be followed by an "extra" string. When such a command is
+ entered while running \e[4mless,\e[24m the action is performed, and then the extra
+ string is parsed, just as if it were typed in to \e[4mless.\e[24m This feature
+ can be used in certain cases to extend the functionality of a command.
+ For example, see the "{" and ":t" commands in the example below. The
+ extra string has a special meaning for the "quit" action: when \e[4mless\e[0m
+ quits, first character of the extra string is used as its exit status.
+
+
+\e[1mEXAMPLE\e[0m
+ The following input file describes the set of default command keys used
+ by less:
+
+ #command
+ \r forw-line
+ \n forw-line
+ e forw-line
+ j forw-line
+ \kd forw-line
+ ^E forw-line
+ ^N forw-line
+ k back-line
+ y back-line
+ ^Y back-line
+ ^K back-line
+ ^P back-line
+ J forw-line-force
+ K back-line-force
+ Y back-line-force
+ d forw-scroll
+ ^D forw-scroll
+ u back-scroll
+ ^U back-scroll
+ \40 forw-screen
+ f forw-screen
+ ^F forw-screen
+ ^V forw-screen
+ \kD forw-screen
+ b back-screen
+ ^B back-screen
+ \ev back-screen
+ \kU back-screen
+ z forw-window
+ w back-window
+ \e\40 forw-screen-force
+ F forw-forever
+ \eF forw-until-hilite
+ R repaint-flush
+ r repaint
+ ^R repaint
+ ^L repaint
+ \eu undo-hilite
+ g goto-line
+ \kh goto-line
+ < goto-line
+ \e< goto-line
+ p percent
+ % percent
+ \e[ left-scroll
+ \e] right-scroll
+ \e( left-scroll
+ \e) right-scroll
+ \kl left-scroll
+ \kr right-scroll
+ { forw-bracket {}
+ } back-bracket {}
+ ( forw-bracket ()
+ ) back-bracket ()
+ [ forw-bracket []
+ ] back-bracket []
+ \e^F forw-bracket
+ \e^B back-bracket
+ G goto-end
+ \e> goto-end
+ > goto-end
+ \ke goto-end
+ \eG goto-end-buffered
+ = status
+ ^G status
+ :f status
+ / forw-search
+ ? back-search
+ \e/ forw-search *
+ \e? back-search *
+ n repeat-search
+ \en repeat-search-all
+ N reverse-search
+ \eN reverse-search-all
+ & filter
+ m set-mark
+ ' goto-mark
+ ^X^X goto-mark
+ E examine
+ :e examine
+ ^X^V examine
+ :n next-file
+ :p prev-file
+ t next-tag
+ T prev-tag
+ :x index-file
+ :d remove-file
+ - toggle-option
+ :t toggle-option t
+ s toggle-option o
+ _ display-option
+ | pipe
+ v visual
+ ! shell
+ + firstcmd
+ H help
+ h help
+ V version
+ 0 digit
+ 1 digit
+ 2 digit
+ 3 digit
+ 4 digit
+ 5 digit
+ 6 digit
+ 7 digit
+ 8 digit
+ 9 digit
+ q quit
+ Q quit
+ :q quit
+ :Q quit
+ ZZ quit
+
+
+\e[1mPRECEDENCE\e[0m
+ Commands specified by \e[4mlesskey\e[24m take precedence over the default com-
+ mands. A default command key may be disabled by including it in the
+ input file with the action "invalid". Alternatively, a key may be
+ defined to do nothing by using the action "noaction". "noaction" is
+ similar to "invalid", but \e[4mless\e[24m will give an error beep for an "invalid"
+ command, but not for a "noaction" command. In addition, ALL default
+ commands may be disabled by adding this control line to the input file:
+
+ #stop
+
+ This will cause all default commands to be ignored. The #stop line
+ should be the last line in that section of the file.
+
+ Be aware that #stop can be dangerous. Since all default commands are
+ disabled, you must provide sufficient commands before the #stop line to
+ enable all necessary actions. For example, failure to provide a "quit"
+ command can lead to frustration.
+
+
+\e[1mLINE EDITING SECTION\e[0m
+ The line-editing section begins with the line:
+
+ #line-edit
+
+ This section specifies new key bindings for the line editing commands,
+ in a manner similar to the way key bindings for ordinary commands are
+ specified in the #command section. The line-editing section consists
+ of a list of keys and actions, one per line as in the example below.
+
+
+\e[1mEXAMPLE\e[0m
+ The following input file describes the set of default line-editing keys
+ used by less:
+
+ #line-edit
+ \t forw-complete
+ \17 back-complete
+ \e\t back-complete
+ ^L expand
+ ^V literal
+ ^A literal
+ \el right
+ \kr right
+ \eh left
+ \kl left
+ \eb word-left
+ \e\kl word-left
+ \ew word-right
+ \e\kr word-right
+ \ei insert
+ \ex delete
+ \kx delete
+ \eX word-delete
+ \ekx word-delete
+ \e\b word-backspace
+ \e0 home
+ \kh home
+ \e$ end
+ \ke end
+ \ek up
+ \ku up
+ \ej down
+ ^G abort
+
+
+
+\e[1mLESS ENVIRONMENT VARIABLES\e[0m
+ The environment variable section begins with the line
+
+ #env
+
+ Following this line is a list of environment variable assignments.
+ Each line consists of an environment variable name, an equals sign (=)
+ and the value to be assigned to the environment variable. White space
+ before and after the equals sign is ignored. Variables assigned in
+ this way are visible only to \e[4mless.\e[24m If a variable is specified in the
+ system environment and also in a lesskey file, the value in the lesskey
+ file takes precedence. Although the lesskey file can be used to over-
+ ride variables set in the environment, the main purpose of assigning
+ variables in the lesskey file is simply to have all \e[4mless\e[24m configuration
+ information stored in one file.
+
+
+\e[1mEXAMPLE\e[0m
+ The following input file sets the -i option whenever \e[4mless\e[24m is run, and
+ specifies the character set to be "latin1":
+
+ #env
+ LESS = -i
+ LESSCHARSET = latin1
+
+
+
+\e[1mSEE ALSO\e[0m
+ less(1)
+
+
+\e[1mWARNINGS\e[0m
+ On MS-DOS and OS/2 systems, certain keys send a sequence of characters
+ which start with a NUL character (0). This NUL character should be
+ represented as \340 in a lesskey file.
+
+
+\e[1mCOPYRIGHT\e[0m
+ Copyright (C) 1984-2015 Mark Nudelman
+
+ less is part of the GNU project and is free software. You can redis-
+ tribute it and/or modify it under the terms of either (1) the GNU Gen-
+ eral Public License as published by the Free Software Foundation; or
+ (2) the Less License. See the file README in the less distribution for
+ more details regarding redistribution. You should have received a copy
+ of the GNU General Public License along with the source for less; see
+ the file COPYING. If not, write to the Free Software Foundation, 59
+ Temple Place, Suite 330, Boston, MA 02111-1307, USA. You should also
+ have received a copy of the Less License; see the file LICENSE.
+
+ less is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FIT-
+ NESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+
+
+\e[1mAUTHOR\e[0m
+ Mark Nudelman
+ Send bug reports or comments to <bug-less@gnu.org>.
+
+
+
+ Version 481: 31 Aug 2015 LESSKEY(1)
--- /dev/null
+.TH LESSKEY 1 "Version 481: 31 Aug 2015"
+.SH NAME
+lesskey \- specify key bindings for less
+.SH SYNOPSIS
+.B "lesskey [-o output] [--] [input]"
+.br
+.B "lesskey [--output=output] [--] [input]"
+.br
+.B "lesskey -V"
+.br
+.B "lesskey --version"
+.SH DESCRIPTION
+.I Lesskey
+is used to specify a set of key bindings to be used by
+.I less.
+The input file is a text file which describes the key bindings.
+If the input file is "-", standard input is read.
+If no input file is specified, a standard filename is used
+as the name of the input file, which depends on the system being used:
+On Unix systems, $HOME/.lesskey is used;
+on MS-DOS systems, $HOME/_lesskey is used;
+and on OS/2 systems $HOME/lesskey.ini is used,
+or $INIT/lesskey.ini if $HOME is undefined.
+The output file is a binary file which is used by
+.I less.
+If no output file is specified,
+and the environment variable LESSKEY is set,
+the value of LESSKEY is used as the name of the output file.
+Otherwise, a standard filename is used as the name of the output file,
+which depends on the system being used:
+On Unix and OS-9 systems, $HOME/.less is used;
+on MS-DOS systems, $HOME/_less is used;
+and on OS/2 systems, $HOME/less.ini is used,
+or $INIT/less.ini if $HOME is undefined.
+If the output file already exists,
+.I lesskey
+will overwrite it.
+.PP
+The -V or --version option causes
+.I lesskey
+to print its version number and immediately exit.
+If -V or --version is present, other options and arguments are ignored.
+.PP
+The input file consists of one or more
+.I sections.
+Each section starts with a line that identifies the type of section.
+Possible sections are:
+.IP #command
+Defines new command keys.
+.IP #line-edit
+Defines new line-editing keys.
+.IP #env
+Defines environment variables.
+.PP
+Blank lines and lines which start with a pound sign (#) are ignored,
+except for the special section header lines.
+
+.SH "COMMAND SECTION"
+The command section begins with the line
+.sp
+#command
+.sp
+If the command section is the first section in the file,
+this line may be omitted.
+The command section consists of lines of the form:
+.sp
+ \fIstring\fP <whitespace> \fIaction\fP [extra-string] <newline>
+.sp
+Whitespace is any sequence of one or more spaces and/or tabs.
+The \fIstring\fP is the command key(s) which invoke the action.
+The \fIstring\fP may be a single command key, or a sequence of up to 15 keys.
+The \fIaction\fP is the name of the less action, from the list below.
+The characters in the \fIstring\fP may appear literally, or be
+prefixed by a caret to indicate a control key.
+A backslash followed by one to three octal digits may be used to
+specify a character by its octal value.
+A backslash followed by certain characters specifies input
+characters as follows:
+.IP \eb
+BACKSPACE
+.IP \ee
+ESCAPE
+.IP \en
+NEWLINE
+.IP \er
+RETURN
+.IP \et
+TAB
+.IP \eku
+UP ARROW
+.IP \ekd
+DOWN ARROW
+.IP \ekr
+RIGHT ARROW
+.IP \ekl
+LEFT ARROW
+.IP \ekU
+PAGE UP
+.IP \ekD
+PAGE DOWN
+.IP \ekh
+HOME
+.IP \eke
+END
+.IP \ekx
+DELETE
+.PP
+A backslash followed by any other character indicates that character is
+to be taken literally.
+Characters which must be preceded by backslash include
+caret, space, tab and the backslash itself.
+.PP
+An action may be followed by an "extra" string.
+When such a command is entered while running
+.I less,
+the action is performed, and then the extra
+string is parsed, just as if it were typed in to
+.I less.
+This feature can be used in certain cases to extend
+the functionality of a command.
+For example, see the "{" and ":t" commands in the example below.
+The extra string has a special meaning for the "quit" action:
+when
+.I less
+quits, first character of the extra string is used as its exit status.
+
+.SH EXAMPLE
+The following input file describes the set of
+default command keys used by less:
+.sp
+.nf
+ #command
+ \er forw-line
+ \en forw-line
+ e forw-line
+ j forw-line
+ \ekd forw-line
+ ^E forw-line
+ ^N forw-line
+ k back-line
+ y back-line
+ ^Y back-line
+ ^K back-line
+ ^P back-line
+ J forw-line-force
+ K back-line-force
+ Y back-line-force
+ d forw-scroll
+ ^D forw-scroll
+ u back-scroll
+ ^U back-scroll
+ \e40 forw-screen
+ f forw-screen
+ ^F forw-screen
+ ^V forw-screen
+ \ekD forw-screen
+ b back-screen
+ ^B back-screen
+ \eev back-screen
+ \ekU back-screen
+ z forw-window
+ w back-window
+ \ee\e40 forw-screen-force
+ F forw-forever
+ \eeF forw-until-hilite
+ R repaint-flush
+ r repaint
+ ^R repaint
+ ^L repaint
+ \eeu undo-hilite
+ g goto-line
+ \ekh goto-line
+ < goto-line
+ \ee< goto-line
+ p percent
+ % percent
+ \ee[ left-scroll
+ \ee] right-scroll
+ \ee( left-scroll
+ \ee) right-scroll
+ \ekl left-scroll
+ \ekr right-scroll
+ { forw-bracket {}
+ } back-bracket {}
+ ( forw-bracket ()
+ ) back-bracket ()
+ [ forw-bracket []
+ ] back-bracket []
+ \ee^F forw-bracket
+ \ee^B back-bracket
+ G goto-end
+ \ee> goto-end
+ > goto-end
+ \eke goto-end
+ \eeG goto-end-buffered
+ = status
+ ^G status
+ :f status
+ / forw-search
+ ? back-search
+ \ee/ forw-search *
+ \ee? back-search *
+ n repeat-search
+ \een repeat-search-all
+ N reverse-search
+ \eeN reverse-search-all
+ & filter
+ m set-mark
+ ' goto-mark
+ ^X^X goto-mark
+ E examine
+ :e examine
+ ^X^V examine
+ :n next-file
+ :p prev-file
+ t next-tag
+ T prev-tag
+ :x index-file
+ :d remove-file
+ - toggle-option
+ :t toggle-option t
+ s toggle-option o
+ _ display-option
+ | pipe
+ v visual
+ ! shell
+ + firstcmd
+ H help
+ h help
+ V version
+ 0 digit
+ 1 digit
+ 2 digit
+ 3 digit
+ 4 digit
+ 5 digit
+ 6 digit
+ 7 digit
+ 8 digit
+ 9 digit
+ q quit
+ Q quit
+ :q quit
+ :Q quit
+ ZZ quit
+.fi
+.sp
+.SH PRECEDENCE
+Commands specified by
+.I lesskey
+take precedence over the default commands.
+A default command key may be disabled by including it in the
+input file with the action "invalid".
+Alternatively, a key may be defined
+to do nothing by using the action "noaction".
+"noaction" is similar to "invalid", but
+.I less
+will give an error beep for an "invalid" command,
+but not for a "noaction" command.
+In addition, ALL default commands may be disabled by
+adding this control line to the input file:
+.sp
+#stop
+.sp
+This will cause all default commands to be ignored.
+The #stop line should be the last line in that section of the file.
+.PP
+Be aware that #stop can be dangerous.
+Since all default commands are disabled,
+you must provide sufficient commands before the #stop line
+to enable all necessary actions.
+For example, failure to provide a "quit" command can lead to frustration.
+
+.SH "LINE EDITING SECTION"
+The line-editing section begins with the line:
+.sp
+#line-edit
+.sp
+This section specifies new key bindings for the line editing commands,
+in a manner similar to the way key bindings for
+ordinary commands are specified in the #command section.
+The line-editing section consists of a list of keys and actions,
+one per line as in the example below.
+
+.SH EXAMPLE
+The following input file describes the set of
+default line-editing keys used by less:
+.sp
+.nf
+ #line-edit
+ \et forw-complete
+ \e17 back-complete
+ \ee\et back-complete
+ ^L expand
+ ^V literal
+ ^A literal
+ \eel right
+ \ekr right
+ \eeh left
+ \ekl left
+ \eeb word-left
+ \ee\ekl word-left
+ \eew word-right
+ \ee\ekr word-right
+ \eei insert
+ \eex delete
+ \ekx delete
+ \eeX word-delete
+ \eekx word-delete
+ \ee\eb word-backspace
+ \ee0 home
+ \ekh home
+ \ee$ end
+ \eke end
+ \eek up
+ \eku up
+ \eej down
+ ^G abort
+.fi
+.sp
+
+.SH "LESS ENVIRONMENT VARIABLES"
+The environment variable section begins with the line
+.sp
+#env
+.sp
+Following this line is a list of environment variable assignments.
+Each line consists of an environment variable name, an equals sign (=)
+and the value to be assigned to the environment variable.
+White space before and after the equals sign is ignored.
+Variables assigned in this way are visible only to
+.I less.
+If a variable is specified in the system environment and also in a
+lesskey file, the value in the lesskey file takes precedence.
+Although the lesskey file can be used to override variables set in the
+environment, the main purpose of assigning variables in the lesskey file
+is simply to have all
+.I less
+configuration information stored in one file.
+
+.SH EXAMPLE
+The following input file sets the -i option whenever
+.I less
+is run, and specifies the character set to be "latin1":
+.sp
+.nf
+ #env
+ LESS = -i
+ LESSCHARSET = latin1
+.fi
+.sp
+
+.SH "SEE ALSO"
+less(1)
+
+.SH WARNINGS
+On MS-DOS and OS/2 systems, certain keys send a sequence of characters
+which start with a NUL character (0).
+This NUL character should be represented as \e340 in a lesskey file.
+
+.SH COPYRIGHT
+Copyright (C) 1984-2015 Mark Nudelman
+.PP
+less is part of the GNU project and is free software.
+You can redistribute it and/or modify it
+under the terms of either
+(1) the GNU General Public License as published by
+the Free Software Foundation; or (2) the Less License.
+See the file README in the less distribution for more details
+regarding redistribution.
+You should have received a copy of the GNU General Public License
+along with the source for less; see the file COPYING.
+If not, write to the Free Software Foundation, 59 Temple Place,
+Suite 330, Boston, MA 02111-1307, USA.
+You should also have received a copy of the Less License;
+see the file LICENSE.
+.PP
+less is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.
+See the GNU General Public License for more details.
+
+.SH AUTHOR
+.PP
+Mark Nudelman
+.br
+Send bug reports or comments to <bug-less@gnu.org>.
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Macros to define the method of doing filename "globbing".
+ * There are three possible mechanisms:
+ * 1. GLOB_LIST
+ * This defines a function that returns a list of matching filenames.
+ * 2. GLOB_NAME
+ * This defines a function that steps thru the list of matching
+ * filenames, returning one name each time it is called.
+ * 3. GLOB_STRING
+ * This defines a function that returns the complete list of
+ * matching filenames as a single space-separated string.
+ */
+
+#if OS2
+
+#define DECL_GLOB_LIST(list) char **list; char **pp;
+#define GLOB_LIST(filename,list) list = _fnexplode(filename)
+#define GLOB_LIST_FAILED(list) list == NULL
+#define SCAN_GLOB_LIST(list,p) pp = list; *pp != NULL; pp++
+#define INIT_GLOB_LIST(list,p) p = *pp
+#define GLOB_LIST_DONE(list) _fnexplodefree(list)
+
+#else
+#if MSDOS_COMPILER==DJGPPC
+
+#define DECL_GLOB_LIST(list) glob_t list; int i;
+#define GLOB_LIST(filename,list) glob(filename,GLOB_NOCHECK,0,&list)
+#define GLOB_LIST_FAILED(list) 0
+#define SCAN_GLOB_LIST(list,p) i = 0; i < list.gl_pathc; i++
+#define INIT_GLOB_LIST(list,p) p = list.gl_pathv[i]
+#define GLOB_LIST_DONE(list) globfree(&list)
+
+#else
+#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
+
+#define GLOB_FIRST_NAME(filename,fndp,h) h = _dos_findfirst(filename, ~_A_VOLID, fndp)
+#define GLOB_FIRST_FAILED(handle) ((handle) != 0)
+#define GLOB_NEXT_NAME(handle,fndp) _dos_findnext(fndp)
+#define GLOB_NAME_DONE(handle)
+#define GLOB_NAME name
+#define DECL_GLOB_NAME(fnd,drive,dir,fname,ext,handle) \
+ struct find_t fnd; \
+ char drive[_MAX_DRIVE]; \
+ char dir[_MAX_DIR]; \
+ char fname[_MAX_FNAME]; \
+ char ext[_MAX_EXT]; \
+ int handle;
+#else
+#if MSDOS_COMPILER==WIN32C && defined(_MSC_VER)
+
+#define GLOB_FIRST_NAME(filename,fndp,h) h = _findfirst(filename, fndp)
+#define GLOB_FIRST_FAILED(handle) ((handle) == -1)
+#define GLOB_NEXT_NAME(handle,fndp) _findnext(handle, fndp)
+#define GLOB_NAME_DONE(handle) _findclose(handle)
+#define GLOB_NAME name
+#define DECL_GLOB_NAME(fnd,drive,dir,fname,ext,handle) \
+ struct _finddata_t fnd; \
+ char drive[_MAX_DRIVE]; \
+ char dir[_MAX_DIR]; \
+ char fname[_MAX_FNAME]; \
+ char ext[_MAX_EXT]; \
+ long handle;
+
+#else
+#if MSDOS_COMPILER==WIN32C && !defined(_MSC_VER) /* Borland C for Windows */
+
+#define GLOB_FIRST_NAME(filename,fndp,h) h = findfirst(filename, fndp, ~FA_LABEL)
+#define GLOB_FIRST_FAILED(handle) ((handle) != 0)
+#define GLOB_NEXT_NAME(handle,fndp) findnext(fndp)
+#define GLOB_NAME_DONE(handle)
+#define GLOB_NAME ff_name
+#define DECL_GLOB_NAME(fnd,drive,dir,fname,ext,handle) \
+ struct ffblk fnd; \
+ char drive[MAXDRIVE]; \
+ char dir[MAXDIR]; \
+ char fname[MAXFILE]; \
+ char ext[MAXEXT]; \
+ int handle;
+
+#endif
+#endif
+#endif
+#endif
+#endif
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines to manipulate the "line buffer".
+ * The line buffer holds a line of output as it is being built
+ * in preparation for output to the screen.
+ */
+
+#include "less.h"
+#include "charset.h"
+
+static char *linebuf = NULL; /* Buffer which holds the current output line */
+static char *attr = NULL; /* Extension of linebuf to hold attributes */
+public int size_linebuf = 0; /* Size of line buffer (and attr buffer) */
+
+static int cshift; /* Current left-shift of output line buffer */
+public int hshift; /* Desired left-shift of output line buffer */
+public int tabstops[TABSTOP_MAX] = { 0 }; /* Custom tabstops */
+public int ntabstops = 1; /* Number of tabstops */
+public int tabdefault = 8; /* Default repeated tabstops */
+public POSITION highest_hilite; /* Pos of last hilite in file found so far */
+
+static int curr; /* Index into linebuf */
+static int column; /* Printable length, accounting for
+ backspaces, etc. */
+static int overstrike; /* Next char should overstrike previous char */
+static int last_overstrike = AT_NORMAL;
+static int is_null_line; /* There is no current line */
+static int lmargin; /* Left margin */
+static LWCHAR pendc;
+static POSITION pendpos;
+static char *end_ansi_chars;
+static char *mid_ansi_chars;
+
+static int attr_swidth();
+static int attr_ewidth();
+static int do_append();
+
+extern int sigs;
+extern int bs_mode;
+extern int linenums;
+extern int ctldisp;
+extern int twiddle;
+extern int binattr;
+extern int status_col;
+extern int auto_wrap, ignaw;
+extern int bo_s_width, bo_e_width;
+extern int ul_s_width, ul_e_width;
+extern int bl_s_width, bl_e_width;
+extern int so_s_width, so_e_width;
+extern int sc_width, sc_height;
+extern int utf_mode;
+extern POSITION start_attnpos;
+extern POSITION end_attnpos;
+
+static char mbc_buf[MAX_UTF_CHAR_LEN];
+static int mbc_buf_len = 0;
+static int mbc_buf_index = 0;
+static POSITION mbc_pos;
+
+/*
+ * Initialize from environment variables.
+ */
+ public void
+init_line()
+{
+ end_ansi_chars = lgetenv("LESSANSIENDCHARS");
+ if (end_ansi_chars == NULL || *end_ansi_chars == '\0')
+ end_ansi_chars = "m";
+
+ mid_ansi_chars = lgetenv("LESSANSIMIDCHARS");
+ if (mid_ansi_chars == NULL || *mid_ansi_chars == '\0')
+ mid_ansi_chars = "0123456789:;[?!\"'#%()*+ ";
+
+ linebuf = (char *) ecalloc(LINEBUF_SIZE, sizeof(char));
+ attr = (char *) ecalloc(LINEBUF_SIZE, sizeof(char));
+ size_linebuf = LINEBUF_SIZE;
+}
+
+/*
+ * Expand the line buffer.
+ */
+ static int
+expand_linebuf()
+{
+ /* Double the size of the line buffer. */
+ int new_size = size_linebuf * 2;
+
+ /* Just realloc to expand the buffer, if we can. */
+#if HAVE_REALLOC
+ char *new_buf = (char *) realloc(linebuf, new_size);
+ char *new_attr = (char *) realloc(attr, new_size);
+#else
+ char *new_buf = (char *) calloc(new_size, sizeof(char));
+ char *new_attr = (char *) calloc(new_size, sizeof(char));
+#endif
+ if (new_buf == NULL || new_attr == NULL)
+ {
+ if (new_attr != NULL)
+ free(new_attr);
+ if (new_buf != NULL)
+ free(new_buf);
+ return 1;
+ }
+#if HAVE_REALLOC
+ /*
+ * We realloc'd the buffers; they already have the old contents.
+ */
+ #if 0
+ memset(new_buf + size_linebuf, 0, new_size - size_linebuf);
+ memset(new_attr + size_linebuf, 0, new_size - size_linebuf);
+ #endif
+#else
+ /*
+ * We just calloc'd the buffers; copy the old contents.
+ */
+ memcpy(new_buf, linebuf, size_linebuf * sizeof(char));
+ memcpy(new_attr, attr, size_linebuf * sizeof(char));
+ free(attr);
+ free(linebuf);
+#endif
+ linebuf = new_buf;
+ attr = new_attr;
+ size_linebuf = new_size;
+ return 0;
+}
+
+/*
+ * Is a character ASCII?
+ */
+ public int
+is_ascii_char(ch)
+ LWCHAR ch;
+{
+ return (ch <= 0x7F);
+}
+
+/*
+ * Rewind the line buffer.
+ */
+ public void
+prewind()
+{
+ curr = 0;
+ column = 0;
+ cshift = 0;
+ overstrike = 0;
+ last_overstrike = AT_NORMAL;
+ mbc_buf_len = 0;
+ is_null_line = 0;
+ pendc = '\0';
+ lmargin = 0;
+ if (status_col)
+ lmargin += 1;
+}
+
+/*
+ * Insert the line number (of the given position) into the line buffer.
+ */
+ public void
+plinenum(pos)
+ POSITION pos;
+{
+ register LINENUM linenum = 0;
+ register int i;
+
+ if (linenums == OPT_ONPLUS)
+ {
+ /*
+ * Get the line number and put it in the current line.
+ * {{ Note: since find_linenum calls forw_raw_line,
+ * it may seek in the input file, requiring the caller
+ * of plinenum to re-seek if necessary. }}
+ * {{ Since forw_raw_line modifies linebuf, we must
+ * do this first, before storing anything in linebuf. }}
+ */
+ linenum = find_linenum(pos);
+ }
+
+ /*
+ * Display a status column if the -J option is set.
+ */
+ if (status_col)
+ {
+ linebuf[curr] = ' ';
+ if (start_attnpos != NULL_POSITION &&
+ pos >= start_attnpos && pos < end_attnpos)
+ attr[curr] = AT_NORMAL|AT_HILITE;
+ else
+ attr[curr] = AT_NORMAL;
+ curr++;
+ column++;
+ }
+ /*
+ * Display the line number at the start of each line
+ * if the -N option is set.
+ */
+ if (linenums == OPT_ONPLUS)
+ {
+ char buf[INT_STRLEN_BOUND(pos) + 2];
+ int n;
+
+ linenumtoa(linenum, buf);
+ n = (int) strlen(buf);
+ if (n < MIN_LINENUM_WIDTH)
+ n = MIN_LINENUM_WIDTH;
+ sprintf(linebuf+curr, "%*s ", n, buf);
+ n++; /* One space after the line number. */
+ for (i = 0; i < n; i++)
+ attr[curr+i] = AT_NORMAL;
+ curr += n;
+ column += n;
+ lmargin += n;
+ }
+
+ /*
+ * Append enough spaces to bring us to the lmargin.
+ */
+ while (column < lmargin)
+ {
+ linebuf[curr] = ' ';
+ attr[curr++] = AT_NORMAL;
+ column++;
+ }
+}
+
+/*
+ * Shift the input line left.
+ * This means discarding N printable chars at the start of the buffer.
+ */
+ static void
+pshift(shift)
+ int shift;
+{
+ LWCHAR prev_ch = 0;
+ unsigned char c;
+ int shifted = 0;
+ int to;
+ int from;
+ int len;
+ int width;
+ int prev_attr;
+ int next_attr;
+
+ if (shift > column - lmargin)
+ shift = column - lmargin;
+ if (shift > curr - lmargin)
+ shift = curr - lmargin;
+
+ to = from = lmargin;
+ /*
+ * We keep on going when shifted == shift
+ * to get all combining chars.
+ */
+ while (shifted <= shift && from < curr)
+ {
+ c = linebuf[from];
+ if (ctldisp == OPT_ONPLUS && IS_CSI_START(c))
+ {
+ /* Keep cumulative effect. */
+ linebuf[to] = c;
+ attr[to++] = attr[from++];
+ while (from < curr && linebuf[from])
+ {
+ linebuf[to] = linebuf[from];
+ attr[to++] = attr[from];
+ if (!is_ansi_middle(linebuf[from++]))
+ break;
+ }
+ continue;
+ }
+
+ width = 0;
+
+ if (!IS_ASCII_OCTET(c) && utf_mode)
+ {
+ /* Assumes well-formedness validation already done. */
+ LWCHAR ch;
+
+ len = utf_len(c);
+ if (from + len > curr)
+ break;
+ ch = get_wchar(linebuf + from);
+ if (!is_composing_char(ch) && !is_combining_char(prev_ch, ch))
+ width = is_wide_char(ch) ? 2 : 1;
+ prev_ch = ch;
+ } else
+ {
+ len = 1;
+ if (c == '\b')
+ /* XXX - Incorrect if several '\b' in a row. */
+ width = (utf_mode && is_wide_char(prev_ch)) ? -2 : -1;
+ else if (!control_char(c))
+ width = 1;
+ prev_ch = 0;
+ }
+
+ if (width == 2 && shift - shifted == 1) {
+ /* Should never happen when called by pshift_all(). */
+ attr[to] = attr[from];
+ /*
+ * Assume a wide_char will never be the first half of a
+ * combining_char pair, so reset prev_ch in case we're
+ * followed by a '\b'.
+ */
+ prev_ch = linebuf[to++] = ' ';
+ from += len;
+ shifted++;
+ continue;
+ }
+
+ /* Adjust width for magic cookies. */
+ prev_attr = (to > 0) ? attr[to-1] : AT_NORMAL;
+ next_attr = (from + len < curr) ? attr[from + len] : prev_attr;
+ if (!is_at_equiv(attr[from], prev_attr) &&
+ !is_at_equiv(attr[from], next_attr))
+ {
+ width += attr_swidth(attr[from]);
+ if (from + len < curr)
+ width += attr_ewidth(attr[from]);
+ if (is_at_equiv(prev_attr, next_attr))
+ {
+ width += attr_ewidth(prev_attr);
+ if (from + len < curr)
+ width += attr_swidth(next_attr);
+ }
+ }
+
+ if (shift - shifted < width)
+ break;
+ from += len;
+ shifted += width;
+ if (shifted < 0)
+ shifted = 0;
+ }
+ while (from < curr)
+ {
+ linebuf[to] = linebuf[from];
+ attr[to++] = attr[from++];
+ }
+ curr = to;
+ column -= shifted;
+ cshift += shifted;
+}
+
+/*
+ *
+ */
+ public void
+pshift_all()
+{
+ pshift(column);
+}
+
+/*
+ * Return the printing width of the start (enter) sequence
+ * for a given character attribute.
+ */
+ static int
+attr_swidth(a)
+ int a;
+{
+ int w = 0;
+
+ a = apply_at_specials(a);
+
+ if (a & AT_UNDERLINE)
+ w += ul_s_width;
+ if (a & AT_BOLD)
+ w += bo_s_width;
+ if (a & AT_BLINK)
+ w += bl_s_width;
+ if (a & AT_STANDOUT)
+ w += so_s_width;
+
+ return w;
+}
+
+/*
+ * Return the printing width of the end (exit) sequence
+ * for a given character attribute.
+ */
+ static int
+attr_ewidth(a)
+ int a;
+{
+ int w = 0;
+
+ a = apply_at_specials(a);
+
+ if (a & AT_UNDERLINE)
+ w += ul_e_width;
+ if (a & AT_BOLD)
+ w += bo_e_width;
+ if (a & AT_BLINK)
+ w += bl_e_width;
+ if (a & AT_STANDOUT)
+ w += so_e_width;
+
+ return w;
+}
+
+/*
+ * Return the printing width of a given character and attribute,
+ * if the character were added to the current position in the line buffer.
+ * Adding a character with a given attribute may cause an enter or exit
+ * attribute sequence to be inserted, so this must be taken into account.
+ */
+ static int
+pwidth(ch, a, prev_ch)
+ LWCHAR ch;
+ int a;
+ LWCHAR prev_ch;
+{
+ int w;
+
+ if (ch == '\b')
+ /*
+ * Backspace moves backwards one or two positions.
+ * XXX - Incorrect if several '\b' in a row.
+ */
+ return (utf_mode && is_wide_char(prev_ch)) ? -2 : -1;
+
+ if (!utf_mode || is_ascii_char(ch))
+ {
+ if (control_char((char)ch))
+ {
+ /*
+ * Control characters do unpredictable things,
+ * so we don't even try to guess; say it doesn't move.
+ * This can only happen if the -r flag is in effect.
+ */
+ return (0);
+ }
+ } else
+ {
+ if (is_composing_char(ch) || is_combining_char(prev_ch, ch))
+ {
+ /*
+ * Composing and combining chars take up no space.
+ *
+ * Some terminals, upon failure to compose a
+ * composing character with the character(s) that
+ * precede(s) it will actually take up one column
+ * for the composing character; there isn't much
+ * we could do short of testing the (complex)
+ * composition process ourselves and printing
+ * a binary representation when it fails.
+ */
+ return (0);
+ }
+ }
+
+ /*
+ * Other characters take one or two columns,
+ * plus the width of any attribute enter/exit sequence.
+ */
+ w = 1;
+ if (is_wide_char(ch))
+ w++;
+ if (curr > 0 && !is_at_equiv(attr[curr-1], a))
+ w += attr_ewidth(attr[curr-1]);
+ if ((apply_at_specials(a) != AT_NORMAL) &&
+ (curr == 0 || !is_at_equiv(attr[curr-1], a)))
+ w += attr_swidth(a);
+ return (w);
+}
+
+/*
+ * Delete to the previous base character in the line buffer.
+ * Return 1 if one is found.
+ */
+ static int
+backc()
+{
+ LWCHAR prev_ch;
+ char *p = linebuf + curr;
+ LWCHAR ch = step_char(&p, -1, linebuf + lmargin);
+ int width;
+
+ /* This assumes that there is no '\b' in linebuf. */
+ while ( curr > lmargin
+ && column > lmargin
+ && (!(attr[curr - 1] & (AT_ANSI|AT_BINARY))))
+ {
+ curr = (int) (p - linebuf);
+ prev_ch = step_char(&p, -1, linebuf + lmargin);
+ width = pwidth(ch, attr[curr], prev_ch);
+ column -= width;
+ if (width > 0)
+ return 1;
+ ch = prev_ch;
+ }
+
+ return 0;
+}
+
+/*
+ * Are we currently within a recognized ANSI escape sequence?
+ */
+ static int
+in_ansi_esc_seq()
+{
+ char *p;
+
+ /*
+ * Search backwards for either an ESC (which means we ARE in a seq);
+ * or an end char (which means we're NOT in a seq).
+ */
+ for (p = &linebuf[curr]; p > linebuf; )
+ {
+ LWCHAR ch = step_char(&p, -1, linebuf);
+ if (IS_CSI_START(ch))
+ return (1);
+ if (!is_ansi_middle(ch))
+ return (0);
+ }
+ return (0);
+}
+
+/*
+ * Is a character the end of an ANSI escape sequence?
+ */
+ public int
+is_ansi_end(ch)
+ LWCHAR ch;
+{
+ if (!is_ascii_char(ch))
+ return (0);
+ return (strchr(end_ansi_chars, (char) ch) != NULL);
+}
+
+/*
+ *
+ */
+ public int
+is_ansi_middle(ch)
+ LWCHAR ch;
+{
+ if (!is_ascii_char(ch))
+ return (0);
+ if (is_ansi_end(ch))
+ return (0);
+ return (strchr(mid_ansi_chars, (char) ch) != NULL);
+}
+
+/*
+ * Append a character and attribute to the line buffer.
+ */
+#define STORE_CHAR(ch,a,rep,pos) \
+ do { \
+ if (store_char((ch),(a),(rep),(pos))) return (1); \
+ } while (0)
+
+ static int
+store_char(ch, a, rep, pos)
+ LWCHAR ch;
+ int a;
+ char *rep;
+ POSITION pos;
+{
+ int w;
+ int replen;
+ char cs;
+
+ w = (a & (AT_UNDERLINE|AT_BOLD)); /* Pre-use w. */
+ if (w != AT_NORMAL)
+ last_overstrike = w;
+
+#if HILITE_SEARCH
+ {
+ int matches;
+ if (is_hilited(pos, pos+1, 0, &matches))
+ {
+ /*
+ * This character should be highlighted.
+ * Override the attribute passed in.
+ */
+ if (a != AT_ANSI)
+ {
+ if (highest_hilite != NULL_POSITION &&
+ pos > highest_hilite)
+ highest_hilite = pos;
+ a |= AT_HILITE;
+ }
+ }
+ }
+#endif
+
+ if (ctldisp == OPT_ONPLUS && in_ansi_esc_seq())
+ {
+ if (!is_ansi_end(ch) && !is_ansi_middle(ch)) {
+ /* Remove whole unrecognized sequence. */
+ char *p = &linebuf[curr];
+ LWCHAR bch;
+ do {
+ bch = step_char(&p, -1, linebuf);
+ } while (p > linebuf && !IS_CSI_START(bch));
+ curr = (int) (p - linebuf);
+ return 0;
+ }
+ a = AT_ANSI; /* Will force re-AT_'ing around it. */
+ w = 0;
+ }
+ else if (ctldisp == OPT_ONPLUS && IS_CSI_START(ch))
+ {
+ a = AT_ANSI; /* Will force re-AT_'ing around it. */
+ w = 0;
+ }
+ else
+ {
+ char *p = &linebuf[curr];
+ LWCHAR prev_ch = step_char(&p, -1, linebuf);
+ w = pwidth(ch, a, prev_ch);
+ }
+
+ if (ctldisp != OPT_ON && column + w + attr_ewidth(a) > sc_width)
+ /*
+ * Won't fit on screen.
+ */
+ return (1);
+
+ if (rep == NULL)
+ {
+ cs = (char) ch;
+ rep = &cs;
+ replen = 1;
+ } else
+ {
+ replen = utf_len(rep[0]);
+ }
+ if (curr + replen >= size_linebuf-6)
+ {
+ /*
+ * Won't fit in line buffer.
+ * Try to expand it.
+ */
+ if (expand_linebuf())
+ return (1);
+ }
+
+ while (replen-- > 0)
+ {
+ linebuf[curr] = *rep++;
+ attr[curr] = a;
+ curr++;
+ }
+ column += w;
+ return (0);
+}
+
+/*
+ * Append a tab to the line buffer.
+ * Store spaces to represent the tab.
+ */
+#define STORE_TAB(a,pos) \
+ do { if (store_tab((a),(pos))) return (1); } while (0)
+
+ static int
+store_tab(attr, pos)
+ int attr;
+ POSITION pos;
+{
+ int to_tab = column + cshift - lmargin;
+ int i;
+
+ if (ntabstops < 2 || to_tab >= tabstops[ntabstops-1])
+ to_tab = tabdefault -
+ ((to_tab - tabstops[ntabstops-1]) % tabdefault);
+ else
+ {
+ for (i = ntabstops - 2; i >= 0; i--)
+ if (to_tab >= tabstops[i])
+ break;
+ to_tab = tabstops[i+1] - to_tab;
+ }
+
+ if (column + to_tab - 1 + pwidth(' ', attr, 0) + attr_ewidth(attr) > sc_width)
+ return 1;
+
+ do {
+ STORE_CHAR(' ', attr, " ", pos);
+ } while (--to_tab > 0);
+ return 0;
+}
+
+#define STORE_PRCHAR(c, pos) \
+ do { if (store_prchar((c), (pos))) return 1; } while (0)
+
+ static int
+store_prchar(c, pos)
+ LWCHAR c;
+ POSITION pos;
+{
+ char *s;
+
+ /*
+ * Convert to printable representation.
+ */
+ s = prchar(c);
+
+ /*
+ * Make sure we can get the entire representation
+ * of the character on this line.
+ */
+ if (column + (int) strlen(s) - 1 +
+ pwidth(' ', binattr, 0) + attr_ewidth(binattr) > sc_width)
+ return 1;
+
+ for ( ; *s != 0; s++)
+ STORE_CHAR(*s, AT_BINARY, NULL, pos);
+
+ return 0;
+}
+
+ static int
+flush_mbc_buf(pos)
+ POSITION pos;
+{
+ int i;
+
+ for (i = 0; i < mbc_buf_index; i++)
+ if (store_prchar(mbc_buf[i], pos))
+ return mbc_buf_index - i;
+
+ return 0;
+}
+
+/*
+ * Append a character to the line buffer.
+ * Expand tabs into spaces, handle underlining, boldfacing, etc.
+ * Returns 0 if ok, 1 if couldn't fit in buffer.
+ */
+ public int
+pappend(c, pos)
+ unsigned char c;
+ POSITION pos;
+{
+ int r;
+
+ if (pendc)
+ {
+ if (c == '\r' && pendc == '\r')
+ return (0);
+ if (do_append(pendc, NULL, pendpos))
+ /*
+ * Oops. We've probably lost the char which
+ * was in pendc, since caller won't back up.
+ */
+ return (1);
+ pendc = '\0';
+ }
+
+ if (c == '\r' && bs_mode == BS_SPECIAL)
+ {
+ if (mbc_buf_len > 0) /* utf_mode must be on. */
+ {
+ /* Flush incomplete (truncated) sequence. */
+ r = flush_mbc_buf(mbc_pos);
+ mbc_buf_index = r + 1;
+ mbc_buf_len = 0;
+ if (r)
+ return (mbc_buf_index);
+ }
+
+ /*
+ * Don't put the CR into the buffer until we see
+ * the next char. If the next char is a newline,
+ * discard the CR.
+ */
+ pendc = c;
+ pendpos = pos;
+ return (0);
+ }
+
+ if (!utf_mode)
+ {
+ r = do_append(c, NULL, pos);
+ } else
+ {
+ /* Perform strict validation in all possible cases. */
+ if (mbc_buf_len == 0)
+ {
+ retry:
+ mbc_buf_index = 1;
+ *mbc_buf = c;
+ if (IS_ASCII_OCTET(c))
+ r = do_append(c, NULL, pos);
+ else if (IS_UTF8_LEAD(c))
+ {
+ mbc_buf_len = utf_len(c);
+ mbc_pos = pos;
+ return (0);
+ } else
+ /* UTF8_INVALID or stray UTF8_TRAIL */
+ r = flush_mbc_buf(pos);
+ } else if (IS_UTF8_TRAIL(c))
+ {
+ mbc_buf[mbc_buf_index++] = c;
+ if (mbc_buf_index < mbc_buf_len)
+ return (0);
+ if (is_utf8_well_formed(mbc_buf, mbc_buf_index))
+ r = do_append(get_wchar(mbc_buf), mbc_buf, mbc_pos);
+ else
+ /* Complete, but not shortest form, sequence. */
+ mbc_buf_index = r = flush_mbc_buf(mbc_pos);
+ mbc_buf_len = 0;
+ } else
+ {
+ /* Flush incomplete (truncated) sequence. */
+ r = flush_mbc_buf(mbc_pos);
+ mbc_buf_index = r + 1;
+ mbc_buf_len = 0;
+ /* Handle new char. */
+ if (!r)
+ goto retry;
+ }
+ }
+
+ /*
+ * If we need to shift the line, do it.
+ * But wait until we get to at least the middle of the screen,
+ * so shifting it doesn't affect the chars we're currently
+ * pappending. (Bold & underline can get messed up otherwise.)
+ */
+ if (cshift < hshift && column > sc_width / 2)
+ {
+ linebuf[curr] = '\0';
+ pshift(hshift - cshift);
+ }
+ if (r)
+ {
+ /* How many chars should caller back up? */
+ r = (!utf_mode) ? 1 : mbc_buf_index;
+ }
+ return (r);
+}
+
+ static int
+do_append(ch, rep, pos)
+ LWCHAR ch;
+ char *rep;
+ POSITION pos;
+{
+ register int a;
+ LWCHAR prev_ch;
+
+ a = AT_NORMAL;
+
+ if (ch == '\b')
+ {
+ if (bs_mode == BS_CONTROL)
+ goto do_control_char;
+
+ /*
+ * A better test is needed here so we don't
+ * backspace over part of the printed
+ * representation of a binary character.
+ */
+ if ( curr <= lmargin
+ || column <= lmargin
+ || (attr[curr - 1] & (AT_ANSI|AT_BINARY)))
+ STORE_PRCHAR('\b', pos);
+ else if (bs_mode == BS_NORMAL)
+ STORE_CHAR(ch, AT_NORMAL, NULL, pos);
+ else if (bs_mode == BS_SPECIAL)
+ overstrike = backc();
+
+ return 0;
+ }
+
+ if (overstrike > 0)
+ {
+ /*
+ * Overstrike the character at the current position
+ * in the line buffer. This will cause either
+ * underline (if a "_" is overstruck),
+ * bold (if an identical character is overstruck),
+ * or just deletion of the character in the buffer.
+ */
+ overstrike = utf_mode ? -1 : 0;
+ if (utf_mode)
+ {
+ /* To be correct, this must be a base character. */
+ prev_ch = get_wchar(linebuf + curr);
+ } else
+ {
+ prev_ch = (unsigned char) linebuf[curr];
+ }
+ a = attr[curr];
+ if (ch == prev_ch)
+ {
+ /*
+ * Overstriking a char with itself means make it bold.
+ * But overstriking an underscore with itself is
+ * ambiguous. It could mean make it bold, or
+ * it could mean make it underlined.
+ * Use the previous overstrike to resolve it.
+ */
+ if (ch == '_')
+ {
+ if ((a & (AT_BOLD|AT_UNDERLINE)) != AT_NORMAL)
+ a |= (AT_BOLD|AT_UNDERLINE);
+ else if (last_overstrike != AT_NORMAL)
+ a |= last_overstrike;
+ else
+ a |= AT_BOLD;
+ } else
+ a |= AT_BOLD;
+ } else if (ch == '_')
+ {
+ a |= AT_UNDERLINE;
+ ch = prev_ch;
+ rep = linebuf + curr;
+ } else if (prev_ch == '_')
+ {
+ a |= AT_UNDERLINE;
+ }
+ /* Else we replace prev_ch, but we keep its attributes. */
+ } else if (overstrike < 0)
+ {
+ if ( is_composing_char(ch)
+ || is_combining_char(get_wchar(linebuf + curr), ch))
+ /* Continuation of the same overstrike. */
+ a = last_overstrike;
+ else
+ overstrike = 0;
+ }
+
+ if (ch == '\t')
+ {
+ /*
+ * Expand a tab into spaces.
+ */
+ switch (bs_mode)
+ {
+ case BS_CONTROL:
+ goto do_control_char;
+ case BS_NORMAL:
+ case BS_SPECIAL:
+ STORE_TAB(a, pos);
+ break;
+ }
+ } else if ((!utf_mode || is_ascii_char(ch)) && control_char((char)ch))
+ {
+ do_control_char:
+ if (ctldisp == OPT_ON || (ctldisp == OPT_ONPLUS && IS_CSI_START(ch)))
+ {
+ /*
+ * Output as a normal character.
+ */
+ STORE_CHAR(ch, AT_NORMAL, rep, pos);
+ } else
+ {
+ STORE_PRCHAR((char) ch, pos);
+ }
+ } else if (utf_mode && ctldisp != OPT_ON && is_ubin_char(ch))
+ {
+ char *s;
+
+ s = prutfchar(ch);
+
+ if (column + (int) strlen(s) - 1 +
+ pwidth(' ', binattr, 0) + attr_ewidth(binattr) > sc_width)
+ return (1);
+
+ for ( ; *s != 0; s++)
+ STORE_CHAR(*s, AT_BINARY, NULL, pos);
+ } else
+ {
+ STORE_CHAR(ch, a, rep, pos);
+ }
+ return (0);
+}
+
+/*
+ *
+ */
+ public int
+pflushmbc()
+{
+ int r = 0;
+
+ if (mbc_buf_len > 0)
+ {
+ /* Flush incomplete (truncated) sequence. */
+ r = flush_mbc_buf(mbc_pos);
+ mbc_buf_len = 0;
+ }
+ return r;
+}
+
+/*
+ * Terminate the line in the line buffer.
+ */
+ public void
+pdone(endline, forw)
+ int endline;
+ int forw;
+{
+ (void) pflushmbc();
+
+ if (pendc && (pendc != '\r' || !endline))
+ /*
+ * If we had a pending character, put it in the buffer.
+ * But discard a pending CR if we are at end of line
+ * (that is, discard the CR in a CR/LF sequence).
+ */
+ (void) do_append(pendc, NULL, pendpos);
+
+ /*
+ * Make sure we've shifted the line, if we need to.
+ */
+ if (cshift < hshift)
+ pshift(hshift - cshift);
+
+ if (ctldisp == OPT_ONPLUS && is_ansi_end('m'))
+ {
+ /* Switch to normal attribute at end of line. */
+ char *p = "\033[m";
+ for ( ; *p != '\0'; p++)
+ {
+ linebuf[curr] = *p;
+ attr[curr++] = AT_ANSI;
+ }
+ }
+
+ /*
+ * Add a newline if necessary,
+ * and append a '\0' to the end of the line.
+ * We output a newline if we're not at the right edge of the screen,
+ * or if the terminal doesn't auto wrap,
+ * or if this is really the end of the line AND the terminal ignores
+ * a newline at the right edge.
+ * (In the last case we don't want to output a newline if the terminal
+ * doesn't ignore it since that would produce an extra blank line.
+ * But we do want to output a newline if the terminal ignores it in case
+ * the next line is blank. In that case the single newline output for
+ * that blank line would be ignored!)
+ */
+ if (column < sc_width || !auto_wrap || (endline && ignaw) || ctldisp == OPT_ON)
+ {
+ linebuf[curr] = '\n';
+ attr[curr] = AT_NORMAL;
+ curr++;
+ }
+ else if (ignaw && column >= sc_width && forw)
+ {
+ /*
+ * Terminals with "ignaw" don't wrap until they *really* need
+ * to, i.e. when the character *after* the last one to fit on a
+ * line is output. But they are too hard to deal with when they
+ * get in the state where a full screen width of characters
+ * have been output but the cursor is sitting on the right edge
+ * instead of at the start of the next line.
+ * So we nudge them into wrapping by outputting a space
+ * character plus a backspace. But do this only if moving
+ * forward; if we're moving backward and drawing this line at
+ * the top of the screen, the space would overwrite the first
+ * char on the next line. We don't need to do this "nudge"
+ * at the top of the screen anyway.
+ */
+ linebuf[curr] = ' ';
+ attr[curr++] = AT_NORMAL;
+ linebuf[curr] = '\b';
+ attr[curr++] = AT_NORMAL;
+ }
+ linebuf[curr] = '\0';
+ attr[curr] = AT_NORMAL;
+}
+
+/*
+ *
+ */
+ public void
+set_status_col(c)
+ char c;
+{
+ linebuf[0] = c;
+ attr[0] = AT_NORMAL|AT_HILITE;
+}
+
+/*
+ * Get a character from the current line.
+ * Return the character as the function return value,
+ * and the character attribute in *ap.
+ */
+ public int
+gline(i, ap)
+ register int i;
+ register int *ap;
+{
+ if (is_null_line)
+ {
+ /*
+ * If there is no current line, we pretend the line is
+ * either "~" or "", depending on the "twiddle" flag.
+ */
+ if (twiddle)
+ {
+ if (i == 0)
+ {
+ *ap = AT_BOLD;
+ return '~';
+ }
+ --i;
+ }
+ /* Make sure we're back to AT_NORMAL before the '\n'. */
+ *ap = AT_NORMAL;
+ return i ? '\0' : '\n';
+ }
+
+ *ap = attr[i];
+ return (linebuf[i] & 0xFF);
+}
+
+/*
+ * Indicate that there is no current line.
+ */
+ public void
+null_line()
+{
+ is_null_line = 1;
+ cshift = 0;
+}
+
+/*
+ * Analogous to forw_line(), but deals with "raw lines":
+ * lines which are not split for screen width.
+ * {{ This is supposed to be more efficient than forw_line(). }}
+ */
+ public POSITION
+forw_raw_line(curr_pos, linep, line_lenp)
+ POSITION curr_pos;
+ char **linep;
+ int *line_lenp;
+{
+ register int n;
+ register int c;
+ POSITION new_pos;
+
+ if (curr_pos == NULL_POSITION || ch_seek(curr_pos) ||
+ (c = ch_forw_get()) == EOI)
+ return (NULL_POSITION);
+
+ n = 0;
+ for (;;)
+ {
+ if (c == '\n' || c == EOI || ABORT_SIGS())
+ {
+ new_pos = ch_tell();
+ break;
+ }
+ if (n >= size_linebuf-1)
+ {
+ if (expand_linebuf())
+ {
+ /*
+ * Overflowed the input buffer.
+ * Pretend the line ended here.
+ */
+ new_pos = ch_tell() - 1;
+ break;
+ }
+ }
+ linebuf[n++] = c;
+ c = ch_forw_get();
+ }
+ linebuf[n] = '\0';
+ if (linep != NULL)
+ *linep = linebuf;
+ if (line_lenp != NULL)
+ *line_lenp = n;
+ return (new_pos);
+}
+
+/*
+ * Analogous to back_line(), but deals with "raw lines".
+ * {{ This is supposed to be more efficient than back_line(). }}
+ */
+ public POSITION
+back_raw_line(curr_pos, linep, line_lenp)
+ POSITION curr_pos;
+ char **linep;
+ int *line_lenp;
+{
+ register int n;
+ register int c;
+ POSITION new_pos;
+
+ if (curr_pos == NULL_POSITION || curr_pos <= ch_zero() ||
+ ch_seek(curr_pos-1))
+ return (NULL_POSITION);
+
+ n = size_linebuf;
+ linebuf[--n] = '\0';
+ for (;;)
+ {
+ c = ch_back_get();
+ if (c == '\n' || ABORT_SIGS())
+ {
+ /*
+ * This is the newline ending the previous line.
+ * We have hit the beginning of the line.
+ */
+ new_pos = ch_tell() + 1;
+ break;
+ }
+ if (c == EOI)
+ {
+ /*
+ * We have hit the beginning of the file.
+ * This must be the first line in the file.
+ * This must, of course, be the beginning of the line.
+ */
+ new_pos = ch_zero();
+ break;
+ }
+ if (n <= 0)
+ {
+ int old_size_linebuf = size_linebuf;
+ char *fm;
+ char *to;
+ if (expand_linebuf())
+ {
+ /*
+ * Overflowed the input buffer.
+ * Pretend the line ended here.
+ */
+ new_pos = ch_tell() + 1;
+ break;
+ }
+ /*
+ * Shift the data to the end of the new linebuf.
+ */
+ for (fm = linebuf + old_size_linebuf - 1,
+ to = linebuf + size_linebuf - 1;
+ fm >= linebuf; fm--, to--)
+ *to = *fm;
+ n = size_linebuf - old_size_linebuf;
+ }
+ linebuf[--n] = c;
+ }
+ if (linep != NULL)
+ *linep = &linebuf[n];
+ if (line_lenp != NULL)
+ *line_lenp = size_linebuf - 1 - n;
+ return (new_pos);
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Code to handle displaying line numbers.
+ *
+ * Finding the line number of a given file position is rather tricky.
+ * We don't want to just start at the beginning of the file and
+ * count newlines, because that is slow for large files (and also
+ * wouldn't work if we couldn't get to the start of the file; e.g.
+ * if input is a long pipe).
+ *
+ * So we use the function add_lnum to cache line numbers.
+ * We try to be very clever and keep only the more interesting
+ * line numbers when we run out of space in our table. A line
+ * number is more interesting than another when it is far from
+ * other line numbers. For example, we'd rather keep lines
+ * 100,200,300 than 100,101,300. 200 is more interesting than
+ * 101 because 101 can be derived very cheaply from 100, while
+ * 200 is more expensive to derive from 100.
+ *
+ * The function currline() returns the line number of a given
+ * position in the file. As a side effect, it calls add_lnum
+ * to cache the line number. Therefore currline is occasionally
+ * called to make sure we cache line numbers often enough.
+ */
+
+#include "less.h"
+
+/*
+ * Structure to keep track of a line number and the associated file position.
+ * A doubly-linked circular list of line numbers is kept ordered by line number.
+ */
+struct linenum_info
+{
+ struct linenum_info *next; /* Link to next in the list */
+ struct linenum_info *prev; /* Line to previous in the list */
+ POSITION pos; /* File position */
+ POSITION gap; /* Gap between prev and next */
+ LINENUM line; /* Line number */
+};
+/*
+ * "gap" needs some explanation: the gap of any particular line number
+ * is the distance between the previous one and the next one in the list.
+ * ("Distance" means difference in file position.) In other words, the
+ * gap of a line number is the gap which would be introduced if this
+ * line number were deleted. It is used to decide which one to replace
+ * when we have a new one to insert and the table is full.
+ */
+
+#define NPOOL 200 /* Size of line number pool */
+
+#define LONGTIME (2) /* In seconds */
+
+static struct linenum_info anchor; /* Anchor of the list */
+static struct linenum_info *freelist; /* Anchor of the unused entries */
+static struct linenum_info pool[NPOOL]; /* The pool itself */
+static struct linenum_info *spare; /* We always keep one spare entry */
+
+extern int linenums;
+extern int sigs;
+extern int sc_height;
+extern int screen_trashed;
+
+/*
+ * Initialize the line number structures.
+ */
+ public void
+clr_linenum()
+{
+ register struct linenum_info *p;
+
+ /*
+ * Put all the entries on the free list.
+ * Leave one for the "spare".
+ */
+ for (p = pool; p < &pool[NPOOL-2]; p++)
+ p->next = p+1;
+ pool[NPOOL-2].next = NULL;
+ freelist = pool;
+
+ spare = &pool[NPOOL-1];
+
+ /*
+ * Initialize the anchor.
+ */
+ anchor.next = anchor.prev = &anchor;
+ anchor.gap = 0;
+ anchor.pos = (POSITION)0;
+ anchor.line = 1;
+}
+
+/*
+ * Calculate the gap for an entry.
+ */
+ static void
+calcgap(p)
+ register struct linenum_info *p;
+{
+ /*
+ * Don't bother to compute a gap for the anchor.
+ * Also don't compute a gap for the last one in the list.
+ * The gap for that last one should be considered infinite,
+ * but we never look at it anyway.
+ */
+ if (p == &anchor || p->next == &anchor)
+ return;
+ p->gap = p->next->pos - p->prev->pos;
+}
+
+/*
+ * Add a new line number to the cache.
+ * The specified position (pos) should be the file position of the
+ * FIRST character in the specified line.
+ */
+ public void
+add_lnum(linenum, pos)
+ LINENUM linenum;
+ POSITION pos;
+{
+ register struct linenum_info *p;
+ register struct linenum_info *new;
+ register struct linenum_info *nextp;
+ register struct linenum_info *prevp;
+ register POSITION mingap;
+
+ /*
+ * Find the proper place in the list for the new one.
+ * The entries are sorted by position.
+ */
+ for (p = anchor.next; p != &anchor && p->pos < pos; p = p->next)
+ if (p->line == linenum)
+ /* We already have this one. */
+ return;
+ nextp = p;
+ prevp = p->prev;
+
+ if (freelist != NULL)
+ {
+ /*
+ * We still have free (unused) entries.
+ * Use one of them.
+ */
+ new = freelist;
+ freelist = freelist->next;
+ } else
+ {
+ /*
+ * No free entries.
+ * Use the "spare" entry.
+ */
+ new = spare;
+ spare = NULL;
+ }
+
+ /*
+ * Fill in the fields of the new entry,
+ * and insert it into the proper place in the list.
+ */
+ new->next = nextp;
+ new->prev = prevp;
+ new->pos = pos;
+ new->line = linenum;
+
+ nextp->prev = new;
+ prevp->next = new;
+
+ /*
+ * Recalculate gaps for the new entry and the neighboring entries.
+ */
+ calcgap(new);
+ calcgap(nextp);
+ calcgap(prevp);
+
+ if (spare == NULL)
+ {
+ /*
+ * We have used the spare entry.
+ * Scan the list to find the one with the smallest
+ * gap, take it out and make it the spare.
+ * We should never remove the last one, so stop when
+ * we get to p->next == &anchor. This also avoids
+ * looking at the gap of the last one, which is
+ * not computed by calcgap.
+ */
+ mingap = anchor.next->gap;
+ for (p = anchor.next; p->next != &anchor; p = p->next)
+ {
+ if (p->gap <= mingap)
+ {
+ spare = p;
+ mingap = p->gap;
+ }
+ }
+ spare->next->prev = spare->prev;
+ spare->prev->next = spare->next;
+ }
+}
+
+/*
+ * If we get stuck in a long loop trying to figure out the
+ * line number, print a message to tell the user what we're doing.
+ */
+ static void
+longloopmessage()
+{
+ ierror("Calculating line numbers", NULL_PARG);
+}
+
+static int loopcount;
+#if HAVE_TIME
+static time_type startime;
+#endif
+
+ static void
+longish()
+{
+#if HAVE_TIME
+ if (loopcount >= 0 && ++loopcount > 100)
+ {
+ loopcount = 0;
+ if (get_time() >= startime + LONGTIME)
+ {
+ longloopmessage();
+ loopcount = -1;
+ }
+ }
+#else
+ if (loopcount >= 0 && ++loopcount > LONGLOOP)
+ {
+ longloopmessage();
+ loopcount = -1;
+ }
+#endif
+}
+
+/*
+ * Turn off line numbers because the user has interrupted
+ * a lengthy line number calculation.
+ */
+ static void
+abort_long()
+{
+ if (linenums == OPT_ONPLUS)
+ /*
+ * We were displaying line numbers, so need to repaint.
+ */
+ screen_trashed = 1;
+ linenums = 0;
+ error("Line numbers turned off", NULL_PARG);
+}
+
+/*
+ * Find the line number associated with a given position.
+ * Return 0 if we can't figure it out.
+ */
+ public LINENUM
+find_linenum(pos)
+ POSITION pos;
+{
+ register struct linenum_info *p;
+ register LINENUM linenum;
+ POSITION cpos;
+
+ if (!linenums)
+ /*
+ * We're not using line numbers.
+ */
+ return (0);
+ if (pos == NULL_POSITION)
+ /*
+ * Caller doesn't know what he's talking about.
+ */
+ return (0);
+ if (pos <= ch_zero())
+ /*
+ * Beginning of file is always line number 1.
+ */
+ return (1);
+
+ /*
+ * Find the entry nearest to the position we want.
+ */
+ for (p = anchor.next; p != &anchor && p->pos < pos; p = p->next)
+ continue;
+ if (p->pos == pos)
+ /* Found it exactly. */
+ return (p->line);
+
+ /*
+ * This is the (possibly) time-consuming part.
+ * We start at the line we just found and start
+ * reading the file forward or backward till we
+ * get to the place we want.
+ *
+ * First decide whether we should go forward from the
+ * previous one or backwards from the next one.
+ * The decision is based on which way involves
+ * traversing fewer bytes in the file.
+ */
+#if HAVE_TIME
+ startime = get_time();
+#endif
+ if (p == &anchor || pos - p->prev->pos < p->pos - pos)
+ {
+ /*
+ * Go forward.
+ */
+ p = p->prev;
+ if (ch_seek(p->pos))
+ return (0);
+ loopcount = 0;
+ for (linenum = p->line, cpos = p->pos; cpos < pos; linenum++)
+ {
+ /*
+ * Allow a signal to abort this loop.
+ */
+ cpos = forw_raw_line(cpos, (char **)NULL, (int *)NULL);
+ if (ABORT_SIGS()) {
+ abort_long();
+ return (0);
+ }
+ if (cpos == NULL_POSITION)
+ return (0);
+ longish();
+ }
+ /*
+ * We might as well cache it.
+ */
+ add_lnum(linenum, cpos);
+ /*
+ * If the given position is not at the start of a line,
+ * make sure we return the correct line number.
+ */
+ if (cpos > pos)
+ linenum--;
+ } else
+ {
+ /*
+ * Go backward.
+ */
+ if (ch_seek(p->pos))
+ return (0);
+ loopcount = 0;
+ for (linenum = p->line, cpos = p->pos; cpos > pos; linenum--)
+ {
+ /*
+ * Allow a signal to abort this loop.
+ */
+ cpos = back_raw_line(cpos, (char **)NULL, (int *)NULL);
+ if (ABORT_SIGS()) {
+ abort_long();
+ return (0);
+ }
+ if (cpos == NULL_POSITION)
+ return (0);
+ longish();
+ }
+ /*
+ * We might as well cache it.
+ */
+ add_lnum(linenum, cpos);
+ }
+
+ return (linenum);
+}
+
+/*
+ * Find the position of a given line number.
+ * Return NULL_POSITION if we can't figure it out.
+ */
+ public POSITION
+find_pos(linenum)
+ LINENUM linenum;
+{
+ register struct linenum_info *p;
+ POSITION cpos;
+ LINENUM clinenum;
+
+ if (linenum <= 1)
+ /*
+ * Line number 1 is beginning of file.
+ */
+ return (ch_zero());
+
+ /*
+ * Find the entry nearest to the line number we want.
+ */
+ for (p = anchor.next; p != &anchor && p->line < linenum; p = p->next)
+ continue;
+ if (p->line == linenum)
+ /* Found it exactly. */
+ return (p->pos);
+
+ if (p == &anchor || linenum - p->prev->line < p->line - linenum)
+ {
+ /*
+ * Go forward.
+ */
+ p = p->prev;
+ if (ch_seek(p->pos))
+ return (NULL_POSITION);
+ for (clinenum = p->line, cpos = p->pos; clinenum < linenum; clinenum++)
+ {
+ /*
+ * Allow a signal to abort this loop.
+ */
+ cpos = forw_raw_line(cpos, (char **)NULL, (int *)NULL);
+ if (ABORT_SIGS())
+ return (NULL_POSITION);
+ if (cpos == NULL_POSITION)
+ return (NULL_POSITION);
+ }
+ } else
+ {
+ /*
+ * Go backward.
+ */
+ if (ch_seek(p->pos))
+ return (NULL_POSITION);
+ for (clinenum = p->line, cpos = p->pos; clinenum > linenum; clinenum--)
+ {
+ /*
+ * Allow a signal to abort this loop.
+ */
+ cpos = back_raw_line(cpos, (char **)NULL, (int *)NULL);
+ if (ABORT_SIGS())
+ return (NULL_POSITION);
+ if (cpos == NULL_POSITION)
+ return (NULL_POSITION);
+ }
+ }
+ /*
+ * We might as well cache it.
+ */
+ add_lnum(clinenum, cpos);
+ return (cpos);
+}
+
+/*
+ * Return the line number of the "current" line.
+ * The argument "where" tells which line is to be considered
+ * the "current" line (e.g. TOP, BOTTOM, MIDDLE, etc).
+ */
+ public LINENUM
+currline(where)
+ int where;
+{
+ POSITION pos;
+ POSITION len;
+ LINENUM linenum;
+
+ pos = position(where);
+ len = ch_length();
+ while (pos == NULL_POSITION && where >= 0 && where < sc_height)
+ pos = position(++where);
+ if (pos == NULL_POSITION)
+ pos = len;
+ linenum = find_linenum(pos);
+ if (pos == len)
+ linenum--;
+ return (linenum);
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines to execute other programs.
+ * Necessarily very OS dependent.
+ */
+
+#include "less.h"
+#include <signal.h>
+#include "position.h"
+
+#if MSDOS_COMPILER
+#include <dos.h>
+#ifdef _MSC_VER
+#include <direct.h>
+#define setdisk(n) _chdrive((n)+1)
+#else
+#include <dir.h>
+#endif
+#endif
+
+extern int screen_trashed;
+extern IFILE curr_ifile;
+
+
+#if HAVE_SYSTEM
+
+/*
+ * Pass the specified command to a shell to be executed.
+ * Like plain "system()", but handles resetting terminal modes, etc.
+ */
+ public void
+lsystem(cmd, donemsg)
+ char *cmd;
+ char *donemsg;
+{
+ register int inp;
+#if HAVE_SHELL
+ register char *shell;
+ register char *p;
+#endif
+ IFILE save_ifile;
+#if MSDOS_COMPILER && MSDOS_COMPILER!=WIN32C
+ char cwd[FILENAME_MAX+1];
+#endif
+
+ /*
+ * Print the command which is to be executed,
+ * unless the command starts with a "-".
+ */
+ if (cmd[0] == '-')
+ cmd++;
+ else
+ {
+ clear_bot();
+ putstr("!");
+ putstr(cmd);
+ putstr("\n");
+ }
+
+#if MSDOS_COMPILER
+#if MSDOS_COMPILER==WIN32C
+ if (*cmd == '\0')
+ cmd = getenv("COMSPEC");
+#else
+ /*
+ * Working directory is global on MSDOS.
+ * The child might change the working directory, so we
+ * must save and restore CWD across calls to "system",
+ * or else we won't find our file when we return and
+ * try to "reedit_ifile" it.
+ */
+ getcwd(cwd, FILENAME_MAX);
+#endif
+#endif
+
+ /*
+ * Close the current input file.
+ */
+ save_ifile = save_curr_ifile();
+ (void) edit_ifile(NULL_IFILE);
+
+ /*
+ * De-initialize the terminal and take out of raw mode.
+ */
+ deinit();
+ flush(); /* Make sure the deinit chars get out */
+ raw_mode(0);
+#if MSDOS_COMPILER==WIN32C
+ close_getchr();
+#endif
+
+ /*
+ * Restore signals to their defaults.
+ */
+ init_signals(0);
+
+#if HAVE_DUP
+ /*
+ * Force standard input to be the user's terminal
+ * (the normal standard input), even if less's standard input
+ * is coming from a pipe.
+ */
+ inp = dup(0);
+ close(0);
+#if OS2
+ /* The __open() system call translates "/dev/tty" to "con". */
+ if (__open("/dev/tty", OPEN_READ) < 0)
+#else
+ if (open("/dev/tty", OPEN_READ) < 0)
+#endif
+ dup(inp);
+#endif
+
+ /*
+ * Pass the command to the system to be executed.
+ * If we have a SHELL environment variable, use
+ * <$SHELL -c "command"> instead of just <command>.
+ * If the command is empty, just invoke a shell.
+ */
+#if HAVE_SHELL
+ p = NULL;
+ if ((shell = lgetenv("SHELL")) != NULL && *shell != '\0')
+ {
+ if (*cmd == '\0')
+ p = save(shell);
+ else
+ {
+ char *esccmd = shell_quote(cmd);
+ if (esccmd != NULL)
+ {
+ int len = (int) (strlen(shell) + strlen(esccmd) + 5);
+ p = (char *) ecalloc(len, sizeof(char));
+ SNPRINTF3(p, len, "%s %s %s", shell, shell_coption(), esccmd);
+ free(esccmd);
+ }
+ }
+ }
+ if (p == NULL)
+ {
+ if (*cmd == '\0')
+ p = save("sh");
+ else
+ p = save(cmd);
+ }
+ system(p);
+ free(p);
+#else
+#if MSDOS_COMPILER==DJGPPC
+ /*
+ * Make stdin of the child be in cooked mode.
+ */
+ setmode(0, O_TEXT);
+ /*
+ * We don't need to catch signals of the child (it
+ * also makes trouble with some DPMI servers).
+ */
+ __djgpp_exception_toggle();
+ system(cmd);
+ __djgpp_exception_toggle();
+#else
+ system(cmd);
+#endif
+#endif
+
+#if HAVE_DUP
+ /*
+ * Restore standard input, reset signals, raw mode, etc.
+ */
+ close(0);
+ dup(inp);
+ close(inp);
+#endif
+
+#if MSDOS_COMPILER==WIN32C
+ open_getchr();
+#endif
+ init_signals(1);
+ raw_mode(1);
+ if (donemsg != NULL)
+ {
+ putstr(donemsg);
+ putstr(" (press RETURN)");
+ get_return();
+ putchr('\n');
+ flush();
+ }
+ init();
+ screen_trashed = 1;
+
+#if MSDOS_COMPILER && MSDOS_COMPILER!=WIN32C
+ /*
+ * Restore the previous directory (possibly
+ * changed by the child program we just ran).
+ */
+ chdir(cwd);
+#if MSDOS_COMPILER != DJGPPC
+ /*
+ * Some versions of chdir() don't change to the drive
+ * which is part of CWD. (DJGPP does this in chdir.)
+ */
+ if (cwd[1] == ':')
+ {
+ if (cwd[0] >= 'a' && cwd[0] <= 'z')
+ setdisk(cwd[0] - 'a');
+ else if (cwd[0] >= 'A' && cwd[0] <= 'Z')
+ setdisk(cwd[0] - 'A');
+ }
+#endif
+#endif
+
+ /*
+ * Reopen the current input file.
+ */
+ reedit_ifile(save_ifile);
+
+#if defined(SIGWINCH) || defined(SIGWIND)
+ /*
+ * Since we were ignoring window change signals while we executed
+ * the system command, we must assume the window changed.
+ * Warning: this leaves a signal pending (in "sigs"),
+ * so psignals() should be called soon after lsystem().
+ */
+ winch(0);
+#endif
+}
+
+#endif
+
+#if PIPEC
+
+/*
+ * Pipe a section of the input file into the given shell command.
+ * The section to be piped is the section "between" the current
+ * position and the position marked by the given letter.
+ *
+ * If the mark is after the current screen, the section between
+ * the top line displayed and the mark is piped.
+ * If the mark is before the current screen, the section between
+ * the mark and the bottom line displayed is piped.
+ * If the mark is on the current screen, or if the mark is ".",
+ * the whole current screen is piped.
+ */
+ public int
+pipe_mark(c, cmd)
+ int c;
+ char *cmd;
+{
+ POSITION mpos, tpos, bpos;
+
+ /*
+ * mpos = the marked position.
+ * tpos = top of screen.
+ * bpos = bottom of screen.
+ */
+ mpos = markpos(c);
+ if (mpos == NULL_POSITION)
+ return (-1);
+ tpos = position(TOP);
+ if (tpos == NULL_POSITION)
+ tpos = ch_zero();
+ bpos = position(BOTTOM);
+
+ if (c == '.')
+ return (pipe_data(cmd, tpos, bpos));
+ else if (mpos <= tpos)
+ return (pipe_data(cmd, mpos, bpos));
+ else if (bpos == NULL_POSITION)
+ return (pipe_data(cmd, tpos, bpos));
+ else
+ return (pipe_data(cmd, tpos, mpos));
+}
+
+/*
+ * Create a pipe to the given shell command.
+ * Feed it the file contents between the positions spos and epos.
+ */
+ public int
+pipe_data(cmd, spos, epos)
+ char *cmd;
+ POSITION spos;
+ POSITION epos;
+{
+ register FILE *f;
+ register int c;
+ extern FILE *popen();
+
+ /*
+ * This is structured much like lsystem().
+ * Since we're running a shell program, we must be careful
+ * to perform the necessary deinitialization before running
+ * the command, and reinitialization after it.
+ */
+ if (ch_seek(spos) != 0)
+ {
+ error("Cannot seek to start position", NULL_PARG);
+ return (-1);
+ }
+
+ if ((f = popen(cmd, "w")) == NULL)
+ {
+ error("Cannot create pipe", NULL_PARG);
+ return (-1);
+ }
+ clear_bot();
+ putstr("!");
+ putstr(cmd);
+ putstr("\n");
+
+ deinit();
+ flush();
+ raw_mode(0);
+ init_signals(0);
+#if MSDOS_COMPILER==WIN32C
+ close_getchr();
+#endif
+#ifdef SIGPIPE
+ LSIGNAL(SIGPIPE, SIG_IGN);
+#endif
+
+ c = EOI;
+ while (epos == NULL_POSITION || spos++ <= epos)
+ {
+ /*
+ * Read a character from the file and give it to the pipe.
+ */
+ c = ch_forw_get();
+ if (c == EOI)
+ break;
+ if (putc(c, f) == EOF)
+ break;
+ }
+
+ /*
+ * Finish up the last line.
+ */
+ while (c != '\n' && c != EOI )
+ {
+ c = ch_forw_get();
+ if (c == EOI)
+ break;
+ if (putc(c, f) == EOF)
+ break;
+ }
+
+ pclose(f);
+
+#ifdef SIGPIPE
+ LSIGNAL(SIGPIPE, SIG_DFL);
+#endif
+#if MSDOS_COMPILER==WIN32C
+ open_getchr();
+#endif
+ init_signals(1);
+ raw_mode(1);
+ init();
+ screen_trashed = 1;
+#if defined(SIGWINCH) || defined(SIGWIND)
+ /* {{ Probably don't need this here. }} */
+ winch(0);
+#endif
+ return (0);
+}
+
+#endif
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Entry point, initialization, miscellaneous routines.
+ */
+
+#include "less.h"
+#if MSDOS_COMPILER==WIN32C
+#include <windows.h>
+#endif
+
+public char * every_first_cmd = NULL;
+public int new_file;
+public int is_tty;
+public IFILE curr_ifile = NULL_IFILE;
+public IFILE old_ifile = NULL_IFILE;
+public struct scrpos initial_scrpos;
+public int any_display = FALSE;
+public POSITION start_attnpos = NULL_POSITION;
+public POSITION end_attnpos = NULL_POSITION;
+public int wscroll;
+public char * progname;
+public int quitting;
+public int secure;
+public int dohelp;
+
+#if LOGFILE
+public int logfile = -1;
+public int force_logfile = FALSE;
+public char * namelogfile = NULL;
+#endif
+
+#if EDITOR
+public char * editor;
+public char * editproto;
+#endif
+
+#if TAGS
+extern char * tags;
+extern char * tagoption;
+extern int jump_sline;
+#endif
+
+#ifdef WIN32
+static char consoleTitle[256];
+#endif
+
+extern int less_is_more;
+extern int missing_cap;
+extern int know_dumb;
+extern int pr_type;
+
+
+/*
+ * Entry point.
+ */
+int
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ IFILE ifile;
+ char *s;
+
+#ifdef __EMX__
+ _response(&argc, &argv);
+ _wildcard(&argc, &argv);
+#endif
+
+ progname = *argv++;
+ argc--;
+
+ secure = 0;
+ s = lgetenv("LESSSECURE");
+ if (s != NULL && *s != '\0')
+ secure = 1;
+
+#ifdef WIN32
+ if (getenv("HOME") == NULL)
+ {
+ /*
+ * If there is no HOME environment variable,
+ * try the concatenation of HOMEDRIVE + HOMEPATH.
+ */
+ char *drive = getenv("HOMEDRIVE");
+ char *path = getenv("HOMEPATH");
+ if (drive != NULL && path != NULL)
+ {
+ char *env = (char *) ecalloc(strlen(drive) +
+ strlen(path) + 6, sizeof(char));
+ strcpy(env, "HOME=");
+ strcat(env, drive);
+ strcat(env, path);
+ putenv(env);
+ }
+ }
+ GetConsoleTitle(consoleTitle, sizeof(consoleTitle)/sizeof(char));
+#endif /* WIN32 */
+
+ /*
+ * Process command line arguments and LESS environment arguments.
+ * Command line arguments override environment arguments.
+ */
+ is_tty = isatty(1);
+ get_term();
+ init_cmds();
+ init_charset();
+ init_line();
+ init_cmdhist();
+ init_option();
+ init_search();
+
+ /*
+ * If the name of the executable program is "more",
+ * act like LESS_IS_MORE is set.
+ */
+ for (s = progname + strlen(progname); s > progname; s--)
+ {
+ if (s[-1] == PATHNAME_SEP[0])
+ break;
+ }
+ if (strcmp(s, "more") == 0)
+ less_is_more = 1;
+
+ init_prompt();
+
+ s = lgetenv(less_is_more ? "MORE" : "LESS");
+ if (s != NULL)
+ scan_option(save(s));
+
+#define isoptstring(s) (((s)[0] == '-' || (s)[0] == '+') && (s)[1] != '\0')
+ while (argc > 0 && (isoptstring(*argv) || isoptpending()))
+ {
+ s = *argv++;
+ argc--;
+ if (strcmp(s, "--") == 0)
+ break;
+ scan_option(s);
+ }
+#undef isoptstring
+
+ if (isoptpending())
+ {
+ /*
+ * Last command line option was a flag requiring a
+ * following string, but there was no following string.
+ */
+ nopendopt();
+ quit(QUIT_OK);
+ }
+
+#if EDITOR
+ editor = lgetenv("VISUAL");
+ if (editor == NULL || *editor == '\0')
+ {
+ editor = lgetenv("EDITOR");
+ if (editor == NULL || *editor == '\0')
+ editor = EDIT_PGM;
+ }
+ editproto = lgetenv("LESSEDIT");
+ if (editproto == NULL || *editproto == '\0')
+ editproto = "%E ?lm+%lm. %f";
+#endif
+
+ /*
+ * Call get_ifile with all the command line filenames
+ * to "register" them with the ifile system.
+ */
+ ifile = NULL_IFILE;
+ if (dohelp)
+ ifile = get_ifile(FAKE_HELPFILE, ifile);
+ while (argc-- > 0)
+ {
+ char *filename;
+#if (MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC)
+ /*
+ * Because the "shell" doesn't expand filename patterns,
+ * treat each argument as a filename pattern rather than
+ * a single filename.
+ * Expand the pattern and iterate over the expanded list.
+ */
+ struct textlist tlist;
+ char *gfilename;
+
+ gfilename = lglob(*argv++);
+ init_textlist(&tlist, gfilename);
+ filename = NULL;
+ while ((filename = forw_textlist(&tlist, filename)) != NULL)
+ {
+ (void) get_ifile(filename, ifile);
+ ifile = prev_ifile(NULL_IFILE);
+ }
+ free(gfilename);
+#else
+ filename = shell_quote(*argv);
+ if (filename == NULL)
+ filename = *argv;
+ argv++;
+ (void) get_ifile(filename, ifile);
+ ifile = prev_ifile(NULL_IFILE);
+ free(filename);
+#endif
+ }
+ /*
+ * Set up terminal, etc.
+ */
+ if (!is_tty)
+ {
+ /*
+ * Output is not a tty.
+ * Just copy the input file(s) to output.
+ */
+ SET_BINARY(1);
+ if (nifile() == 0)
+ {
+ if (edit_stdin() == 0)
+ cat_file();
+ } else if (edit_first() == 0)
+ {
+ do {
+ cat_file();
+ } while (edit_next(1) == 0);
+ }
+ quit(QUIT_OK);
+ }
+
+ if (missing_cap && !know_dumb)
+ error("WARNING: terminal is not fully functional", NULL_PARG);
+ init_mark();
+ open_getchr();
+ raw_mode(1);
+ init_signals(1);
+
+ /*
+ * Select the first file to examine.
+ */
+#if TAGS
+ if (tagoption != NULL || strcmp(tags, "-") == 0)
+ {
+ /*
+ * A -t option was given.
+ * Verify that no filenames were also given.
+ * Edit the file selected by the "tags" search,
+ * and search for the proper line in the file.
+ */
+ if (nifile() > 0)
+ {
+ error("No filenames allowed with -t option", NULL_PARG);
+ quit(QUIT_ERROR);
+ }
+ findtag(tagoption);
+ if (edit_tagfile()) /* Edit file which contains the tag */
+ quit(QUIT_ERROR);
+ /*
+ * Search for the line which contains the tag.
+ * Set up initial_scrpos so we display that line.
+ */
+ initial_scrpos.pos = tagsearch();
+ if (initial_scrpos.pos == NULL_POSITION)
+ quit(QUIT_ERROR);
+ initial_scrpos.ln = jump_sline;
+ } else
+#endif
+ if (nifile() == 0)
+ {
+ if (edit_stdin()) /* Edit standard input */
+ quit(QUIT_ERROR);
+ } else
+ {
+ if (edit_first()) /* Edit first valid file in cmd line */
+ quit(QUIT_ERROR);
+ }
+
+ init();
+ commands();
+ quit(QUIT_OK);
+ /*NOTREACHED*/
+ return (0);
+}
+
+/*
+ * Copy a string to a "safe" place
+ * (that is, to a buffer allocated by calloc).
+ */
+ public char *
+save(s)
+ char *s;
+{
+ register char *p;
+
+ p = (char *) ecalloc(strlen(s)+1, sizeof(char));
+ strcpy(p, s);
+ return (p);
+}
+
+/*
+ * Allocate memory.
+ * Like calloc(), but never returns an error (NULL).
+ */
+ public VOID_POINTER
+ecalloc(count, size)
+ int count;
+ unsigned int size;
+{
+ register VOID_POINTER p;
+
+ p = (VOID_POINTER) calloc(count, size);
+ if (p != NULL)
+ return (p);
+ error("Cannot allocate memory", NULL_PARG);
+ quit(QUIT_ERROR);
+ /*NOTREACHED*/
+ return (NULL);
+}
+
+/*
+ * Skip leading spaces in a string.
+ */
+ public char *
+skipsp(s)
+ register char *s;
+{
+ while (*s == ' ' || *s == '\t')
+ s++;
+ return (s);
+}
+
+/*
+ * See how many characters of two strings are identical.
+ * If uppercase is true, the first string must begin with an uppercase
+ * character; the remainder of the first string may be either case.
+ */
+ public int
+sprefix(ps, s, uppercase)
+ char *ps;
+ char *s;
+ int uppercase;
+{
+ register int c;
+ register int sc;
+ register int len = 0;
+
+ for ( ; *s != '\0'; s++, ps++)
+ {
+ c = *ps;
+ if (uppercase)
+ {
+ if (len == 0 && ASCII_IS_LOWER(c))
+ return (-1);
+ if (ASCII_IS_UPPER(c))
+ c = ASCII_TO_LOWER(c);
+ }
+ sc = *s;
+ if (len > 0 && ASCII_IS_UPPER(sc))
+ sc = ASCII_TO_LOWER(sc);
+ if (c != sc)
+ break;
+ len++;
+ }
+ return (len);
+}
+
+/*
+ * Exit the program.
+ */
+ public void
+quit(status)
+ int status;
+{
+ static int save_status;
+
+ /*
+ * Put cursor at bottom left corner, clear the line,
+ * reset the terminal modes, and exit.
+ */
+ if (status < 0)
+ status = save_status;
+ else
+ save_status = status;
+ quitting = 1;
+ edit((char*)NULL);
+ save_cmdhist();
+ if (any_display && is_tty)
+ clear_bot();
+ deinit();
+ flush();
+ raw_mode(0);
+#if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC
+ /*
+ * If we don't close 2, we get some garbage from
+ * 2's buffer when it flushes automatically.
+ * I cannot track this one down RB
+ * The same bug shows up if we use ^C^C to abort.
+ */
+ close(2);
+#endif
+#ifdef WIN32
+ SetConsoleTitle(consoleTitle);
+#endif
+ close_getchr();
+ exit(status);
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+#include "less.h"
+
+extern IFILE curr_ifile;
+extern int sc_height;
+extern int jump_sline;
+
+/*
+ * The table of marks.
+ * Each mark is identified by a lowercase or uppercase letter.
+ * The final one is lmark, for the "last mark"; addressed by the apostrophe.
+ */
+#define NMARKS ((2*26)+1) /* a-z, A-Z, lastmark */
+#define LASTMARK (NMARKS-1)
+static struct mark marks[NMARKS];
+
+/*
+ * Initialize the mark table to show no marks are set.
+ */
+ public void
+init_mark()
+{
+ int i;
+
+ for (i = 0; i < NMARKS; i++)
+ marks[i].m_scrpos.pos = NULL_POSITION;
+}
+
+/*
+ * See if a mark letter is valid (between a and z).
+ */
+ static struct mark *
+getumark(c)
+ int c;
+{
+ if (c >= 'a' && c <= 'z')
+ return (&marks[c-'a']);
+
+ if (c >= 'A' && c <= 'Z')
+ return (&marks[c-'A'+26]);
+
+ error("Invalid mark letter", NULL_PARG);
+ return (NULL);
+}
+
+/*
+ * Get the mark structure identified by a character.
+ * The mark struct may come either from the mark table
+ * or may be constructed on the fly for certain characters like ^, $.
+ */
+ static struct mark *
+getmark(c)
+ int c;
+{
+ register struct mark *m;
+ static struct mark sm;
+
+ switch (c)
+ {
+ case '^':
+ /*
+ * Beginning of the current file.
+ */
+ m = &sm;
+ m->m_scrpos.pos = ch_zero();
+ m->m_scrpos.ln = 0;
+ m->m_ifile = curr_ifile;
+ break;
+ case '$':
+ /*
+ * End of the current file.
+ */
+ if (ch_end_seek())
+ {
+ error("Cannot seek to end of file", NULL_PARG);
+ return (NULL);
+ }
+ m = &sm;
+ m->m_scrpos.pos = ch_tell();
+ m->m_scrpos.ln = sc_height-1;
+ m->m_ifile = curr_ifile;
+ break;
+ case '.':
+ /*
+ * Current position in the current file.
+ */
+ m = &sm;
+ get_scrpos(&m->m_scrpos);
+ m->m_ifile = curr_ifile;
+ break;
+ case '\'':
+ /*
+ * The "last mark".
+ */
+ m = &marks[LASTMARK];
+ break;
+ default:
+ /*
+ * Must be a user-defined mark.
+ */
+ m = getumark(c);
+ if (m == NULL)
+ break;
+ if (m->m_scrpos.pos == NULL_POSITION)
+ {
+ error("Mark not set", NULL_PARG);
+ return (NULL);
+ }
+ break;
+ }
+ return (m);
+}
+
+/*
+ * Is a mark letter is invalid?
+ */
+ public int
+badmark(c)
+ int c;
+{
+ return (getmark(c) == NULL);
+}
+
+/*
+ * Set a user-defined mark.
+ */
+ public void
+setmark(c)
+ int c;
+{
+ register struct mark *m;
+ struct scrpos scrpos;
+
+ m = getumark(c);
+ if (m == NULL)
+ return;
+ get_scrpos(&scrpos);
+ m->m_scrpos = scrpos;
+ m->m_ifile = curr_ifile;
+}
+
+/*
+ * Set lmark (the mark named by the apostrophe).
+ */
+ public void
+lastmark()
+{
+ struct scrpos scrpos;
+
+ if (ch_getflags() & CH_HELPFILE)
+ return;
+ get_scrpos(&scrpos);
+ if (scrpos.pos == NULL_POSITION)
+ return;
+ marks[LASTMARK].m_scrpos = scrpos;
+ marks[LASTMARK].m_ifile = curr_ifile;
+}
+
+/*
+ * Go to a mark.
+ */
+ public void
+gomark(c)
+ int c;
+{
+ register struct mark *m;
+ struct scrpos scrpos;
+
+ m = getmark(c);
+ if (m == NULL)
+ return;
+
+ /*
+ * If we're trying to go to the lastmark and
+ * it has not been set to anything yet,
+ * set it to the beginning of the current file.
+ */
+ if (m == &marks[LASTMARK] && m->m_scrpos.pos == NULL_POSITION)
+ {
+ m->m_ifile = curr_ifile;
+ m->m_scrpos.pos = ch_zero();
+ m->m_scrpos.ln = jump_sline;
+ }
+
+ /*
+ * If we're using lmark, we must save the screen position now,
+ * because if we call edit_ifile() below, lmark will change.
+ * (We save the screen position even if we're not using lmark.)
+ */
+ scrpos = m->m_scrpos;
+ if (m->m_ifile != curr_ifile)
+ {
+ /*
+ * Not in the current file; edit the correct file.
+ */
+ if (edit_ifile(m->m_ifile))
+ return;
+ }
+
+ jump_loc(scrpos.pos, scrpos.ln);
+}
+
+/*
+ * Return the position associated with a given mark letter.
+ *
+ * We don't return which screen line the position
+ * is associated with, but this doesn't matter much,
+ * because it's always the first non-blank line on the screen.
+ */
+ public POSITION
+markpos(c)
+ int c;
+{
+ register struct mark *m;
+
+ m = getmark(c);
+ if (m == NULL)
+ return (NULL_POSITION);
+
+ if (m->m_ifile != curr_ifile)
+ {
+ error("Mark not in current file", NULL_PARG);
+ return (NULL_POSITION);
+ }
+ return (m->m_scrpos.pos);
+}
+
+/*
+ * Clear the marks associated with a specified ifile.
+ */
+ public void
+unmark(ifile)
+ IFILE ifile;
+{
+ int i;
+
+ for (i = 0; i < NMARKS; i++)
+ if (marks[i].m_ifile == ifile)
+ marks[i].m_scrpos.pos = NULL_POSITION;
+}
--- /dev/null
+BEGIN { FS="("; state = 0 }
+
+/^ public/ { ftype = $0; state = 1 }
+
+{ if (state == 1)
+ state = 2
+ else if (state == 2)
+ { print ftype,$1,"();"; state = 0 }
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Silly little program to generate the help.c source file
+ * from the less.hlp text file.
+ * help.c just contains a char array whose contents are
+ * the contents of less.hlp.
+ */
+
+#include <stdio.h>
+
+ int
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ int ch;
+ int prevch;
+
+ printf("/* This file was generated by mkhelp from less.hlp */\n");
+ printf("#include \"less.h\"\n");
+ printf("constant char helpdata[] = {\n");
+ ch = 0;
+ while (prevch = ch, (ch = getchar()) != EOF)
+ {
+ switch (ch)
+ {
+ case '\'':
+ printf("'\\'',");
+ break;
+ case '\\':
+ printf("'\\\\',");
+ break;
+ case '\b':
+ printf("'\\b',");
+ break;
+ case '\t':
+ printf("'\\t',");
+ break;
+ case '\n':
+ if (prevch != '\r')
+ printf("'\\n',\n");
+ break;
+ case '\r':
+ if (prevch != '\n')
+ printf("'\\n',\n");
+ break;
+ default:
+ if (ch >= ' ' && ch < 0x7f)
+ printf("'%c',", ch);
+ else
+ printf("0x%02x,", ch);
+ break;
+ }
+ }
+ /* Add an extra null char to avoid having a trailing comma. */
+ printf(" 0 };\n");
+ printf("constant int size_helpdata = sizeof(helpdata) - 1;\n");
+ return (0);
+}
--- /dev/null
+#!/bin/sh
+# mkinstalldirs --- make directory hierarchy
+# Author: Noah Friedman <friedman@prep.ai.mit.edu>
+# Created: 1993-05-16
+# Last modified: 1994-03-25
+# Public domain
+
+errstatus=0
+
+for file in ${1+"$@"} ; do
+ set fnord `echo ":$file" | sed -ne 's/^:\//#/;s/^://;s/\// /g;s/^#/\//;p'`
+ shift
+
+ pathcomp=
+ for d in ${1+"$@"} ; do
+ pathcomp="$pathcomp$d"
+ case "$pathcomp" in
+ -* ) pathcomp=./$pathcomp ;;
+ esac
+
+ if test ! -d "$pathcomp"; then
+ echo "mkdir $pathcomp" 1>&2
+ mkdir "$pathcomp" || errstatus=$?
+ fi
+
+ pathcomp="$pathcomp/"
+ done
+done
+
+exit $errstatus
+
+# mkinstalldirs ends here
--- /dev/null
+#! /usr/bin/perl
+use strict;
+
+my $USAGE = <<__EOF__;
+ usage: mkutable [-n] [-f#] type... [--] [<] UnicodeData.txt
+ -n = take non-matching types
+ -f = zero-based type field (default 2)
+__EOF__
+
+use vars qw( $opt_f $opt_n );
+use Getopt::Std;
+my $type_field = 2;
+
+exit (main() ? 1 : 0);
+
+sub main {
+ my $date = `date`;
+ chomp $date;
+ my $args = join ' ', @ARGV;
+ my $header = "/* Generated by \"$0 $args\" on $date */\n";
+
+ die $USAGE if not getopts('f:n');
+ $type_field = $opt_f if $opt_f;
+ my %types;
+ my $arg;
+ while ($arg = shift @ARGV) {
+ last if $arg eq '--';
+ $types{$arg} = 1;
+ }
+ my %out = ( 'types' => \%types );
+ my $last_code = 0;
+
+ print $header;
+ while (<>) {
+ chomp;
+ s/#.*//;
+ my @fields = split /;/;
+ next if not @fields;
+ my $code = hex $fields[0];
+ my $type = $fields[$type_field];
+ $type =~ s/\s//g;
+ while (++$last_code < $code) {
+ output(\%out, $last_code, '?');
+ }
+ output(\%out, $code, $type);
+ }
+ output(\%out, $last_code+1, '?');
+}
+
+sub output {
+ my ($out, $code, $type) = @_;
+ my $match = ${${$out}{types}}{$type};
+ my $type_change = (not $$out{start_type} or $type ne $$out{start_type});
+ $match = not $match if $opt_n;
+ if ($match and (not $$out{in_run} or $type_change)) {
+ end_run($out, $code-1);
+ start_run($out, $code, $type);
+ } elsif (not $match and $$out{in_run}) {
+ end_run($out, $code-1);
+ }
+}
+
+sub start_run {
+ my ($out, $code, $type) = @_;
+ $$out{start_code} = $code;
+ $$out{start_type} = $type;
+ $$out{in_run} = 1;
+}
+
+sub end_run {
+ my ($out, $code) = @_;
+ return if not $$out{in_run};
+ printf "\t{ 0x%04x, 0x%04x }, /* %s */\n", $$out{start_code}, $code, $$out{start_type};
+ $$out{in_run} = 0;
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Handling functions for command line options.
+ *
+ * Most options are handled by the generic code in option.c.
+ * But all string options, and a few non-string options, require
+ * special handling specific to the particular option.
+ * This special processing is done by the "handling functions" in this file.
+ *
+ * Each handling function is passed a "type" and, if it is a string
+ * option, the string which should be "assigned" to the option.
+ * The type may be one of:
+ * INIT The option is being initialized from the command line.
+ * TOGGLE The option is being changed from within the program.
+ * QUERY The setting of the option is merely being queried.
+ */
+
+#include "less.h"
+#include "option.h"
+
+extern int nbufs;
+extern int bufspace;
+extern int pr_type;
+extern int plusoption;
+extern int swindow;
+extern int sc_width;
+extern int sc_height;
+extern int secure;
+extern int dohelp;
+extern int any_display;
+extern char openquote;
+extern char closequote;
+extern char *prproto[];
+extern char *eqproto;
+extern char *hproto;
+extern char *wproto;
+extern char *every_first_cmd;
+extern IFILE curr_ifile;
+extern char version[];
+extern int jump_sline;
+extern int jump_sline_fraction;
+extern int shift_count;
+extern int shift_count_fraction;
+extern int less_is_more;
+#if LOGFILE
+extern char *namelogfile;
+extern int force_logfile;
+extern int logfile;
+#endif
+#if TAGS
+public char *tagoption = NULL;
+extern char *tags;
+extern char ztags[];
+#endif
+#if MSDOS_COMPILER
+extern int nm_fg_color, nm_bg_color;
+extern int bo_fg_color, bo_bg_color;
+extern int ul_fg_color, ul_bg_color;
+extern int so_fg_color, so_bg_color;
+extern int bl_fg_color, bl_bg_color;
+#endif
+
+
+#if LOGFILE
+/*
+ * Handler for -o option.
+ */
+ public void
+opt_o(type, s)
+ int type;
+ char *s;
+{
+ PARG parg;
+
+ if (secure)
+ {
+ error("log file support is not available", NULL_PARG);
+ return;
+ }
+ switch (type)
+ {
+ case INIT:
+ namelogfile = save(s);
+ break;
+ case TOGGLE:
+ if (ch_getflags() & CH_CANSEEK)
+ {
+ error("Input is not a pipe", NULL_PARG);
+ return;
+ }
+ if (logfile >= 0)
+ {
+ error("Log file is already in use", NULL_PARG);
+ return;
+ }
+ s = skipsp(s);
+ if (namelogfile != NULL)
+ free(namelogfile);
+ namelogfile = lglob(s);
+ use_logfile(namelogfile);
+ sync_logfile();
+ break;
+ case QUERY:
+ if (logfile < 0)
+ error("No log file", NULL_PARG);
+ else
+ {
+ parg.p_string = namelogfile;
+ error("Log file \"%s\"", &parg);
+ }
+ break;
+ }
+}
+
+/*
+ * Handler for -O option.
+ */
+ public void
+opt__O(type, s)
+ int type;
+ char *s;
+{
+ force_logfile = TRUE;
+ opt_o(type, s);
+}
+#endif
+
+/*
+ * Handlers for -j option.
+ */
+ public void
+opt_j(type, s)
+ int type;
+ char *s;
+{
+ PARG parg;
+ char buf[16];
+ int len;
+ int err;
+
+ switch (type)
+ {
+ case INIT:
+ case TOGGLE:
+ if (*s == '.')
+ {
+ s++;
+ jump_sline_fraction = getfraction(&s, "j", &err);
+ if (err)
+ error("Invalid line fraction", NULL_PARG);
+ else
+ calc_jump_sline();
+ } else
+ {
+ int sline = getnum(&s, "j", &err);
+ if (err)
+ error("Invalid line number", NULL_PARG);
+ else
+ {
+ jump_sline = sline;
+ jump_sline_fraction = -1;
+ }
+ }
+ break;
+ case QUERY:
+ if (jump_sline_fraction < 0)
+ {
+ parg.p_int = jump_sline;
+ error("Position target at screen line %d", &parg);
+ } else
+ {
+
+ sprintf(buf, ".%06d", jump_sline_fraction);
+ len = (int) strlen(buf);
+ while (len > 2 && buf[len-1] == '0')
+ len--;
+ buf[len] = '\0';
+ parg.p_string = buf;
+ error("Position target at screen position %s", &parg);
+ }
+ break;
+ }
+}
+
+ public void
+calc_jump_sline()
+{
+ if (jump_sline_fraction < 0)
+ return;
+ jump_sline = sc_height * jump_sline_fraction / NUM_FRAC_DENOM;
+}
+
+/*
+ * Handlers for -# option.
+ */
+ public void
+opt_shift(type, s)
+ int type;
+ char *s;
+{
+ PARG parg;
+ char buf[16];
+ int len;
+ int err;
+
+ switch (type)
+ {
+ case INIT:
+ case TOGGLE:
+ if (*s == '.')
+ {
+ s++;
+ shift_count_fraction = getfraction(&s, "#", &err);
+ if (err)
+ error("Invalid column fraction", NULL_PARG);
+ else
+ calc_shift_count();
+ } else
+ {
+ int hs = getnum(&s, "#", &err);
+ if (err)
+ error("Invalid column number", NULL_PARG);
+ else
+ {
+ shift_count = hs;
+ shift_count_fraction = -1;
+ }
+ }
+ break;
+ case QUERY:
+ if (shift_count_fraction < 0)
+ {
+ parg.p_int = shift_count;
+ error("Horizontal shift %d columns", &parg);
+ } else
+ {
+
+ sprintf(buf, ".%06d", shift_count_fraction);
+ len = (int) strlen(buf);
+ while (len > 2 && buf[len-1] == '0')
+ len--;
+ buf[len] = '\0';
+ parg.p_string = buf;
+ error("Horizontal shift %s of screen width", &parg);
+ }
+ break;
+ }
+}
+ public void
+calc_shift_count()
+{
+ if (shift_count_fraction < 0)
+ return;
+ shift_count = sc_width * shift_count_fraction / NUM_FRAC_DENOM;
+}
+
+#if USERFILE
+ public void
+opt_k(type, s)
+ int type;
+ char *s;
+{
+ PARG parg;
+
+ switch (type)
+ {
+ case INIT:
+ if (lesskey(s, 0))
+ {
+ parg.p_string = s;
+ error("Cannot use lesskey file \"%s\"", &parg);
+ }
+ break;
+ }
+}
+#endif
+
+#if TAGS
+/*
+ * Handler for -t option.
+ */
+ public void
+opt_t(type, s)
+ int type;
+ char *s;
+{
+ IFILE save_ifile;
+ POSITION pos;
+
+ switch (type)
+ {
+ case INIT:
+ tagoption = save(s);
+ /* Do the rest in main() */
+ break;
+ case TOGGLE:
+ if (secure)
+ {
+ error("tags support is not available", NULL_PARG);
+ break;
+ }
+ findtag(skipsp(s));
+ save_ifile = save_curr_ifile();
+ /*
+ * Try to open the file containing the tag
+ * and search for the tag in that file.
+ */
+ if (edit_tagfile() || (pos = tagsearch()) == NULL_POSITION)
+ {
+ /* Failed: reopen the old file. */
+ reedit_ifile(save_ifile);
+ break;
+ }
+ unsave_ifile(save_ifile);
+ jump_loc(pos, jump_sline);
+ break;
+ }
+}
+
+/*
+ * Handler for -T option.
+ */
+ public void
+opt__T(type, s)
+ int type;
+ char *s;
+{
+ PARG parg;
+
+ switch (type)
+ {
+ case INIT:
+ tags = save(s);
+ break;
+ case TOGGLE:
+ s = skipsp(s);
+ if (tags != NULL && tags != ztags)
+ free(tags);
+ tags = lglob(s);
+ break;
+ case QUERY:
+ parg.p_string = tags;
+ error("Tags file \"%s\"", &parg);
+ break;
+ }
+}
+#endif
+
+/*
+ * Handler for -p option.
+ */
+ public void
+opt_p(type, s)
+ int type;
+ register char *s;
+{
+ switch (type)
+ {
+ case INIT:
+ /*
+ * Unget a command for the specified string.
+ */
+ if (less_is_more)
+ {
+ /*
+ * In "more" mode, the -p argument is a command,
+ * not a search string, so we don't need a slash.
+ */
+ every_first_cmd = save(s);
+ } else
+ {
+ plusoption = TRUE;
+ ungetcc(CHAR_END_COMMAND);
+ ungetsc(s);
+ /*
+ * {{ This won't work if the "/" command is
+ * changed or invalidated by a .lesskey file. }}
+ */
+ ungetsc("/");
+ }
+ break;
+ }
+}
+
+/*
+ * Handler for -P option.
+ */
+ public void
+opt__P(type, s)
+ int type;
+ register char *s;
+{
+ register char **proto;
+ PARG parg;
+
+ switch (type)
+ {
+ case INIT:
+ case TOGGLE:
+ /*
+ * Figure out which prototype string should be changed.
+ */
+ switch (*s)
+ {
+ case 's': proto = &prproto[PR_SHORT]; s++; break;
+ case 'm': proto = &prproto[PR_MEDIUM]; s++; break;
+ case 'M': proto = &prproto[PR_LONG]; s++; break;
+ case '=': proto = &eqproto; s++; break;
+ case 'h': proto = &hproto; s++; break;
+ case 'w': proto = &wproto; s++; break;
+ default: proto = &prproto[PR_SHORT]; break;
+ }
+ free(*proto);
+ *proto = save(s);
+ break;
+ case QUERY:
+ parg.p_string = prproto[pr_type];
+ error("%s", &parg);
+ break;
+ }
+}
+
+/*
+ * Handler for the -b option.
+ */
+ /*ARGSUSED*/
+ public void
+opt_b(type, s)
+ int type;
+ char *s;
+{
+ switch (type)
+ {
+ case INIT:
+ case TOGGLE:
+ /*
+ * Set the new number of buffers.
+ */
+ ch_setbufspace(bufspace);
+ break;
+ case QUERY:
+ break;
+ }
+}
+
+/*
+ * Handler for the -i option.
+ */
+ /*ARGSUSED*/
+ public void
+opt_i(type, s)
+ int type;
+ char *s;
+{
+ switch (type)
+ {
+ case TOGGLE:
+ chg_caseless();
+ break;
+ case QUERY:
+ case INIT:
+ break;
+ }
+}
+
+/*
+ * Handler for the -V option.
+ */
+ /*ARGSUSED*/
+ public void
+opt__V(type, s)
+ int type;
+ char *s;
+{
+ switch (type)
+ {
+ case TOGGLE:
+ case QUERY:
+ dispversion();
+ break;
+ case INIT:
+ /*
+ * Force output to stdout per GNU standard for --version output.
+ */
+ any_display = 1;
+ putstr("less ");
+ putstr(version);
+ putstr(" (");
+#if HAVE_GNU_REGEX
+ putstr("GNU ");
+#endif
+#if HAVE_POSIX_REGCOMP
+ putstr("POSIX ");
+#endif
+#if HAVE_PCRE
+ putstr("PCRE ");
+#endif
+#if HAVE_RE_COMP
+ putstr("BSD ");
+#endif
+#if HAVE_REGCMP
+ putstr("V8 ");
+#endif
+#if HAVE_V8_REGCOMP
+ putstr("Spencer V8 ");
+#endif
+#if !HAVE_GNU_REGEX && !HAVE_POSIX_REGCOMP && !HAVE_PCRE && !HAVE_RE_COMP && !HAVE_REGCMP && !HAVE_V8_REGCOMP
+ putstr("no ");
+#endif
+ putstr("regular expressions)\n");
+ putstr("Copyright (C) 1984-2015 Mark Nudelman\n\n");
+ putstr("less comes with NO WARRANTY, to the extent permitted by law.\n");
+ putstr("For information about the terms of redistribution,\n");
+ putstr("see the file named README in the less distribution.\n");
+ putstr("Homepage: http://www.greenwoodsoftware.com/less\n");
+ quit(QUIT_OK);
+ break;
+ }
+}
+
+#if MSDOS_COMPILER
+/*
+ * Parse an MSDOS color descriptor.
+ */
+ static void
+colordesc(s, fg_color, bg_color)
+ char *s;
+ int *fg_color;
+ int *bg_color;
+{
+ int fg, bg;
+ int err;
+
+ fg = getnum(&s, "D", &err);
+ if (err)
+ {
+ error("Missing fg color in -D", NULL_PARG);
+ return;
+ }
+ if (*s != '.')
+ bg = nm_bg_color;
+ else
+ {
+ s++;
+ bg = getnum(&s, "D", &err);
+ if (err)
+ {
+ error("Missing bg color in -D", NULL_PARG);
+ return;
+ }
+ }
+ if (*s != '\0')
+ error("Extra characters at end of -D option", NULL_PARG);
+ *fg_color = fg;
+ *bg_color = bg;
+}
+
+/*
+ * Handler for the -D option.
+ */
+ /*ARGSUSED*/
+ public void
+opt_D(type, s)
+ int type;
+ char *s;
+{
+ switch (type)
+ {
+ case INIT:
+ case TOGGLE:
+ switch (*s++)
+ {
+ case 'n':
+ colordesc(s, &nm_fg_color, &nm_bg_color);
+ break;
+ case 'd':
+ colordesc(s, &bo_fg_color, &bo_bg_color);
+ break;
+ case 'u':
+ colordesc(s, &ul_fg_color, &ul_bg_color);
+ break;
+ case 'k':
+ colordesc(s, &bl_fg_color, &bl_bg_color);
+ break;
+ case 's':
+ colordesc(s, &so_fg_color, &so_bg_color);
+ break;
+ default:
+ error("-D must be followed by n, d, u, k or s", NULL_PARG);
+ break;
+ }
+ if (type == TOGGLE)
+ {
+ at_enter(AT_STANDOUT);
+ at_exit();
+ }
+ break;
+ case QUERY:
+ break;
+ }
+}
+#endif
+
+/*
+ * Handler for the -x option.
+ */
+ public void
+opt_x(type, s)
+ int type;
+ register char *s;
+{
+ extern int tabstops[];
+ extern int ntabstops;
+ extern int tabdefault;
+ char msg[60+(4*TABSTOP_MAX)];
+ int i;
+ PARG p;
+
+ switch (type)
+ {
+ case INIT:
+ case TOGGLE:
+ /* Start at 1 because tabstops[0] is always zero. */
+ for (i = 1; i < TABSTOP_MAX; )
+ {
+ int n = 0;
+ s = skipsp(s);
+ while (*s >= '0' && *s <= '9')
+ n = (10 * n) + (*s++ - '0');
+ if (n > tabstops[i-1])
+ tabstops[i++] = n;
+ s = skipsp(s);
+ if (*s++ != ',')
+ break;
+ }
+ if (i < 2)
+ return;
+ ntabstops = i;
+ tabdefault = tabstops[ntabstops-1] - tabstops[ntabstops-2];
+ break;
+ case QUERY:
+ strcpy(msg, "Tab stops ");
+ if (ntabstops > 2)
+ {
+ for (i = 1; i < ntabstops; i++)
+ {
+ if (i > 1)
+ strcat(msg, ",");
+ sprintf(msg+strlen(msg), "%d", tabstops[i]);
+ }
+ sprintf(msg+strlen(msg), " and then ");
+ }
+ sprintf(msg+strlen(msg), "every %d spaces",
+ tabdefault);
+ p.p_string = msg;
+ error("%s", &p);
+ break;
+ }
+}
+
+
+/*
+ * Handler for the -" option.
+ */
+ public void
+opt_quote(type, s)
+ int type;
+ register char *s;
+{
+ char buf[3];
+ PARG parg;
+
+ switch (type)
+ {
+ case INIT:
+ case TOGGLE:
+ if (s[0] == '\0')
+ {
+ openquote = closequote = '\0';
+ break;
+ }
+ if (s[1] != '\0' && s[2] != '\0')
+ {
+ error("-\" must be followed by 1 or 2 chars", NULL_PARG);
+ return;
+ }
+ openquote = s[0];
+ if (s[1] == '\0')
+ closequote = openquote;
+ else
+ closequote = s[1];
+ break;
+ case QUERY:
+ buf[0] = openquote;
+ buf[1] = closequote;
+ buf[2] = '\0';
+ parg.p_string = buf;
+ error("quotes %s", &parg);
+ break;
+ }
+}
+
+/*
+ * "-?" means display a help message.
+ * If from the command line, exit immediately.
+ */
+ /*ARGSUSED*/
+ public void
+opt_query(type, s)
+ int type;
+ char *s;
+{
+ switch (type)
+ {
+ case QUERY:
+ case TOGGLE:
+ error("Use \"h\" for help", NULL_PARG);
+ break;
+ case INIT:
+ dohelp = 1;
+ }
+}
+
+/*
+ * Get the "screen window" size.
+ */
+ public int
+get_swindow()
+{
+ if (swindow > 0)
+ return (swindow);
+ return (sc_height + swindow);
+}
+
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Process command line options.
+ *
+ * Each option is a single letter which controls a program variable.
+ * The options have defaults which may be changed via
+ * the command line option, toggled via the "-" command,
+ * or queried via the "_" command.
+ */
+
+#include "less.h"
+#include "option.h"
+
+static struct loption *pendopt;
+public int plusoption = FALSE;
+
+static char *optstring();
+static int flip_triple();
+
+extern int screen_trashed;
+extern int less_is_more;
+extern int quit_at_eof;
+extern char *every_first_cmd;
+extern int opt_use_backslash;
+
+/*
+ * Return a printable description of an option.
+ */
+ static char *
+opt_desc(o)
+ struct loption *o;
+{
+ static char buf[OPTNAME_MAX + 10];
+ if (o->oletter == OLETTER_NONE)
+ SNPRINTF1(buf, sizeof(buf), "--%s", o->onames->oname);
+ else
+ SNPRINTF2(buf, sizeof(buf), "-%c (--%s)", o->oletter, o->onames->oname);
+ return (buf);
+}
+
+/*
+ * Return a string suitable for printing as the "name" of an option.
+ * For example, if the option letter is 'x', just return "-x".
+ */
+ public char *
+propt(c)
+ int c;
+{
+ static char buf[8];
+
+ sprintf(buf, "-%s", prchar(c));
+ return (buf);
+}
+
+/*
+ * Scan an argument (either from the command line or from the
+ * LESS environment variable) and process it.
+ */
+ public void
+scan_option(s)
+ char *s;
+{
+ register struct loption *o;
+ register int optc;
+ char *optname;
+ char *printopt;
+ char *str;
+ int set_default;
+ int lc;
+ int err;
+ PARG parg;
+
+ if (s == NULL)
+ return;
+
+ /*
+ * If we have a pending option which requires an argument,
+ * handle it now.
+ * This happens if the previous option was, for example, "-P"
+ * without a following string. In that case, the current
+ * option is simply the argument for the previous option.
+ */
+ if (pendopt != NULL)
+ {
+ switch (pendopt->otype & OTYPE)
+ {
+ case STRING:
+ (*pendopt->ofunc)(INIT, s);
+ break;
+ case NUMBER:
+ printopt = opt_desc(pendopt);
+ *(pendopt->ovar) = getnum(&s, printopt, (int*)NULL);
+ break;
+ }
+ pendopt = NULL;
+ return;
+ }
+
+ set_default = FALSE;
+ optname = NULL;
+
+ while (*s != '\0')
+ {
+ /*
+ * Check some special cases first.
+ */
+ switch (optc = *s++)
+ {
+ case ' ':
+ case '\t':
+ case END_OPTION_STRING:
+ continue;
+ case '-':
+ /*
+ * "--" indicates an option name instead of a letter.
+ */
+ if (*s == '-')
+ {
+ optname = ++s;
+ break;
+ }
+ /*
+ * "-+" means set these options back to their defaults.
+ * (They may have been set otherwise by previous
+ * options.)
+ */
+ set_default = (*s == '+');
+ if (set_default)
+ s++;
+ continue;
+ case '+':
+ /*
+ * An option prefixed by a "+" is ungotten, so
+ * that it is interpreted as less commands
+ * processed at the start of the first input file.
+ * "++" means process the commands at the start of
+ * EVERY input file.
+ */
+ plusoption = TRUE;
+ s = optstring(s, &str, propt('+'), NULL);
+ if (s == NULL)
+ return;
+ if (*str == '+')
+ every_first_cmd = save(str+1);
+ else
+ {
+ ungetcc(CHAR_END_COMMAND);
+ ungetsc(str);
+ }
+ free(str);
+ continue;
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ /*
+ * Special "more" compatibility form "-<number>"
+ * instead of -z<number> to set the scrolling
+ * window size.
+ */
+ s--;
+ optc = 'z';
+ break;
+ case 'n':
+ if (less_is_more)
+ optc = 'z';
+ break;
+ }
+
+ /*
+ * Not a special case.
+ * Look up the option letter in the option table.
+ */
+ err = 0;
+ if (optname == NULL)
+ {
+ printopt = propt(optc);
+ lc = ASCII_IS_LOWER(optc);
+ o = findopt(optc);
+ } else
+ {
+ printopt = optname;
+ lc = ASCII_IS_LOWER(optname[0]);
+ o = findopt_name(&optname, NULL, &err);
+ s = optname;
+ optname = NULL;
+ if (*s == '\0' || *s == ' ')
+ {
+ /*
+ * The option name matches exactly.
+ */
+ ;
+ } else if (*s == '=')
+ {
+ /*
+ * The option name is followed by "=value".
+ */
+ if (o != NULL &&
+ (o->otype & OTYPE) != STRING &&
+ (o->otype & OTYPE) != NUMBER)
+ {
+ parg.p_string = printopt;
+ error("The %s option should not be followed by =",
+ &parg);
+ return;
+ }
+ s++;
+ } else
+ {
+ /*
+ * The specified name is longer than the
+ * real option name.
+ */
+ o = NULL;
+ }
+ }
+ if (o == NULL)
+ {
+ parg.p_string = printopt;
+ if (err == OPT_AMBIG)
+ error("%s is an ambiguous abbreviation (\"less --help\" for help)",
+ &parg);
+ else
+ error("There is no %s option (\"less --help\" for help)",
+ &parg);
+ return;
+ }
+
+ str = NULL;
+ switch (o->otype & OTYPE)
+ {
+ case BOOL:
+ if (set_default)
+ *(o->ovar) = o->odefault;
+ else
+ *(o->ovar) = ! o->odefault;
+ break;
+ case TRIPLE:
+ if (set_default)
+ *(o->ovar) = o->odefault;
+ else
+ *(o->ovar) = flip_triple(o->odefault, lc);
+ break;
+ case STRING:
+ if (*s == '\0')
+ {
+ /*
+ * Set pendopt and return.
+ * We will get the string next time
+ * scan_option is called.
+ */
+ pendopt = o;
+ return;
+ }
+ /*
+ * Don't do anything here.
+ * All processing of STRING options is done by
+ * the handling function.
+ */
+ while (*s == ' ')
+ s++;
+ s = optstring(s, &str, printopt, o->odesc[1]);
+ if (s == NULL)
+ return;
+ break;
+ case NUMBER:
+ if (*s == '\0')
+ {
+ pendopt = o;
+ return;
+ }
+ *(o->ovar) = getnum(&s, printopt, (int*)NULL);
+ break;
+ }
+ /*
+ * If the option has a handling function, call it.
+ */
+ if (o->ofunc != NULL)
+ (*o->ofunc)(INIT, str);
+ if (str != NULL)
+ free(str);
+ }
+}
+
+/*
+ * Toggle command line flags from within the program.
+ * Used by the "-" and "_" commands.
+ * how_toggle may be:
+ * OPT_NO_TOGGLE just report the current setting, without changing it.
+ * OPT_TOGGLE invert the current setting
+ * OPT_UNSET set to the default value
+ * OPT_SET set to the inverse of the default value
+ */
+ public void
+toggle_option(o, lower, s, how_toggle)
+ struct loption *o;
+ int lower;
+ char *s;
+ int how_toggle;
+{
+ register int num;
+ int no_prompt;
+ int err;
+ PARG parg;
+
+ no_prompt = (how_toggle & OPT_NO_PROMPT);
+ how_toggle &= ~OPT_NO_PROMPT;
+
+ if (o == NULL)
+ {
+ error("No such option", NULL_PARG);
+ return;
+ }
+
+ if (how_toggle == OPT_TOGGLE && (o->otype & NO_TOGGLE))
+ {
+ parg.p_string = opt_desc(o);
+ error("Cannot change the %s option", &parg);
+ return;
+ }
+
+ if (how_toggle == OPT_NO_TOGGLE && (o->otype & NO_QUERY))
+ {
+ parg.p_string = opt_desc(o);
+ error("Cannot query the %s option", &parg);
+ return;
+ }
+
+ /*
+ * Check for something which appears to be a do_toggle
+ * (because the "-" command was used), but really is not.
+ * This could be a string option with no string, or
+ * a number option with no number.
+ */
+ switch (o->otype & OTYPE)
+ {
+ case STRING:
+ case NUMBER:
+ if (how_toggle == OPT_TOGGLE && *s == '\0')
+ how_toggle = OPT_NO_TOGGLE;
+ break;
+ }
+
+#if HILITE_SEARCH
+ if (how_toggle != OPT_NO_TOGGLE && (o->otype & HL_REPAINT))
+ repaint_hilite(0);
+#endif
+
+ /*
+ * Now actually toggle (change) the variable.
+ */
+ if (how_toggle != OPT_NO_TOGGLE)
+ {
+ switch (o->otype & OTYPE)
+ {
+ case BOOL:
+ /*
+ * Boolean.
+ */
+ switch (how_toggle)
+ {
+ case OPT_TOGGLE:
+ *(o->ovar) = ! *(o->ovar);
+ break;
+ case OPT_UNSET:
+ *(o->ovar) = o->odefault;
+ break;
+ case OPT_SET:
+ *(o->ovar) = ! o->odefault;
+ break;
+ }
+ break;
+ case TRIPLE:
+ /*
+ * Triple:
+ * If user gave the lower case letter, then switch
+ * to 1 unless already 1, in which case make it 0.
+ * If user gave the upper case letter, then switch
+ * to 2 unless already 2, in which case make it 0.
+ */
+ switch (how_toggle)
+ {
+ case OPT_TOGGLE:
+ *(o->ovar) = flip_triple(*(o->ovar), lower);
+ break;
+ case OPT_UNSET:
+ *(o->ovar) = o->odefault;
+ break;
+ case OPT_SET:
+ *(o->ovar) = flip_triple(o->odefault, lower);
+ break;
+ }
+ break;
+ case STRING:
+ /*
+ * String: don't do anything here.
+ * The handling function will do everything.
+ */
+ switch (how_toggle)
+ {
+ case OPT_SET:
+ case OPT_UNSET:
+ error("Cannot use \"-+\" or \"--\" for a string option",
+ NULL_PARG);
+ return;
+ }
+ break;
+ case NUMBER:
+ /*
+ * Number: set the variable to the given number.
+ */
+ switch (how_toggle)
+ {
+ case OPT_TOGGLE:
+ num = getnum(&s, NULL, &err);
+ if (!err)
+ *(o->ovar) = num;
+ break;
+ case OPT_UNSET:
+ *(o->ovar) = o->odefault;
+ break;
+ case OPT_SET:
+ error("Can't use \"-!\" for a numeric option",
+ NULL_PARG);
+ return;
+ }
+ break;
+ }
+ }
+
+ /*
+ * Call the handling function for any special action
+ * specific to this option.
+ */
+ if (o->ofunc != NULL)
+ (*o->ofunc)((how_toggle==OPT_NO_TOGGLE) ? QUERY : TOGGLE, s);
+
+#if HILITE_SEARCH
+ if (how_toggle != OPT_NO_TOGGLE && (o->otype & HL_REPAINT))
+ chg_hilite();
+#endif
+
+ if (!no_prompt)
+ {
+ /*
+ * Print a message describing the new setting.
+ */
+ switch (o->otype & OTYPE)
+ {
+ case BOOL:
+ case TRIPLE:
+ /*
+ * Print the odesc message.
+ */
+ error(o->odesc[*(o->ovar)], NULL_PARG);
+ break;
+ case NUMBER:
+ /*
+ * The message is in odesc[1] and has a %d for
+ * the value of the variable.
+ */
+ parg.p_int = *(o->ovar);
+ error(o->odesc[1], &parg);
+ break;
+ case STRING:
+ /*
+ * Message was already printed by the handling function.
+ */
+ break;
+ }
+ }
+
+ if (how_toggle != OPT_NO_TOGGLE && (o->otype & REPAINT))
+ screen_trashed = TRUE;
+}
+
+/*
+ * "Toggle" a triple-valued option.
+ */
+ static int
+flip_triple(val, lc)
+ int val;
+ int lc;
+{
+ if (lc)
+ return ((val == OPT_ON) ? OPT_OFF : OPT_ON);
+ else
+ return ((val == OPT_ONPLUS) ? OPT_OFF : OPT_ONPLUS);
+}
+
+/*
+ * Determine if an option takes a parameter.
+ */
+ public int
+opt_has_param(o)
+ struct loption *o;
+{
+ if (o == NULL)
+ return (0);
+ if (o->otype & (BOOL|TRIPLE|NOVAR|NO_TOGGLE))
+ return (0);
+ return (1);
+}
+
+/*
+ * Return the prompt to be used for a given option letter.
+ * Only string and number valued options have prompts.
+ */
+ public char *
+opt_prompt(o)
+ struct loption *o;
+{
+ if (o == NULL || (o->otype & (STRING|NUMBER)) == 0)
+ return ("?");
+ return (o->odesc[0]);
+}
+
+/*
+ * Return whether or not there is a string option pending;
+ * that is, if the previous option was a string-valued option letter
+ * (like -P) without a following string.
+ * In that case, the current option is taken to be the string for
+ * the previous option.
+ */
+ public int
+isoptpending()
+{
+ return (pendopt != NULL);
+}
+
+/*
+ * Print error message about missing string.
+ */
+ static void
+nostring(printopt)
+ char *printopt;
+{
+ PARG parg;
+ parg.p_string = printopt;
+ error("Value is required after %s", &parg);
+}
+
+/*
+ * Print error message if a STRING type option is not followed by a string.
+ */
+ public void
+nopendopt()
+{
+ nostring(opt_desc(pendopt));
+}
+
+/*
+ * Scan to end of string or to an END_OPTION_STRING character.
+ * In the latter case, replace the char with a null char.
+ * Return a pointer to the remainder of the string, if any.
+ */
+ static char *
+optstring(s, p_str, printopt, validchars)
+ char *s;
+ char **p_str;
+ char *printopt;
+ char *validchars;
+{
+ register char *p;
+ register char *out;
+
+ if (*s == '\0')
+ {
+ nostring(printopt);
+ return (NULL);
+ }
+ /* Alloc could be more than needed, but not worth trimming. */
+ *p_str = (char *) ecalloc(strlen(s)+1, sizeof(char));
+ out = *p_str;
+
+ for (p = s; *p != '\0'; p++)
+ {
+ if (opt_use_backslash && *p == '\\' && p[1] != '\0')
+ {
+ /* Take next char literally. */
+ ++p;
+ } else
+ {
+ if (*p == END_OPTION_STRING ||
+ (validchars != NULL && strchr(validchars, *p) == NULL))
+ /* End of option string. */
+ break;
+ }
+ *out++ = *p;
+ }
+ *out = '\0';
+ return (p);
+}
+
+/*
+ */
+ static int
+num_error(printopt, errp)
+ char *printopt;
+ int *errp;
+{
+ PARG parg;
+
+ if (errp != NULL)
+ {
+ *errp = TRUE;
+ return (-1);
+ }
+ if (printopt != NULL)
+ {
+ parg.p_string = printopt;
+ error("Number is required after %s", &parg);
+ }
+ return (-1);
+}
+
+/*
+ * Translate a string into a number.
+ * Like atoi(), but takes a pointer to a char *, and updates
+ * the char * to point after the translated number.
+ */
+ public int
+getnum(sp, printopt, errp)
+ char **sp;
+ char *printopt;
+ int *errp;
+{
+ register char *s;
+ register int n;
+ register int neg;
+
+ s = skipsp(*sp);
+ neg = FALSE;
+ if (*s == '-')
+ {
+ neg = TRUE;
+ s++;
+ }
+ if (*s < '0' || *s > '9')
+ return (num_error(printopt, errp));
+
+ n = 0;
+ while (*s >= '0' && *s <= '9')
+ n = 10 * n + *s++ - '0';
+ *sp = s;
+ if (errp != NULL)
+ *errp = FALSE;
+ if (neg)
+ n = -n;
+ return (n);
+}
+
+/*
+ * Translate a string into a fraction, represented by the part of a
+ * number which would follow a decimal point.
+ * The value of the fraction is returned as parts per NUM_FRAC_DENOM.
+ * That is, if "n" is returned, the fraction intended is n/NUM_FRAC_DENOM.
+ */
+ public long
+getfraction(sp, printopt, errp)
+ char **sp;
+ char *printopt;
+ int *errp;
+{
+ register char *s;
+ long frac = 0;
+ int fraclen = 0;
+
+ s = skipsp(*sp);
+ if (*s < '0' || *s > '9')
+ return (num_error(printopt, errp));
+
+ for ( ; *s >= '0' && *s <= '9'; s++)
+ {
+ frac = (frac * 10) + (*s - '0');
+ fraclen++;
+ }
+ if (fraclen > NUM_LOG_FRAC_DENOM)
+ while (fraclen-- > NUM_LOG_FRAC_DENOM)
+ frac /= 10;
+ else
+ while (fraclen++ < NUM_LOG_FRAC_DENOM)
+ frac *= 10;
+ *sp = s;
+ if (errp != NULL)
+ *errp = FALSE;
+ return (frac);
+}
+
+
+/*
+ * Get the value of the -e flag.
+ */
+ public int
+get_quit_at_eof()
+{
+ if (!less_is_more)
+ return quit_at_eof;
+ /* When less_is_more is set, the -e flag semantics are different. */
+ return quit_at_eof ? OPT_ONPLUS : OPT_ON;
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+#define END_OPTION_STRING ('$')
+
+/*
+ * Types of options.
+ */
+#define BOOL 01 /* Boolean option: 0 or 1 */
+#define TRIPLE 02 /* Triple-valued option: 0, 1 or 2 */
+#define NUMBER 04 /* Numeric option */
+#define STRING 010 /* String-valued option */
+#define NOVAR 020 /* No associated variable */
+#define REPAINT 040 /* Repaint screen after toggling option */
+#define NO_TOGGLE 0100 /* Option cannot be toggled with "-" cmd */
+#define HL_REPAINT 0200 /* Repaint hilites after toggling option */
+#define NO_QUERY 0400 /* Option cannot be queried with "_" cmd */
+#define INIT_HANDLER 01000 /* Call option handler function at startup */
+
+#define OTYPE (BOOL|TRIPLE|NUMBER|STRING|NOVAR)
+
+#define OLETTER_NONE '\1' /* Invalid option letter */
+
+/*
+ * Argument to a handling function tells what type of activity:
+ */
+#define INIT 0 /* Initialization (from command line) */
+#define QUERY 1 /* Query (from _ or - command) */
+#define TOGGLE 2 /* Change value (from - command) */
+
+/* Flag to toggle_option to specify how to "toggle" */
+#define OPT_NO_TOGGLE 0
+#define OPT_TOGGLE 1
+#define OPT_UNSET 2
+#define OPT_SET 3
+#define OPT_NO_PROMPT 0100
+
+/* Error code from findopt_name */
+#define OPT_AMBIG 1
+
+struct optname
+{
+ char *oname; /* Long (GNU-style) option name */
+ struct optname *onext; /* List of synonymous option names */
+};
+
+#define OPTNAME_MAX 32 /* Max length of long option name */
+
+struct loption
+{
+ char oletter; /* The controlling letter (a-z) */
+ struct optname *onames; /* Long (GNU-style) option name */
+ int otype; /* Type of the option */
+ int odefault; /* Default value */
+ int *ovar; /* Pointer to the associated variable */
+ void (*ofunc)(); /* Pointer to special handling function */
+ char *odesc[3]; /* Description of each value */
+};
+
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * The option table.
+ */
+
+#include "less.h"
+#include "option.h"
+
+/*
+ * Variables controlled by command line options.
+ */
+public int quiet; /* Should we suppress the audible bell? */
+public int how_search; /* Where should forward searches start? */
+public int top_scroll; /* Repaint screen from top?
+ (alternative is scroll from bottom) */
+public int pr_type; /* Type of prompt (short, medium, long) */
+public int bs_mode; /* How to process backspaces */
+public int know_dumb; /* Don't complain about dumb terminals */
+public int quit_at_eof; /* Quit after hitting end of file twice */
+public int quit_if_one_screen; /* Quit if EOF on first screen */
+public int squeeze; /* Squeeze multiple blank lines into one */
+public int tabstop; /* Tab settings */
+public int back_scroll; /* Repaint screen on backwards movement */
+public int forw_scroll; /* Repaint screen on forward movement */
+public int caseless; /* Do "caseless" searches */
+public int linenums; /* Use line numbers */
+public int autobuf; /* Automatically allocate buffers as needed */
+public int bufspace; /* Max buffer space per file (K) */
+public int ctldisp; /* Send control chars to screen untranslated */
+public int force_open; /* Open the file even if not regular file */
+public int swindow; /* Size of scrolling window */
+public int jump_sline; /* Screen line of "jump target" */
+public long jump_sline_fraction = -1;
+public long shift_count_fraction = -1;
+public int chopline; /* Truncate displayed lines at screen width */
+public int no_init; /* Disable sending ti/te termcap strings */
+public int no_keypad; /* Disable sending ks/ke termcap strings */
+public int twiddle; /* Show tildes after EOF */
+public int show_attn; /* Hilite first unread line */
+public int shift_count; /* Number of positions to shift horizontally */
+public int status_col; /* Display a status column */
+public int use_lessopen; /* Use the LESSOPEN filter */
+public int quit_on_intr; /* Quit on interrupt */
+public int follow_mode; /* F cmd Follows file desc or file name? */
+public int oldbot; /* Old bottom of screen behavior {{REMOVE}} */
+public int opt_use_backslash; /* Use backslash escaping in option parsing */
+#if HILITE_SEARCH
+public int hilite_search; /* Highlight matched search patterns? */
+#endif
+
+public int less_is_more = 0; /* Make compatible with POSIX more */
+
+/*
+ * Long option names.
+ */
+static struct optname a_optname = { "search-skip-screen", NULL };
+static struct optname b_optname = { "buffers", NULL };
+static struct optname B__optname = { "auto-buffers", NULL };
+static struct optname c_optname = { "clear-screen", NULL };
+static struct optname d_optname = { "dumb", NULL };
+#if MSDOS_COMPILER
+static struct optname D__optname = { "color", NULL };
+#endif
+static struct optname e_optname = { "quit-at-eof", NULL };
+static struct optname f_optname = { "force", NULL };
+static struct optname F__optname = { "quit-if-one-screen", NULL };
+#if HILITE_SEARCH
+static struct optname g_optname = { "hilite-search", NULL };
+#endif
+static struct optname h_optname = { "max-back-scroll", NULL };
+static struct optname i_optname = { "ignore-case", NULL };
+static struct optname j_optname = { "jump-target", NULL };
+static struct optname J__optname = { "status-column", NULL };
+#if USERFILE
+static struct optname k_optname = { "lesskey-file", NULL };
+#endif
+static struct optname K__optname = { "quit-on-intr", NULL };
+static struct optname L__optname = { "no-lessopen", NULL };
+static struct optname m_optname = { "long-prompt", NULL };
+static struct optname n_optname = { "line-numbers", NULL };
+#if LOGFILE
+static struct optname o_optname = { "log-file", NULL };
+static struct optname O__optname = { "LOG-FILE", NULL };
+#endif
+static struct optname p_optname = { "pattern", NULL };
+static struct optname P__optname = { "prompt", NULL };
+static struct optname q2_optname = { "silent", NULL };
+static struct optname q_optname = { "quiet", &q2_optname };
+static struct optname r_optname = { "raw-control-chars", NULL };
+static struct optname s_optname = { "squeeze-blank-lines", NULL };
+static struct optname S__optname = { "chop-long-lines", NULL };
+#if TAGS
+static struct optname t_optname = { "tag", NULL };
+static struct optname T__optname = { "tag-file", NULL };
+#endif
+static struct optname u_optname = { "underline-special", NULL };
+static struct optname V__optname = { "version", NULL };
+static struct optname w_optname = { "hilite-unread", NULL };
+static struct optname x_optname = { "tabs", NULL };
+static struct optname X__optname = { "no-init", NULL };
+static struct optname y_optname = { "max-forw-scroll", NULL };
+static struct optname z_optname = { "window", NULL };
+static struct optname quote_optname = { "quotes", NULL };
+static struct optname tilde_optname = { "tilde", NULL };
+static struct optname query_optname = { "help", NULL };
+static struct optname pound_optname = { "shift", NULL };
+static struct optname keypad_optname = { "no-keypad", NULL };
+static struct optname oldbot_optname = { "old-bot", NULL };
+static struct optname follow_optname = { "follow-name", NULL };
+static struct optname use_backslash_optname = { "use-backslash", NULL };
+
+
+/*
+ * Table of all options and their semantics.
+ *
+ * For BOOL and TRIPLE options, odesc[0], odesc[1], odesc[2] are
+ * the description of the option when set to 0, 1 or 2, respectively.
+ * For NUMBER options, odesc[0] is the prompt to use when entering
+ * a new value, and odesc[1] is the description, which should contain
+ * one %d which is replaced by the value of the number.
+ * For STRING options, odesc[0] is the prompt to use when entering
+ * a new value, and odesc[1], if not NULL, is the set of characters
+ * that are valid in the string.
+ */
+static struct loption option[] =
+{
+ { 'a', &a_optname,
+ TRIPLE, OPT_ONPLUS, &how_search, NULL,
+ {
+ "Search includes displayed screen",
+ "Search skips displayed screen",
+ "Search includes all of displayed screen"
+ }
+ },
+
+ { 'b', &b_optname,
+ NUMBER|INIT_HANDLER, 64, &bufspace, opt_b,
+ {
+ "Max buffer space per file (K): ",
+ "Max buffer space per file: %dK",
+ NULL
+ }
+ },
+ { 'B', &B__optname,
+ BOOL, OPT_ON, &autobuf, NULL,
+ {
+ "Don't automatically allocate buffers",
+ "Automatically allocate buffers when needed",
+ NULL
+ }
+ },
+ { 'c', &c_optname,
+ TRIPLE, OPT_OFF, &top_scroll, NULL,
+ {
+ "Repaint by scrolling from bottom of screen",
+ "Repaint by painting from top of screen",
+ "Repaint by painting from top of screen"
+ }
+ },
+ { 'd', &d_optname,
+ BOOL|NO_TOGGLE, OPT_OFF, &know_dumb, NULL,
+ {
+ "Assume intelligent terminal",
+ "Assume dumb terminal",
+ NULL
+ }
+ },
+#if MSDOS_COMPILER
+ { 'D', &D__optname,
+ STRING|REPAINT|NO_QUERY, 0, NULL, opt_D,
+ {
+ "color desc: ",
+ "Ddknsu0123456789.",
+ NULL
+ }
+ },
+#endif
+ { 'e', &e_optname,
+ TRIPLE, OPT_OFF, &quit_at_eof, NULL,
+ {
+ "Don't quit at end-of-file",
+ "Quit at end-of-file",
+ "Quit immediately at end-of-file"
+ }
+ },
+ { 'f', &f_optname,
+ BOOL, OPT_OFF, &force_open, NULL,
+ {
+ "Open only regular files",
+ "Open even non-regular files",
+ NULL
+ }
+ },
+ { 'F', &F__optname,
+ BOOL, OPT_OFF, &quit_if_one_screen, NULL,
+ {
+ "Don't quit if end-of-file on first screen",
+ "Quit if end-of-file on first screen",
+ NULL
+ }
+ },
+#if HILITE_SEARCH
+ { 'g', &g_optname,
+ TRIPLE|HL_REPAINT, OPT_ONPLUS, &hilite_search, NULL,
+ {
+ "Don't highlight search matches",
+ "Highlight matches for previous search only",
+ "Highlight all matches for previous search pattern",
+ }
+ },
+#endif
+ { 'h', &h_optname,
+ NUMBER, -1, &back_scroll, NULL,
+ {
+ "Backwards scroll limit: ",
+ "Backwards scroll limit is %d lines",
+ NULL
+ }
+ },
+ { 'i', &i_optname,
+ TRIPLE|HL_REPAINT, OPT_OFF, &caseless, opt_i,
+ {
+ "Case is significant in searches",
+ "Ignore case in searches",
+ "Ignore case in searches and in patterns"
+ }
+ },
+ { 'j', &j_optname,
+ STRING, 0, NULL, opt_j,
+ {
+ "Target line: ",
+ "0123456789.-",
+ NULL
+ }
+ },
+ { 'J', &J__optname,
+ BOOL|REPAINT, OPT_OFF, &status_col, NULL,
+ {
+ "Don't display a status column",
+ "Display a status column",
+ NULL
+ }
+ },
+#if USERFILE
+ { 'k', &k_optname,
+ STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_k,
+ { NULL, NULL, NULL }
+ },
+#endif
+ { 'K', &K__optname,
+ BOOL, OPT_OFF, &quit_on_intr, NULL,
+ {
+ "Interrupt (ctrl-C) returns to prompt",
+ "Interrupt (ctrl-C) exits less",
+ NULL
+ }
+ },
+ { 'L', &L__optname,
+ BOOL, OPT_ON, &use_lessopen, NULL,
+ {
+ "Don't use the LESSOPEN filter",
+ "Use the LESSOPEN filter",
+ NULL
+ }
+ },
+ { 'm', &m_optname,
+ TRIPLE, OPT_OFF, &pr_type, NULL,
+ {
+ "Short prompt",
+ "Medium prompt",
+ "Long prompt"
+ }
+ },
+ { 'n', &n_optname,
+ TRIPLE|REPAINT, OPT_ON, &linenums, NULL,
+ {
+ "Don't use line numbers",
+ "Use line numbers",
+ "Constantly display line numbers"
+ }
+ },
+#if LOGFILE
+ { 'o', &o_optname,
+ STRING, 0, NULL, opt_o,
+ { "log file: ", NULL, NULL }
+ },
+ { 'O', &O__optname,
+ STRING, 0, NULL, opt__O,
+ { "Log file: ", NULL, NULL }
+ },
+#endif
+ { 'p', &p_optname,
+ STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_p,
+ { NULL, NULL, NULL }
+ },
+ { 'P', &P__optname,
+ STRING, 0, NULL, opt__P,
+ { "prompt: ", NULL, NULL }
+ },
+ { 'q', &q_optname,
+ TRIPLE, OPT_OFF, &quiet, NULL,
+ {
+ "Ring the bell for errors AND at eof/bof",
+ "Ring the bell for errors but not at eof/bof",
+ "Never ring the bell"
+ }
+ },
+ { 'r', &r_optname,
+ TRIPLE|REPAINT, OPT_OFF, &ctldisp, NULL,
+ {
+ "Display control characters as ^X",
+ "Display control characters directly",
+ "Display control characters directly, processing ANSI sequences"
+ }
+ },
+ { 's', &s_optname,
+ BOOL|REPAINT, OPT_OFF, &squeeze, NULL,
+ {
+ "Display all blank lines",
+ "Squeeze multiple blank lines",
+ NULL
+ }
+ },
+ { 'S', &S__optname,
+ BOOL|REPAINT, OPT_OFF, &chopline, NULL,
+ {
+ "Fold long lines",
+ "Chop long lines",
+ NULL
+ }
+ },
+#if TAGS
+ { 't', &t_optname,
+ STRING|NO_QUERY, 0, NULL, opt_t,
+ { "tag: ", NULL, NULL }
+ },
+ { 'T', &T__optname,
+ STRING, 0, NULL, opt__T,
+ { "tags file: ", NULL, NULL }
+ },
+#endif
+ { 'u', &u_optname,
+ TRIPLE|REPAINT, OPT_OFF, &bs_mode, NULL,
+ {
+ "Display underlined text in underline mode",
+ "Backspaces cause overstrike",
+ "Print backspace as ^H"
+ }
+ },
+ { 'V', &V__optname,
+ NOVAR, 0, NULL, opt__V,
+ { NULL, NULL, NULL }
+ },
+ { 'w', &w_optname,
+ TRIPLE|REPAINT, OPT_OFF, &show_attn, NULL,
+ {
+ "Don't highlight first unread line",
+ "Highlight first unread line after forward-screen",
+ "Highlight first unread line after any forward movement",
+ }
+ },
+ { 'x', &x_optname,
+ STRING|REPAINT, 0, NULL, opt_x,
+ {
+ "Tab stops: ",
+ "0123456789,",
+ NULL
+ }
+ },
+ { 'X', &X__optname,
+ BOOL|NO_TOGGLE, OPT_OFF, &no_init, NULL,
+ {
+ "Send init/deinit strings to terminal",
+ "Don't use init/deinit strings",
+ NULL
+ }
+ },
+ { 'y', &y_optname,
+ NUMBER, -1, &forw_scroll, NULL,
+ {
+ "Forward scroll limit: ",
+ "Forward scroll limit is %d lines",
+ NULL
+ }
+ },
+ { 'z', &z_optname,
+ NUMBER, -1, &swindow, NULL,
+ {
+ "Scroll window size: ",
+ "Scroll window size is %d lines",
+ NULL
+ }
+ },
+ { '"', "e_optname,
+ STRING, 0, NULL, opt_quote,
+ { "quotes: ", NULL, NULL }
+ },
+ { '~', &tilde_optname,
+ BOOL|REPAINT, OPT_ON, &twiddle, NULL,
+ {
+ "Don't show tildes after end of file",
+ "Show tildes after end of file",
+ NULL
+ }
+ },
+ { '?', &query_optname,
+ NOVAR, 0, NULL, opt_query,
+ { NULL, NULL, NULL }
+ },
+ { '#', £_optname,
+ STRING, 0, NULL, opt_shift,
+ {
+ "Horizontal shift: ",
+ "0123456789.",
+ NULL
+ }
+ },
+ { OLETTER_NONE, &keypad_optname,
+ BOOL|NO_TOGGLE, OPT_OFF, &no_keypad, NULL,
+ {
+ "Use keypad mode",
+ "Don't use keypad mode",
+ NULL
+ }
+ },
+ { OLETTER_NONE, &oldbot_optname,
+ BOOL, OPT_OFF, &oldbot, NULL,
+ {
+ "Use new bottom of screen behavior",
+ "Use old bottom of screen behavior",
+ NULL
+ }
+ },
+ { OLETTER_NONE, &follow_optname,
+ BOOL, FOLLOW_DESC, &follow_mode, NULL,
+ {
+ "F command follows file descriptor",
+ "F command follows file name",
+ NULL
+ }
+ },
+ { OLETTER_NONE, &use_backslash_optname,
+ BOOL, OPT_OFF, &opt_use_backslash, NULL,
+ {
+ "Use backslash escaping in command line parameters",
+ "Don't use backslash escaping in command line parameters",
+ NULL
+ }
+ },
+ { '\0', NULL, NOVAR, 0, NULL, NULL, { NULL, NULL, NULL } }
+};
+
+
+/*
+ * Initialize each option to its default value.
+ */
+ public void
+init_option()
+{
+ register struct loption *o;
+ char *p;
+
+ p = lgetenv("LESS_IS_MORE");
+ if (p != NULL && *p != '\0')
+ less_is_more = 1;
+
+ for (o = option; o->oletter != '\0'; o++)
+ {
+ /*
+ * Set each variable to its default.
+ */
+ if (o->ovar != NULL)
+ *(o->ovar) = o->odefault;
+ if (o->otype & INIT_HANDLER)
+ (*(o->ofunc))(INIT, (char *) NULL);
+ }
+}
+
+/*
+ * Find an option in the option table, given its option letter.
+ */
+ public struct loption *
+findopt(c)
+ int c;
+{
+ register struct loption *o;
+
+ for (o = option; o->oletter != '\0'; o++)
+ {
+ if (o->oletter == c)
+ return (o);
+ if ((o->otype & TRIPLE) && ASCII_TO_UPPER(o->oletter) == c)
+ return (o);
+ }
+ return (NULL);
+}
+
+/*
+ *
+ */
+ static int
+is_optchar(c)
+ char c;
+{
+ if (ASCII_IS_UPPER(c))
+ return 1;
+ if (ASCII_IS_LOWER(c))
+ return 1;
+ if (c == '-')
+ return 1;
+ return 0;
+}
+
+/*
+ * Find an option in the option table, given its option name.
+ * p_optname is the (possibly partial) name to look for, and
+ * is updated to point after the matched name.
+ * p_oname if non-NULL is set to point to the full option name.
+ */
+ public struct loption *
+findopt_name(p_optname, p_oname, p_err)
+ char **p_optname;
+ char **p_oname;
+ int *p_err;
+{
+ char *optname = *p_optname;
+ register struct loption *o;
+ register struct optname *oname;
+ register int len;
+ int uppercase;
+ struct loption *maxo = NULL;
+ struct optname *maxoname = NULL;
+ int maxlen = 0;
+ int ambig = 0;
+ int exact = 0;
+
+ /*
+ * Check all options.
+ */
+ for (o = option; o->oletter != '\0'; o++)
+ {
+ /*
+ * Check all names for this option.
+ */
+ for (oname = o->onames; oname != NULL; oname = oname->onext)
+ {
+ /*
+ * Try normal match first (uppercase == 0),
+ * then, then if it's a TRIPLE option,
+ * try uppercase match (uppercase == 1).
+ */
+ for (uppercase = 0; uppercase <= 1; uppercase++)
+ {
+ len = sprefix(optname, oname->oname, uppercase);
+ if (len <= 0 || is_optchar(optname[len]))
+ {
+ /*
+ * We didn't use all of the option name.
+ */
+ continue;
+ }
+ if (!exact && len == maxlen)
+ /*
+ * Already had a partial match,
+ * and now there's another one that
+ * matches the same length.
+ */
+ ambig = 1;
+ else if (len > maxlen)
+ {
+ /*
+ * Found a better match than
+ * the one we had.
+ */
+ maxo = o;
+ maxoname = oname;
+ maxlen = len;
+ ambig = 0;
+ exact = (len == (int)strlen(oname->oname));
+ }
+ if (!(o->otype & TRIPLE))
+ break;
+ }
+ }
+ }
+ if (ambig)
+ {
+ /*
+ * Name matched more than one option.
+ */
+ if (p_err != NULL)
+ *p_err = OPT_AMBIG;
+ return (NULL);
+ }
+ *p_optname = optname + maxlen;
+ if (p_oname != NULL)
+ *p_oname = maxoname == NULL ? NULL : maxoname->oname;
+ return (maxo);
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Operating system dependent routines.
+ *
+ * Most of the stuff in here is based on Unix, but an attempt
+ * has been made to make things work on other operating systems.
+ * This will sometimes result in a loss of functionality, unless
+ * someone rewrites code specifically for the new operating system.
+ *
+ * The makefile provides defines to decide whether various
+ * Unix features are present.
+ */
+
+#include "less.h"
+#include <signal.h>
+#include <setjmp.h>
+#if HAVE_TIME_H
+#include <time.h>
+#endif
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#if HAVE_VALUES_H
+#include <values.h>
+#endif
+
+/*
+ * BSD setjmp() saves (and longjmp() restores) the signal mask.
+ * This costs a system call or two per setjmp(), so if possible we clear the
+ * signal mask with sigsetmask(), and use _setjmp()/_longjmp() instead.
+ * On other systems, setjmp() doesn't affect the signal mask and so
+ * _setjmp() does not exist; we just use setjmp().
+ */
+#if HAVE__SETJMP && HAVE_SIGSETMASK
+#define SET_JUMP _setjmp
+#define LONG_JUMP _longjmp
+#else
+#define SET_JUMP setjmp
+#define LONG_JUMP longjmp
+#endif
+
+public int reading;
+
+static jmp_buf read_label;
+
+extern int sigs;
+
+/*
+ * Like read() system call, but is deliberately interruptible.
+ * A call to intread() from a signal handler will interrupt
+ * any pending iread().
+ */
+ public int
+iread(fd, buf, len)
+ int fd;
+ char *buf;
+ unsigned int len;
+{
+ register int n;
+
+start:
+#if MSDOS_COMPILER==WIN32C
+ if (ABORT_SIGS())
+ return (READ_INTR);
+#else
+#if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC
+ if (kbhit())
+ {
+ int c;
+
+ c = getch();
+ if (c == '\003')
+ return (READ_INTR);
+ ungetch(c);
+ }
+#endif
+#endif
+ if (SET_JUMP(read_label))
+ {
+ /*
+ * We jumped here from intread.
+ */
+ reading = 0;
+#if HAVE_SIGPROCMASK
+ {
+ sigset_t mask;
+ sigemptyset(&mask);
+ sigprocmask(SIG_SETMASK, &mask, NULL);
+ }
+#else
+#if HAVE_SIGSETMASK
+ sigsetmask(0);
+#else
+#ifdef _OSK
+ sigmask(~0);
+#endif
+#endif
+#endif
+ return (READ_INTR);
+ }
+
+ flush();
+ reading = 1;
+#if MSDOS_COMPILER==DJGPPC
+ if (isatty(fd))
+ {
+ /*
+ * Don't try reading from a TTY until a character is
+ * available, because that makes some background programs
+ * believe DOS is busy in a way that prevents those
+ * programs from working while "less" waits.
+ */
+ fd_set readfds;
+
+ FD_ZERO(&readfds);
+ FD_SET(fd, &readfds);
+ if (select(fd+1, &readfds, 0, 0, 0) == -1)
+ return (-1);
+ }
+#endif
+ n = read(fd, buf, len);
+#if 1
+ /*
+ * This is a kludge to workaround a problem on some systems
+ * where terminating a remote tty connection causes read() to
+ * start returning 0 forever, instead of -1.
+ */
+ {
+ extern int ignore_eoi;
+ if (!ignore_eoi)
+ {
+ static int consecutive_nulls = 0;
+ if (n == 0)
+ consecutive_nulls++;
+ else
+ consecutive_nulls = 0;
+ if (consecutive_nulls > 20)
+ quit(QUIT_ERROR);
+ }
+ }
+#endif
+ reading = 0;
+ if (n < 0)
+ {
+#if HAVE_ERRNO
+ /*
+ * Certain values of errno indicate we should just retry the read.
+ */
+#if MUST_DEFINE_ERRNO
+ extern int errno;
+#endif
+#ifdef EINTR
+ if (errno == EINTR)
+ goto start;
+#endif
+#ifdef EAGAIN
+ if (errno == EAGAIN)
+ goto start;
+#endif
+#endif
+ return (-1);
+ }
+ return (n);
+}
+
+/*
+ * Interrupt a pending iread().
+ */
+ public void
+intread()
+{
+ LONG_JUMP(read_label, 1);
+}
+
+/*
+ * Return the current time.
+ */
+#if HAVE_TIME
+ public time_type
+get_time()
+{
+ time_type t;
+
+ time(&t);
+ return (t);
+}
+#endif
+
+
+#if !HAVE_STRERROR
+/*
+ * Local version of strerror, if not available from the system.
+ */
+ static char *
+strerror(err)
+ int err;
+{
+#if HAVE_SYS_ERRLIST
+ static char buf[16];
+ extern char *sys_errlist[];
+ extern int sys_nerr;
+
+ if (err < sys_nerr)
+ return sys_errlist[err];
+ sprintf(buf, "Error %d", err);
+ return buf;
+#else
+ return ("cannot open");
+#endif
+}
+#endif
+
+/*
+ * errno_message: Return an error message based on the value of "errno".
+ */
+ public char *
+errno_message(filename)
+ char *filename;
+{
+ register char *p;
+ register char *m;
+ int len;
+#if HAVE_ERRNO
+#if MUST_DEFINE_ERRNO
+ extern int errno;
+#endif
+ p = strerror(errno);
+#else
+ p = "cannot open";
+#endif
+ len = (int) (strlen(filename) + strlen(p) + 3);
+ m = (char *) ecalloc(len, sizeof(char));
+ SNPRINTF2(m, len, "%s: %s", filename, p);
+ return (m);
+}
+
+/* #define HAVE_FLOAT 0 */
+
+ static POSITION
+muldiv(val, num, den)
+ POSITION val, num, den;
+{
+#if HAVE_FLOAT
+ double v = (((double) val) * num) / den;
+ return ((POSITION) (v + 0.5));
+#else
+ POSITION v = ((POSITION) val) * num;
+
+ if (v / num == val)
+ /* No overflow */
+ return (POSITION) (v / den);
+ else
+ /* Above calculation overflows;
+ * use a method that is less precise but won't overflow. */
+ return (POSITION) (val / (den / num));
+#endif
+}
+
+/*
+ * Return the ratio of two POSITIONS, as a percentage.
+ * {{ Assumes a POSITION is a long int. }}
+ */
+ public int
+percentage(num, den)
+ POSITION num, den;
+{
+ return (int) muldiv(num, (POSITION) 100, den);
+}
+
+/*
+ * Return the specified percentage of a POSITION.
+ */
+ public POSITION
+percent_pos(pos, percent, fraction)
+ POSITION pos;
+ int percent;
+ long fraction;
+{
+ /* Change percent (parts per 100) to perden (parts per NUM_FRAC_DENOM). */
+ POSITION perden = (percent * (NUM_FRAC_DENOM / 100)) + (fraction / 100);
+
+ if (perden == 0)
+ return (0);
+ return (POSITION) muldiv(pos, perden, (POSITION) NUM_FRAC_DENOM);
+}
+
+#if !HAVE_STRCHR
+/*
+ * strchr is used by regexp.c.
+ */
+ char *
+strchr(s, c)
+ char *s;
+ int c;
+{
+ for ( ; *s != '\0'; s++)
+ if (*s == c)
+ return (s);
+ if (c == '\0')
+ return (s);
+ return (NULL);
+}
+#endif
+
+#if !HAVE_MEMCPY
+ VOID_POINTER
+memcpy(dst, src, len)
+ VOID_POINTER dst;
+ VOID_POINTER src;
+ int len;
+{
+ char *dstp = (char *) dst;
+ char *srcp = (char *) src;
+ int i;
+
+ for (i = 0; i < len; i++)
+ dstp[i] = srcp[i];
+ return (dst);
+}
+#endif
+
+#ifdef _OSK_MWC32
+
+/*
+ * This implements an ANSI-style intercept setup for Microware C 3.2
+ */
+ public int
+os9_signal(type, handler)
+ int type;
+ RETSIGTYPE (*handler)();
+{
+ intercept(handler);
+}
+
+#include <sgstat.h>
+
+ int
+isatty(f)
+ int f;
+{
+ struct sgbuf sgbuf;
+
+ if (_gs_opt(f, &sgbuf) < 0)
+ return -1;
+ return (sgbuf.sg_class == 0);
+}
+
+#endif
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * High level routines dealing with the output to the screen.
+ */
+
+#include "less.h"
+#if MSDOS_COMPILER==WIN32C
+#include "windows.h"
+#endif
+
+public int errmsgs; /* Count of messages displayed by error() */
+public int need_clr;
+public int final_attr;
+public int at_prompt;
+
+extern int sigs;
+extern int sc_width;
+extern int so_s_width, so_e_width;
+extern int screen_trashed;
+extern int any_display;
+extern int is_tty;
+extern int oldbot;
+
+#if MSDOS_COMPILER==WIN32C || MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+extern int ctldisp;
+extern int nm_fg_color, nm_bg_color;
+extern int bo_fg_color, bo_bg_color;
+extern int ul_fg_color, ul_bg_color;
+extern int so_fg_color, so_bg_color;
+extern int bl_fg_color, bl_bg_color;
+#endif
+
+/*
+ * Display the line which is in the line buffer.
+ */
+ public void
+put_line()
+{
+ register int c;
+ register int i;
+ int a;
+
+ if (ABORT_SIGS())
+ {
+ /*
+ * Don't output if a signal is pending.
+ */
+ screen_trashed = 1;
+ return;
+ }
+
+ final_attr = AT_NORMAL;
+
+ for (i = 0; (c = gline(i, &a)) != '\0'; i++)
+ {
+ at_switch(a);
+ final_attr = a;
+ if (c == '\b')
+ putbs();
+ else
+ putchr(c);
+ }
+
+ at_exit();
+}
+
+static char obuf[OUTBUF_SIZE];
+static char *ob = obuf;
+
+/*
+ * Flush buffered output.
+ *
+ * If we haven't displayed any file data yet,
+ * output messages on error output (file descriptor 2),
+ * otherwise output on standard output (file descriptor 1).
+ *
+ * This has the desirable effect of producing all
+ * error messages on error output if standard output
+ * is directed to a file. It also does the same if
+ * we never produce any real output; for example, if
+ * the input file(s) cannot be opened. If we do
+ * eventually produce output, code in edit() makes
+ * sure these messages can be seen before they are
+ * overwritten or scrolled away.
+ */
+ public void
+flush()
+{
+ register int n;
+ register int fd;
+
+ n = (int) (ob - obuf);
+ if (n == 0)
+ return;
+
+#if MSDOS_COMPILER==MSOFTC
+ if (is_tty && any_display)
+ {
+ *ob = '\0';
+ _outtext(obuf);
+ ob = obuf;
+ return;
+ }
+#else
+#if MSDOS_COMPILER==WIN32C || MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+ if (is_tty && any_display)
+ {
+ *ob = '\0';
+ if (ctldisp != OPT_ONPLUS)
+ WIN32textout(obuf, ob - obuf);
+ else
+ {
+ /*
+ * Look for SGR escape sequences, and convert them
+ * to color commands. Replace bold, underline,
+ * and italic escapes into colors specified via
+ * the -D command-line option.
+ */
+ char *anchor, *p, *p_next;
+ unsigned char fg, bg;
+ static unsigned char at;
+#if MSDOS_COMPILER==WIN32C
+ /* Screen colors used by 3x and 4x SGR commands. */
+ static unsigned char screen_color[] = {
+ 0, /* BLACK */
+ FOREGROUND_RED,
+ FOREGROUND_GREEN,
+ FOREGROUND_RED|FOREGROUND_GREEN,
+ FOREGROUND_BLUE,
+ FOREGROUND_BLUE|FOREGROUND_RED,
+ FOREGROUND_BLUE|FOREGROUND_GREEN,
+ FOREGROUND_BLUE|FOREGROUND_GREEN|FOREGROUND_RED
+ };
+#else
+ static enum COLORS screen_color[] = {
+ BLACK, RED, GREEN, BROWN,
+ BLUE, MAGENTA, CYAN, LIGHTGRAY
+ };
+#endif
+
+ for (anchor = p_next = obuf;
+ (p_next = memchr(p_next, ESC, ob - p_next)) != NULL; )
+ {
+ p = p_next;
+ if (p[1] == '[') /* "ESC-[" sequence */
+ {
+ if (p > anchor)
+ {
+ /*
+ * If some chars seen since
+ * the last escape sequence,
+ * write them out to the screen.
+ */
+ WIN32textout(anchor, p-anchor);
+ anchor = p;
+ }
+ p += 2; /* Skip the "ESC-[" */
+ if (is_ansi_end(*p))
+ {
+ /*
+ * Handle null escape sequence
+ * "ESC[m", which restores
+ * the normal color.
+ */
+ p++;
+ anchor = p_next = p;
+ at = 0;
+ WIN32setcolors(nm_fg_color, nm_bg_color);
+ continue;
+ }
+ p_next = p;
+
+ /*
+ * Select foreground/background colors
+ * based on the escape sequence.
+ */
+ fg = nm_fg_color;
+ bg = nm_bg_color;
+ while (!is_ansi_end(*p))
+ {
+ char *q;
+ long code = strtol(p, &q, 10);
+
+ if (*q == '\0')
+ {
+ /*
+ * Incomplete sequence.
+ * Leave it unprocessed
+ * in the buffer.
+ */
+ int slop = (int) (q - anchor);
+ /* {{ strcpy args overlap! }} */
+ strcpy(obuf, anchor);
+ ob = &obuf[slop];
+ return;
+ }
+
+ if (q == p ||
+ code > 49 || code < 0 ||
+ (!is_ansi_end(*q) && *q != ';'))
+ {
+ p_next = q;
+ break;
+ }
+ if (*q == ';')
+ q++;
+
+ switch (code)
+ {
+ default:
+ /* case 0: all attrs off */
+ fg = nm_fg_color;
+ bg = nm_bg_color;
+ at = 0;
+ break;
+ case 1: /* bold on */
+ at |= 1;
+ break;
+ case 3: /* italic on */
+ case 7: /* inverse on */
+ at |= 2;
+ break;
+ case 4: /* underline on */
+ at |= 4;
+ break;
+ case 5: /* slow blink on */
+ case 6: /* fast blink on */
+ at |= 8;
+ break;
+ case 8: /* concealed on */
+ fg = (bg & 7) | 8;
+ break;
+ case 22: /* bold off */
+ at &= ~1;
+ break;
+ case 23: /* italic off */
+ case 27: /* inverse off */
+ at &= ~2;
+ break;
+ case 24: /* underline off */
+ at &= ~4;
+ break;
+ case 30: case 31: case 32:
+ case 33: case 34: case 35:
+ case 36: case 37:
+ fg = (fg & 8) | (screen_color[code - 30]);
+ break;
+ case 39: /* default fg */
+ fg = nm_fg_color;
+ break;
+ case 40: case 41: case 42:
+ case 43: case 44: case 45:
+ case 46: case 47:
+ bg = (bg & 8) | (screen_color[code - 40]);
+ break;
+ case 49: /* default fg */
+ bg = nm_bg_color;
+ break;
+ }
+ p = q;
+ }
+ if (!is_ansi_end(*p) || p == p_next)
+ break;
+ if (at & 1)
+ {
+ /*
+ * If \e[1m use defined bold
+ * color, else set intensity.
+ */
+ if (p[-2] == '[')
+ {
+#if MSDOS_COMPILER==WIN32C
+ fg |= FOREGROUND_INTENSITY;
+ bg |= BACKGROUND_INTENSITY;
+#else
+ fg = bo_fg_color;
+ bg = bo_bg_color;
+#endif
+ } else
+ fg |= 8;
+ } else if (at & 2)
+ {
+ fg = so_fg_color;
+ bg = so_bg_color;
+ } else if (at & 4)
+ {
+ fg = ul_fg_color;
+ bg = ul_bg_color;
+ } else if (at & 8)
+ {
+ fg = bl_fg_color;
+ bg = bl_bg_color;
+ }
+ fg &= 0xf;
+ bg &= 0xf;
+ WIN32setcolors(fg, bg);
+ p_next = anchor = p + 1;
+ } else
+ p_next++;
+ }
+
+ /* Output what's left in the buffer. */
+ WIN32textout(anchor, ob - anchor);
+ }
+ ob = obuf;
+ return;
+ }
+#endif
+#endif
+ fd = (any_display) ? 1 : 2;
+ if (write(fd, obuf, n) != n)
+ screen_trashed = 1;
+ ob = obuf;
+}
+
+/*
+ * Output a character.
+ */
+ public int
+putchr(c)
+ int c;
+{
+#if 0 /* fake UTF-8 output for testing */
+ extern int utf_mode;
+ if (utf_mode)
+ {
+ static char ubuf[MAX_UTF_CHAR_LEN];
+ static int ubuf_len = 0;
+ static int ubuf_index = 0;
+ if (ubuf_len == 0)
+ {
+ ubuf_len = utf_len(c);
+ ubuf_index = 0;
+ }
+ ubuf[ubuf_index++] = c;
+ if (ubuf_index < ubuf_len)
+ return c;
+ c = get_wchar(ubuf) & 0xFF;
+ ubuf_len = 0;
+ }
+#endif
+ if (need_clr)
+ {
+ need_clr = 0;
+ clear_bot();
+ }
+#if MSDOS_COMPILER
+ if (c == '\n' && is_tty)
+ {
+ /* remove_top(1); */
+ putchr('\r');
+ }
+#else
+#ifdef _OSK
+ if (c == '\n' && is_tty) /* In OS-9, '\n' == 0x0D */
+ putchr(0x0A);
+#endif
+#endif
+ /*
+ * Some versions of flush() write to *ob, so we must flush
+ * when we are still one char from the end of obuf.
+ */
+ if (ob >= &obuf[sizeof(obuf)-1])
+ flush();
+ *ob++ = c;
+ at_prompt = 0;
+ return (c);
+}
+
+/*
+ * Output a string.
+ */
+ public void
+putstr(s)
+ register char *s;
+{
+ while (*s != '\0')
+ putchr(*s++);
+}
+
+
+/*
+ * Convert an integral type to a string.
+ */
+#define TYPE_TO_A_FUNC(funcname, type) \
+void funcname(num, buf) \
+ type num; \
+ char *buf; \
+{ \
+ int neg = (num < 0); \
+ char tbuf[INT_STRLEN_BOUND(num)+2]; \
+ register char *s = tbuf + sizeof(tbuf); \
+ if (neg) num = -num; \
+ *--s = '\0'; \
+ do { \
+ *--s = (num % 10) + '0'; \
+ } while ((num /= 10) != 0); \
+ if (neg) *--s = '-'; \
+ strcpy(buf, s); \
+}
+
+TYPE_TO_A_FUNC(postoa, POSITION)
+TYPE_TO_A_FUNC(linenumtoa, LINENUM)
+TYPE_TO_A_FUNC(inttoa, int)
+
+/*
+ * Output an integer in a given radix.
+ */
+ static int
+iprint_int(num)
+ int num;
+{
+ char buf[INT_STRLEN_BOUND(num)];
+
+ inttoa(num, buf);
+ putstr(buf);
+ return ((int) strlen(buf));
+}
+
+/*
+ * Output a line number in a given radix.
+ */
+ static int
+iprint_linenum(num)
+ LINENUM num;
+{
+ char buf[INT_STRLEN_BOUND(num)];
+
+ linenumtoa(num, buf);
+ putstr(buf);
+ return ((int) strlen(buf));
+}
+
+/*
+ * This function implements printf-like functionality
+ * using a more portable argument list mechanism than printf's.
+ */
+ static int
+less_printf(fmt, parg)
+ register char *fmt;
+ PARG *parg;
+{
+ register char *s;
+ register int col;
+
+ col = 0;
+ while (*fmt != '\0')
+ {
+ if (*fmt != '%')
+ {
+ putchr(*fmt++);
+ col++;
+ } else
+ {
+ ++fmt;
+ switch (*fmt++)
+ {
+ case 's':
+ s = parg->p_string;
+ parg++;
+ while (*s != '\0')
+ {
+ putchr(*s++);
+ col++;
+ }
+ break;
+ case 'd':
+ col += iprint_int(parg->p_int);
+ parg++;
+ break;
+ case 'n':
+ col += iprint_linenum(parg->p_linenum);
+ parg++;
+ break;
+ }
+ }
+ }
+ return (col);
+}
+
+/*
+ * Get a RETURN.
+ * If some other non-trivial char is pressed, unget it, so it will
+ * become the next command.
+ */
+ public void
+get_return()
+{
+ int c;
+
+#if ONLY_RETURN
+ while ((c = getchr()) != '\n' && c != '\r')
+ bell();
+#else
+ c = getchr();
+ if (c != '\n' && c != '\r' && c != ' ' && c != READ_INTR)
+ ungetcc(c);
+#endif
+}
+
+/*
+ * Output a message in the lower left corner of the screen
+ * and wait for carriage return.
+ */
+ public void
+error(fmt, parg)
+ char *fmt;
+ PARG *parg;
+{
+ int col = 0;
+ static char return_to_continue[] = " (press RETURN)";
+
+ errmsgs++;
+
+ if (any_display && is_tty)
+ {
+ if (!oldbot)
+ squish_check();
+ at_exit();
+ clear_bot();
+ at_enter(AT_STANDOUT);
+ col += so_s_width;
+ }
+
+ col += less_printf(fmt, parg);
+
+ if (!(any_display && is_tty))
+ {
+ putchr('\n');
+ return;
+ }
+
+ putstr(return_to_continue);
+ at_exit();
+ col += sizeof(return_to_continue) + so_e_width;
+
+ get_return();
+ lower_left();
+ clear_eol();
+
+ if (col >= sc_width)
+ /*
+ * Printing the message has probably scrolled the screen.
+ * {{ Unless the terminal doesn't have auto margins,
+ * in which case we just hammered on the right margin. }}
+ */
+ screen_trashed = 1;
+
+ flush();
+}
+
+static char intr_to_abort[] = "... (interrupt to abort)";
+
+/*
+ * Output a message in the lower left corner of the screen
+ * and don't wait for carriage return.
+ * Usually used to warn that we are beginning a potentially
+ * time-consuming operation.
+ */
+ public void
+ierror(fmt, parg)
+ char *fmt;
+ PARG *parg;
+{
+ at_exit();
+ clear_bot();
+ at_enter(AT_STANDOUT);
+ (void) less_printf(fmt, parg);
+ putstr(intr_to_abort);
+ at_exit();
+ flush();
+ need_clr = 1;
+}
+
+/*
+ * Output a message in the lower left corner of the screen
+ * and return a single-character response.
+ */
+ public int
+query(fmt, parg)
+ char *fmt;
+ PARG *parg;
+{
+ register int c;
+ int col = 0;
+
+ if (any_display && is_tty)
+ clear_bot();
+
+ (void) less_printf(fmt, parg);
+ c = getchr();
+
+ if (!(any_display && is_tty))
+ {
+ putchr('\n');
+ return (c);
+ }
+
+ lower_left();
+ if (col >= sc_width)
+ screen_trashed = 1;
+ flush();
+
+ return (c);
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+/*
+ * Routines to do pattern matching.
+ */
+
+#include "less.h"
+#include "pattern.h"
+
+extern int caseless;
+
+/*
+ * Compile a search pattern, for future use by match_pattern.
+ */
+ static int
+compile_pattern2(pattern, search_type, comp_pattern, show_error)
+ char *pattern;
+ int search_type;
+ void **comp_pattern;
+ int show_error;
+{
+ if (search_type & SRCH_NO_REGEX)
+ return (0);
+ {
+#if HAVE_GNU_REGEX
+ struct re_pattern_buffer *comp = (struct re_pattern_buffer *)
+ ecalloc(1, sizeof(struct re_pattern_buffer));
+ struct re_pattern_buffer **pcomp =
+ (struct re_pattern_buffer **) comp_pattern;
+ re_set_syntax(RE_SYNTAX_POSIX_EXTENDED);
+ if (re_compile_pattern(pattern, strlen(pattern), comp))
+ {
+ free(comp);
+ if (show_error)
+ error("Invalid pattern", NULL_PARG);
+ return (-1);
+ }
+ if (*pcomp != NULL)
+ regfree(*pcomp);
+ *pcomp = comp;
+#endif
+#if HAVE_POSIX_REGCOMP
+ regex_t *comp = (regex_t *) ecalloc(1, sizeof(regex_t));
+ regex_t **pcomp = (regex_t **) comp_pattern;
+ if (regcomp(comp, pattern, REGCOMP_FLAG))
+ {
+ free(comp);
+ if (show_error)
+ error("Invalid pattern", NULL_PARG);
+ return (-1);
+ }
+ if (*pcomp != NULL)
+ regfree(*pcomp);
+ *pcomp = comp;
+#endif
+#if HAVE_PCRE
+ pcre *comp;
+ pcre **pcomp = (pcre **) comp_pattern;
+ constant char *errstring;
+ int erroffset;
+ PARG parg;
+ comp = pcre_compile(pattern, 0,
+ &errstring, &erroffset, NULL);
+ if (comp == NULL)
+ {
+ parg.p_string = (char *) errstring;
+ if (show_error)
+ error("%s", &parg);
+ return (-1);
+ }
+ *pcomp = comp;
+#endif
+#if HAVE_RE_COMP
+ PARG parg;
+ int *pcomp = (int *) comp_pattern;
+ if ((parg.p_string = re_comp(pattern)) != NULL)
+ {
+ if (show_error)
+ error("%s", &parg);
+ return (-1);
+ }
+ *pcomp = 1;
+#endif
+#if HAVE_REGCMP
+ char *comp;
+ char **pcomp = (char **) comp_pattern;
+ if ((comp = regcmp(pattern, 0)) == NULL)
+ {
+ if (show_error)
+ error("Invalid pattern", NULL_PARG);
+ return (-1);
+ }
+ if (pcomp != NULL)
+ free(*pcomp);
+ *pcomp = comp;
+#endif
+#if HAVE_V8_REGCOMP
+ struct regexp *comp;
+ struct regexp **pcomp = (struct regexp **) comp_pattern;
+ reg_show_error = show_error;
+ comp = regcomp(pattern);
+ reg_show_error = 1;
+ if (comp == NULL)
+ {
+ /*
+ * regcomp has already printed an error message
+ * via regerror().
+ */
+ return (-1);
+ }
+ if (*pcomp != NULL)
+ free(*pcomp);
+ *pcomp = comp;
+#endif
+ }
+ return (0);
+}
+
+/*
+ * Like compile_pattern2, but convert the pattern to lowercase if necessary.
+ */
+ public int
+compile_pattern(pattern, search_type, comp_pattern)
+ char *pattern;
+ int search_type;
+ void **comp_pattern;
+{
+ char *cvt_pattern;
+ int result;
+
+ if (caseless != OPT_ONPLUS)
+ cvt_pattern = pattern;
+ else
+ {
+ cvt_pattern = (char*) ecalloc(1, cvt_length(strlen(pattern), CVT_TO_LC));
+ cvt_text(cvt_pattern, pattern, (int *)NULL, (int *)NULL, CVT_TO_LC);
+ }
+ result = compile_pattern2(cvt_pattern, search_type, comp_pattern, 1);
+ if (cvt_pattern != pattern)
+ free(cvt_pattern);
+ return (result);
+}
+
+/*
+ * Forget that we have a compiled pattern.
+ */
+ public void
+uncompile_pattern(pattern)
+ void **pattern;
+{
+#if HAVE_GNU_REGEX
+ struct re_pattern_buffer **pcomp = (struct re_pattern_buffer **) pattern;
+ if (*pcomp != NULL)
+ regfree(*pcomp);
+ *pcomp = NULL;
+#endif
+#if HAVE_POSIX_REGCOMP
+ regex_t **pcomp = (regex_t **) pattern;
+ if (*pcomp != NULL)
+ regfree(*pcomp);
+ *pcomp = NULL;
+#endif
+#if HAVE_PCRE
+ pcre **pcomp = (pcre **) pattern;
+ if (*pcomp != NULL)
+ pcre_free(*pcomp);
+ *pcomp = NULL;
+#endif
+#if HAVE_RE_COMP
+ int *pcomp = (int *) pattern;
+ *pcomp = 0;
+#endif
+#if HAVE_REGCMP
+ char **pcomp = (char **) pattern;
+ if (*pcomp != NULL)
+ free(*pcomp);
+ *pcomp = NULL;
+#endif
+#if HAVE_V8_REGCOMP
+ struct regexp **pcomp = (struct regexp **) pattern;
+ if (*pcomp != NULL)
+ free(*pcomp);
+ *pcomp = NULL;
+#endif
+}
+
+/*
+ * Can a pattern be successfully compiled?
+ */
+ public int
+valid_pattern(pattern)
+ char *pattern;
+{
+ void *comp_pattern;
+ int result;
+
+ CLEAR_PATTERN(comp_pattern);
+ result = compile_pattern2(pattern, 0, &comp_pattern, 0);
+ if (result != 0)
+ return (0);
+ uncompile_pattern(&comp_pattern);
+ return (1);
+}
+
+/*
+ * Is a compiled pattern null?
+ */
+ public int
+is_null_pattern(pattern)
+ void *pattern;
+{
+#if HAVE_GNU_REGEX
+ return (pattern == NULL);
+#endif
+#if HAVE_POSIX_REGCOMP
+ return (pattern == NULL);
+#endif
+#if HAVE_PCRE
+ return (pattern == NULL);
+#endif
+#if HAVE_RE_COMP
+ return (pattern == 0);
+#endif
+#if HAVE_REGCMP
+ return (pattern == NULL);
+#endif
+#if HAVE_V8_REGCOMP
+ return (pattern == NULL);
+#endif
+#if NO_REGEX
+ return (pattern == NULL);
+#endif
+}
+
+/*
+ * Simple pattern matching function.
+ * It supports no metacharacters like *, etc.
+ */
+ static int
+match(pattern, pattern_len, buf, buf_len, pfound, pend)
+ char *pattern;
+ int pattern_len;
+ char *buf;
+ int buf_len;
+ char **pfound, **pend;
+{
+ register char *pp, *lp;
+ register char *pattern_end = pattern + pattern_len;
+ register char *buf_end = buf + buf_len;
+
+ for ( ; buf < buf_end; buf++)
+ {
+ for (pp = pattern, lp = buf; ; pp++, lp++)
+ {
+ char cp = *pp;
+ char cl = *lp;
+ if (caseless == OPT_ONPLUS && ASCII_IS_UPPER(cp))
+ cp = ASCII_TO_LOWER(cp);
+ if (cp != cl)
+ break;
+ if (pp == pattern_end || lp == buf_end)
+ break;
+ }
+ if (pp == pattern_end)
+ {
+ if (pfound != NULL)
+ *pfound = buf;
+ if (pend != NULL)
+ *pend = lp;
+ return (1);
+ }
+ }
+ return (0);
+}
+
+/*
+ * Perform a pattern match with the previously compiled pattern.
+ * Set sp and ep to the start and end of the matched string.
+ */
+ public int
+match_pattern(pattern, tpattern, line, line_len, sp, ep, notbol, search_type)
+ void *pattern;
+ char *tpattern;
+ char *line;
+ int line_len;
+ char **sp;
+ char **ep;
+ int notbol;
+ int search_type;
+{
+ int matched;
+#if HAVE_GNU_REGEX
+ struct re_pattern_buffer *spattern = (struct re_pattern_buffer *) pattern;
+#endif
+#if HAVE_POSIX_REGCOMP
+ regex_t *spattern = (regex_t *) pattern;
+#endif
+#if HAVE_PCRE
+ pcre *spattern = (pcre *) pattern;
+#endif
+#if HAVE_RE_COMP
+ int spattern = (int) pattern;
+#endif
+#if HAVE_REGCMP
+ char *spattern = (char *) pattern;
+#endif
+#if HAVE_V8_REGCOMP
+ struct regexp *spattern = (struct regexp *) pattern;
+#endif
+
+ *sp = *ep = NULL;
+#if NO_REGEX
+ search_type |= SRCH_NO_REGEX;
+#endif
+ if (search_type & SRCH_NO_REGEX)
+ matched = match(tpattern, strlen(tpattern), line, line_len, sp, ep);
+ else
+ {
+#if HAVE_GNU_REGEX
+ {
+ struct re_registers search_regs;
+ spattern->not_bol = notbol;
+ spattern->regs_allocated = REGS_UNALLOCATED;
+ matched = re_search(spattern, line, line_len, 0, line_len, &search_regs) >= 0;
+ if (matched)
+ {
+ *sp = line + search_regs.start[0];
+ *ep = line + search_regs.end[0];
+ }
+ }
+#endif
+#if HAVE_POSIX_REGCOMP
+ {
+ regmatch_t rm;
+ int flags = (notbol) ? REG_NOTBOL : 0;
+#ifdef REG_STARTEND
+ flags |= REG_STARTEND;
+ rm.rm_so = 0;
+ rm.rm_eo = line_len;
+#endif
+ matched = !regexec(spattern, line, 1, &rm, flags);
+ if (matched)
+ {
+#ifndef __WATCOMC__
+ *sp = line + rm.rm_so;
+ *ep = line + rm.rm_eo;
+#else
+ *sp = rm.rm_sp;
+ *ep = rm.rm_ep;
+#endif
+ }
+ }
+#endif
+#if HAVE_PCRE
+ {
+ int flags = (notbol) ? PCRE_NOTBOL : 0;
+ int ovector[3];
+ matched = pcre_exec(spattern, NULL, line, line_len,
+ 0, flags, ovector, 3) >= 0;
+ if (matched)
+ {
+ *sp = line + ovector[0];
+ *ep = line + ovector[1];
+ }
+ }
+#endif
+#if HAVE_RE_COMP
+ matched = (re_exec(line) == 1);
+ /*
+ * re_exec doesn't seem to provide a way to get the matched string.
+ */
+ *sp = *ep = NULL;
+#endif
+#if HAVE_REGCMP
+ *ep = regex(spattern, line);
+ matched = (*ep != NULL);
+ if (matched)
+ *sp = __loc1;
+#endif
+#if HAVE_V8_REGCOMP
+#if HAVE_REGEXEC2
+ matched = regexec2(spattern, line, notbol);
+#else
+ matched = regexec(spattern, line);
+#endif
+ if (matched)
+ {
+ *sp = spattern->startp[0];
+ *ep = spattern->endp[0];
+ }
+#endif
+ }
+ matched = (!(search_type & SRCH_NO_MATCH) && matched) ||
+ ((search_type & SRCH_NO_MATCH) && !matched);
+ return (matched);
+}
+
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+#if HAVE_GNU_REGEX
+#define __USE_GNU 1
+#include <regex.h>
+#define DEFINE_PATTERN(name) struct re_pattern_buffer *name
+#define CLEAR_PATTERN(name) name = NULL
+#endif
+
+#if HAVE_POSIX_REGCOMP
+#include <regex.h>
+#ifdef REG_EXTENDED
+#define REGCOMP_FLAG REG_EXTENDED
+#else
+#define REGCOMP_FLAG 0
+#endif
+#define DEFINE_PATTERN(name) regex_t *name
+#define CLEAR_PATTERN(name) name = NULL
+#endif
+
+#if HAVE_PCRE
+#include <pcre.h>
+#define DEFINE_PATTERN(name) pcre *name
+#define CLEAR_PATTERN(name) name = NULL
+#endif
+
+#if HAVE_RE_COMP
+char *re_comp();
+int re_exec();
+#define DEFINE_PATTERN(name) int name
+#define CLEAR_PATTERN(name) name = 0
+#endif
+
+#if HAVE_REGCMP
+char *regcmp();
+char *regex();
+extern char *__loc1;
+#define DEFINE_PATTERN(name) char *name
+#define CLEAR_PATTERN(name) name = NULL
+#endif
+
+#if HAVE_V8_REGCOMP
+#include "regexp.h"
+extern int reg_show_error;
+#define DEFINE_PATTERN(name) struct regexp *name
+#define CLEAR_PATTERN(name) name = NULL
+#endif
+
+#if NO_REGEX
+#define DEFINE_PATTERN(name)
+#define CLEAR_PATTERN(name)
+#endif
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Definitions of keys on the PC.
+ * Special (non-ASCII) keys on the PC send a two-byte sequence,
+ * where the first byte is 0 and the second is as defined below.
+ */
+#define PCK_SHIFT_TAB '\017'
+#define PCK_ALT_E '\022'
+#define PCK_CAPS_LOCK '\072'
+#define PCK_F1 '\073'
+#define PCK_NUM_LOCK '\105'
+#define PCK_HOME '\107'
+#define PCK_UP '\110'
+#define PCK_PAGEUP '\111'
+#define PCK_LEFT '\113'
+#define PCK_RIGHT '\115'
+#define PCK_END '\117'
+#define PCK_DOWN '\120'
+#define PCK_PAGEDOWN '\121'
+#define PCK_INSERT '\122'
+#define PCK_DELETE '\123'
+#define PCK_CTL_LEFT '\163'
+#define PCK_CTL_RIGHT '\164'
+#define PCK_CTL_DELETE '\223'
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines dealing with the "position" table.
+ * This is a table which tells the position (in the input file) of the
+ * first char on each currently displayed line.
+ *
+ * {{ The position table is scrolled by moving all the entries.
+ * Would be better to have a circular table
+ * and just change a couple of pointers. }}
+ */
+
+#include "less.h"
+#include "position.h"
+
+static POSITION *table = NULL; /* The position table */
+static int table_size;
+
+extern int sc_width, sc_height;
+
+/*
+ * Return the starting file position of a line displayed on the screen.
+ * The line may be specified as a line number relative to the top
+ * of the screen, but is usually one of these special cases:
+ * the top (first) line on the screen
+ * the second line on the screen
+ * the bottom line on the screen
+ * the line after the bottom line on the screen
+ */
+ public POSITION
+position(where)
+ int where;
+{
+ switch (where)
+ {
+ case BOTTOM:
+ where = sc_height - 2;
+ break;
+ case BOTTOM_PLUS_ONE:
+ where = sc_height - 1;
+ break;
+ case MIDDLE:
+ where = (sc_height - 1) / 2;
+ }
+ return (table[where]);
+}
+
+/*
+ * Add a new file position to the bottom of the position table.
+ */
+ public void
+add_forw_pos(pos)
+ POSITION pos;
+{
+ register int i;
+
+ /*
+ * Scroll the position table up.
+ */
+ for (i = 1; i < sc_height; i++)
+ table[i-1] = table[i];
+ table[sc_height - 1] = pos;
+}
+
+/*
+ * Add a new file position to the top of the position table.
+ */
+ public void
+add_back_pos(pos)
+ POSITION pos;
+{
+ register int i;
+
+ /*
+ * Scroll the position table down.
+ */
+ for (i = sc_height - 1; i > 0; i--)
+ table[i] = table[i-1];
+ table[0] = pos;
+}
+
+/*
+ * Initialize the position table, done whenever we clear the screen.
+ */
+ public void
+pos_clear()
+{
+ register int i;
+
+ for (i = 0; i < sc_height; i++)
+ table[i] = NULL_POSITION;
+}
+
+/*
+ * Allocate or reallocate the position table.
+ */
+ public void
+pos_init()
+{
+ struct scrpos scrpos;
+
+ if (sc_height <= table_size)
+ return;
+ /*
+ * If we already have a table, remember the first line in it
+ * before we free it, so we can copy that line to the new table.
+ */
+ if (table != NULL)
+ {
+ get_scrpos(&scrpos);
+ free((char*)table);
+ } else
+ scrpos.pos = NULL_POSITION;
+ table = (POSITION *) ecalloc(sc_height, sizeof(POSITION));
+ table_size = sc_height;
+ pos_clear();
+ if (scrpos.pos != NULL_POSITION)
+ table[scrpos.ln-1] = scrpos.pos;
+}
+
+/*
+ * See if the byte at a specified position is currently on the screen.
+ * Check the position table to see if the position falls within its range.
+ * Return the position table entry if found, -1 if not.
+ */
+ public int
+onscreen(pos)
+ POSITION pos;
+{
+ register int i;
+
+ if (pos < table[0])
+ return (-1);
+ for (i = 1; i < sc_height; i++)
+ if (pos < table[i])
+ return (i-1);
+ return (-1);
+}
+
+/*
+ * See if the entire screen is empty.
+ */
+ public int
+empty_screen()
+{
+ return (empty_lines(0, sc_height-1));
+}
+
+ public int
+empty_lines(s, e)
+ int s;
+ int e;
+{
+ register int i;
+
+ for (i = s; i <= e; i++)
+ if (table[i] != NULL_POSITION && table[i] != 0)
+ return (0);
+ return (1);
+}
+
+/*
+ * Get the current screen position.
+ * The screen position consists of both a file position and
+ * a screen line number where the file position is placed on the screen.
+ * Normally the screen line number is 0, but if we are positioned
+ * such that the top few lines are empty, we may have to set
+ * the screen line to a number > 0.
+ */
+ public void
+get_scrpos(scrpos)
+ struct scrpos *scrpos;
+{
+ register int i;
+
+ /*
+ * Find the first line on the screen which has something on it,
+ * and return the screen line number and the file position.
+ */
+ for (i = 0; i < sc_height; i++)
+ if (table[i] != NULL_POSITION)
+ {
+ scrpos->ln = i+1;
+ scrpos->pos = table[i];
+ return;
+ }
+ /*
+ * The screen is empty.
+ */
+ scrpos->pos = NULL_POSITION;
+}
+
+/*
+ * Adjust a screen line number to be a simple positive integer
+ * in the range { 0 .. sc_height-2 }.
+ * (The bottom line, sc_height-1, is reserved for prompts, etc.)
+ * The given "sline" may be in the range { 1 .. sc_height-1 }
+ * to refer to lines relative to the top of the screen (starting from 1),
+ * or it may be in { -1 .. -(sc_height-1) } to refer to lines
+ * relative to the bottom of the screen.
+ */
+ public int
+adjsline(sline)
+ int sline;
+{
+ /*
+ * Negative screen line number means
+ * relative to the bottom of the screen.
+ */
+ if (sline < 0)
+ sline += sc_height;
+ /*
+ * Can't be less than 1 or greater than sc_height-1.
+ */
+ if (sline <= 0)
+ sline = 1;
+ if (sline >= sc_height)
+ sline = sc_height - 1;
+ /*
+ * Return zero-based line number, not one-based.
+ */
+ return (sline-1);
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Include file for interfacing to position.c modules.
+ */
+#define TOP (0)
+#define TOP_PLUS_ONE (1)
+#define BOTTOM (-1)
+#define BOTTOM_PLUS_ONE (-2)
+#define MIDDLE (-3)
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Prompting and other messages.
+ * There are three flavors of prompts, SHORT, MEDIUM and LONG,
+ * selected by the -m/-M options.
+ * There is also the "equals message", printed by the = command.
+ * A prompt is a message composed of various pieces, such as the
+ * name of the file being viewed, the percentage into the file, etc.
+ */
+
+#include "less.h"
+#include "position.h"
+
+extern int pr_type;
+extern int new_file;
+extern int sc_width;
+extern int so_s_width, so_e_width;
+extern int linenums;
+extern int hshift;
+extern int sc_height;
+extern int jump_sline;
+extern int less_is_more;
+extern IFILE curr_ifile;
+#if EDITOR
+extern char *editor;
+extern char *editproto;
+#endif
+
+/*
+ * Prototypes for the three flavors of prompts.
+ * These strings are expanded by pr_expand().
+ */
+static constant char s_proto[] =
+ "?n?f%f .?m(%T %i of %m) ..?e(END) ?x- Next\\: %x..%t";
+static constant char m_proto[] =
+ "?n?f%f .?m(%T %i of %m) ..?e(END) ?x- Next\\: %x.:?pB%pB\\%:byte %bB?s/%s...%t";
+static constant char M_proto[] =
+ "?f%f .?n?m(%T %i of %m) ..?ltlines %lt-%lb?L/%L. :byte %bB?s/%s. .?e(END) ?x- Next\\: %x.:?pB%pB\\%..%t";
+static constant char e_proto[] =
+ "?f%f .?m(%T %i of %m) .?ltlines %lt-%lb?L/%L. .byte %bB?s/%s. ?e(END) :?pB%pB\\%..%t";
+static constant char h_proto[] =
+ "HELP -- ?eEND -- Press g to see it again:Press RETURN for more., or q when done";
+static constant char w_proto[] =
+ "Waiting for data";
+static constant char more_proto[] =
+ "--More--(?eEND ?x- Next\\: %x.:?pB%pB\\%:byte %bB?s/%s...%t)";
+
+public char *prproto[3];
+public char constant *eqproto = e_proto;
+public char constant *hproto = h_proto;
+public char constant *wproto = w_proto;
+
+static char message[PROMPT_SIZE];
+static char *mp;
+
+/*
+ * Initialize the prompt prototype strings.
+ */
+ public void
+init_prompt()
+{
+ prproto[0] = save(s_proto);
+ prproto[1] = save(less_is_more ? more_proto : m_proto);
+ prproto[2] = save(M_proto);
+ eqproto = save(e_proto);
+ hproto = save(h_proto);
+ wproto = save(w_proto);
+}
+
+/*
+ * Append a string to the end of the message.
+ */
+ static void
+ap_str(s)
+ char *s;
+{
+ int len;
+
+ len = (int) strlen(s);
+ if (mp + len >= message + PROMPT_SIZE)
+ len = (int) (message + PROMPT_SIZE - mp - 1);
+ strncpy(mp, s, len);
+ mp += len;
+ *mp = '\0';
+}
+
+/*
+ * Append a character to the end of the message.
+ */
+ static void
+ap_char(c)
+ char c;
+{
+ char buf[2];
+
+ buf[0] = c;
+ buf[1] = '\0';
+ ap_str(buf);
+}
+
+/*
+ * Append a POSITION (as a decimal integer) to the end of the message.
+ */
+ static void
+ap_pos(pos)
+ POSITION pos;
+{
+ char buf[INT_STRLEN_BOUND(pos) + 2];
+
+ postoa(pos, buf);
+ ap_str(buf);
+}
+
+/*
+ * Append a line number to the end of the message.
+ */
+ static void
+ap_linenum(linenum)
+ LINENUM linenum;
+{
+ char buf[INT_STRLEN_BOUND(linenum) + 2];
+
+ linenumtoa(linenum, buf);
+ ap_str(buf);
+}
+
+/*
+ * Append an integer to the end of the message.
+ */
+ static void
+ap_int(num)
+ int num;
+{
+ char buf[INT_STRLEN_BOUND(num) + 2];
+
+ inttoa(num, buf);
+ ap_str(buf);
+}
+
+/*
+ * Append a question mark to the end of the message.
+ */
+ static void
+ap_quest()
+{
+ ap_str("?");
+}
+
+/*
+ * Return the "current" byte offset in the file.
+ */
+ static POSITION
+curr_byte(where)
+ int where;
+{
+ POSITION pos;
+
+ pos = position(where);
+ while (pos == NULL_POSITION && where >= 0 && where < sc_height-1)
+ pos = position(++where);
+ if (pos == NULL_POSITION)
+ pos = ch_length();
+ return (pos);
+}
+
+/*
+ * Return the value of a prototype conditional.
+ * A prototype string may include conditionals which consist of a
+ * question mark followed by a single letter.
+ * Here we decode that letter and return the appropriate boolean value.
+ */
+ static int
+cond(c, where)
+ char c;
+ int where;
+{
+ POSITION len;
+
+ switch (c)
+ {
+ case 'a': /* Anything in the message yet? */
+ return (mp > message);
+ case 'b': /* Current byte offset known? */
+ return (curr_byte(where) != NULL_POSITION);
+ case 'c':
+ return (hshift != 0);
+ case 'e': /* At end of file? */
+ return (eof_displayed());
+ case 'f': /* Filename known? */
+ return (strcmp(get_filename(curr_ifile), "-") != 0);
+ case 'l': /* Line number known? */
+ case 'd': /* Same as l */
+ return (linenums);
+ case 'L': /* Final line number known? */
+ case 'D': /* Final page number known? */
+ return (linenums && ch_length() != NULL_POSITION);
+ case 'm': /* More than one file? */
+#if TAGS
+ return (ntags() ? (ntags() > 1) : (nifile() > 1));
+#else
+ return (nifile() > 1);
+#endif
+ case 'n': /* First prompt in a new file? */
+#if TAGS
+ return (ntags() ? 1 : new_file);
+#else
+ return (new_file);
+#endif
+ case 'p': /* Percent into file (bytes) known? */
+ return (curr_byte(where) != NULL_POSITION &&
+ ch_length() > 0);
+ case 'P': /* Percent into file (lines) known? */
+ return (currline(where) != 0 &&
+ (len = ch_length()) > 0 &&
+ find_linenum(len) != 0);
+ case 's': /* Size of file known? */
+ case 'B':
+ return (ch_length() != NULL_POSITION);
+ case 'x': /* Is there a "next" file? */
+#if TAGS
+ if (ntags())
+ return (0);
+#endif
+ return (next_ifile(curr_ifile) != NULL_IFILE);
+ }
+ return (0);
+}
+
+/*
+ * Decode a "percent" prototype character.
+ * A prototype string may include various "percent" escapes;
+ * that is, a percent sign followed by a single letter.
+ * Here we decode that letter and take the appropriate action,
+ * usually by appending something to the message being built.
+ */
+ static void
+protochar(c, where, iseditproto)
+ int c;
+ int where;
+ int iseditproto;
+{
+ POSITION pos;
+ POSITION len;
+ int n;
+ LINENUM linenum;
+ LINENUM last_linenum;
+ IFILE h;
+
+#undef PAGE_NUM
+#define PAGE_NUM(linenum) ((((linenum) - 1) / (sc_height - 1)) + 1)
+
+ switch (c)
+ {
+ case 'b': /* Current byte offset */
+ pos = curr_byte(where);
+ if (pos != NULL_POSITION)
+ ap_pos(pos);
+ else
+ ap_quest();
+ break;
+ case 'c':
+ ap_int(hshift);
+ break;
+ case 'd': /* Current page number */
+ linenum = currline(where);
+ if (linenum > 0 && sc_height > 1)
+ ap_linenum(PAGE_NUM(linenum));
+ else
+ ap_quest();
+ break;
+ case 'D': /* Final page number */
+ /* Find the page number of the last byte in the file (len-1). */
+ len = ch_length();
+ if (len == NULL_POSITION)
+ ap_quest();
+ else if (len == 0)
+ /* An empty file has no pages. */
+ ap_linenum(0);
+ else
+ {
+ linenum = find_linenum(len - 1);
+ if (linenum <= 0)
+ ap_quest();
+ else
+ ap_linenum(PAGE_NUM(linenum));
+ }
+ break;
+#if EDITOR
+ case 'E': /* Editor name */
+ ap_str(editor);
+ break;
+#endif
+ case 'f': /* File name */
+ ap_str(get_filename(curr_ifile));
+ break;
+ case 'F': /* Last component of file name */
+ ap_str(last_component(get_filename(curr_ifile)));
+ break;
+ case 'i': /* Index into list of files */
+#if TAGS
+ if (ntags())
+ ap_int(curr_tag());
+ else
+#endif
+ ap_int(get_index(curr_ifile));
+ break;
+ case 'l': /* Current line number */
+ linenum = currline(where);
+ if (linenum != 0)
+ ap_linenum(linenum);
+ else
+ ap_quest();
+ break;
+ case 'L': /* Final line number */
+ len = ch_length();
+ if (len == NULL_POSITION || len == ch_zero() ||
+ (linenum = find_linenum(len)) <= 0)
+ ap_quest();
+ else
+ ap_linenum(linenum-1);
+ break;
+ case 'm': /* Number of files */
+#if TAGS
+ n = ntags();
+ if (n)
+ ap_int(n);
+ else
+#endif
+ ap_int(nifile());
+ break;
+ case 'p': /* Percent into file (bytes) */
+ pos = curr_byte(where);
+ len = ch_length();
+ if (pos != NULL_POSITION && len > 0)
+ ap_int(percentage(pos,len));
+ else
+ ap_quest();
+ break;
+ case 'P': /* Percent into file (lines) */
+ linenum = currline(where);
+ if (linenum == 0 ||
+ (len = ch_length()) == NULL_POSITION || len == ch_zero() ||
+ (last_linenum = find_linenum(len)) <= 0)
+ ap_quest();
+ else
+ ap_int(percentage(linenum, last_linenum));
+ break;
+ case 's': /* Size of file */
+ case 'B':
+ len = ch_length();
+ if (len != NULL_POSITION)
+ ap_pos(len);
+ else
+ ap_quest();
+ break;
+ case 't': /* Truncate trailing spaces in the message */
+ while (mp > message && mp[-1] == ' ')
+ mp--;
+ *mp = '\0';
+ break;
+ case 'T': /* Type of list */
+#if TAGS
+ if (ntags())
+ ap_str("tag");
+ else
+#endif
+ ap_str("file");
+ break;
+ case 'x': /* Name of next file */
+ h = next_ifile(curr_ifile);
+ if (h != NULL_IFILE)
+ ap_str(get_filename(h));
+ else
+ ap_quest();
+ break;
+ }
+}
+
+/*
+ * Skip a false conditional.
+ * When a false condition is found (either a false IF or the ELSE part
+ * of a true IF), this routine scans the prototype string to decide
+ * where to resume parsing the string.
+ * We must keep track of nested IFs and skip them properly.
+ */
+ static constant char *
+skipcond(p)
+ register constant char *p;
+{
+ register int iflevel;
+
+ /*
+ * We came in here after processing a ? or :,
+ * so we start nested one level deep.
+ */
+ iflevel = 1;
+
+ for (;;) switch (*++p)
+ {
+ case '?':
+ /*
+ * Start of a nested IF.
+ */
+ iflevel++;
+ break;
+ case ':':
+ /*
+ * Else.
+ * If this matches the IF we came in here with,
+ * then we're done.
+ */
+ if (iflevel == 1)
+ return (p);
+ break;
+ case '.':
+ /*
+ * Endif.
+ * If this matches the IF we came in here with,
+ * then we're done.
+ */
+ if (--iflevel == 0)
+ return (p);
+ break;
+ case '\\':
+ /*
+ * Backslash escapes the next character.
+ */
+ ++p;
+ break;
+ case '\0':
+ /*
+ * Whoops. Hit end of string.
+ * This is a malformed conditional, but just treat it
+ * as if all active conditionals ends here.
+ */
+ return (p-1);
+ }
+ /*NOTREACHED*/
+}
+
+/*
+ * Decode a char that represents a position on the screen.
+ */
+ static constant char *
+wherechar(p, wp)
+ char constant *p;
+ int *wp;
+{
+ switch (*p)
+ {
+ case 'b': case 'd': case 'l': case 'p': case 'P':
+ switch (*++p)
+ {
+ case 't': *wp = TOP; break;
+ case 'm': *wp = MIDDLE; break;
+ case 'b': *wp = BOTTOM; break;
+ case 'B': *wp = BOTTOM_PLUS_ONE; break;
+ case 'j': *wp = adjsline(jump_sline); break;
+ default: *wp = TOP; p--; break;
+ }
+ }
+ return (p);
+}
+
+/*
+ * Construct a message based on a prototype string.
+ */
+ public char *
+pr_expand(proto, maxwidth)
+ constant char *proto;
+ int maxwidth;
+{
+ register constant char *p;
+ register int c;
+ int where;
+
+ mp = message;
+
+ if (*proto == '\0')
+ return ("");
+
+ for (p = proto; *p != '\0'; p++)
+ {
+ switch (*p)
+ {
+ default: /* Just put the character in the message */
+ ap_char(*p);
+ break;
+ case '\\': /* Backslash escapes the next character */
+ p++;
+ ap_char(*p);
+ break;
+ case '?': /* Conditional (IF) */
+ if ((c = *++p) == '\0')
+ --p;
+ else
+ {
+ where = 0;
+ p = wherechar(p, &where);
+ if (!cond(c, where))
+ p = skipcond(p);
+ }
+ break;
+ case ':': /* ELSE */
+ p = skipcond(p);
+ break;
+ case '.': /* ENDIF */
+ break;
+ case '%': /* Percent escape */
+ if ((c = *++p) == '\0')
+ --p;
+ else
+ {
+ where = 0;
+ p = wherechar(p, &where);
+ protochar(c, where,
+#if EDITOR
+ (proto == editproto));
+#else
+ 0);
+#endif
+
+ }
+ break;
+ }
+ }
+
+ if (mp == message)
+ return ("");
+ if (maxwidth > 0 && mp >= message + maxwidth)
+ {
+ /*
+ * Message is too long.
+ * Return just the final portion of it.
+ */
+ return (mp - maxwidth);
+ }
+ return (message);
+}
+
+/*
+ * Return a message suitable for printing by the "=" command.
+ */
+ public char *
+eq_message()
+{
+ return (pr_expand(eqproto, 0));
+}
+
+/*
+ * Return a prompt.
+ * This depends on the prompt type (SHORT, MEDIUM, LONG), etc.
+ * If we can't come up with an appropriate prompt, return NULL
+ * and the caller will prompt with a colon.
+ */
+ public char *
+pr_string()
+{
+ char *prompt;
+ int type;
+
+ type = (!less_is_more) ? pr_type : pr_type ? 0 : 1;
+ prompt = pr_expand((ch_getflags() & CH_HELPFILE) ?
+ hproto : prproto[type],
+ sc_width-so_s_width-so_e_width-2);
+ new_file = 0;
+ return (prompt);
+}
+
+/*
+ * Return a message suitable for printing while waiting in the F command.
+ */
+ public char *
+wait_message()
+{
+ return (pr_expand(wproto, sc_width-so_s_width-so_e_width-2));
+}
--- /dev/null
+/*
+ * regcomp and regexec -- regsub and regerror are elsewhere
+ *
+ * Copyright (c) 1986 by University of Toronto.
+ * Written by Henry Spencer. Not derived from licensed software.
+ *
+ * Permission is granted to anyone to use this software for any
+ * purpose on any computer system, and to redistribute it freely,
+ * subject to the following restrictions:
+ *
+ * 1. The author is not responsible for the consequences of use of
+ * this software, no matter how awful, even if they arise
+ * from defects in it.
+ *
+ * 2. The origin of this software must not be misrepresented, either
+ * by explicit claim or by omission.
+ *
+ * 3. Altered versions must be plainly marked as such, and must not
+ * be misrepresented as being the original software.
+ *
+ * Beware that some of this code is subtly aware of the way operator
+ * precedence is structured in regular expressions. Serious changes in
+ * regular-expression syntax might require a total rethink.
+ *
+ * *** NOTE: this code has been altered slightly for use in Tcl. ***
+ * Slightly modified by David MacKenzie to undo most of the changes for TCL.
+ * Added regexec2 with notbol parameter. -- 4/19/99 Mark Nudelman
+ */
+
+#include "less.h"
+#if HAVE_STDIO_H
+#include <stdio.h>
+#endif
+#if HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+#include "regexp.h"
+
+/*
+ * The "internal use only" fields in regexp.h are present to pass info from
+ * compile to execute that permits the execute phase to run lots faster on
+ * simple cases. They are:
+ *
+ * regstart char that must begin a match; '\0' if none obvious
+ * reganch is the match anchored (at beginning-of-line only)?
+ * regmust string (pointer into program) that match must include, or NULL
+ * regmlen length of regmust string
+ *
+ * Regstart and reganch permit very fast decisions on suitable starting points
+ * for a match, cutting down the work a lot. Regmust permits fast rejection
+ * of lines that cannot possibly match. The regmust tests are costly enough
+ * that regcomp() supplies a regmust only if the r.e. contains something
+ * potentially expensive (at present, the only such thing detected is * or +
+ * at the start of the r.e., which can involve a lot of backup). Regmlen is
+ * supplied because the test in regexec() needs it and regcomp() is
+ * computing it anyway.
+ */
+
+/*
+ * Structure for regexp "program". This is essentially a linear encoding
+ * of a nondeterministic finite-state machine (aka syntax charts or
+ * "railroad normal form" in parsing technology). Each node is an opcode
+ * plus a "next" pointer, possibly plus an operand. "Next" pointers of
+ * all nodes except BRANCH implement concatenation; a "next" pointer with
+ * a BRANCH on both ends of it is connecting two alternatives. (Here we
+ * have one of the subtle syntax dependencies: an individual BRANCH (as
+ * opposed to a collection of them) is never concatenated with anything
+ * because of operator precedence.) The operand of some types of node is
+ * a literal string; for others, it is a node leading into a sub-FSM. In
+ * particular, the operand of a BRANCH node is the first node of the branch.
+ * (NB this is *not* a tree structure: the tail of the branch connects
+ * to the thing following the set of BRANCHes.) The opcodes are:
+ */
+
+/* definition number opnd? meaning */
+#undef EOL
+#define END 0 /* no End of program. */
+#define BOL 1 /* no Match "" at beginning of line. */
+#define EOL 2 /* no Match "" at end of line. */
+#define ANY 3 /* no Match any one character. */
+#define ANYOF 4 /* str Match any character in this string. */
+#define ANYBUT 5 /* str Match any character not in this string. */
+#define BRANCH 6 /* node Match this alternative, or the next... */
+#define BACK 7 /* no Match "", "next" ptr points backward. */
+#define EXACTLY 8 /* str Match this string. */
+#define NOTHING 9 /* no Match empty string. */
+#define STAR 10 /* node Match this (simple) thing 0 or more times. */
+#define PLUS 11 /* node Match this (simple) thing 1 or more times. */
+#define OPEN 20 /* no Mark this point in input as start of #n. */
+ /* OPEN+1 is number 1, etc. */
+#define CLOSE 30 /* no Analogous to OPEN. */
+
+/*
+ * Opcode notes:
+ *
+ * BRANCH The set of branches constituting a single choice are hooked
+ * together with their "next" pointers, since precedence prevents
+ * anything being concatenated to any individual branch. The
+ * "next" pointer of the last BRANCH in a choice points to the
+ * thing following the whole choice. This is also where the
+ * final "next" pointer of each individual branch points; each
+ * branch starts with the operand node of a BRANCH node.
+ *
+ * BACK Normal "next" pointers all implicitly point forward; BACK
+ * exists to make loop structures possible.
+ *
+ * STAR,PLUS '?', and complex '*' and '+', are implemented as circular
+ * BRANCH structures using BACK. Simple cases (one character
+ * per match) are implemented with STAR and PLUS for speed
+ * and to minimize recursive plunges.
+ *
+ * OPEN,CLOSE ...are numbered at compile time.
+ */
+
+/*
+ * A node is one char of opcode followed by two chars of "next" pointer.
+ * "Next" pointers are stored as two 8-bit pieces, high order first. The
+ * value is a positive offset from the opcode of the node containing it.
+ * An operand, if any, simply follows the node. (Note that much of the
+ * code generation knows about this implicit relationship.)
+ *
+ * Using two bytes for the "next" pointer is vast overkill for most things,
+ * but allows patterns to get big without disasters.
+ */
+#define OP(p) (*(p))
+#define NEXT(p) (((*((p)+1)&0377)<<8) + (*((p)+2)&0377))
+#define OPERAND(p) ((p) + 3)
+
+/*
+ * See regmagic.h for one further detail of program structure.
+ */
+
+
+/*
+ * Utility definitions.
+ */
+#ifndef CHARBITS
+#define UCHARAT(p) ((int)*(unsigned char *)(p))
+#else
+#define UCHARAT(p) ((int)*(p)&CHARBITS)
+#endif
+
+#define FAIL(m) { regerror(m); return(NULL); }
+#define ISMULT(c) ((c) == '*' || (c) == '+' || (c) == '?')
+#define META "^$.[()|?+*\\"
+
+/*
+ * Flags to be passed up and down.
+ */
+#define HASWIDTH 01 /* Known never to match null string. */
+#define SIMPLE 02 /* Simple enough to be STAR/PLUS operand. */
+#define SPSTART 04 /* Starts with * or +. */
+#define WORST 0 /* Worst case. */
+
+/*
+ * Global work variables for regcomp().
+ */
+static char *regparse; /* Input-scan pointer. */
+static int regnpar; /* () count. */
+static char regdummy;
+static char *regcode; /* Code-emit pointer; ®dummy = don't. */
+static long regsize; /* Code size. */
+
+/*
+ * The first byte of the regexp internal "program" is actually this magic
+ * number; the start node begins in the second byte.
+ */
+#define MAGIC 0234
+
+
+/*
+ * Forward declarations for regcomp()'s friends.
+ */
+#ifndef STATIC
+#define STATIC static
+#endif
+STATIC char *reg();
+STATIC char *regbranch();
+STATIC char *regpiece();
+STATIC char *regatom();
+STATIC char *regnode();
+STATIC char *regnext();
+STATIC void regc();
+STATIC void reginsert();
+STATIC void regtail();
+STATIC void regoptail();
+#ifdef STRCSPN
+STATIC int strcspn();
+#endif
+
+/*
+ - regcomp - compile a regular expression into internal code
+ *
+ * We can't allocate space until we know how big the compiled form will be,
+ * but we can't compile it (and thus know how big it is) until we've got a
+ * place to put the code. So we cheat: we compile it twice, once with code
+ * generation turned off and size counting turned on, and once "for real".
+ * This also means that we don't allocate space until we are sure that the
+ * thing really will compile successfully, and we never have to move the
+ * code and thus invalidate pointers into it. (Note that it has to be in
+ * one piece because free() must be able to free it all.)
+ *
+ * Beware that the optimization-preparation code in here knows about some
+ * of the structure of the compiled regexp.
+ */
+regexp *
+regcomp(exp)
+char *exp;
+{
+ register regexp *r;
+ register char *scan;
+ register char *longest;
+ register int len;
+ int flags;
+
+ if (exp == NULL)
+ FAIL("NULL argument");
+
+ /* First pass: determine size, legality. */
+ regparse = exp;
+ regnpar = 1;
+ regsize = 0L;
+ regcode = ®dummy;
+ regc(MAGIC);
+ if (reg(0, &flags) == NULL)
+ return(NULL);
+
+ /* Small enough for pointer-storage convention? */
+ if (regsize >= 32767L) /* Probably could be 65535L. */
+ FAIL("regexp too big");
+
+ /* Allocate space. */
+ r = (regexp *)malloc(sizeof(regexp) + (unsigned)regsize);
+ if (r == NULL)
+ FAIL("out of space");
+
+ /* Second pass: emit code. */
+ regparse = exp;
+ regnpar = 1;
+ regcode = r->program;
+ regc(MAGIC);
+ if (reg(0, &flags) == NULL)
+ {
+ free(r);
+ return(NULL);
+ }
+
+ /* Dig out information for optimizations. */
+ r->regstart = '\0'; /* Worst-case defaults. */
+ r->reganch = 0;
+ r->regmust = NULL;
+ r->regmlen = 0;
+ scan = r->program+1; /* First BRANCH. */
+ if (OP(regnext(scan)) == END) { /* Only one top-level choice. */
+ scan = OPERAND(scan);
+
+ /* Starting-point info. */
+ if (OP(scan) == EXACTLY)
+ r->regstart = *OPERAND(scan);
+ else if (OP(scan) == BOL)
+ r->reganch++;
+
+ /*
+ * If there's something expensive in the r.e., find the
+ * longest literal string that must appear and make it the
+ * regmust. Resolve ties in favor of later strings, since
+ * the regstart check works with the beginning of the r.e.
+ * and avoiding duplication strengthens checking. Not a
+ * strong reason, but sufficient in the absence of others.
+ */
+ if (flags&SPSTART) {
+ longest = NULL;
+ len = 0;
+ for (; scan != NULL; scan = regnext(scan))
+ if (OP(scan) == EXACTLY && ((int) strlen(OPERAND(scan))) >= len) {
+ longest = OPERAND(scan);
+ len = (int) strlen(OPERAND(scan));
+ }
+ r->regmust = longest;
+ r->regmlen = len;
+ }
+ }
+
+ return(r);
+}
+
+/*
+ - reg - regular expression, i.e. main body or parenthesized thing
+ *
+ * Caller must absorb opening parenthesis.
+ *
+ * Combining parenthesis handling with the base level of regular expression
+ * is a trifle forced, but the need to tie the tails of the branches to what
+ * follows makes it hard to avoid.
+ */
+static char *
+reg(paren, flagp)
+int paren; /* Parenthesized? */
+int *flagp;
+{
+ register char *ret;
+ register char *br;
+ register char *ender;
+ register int parno = 0;
+ int flags;
+
+ *flagp = HASWIDTH; /* Tentatively. */
+
+ /* Make an OPEN node, if parenthesized. */
+ if (paren) {
+ if (regnpar >= NSUBEXP)
+ FAIL("too many ()");
+ parno = regnpar;
+ regnpar++;
+ ret = regnode(OPEN+parno);
+ } else
+ ret = NULL;
+
+ /* Pick up the branches, linking them together. */
+ br = regbranch(&flags);
+ if (br == NULL)
+ return(NULL);
+ if (ret != NULL)
+ regtail(ret, br); /* OPEN -> first. */
+ else
+ ret = br;
+ if (!(flags&HASWIDTH))
+ *flagp &= ~HASWIDTH;
+ *flagp |= flags&SPSTART;
+ while (*regparse == '|') {
+ regparse++;
+ br = regbranch(&flags);
+ if (br == NULL)
+ return(NULL);
+ regtail(ret, br); /* BRANCH -> BRANCH. */
+ if (!(flags&HASWIDTH))
+ *flagp &= ~HASWIDTH;
+ *flagp |= flags&SPSTART;
+ }
+
+ /* Make a closing node, and hook it on the end. */
+ ender = regnode((paren) ? CLOSE+parno : END);
+ regtail(ret, ender);
+
+ /* Hook the tails of the branches to the closing node. */
+ for (br = ret; br != NULL; br = regnext(br))
+ regoptail(br, ender);
+
+ /* Check for proper termination. */
+ if (paren && *regparse++ != ')') {
+ FAIL("unmatched ()");
+ } else if (!paren && *regparse != '\0') {
+ if (*regparse == ')') {
+ FAIL("unmatched ()");
+ } else
+ FAIL("junk on end"); /* "Can't happen". */
+ /* NOTREACHED */
+ }
+
+ return(ret);
+}
+
+/*
+ - regbranch - one alternative of an | operator
+ *
+ * Implements the concatenation operator.
+ */
+static char *
+regbranch(flagp)
+int *flagp;
+{
+ register char *ret;
+ register char *chain;
+ register char *latest;
+ int flags;
+
+ *flagp = WORST; /* Tentatively. */
+
+ ret = regnode(BRANCH);
+ chain = NULL;
+ while (*regparse != '\0' && *regparse != '|' && *regparse != ')') {
+ latest = regpiece(&flags);
+ if (latest == NULL)
+ return(NULL);
+ *flagp |= flags&HASWIDTH;
+ if (chain == NULL) /* First piece. */
+ *flagp |= flags&SPSTART;
+ else
+ regtail(chain, latest);
+ chain = latest;
+ }
+ if (chain == NULL) /* Loop ran zero times. */
+ (void) regnode(NOTHING);
+
+ return(ret);
+}
+
+/*
+ - regpiece - something followed by possible [*+?]
+ *
+ * Note that the branching code sequences used for ? and the general cases
+ * of * and + are somewhat optimized: they use the same NOTHING node as
+ * both the endmarker for their branch list and the body of the last branch.
+ * It might seem that this node could be dispensed with entirely, but the
+ * endmarker role is not redundant.
+ */
+static char *
+regpiece(flagp)
+int *flagp;
+{
+ register char *ret;
+ register char op;
+ register char *next;
+ int flags;
+
+ ret = regatom(&flags);
+ if (ret == NULL)
+ return(NULL);
+
+ op = *regparse;
+ if (!ISMULT(op)) {
+ *flagp = flags;
+ return(ret);
+ }
+
+ if (!(flags&HASWIDTH) && op != '?')
+ FAIL("*+ operand could be empty");
+ *flagp = (op != '+') ? (WORST|SPSTART) : (WORST|HASWIDTH);
+
+ if (op == '*' && (flags&SIMPLE))
+ reginsert(STAR, ret);
+ else if (op == '*') {
+ /* Emit x* as (x&|), where & means "self". */
+ reginsert(BRANCH, ret); /* Either x */
+ regoptail(ret, regnode(BACK)); /* and loop */
+ regoptail(ret, ret); /* back */
+ regtail(ret, regnode(BRANCH)); /* or */
+ regtail(ret, regnode(NOTHING)); /* null. */
+ } else if (op == '+' && (flags&SIMPLE))
+ reginsert(PLUS, ret);
+ else if (op == '+') {
+ /* Emit x+ as x(&|), where & means "self". */
+ next = regnode(BRANCH); /* Either */
+ regtail(ret, next);
+ regtail(regnode(BACK), ret); /* loop back */
+ regtail(next, regnode(BRANCH)); /* or */
+ regtail(ret, regnode(NOTHING)); /* null. */
+ } else if (op == '?') {
+ /* Emit x? as (x|) */
+ reginsert(BRANCH, ret); /* Either x */
+ regtail(ret, regnode(BRANCH)); /* or */
+ next = regnode(NOTHING); /* null. */
+ regtail(ret, next);
+ regoptail(ret, next);
+ }
+ regparse++;
+ if (ISMULT(*regparse))
+ FAIL("nested *?+");
+
+ return(ret);
+}
+
+/*
+ - regatom - the lowest level
+ *
+ * Optimization: gobbles an entire sequence of ordinary characters so that
+ * it can turn them into a single node, which is smaller to store and
+ * faster to run. Backslashed characters are exceptions, each becoming a
+ * separate node; the code is simpler that way and it's not worth fixing.
+ */
+static char *
+regatom(flagp)
+int *flagp;
+{
+ register char *ret;
+ int flags;
+
+ *flagp = WORST; /* Tentatively. */
+
+ switch (*regparse++) {
+ case '^':
+ ret = regnode(BOL);
+ break;
+ case '$':
+ ret = regnode(EOL);
+ break;
+ case '.':
+ ret = regnode(ANY);
+ *flagp |= HASWIDTH|SIMPLE;
+ break;
+ case '[': {
+ register int clss;
+ register int classend;
+
+ if (*regparse == '^') { /* Complement of range. */
+ ret = regnode(ANYBUT);
+ regparse++;
+ } else
+ ret = regnode(ANYOF);
+ if (*regparse == ']' || *regparse == '-')
+ regc(*regparse++);
+ while (*regparse != '\0' && *regparse != ']') {
+ if (*regparse == '-') {
+ regparse++;
+ if (*regparse == ']' || *regparse == '\0')
+ regc('-');
+ else {
+ clss = UCHARAT(regparse-2)+1;
+ classend = UCHARAT(regparse);
+ if (clss > classend+1)
+ FAIL("invalid [] range");
+ for (; clss <= classend; clss++)
+ regc(clss);
+ regparse++;
+ }
+ } else
+ regc(*regparse++);
+ }
+ regc('\0');
+ if (*regparse != ']')
+ FAIL("unmatched []");
+ regparse++;
+ *flagp |= HASWIDTH|SIMPLE;
+ }
+ break;
+ case '(':
+ ret = reg(1, &flags);
+ if (ret == NULL)
+ return(NULL);
+ *flagp |= flags&(HASWIDTH|SPSTART);
+ break;
+ case '\0':
+ case '|':
+ case ')':
+ FAIL("internal urp"); /* Supposed to be caught earlier. */
+ /* NOTREACHED */
+ break;
+ case '?':
+ case '+':
+ case '*':
+ FAIL("?+* follows nothing");
+ /* NOTREACHED */
+ break;
+ case '\\':
+ if (*regparse == '\0')
+ FAIL("trailing \\");
+ ret = regnode(EXACTLY);
+ regc(*regparse++);
+ regc('\0');
+ *flagp |= HASWIDTH|SIMPLE;
+ break;
+ default: {
+ register int len;
+ register char ender;
+
+ regparse--;
+ len = (int) strcspn(regparse, META);
+ if (len <= 0)
+ FAIL("internal disaster");
+ ender = *(regparse+len);
+ if (len > 1 && ISMULT(ender))
+ len--; /* Back off clear of ?+* operand. */
+ *flagp |= HASWIDTH;
+ if (len == 1)
+ *flagp |= SIMPLE;
+ ret = regnode(EXACTLY);
+ while (len > 0) {
+ regc(*regparse++);
+ len--;
+ }
+ regc('\0');
+ }
+ break;
+ }
+
+ return(ret);
+}
+
+/*
+ - regnode - emit a node
+ */
+static char * /* Location. */
+regnode(op)
+char op;
+{
+ register char *ret;
+ register char *ptr;
+
+ ret = regcode;
+ if (ret == ®dummy) {
+ regsize += 3;
+ return(ret);
+ }
+
+ ptr = ret;
+ *ptr++ = op;
+ *ptr++ = '\0'; /* Null "next" pointer. */
+ *ptr++ = '\0';
+ regcode = ptr;
+
+ return(ret);
+}
+
+/*
+ - regc - emit (if appropriate) a byte of code
+ */
+static void
+regc(b)
+char b;
+{
+ if (regcode != ®dummy)
+ *regcode++ = b;
+ else
+ regsize++;
+}
+
+/*
+ - reginsert - insert an operator in front of already-emitted operand
+ *
+ * Means relocating the operand.
+ */
+static void
+reginsert(op, opnd)
+char op;
+char *opnd;
+{
+ register char *src;
+ register char *dst;
+ register char *place;
+
+ if (regcode == ®dummy) {
+ regsize += 3;
+ return;
+ }
+
+ src = regcode;
+ regcode += 3;
+ dst = regcode;
+ while (src > opnd)
+ *--dst = *--src;
+
+ place = opnd; /* Op node, where operand used to be. */
+ *place++ = op;
+ *place++ = '\0';
+ *place++ = '\0';
+}
+
+/*
+ - regtail - set the next-pointer at the end of a node chain
+ */
+static void
+regtail(p, val)
+char *p;
+char *val;
+{
+ register char *scan;
+ register char *temp;
+ register int offset;
+
+ if (p == ®dummy)
+ return;
+
+ /* Find last node. */
+ scan = p;
+ for (;;) {
+ temp = regnext(scan);
+ if (temp == NULL)
+ break;
+ scan = temp;
+ }
+
+ if (OP(scan) == BACK)
+ offset = (int) (scan - val);
+ else
+ offset = (int) (val - scan);
+ *(scan+1) = (offset>>8)&0377;
+ *(scan+2) = offset&0377;
+}
+
+/*
+ - regoptail - regtail on operand of first argument; nop if operandless
+ */
+static void
+regoptail(p, val)
+char *p;
+char *val;
+{
+ /* "Operandless" and "op != BRANCH" are synonymous in practice. */
+ if (p == NULL || p == ®dummy || OP(p) != BRANCH)
+ return;
+ regtail(OPERAND(p), val);
+}
+
+/*
+ * regexec and friends
+ */
+
+/*
+ * Global work variables for regexec().
+ */
+static char *reginput; /* String-input pointer. */
+static char *regbol; /* Beginning of input, for ^ check. */
+static char **regstartp; /* Pointer to startp array. */
+static char **regendp; /* Ditto for endp. */
+
+/*
+ * Forwards.
+ */
+STATIC int regtry();
+STATIC int regmatch();
+STATIC int regrepeat();
+
+#ifdef DEBUG
+int regnarrate = 0;
+void regdump();
+STATIC char *regprop();
+#endif
+
+/*
+ - regexec - match a regexp against a string
+ */
+int
+regexec2(prog, string, notbol)
+register regexp *prog;
+register char *string;
+int notbol;
+{
+ register char *s;
+
+ /* Be paranoid... */
+ if (prog == NULL || string == NULL) {
+ regerror("NULL parameter");
+ return(0);
+ }
+
+ /* Check validity of program. */
+ if (UCHARAT(prog->program) != MAGIC) {
+ regerror("corrupted program");
+ return(0);
+ }
+
+ /* If there is a "must appear" string, look for it. */
+ if (prog->regmust != NULL) {
+ s = string;
+ while ((s = strchr(s, prog->regmust[0])) != NULL) {
+ if (strncmp(s, prog->regmust, prog->regmlen) == 0)
+ break; /* Found it. */
+ s++;
+ }
+ if (s == NULL) /* Not present. */
+ return(0);
+ }
+
+ /* Mark beginning of line for ^ . */
+ if (notbol)
+ regbol = NULL;
+ else
+ regbol = string;
+
+ /* Simplest case: anchored match need be tried only once. */
+ if (prog->reganch)
+ return(regtry(prog, string));
+
+ /* Messy cases: unanchored match. */
+ s = string;
+ if (prog->regstart != '\0')
+ /* We know what char it must start with. */
+ while ((s = strchr(s, prog->regstart)) != NULL) {
+ if (regtry(prog, s))
+ return(1);
+ s++;
+ }
+ else
+ /* We don't -- general case. */
+ do {
+ if (regtry(prog, s))
+ return(1);
+ } while (*s++ != '\0');
+
+ /* Failure. */
+ return(0);
+}
+
+int
+regexec(prog, string)
+register regexp *prog;
+register char *string;
+{
+ return regexec2(prog, string, 0);
+}
+
+/*
+ - regtry - try match at specific point
+ */
+static int /* 0 failure, 1 success */
+regtry(prog, string)
+regexp *prog;
+char *string;
+{
+ register int i;
+ register char **sp;
+ register char **ep;
+
+ reginput = string;
+ regstartp = prog->startp;
+ regendp = prog->endp;
+
+ sp = prog->startp;
+ ep = prog->endp;
+ for (i = NSUBEXP; i > 0; i--) {
+ *sp++ = NULL;
+ *ep++ = NULL;
+ }
+ if (regmatch(prog->program + 1)) {
+ prog->startp[0] = string;
+ prog->endp[0] = reginput;
+ return(1);
+ } else
+ return(0);
+}
+
+/*
+ - regmatch - main matching routine
+ *
+ * Conceptually the strategy is simple: check to see whether the current
+ * node matches, call self recursively to see whether the rest matches,
+ * and then act accordingly. In practice we make some effort to avoid
+ * recursion, in particular by going through "ordinary" nodes (that don't
+ * need to know whether the rest of the match failed) by a loop instead of
+ * by recursion.
+ */
+static int /* 0 failure, 1 success */
+regmatch(prog)
+char *prog;
+{
+ register char *scan; /* Current node. */
+ char *next; /* Next node. */
+
+ scan = prog;
+#ifdef DEBUG
+ if (scan != NULL && regnarrate)
+ fprintf(stderr, "%s(\n", regprop(scan));
+#endif
+ while (scan != NULL) {
+#ifdef DEBUG
+ if (regnarrate)
+ fprintf(stderr, "%s...\n", regprop(scan));
+#endif
+ next = regnext(scan);
+
+ switch (OP(scan)) {
+ case BOL:
+ if (reginput != regbol)
+ return(0);
+ break;
+ case EOL:
+ if (*reginput != '\0')
+ return(0);
+ break;
+ case ANY:
+ if (*reginput == '\0')
+ return(0);
+ reginput++;
+ break;
+ case EXACTLY: {
+ register int len;
+ register char *opnd;
+
+ opnd = OPERAND(scan);
+ /* Inline the first character, for speed. */
+ if (*opnd != *reginput)
+ return(0);
+ len = (int) strlen(opnd);
+ if (len > 1 && strncmp(opnd, reginput, len) != 0)
+ return(0);
+ reginput += len;
+ }
+ break;
+ case ANYOF:
+ if (*reginput == '\0' || strchr(OPERAND(scan), *reginput) == NULL)
+ return(0);
+ reginput++;
+ break;
+ case ANYBUT:
+ if (*reginput == '\0' || strchr(OPERAND(scan), *reginput) != NULL)
+ return(0);
+ reginput++;
+ break;
+ case NOTHING:
+ break;
+ case BACK:
+ break;
+ case OPEN+1:
+ case OPEN+2:
+ case OPEN+3:
+ case OPEN+4:
+ case OPEN+5:
+ case OPEN+6:
+ case OPEN+7:
+ case OPEN+8:
+ case OPEN+9: {
+ register int no;
+ register char *save;
+
+ no = OP(scan) - OPEN;
+ save = reginput;
+
+ if (regmatch(next)) {
+ /*
+ * Don't set startp if some later
+ * invocation of the same parentheses
+ * already has.
+ */
+ if (regstartp[no] == NULL)
+ regstartp[no] = save;
+ return(1);
+ } else
+ return(0);
+ }
+ /* NOTREACHED */
+ break;
+ case CLOSE+1:
+ case CLOSE+2:
+ case CLOSE+3:
+ case CLOSE+4:
+ case CLOSE+5:
+ case CLOSE+6:
+ case CLOSE+7:
+ case CLOSE+8:
+ case CLOSE+9: {
+ register int no;
+ register char *save;
+
+ no = OP(scan) - CLOSE;
+ save = reginput;
+
+ if (regmatch(next)) {
+ /*
+ * Don't set endp if some later
+ * invocation of the same parentheses
+ * already has.
+ */
+ if (regendp[no] == NULL)
+ regendp[no] = save;
+ return(1);
+ } else
+ return(0);
+ }
+ /* NOTREACHED */
+ break;
+ case BRANCH: {
+ register char *save;
+
+ if (OP(next) != BRANCH) /* No choice. */
+ next = OPERAND(scan); /* Avoid recursion. */
+ else {
+ do {
+ save = reginput;
+ if (regmatch(OPERAND(scan)))
+ return(1);
+ reginput = save;
+ scan = regnext(scan);
+ } while (scan != NULL && OP(scan) == BRANCH);
+ return(0);
+ /* NOTREACHED */
+ }
+ }
+ /* NOTREACHED */
+ break;
+ case STAR:
+ case PLUS: {
+ register char nextch;
+ register int no;
+ register char *save;
+ register int min;
+
+ /*
+ * Lookahead to avoid useless match attempts
+ * when we know what character comes next.
+ */
+ nextch = '\0';
+ if (OP(next) == EXACTLY)
+ nextch = *OPERAND(next);
+ min = (OP(scan) == STAR) ? 0 : 1;
+ save = reginput;
+ no = regrepeat(OPERAND(scan));
+ while (no >= min) {
+ /* If it could work, try it. */
+ if (nextch == '\0' || *reginput == nextch)
+ if (regmatch(next))
+ return(1);
+ /* Couldn't or didn't -- back up. */
+ no--;
+ reginput = save + no;
+ }
+ return(0);
+ }
+ /* NOTREACHED */
+ break;
+ case END:
+ return(1); /* Success! */
+ /* NOTREACHED */
+ break;
+ default:
+ regerror("memory corruption");
+ return(0);
+ /* NOTREACHED */
+ break;
+ }
+
+ scan = next;
+ }
+
+ /*
+ * We get here only if there's trouble -- normally "case END" is
+ * the terminating point.
+ */
+ regerror("corrupted pointers");
+ return(0);
+}
+
+/*
+ - regrepeat - repeatedly match something simple, report how many
+ */
+static int
+regrepeat(p)
+char *p;
+{
+ register int count = 0;
+ register char *scan;
+ register char *opnd;
+
+ scan = reginput;
+ opnd = OPERAND(p);
+ switch (OP(p)) {
+ case ANY:
+ count = (int) strlen(scan);
+ scan += count;
+ break;
+ case EXACTLY:
+ while (*opnd == *scan) {
+ count++;
+ scan++;
+ }
+ break;
+ case ANYOF:
+ while (*scan != '\0' && strchr(opnd, *scan) != NULL) {
+ count++;
+ scan++;
+ }
+ break;
+ case ANYBUT:
+ while (*scan != '\0' && strchr(opnd, *scan) == NULL) {
+ count++;
+ scan++;
+ }
+ break;
+ default: /* Oh dear. Called inappropriately. */
+ regerror("internal foulup");
+ count = 0; /* Best compromise. */
+ break;
+ }
+ reginput = scan;
+
+ return(count);
+}
+
+/*
+ - regnext - dig the "next" pointer out of a node
+ */
+static char *
+regnext(p)
+register char *p;
+{
+ register int offset;
+
+ if (p == ®dummy)
+ return(NULL);
+
+ offset = NEXT(p);
+ if (offset == 0)
+ return(NULL);
+
+ if (OP(p) == BACK)
+ return(p-offset);
+ else
+ return(p+offset);
+}
+
+#ifdef DEBUG
+
+STATIC char *regprop();
+
+/*
+ - regdump - dump a regexp onto stdout in vaguely comprehensible form
+ */
+void
+regdump(r)
+regexp *r;
+{
+ register char *s;
+ register char op = EXACTLY; /* Arbitrary non-END op. */
+ register char *next;
+
+
+ s = r->program + 1;
+ while (op != END) { /* While that wasn't END last time... */
+ op = OP(s);
+ printf("%2d%s", s-r->program, regprop(s)); /* Where, what. */
+ next = regnext(s);
+ if (next == NULL) /* Next ptr. */
+ printf("(0)");
+ else
+ printf("(%d)", (s-r->program)+(next-s));
+ s += 3;
+ if (op == ANYOF || op == ANYBUT || op == EXACTLY) {
+ /* Literal string, where present. */
+ while (*s != '\0') {
+ putchar(*s);
+ s++;
+ }
+ s++;
+ }
+ putchar('\n');
+ }
+
+ /* Header fields of interest. */
+ if (r->regstart != '\0')
+ printf("start `%c' ", r->regstart);
+ if (r->reganch)
+ printf("anchored ");
+ if (r->regmust != NULL)
+ printf("must have \"%s\"", r->regmust);
+ printf("\n");
+}
+
+/*
+ - regprop - printable representation of opcode
+ */
+static char *
+regprop(op)
+char *op;
+{
+ register char *p;
+ static char buf[50];
+
+ (void) strcpy(buf, ":");
+
+ switch (OP(op)) {
+ case BOL:
+ p = "BOL";
+ break;
+ case EOL:
+ p = "EOL";
+ break;
+ case ANY:
+ p = "ANY";
+ break;
+ case ANYOF:
+ p = "ANYOF";
+ break;
+ case ANYBUT:
+ p = "ANYBUT";
+ break;
+ case BRANCH:
+ p = "BRANCH";
+ break;
+ case EXACTLY:
+ p = "EXACTLY";
+ break;
+ case NOTHING:
+ p = "NOTHING";
+ break;
+ case BACK:
+ p = "BACK";
+ break;
+ case END:
+ p = "END";
+ break;
+ case OPEN+1:
+ case OPEN+2:
+ case OPEN+3:
+ case OPEN+4:
+ case OPEN+5:
+ case OPEN+6:
+ case OPEN+7:
+ case OPEN+8:
+ case OPEN+9:
+ sprintf(buf+strlen(buf), "OPEN%d", OP(op)-OPEN);
+ p = NULL;
+ break;
+ case CLOSE+1:
+ case CLOSE+2:
+ case CLOSE+3:
+ case CLOSE+4:
+ case CLOSE+5:
+ case CLOSE+6:
+ case CLOSE+7:
+ case CLOSE+8:
+ case CLOSE+9:
+ sprintf(buf+strlen(buf), "CLOSE%d", OP(op)-CLOSE);
+ p = NULL;
+ break;
+ case STAR:
+ p = "STAR";
+ break;
+ case PLUS:
+ p = "PLUS";
+ break;
+ default:
+ regerror("corrupted opcode");
+ break;
+ }
+ if (p != NULL)
+ (void) strcat(buf, p);
+ return(buf);
+}
+#endif
+
+/*
+ * The following is provided for those people who do not have strcspn() in
+ * their C libraries. They should get off their butts and do something
+ * about it; at least one public-domain implementation of those (highly
+ * useful) string routines has been published on Usenet.
+ */
+#ifdef STRCSPN
+/*
+ * strcspn - find length of initial segment of s1 consisting entirely
+ * of characters not from s2
+ */
+
+static int
+strcspn(s1, s2)
+char *s1;
+char *s2;
+{
+ register char *scan1;
+ register char *scan2;
+ register int count;
+
+ count = 0;
+ for (scan1 = s1; *scan1 != '\0'; scan1++) {
+ for (scan2 = s2; *scan2 != '\0';) /* ++ moved down. */
+ if (*scan1 == *scan2++)
+ return(count);
+ count++;
+ }
+ return(count);
+}
+#endif
--- /dev/null
+/*
+ * Definitions etc. for regexp(3) routines.
+ *
+ * Caveat: this is V8 regexp(3) [actually, a reimplementation thereof],
+ * not the System V one.
+ */
+
+#ifndef _REGEXP
+#define _REGEXP 1
+
+#define NSUBEXP 10
+typedef struct regexp {
+ char *startp[NSUBEXP];
+ char *endp[NSUBEXP];
+ char regstart; /* Internal use only. */
+ char reganch; /* Internal use only. */
+ char *regmust; /* Internal use only. */
+ int regmlen; /* Internal use only. */
+ char program[1]; /* Unwarranted chumminess with compiler. */
+} regexp;
+
+#if defined(__STDC__) || defined(__cplusplus)
+# define _ANSI_ARGS_(x) x
+#else
+# define _ANSI_ARGS_(x) ()
+#endif
+
+extern regexp *regcomp _ANSI_ARGS_((char *exp));
+extern int regexec _ANSI_ARGS_((regexp *prog, char *string));
+extern int regexec2 _ANSI_ARGS_((regexp *prog, char *string, int notbol));
+extern void regsub _ANSI_ARGS_((regexp *prog, char *source, char *dest));
+extern void regerror _ANSI_ARGS_((char *msg));
+
+#endif /* REGEXP */
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines which deal with the characteristics of the terminal.
+ * Uses termcap to be as terminal-independent as possible.
+ */
+
+#include "less.h"
+#include "cmd.h"
+
+#if MSDOS_COMPILER
+#include "pckeys.h"
+#if MSDOS_COMPILER==MSOFTC
+#include <graph.h>
+#else
+#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+#include <conio.h>
+#if MSDOS_COMPILER==DJGPPC
+#include <pc.h>
+extern int fd0;
+#endif
+#else
+#if MSDOS_COMPILER==WIN32C
+#include <windows.h>
+#endif
+#endif
+#endif
+#include <time.h>
+
+#else
+
+#if HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
+#include <termios.h>
+#else
+#if HAVE_TERMIO_H
+#include <termio.h>
+#else
+#if HAVE_SGSTAT_H
+#include <sgstat.h>
+#else
+#include <sgtty.h>
+#endif
+#endif
+#endif
+
+#if HAVE_TERMCAP_H
+#include <termcap.h>
+#endif
+#ifdef _OSK
+#include <signal.h>
+#endif
+#if OS2
+#include <sys/signal.h>
+#include "pckeys.h"
+#endif
+#if HAVE_SYS_STREAM_H
+#include <sys/stream.h>
+#endif
+#if HAVE_SYS_PTEM_H
+#include <sys/ptem.h>
+#endif
+
+#endif /* MSDOS_COMPILER */
+
+/*
+ * Check for broken termios package that forces you to manually
+ * set the line discipline.
+ */
+#ifdef __ultrix__
+#define MUST_SET_LINE_DISCIPLINE 1
+#else
+#define MUST_SET_LINE_DISCIPLINE 0
+#endif
+
+#if OS2
+#define DEFAULT_TERM "ansi"
+static char *windowid;
+#else
+#define DEFAULT_TERM "unknown"
+#endif
+
+#if MSDOS_COMPILER==MSOFTC
+static int videopages;
+static long msec_loops;
+static int flash_created = 0;
+#define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); }
+#endif
+
+#if MSDOS_COMPILER==BORLANDC
+static unsigned short *whitescreen;
+static int flash_created = 0;
+#endif
+#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+#define _settextposition(y,x) gotoxy(x,y)
+#define _clearscreen(m) clrscr()
+#define _outtext(s) cputs(s)
+#define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); }
+extern int sc_height;
+#endif
+
+#if MSDOS_COMPILER==WIN32C
+struct keyRecord
+{
+ int ascii;
+ int scan;
+} currentKey;
+
+static int keyCount = 0;
+static WORD curr_attr;
+static int pending_scancode = 0;
+static WORD *whitescreen;
+
+static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */
+static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */
+HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */
+
+extern int quitting;
+static void win32_init_term();
+static void win32_deinit_term();
+
+#define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
+#define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
+#define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4)))
+#define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \
+ if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
+ error("SETCOLORS failed"); }
+#endif
+
+#if MSDOS_COMPILER
+public int nm_fg_color; /* Color of normal text */
+public int nm_bg_color;
+public int bo_fg_color; /* Color of bold text */
+public int bo_bg_color;
+public int ul_fg_color; /* Color of underlined text */
+public int ul_bg_color;
+public int so_fg_color; /* Color of standout text */
+public int so_bg_color;
+public int bl_fg_color; /* Color of blinking text */
+public int bl_bg_color;
+static int sy_fg_color; /* Color of system text (before less) */
+static int sy_bg_color;
+
+#else
+
+/*
+ * Strings passed to tputs() to do various terminal functions.
+ */
+static char
+ *sc_pad, /* Pad string */
+ *sc_home, /* Cursor home */
+ *sc_addline, /* Add line, scroll down following lines */
+ *sc_lower_left, /* Cursor to last line, first column */
+ *sc_return, /* Cursor to beginning of current line */
+ *sc_move, /* General cursor positioning */
+ *sc_clear, /* Clear screen */
+ *sc_eol_clear, /* Clear to end of line */
+ *sc_eos_clear, /* Clear to end of screen */
+ *sc_s_in, /* Enter standout (highlighted) mode */
+ *sc_s_out, /* Exit standout mode */
+ *sc_u_in, /* Enter underline mode */
+ *sc_u_out, /* Exit underline mode */
+ *sc_b_in, /* Enter bold mode */
+ *sc_b_out, /* Exit bold mode */
+ *sc_bl_in, /* Enter blink mode */
+ *sc_bl_out, /* Exit blink mode */
+ *sc_visual_bell, /* Visual bell (flash screen) sequence */
+ *sc_backspace, /* Backspace cursor */
+ *sc_s_keypad, /* Start keypad mode */
+ *sc_e_keypad, /* End keypad mode */
+ *sc_init, /* Startup terminal initialization */
+ *sc_deinit; /* Exit terminal de-initialization */
+#endif
+
+static int init_done = 0;
+
+public int auto_wrap; /* Terminal does \r\n when write past margin */
+public int ignaw; /* Terminal ignores \n immediately after wrap */
+public int erase_char; /* The user's erase char */
+public int erase2_char; /* The user's other erase char */
+public int kill_char; /* The user's line-kill char */
+public int werase_char; /* The user's word-erase char */
+public int sc_width, sc_height; /* Height & width of screen */
+public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
+public int ul_s_width, ul_e_width; /* Printing width of underline seq */
+public int so_s_width, so_e_width; /* Printing width of standout seq */
+public int bl_s_width, bl_e_width; /* Printing width of blink seq */
+public int above_mem, below_mem; /* Memory retained above/below screen */
+public int can_goto_line; /* Can move cursor to any line */
+public int clear_bg; /* Clear fills with background color */
+public int missing_cap = 0; /* Some capability is missing */
+
+static int attrmode = AT_NORMAL;
+extern int binattr;
+
+#if !MSDOS_COMPILER
+static char *cheaper();
+static void tmodes();
+#endif
+
+/*
+ * These two variables are sometimes defined in,
+ * and needed by, the termcap library.
+ */
+#if MUST_DEFINE_OSPEED
+extern short ospeed; /* Terminal output baud rate */
+extern char PC; /* Pad character */
+#endif
+#ifdef _OSK
+short ospeed;
+char PC_, *UP, *BC;
+#endif
+
+extern int quiet; /* If VERY_QUIET, use visual bell for bell */
+extern int no_back_scroll;
+extern int swindow;
+extern int no_init;
+extern int no_keypad;
+extern int sigs;
+extern int wscroll;
+extern int screen_trashed;
+extern int tty;
+extern int top_scroll;
+extern int oldbot;
+#if HILITE_SEARCH
+extern int hilite_search;
+#endif
+
+extern char *tgetstr();
+extern char *tgoto();
+
+
+/*
+ * Change terminal to "raw mode", or restore to "normal" mode.
+ * "Raw mode" means
+ * 1. An outstanding read will complete on receipt of a single keystroke.
+ * 2. Input is not echoed.
+ * 3. On output, \n is mapped to \r\n.
+ * 4. \t is NOT expanded into spaces.
+ * 5. Signal-causing characters such as ctrl-C (interrupt),
+ * etc. are NOT disabled.
+ * It doesn't matter whether an input \n is mapped to \r, or vice versa.
+ */
+ public void
+raw_mode(on)
+ int on;
+{
+ static int curr_on = 0;
+
+ if (on == curr_on)
+ return;
+ erase2_char = '\b'; /* in case OS doesn't know about erase2 */
+#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
+ {
+ struct termios s;
+ static struct termios save_term;
+ static int saved_term = 0;
+
+ if (on)
+ {
+ /*
+ * Get terminal modes.
+ */
+ tcgetattr(tty, &s);
+
+ /*
+ * Save modes and set certain variables dependent on modes.
+ */
+ if (!saved_term)
+ {
+ save_term = s;
+ saved_term = 1;
+ }
+#if HAVE_OSPEED
+ switch (cfgetospeed(&s))
+ {
+#ifdef B0
+ case B0: ospeed = 0; break;
+#endif
+#ifdef B50
+ case B50: ospeed = 1; break;
+#endif
+#ifdef B75
+ case B75: ospeed = 2; break;
+#endif
+#ifdef B110
+ case B110: ospeed = 3; break;
+#endif
+#ifdef B134
+ case B134: ospeed = 4; break;
+#endif
+#ifdef B150
+ case B150: ospeed = 5; break;
+#endif
+#ifdef B200
+ case B200: ospeed = 6; break;
+#endif
+#ifdef B300
+ case B300: ospeed = 7; break;
+#endif
+#ifdef B600
+ case B600: ospeed = 8; break;
+#endif
+#ifdef B1200
+ case B1200: ospeed = 9; break;
+#endif
+#ifdef B1800
+ case B1800: ospeed = 10; break;
+#endif
+#ifdef B2400
+ case B2400: ospeed = 11; break;
+#endif
+#ifdef B4800
+ case B4800: ospeed = 12; break;
+#endif
+#ifdef B9600
+ case B9600: ospeed = 13; break;
+#endif
+#ifdef EXTA
+ case EXTA: ospeed = 14; break;
+#endif
+#ifdef EXTB
+ case EXTB: ospeed = 15; break;
+#endif
+#ifdef B57600
+ case B57600: ospeed = 16; break;
+#endif
+#ifdef B115200
+ case B115200: ospeed = 17; break;
+#endif
+ default: ;
+ }
+#endif
+ erase_char = s.c_cc[VERASE];
+#ifdef VERASE2
+ erase2_char = s.c_cc[VERASE2];
+#endif
+ kill_char = s.c_cc[VKILL];
+#ifdef VWERASE
+ werase_char = s.c_cc[VWERASE];
+#else
+ werase_char = CONTROL('W');
+#endif
+
+ /*
+ * Set the modes to the way we want them.
+ */
+ s.c_lflag &= ~(0
+#ifdef ICANON
+ | ICANON
+#endif
+#ifdef ECHO
+ | ECHO
+#endif
+#ifdef ECHOE
+ | ECHOE
+#endif
+#ifdef ECHOK
+ | ECHOK
+#endif
+#if ECHONL
+ | ECHONL
+#endif
+ );
+
+ s.c_oflag |= (0
+#ifdef OXTABS
+ | OXTABS
+#else
+#ifdef TAB3
+ | TAB3
+#else
+#ifdef XTABS
+ | XTABS
+#endif
+#endif
+#endif
+#ifdef OPOST
+ | OPOST
+#endif
+#ifdef ONLCR
+ | ONLCR
+#endif
+ );
+
+ s.c_oflag &= ~(0
+#ifdef ONOEOT
+ | ONOEOT
+#endif
+#ifdef OCRNL
+ | OCRNL
+#endif
+#ifdef ONOCR
+ | ONOCR
+#endif
+#ifdef ONLRET
+ | ONLRET
+#endif
+ );
+ s.c_cc[VMIN] = 1;
+ s.c_cc[VTIME] = 0;
+#ifdef VLNEXT
+ s.c_cc[VLNEXT] = 0;
+#endif
+#ifdef VDSUSP
+ s.c_cc[VDSUSP] = 0;
+#endif
+#if MUST_SET_LINE_DISCIPLINE
+ /*
+ * System's termios is broken; need to explicitly
+ * request TERMIODISC line discipline.
+ */
+ s.c_line = TERMIODISC;
+#endif
+ } else
+ {
+ /*
+ * Restore saved modes.
+ */
+ s = save_term;
+ }
+#if HAVE_FSYNC
+ fsync(tty);
+#endif
+ tcsetattr(tty, TCSADRAIN, &s);
+#if MUST_SET_LINE_DISCIPLINE
+ if (!on)
+ {
+ /*
+ * Broken termios *ignores* any line discipline
+ * except TERMIODISC. A different old line discipline
+ * is therefore not restored, yet. Restore the old
+ * line discipline by hand.
+ */
+ ioctl(tty, TIOCSETD, &save_term.c_line);
+ }
+#endif
+ }
+#else
+#ifdef TCGETA
+ {
+ struct termio s;
+ static struct termio save_term;
+ static int saved_term = 0;
+
+ if (on)
+ {
+ /*
+ * Get terminal modes.
+ */
+ ioctl(tty, TCGETA, &s);
+
+ /*
+ * Save modes and set certain variables dependent on modes.
+ */
+ if (!saved_term)
+ {
+ save_term = s;
+ saved_term = 1;
+ }
+#if HAVE_OSPEED
+ ospeed = s.c_cflag & CBAUD;
+#endif
+ erase_char = s.c_cc[VERASE];
+ kill_char = s.c_cc[VKILL];
+#ifdef VWERASE
+ werase_char = s.c_cc[VWERASE];
+#else
+ werase_char = CONTROL('W');
+#endif
+
+ /*
+ * Set the modes to the way we want them.
+ */
+ s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
+ s.c_oflag |= (OPOST|ONLCR|TAB3);
+ s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
+ s.c_cc[VMIN] = 1;
+ s.c_cc[VTIME] = 0;
+ } else
+ {
+ /*
+ * Restore saved modes.
+ */
+ s = save_term;
+ }
+ ioctl(tty, TCSETAW, &s);
+ }
+#else
+#ifdef TIOCGETP
+ {
+ struct sgttyb s;
+ static struct sgttyb save_term;
+ static int saved_term = 0;
+
+ if (on)
+ {
+ /*
+ * Get terminal modes.
+ */
+ ioctl(tty, TIOCGETP, &s);
+
+ /*
+ * Save modes and set certain variables dependent on modes.
+ */
+ if (!saved_term)
+ {
+ save_term = s;
+ saved_term = 1;
+ }
+#if HAVE_OSPEED
+ ospeed = s.sg_ospeed;
+#endif
+ erase_char = s.sg_erase;
+ kill_char = s.sg_kill;
+ werase_char = CONTROL('W');
+
+ /*
+ * Set the modes to the way we want them.
+ */
+ s.sg_flags |= CBREAK;
+ s.sg_flags &= ~(ECHO|XTABS);
+ } else
+ {
+ /*
+ * Restore saved modes.
+ */
+ s = save_term;
+ }
+ ioctl(tty, TIOCSETN, &s);
+ }
+#else
+#ifdef _OSK
+ {
+ struct sgbuf s;
+ static struct sgbuf save_term;
+ static int saved_term = 0;
+
+ if (on)
+ {
+ /*
+ * Get terminal modes.
+ */
+ _gs_opt(tty, &s);
+
+ /*
+ * Save modes and set certain variables dependent on modes.
+ */
+ if (!saved_term)
+ {
+ save_term = s;
+ saved_term = 1;
+ }
+ erase_char = s.sg_bspch;
+ kill_char = s.sg_dlnch;
+ werase_char = CONTROL('W');
+
+ /*
+ * Set the modes to the way we want them.
+ */
+ s.sg_echo = 0;
+ s.sg_eofch = 0;
+ s.sg_pause = 0;
+ s.sg_psch = 0;
+ } else
+ {
+ /*
+ * Restore saved modes.
+ */
+ s = save_term;
+ }
+ _ss_opt(tty, &s);
+ }
+#else
+ /* MS-DOS, Windows, or OS2 */
+#if OS2
+ /* OS2 */
+ LSIGNAL(SIGINT, SIG_IGN);
+#endif
+ erase_char = '\b';
+#if MSDOS_COMPILER==DJGPPC
+ kill_char = CONTROL('U');
+ /*
+ * So that when we shell out or run another program, its
+ * stdin is in cooked mode. We do not switch stdin to binary
+ * mode if fd0 is zero, since that means we were called before
+ * tty was reopened in open_getchr, in which case we would be
+ * changing the original stdin device outside less.
+ */
+ if (fd0 != 0)
+ setmode(0, on ? O_BINARY : O_TEXT);
+#else
+ kill_char = ESC;
+#endif
+ werase_char = CONTROL('W');
+#endif
+#endif
+#endif
+#endif
+ curr_on = on;
+}
+
+#if !MSDOS_COMPILER
+/*
+ * Some glue to prevent calling termcap functions if tgetent() failed.
+ */
+static int hardcopy;
+
+ static char *
+ltget_env(capname)
+ char *capname;
+{
+ char name[16];
+ char *s;
+
+ s = lgetenv("LESS_TERMCAP_DEBUG");
+ if (s != NULL && *s != '\0')
+ {
+ struct env { struct env *next; char *name; char *value; };
+ static struct env *envs = NULL;
+ struct env *p;
+ for (p = envs; p != NULL; p = p->next)
+ if (strcmp(p->name, capname) == 0)
+ return p->value;
+ p = (struct env *) ecalloc(1, sizeof(struct env));
+ p->name = save(capname);
+ p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char));
+ sprintf(p->value, "<%s>", capname);
+ p->next = envs;
+ envs = p;
+ return p->value;
+ }
+ strcpy(name, "LESS_TERMCAP_");
+ strcat(name, capname);
+ return (lgetenv(name));
+}
+
+ static int
+ltgetflag(capname)
+ char *capname;
+{
+ char *s;
+
+ if ((s = ltget_env(capname)) != NULL)
+ return (*s != '\0' && *s != '0');
+ if (hardcopy)
+ return (0);
+ return (tgetflag(capname));
+}
+
+ static int
+ltgetnum(capname)
+ char *capname;
+{
+ char *s;
+
+ if ((s = ltget_env(capname)) != NULL)
+ return (atoi(s));
+ if (hardcopy)
+ return (-1);
+ return (tgetnum(capname));
+}
+
+ static char *
+ltgetstr(capname, pp)
+ char *capname;
+ char **pp;
+{
+ char *s;
+
+ if ((s = ltget_env(capname)) != NULL)
+ return (s);
+ if (hardcopy)
+ return (NULL);
+ return (tgetstr(capname, pp));
+}
+#endif /* MSDOS_COMPILER */
+
+/*
+ * Get size of the output screen.
+ */
+ public void
+scrsize()
+{
+ register char *s;
+ int sys_height;
+ int sys_width;
+#if !MSDOS_COMPILER
+ int n;
+#endif
+
+#define DEF_SC_WIDTH 80
+#if MSDOS_COMPILER
+#define DEF_SC_HEIGHT 25
+#else
+#define DEF_SC_HEIGHT 24
+#endif
+
+
+ sys_width = sys_height = 0;
+
+#if MSDOS_COMPILER==MSOFTC
+ {
+ struct videoconfig w;
+ _getvideoconfig(&w);
+ sys_height = w.numtextrows;
+ sys_width = w.numtextcols;
+ }
+#else
+#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+ {
+ struct text_info w;
+ gettextinfo(&w);
+ sys_height = w.screenheight;
+ sys_width = w.screenwidth;
+ }
+#else
+#if MSDOS_COMPILER==WIN32C
+ {
+ CONSOLE_SCREEN_BUFFER_INFO scr;
+ GetConsoleScreenBufferInfo(con_out, &scr);
+ sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
+ sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
+ }
+#else
+#if OS2
+ {
+ int s[2];
+ _scrsize(s);
+ sys_width = s[0];
+ sys_height = s[1];
+ /*
+ * When using terminal emulators for XFree86/OS2, the
+ * _scrsize function does not work well.
+ * Call the scrsize.exe program to get the window size.
+ */
+ windowid = getenv("WINDOWID");
+ if (windowid != NULL)
+ {
+ FILE *fd = popen("scrsize", "rt");
+ if (fd != NULL)
+ {
+ int w, h;
+ fscanf(fd, "%i %i", &w, &h);
+ if (w > 0 && h > 0)
+ {
+ sys_width = w;
+ sys_height = h;
+ }
+ pclose(fd);
+ }
+ }
+ }
+#else
+#ifdef TIOCGWINSZ
+ {
+ struct winsize w;
+ if (ioctl(2, TIOCGWINSZ, &w) == 0)
+ {
+ if (w.ws_row > 0)
+ sys_height = w.ws_row;
+ if (w.ws_col > 0)
+ sys_width = w.ws_col;
+ }
+ }
+#else
+#ifdef WIOCGETD
+ {
+ struct uwdata w;
+ if (ioctl(2, WIOCGETD, &w) == 0)
+ {
+ if (w.uw_height > 0)
+ sys_height = w.uw_height / w.uw_vs;
+ if (w.uw_width > 0)
+ sys_width = w.uw_width / w.uw_hs;
+ }
+ }
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+
+ if (sys_height > 0)
+ sc_height = sys_height;
+ else if ((s = lgetenv("LINES")) != NULL)
+ sc_height = atoi(s);
+#if !MSDOS_COMPILER
+ else if ((n = ltgetnum("li")) > 0)
+ sc_height = n;
+#endif
+ if (sc_height <= 0)
+ sc_height = DEF_SC_HEIGHT;
+
+ if (sys_width > 0)
+ sc_width = sys_width;
+ else if ((s = lgetenv("COLUMNS")) != NULL)
+ sc_width = atoi(s);
+#if !MSDOS_COMPILER
+ else if ((n = ltgetnum("co")) > 0)
+ sc_width = n;
+#endif
+ if (sc_width <= 0)
+ sc_width = DEF_SC_WIDTH;
+}
+
+#if MSDOS_COMPILER==MSOFTC
+/*
+ * Figure out how many empty loops it takes to delay a millisecond.
+ */
+ static void
+get_clock()
+{
+ clock_t start;
+
+ /*
+ * Get synchronized at the start of a tick.
+ */
+ start = clock();
+ while (clock() == start)
+ ;
+ /*
+ * Now count loops till the next tick.
+ */
+ start = clock();
+ msec_loops = 0;
+ while (clock() == start)
+ msec_loops++;
+ /*
+ * Convert from (loops per clock) to (loops per millisecond).
+ */
+ msec_loops *= CLOCKS_PER_SEC;
+ msec_loops /= 1000;
+}
+
+/*
+ * Delay for a specified number of milliseconds.
+ */
+ static void
+dummy_func()
+{
+ static long delay_dummy = 0;
+ delay_dummy++;
+}
+
+ static void
+delay(msec)
+ int msec;
+{
+ long i;
+
+ while (msec-- > 0)
+ {
+ for (i = 0; i < msec_loops; i++)
+ {
+ /*
+ * Make it look like we're doing something here,
+ * so the optimizer doesn't remove the whole loop.
+ */
+ dummy_func();
+ }
+ }
+}
+#endif
+
+/*
+ * Return the characters actually input by a "special" key.
+ */
+ public char *
+special_key_str(key)
+ int key;
+{
+ static char tbuf[40];
+ char *s;
+#if MSDOS_COMPILER || OS2
+ static char k_right[] = { '\340', PCK_RIGHT, 0 };
+ static char k_left[] = { '\340', PCK_LEFT, 0 };
+ static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
+ static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
+ static char k_insert[] = { '\340', PCK_INSERT, 0 };
+ static char k_delete[] = { '\340', PCK_DELETE, 0 };
+ static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
+ static char k_ctl_backspace[] = { '\177', 0 };
+ static char k_home[] = { '\340', PCK_HOME, 0 };
+ static char k_end[] = { '\340', PCK_END, 0 };
+ static char k_up[] = { '\340', PCK_UP, 0 };
+ static char k_down[] = { '\340', PCK_DOWN, 0 };
+ static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
+ static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
+ static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
+ static char k_f1[] = { '\340', PCK_F1, 0 };
+#endif
+#if !MSDOS_COMPILER
+ char *sp = tbuf;
+#endif
+
+ switch (key)
+ {
+#if OS2
+ /*
+ * If windowid is not NULL, assume less is executed in
+ * the XFree86 environment.
+ */
+ case SK_RIGHT_ARROW:
+ s = windowid ? ltgetstr("kr", &sp) : k_right;
+ break;
+ case SK_LEFT_ARROW:
+ s = windowid ? ltgetstr("kl", &sp) : k_left;
+ break;
+ case SK_UP_ARROW:
+ s = windowid ? ltgetstr("ku", &sp) : k_up;
+ break;
+ case SK_DOWN_ARROW:
+ s = windowid ? ltgetstr("kd", &sp) : k_down;
+ break;
+ case SK_PAGE_UP:
+ s = windowid ? ltgetstr("kP", &sp) : k_pageup;
+ break;
+ case SK_PAGE_DOWN:
+ s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
+ break;
+ case SK_HOME:
+ s = windowid ? ltgetstr("kh", &sp) : k_home;
+ break;
+ case SK_END:
+ s = windowid ? ltgetstr("@7", &sp) : k_end;
+ break;
+ case SK_DELETE:
+ if (windowid)
+ {
+ s = ltgetstr("kD", &sp);
+ if (s == NULL)
+ {
+ tbuf[0] = '\177';
+ tbuf[1] = '\0';
+ s = tbuf;
+ }
+ } else
+ s = k_delete;
+ break;
+#endif
+#if MSDOS_COMPILER
+ case SK_RIGHT_ARROW:
+ s = k_right;
+ break;
+ case SK_LEFT_ARROW:
+ s = k_left;
+ break;
+ case SK_UP_ARROW:
+ s = k_up;
+ break;
+ case SK_DOWN_ARROW:
+ s = k_down;
+ break;
+ case SK_PAGE_UP:
+ s = k_pageup;
+ break;
+ case SK_PAGE_DOWN:
+ s = k_pagedown;
+ break;
+ case SK_HOME:
+ s = k_home;
+ break;
+ case SK_END:
+ s = k_end;
+ break;
+ case SK_DELETE:
+ s = k_delete;
+ break;
+#endif
+#if MSDOS_COMPILER || OS2
+ case SK_INSERT:
+ s = k_insert;
+ break;
+ case SK_CTL_LEFT_ARROW:
+ s = k_ctl_left;
+ break;
+ case SK_CTL_RIGHT_ARROW:
+ s = k_ctl_right;
+ break;
+ case SK_CTL_BACKSPACE:
+ s = k_ctl_backspace;
+ break;
+ case SK_CTL_DELETE:
+ s = k_ctl_delete;
+ break;
+ case SK_F1:
+ s = k_f1;
+ break;
+ case SK_BACKTAB:
+ s = k_backtab;
+ break;
+#else
+ case SK_RIGHT_ARROW:
+ s = ltgetstr("kr", &sp);
+ break;
+ case SK_LEFT_ARROW:
+ s = ltgetstr("kl", &sp);
+ break;
+ case SK_UP_ARROW:
+ s = ltgetstr("ku", &sp);
+ break;
+ case SK_DOWN_ARROW:
+ s = ltgetstr("kd", &sp);
+ break;
+ case SK_PAGE_UP:
+ s = ltgetstr("kP", &sp);
+ break;
+ case SK_PAGE_DOWN:
+ s = ltgetstr("kN", &sp);
+ break;
+ case SK_HOME:
+ s = ltgetstr("kh", &sp);
+ break;
+ case SK_END:
+ s = ltgetstr("@7", &sp);
+ break;
+ case SK_DELETE:
+ s = ltgetstr("kD", &sp);
+ if (s == NULL)
+ {
+ tbuf[0] = '\177';
+ tbuf[1] = '\0';
+ s = tbuf;
+ }
+ break;
+#endif
+ case SK_CONTROL_K:
+ tbuf[0] = CONTROL('K');
+ tbuf[1] = '\0';
+ s = tbuf;
+ break;
+ default:
+ return (NULL);
+ }
+ return (s);
+}
+
+/*
+ * Get terminal capabilities via termcap.
+ */
+ public void
+get_term()
+{
+#if MSDOS_COMPILER
+ auto_wrap = 1;
+ ignaw = 0;
+ can_goto_line = 1;
+ clear_bg = 1;
+ /*
+ * Set up default colors.
+ * The xx_s_width and xx_e_width vars are already initialized to 0.
+ */
+#if MSDOS_COMPILER==MSOFTC
+ sy_bg_color = _getbkcolor();
+ sy_fg_color = _gettextcolor();
+ get_clock();
+#else
+#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+ {
+ struct text_info w;
+ gettextinfo(&w);
+ sy_bg_color = (w.attribute >> 4) & 0x0F;
+ sy_fg_color = (w.attribute >> 0) & 0x0F;
+ }
+#else
+#if MSDOS_COMPILER==WIN32C
+ {
+ DWORD nread;
+ CONSOLE_SCREEN_BUFFER_INFO scr;
+
+ con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
+ /*
+ * Always open stdin in binary. Note this *must* be done
+ * before any file operations have been done on fd0.
+ */
+ SET_BINARY(0);
+ GetConsoleScreenBufferInfo(con_out, &scr);
+ ReadConsoleOutputAttribute(con_out, &curr_attr,
+ 1, scr.dwCursorPosition, &nread);
+ sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
+ sy_fg_color = curr_attr & FG_COLORS;
+ }
+#endif
+#endif
+#endif
+ nm_fg_color = sy_fg_color;
+ nm_bg_color = sy_bg_color;
+ bo_fg_color = 11;
+ bo_bg_color = 0;
+ ul_fg_color = 9;
+ ul_bg_color = 0;
+ so_fg_color = 15;
+ so_bg_color = 9;
+ bl_fg_color = 15;
+ bl_bg_color = 0;
+
+ /*
+ * Get size of the screen.
+ */
+ scrsize();
+ pos_init();
+
+
+#else /* !MSDOS_COMPILER */
+
+ char *sp;
+ register char *t1, *t2;
+ char *term;
+ char termbuf[TERMBUF_SIZE];
+
+ static char sbuf[TERMSBUF_SIZE];
+
+#if OS2
+ /*
+ * Make sure the termcap database is available.
+ */
+ sp = lgetenv("TERMCAP");
+ if (sp == NULL || *sp == '\0')
+ {
+ char *termcap;
+ if ((sp = homefile("termcap.dat")) != NULL)
+ {
+ termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
+ sprintf(termcap, "TERMCAP=%s", sp);
+ free(sp);
+ putenv(termcap);
+ }
+ }
+#endif
+ /*
+ * Find out what kind of terminal this is.
+ */
+ if ((term = lgetenv("TERM")) == NULL)
+ term = DEFAULT_TERM;
+ hardcopy = 0;
+ if (tgetent(termbuf, term) != TGETENT_OK)
+ hardcopy = 1;
+ if (ltgetflag("hc"))
+ hardcopy = 1;
+
+ /*
+ * Get size of the screen.
+ */
+ scrsize();
+ pos_init();
+
+ auto_wrap = ltgetflag("am");
+ ignaw = ltgetflag("xn");
+ above_mem = ltgetflag("da");
+ below_mem = ltgetflag("db");
+ clear_bg = ltgetflag("ut");
+
+ /*
+ * Assumes termcap variable "sg" is the printing width of:
+ * the standout sequence, the end standout sequence,
+ * the underline sequence, the end underline sequence,
+ * the boldface sequence, and the end boldface sequence.
+ */
+ if ((so_s_width = ltgetnum("sg")) < 0)
+ so_s_width = 0;
+ so_e_width = so_s_width;
+
+ bo_s_width = bo_e_width = so_s_width;
+ ul_s_width = ul_e_width = so_s_width;
+ bl_s_width = bl_e_width = so_s_width;
+
+#if HILITE_SEARCH
+ if (so_s_width > 0 || so_e_width > 0)
+ /*
+ * Disable highlighting by default on magic cookie terminals.
+ * Turning on highlighting might change the displayed width
+ * of a line, causing the display to get messed up.
+ * The user can turn it back on with -g,
+ * but she won't like the results.
+ */
+ hilite_search = 0;
+#endif
+
+ /*
+ * Get various string-valued capabilities.
+ */
+ sp = sbuf;
+
+#if HAVE_OSPEED
+ sc_pad = ltgetstr("pc", &sp);
+ if (sc_pad != NULL)
+ PC = *sc_pad;
+#endif
+
+ sc_s_keypad = ltgetstr("ks", &sp);
+ if (sc_s_keypad == NULL)
+ sc_s_keypad = "";
+ sc_e_keypad = ltgetstr("ke", &sp);
+ if (sc_e_keypad == NULL)
+ sc_e_keypad = "";
+
+ sc_init = ltgetstr("ti", &sp);
+ if (sc_init == NULL)
+ sc_init = "";
+
+ sc_deinit= ltgetstr("te", &sp);
+ if (sc_deinit == NULL)
+ sc_deinit = "";
+
+ sc_eol_clear = ltgetstr("ce", &sp);
+ if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
+ {
+ missing_cap = 1;
+ sc_eol_clear = "";
+ }
+
+ sc_eos_clear = ltgetstr("cd", &sp);
+ if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
+ {
+ missing_cap = 1;
+ sc_eos_clear = "";
+ }
+
+ sc_clear = ltgetstr("cl", &sp);
+ if (sc_clear == NULL || *sc_clear == '\0')
+ {
+ missing_cap = 1;
+ sc_clear = "\n\n";
+ }
+
+ sc_move = ltgetstr("cm", &sp);
+ if (sc_move == NULL || *sc_move == '\0')
+ {
+ /*
+ * This is not an error here, because we don't
+ * always need sc_move.
+ * We need it only if we don't have home or lower-left.
+ */
+ sc_move = "";
+ can_goto_line = 0;
+ } else
+ can_goto_line = 1;
+
+ tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
+ tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
+ tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
+ tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
+
+ sc_visual_bell = ltgetstr("vb", &sp);
+ if (sc_visual_bell == NULL)
+ sc_visual_bell = "";
+
+ if (ltgetflag("bs"))
+ sc_backspace = "\b";
+ else
+ {
+ sc_backspace = ltgetstr("bc", &sp);
+ if (sc_backspace == NULL || *sc_backspace == '\0')
+ sc_backspace = "\b";
+ }
+
+ /*
+ * Choose between using "ho" and "cm" ("home" and "cursor move")
+ * to move the cursor to the upper left corner of the screen.
+ */
+ t1 = ltgetstr("ho", &sp);
+ if (t1 == NULL)
+ t1 = "";
+ if (*sc_move == '\0')
+ t2 = "";
+ else
+ {
+ strcpy(sp, tgoto(sc_move, 0, 0));
+ t2 = sp;
+ sp += strlen(sp) + 1;
+ }
+ sc_home = cheaper(t1, t2, "|\b^");
+
+ /*
+ * Choose between using "ll" and "cm" ("lower left" and "cursor move")
+ * to move the cursor to the lower left corner of the screen.
+ */
+ t1 = ltgetstr("ll", &sp);
+ if (t1 == NULL)
+ t1 = "";
+ if (*sc_move == '\0')
+ t2 = "";
+ else
+ {
+ strcpy(sp, tgoto(sc_move, 0, sc_height-1));
+ t2 = sp;
+ sp += strlen(sp) + 1;
+ }
+ sc_lower_left = cheaper(t1, t2, "\r");
+
+ /*
+ * Get carriage return string.
+ */
+ sc_return = ltgetstr("cr", &sp);
+ if (sc_return == NULL)
+ sc_return = "\r";
+
+ /*
+ * Choose between using "al" or "sr" ("add line" or "scroll reverse")
+ * to add a line at the top of the screen.
+ */
+ t1 = ltgetstr("al", &sp);
+ if (t1 == NULL)
+ t1 = "";
+ t2 = ltgetstr("sr", &sp);
+ if (t2 == NULL)
+ t2 = "";
+#if OS2
+ if (*t1 == '\0' && *t2 == '\0')
+ sc_addline = "";
+ else
+#endif
+ if (above_mem)
+ sc_addline = t1;
+ else
+ sc_addline = cheaper(t1, t2, "");
+ if (*sc_addline == '\0')
+ {
+ /*
+ * Force repaint on any backward movement.
+ */
+ no_back_scroll = 1;
+ }
+#endif /* MSDOS_COMPILER */
+}
+
+#if !MSDOS_COMPILER
+/*
+ * Return the cost of displaying a termcap string.
+ * We use the trick of calling tputs, but as a char printing function
+ * we give it inc_costcount, which just increments "costcount".
+ * This tells us how many chars would be printed by using this string.
+ * {{ Couldn't we just use strlen? }}
+ */
+static int costcount;
+
+/*ARGSUSED*/
+ static int
+inc_costcount(c)
+ int c;
+{
+ costcount++;
+ return (c);
+}
+
+ static int
+cost(t)
+ char *t;
+{
+ costcount = 0;
+ tputs(t, sc_height, inc_costcount);
+ return (costcount);
+}
+
+/*
+ * Return the "best" of the two given termcap strings.
+ * The best, if both exist, is the one with the lower
+ * cost (see cost() function).
+ */
+ static char *
+cheaper(t1, t2, def)
+ char *t1, *t2;
+ char *def;
+{
+ if (*t1 == '\0' && *t2 == '\0')
+ {
+ missing_cap = 1;
+ return (def);
+ }
+ if (*t1 == '\0')
+ return (t2);
+ if (*t2 == '\0')
+ return (t1);
+ if (cost(t1) < cost(t2))
+ return (t1);
+ return (t2);
+}
+
+ static void
+tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
+ char *incap;
+ char *outcap;
+ char **instr;
+ char **outstr;
+ char *def_instr;
+ char *def_outstr;
+ char **spp;
+{
+ *instr = ltgetstr(incap, spp);
+ if (*instr == NULL)
+ {
+ /* Use defaults. */
+ *instr = def_instr;
+ *outstr = def_outstr;
+ return;
+ }
+
+ *outstr = ltgetstr(outcap, spp);
+ if (*outstr == NULL)
+ /* No specific out capability; use "me". */
+ *outstr = ltgetstr("me", spp);
+ if (*outstr == NULL)
+ /* Don't even have "me"; use a null string. */
+ *outstr = "";
+}
+
+#endif /* MSDOS_COMPILER */
+
+
+/*
+ * Below are the functions which perform all the
+ * terminal-specific screen manipulation.
+ */
+
+
+#if MSDOS_COMPILER
+
+#if MSDOS_COMPILER==WIN32C
+ static void
+_settextposition(int row, int col)
+{
+ COORD cpos;
+ CONSOLE_SCREEN_BUFFER_INFO csbi;
+
+ GetConsoleScreenBufferInfo(con_out, &csbi);
+ cpos.X = csbi.srWindow.Left + (col - 1);
+ cpos.Y = csbi.srWindow.Top + (row - 1);
+ SetConsoleCursorPosition(con_out, cpos);
+}
+#endif
+
+/*
+ * Initialize the screen to the correct color at startup.
+ */
+ static void
+initcolor()
+{
+ SETCOLORS(nm_fg_color, nm_bg_color);
+#if 0
+ /*
+ * This clears the screen at startup. This is different from
+ * the behavior of other versions of less. Disable it for now.
+ */
+ char *blanks;
+ int row;
+ int col;
+
+ /*
+ * Create a complete, blank screen using "normal" colors.
+ */
+ SETCOLORS(nm_fg_color, nm_bg_color);
+ blanks = (char *) ecalloc(width+1, sizeof(char));
+ for (col = 0; col < sc_width; col++)
+ blanks[col] = ' ';
+ blanks[sc_width] = '\0';
+ for (row = 0; row < sc_height; row++)
+ _outtext(blanks);
+ free(blanks);
+#endif
+}
+#endif
+
+#if MSDOS_COMPILER==WIN32C
+
+/*
+ * Termcap-like init with a private win32 console.
+ */
+ static void
+win32_init_term()
+{
+ CONSOLE_SCREEN_BUFFER_INFO scr;
+ COORD size;
+
+ if (con_out_save == INVALID_HANDLE_VALUE)
+ return;
+
+ GetConsoleScreenBufferInfo(con_out_save, &scr);
+
+ if (con_out_ours == INVALID_HANDLE_VALUE)
+ {
+ /*
+ * Create our own screen buffer, so that we
+ * may restore the original when done.
+ */
+ con_out_ours = CreateConsoleScreenBuffer(
+ GENERIC_WRITE | GENERIC_READ,
+ FILE_SHARE_WRITE | FILE_SHARE_READ,
+ (LPSECURITY_ATTRIBUTES) NULL,
+ CONSOLE_TEXTMODE_BUFFER,
+ (LPVOID) NULL);
+ }
+
+ size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
+ size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
+ SetConsoleScreenBufferSize(con_out_ours, size);
+ SetConsoleActiveScreenBuffer(con_out_ours);
+ con_out = con_out_ours;
+}
+
+/*
+ * Restore the startup console.
+ */
+static void
+win32_deinit_term()
+{
+ if (con_out_save == INVALID_HANDLE_VALUE)
+ return;
+ if (quitting)
+ (void) CloseHandle(con_out_ours);
+ SetConsoleActiveScreenBuffer(con_out_save);
+ con_out = con_out_save;
+}
+
+#endif
+
+/*
+ * Initialize terminal
+ */
+ public void
+init()
+{
+#if !MSDOS_COMPILER
+ if (!no_init)
+ tputs(sc_init, sc_height, putchr);
+ if (!no_keypad)
+ tputs(sc_s_keypad, sc_height, putchr);
+ if (top_scroll)
+ {
+ int i;
+
+ /*
+ * This is nice to terminals with no alternate screen,
+ * but with saved scrolled-off-the-top lines. This way,
+ * no previous line is lost, but we start with a whole
+ * screen to ourself.
+ */
+ for (i = 1; i < sc_height; i++)
+ putchr('\n');
+ } else
+ line_left();
+#else
+#if MSDOS_COMPILER==WIN32C
+ if (!no_init)
+ win32_init_term();
+#endif
+ initcolor();
+ flush();
+#endif
+ init_done = 1;
+}
+
+/*
+ * Deinitialize terminal
+ */
+ public void
+deinit()
+{
+ if (!init_done)
+ return;
+#if !MSDOS_COMPILER
+ if (!no_keypad)
+ tputs(sc_e_keypad, sc_height, putchr);
+ if (!no_init)
+ tputs(sc_deinit, sc_height, putchr);
+#else
+ /* Restore system colors. */
+ SETCOLORS(sy_fg_color, sy_bg_color);
+#if MSDOS_COMPILER==WIN32C
+ if (!no_init)
+ win32_deinit_term();
+#else
+ /* Need clreol to make SETCOLORS take effect. */
+ clreol();
+#endif
+#endif
+ init_done = 0;
+}
+
+/*
+ * Home cursor (move to upper left corner of screen).
+ */
+ public void
+home()
+{
+#if !MSDOS_COMPILER
+ tputs(sc_home, 1, putchr);
+#else
+ flush();
+ _settextposition(1,1);
+#endif
+}
+
+/*
+ * Add a blank line (called with cursor at home).
+ * Should scroll the display down.
+ */
+ public void
+add_line()
+{
+#if !MSDOS_COMPILER
+ tputs(sc_addline, sc_height, putchr);
+#else
+ flush();
+#if MSDOS_COMPILER==MSOFTC
+ _scrolltextwindow(_GSCROLLDOWN);
+ _settextposition(1,1);
+#else
+#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+ movetext(1,1, sc_width,sc_height-1, 1,2);
+ gotoxy(1,1);
+ clreol();
+#else
+#if MSDOS_COMPILER==WIN32C
+ {
+ CHAR_INFO fillchar;
+ SMALL_RECT rcSrc, rcClip;
+ COORD new_org;
+ CONSOLE_SCREEN_BUFFER_INFO csbi;
+
+ GetConsoleScreenBufferInfo(con_out,&csbi);
+
+ /* The clip rectangle is the entire visible screen. */
+ rcClip.Left = csbi.srWindow.Left;
+ rcClip.Top = csbi.srWindow.Top;
+ rcClip.Right = csbi.srWindow.Right;
+ rcClip.Bottom = csbi.srWindow.Bottom;
+
+ /* The source rectangle is the visible screen minus the last line. */
+ rcSrc = rcClip;
+ rcSrc.Bottom--;
+
+ /* Move the top left corner of the source window down one row. */
+ new_org.X = rcSrc.Left;
+ new_org.Y = rcSrc.Top + 1;
+
+ /* Fill the right character and attributes. */
+ fillchar.Char.AsciiChar = ' ';
+ curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
+ fillchar.Attributes = curr_attr;
+ ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
+ _settextposition(1,1);
+ }
+#endif
+#endif
+#endif
+#endif
+}
+
+#if 0
+/*
+ * Remove the n topmost lines and scroll everything below it in the
+ * window upward. This is needed to stop leaking the topmost line
+ * into the scrollback buffer when we go down-one-line (in WIN32).
+ */
+ public void
+remove_top(n)
+ int n;
+{
+#if MSDOS_COMPILER==WIN32C
+ SMALL_RECT rcSrc, rcClip;
+ CHAR_INFO fillchar;
+ COORD new_org;
+ CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
+
+ if (n >= sc_height - 1)
+ {
+ clear();
+ home();
+ return;
+ }
+
+ flush();
+
+ GetConsoleScreenBufferInfo(con_out, &csbi);
+
+ /* Get the extent of all-visible-rows-but-the-last. */
+ rcSrc.Left = csbi.srWindow.Left;
+ rcSrc.Top = csbi.srWindow.Top + n;
+ rcSrc.Right = csbi.srWindow.Right;
+ rcSrc.Bottom = csbi.srWindow.Bottom;
+
+ /* Get the clip rectangle. */
+ rcClip.Left = rcSrc.Left;
+ rcClip.Top = csbi.srWindow.Top;
+ rcClip.Right = rcSrc.Right;
+ rcClip.Bottom = rcSrc.Bottom ;
+
+ /* Move the source window up n rows. */
+ new_org.X = rcSrc.Left;
+ new_org.Y = rcSrc.Top - n;
+
+ /* Fill the right character and attributes. */
+ fillchar.Char.AsciiChar = ' ';
+ curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
+ fillchar.Attributes = curr_attr;
+
+ ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
+
+ /* Position cursor on first blank line. */
+ goto_line(sc_height - n - 1);
+#endif
+}
+#endif
+
+#if MSDOS_COMPILER==WIN32C
+/*
+ * Clear the screen.
+ */
+ static void
+win32_clear()
+{
+ /*
+ * This will clear only the currently visible rows of the NT
+ * console buffer, which means none of the precious scrollback
+ * rows are touched making for faster scrolling. Note that, if
+ * the window has fewer columns than the console buffer (i.e.
+ * there is a horizontal scrollbar as well), the entire width
+ * of the visible rows will be cleared.
+ */
+ COORD topleft;
+ DWORD nchars;
+ DWORD winsz;
+ CONSOLE_SCREEN_BUFFER_INFO csbi;
+
+ /* get the number of cells in the current buffer */
+ GetConsoleScreenBufferInfo(con_out, &csbi);
+ winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
+ topleft.X = 0;
+ topleft.Y = csbi.srWindow.Top;
+
+ curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
+ FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
+ FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
+}
+
+/*
+ * Remove the n topmost lines and scroll everything below it in the
+ * window upward.
+ */
+ public void
+win32_scroll_up(n)
+ int n;
+{
+ SMALL_RECT rcSrc, rcClip;
+ CHAR_INFO fillchar;
+ COORD topleft;
+ COORD new_org;
+ DWORD nchars;
+ DWORD size;
+ CONSOLE_SCREEN_BUFFER_INFO csbi;
+
+ if (n <= 0)
+ return;
+
+ if (n >= sc_height - 1)
+ {
+ win32_clear();
+ _settextposition(1,1);
+ return;
+ }
+
+ /* Get the extent of what will remain visible after scrolling. */
+ GetConsoleScreenBufferInfo(con_out, &csbi);
+ rcSrc.Left = csbi.srWindow.Left;
+ rcSrc.Top = csbi.srWindow.Top + n;
+ rcSrc.Right = csbi.srWindow.Right;
+ rcSrc.Bottom = csbi.srWindow.Bottom;
+
+ /* Get the clip rectangle. */
+ rcClip.Left = rcSrc.Left;
+ rcClip.Top = csbi.srWindow.Top;
+ rcClip.Right = rcSrc.Right;
+ rcClip.Bottom = rcSrc.Bottom ;
+
+ /* Move the source text to the top of the screen. */
+ new_org.X = rcSrc.Left;
+ new_org.Y = rcClip.Top;
+
+ /* Fill the right character and attributes. */
+ fillchar.Char.AsciiChar = ' ';
+ fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
+
+ /* Scroll the window. */
+ SetConsoleTextAttribute(con_out, fillchar.Attributes);
+ ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
+
+ /* Clear remaining lines at bottom. */
+ topleft.X = csbi.dwCursorPosition.X;
+ topleft.Y = rcSrc.Bottom - n;
+ size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
+ FillConsoleOutputCharacter(con_out, ' ', size, topleft,
+ &nchars);
+ FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
+ &nchars);
+ SetConsoleTextAttribute(con_out, curr_attr);
+
+ /* Move cursor n lines up from where it was. */
+ csbi.dwCursorPosition.Y -= n;
+ SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
+}
+#endif
+
+/*
+ * Move cursor to lower left corner of screen.
+ */
+ public void
+lower_left()
+{
+#if !MSDOS_COMPILER
+ tputs(sc_lower_left, 1, putchr);
+#else
+ flush();
+ _settextposition(sc_height, 1);
+#endif
+}
+
+/*
+ * Move cursor to left position of current line.
+ */
+ public void
+line_left()
+{
+#if !MSDOS_COMPILER
+ tputs(sc_return, 1, putchr);
+#else
+ int row;
+ flush();
+#if MSDOS_COMPILER==WIN32C
+ {
+ CONSOLE_SCREEN_BUFFER_INFO scr;
+ GetConsoleScreenBufferInfo(con_out, &scr);
+ row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
+ }
+#else
+#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+ row = wherey();
+#else
+ {
+ struct rccoord tpos = _gettextposition();
+ row = tpos.row;
+ }
+#endif
+#endif
+ _settextposition(row, 1);
+#endif
+}
+
+/*
+ * Check if the console size has changed and reset internals
+ * (in lieu of SIGWINCH for WIN32).
+ */
+ public void
+check_winch()
+{
+#if MSDOS_COMPILER==WIN32C
+ CONSOLE_SCREEN_BUFFER_INFO scr;
+ COORD size;
+
+ if (con_out == INVALID_HANDLE_VALUE)
+ return;
+
+ flush();
+ GetConsoleScreenBufferInfo(con_out, &scr);
+ size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
+ size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
+ if (size.Y != sc_height || size.X != sc_width)
+ {
+ sc_height = size.Y;
+ sc_width = size.X;
+ if (!no_init && con_out_ours == con_out)
+ SetConsoleScreenBufferSize(con_out, size);
+ pos_init();
+ wscroll = (sc_height + 1) / 2;
+ screen_trashed = 1;
+ }
+#endif
+}
+
+/*
+ * Goto a specific line on the screen.
+ */
+ public void
+goto_line(slinenum)
+ int slinenum;
+{
+#if !MSDOS_COMPILER
+ tputs(tgoto(sc_move, 0, slinenum), 1, putchr);
+#else
+ flush();
+ _settextposition(slinenum+1, 1);
+#endif
+}
+
+#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
+/*
+ * Create an alternate screen which is all white.
+ * This screen is used to create a "flash" effect, by displaying it
+ * briefly and then switching back to the normal screen.
+ * {{ Yuck! There must be a better way to get a visual bell. }}
+ */
+ static void
+create_flash()
+{
+#if MSDOS_COMPILER==MSOFTC
+ struct videoconfig w;
+ char *blanks;
+ int row, col;
+
+ _getvideoconfig(&w);
+ videopages = w.numvideopages;
+ if (videopages < 2)
+ {
+ at_enter(AT_STANDOUT);
+ at_exit();
+ } else
+ {
+ _setactivepage(1);
+ at_enter(AT_STANDOUT);
+ blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
+ for (col = 0; col < w.numtextcols; col++)
+ blanks[col] = ' ';
+ for (row = w.numtextrows; row > 0; row--)
+ _outmem(blanks, w.numtextcols);
+ _setactivepage(0);
+ _setvisualpage(0);
+ free(blanks);
+ at_exit();
+ }
+#else
+#if MSDOS_COMPILER==BORLANDC
+ register int n;
+
+ whitescreen = (unsigned short *)
+ malloc(sc_width * sc_height * sizeof(short));
+ if (whitescreen == NULL)
+ return;
+ for (n = 0; n < sc_width * sc_height; n++)
+ whitescreen[n] = 0x7020;
+#else
+#if MSDOS_COMPILER==WIN32C
+ register int n;
+
+ whitescreen = (WORD *)
+ malloc(sc_height * sc_width * sizeof(WORD));
+ if (whitescreen == NULL)
+ return;
+ /* Invert the standard colors. */
+ for (n = 0; n < sc_width * sc_height; n++)
+ whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color);
+#endif
+#endif
+#endif
+ flash_created = 1;
+}
+#endif /* MSDOS_COMPILER */
+
+/*
+ * Output the "visual bell", if there is one.
+ */
+ public void
+vbell()
+{
+#if !MSDOS_COMPILER
+ if (*sc_visual_bell == '\0')
+ return;
+ tputs(sc_visual_bell, sc_height, putchr);
+#else
+#if MSDOS_COMPILER==DJGPPC
+ ScreenVisualBell();
+#else
+#if MSDOS_COMPILER==MSOFTC
+ /*
+ * Create a flash screen on the second video page.
+ * Switch to that page, then switch back.
+ */
+ if (!flash_created)
+ create_flash();
+ if (videopages < 2)
+ return;
+ _setvisualpage(1);
+ delay(100);
+ _setvisualpage(0);
+#else
+#if MSDOS_COMPILER==BORLANDC
+ unsigned short *currscreen;
+
+ /*
+ * Get a copy of the current screen.
+ * Display the flash screen.
+ * Then restore the old screen.
+ */
+ if (!flash_created)
+ create_flash();
+ if (whitescreen == NULL)
+ return;
+ currscreen = (unsigned short *)
+ malloc(sc_width * sc_height * sizeof(short));
+ if (currscreen == NULL) return;
+ gettext(1, 1, sc_width, sc_height, currscreen);
+ puttext(1, 1, sc_width, sc_height, whitescreen);
+ delay(100);
+ puttext(1, 1, sc_width, sc_height, currscreen);
+ free(currscreen);
+#else
+#if MSDOS_COMPILER==WIN32C
+ /* paint screen with an inverse color */
+ clear();
+
+ /* leave it displayed for 100 msec. */
+ Sleep(100);
+
+ /* restore with a redraw */
+ repaint();
+#endif
+#endif
+#endif
+#endif
+#endif
+}
+
+/*
+ * Make a noise.
+ */
+ static void
+beep()
+{
+#if !MSDOS_COMPILER
+ putchr(CONTROL('G'));
+#else
+#if MSDOS_COMPILER==WIN32C
+ MessageBeep(0);
+#else
+ write(1, "\7", 1);
+#endif
+#endif
+}
+
+/*
+ * Ring the terminal bell.
+ */
+ public void
+bell()
+{
+ if (quiet == VERY_QUIET)
+ vbell();
+ else
+ beep();
+}
+
+/*
+ * Clear the screen.
+ */
+ public void
+clear()
+{
+#if !MSDOS_COMPILER
+ tputs(sc_clear, sc_height, putchr);
+#else
+ flush();
+#if MSDOS_COMPILER==WIN32C
+ win32_clear();
+#else
+ _clearscreen(_GCLEARSCREEN);
+#endif
+#endif
+}
+
+/*
+ * Clear from the cursor to the end of the cursor's line.
+ * {{ This must not move the cursor. }}
+ */
+ public void
+clear_eol()
+{
+#if !MSDOS_COMPILER
+ tputs(sc_eol_clear, 1, putchr);
+#else
+#if MSDOS_COMPILER==MSOFTC
+ short top, left;
+ short bot, right;
+ struct rccoord tpos;
+
+ flush();
+ /*
+ * Save current state.
+ */
+ tpos = _gettextposition();
+ _gettextwindow(&top, &left, &bot, &right);
+ /*
+ * Set a temporary window to the current line,
+ * from the cursor's position to the right edge of the screen.
+ * Then clear that window.
+ */
+ _settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
+ _clearscreen(_GWINDOW);
+ /*
+ * Restore state.
+ */
+ _settextwindow(top, left, bot, right);
+ _settextposition(tpos.row, tpos.col);
+#else
+#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+ flush();
+ clreol();
+#else
+#if MSDOS_COMPILER==WIN32C
+ DWORD nchars;
+ COORD cpos;
+ CONSOLE_SCREEN_BUFFER_INFO scr;
+
+ flush();
+ memset(&scr, 0, sizeof(scr));
+ GetConsoleScreenBufferInfo(con_out, &scr);
+ cpos.X = scr.dwCursorPosition.X;
+ cpos.Y = scr.dwCursorPosition.Y;
+ curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
+ FillConsoleOutputAttribute(con_out, curr_attr,
+ scr.dwSize.X - cpos.X, cpos, &nchars);
+ FillConsoleOutputCharacter(con_out, ' ',
+ scr.dwSize.X - cpos.X, cpos, &nchars);
+#endif
+#endif
+#endif
+#endif
+}
+
+/*
+ * Clear the current line.
+ * Clear the screen if there's off-screen memory below the display.
+ */
+ static void
+clear_eol_bot()
+{
+#if MSDOS_COMPILER
+ clear_eol();
+#else
+ if (below_mem)
+ tputs(sc_eos_clear, 1, putchr);
+ else
+ tputs(sc_eol_clear, 1, putchr);
+#endif
+}
+
+/*
+ * Clear the bottom line of the display.
+ * Leave the cursor at the beginning of the bottom line.
+ */
+ public void
+clear_bot()
+{
+ /*
+ * If we're in a non-normal attribute mode, temporarily exit
+ * the mode while we do the clear. Some terminals fill the
+ * cleared area with the current attribute.
+ */
+ if (oldbot)
+ lower_left();
+ else
+ line_left();
+
+ if (attrmode == AT_NORMAL)
+ clear_eol_bot();
+ else
+ {
+ int saved_attrmode = attrmode;
+
+ at_exit();
+ clear_eol_bot();
+ at_enter(saved_attrmode);
+ }
+}
+
+ public void
+at_enter(attr)
+ int attr;
+{
+ attr = apply_at_specials(attr);
+
+#if !MSDOS_COMPILER
+ /* The one with the most priority is last. */
+ if (attr & AT_UNDERLINE)
+ tputs(sc_u_in, 1, putchr);
+ if (attr & AT_BOLD)
+ tputs(sc_b_in, 1, putchr);
+ if (attr & AT_BLINK)
+ tputs(sc_bl_in, 1, putchr);
+ if (attr & AT_STANDOUT)
+ tputs(sc_s_in, 1, putchr);
+#else
+ flush();
+ /* The one with the most priority is first. */
+ if (attr & AT_STANDOUT)
+ {
+ SETCOLORS(so_fg_color, so_bg_color);
+ } else if (attr & AT_BLINK)
+ {
+ SETCOLORS(bl_fg_color, bl_bg_color);
+ }
+ else if (attr & AT_BOLD)
+ {
+ SETCOLORS(bo_fg_color, bo_bg_color);
+ }
+ else if (attr & AT_UNDERLINE)
+ {
+ SETCOLORS(ul_fg_color, ul_bg_color);
+ }
+#endif
+
+ attrmode = attr;
+}
+
+ public void
+at_exit()
+{
+#if !MSDOS_COMPILER
+ /* Undo things in the reverse order we did them. */
+ if (attrmode & AT_STANDOUT)
+ tputs(sc_s_out, 1, putchr);
+ if (attrmode & AT_BLINK)
+ tputs(sc_bl_out, 1, putchr);
+ if (attrmode & AT_BOLD)
+ tputs(sc_b_out, 1, putchr);
+ if (attrmode & AT_UNDERLINE)
+ tputs(sc_u_out, 1, putchr);
+#else
+ flush();
+ SETCOLORS(nm_fg_color, nm_bg_color);
+#endif
+
+ attrmode = AT_NORMAL;
+}
+
+ public void
+at_switch(attr)
+ int attr;
+{
+ int new_attrmode = apply_at_specials(attr);
+ int ignore_modes = AT_ANSI;
+
+ if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
+ {
+ at_exit();
+ at_enter(attr);
+ }
+}
+
+ public int
+is_at_equiv(attr1, attr2)
+ int attr1;
+ int attr2;
+{
+ attr1 = apply_at_specials(attr1);
+ attr2 = apply_at_specials(attr2);
+
+ return (attr1 == attr2);
+}
+
+ public int
+apply_at_specials(attr)
+ int attr;
+{
+ if (attr & AT_BINARY)
+ attr |= binattr;
+ if (attr & AT_HILITE)
+ attr |= AT_STANDOUT;
+ attr &= ~(AT_BINARY|AT_HILITE);
+
+ return attr;
+}
+
+#if 0 /* No longer used */
+/*
+ * Erase the character to the left of the cursor
+ * and move the cursor left.
+ */
+ public void
+backspace()
+{
+#if !MSDOS_COMPILER
+ /*
+ * Erase the previous character by overstriking with a space.
+ */
+ tputs(sc_backspace, 1, putchr);
+ putchr(' ');
+ tputs(sc_backspace, 1, putchr);
+#else
+#if MSDOS_COMPILER==MSOFTC
+ struct rccoord tpos;
+
+ flush();
+ tpos = _gettextposition();
+ if (tpos.col <= 1)
+ return;
+ _settextposition(tpos.row, tpos.col-1);
+ _outtext(" ");
+ _settextposition(tpos.row, tpos.col-1);
+#else
+#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+ cputs("\b");
+#else
+#if MSDOS_COMPILER==WIN32C
+ COORD cpos;
+ DWORD cChars;
+ CONSOLE_SCREEN_BUFFER_INFO scr;
+
+ flush();
+ GetConsoleScreenBufferInfo(con_out, &scr);
+ cpos = scr.dwCursorPosition;
+ if (cpos.X <= 0)
+ return;
+ cpos.X--;
+ SetConsoleCursorPosition(con_out, cpos);
+ FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars);
+ SetConsoleCursorPosition(con_out, cpos);
+#endif
+#endif
+#endif
+#endif
+}
+#endif /* 0 */
+
+/*
+ * Output a plain backspace, without erasing the previous char.
+ */
+ public void
+putbs()
+{
+#if !MSDOS_COMPILER
+ tputs(sc_backspace, 1, putchr);
+#else
+ int row, col;
+
+ flush();
+ {
+#if MSDOS_COMPILER==MSOFTC
+ struct rccoord tpos;
+ tpos = _gettextposition();
+ row = tpos.row;
+ col = tpos.col;
+#else
+#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
+ row = wherey();
+ col = wherex();
+#else
+#if MSDOS_COMPILER==WIN32C
+ CONSOLE_SCREEN_BUFFER_INFO scr;
+ GetConsoleScreenBufferInfo(con_out, &scr);
+ row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
+ col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
+#endif
+#endif
+#endif
+ }
+ if (col <= 1)
+ return;
+ _settextposition(row, col-1);
+#endif /* MSDOS_COMPILER */
+}
+
+#if MSDOS_COMPILER==WIN32C
+/*
+ * Determine whether an input character is waiting to be read.
+ */
+ static int
+win32_kbhit(tty)
+ HANDLE tty;
+{
+ INPUT_RECORD ip;
+ DWORD read;
+
+ if (keyCount > 0)
+ return (TRUE);
+
+ currentKey.ascii = 0;
+ currentKey.scan = 0;
+
+ /*
+ * Wait for a real key-down event, but
+ * ignore SHIFT and CONTROL key events.
+ */
+ do
+ {
+ PeekConsoleInput(tty, &ip, 1, &read);
+ if (read == 0)
+ return (FALSE);
+ ReadConsoleInput(tty, &ip, 1, &read);
+ } while (ip.EventType != KEY_EVENT ||
+ ip.Event.KeyEvent.bKeyDown != TRUE ||
+ ip.Event.KeyEvent.wVirtualScanCode == 0 ||
+ ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
+ ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
+ ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
+
+ currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar;
+ currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode;
+ keyCount = ip.Event.KeyEvent.wRepeatCount;
+
+ if (ip.Event.KeyEvent.dwControlKeyState &
+ (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
+ {
+ switch (currentKey.scan)
+ {
+ case PCK_ALT_E: /* letter 'E' */
+ currentKey.ascii = 0;
+ break;
+ }
+ } else if (ip.Event.KeyEvent.dwControlKeyState &
+ (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
+ {
+ switch (currentKey.scan)
+ {
+ case PCK_RIGHT: /* right arrow */
+ currentKey.scan = PCK_CTL_RIGHT;
+ break;
+ case PCK_LEFT: /* left arrow */
+ currentKey.scan = PCK_CTL_LEFT;
+ break;
+ case PCK_DELETE: /* delete */
+ currentKey.scan = PCK_CTL_DELETE;
+ break;
+ }
+ }
+ return (TRUE);
+}
+
+/*
+ * Read a character from the keyboard.
+ */
+ public char
+WIN32getch(tty)
+ int tty;
+{
+ int ascii;
+
+ if (pending_scancode)
+ {
+ pending_scancode = 0;
+ return ((char)(currentKey.scan & 0x00FF));
+ }
+
+ while (win32_kbhit((HANDLE)tty) == FALSE)
+ {
+ Sleep(20);
+ if (ABORT_SIGS())
+ return ('\003');
+ continue;
+ }
+ keyCount --;
+ ascii = currentKey.ascii;
+ /*
+ * On PC's, the extended keys return a 2 byte sequence beginning
+ * with '00', so if the ascii code is 00, the next byte will be
+ * the lsb of the scan code.
+ */
+ pending_scancode = (ascii == 0x00);
+ return ((char)ascii);
+}
+#endif
+
+#if MSDOS_COMPILER
+/*
+ */
+ public void
+WIN32setcolors(fg, bg)
+ int fg;
+ int bg;
+{
+ SETCOLORS(fg, bg);
+}
+
+/*
+ */
+ public void
+WIN32textout(text, len)
+ char *text;
+ int len;
+{
+#if MSDOS_COMPILER==WIN32C
+ DWORD written;
+ WriteConsole(con_out, text, len, &written, NULL);
+#else
+ char c = text[len];
+ text[len] = '\0';
+ cputs(text);
+ text[len] = c;
+#endif
+}
+#endif
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+/*
+ * This program is used to determine the screen dimensions on OS/2 systems.
+ * Adapted from code written by Kyosuke Tokoro (NBG01720@nifty.ne.jp).
+ */
+
+/*
+ * When I wrote this routine, I consulted some part of the source code
+ * of the xwininfo utility by X Consortium.
+ *
+ * Copyright (c) 1987, X Consortium
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of the X Consortium shall not
+ * be used in advertising or otherwise to promote the sale, use or other
+ * dealings in this Software without prior written authorization from the X
+ * Consortium.
+ */
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+static int get_winsize(dpy, window, p_width, p_height)
+ Display *dpy;
+ Window window;
+ int *p_width;
+ int *p_height;
+{
+ XWindowAttributes win_attributes;
+ XSizeHints hints;
+ long longjunk;
+
+ if (!XGetWindowAttributes(dpy, window, &win_attributes))
+ return 1;
+ if (!XGetWMNormalHints(dpy, window, &hints, &longjunk))
+ return 1;
+ if (!(hints.flags & PResizeInc))
+ return 1;
+ if (hints.width_inc == 0 || hints.height_inc == 0)
+ return 1;
+ if (!(hints.flags & (PBaseSize|PMinSize)))
+ return 1;
+ if (hints.flags & PBaseSize)
+ {
+ win_attributes.width -= hints.base_width;
+ win_attributes.height -= hints.base_height;
+ } else
+ {
+ win_attributes.width -= hints.min_width;
+ win_attributes.height -= hints.min_height;
+ }
+ *p_width = win_attributes.width / hints.width_inc;
+ *p_height = win_attributes.height / hints.height_inc;
+ return 0;
+}
+
+int main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ char *cp;
+ Display *dpy;
+ int size[2];
+
+ _scrsize(size);
+ cp = getenv("WINDOWID");
+ if (cp != NULL)
+ {
+ dpy = XOpenDisplay(NULL);
+ if (dpy != NULL)
+ {
+ get_winsize(dpy, (Window) atol(cp), &size[0], &size[1]);
+ XCloseDisplay(dpy);
+ }
+ }
+ printf("%i %i\n", size[0], size[1]);
+ return (0);
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines to search a file for a pattern.
+ */
+
+#include "less.h"
+#include "pattern.h"
+#include "position.h"
+#include "charset.h"
+
+#define MINPOS(a,b) (((a) < (b)) ? (a) : (b))
+#define MAXPOS(a,b) (((a) > (b)) ? (a) : (b))
+
+extern int sigs;
+extern int how_search;
+extern int caseless;
+extern int linenums;
+extern int sc_height;
+extern int jump_sline;
+extern int bs_mode;
+extern int ctldisp;
+extern int status_col;
+extern void * constant ml_search;
+extern POSITION start_attnpos;
+extern POSITION end_attnpos;
+extern int utf_mode;
+extern int screen_trashed;
+#if HILITE_SEARCH
+extern int hilite_search;
+extern int size_linebuf;
+extern int squished;
+extern int can_goto_line;
+static int hide_hilite;
+static POSITION prep_startpos;
+static POSITION prep_endpos;
+static int is_caseless;
+static int is_ucase_pattern;
+
+/*
+ * Structures for maintaining a set of ranges for hilites and filtered-out
+ * lines. Each range is stored as a node within a red-black tree, and we
+ * try to extend existing ranges (without creating overlaps) rather than
+ * create new nodes if possible. We remember the last node found by a
+ * search for constant-time lookup if the next search is near enough to
+ * the previous. To aid that, we overlay a secondary doubly-linked list
+ * on top of the red-black tree so we can find the preceding/succeeding
+ * nodes also in constant time.
+ *
+ * Each node is allocated from a series of pools, each pool double the size
+ * of the previous (for amortised constant time allocation). Since our only
+ * tree operations are clear and node insertion, not node removal, we don't
+ * need to maintain a usage bitmap or freelist and can just return nodes
+ * from the pool in-order until capacity is reached.
+ */
+struct hilite
+{
+ POSITION hl_startpos;
+ POSITION hl_endpos;
+};
+struct hilite_node
+{
+ struct hilite_node *parent;
+ struct hilite_node *left;
+ struct hilite_node *right;
+ struct hilite_node *prev;
+ struct hilite_node *next;
+ int red;
+ struct hilite r;
+};
+struct hilite_storage
+{
+ int capacity;
+ int used;
+ struct hilite_storage *next;
+ struct hilite_node *nodes;
+};
+struct hilite_tree
+{
+ struct hilite_storage *first;
+ struct hilite_storage *current;
+ struct hilite_node *root;
+ struct hilite_node *lookaside;
+};
+#define HILITE_INITIALIZER() { NULL, NULL, NULL, NULL }
+#define HILITE_LOOKASIDE_STEPS 2
+
+static struct hilite_tree hilite_anchor = HILITE_INITIALIZER();
+static struct hilite_tree filter_anchor = HILITE_INITIALIZER();
+
+#endif
+
+/*
+ * These are the static variables that represent the "remembered"
+ * search pattern and filter pattern.
+ */
+struct pattern_info {
+ DEFINE_PATTERN(compiled);
+ char* text;
+ int search_type;
+};
+
+#if NO_REGEX
+#define info_compiled(info) ((void*)0)
+#else
+#define info_compiled(info) ((info)->compiled)
+#endif
+
+static struct pattern_info search_info;
+static struct pattern_info filter_info;
+
+/*
+ * Are there any uppercase letters in this string?
+ */
+ static int
+is_ucase(str)
+ char *str;
+{
+ char *str_end = str + strlen(str);
+ LWCHAR ch;
+
+ while (str < str_end)
+ {
+ ch = step_char(&str, +1, str_end);
+ if (IS_UPPER(ch))
+ return (1);
+ }
+ return (0);
+}
+
+/*
+ * Compile and save a search pattern.
+ */
+ static int
+set_pattern(info, pattern, search_type)
+ struct pattern_info *info;
+ char *pattern;
+ int search_type;
+{
+#if !NO_REGEX
+ if (pattern == NULL)
+ CLEAR_PATTERN(info->compiled);
+ else if (compile_pattern(pattern, search_type, &info->compiled) < 0)
+ return -1;
+#endif
+ /* Pattern compiled successfully; save the text too. */
+ if (info->text != NULL)
+ free(info->text);
+ info->text = NULL;
+ if (pattern != NULL)
+ {
+ info->text = (char *) ecalloc(1, strlen(pattern)+1);
+ strcpy(info->text, pattern);
+ }
+ info->search_type = search_type;
+
+ /*
+ * Ignore case if -I is set OR
+ * -i is set AND the pattern is all lowercase.
+ */
+ is_ucase_pattern = is_ucase(pattern);
+ if (is_ucase_pattern && caseless != OPT_ONPLUS)
+ is_caseless = 0;
+ else
+ is_caseless = caseless;
+ return 0;
+}
+
+/*
+ * Discard a saved pattern.
+ */
+ static void
+clear_pattern(info)
+ struct pattern_info *info;
+{
+ if (info->text != NULL)
+ free(info->text);
+ info->text = NULL;
+#if !NO_REGEX
+ uncompile_pattern(&info->compiled);
+#endif
+}
+
+/*
+ * Initialize saved pattern to nothing.
+ */
+ static void
+init_pattern(info)
+ struct pattern_info *info;
+{
+ CLEAR_PATTERN(info->compiled);
+ info->text = NULL;
+ info->search_type = 0;
+}
+
+/*
+ * Initialize search variables.
+ */
+ public void
+init_search()
+{
+ init_pattern(&search_info);
+ init_pattern(&filter_info);
+}
+
+/*
+ * Determine which text conversions to perform before pattern matching.
+ */
+ static int
+get_cvt_ops()
+{
+ int ops = 0;
+ if (is_caseless || bs_mode == BS_SPECIAL)
+ {
+ if (is_caseless)
+ ops |= CVT_TO_LC;
+ if (bs_mode == BS_SPECIAL)
+ ops |= CVT_BS;
+ if (bs_mode != BS_CONTROL)
+ ops |= CVT_CRLF;
+ } else if (bs_mode != BS_CONTROL)
+ {
+ ops |= CVT_CRLF;
+ }
+ if (ctldisp == OPT_ONPLUS)
+ ops |= CVT_ANSI;
+ return (ops);
+}
+
+/*
+ * Is there a previous (remembered) search pattern?
+ */
+ static int
+prev_pattern(info)
+ struct pattern_info *info;
+{
+#if !NO_REGEX
+ if ((info->search_type & SRCH_NO_REGEX) == 0)
+ return (!is_null_pattern(info->compiled));
+#endif
+ return (info->text != NULL);
+}
+
+#if HILITE_SEARCH
+/*
+ * Repaint the hilites currently displayed on the screen.
+ * Repaint each line which contains highlighted text.
+ * If on==0, force all hilites off.
+ */
+ public void
+repaint_hilite(on)
+ int on;
+{
+ int slinenum;
+ POSITION pos;
+ int save_hide_hilite;
+
+ if (squished)
+ repaint();
+
+ save_hide_hilite = hide_hilite;
+ if (!on)
+ {
+ if (hide_hilite)
+ return;
+ hide_hilite = 1;
+ }
+
+ if (!can_goto_line)
+ {
+ repaint();
+ hide_hilite = save_hide_hilite;
+ return;
+ }
+
+ for (slinenum = TOP; slinenum < TOP + sc_height-1; slinenum++)
+ {
+ pos = position(slinenum);
+ if (pos == NULL_POSITION)
+ continue;
+ (void) forw_line(pos);
+ goto_line(slinenum);
+ put_line();
+ }
+ lower_left();
+ hide_hilite = save_hide_hilite;
+}
+
+/*
+ * Clear the attn hilite.
+ */
+ public void
+clear_attn()
+{
+ int slinenum;
+ POSITION old_start_attnpos;
+ POSITION old_end_attnpos;
+ POSITION pos;
+ POSITION epos;
+ int moved = 0;
+
+ if (start_attnpos == NULL_POSITION)
+ return;
+ old_start_attnpos = start_attnpos;
+ old_end_attnpos = end_attnpos;
+ start_attnpos = end_attnpos = NULL_POSITION;
+
+ if (!can_goto_line)
+ {
+ repaint();
+ return;
+ }
+ if (squished)
+ repaint();
+
+ for (slinenum = TOP; slinenum < TOP + sc_height-1; slinenum++)
+ {
+ pos = position(slinenum);
+ if (pos == NULL_POSITION)
+ continue;
+ epos = position(slinenum+1);
+ if (pos < old_end_attnpos &&
+ (epos == NULL_POSITION || epos > old_start_attnpos))
+ {
+ (void) forw_line(pos);
+ goto_line(slinenum);
+ put_line();
+ moved = 1;
+ }
+ }
+ if (moved)
+ lower_left();
+}
+#endif
+
+/*
+ * Hide search string highlighting.
+ */
+ public void
+undo_search()
+{
+ if (!prev_pattern(&search_info))
+ {
+ error("No previous regular expression", NULL_PARG);
+ return;
+ }
+#if HILITE_SEARCH
+ hide_hilite = !hide_hilite;
+ repaint_hilite(1);
+#endif
+}
+
+#if HILITE_SEARCH
+/*
+ * Clear the hilite list.
+ */
+ public void
+clr_hlist(anchor)
+ struct hilite_tree *anchor;
+{
+ struct hilite_storage *hls;
+ struct hilite_storage *nexthls;
+
+ for (hls = anchor->first; hls != NULL; hls = nexthls)
+ {
+ nexthls = hls->next;
+ free((void*)hls->nodes);
+ free((void*)hls);
+ }
+ anchor->first = NULL;
+ anchor->current = NULL;
+ anchor->root = NULL;
+
+ anchor->lookaside = NULL;
+
+ prep_startpos = prep_endpos = NULL_POSITION;
+}
+
+ public void
+clr_hilite()
+{
+ clr_hlist(&hilite_anchor);
+}
+
+ public void
+clr_filter()
+{
+ clr_hlist(&filter_anchor);
+}
+
+ struct hilite_node*
+hlist_last(anchor)
+ struct hilite_tree *anchor;
+{
+ struct hilite_node *n = anchor->root;
+ while (n != NULL && n->right != NULL)
+ n = n->right;
+ return n;
+}
+
+ struct hilite_node*
+hlist_next(n)
+ struct hilite_node *n;
+{
+ return n->next;
+}
+
+ struct hilite_node*
+hlist_prev(n)
+ struct hilite_node *n;
+{
+ return n->prev;
+}
+
+/*
+ * Find the node covering pos, or the node after it if no node covers it,
+ * or return NULL if pos is after the last range. Remember the found node,
+ * to speed up subsequent searches for the same or similar positions (if
+ * we return NULL, remember the last node.)
+ */
+ struct hilite_node*
+hlist_find(anchor, pos)
+ struct hilite_tree *anchor;
+ POSITION pos;
+{
+ struct hilite_node *n, *m;
+
+ if (anchor->lookaside)
+ {
+ int steps = 0;
+ int hit = 0;
+
+ n = anchor->lookaside;
+
+ for (;;)
+ {
+ if (pos < n->r.hl_endpos)
+ {
+ if (n->prev == NULL || pos >= n->prev->r.hl_endpos)
+ {
+ hit = 1;
+ break;
+ }
+ } else if (n->next == NULL)
+ {
+ n = NULL;
+ hit = 1;
+ break;
+ }
+
+ /*
+ * If we don't find the right node within a small
+ * distance, don't keep doing a linear search!
+ */
+ if (steps >= HILITE_LOOKASIDE_STEPS)
+ break;
+ steps++;
+
+ if (pos < n->r.hl_endpos)
+ anchor->lookaside = n = n->prev;
+ else
+ anchor->lookaside = n = n->next;
+ }
+
+ if (hit)
+ return n;
+ }
+
+ n = anchor->root;
+ m = NULL;
+
+ while (n != NULL)
+ {
+ if (pos < n->r.hl_startpos)
+ {
+ if (n->left != NULL)
+ {
+ m = n;
+ n = n->left;
+ continue;
+ }
+ break;
+ }
+ if (pos >= n->r.hl_endpos)
+ {
+ if (n->right != NULL)
+ {
+ n = n->right;
+ continue;
+ }
+ if (m != NULL)
+ {
+ n = m;
+ } else
+ {
+ m = n;
+ n = NULL;
+ }
+ }
+ break;
+ }
+
+ if (n != NULL)
+ anchor->lookaside = n;
+ else if (m != NULL)
+ anchor->lookaside = m;
+
+ return n;
+}
+
+/*
+ * Should any characters in a specified range be highlighted?
+ */
+ static int
+is_hilited_range(pos, epos)
+ POSITION pos;
+ POSITION epos;
+{
+ struct hilite_node *n = hlist_find(&hilite_anchor, pos);
+ return (n != NULL && (epos == NULL_POSITION || epos > n->r.hl_startpos));
+}
+
+/*
+ * Is a line "filtered" -- that is, should it be hidden?
+ */
+ public int
+is_filtered(pos)
+ POSITION pos;
+{
+ struct hilite_node *n;
+
+ if (ch_getflags() & CH_HELPFILE)
+ return (0);
+
+ n = hlist_find(&filter_anchor, pos);
+ return (n != NULL && pos >= n->r.hl_startpos);
+}
+
+/*
+ * If pos is hidden, return the next position which isn't, otherwise
+ * just return pos.
+ */
+ public POSITION
+next_unfiltered(pos)
+ POSITION pos;
+{
+ struct hilite_node *n;
+
+ if (ch_getflags() & CH_HELPFILE)
+ return (pos);
+
+ n = hlist_find(&filter_anchor, pos);
+ while (n != NULL && pos >= n->r.hl_startpos)
+ {
+ pos = n->r.hl_endpos;
+ n = n->next;
+ }
+ return (pos);
+}
+
+/*
+ * If pos is hidden, return the previous position which isn't or 0 if
+ * we're filtered right to the beginning, otherwise just return pos.
+ */
+ public POSITION
+prev_unfiltered(pos)
+ POSITION pos;
+{
+ struct hilite_node *n;
+
+ if (ch_getflags() & CH_HELPFILE)
+ return (pos);
+
+ n = hlist_find(&filter_anchor, pos);
+ while (n != NULL && pos >= n->r.hl_startpos)
+ {
+ pos = n->r.hl_startpos;
+ if (pos == 0)
+ break;
+ pos--;
+ n = n->prev;
+ }
+ return (pos);
+}
+
+
+/*
+ * Should any characters in a specified range be highlighted?
+ * If nohide is nonzero, don't consider hide_hilite.
+ */
+ public int
+is_hilited(pos, epos, nohide, p_matches)
+ POSITION pos;
+ POSITION epos;
+ int nohide;
+ int *p_matches;
+{
+ int match;
+
+ if (p_matches != NULL)
+ *p_matches = 0;
+
+ if (!status_col &&
+ start_attnpos != NULL_POSITION &&
+ pos < end_attnpos &&
+ (epos == NULL_POSITION || epos > start_attnpos))
+ /*
+ * The attn line overlaps this range.
+ */
+ return (1);
+
+ match = is_hilited_range(pos, epos);
+ if (!match)
+ return (0);
+
+ if (p_matches != NULL)
+ /*
+ * Report matches, even if we're hiding highlights.
+ */
+ *p_matches = 1;
+
+ if (hilite_search == 0)
+ /*
+ * Not doing highlighting.
+ */
+ return (0);
+
+ if (!nohide && hide_hilite)
+ /*
+ * Highlighting is hidden.
+ */
+ return (0);
+
+ return (1);
+}
+
+/*
+ * Tree node storage: get the current block of nodes if it has spare
+ * capacity, or create a new one if not.
+ */
+ static struct hilite_storage*
+hlist_getstorage(anchor)
+ struct hilite_tree *anchor;
+{
+ int capacity = 1;
+ struct hilite_storage *s;
+
+ if (anchor->current)
+ {
+ if (anchor->current->used < anchor->current->capacity)
+ return anchor->current;
+ capacity = anchor->current->capacity * 2;
+ }
+
+ s = (struct hilite_storage *) ecalloc(1, sizeof(struct hilite_storage));
+ s->nodes = (struct hilite_node *) ecalloc(capacity, sizeof(struct hilite_node));
+ s->capacity = capacity;
+ s->used = 0;
+ s->next = NULL;
+ if (anchor->current)
+ anchor->current->next = s;
+ else
+ anchor->first = s;
+ anchor->current = s;
+ return s;
+}
+
+/*
+ * Tree node storage: retrieve a new empty node to be inserted into the
+ * tree.
+ */
+ static struct hilite_node*
+hlist_getnode(anchor)
+ struct hilite_tree *anchor;
+{
+ struct hilite_storage *s = hlist_getstorage(anchor);
+ return &s->nodes[s->used++];
+}
+
+/*
+ * Rotate the tree left around a pivot node.
+ */
+ static void
+hlist_rotate_left(anchor, n)
+ struct hilite_tree *anchor;
+ struct hilite_node *n;
+{
+ struct hilite_node *np = n->parent;
+ struct hilite_node *nr = n->right;
+ struct hilite_node *nrl = n->right->left;
+
+ if (np != NULL)
+ {
+ if (n == np->left)
+ np->left = nr;
+ else
+ np->right = nr;
+ } else
+ {
+ anchor->root = nr;
+ }
+ nr->left = n;
+ n->right = nrl;
+
+ nr->parent = np;
+ n->parent = nr;
+ if (nrl != NULL)
+ nrl->parent = n;
+}
+
+/*
+ * Rotate the tree right around a pivot node.
+ */
+ static void
+hlist_rotate_right(anchor, n)
+ struct hilite_tree *anchor;
+ struct hilite_node *n;
+{
+ struct hilite_node *np = n->parent;
+ struct hilite_node *nl = n->left;
+ struct hilite_node *nlr = n->left->right;
+
+ if (np != NULL)
+ {
+ if (n == np->right)
+ np->right = nl;
+ else
+ np->left = nl;
+ } else
+ {
+ anchor->root = nl;
+ }
+ nl->right = n;
+ n->left = nlr;
+
+ nl->parent = np;
+ n->parent = nl;
+ if (nlr != NULL)
+ nlr->parent = n;
+}
+
+
+/*
+ * Add a new hilite to a hilite list.
+ */
+ static void
+add_hilite(anchor, hl)
+ struct hilite_tree *anchor;
+ struct hilite *hl;
+{
+ struct hilite_node *p, *n, *u;
+
+ /* Ignore empty ranges. */
+ if (hl->hl_startpos >= hl->hl_endpos)
+ return;
+
+ p = anchor->root;
+
+ /* Inserting the very first node is trivial. */
+ if (p == NULL)
+ {
+ n = hlist_getnode(anchor);
+ n->r = *hl;
+ anchor->root = n;
+ anchor->lookaside = n;
+ return;
+ }
+
+ /*
+ * Find our insertion point. If we come across any overlapping
+ * or adjoining existing ranges, shrink our range and discard
+ * if it become empty.
+ */
+ for (;;)
+ {
+ if (hl->hl_startpos < p->r.hl_startpos)
+ {
+ if (hl->hl_endpos > p->r.hl_startpos)
+ hl->hl_endpos = p->r.hl_startpos;
+ if (p->left != NULL)
+ {
+ p = p->left;
+ continue;
+ }
+ break;
+ }
+ if (hl->hl_startpos < p->r.hl_endpos) {
+ hl->hl_startpos = p->r.hl_endpos;
+ if (hl->hl_startpos >= hl->hl_endpos)
+ return;
+ }
+ if (p->right != NULL)
+ {
+ p = p->right;
+ continue;
+ }
+ break;
+ }
+
+ /*
+ * Now we're at the right leaf, again check for contiguous ranges
+ * and extend the existing node if possible to avoid the
+ * insertion. Otherwise insert a new node at the leaf.
+ */
+ if (hl->hl_startpos < p->r.hl_startpos) {
+ if (hl->hl_endpos == p->r.hl_startpos)
+ {
+ p->r.hl_startpos = hl->hl_startpos;
+ return;
+ }
+ if (p->prev != NULL && p->prev->r.hl_endpos == hl->hl_startpos)
+ {
+ p->prev->r.hl_endpos = hl->hl_endpos;
+ return;
+ }
+
+ p->left = n = hlist_getnode(anchor);
+ n->next = p;
+ if (p->prev != NULL)
+ {
+ n->prev = p->prev;
+ p->prev->next = n;
+ }
+ p->prev = n;
+ } else {
+ if (p->r.hl_endpos == hl->hl_startpos)
+ {
+ p->r.hl_endpos = hl->hl_endpos;
+ return;
+ }
+ if (p->next != NULL && hl->hl_endpos == p->next->r.hl_startpos) {
+ p->next->r.hl_startpos = hl->hl_startpos;
+ return;
+ }
+
+ p->right = n = hlist_getnode(anchor);
+ n->prev = p;
+ if (p->next != NULL)
+ {
+ n->next = p->next;
+ p->next->prev = n;
+ }
+ p->next = n;
+ }
+ n->parent = p;
+ n->red = 1;
+ n->r = *hl;
+
+ /*
+ * The tree is in the correct order and covers the right ranges
+ * now, but may have become unbalanced. Rebalance it using the
+ * standard red-black tree constraints and operations.
+ */
+ for (;;)
+ {
+ /* case 1 - current is root, root is always black */
+ if (n->parent == NULL)
+ {
+ n->red = 0;
+ break;
+ }
+
+ /* case 2 - parent is black, we can always be red */
+ if (!n->parent->red)
+ break;
+
+ /*
+ * constraint: because the root must be black, if our
+ * parent is red it cannot be the root therefore we must
+ * have a grandparent
+ */
+
+ /*
+ * case 3 - parent and uncle are red, repaint them black,
+ * the grandparent red, and start again at the grandparent.
+ */
+ u = n->parent->parent->left;
+ if (n->parent == u)
+ u = n->parent->parent->right;
+ if (u != NULL && u->red)
+ {
+ n->parent->red = 0;
+ u->red = 0;
+ n = n->parent->parent;
+ n->red = 1;
+ continue;
+ }
+
+ /*
+ * case 4 - parent is red but uncle is black, parent and
+ * grandparent on opposite sides. We need to start
+ * changing the structure now. This and case 5 will shorten
+ * our branch and lengthen the sibling, between them
+ * restoring balance.
+ */
+ if (n == n->parent->right &&
+ n->parent == n->parent->parent->left)
+ {
+ hlist_rotate_left(anchor, n->parent);
+ n = n->left;
+ } else if (n == n->parent->left &&
+ n->parent == n->parent->parent->right)
+ {
+ hlist_rotate_right(anchor, n->parent);
+ n = n->right;
+ }
+
+ /*
+ * case 5 - parent is red but uncle is black, parent and
+ * grandparent on same side
+ */
+ n->parent->red = 0;
+ n->parent->parent->red = 1;
+ if (n == n->parent->left)
+ hlist_rotate_right(anchor, n->parent->parent);
+ else
+ hlist_rotate_left(anchor, n->parent->parent);
+ break;
+ }
+}
+
+/*
+ * Hilight every character in a range of displayed characters.
+ */
+ static void
+create_hilites(linepos, start_index, end_index, chpos)
+ POSITION linepos;
+ int start_index;
+ int end_index;
+ int *chpos;
+{
+ struct hilite hl;
+ int i;
+
+ /* Start the first hilite. */
+ hl.hl_startpos = linepos + chpos[start_index];
+
+ /*
+ * Step through the displayed chars.
+ * If the source position (before cvt) of the char is one more
+ * than the source pos of the previous char (the usual case),
+ * just increase the size of the current hilite by one.
+ * Otherwise (there are backspaces or something involved),
+ * finish the current hilite and start a new one.
+ */
+ for (i = start_index+1; i <= end_index; i++)
+ {
+ if (chpos[i] != chpos[i-1] + 1 || i == end_index)
+ {
+ hl.hl_endpos = linepos + chpos[i-1] + 1;
+ add_hilite(&hilite_anchor, &hl);
+ /* Start new hilite unless this is the last char. */
+ if (i < end_index)
+ {
+ hl.hl_startpos = linepos + chpos[i];
+ }
+ }
+ }
+}
+
+/*
+ * Make a hilite for each string in a physical line which matches
+ * the current pattern.
+ * sp,ep delimit the first match already found.
+ */
+ static void
+hilite_line(linepos, line, line_len, chpos, sp, ep, cvt_ops)
+ POSITION linepos;
+ char *line;
+ int line_len;
+ int *chpos;
+ char *sp;
+ char *ep;
+ int cvt_ops;
+{
+ char *searchp;
+ char *line_end = line + line_len;
+
+ /*
+ * sp and ep delimit the first match in the line.
+ * Mark the corresponding file positions, then
+ * look for further matches and mark them.
+ * {{ This technique, of calling match_pattern on subsequent
+ * substrings of the line, may mark more than is correct
+ * if the pattern starts with "^". This bug is fixed
+ * for those regex functions that accept a notbol parameter
+ * (currently POSIX, PCRE and V8-with-regexec2). }}
+ */
+ searchp = line;
+ do {
+ if (sp == NULL || ep == NULL)
+ return;
+ create_hilites(linepos, sp-line, ep-line, chpos);
+ /*
+ * If we matched more than zero characters,
+ * move to the first char after the string we matched.
+ * If we matched zero, just move to the next char.
+ */
+ if (ep > searchp)
+ searchp = ep;
+ else if (searchp != line_end)
+ searchp++;
+ else /* end of line */
+ break;
+ } while (match_pattern(info_compiled(&search_info), search_info.text,
+ searchp, line_end - searchp, &sp, &ep, 1, search_info.search_type));
+}
+#endif
+
+/*
+ * Change the caseless-ness of searches.
+ * Updates the internal search state to reflect a change in the -i flag.
+ */
+ public void
+chg_caseless()
+{
+ if (!is_ucase_pattern)
+ /*
+ * Pattern did not have uppercase.
+ * Just set the search caselessness to the global caselessness.
+ */
+ is_caseless = caseless;
+ else
+ /*
+ * Pattern did have uppercase.
+ * Discard the pattern; we can't change search caselessness now.
+ */
+ clear_pattern(&search_info);
+}
+
+#if HILITE_SEARCH
+/*
+ * Find matching text which is currently on screen and highlight it.
+ */
+ static void
+hilite_screen()
+{
+ struct scrpos scrpos;
+
+ get_scrpos(&scrpos);
+ if (scrpos.pos == NULL_POSITION)
+ return;
+ prep_hilite(scrpos.pos, position(BOTTOM_PLUS_ONE), -1);
+ repaint_hilite(1);
+}
+
+/*
+ * Change highlighting parameters.
+ */
+ public void
+chg_hilite()
+{
+ /*
+ * Erase any highlights currently on screen.
+ */
+ clr_hilite();
+ hide_hilite = 0;
+
+ if (hilite_search == OPT_ONPLUS)
+ /*
+ * Display highlights.
+ */
+ hilite_screen();
+}
+#endif
+
+/*
+ * Figure out where to start a search.
+ */
+ static POSITION
+search_pos(search_type)
+ int search_type;
+{
+ POSITION pos;
+ int linenum;
+
+ if (empty_screen())
+ {
+ /*
+ * Start at the beginning (or end) of the file.
+ * The empty_screen() case is mainly for
+ * command line initiated searches;
+ * for example, "+/xyz" on the command line.
+ * Also for multi-file (SRCH_PAST_EOF) searches.
+ */
+ if (search_type & SRCH_FORW)
+ {
+ pos = ch_zero();
+ } else
+ {
+ pos = ch_length();
+ if (pos == NULL_POSITION)
+ {
+ (void) ch_end_seek();
+ pos = ch_length();
+ }
+ }
+ linenum = 0;
+ } else
+ {
+ int add_one = 0;
+
+ if (how_search == OPT_ON)
+ {
+ /*
+ * Search does not include current screen.
+ */
+ if (search_type & SRCH_FORW)
+ linenum = BOTTOM_PLUS_ONE;
+ else
+ linenum = TOP;
+ } else if (how_search == OPT_ONPLUS && !(search_type & SRCH_AFTER_TARGET))
+ {
+ /*
+ * Search includes all of displayed screen.
+ */
+ if (search_type & SRCH_FORW)
+ linenum = TOP;
+ else
+ linenum = BOTTOM_PLUS_ONE;
+ } else
+ {
+ /*
+ * Search includes the part of current screen beyond the jump target.
+ * It starts at the jump target (if searching backwards),
+ * or at the jump target plus one (if forwards).
+ */
+ linenum = adjsline(jump_sline);
+ if (search_type & SRCH_FORW)
+ add_one = 1;
+ }
+ pos = position(linenum);
+ if (add_one)
+ pos = forw_raw_line(pos, (char **)NULL, (int *)NULL);
+ }
+
+ /*
+ * If the line is empty, look around for a plausible starting place.
+ */
+ if (search_type & SRCH_FORW)
+ {
+ while (pos == NULL_POSITION)
+ {
+ if (++linenum >= sc_height)
+ break;
+ pos = position(linenum);
+ }
+ } else
+ {
+ while (pos == NULL_POSITION)
+ {
+ if (--linenum < 0)
+ break;
+ pos = position(linenum);
+ }
+ }
+ return (pos);
+}
+
+/*
+ * Search a subset of the file, specified by start/end position.
+ */
+ static int
+search_range(pos, endpos, search_type, matches, maxlines, plinepos, pendpos)
+ POSITION pos;
+ POSITION endpos;
+ int search_type;
+ int matches;
+ int maxlines;
+ POSITION *plinepos;
+ POSITION *pendpos;
+{
+ char *line;
+ char *cline;
+ int line_len;
+ LINENUM linenum;
+ char *sp, *ep;
+ int line_match;
+ int cvt_ops;
+ int cvt_len;
+ int *chpos;
+ POSITION linepos, oldpos;
+
+ linenum = find_linenum(pos);
+ oldpos = pos;
+ for (;;)
+ {
+ /*
+ * Get lines until we find a matching one or until
+ * we hit end-of-file (or beginning-of-file if we're
+ * going backwards), or until we hit the end position.
+ */
+ if (ABORT_SIGS())
+ {
+ /*
+ * A signal aborts the search.
+ */
+ return (-1);
+ }
+
+ if ((endpos != NULL_POSITION && pos >= endpos) || maxlines == 0)
+ {
+ /*
+ * Reached end position without a match.
+ */
+ if (pendpos != NULL)
+ *pendpos = pos;
+ return (matches);
+ }
+ if (maxlines > 0)
+ maxlines--;
+
+ if (search_type & SRCH_FORW)
+ {
+ /*
+ * Read the next line, and save the
+ * starting position of that line in linepos.
+ */
+ linepos = pos;
+ pos = forw_raw_line(pos, &line, &line_len);
+ if (linenum != 0)
+ linenum++;
+ } else
+ {
+ /*
+ * Read the previous line and save the
+ * starting position of that line in linepos.
+ */
+ pos = back_raw_line(pos, &line, &line_len);
+ linepos = pos;
+ if (linenum != 0)
+ linenum--;
+ }
+
+ if (pos == NULL_POSITION)
+ {
+ /*
+ * Reached EOF/BOF without a match.
+ */
+ if (pendpos != NULL)
+ *pendpos = oldpos;
+ return (matches);
+ }
+
+ /*
+ * If we're using line numbers, we might as well
+ * remember the information we have now (the position
+ * and line number of the current line).
+ * Don't do it for every line because it slows down
+ * the search. Remember the line number only if
+ * we're "far" from the last place we remembered it.
+ */
+ if (linenums && abs((int)(pos - oldpos)) > 2048)
+ add_lnum(linenum, pos);
+ oldpos = pos;
+
+ if (is_filtered(linepos))
+ continue;
+
+ /*
+ * If it's a caseless search, convert the line to lowercase.
+ * If we're doing backspace processing, delete backspaces.
+ */
+ cvt_ops = get_cvt_ops();
+ cvt_len = cvt_length(line_len, cvt_ops);
+ cline = (char *) ecalloc(1, cvt_len);
+ chpos = cvt_alloc_chpos(cvt_len);
+ cvt_text(cline, line, chpos, &line_len, cvt_ops);
+
+#if HILITE_SEARCH
+ /*
+ * Check to see if the line matches the filter pattern.
+ * If so, add an entry to the filter list.
+ */
+ if (((search_type & SRCH_FIND_ALL) ||
+ prep_startpos == NULL_POSITION ||
+ linepos < prep_startpos || linepos >= prep_endpos) &&
+ prev_pattern(&filter_info)) {
+ int line_filter = match_pattern(info_compiled(&filter_info), filter_info.text,
+ cline, line_len, &sp, &ep, 0, filter_info.search_type);
+ if (line_filter)
+ {
+ struct hilite hl;
+ hl.hl_startpos = linepos;
+ hl.hl_endpos = pos;
+ add_hilite(&filter_anchor, &hl);
+ continue;
+ }
+ }
+#endif
+
+ /*
+ * Test the next line to see if we have a match.
+ * We are successful if we either want a match and got one,
+ * or if we want a non-match and got one.
+ */
+ if (prev_pattern(&search_info))
+ {
+ line_match = match_pattern(info_compiled(&search_info), search_info.text,
+ cline, line_len, &sp, &ep, 0, search_type);
+ if (line_match)
+ {
+ /*
+ * Got a match.
+ */
+ if (search_type & SRCH_FIND_ALL)
+ {
+#if HILITE_SEARCH
+ /*
+ * We are supposed to find all matches in the range.
+ * Just add the matches in this line to the
+ * hilite list and keep searching.
+ */
+ hilite_line(linepos, cline, line_len, chpos, sp, ep, cvt_ops);
+#endif
+ } else if (--matches <= 0)
+ {
+ /*
+ * Found the one match we're looking for.
+ * Return it.
+ */
+#if HILITE_SEARCH
+ if (hilite_search == OPT_ON)
+ {
+ /*
+ * Clear the hilite list and add only
+ * the matches in this one line.
+ */
+ clr_hilite();
+ hilite_line(linepos, cline, line_len, chpos, sp, ep, cvt_ops);
+ }
+#endif
+ free(cline);
+ free(chpos);
+ if (plinepos != NULL)
+ *plinepos = linepos;
+ return (0);
+ }
+ }
+ }
+ free(cline);
+ free(chpos);
+ }
+}
+
+/*
+ * search for a pattern in history. If found, compile that pattern.
+ */
+ static int
+hist_pattern(search_type)
+ int search_type;
+{
+#if CMD_HISTORY
+ char *pattern;
+
+ set_mlist(ml_search, 0);
+ pattern = cmd_lastpattern();
+ if (pattern == NULL)
+ return (0);
+
+ if (set_pattern(&search_info, pattern, search_type) < 0)
+ return (0);
+
+#if HILITE_SEARCH
+ if (hilite_search == OPT_ONPLUS && !hide_hilite)
+ hilite_screen();
+#endif
+
+ return (1);
+#else /* CMD_HISTORY */
+ return (0);
+#endif /* CMD_HISTORY */
+}
+
+/*
+ * Search for the n-th occurrence of a specified pattern,
+ * either forward or backward.
+ * Return the number of matches not yet found in this file
+ * (that is, n minus the number of matches found).
+ * Return -1 if the search should be aborted.
+ * Caller may continue the search in another file
+ * if less than n matches are found in this file.
+ */
+ public int
+search(search_type, pattern, n)
+ int search_type;
+ char *pattern;
+ int n;
+{
+ POSITION pos;
+
+ if (pattern == NULL || *pattern == '\0')
+ {
+ /*
+ * A null pattern means use the previously compiled pattern.
+ */
+ search_type |= SRCH_AFTER_TARGET;
+ if (!prev_pattern(&search_info) && !hist_pattern(search_type))
+ {
+ error("No previous regular expression", NULL_PARG);
+ return (-1);
+ }
+ if ((search_type & SRCH_NO_REGEX) !=
+ (search_info.search_type & SRCH_NO_REGEX))
+ {
+ error("Please re-enter search pattern", NULL_PARG);
+ return -1;
+ }
+#if HILITE_SEARCH
+ if (hilite_search == OPT_ON)
+ {
+ /*
+ * Erase the highlights currently on screen.
+ * If the search fails, we'll redisplay them later.
+ */
+ repaint_hilite(0);
+ }
+ if (hilite_search == OPT_ONPLUS && hide_hilite)
+ {
+ /*
+ * Highlight any matches currently on screen,
+ * before we actually start the search.
+ */
+ hide_hilite = 0;
+ hilite_screen();
+ }
+ hide_hilite = 0;
+#endif
+ } else
+ {
+ /*
+ * Compile the pattern.
+ */
+ if (set_pattern(&search_info, pattern, search_type) < 0)
+ return (-1);
+#if HILITE_SEARCH
+ if (hilite_search)
+ {
+ /*
+ * Erase the highlights currently on screen.
+ * Also permanently delete them from the hilite list.
+ */
+ repaint_hilite(0);
+ hide_hilite = 0;
+ clr_hilite();
+ }
+ if (hilite_search == OPT_ONPLUS)
+ {
+ /*
+ * Highlight any matches currently on screen,
+ * before we actually start the search.
+ */
+ hilite_screen();
+ }
+#endif
+ }
+
+ /*
+ * Figure out where to start the search.
+ */
+ pos = search_pos(search_type);
+ if (pos == NULL_POSITION)
+ {
+ /*
+ * Can't find anyplace to start searching from.
+ */
+ if (search_type & SRCH_PAST_EOF)
+ return (n);
+ /* repaint(); -- why was this here? */
+ error("Nothing to search", NULL_PARG);
+ return (-1);
+ }
+
+ n = search_range(pos, NULL_POSITION, search_type, n, -1,
+ &pos, (POSITION*)NULL);
+ if (n != 0)
+ {
+ /*
+ * Search was unsuccessful.
+ */
+#if HILITE_SEARCH
+ if (hilite_search == OPT_ON && n > 0)
+ /*
+ * Redisplay old hilites.
+ */
+ repaint_hilite(1);
+#endif
+ return (n);
+ }
+
+ if (!(search_type & SRCH_NO_MOVE))
+ {
+ /*
+ * Go to the matching line.
+ */
+ jump_loc(pos, jump_sline);
+ }
+
+#if HILITE_SEARCH
+ if (hilite_search == OPT_ON)
+ /*
+ * Display new hilites in the matching line.
+ */
+ repaint_hilite(1);
+#endif
+ return (0);
+}
+
+
+#if HILITE_SEARCH
+/*
+ * Prepare hilites in a given range of the file.
+ *
+ * The pair (prep_startpos,prep_endpos) delimits a contiguous region
+ * of the file that has been "prepared"; that is, scanned for matches for
+ * the current search pattern, and hilites have been created for such matches.
+ * If prep_startpos == NULL_POSITION, the prep region is empty.
+ * If prep_endpos == NULL_POSITION, the prep region extends to EOF.
+ * prep_hilite asks that the range (spos,epos) be covered by the prep region.
+ */
+ public void
+prep_hilite(spos, epos, maxlines)
+ POSITION spos;
+ POSITION epos;
+ int maxlines;
+{
+ POSITION nprep_startpos = prep_startpos;
+ POSITION nprep_endpos = prep_endpos;
+ POSITION new_epos;
+ POSITION max_epos;
+ int result;
+ int i;
+
+/*
+ * Search beyond where we're asked to search, so the prep region covers
+ * more than we need. Do one big search instead of a bunch of small ones.
+ */
+#define SEARCH_MORE (3*size_linebuf)
+
+ if (!prev_pattern(&search_info) && !is_filtering())
+ return;
+
+ /*
+ * Make sure our prep region always starts at the beginning of
+ * a line. (search_range takes care of the end boundary below.)
+ */
+ spos = back_raw_line(spos+1, (char **)NULL, (int *)NULL);
+
+ /*
+ * If we're limited to a max number of lines, figure out the
+ * file position we should stop at.
+ */
+ if (maxlines < 0)
+ max_epos = NULL_POSITION;
+ else
+ {
+ max_epos = spos;
+ for (i = 0; i < maxlines; i++)
+ max_epos = forw_raw_line(max_epos, (char **)NULL, (int *)NULL);
+ }
+
+ /*
+ * Find two ranges:
+ * The range that we need to search (spos,epos); and the range that
+ * the "prep" region will then cover (nprep_startpos,nprep_endpos).
+ */
+
+ if (prep_startpos == NULL_POSITION ||
+ (epos != NULL_POSITION && epos < prep_startpos) ||
+ spos > prep_endpos)
+ {
+ /*
+ * New range is not contiguous with old prep region.
+ * Discard the old prep region and start a new one.
+ */
+ clr_hilite();
+ clr_filter();
+ if (epos != NULL_POSITION)
+ epos += SEARCH_MORE;
+ nprep_startpos = spos;
+ } else
+ {
+ /*
+ * New range partially or completely overlaps old prep region.
+ */
+ if (epos == NULL_POSITION)
+ {
+ /*
+ * New range goes to end of file.
+ */
+ ;
+ } else if (epos > prep_endpos)
+ {
+ /*
+ * New range ends after old prep region.
+ * Extend prep region to end at end of new range.
+ */
+ epos += SEARCH_MORE;
+ } else /* (epos <= prep_endpos) */
+ {
+ /*
+ * New range ends within old prep region.
+ * Truncate search to end at start of old prep region.
+ */
+ epos = prep_startpos;
+ }
+
+ if (spos < prep_startpos)
+ {
+ /*
+ * New range starts before old prep region.
+ * Extend old prep region backwards to start at
+ * start of new range.
+ */
+ if (spos < SEARCH_MORE)
+ spos = 0;
+ else
+ spos -= SEARCH_MORE;
+ nprep_startpos = spos;
+ } else /* (spos >= prep_startpos) */
+ {
+ /*
+ * New range starts within or after old prep region.
+ * Trim search to start at end of old prep region.
+ */
+ spos = prep_endpos;
+ }
+ }
+
+ if (epos != NULL_POSITION && max_epos != NULL_POSITION &&
+ epos > max_epos)
+ /*
+ * Don't go past the max position we're allowed.
+ */
+ epos = max_epos;
+
+ if (epos == NULL_POSITION || epos > spos)
+ {
+ int search_type = SRCH_FORW | SRCH_FIND_ALL;
+ search_type |= (search_info.search_type & SRCH_NO_REGEX);
+ for (;;)
+ {
+ result = search_range(spos, epos, search_type, 0, maxlines, (POSITION*)NULL, &new_epos);
+ if (result < 0)
+ return;
+ if (prep_endpos == NULL_POSITION || new_epos > prep_endpos)
+ nprep_endpos = new_epos;
+
+ /*
+ * Check both ends of the resulting prep region to
+ * make sure they're not filtered. If they are,
+ * keep going at least one more line until we find
+ * something that isn't filtered, or hit the end.
+ */
+ if (prep_endpos == NULL_POSITION || nprep_endpos > prep_endpos)
+ {
+ if (new_epos >= nprep_endpos && is_filtered(new_epos-1))
+ {
+ spos = nprep_endpos;
+ epos = forw_raw_line(nprep_endpos, (char **)NULL, (int *)NULL);
+ if (epos == NULL_POSITION)
+ break;
+ maxlines = 1;
+ continue;
+ }
+ }
+
+ if (prep_startpos == NULL_POSITION || nprep_startpos < prep_startpos)
+ {
+ if (nprep_startpos > 0 && is_filtered(nprep_startpos))
+ {
+ epos = nprep_startpos;
+ spos = back_raw_line(nprep_startpos, (char **)NULL, (int *)NULL);
+ if (spos == NULL_POSITION)
+ break;
+ nprep_startpos = spos;
+ maxlines = 1;
+ continue;
+ }
+ }
+ break;
+ }
+ }
+ prep_startpos = nprep_startpos;
+ prep_endpos = nprep_endpos;
+}
+
+/*
+ * Set the pattern to be used for line filtering.
+ */
+ public void
+set_filter_pattern(pattern, search_type)
+ char *pattern;
+ int search_type;
+{
+ clr_filter();
+ if (pattern == NULL || *pattern == '\0')
+ clear_pattern(&filter_info);
+ else
+ set_pattern(&filter_info, pattern, search_type);
+ screen_trashed = 1;
+}
+
+/*
+ * Is there a line filter in effect?
+ */
+ public int
+is_filtering()
+{
+ if (ch_getflags() & CH_HELPFILE)
+ return (0);
+ return prev_pattern(&filter_info);
+}
+#endif
+
+#if HAVE_V8_REGCOMP
+/*
+ * This function is called by the V8 regcomp to report
+ * errors in regular expressions.
+ */
+public int reg_show_error = 1;
+
+ void
+regerror(s)
+ char *s;
+{
+ PARG parg;
+
+ if (!reg_show_error)
+ return;
+ parg.p_string = s;
+ error("%s", &parg);
+}
+#endif
+
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines dealing with signals.
+ *
+ * A signal usually merely causes a bit to be set in the "signals" word.
+ * At some convenient time, the mainline code checks to see if any
+ * signals need processing by calling psignal().
+ * If we happen to be reading from a file [in iread()] at the time
+ * the signal is received, we call intread to interrupt the iread.
+ */
+
+#include "less.h"
+#include <signal.h>
+
+/*
+ * "sigs" contains bits indicating signals which need to be processed.
+ */
+public int sigs;
+
+extern int sc_width, sc_height;
+extern int screen_trashed;
+extern int lnloop;
+extern int linenums;
+extern int wscroll;
+extern int reading;
+extern int quit_on_intr;
+extern long jump_sline_fraction;
+
+/*
+ * Interrupt signal handler.
+ */
+ /* ARGSUSED*/
+ static RETSIGTYPE
+u_interrupt(type)
+ int type;
+{
+ bell();
+#if OS2
+ LSIGNAL(SIGINT, SIG_ACK);
+#endif
+ LSIGNAL(SIGINT, u_interrupt);
+ sigs |= S_INTERRUPT;
+#if MSDOS_COMPILER==DJGPPC
+ /*
+ * If a keyboard has been hit, it must be Ctrl-C
+ * (as opposed to Ctrl-Break), so consume it.
+ * (Otherwise, Less will beep when it sees Ctrl-C from keyboard.)
+ */
+ if (kbhit())
+ getkey();
+#endif
+ if (reading)
+ intread(); /* May longjmp */
+}
+
+#ifdef SIGTSTP
+/*
+ * "Stop" (^Z) signal handler.
+ */
+ /* ARGSUSED*/
+ static RETSIGTYPE
+stop(type)
+ int type;
+{
+ LSIGNAL(SIGTSTP, stop);
+ sigs |= S_STOP;
+ if (reading)
+ intread();
+}
+#endif
+
+#ifdef SIGWINCH
+/*
+ * "Window" change handler
+ */
+ /* ARGSUSED*/
+ public RETSIGTYPE
+winch(type)
+ int type;
+{
+ LSIGNAL(SIGWINCH, winch);
+ sigs |= S_WINCH;
+ if (reading)
+ intread();
+}
+#else
+#ifdef SIGWIND
+/*
+ * "Window" change handler
+ */
+ /* ARGSUSED*/
+ public RETSIGTYPE
+winch(type)
+ int type;
+{
+ LSIGNAL(SIGWIND, winch);
+ sigs |= S_WINCH;
+ if (reading)
+ intread();
+}
+#endif
+#endif
+
+#if MSDOS_COMPILER==WIN32C
+/*
+ * Handle CTRL-C and CTRL-BREAK keys.
+ */
+#include "windows.h"
+
+ static BOOL WINAPI
+wbreak_handler(dwCtrlType)
+ DWORD dwCtrlType;
+{
+ switch (dwCtrlType)
+ {
+ case CTRL_C_EVENT:
+ case CTRL_BREAK_EVENT:
+ sigs |= S_INTERRUPT;
+ return (TRUE);
+ default:
+ break;
+ }
+ return (FALSE);
+}
+#endif
+
+/*
+ * Set up the signal handlers.
+ */
+ public void
+init_signals(on)
+ int on;
+{
+ if (on)
+ {
+ /*
+ * Set signal handlers.
+ */
+ (void) LSIGNAL(SIGINT, u_interrupt);
+#if MSDOS_COMPILER==WIN32C
+ SetConsoleCtrlHandler(wbreak_handler, TRUE);
+#endif
+#ifdef SIGTSTP
+ (void) LSIGNAL(SIGTSTP, stop);
+#endif
+#ifdef SIGWINCH
+ (void) LSIGNAL(SIGWINCH, winch);
+#endif
+#ifdef SIGWIND
+ (void) LSIGNAL(SIGWIND, winch);
+#endif
+#ifdef SIGQUIT
+ (void) LSIGNAL(SIGQUIT, SIG_IGN);
+#endif
+ } else
+ {
+ /*
+ * Restore signals to defaults.
+ */
+ (void) LSIGNAL(SIGINT, SIG_DFL);
+#if MSDOS_COMPILER==WIN32C
+ SetConsoleCtrlHandler(wbreak_handler, FALSE);
+#endif
+#ifdef SIGTSTP
+ (void) LSIGNAL(SIGTSTP, SIG_DFL);
+#endif
+#ifdef SIGWINCH
+ (void) LSIGNAL(SIGWINCH, SIG_IGN);
+#endif
+#ifdef SIGWIND
+ (void) LSIGNAL(SIGWIND, SIG_IGN);
+#endif
+#ifdef SIGQUIT
+ (void) LSIGNAL(SIGQUIT, SIG_DFL);
+#endif
+ }
+}
+
+/*
+ * Process any signals we have received.
+ * A received signal cause a bit to be set in "sigs".
+ */
+ public void
+psignals()
+{
+ register int tsignals;
+
+ if ((tsignals = sigs) == 0)
+ return;
+ sigs = 0;
+
+#ifdef SIGTSTP
+ if (tsignals & S_STOP)
+ {
+ /*
+ * Clean up the terminal.
+ */
+#ifdef SIGTTOU
+ LSIGNAL(SIGTTOU, SIG_IGN);
+#endif
+ clear_bot();
+ deinit();
+ flush();
+ raw_mode(0);
+#ifdef SIGTTOU
+ LSIGNAL(SIGTTOU, SIG_DFL);
+#endif
+ LSIGNAL(SIGTSTP, SIG_DFL);
+ kill(getpid(), SIGTSTP);
+ /*
+ * ... Bye bye. ...
+ * Hopefully we'll be back later and resume here...
+ * Reset the terminal and arrange to repaint the
+ * screen when we get back to the main command loop.
+ */
+ LSIGNAL(SIGTSTP, stop);
+ raw_mode(1);
+ init();
+ screen_trashed = 1;
+ tsignals |= S_WINCH;
+ }
+#endif
+#ifdef S_WINCH
+ if (tsignals & S_WINCH)
+ {
+ int old_width, old_height;
+ /*
+ * Re-execute scrsize() to read the new window size.
+ */
+ old_width = sc_width;
+ old_height = sc_height;
+ get_term();
+ if (sc_width != old_width || sc_height != old_height)
+ {
+ wscroll = (sc_height + 1) / 2;
+ calc_jump_sline();
+ calc_shift_count();
+ screen_trashed = 1;
+ }
+ }
+#endif
+ if (tsignals & S_INTERRUPT)
+ {
+ if (quit_on_intr)
+ quit(QUIT_INTERRUPT);
+ }
+}
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+#include "less.h"
+
+#define WHITESP(c) ((c)==' ' || (c)=='\t')
+
+#if TAGS
+
+public char ztags[] = "tags";
+public char *tags = ztags;
+
+static int total;
+static int curseq;
+
+extern int linenums;
+extern int sigs;
+
+enum tag_result {
+ TAG_FOUND,
+ TAG_NOFILE,
+ TAG_NOTAG,
+ TAG_NOTYPE,
+ TAG_INTR
+};
+
+/*
+ * Tag type
+ */
+enum {
+ T_CTAGS, /* 'tags': standard and extended format (ctags) */
+ T_CTAGS_X, /* stdin: cross reference format (ctags) */
+ T_GTAGS, /* 'GTAGS': function defenition (global) */
+ T_GRTAGS, /* 'GRTAGS': function reference (global) */
+ T_GSYMS, /* 'GSYMS': other symbols (global) */
+ T_GPATH /* 'GPATH': path name (global) */
+};
+
+static enum tag_result findctag();
+static enum tag_result findgtag();
+static char *nextgtag();
+static char *prevgtag();
+static POSITION ctagsearch();
+static POSITION gtagsearch();
+static int getentry();
+
+/*
+ * The list of tags generated by the last findgtag() call.
+ *
+ * Use either pattern or line number.
+ * findgtag() always uses line number, so pattern is always NULL.
+ * findctag() uses either pattern (in which case line number is 0),
+ * or line number (in which case pattern is NULL).
+ */
+struct taglist {
+ struct tag *tl_first;
+ struct tag *tl_last;
+};
+#define TAG_END ((struct tag *) &taglist)
+static struct taglist taglist = { TAG_END, TAG_END };
+struct tag {
+ struct tag *next, *prev; /* List links */
+ char *tag_file; /* Source file containing the tag */
+ LINENUM tag_linenum; /* Appropriate line number in source file */
+ char *tag_pattern; /* Pattern used to find the tag */
+ char tag_endline; /* True if the pattern includes '$' */
+};
+static struct tag *curtag;
+
+#define TAG_INS(tp) \
+ (tp)->next = TAG_END; \
+ (tp)->prev = taglist.tl_last; \
+ taglist.tl_last->next = (tp); \
+ taglist.tl_last = (tp);
+
+#define TAG_RM(tp) \
+ (tp)->next->prev = (tp)->prev; \
+ (tp)->prev->next = (tp)->next;
+
+/*
+ * Delete tag structures.
+ */
+ public void
+cleantags()
+{
+ register struct tag *tp;
+
+ /*
+ * Delete any existing tag list.
+ * {{ Ideally, we wouldn't do this until after we know that we
+ * can load some other tag information. }}
+ */
+ while ((tp = taglist.tl_first) != TAG_END)
+ {
+ TAG_RM(tp);
+ free(tp);
+ }
+ curtag = NULL;
+ total = curseq = 0;
+}
+
+/*
+ * Create a new tag entry.
+ */
+ static struct tag *
+maketagent(name, file, linenum, pattern, endline)
+ char *name;
+ char *file;
+ LINENUM linenum;
+ char *pattern;
+ int endline;
+{
+ register struct tag *tp;
+
+ tp = (struct tag *) ecalloc(sizeof(struct tag), 1);
+ tp->tag_file = (char *) ecalloc(strlen(file) + 1, sizeof(char));
+ strcpy(tp->tag_file, file);
+ tp->tag_linenum = linenum;
+ tp->tag_endline = endline;
+ if (pattern == NULL)
+ tp->tag_pattern = NULL;
+ else
+ {
+ tp->tag_pattern = (char *) ecalloc(strlen(pattern) + 1, sizeof(char));
+ strcpy(tp->tag_pattern, pattern);
+ }
+ return (tp);
+}
+
+/*
+ * Get tag mode.
+ */
+ public int
+gettagtype()
+{
+ int f;
+
+ if (strcmp(tags, "GTAGS") == 0)
+ return T_GTAGS;
+ if (strcmp(tags, "GRTAGS") == 0)
+ return T_GRTAGS;
+ if (strcmp(tags, "GSYMS") == 0)
+ return T_GSYMS;
+ if (strcmp(tags, "GPATH") == 0)
+ return T_GPATH;
+ if (strcmp(tags, "-") == 0)
+ return T_CTAGS_X;
+ f = open(tags, OPEN_READ);
+ if (f >= 0)
+ {
+ close(f);
+ return T_CTAGS;
+ }
+ return T_GTAGS;
+}
+
+/*
+ * Find tags in tag file.
+ * Find a tag in the "tags" file.
+ * Sets "tag_file" to the name of the file containing the tag,
+ * and "tagpattern" to the search pattern which should be used
+ * to find the tag.
+ */
+ public void
+findtag(tag)
+ register char *tag;
+{
+ int type = gettagtype();
+ enum tag_result result;
+
+ if (type == T_CTAGS)
+ result = findctag(tag);
+ else
+ result = findgtag(tag, type);
+ switch (result)
+ {
+ case TAG_FOUND:
+ case TAG_INTR:
+ break;
+ case TAG_NOFILE:
+ error("No tags file", NULL_PARG);
+ break;
+ case TAG_NOTAG:
+ error("No such tag in tags file", NULL_PARG);
+ break;
+ case TAG_NOTYPE:
+ error("unknown tag type", NULL_PARG);
+ break;
+ }
+}
+
+/*
+ * Search for a tag.
+ */
+ public POSITION
+tagsearch()
+{
+ if (curtag == NULL)
+ return (NULL_POSITION); /* No gtags loaded! */
+ if (curtag->tag_linenum != 0)
+ return gtagsearch();
+ else
+ return ctagsearch();
+}
+
+/*
+ * Go to the next tag.
+ */
+ public char *
+nexttag(n)
+ int n;
+{
+ char *tagfile = (char *) NULL;
+
+ while (n-- > 0)
+ tagfile = nextgtag();
+ return tagfile;
+}
+
+/*
+ * Go to the previous tag.
+ */
+ public char *
+prevtag(n)
+ int n;
+{
+ char *tagfile = (char *) NULL;
+
+ while (n-- > 0)
+ tagfile = prevgtag();
+ return tagfile;
+}
+
+/*
+ * Return the total number of tags.
+ */
+ public int
+ntags()
+{
+ return total;
+}
+
+/*
+ * Return the sequence number of current tag.
+ */
+ public int
+curr_tag()
+{
+ return curseq;
+}
+
+/*****************************************************************************
+ * ctags
+ */
+
+/*
+ * Find tags in the "tags" file.
+ * Sets curtag to the first tag entry.
+ */
+ static enum tag_result
+findctag(tag)
+ register char *tag;
+{
+ char *p;
+ register FILE *f;
+ register int taglen;
+ LINENUM taglinenum;
+ char *tagfile;
+ char *tagpattern;
+ int tagendline;
+ int search_char;
+ int err;
+ char tline[TAGLINE_SIZE];
+ struct tag *tp;
+
+ p = shell_unquote(tags);
+ f = fopen(p, "r");
+ free(p);
+ if (f == NULL)
+ return TAG_NOFILE;
+
+ cleantags();
+ total = 0;
+ taglen = (int) strlen(tag);
+
+ /*
+ * Search the tags file for the desired tag.
+ */
+ while (fgets(tline, sizeof(tline), f) != NULL)
+ {
+ if (tline[0] == '!')
+ /* Skip header of extended format. */
+ continue;
+ if (strncmp(tag, tline, taglen) != 0 || !WHITESP(tline[taglen]))
+ continue;
+
+ /*
+ * Found it.
+ * The line contains the tag, the filename and the
+ * location in the file, separated by white space.
+ * The location is either a decimal line number,
+ * or a search pattern surrounded by a pair of delimiters.
+ * Parse the line and extract these parts.
+ */
+ tagpattern = NULL;
+
+ /*
+ * Skip over the whitespace after the tag name.
+ */
+ p = skipsp(tline+taglen);
+ if (*p == '\0')
+ /* File name is missing! */
+ continue;
+
+ /*
+ * Save the file name.
+ * Skip over the whitespace after the file name.
+ */
+ tagfile = p;
+ while (!WHITESP(*p) && *p != '\0')
+ p++;
+ *p++ = '\0';
+ p = skipsp(p);
+ if (*p == '\0')
+ /* Pattern is missing! */
+ continue;
+
+ /*
+ * First see if it is a line number.
+ */
+ tagendline = 0;
+ taglinenum = getnum(&p, 0, &err);
+ if (err)
+ {
+ /*
+ * No, it must be a pattern.
+ * Delete the initial "^" (if present) and
+ * the final "$" from the pattern.
+ * Delete any backslash in the pattern.
+ */
+ taglinenum = 0;
+ search_char = *p++;
+ if (*p == '^')
+ p++;
+ tagpattern = p;
+ while (*p != search_char && *p != '\0')
+ {
+ if (*p == '\\')
+ p++;
+ p++;
+ }
+ tagendline = (p[-1] == '$');
+ if (tagendline)
+ p--;
+ *p = '\0';
+ }
+ tp = maketagent(tag, tagfile, taglinenum, tagpattern, tagendline);
+ TAG_INS(tp);
+ total++;
+ }
+ fclose(f);
+ if (total == 0)
+ return TAG_NOTAG;
+ curtag = taglist.tl_first;
+ curseq = 1;
+ return TAG_FOUND;
+}
+
+/*
+ * Edit current tagged file.
+ */
+ public int
+edit_tagfile()
+{
+ if (curtag == NULL)
+ return (1);
+ return (edit(curtag->tag_file));
+}
+
+/*
+ * Search for a tag.
+ * This is a stripped-down version of search().
+ * We don't use search() for several reasons:
+ * - We don't want to blow away any search string we may have saved.
+ * - The various regular-expression functions (from different systems:
+ * regcmp vs. re_comp) behave differently in the presence of
+ * parentheses (which are almost always found in a tag).
+ */
+ static POSITION
+ctagsearch()
+{
+ POSITION pos, linepos;
+ LINENUM linenum;
+ int len;
+ char *line;
+
+ pos = ch_zero();
+ linenum = find_linenum(pos);
+
+ for (;;)
+ {
+ /*
+ * Get lines until we find a matching one or
+ * until we hit end-of-file.
+ */
+ if (ABORT_SIGS())
+ return (NULL_POSITION);
+
+ /*
+ * Read the next line, and save the
+ * starting position of that line in linepos.
+ */
+ linepos = pos;
+ pos = forw_raw_line(pos, &line, (int *)NULL);
+ if (linenum != 0)
+ linenum++;
+
+ if (pos == NULL_POSITION)
+ {
+ /*
+ * We hit EOF without a match.
+ */
+ error("Tag not found", NULL_PARG);
+ return (NULL_POSITION);
+ }
+
+ /*
+ * If we're using line numbers, we might as well
+ * remember the information we have now (the position
+ * and line number of the current line).
+ */
+ if (linenums)
+ add_lnum(linenum, pos);
+
+ /*
+ * Test the line to see if we have a match.
+ * Use strncmp because the pattern may be
+ * truncated (in the tags file) if it is too long.
+ * If tagendline is set, make sure we match all
+ * the way to end of line (no extra chars after the match).
+ */
+ len = (int) strlen(curtag->tag_pattern);
+ if (strncmp(curtag->tag_pattern, line, len) == 0 &&
+ (!curtag->tag_endline || line[len] == '\0' || line[len] == '\r'))
+ {
+ curtag->tag_linenum = find_linenum(linepos);
+ break;
+ }
+ }
+
+ return (linepos);
+}
+
+/*******************************************************************************
+ * gtags
+ */
+
+/*
+ * Find tags in the GLOBAL's tag file.
+ * The findgtag() will try and load information about the requested tag.
+ * It does this by calling "global -x tag" and storing the parsed output
+ * for future use by gtagsearch().
+ * Sets curtag to the first tag entry.
+ */
+ static enum tag_result
+findgtag(tag, type)
+ char *tag; /* tag to load */
+ int type; /* tags type */
+{
+ char buf[256];
+ FILE *fp;
+ struct tag *tp;
+
+ if (type != T_CTAGS_X && tag == NULL)
+ return TAG_NOFILE;
+
+ cleantags();
+ total = 0;
+
+ /*
+ * If type == T_CTAGS_X then read ctags's -x format from stdin
+ * else execute global(1) and read from it.
+ */
+ if (type == T_CTAGS_X)
+ {
+ fp = stdin;
+ /* Set tag default because we cannot read stdin again. */
+ tags = ztags;
+ } else
+ {
+#if !HAVE_POPEN
+ return TAG_NOFILE;
+#else
+ char *command;
+ char *flag;
+ char *qtag;
+ char *cmd = lgetenv("LESSGLOBALTAGS");
+
+ if (cmd == NULL || *cmd == '\0')
+ return TAG_NOFILE;
+ /* Get suitable flag value for global(1). */
+ switch (type)
+ {
+ case T_GTAGS:
+ flag = "" ;
+ break;
+ case T_GRTAGS:
+ flag = "r";
+ break;
+ case T_GSYMS:
+ flag = "s";
+ break;
+ case T_GPATH:
+ flag = "P";
+ break;
+ default:
+ return TAG_NOTYPE;
+ }
+
+ /* Get our data from global(1). */
+ qtag = shell_quote(tag);
+ if (qtag == NULL)
+ qtag = tag;
+ command = (char *) ecalloc(strlen(cmd) + strlen(flag) +
+ strlen(qtag) + 5, sizeof(char));
+ sprintf(command, "%s -x%s %s", cmd, flag, qtag);
+ if (qtag != tag)
+ free(qtag);
+ fp = popen(command, "r");
+ free(command);
+#endif
+ }
+ if (fp != NULL)
+ {
+ while (fgets(buf, sizeof(buf), fp))
+ {
+ char *name, *file, *line;
+ int len;
+
+ if (sigs)
+ {
+#if HAVE_POPEN
+ if (fp != stdin)
+ pclose(fp);
+#endif
+ return TAG_INTR;
+ }
+ len = (int) strlen(buf);
+ if (len > 0 && buf[len-1] == '\n')
+ buf[len-1] = '\0';
+ else
+ {
+ int c;
+ do {
+ c = fgetc(fp);
+ } while (c != '\n' && c != EOF);
+ }
+
+ if (getentry(buf, &name, &file, &line))
+ {
+ /*
+ * Couldn't parse this line for some reason.
+ * We'll just pretend it never happened.
+ */
+ break;
+ }
+
+ /* Make new entry and add to list. */
+ tp = maketagent(name, file, (LINENUM) atoi(line), NULL, 0);
+ TAG_INS(tp);
+ total++;
+ }
+ if (fp != stdin)
+ {
+ if (pclose(fp))
+ {
+ curtag = NULL;
+ total = curseq = 0;
+ return TAG_NOFILE;
+ }
+ }
+ }
+
+ /* Check to see if we found anything. */
+ tp = taglist.tl_first;
+ if (tp == TAG_END)
+ return TAG_NOTAG;
+ curtag = tp;
+ curseq = 1;
+ return TAG_FOUND;
+}
+
+static int circular = 0; /* 1: circular tag structure */
+
+/*
+ * Return the filename required for the next gtag in the queue that was setup
+ * by findgtag(). The next call to gtagsearch() will try to position at the
+ * appropriate tag.
+ */
+ static char *
+nextgtag()
+{
+ struct tag *tp;
+
+ if (curtag == NULL)
+ /* No tag loaded */
+ return NULL;
+
+ tp = curtag->next;
+ if (tp == TAG_END)
+ {
+ if (!circular)
+ return NULL;
+ /* Wrapped around to the head of the queue */
+ curtag = taglist.tl_first;
+ curseq = 1;
+ } else
+ {
+ curtag = tp;
+ curseq++;
+ }
+ return (curtag->tag_file);
+}
+
+/*
+ * Return the filename required for the previous gtag in the queue that was
+ * setup by findgtat(). The next call to gtagsearch() will try to position
+ * at the appropriate tag.
+ */
+ static char *
+prevgtag()
+{
+ struct tag *tp;
+
+ if (curtag == NULL)
+ /* No tag loaded */
+ return NULL;
+
+ tp = curtag->prev;
+ if (tp == TAG_END)
+ {
+ if (!circular)
+ return NULL;
+ /* Wrapped around to the tail of the queue */
+ curtag = taglist.tl_last;
+ curseq = total;
+ } else
+ {
+ curtag = tp;
+ curseq--;
+ }
+ return (curtag->tag_file);
+}
+
+/*
+ * Position the current file at at what is hopefully the tag that was chosen
+ * using either findtag() or one of nextgtag() and prevgtag(). Returns -1
+ * if it was unable to position at the tag, 0 if successful.
+ */
+ static POSITION
+gtagsearch()
+{
+ if (curtag == NULL)
+ return (NULL_POSITION); /* No gtags loaded! */
+ return (find_pos(curtag->tag_linenum));
+}
+
+/*
+ * The getentry() parses both standard and extended ctags -x format.
+ *
+ * [standard format]
+ * <tag> <lineno> <file> <image>
+ * +------------------------------------------------
+ * |main 30 main.c main(argc, argv)
+ * |func 21 subr.c func(arg)
+ *
+ * The following commands write this format.
+ * o Traditinal Ctags with -x option
+ * o Global with -x option
+ * See <http://www.gnu.org/software/global/global.html>
+ *
+ * [extended format]
+ * <tag> <type> <lineno> <file> <image>
+ * +----------------------------------------------------------
+ * |main function 30 main.c main(argc, argv)
+ * |func function 21 subr.c func(arg)
+ *
+ * The following commands write this format.
+ * o Exuberant Ctags with -x option
+ * See <http://ctags.sourceforge.net>
+ *
+ * Returns 0 on success, -1 on error.
+ * The tag, file, and line will each be NUL-terminated pointers
+ * into buf.
+ */
+ static int
+getentry(buf, tag, file, line)
+ char *buf; /* standard or extended ctags -x format data */
+ char **tag; /* name of the tag we actually found */
+ char **file; /* file in which to find this tag */
+ char **line; /* line number of file where this tag is found */
+{
+ char *p = buf;
+
+ for (*tag = p; *p && !IS_SPACE(*p); p++) /* tag name */
+ ;
+ if (*p == 0)
+ return (-1);
+ *p++ = 0;
+ for ( ; *p && IS_SPACE(*p); p++) /* (skip blanks) */
+ ;
+ if (*p == 0)
+ return (-1);
+ /*
+ * If the second part begin with other than digit,
+ * it is assumed tag type. Skip it.
+ */
+ if (!IS_DIGIT(*p))
+ {
+ for ( ; *p && !IS_SPACE(*p); p++) /* (skip tag type) */
+ ;
+ for (; *p && IS_SPACE(*p); p++) /* (skip blanks) */
+ ;
+ }
+ if (!IS_DIGIT(*p))
+ return (-1);
+ *line = p; /* line number */
+ for (*line = p; *p && !IS_SPACE(*p); p++)
+ ;
+ if (*p == 0)
+ return (-1);
+ *p++ = 0;
+ for ( ; *p && IS_SPACE(*p); p++) /* (skip blanks) */
+ ;
+ if (*p == 0)
+ return (-1);
+ *file = p; /* file name */
+ for (*file = p; *p && !IS_SPACE(*p); p++)
+ ;
+ if (*p == 0)
+ return (-1);
+ *p = 0;
+
+ /* value check */
+ if (strlen(*tag) && strlen(*line) && strlen(*file) && atoi(*line) > 0)
+ return (0);
+ return (-1);
+}
+
+#endif
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+ * Routines dealing with getting input from the keyboard (i.e. from the user).
+ */
+
+#include "less.h"
+#if OS2
+#include "cmd.h"
+#include "pckeys.h"
+#endif
+#if MSDOS_COMPILER==WIN32C
+#include "windows.h"
+extern char WIN32getch();
+static DWORD console_mode;
+#endif
+
+public int tty;
+extern int sigs;
+extern int utf_mode;
+
+/*
+ * Open keyboard for input.
+ */
+ public void
+open_getchr()
+{
+#if MSDOS_COMPILER==WIN32C
+ /* Need this to let child processes inherit our console handle */
+ SECURITY_ATTRIBUTES sa;
+ memset(&sa, 0, sizeof(SECURITY_ATTRIBUTES));
+ sa.nLength = sizeof(SECURITY_ATTRIBUTES);
+ sa.bInheritHandle = TRUE;
+ tty = (int) CreateFile("CONIN$", GENERIC_READ,
+ FILE_SHARE_READ, &sa,
+ OPEN_EXISTING, 0L, NULL);
+ GetConsoleMode((HANDLE)tty, &console_mode);
+ /* Make sure we get Ctrl+C events. */
+ SetConsoleMode((HANDLE)tty, ENABLE_PROCESSED_INPUT);
+#else
+#if MSDOS_COMPILER
+ extern int fd0;
+ /*
+ * Open a new handle to CON: in binary mode
+ * for unbuffered keyboard read.
+ */
+ fd0 = dup(0);
+ close(0);
+ tty = open("CON", OPEN_READ);
+#if MSDOS_COMPILER==DJGPPC
+ /*
+ * Setting stdin to binary causes Ctrl-C to not
+ * raise SIGINT. We must undo that side-effect.
+ */
+ (void) __djgpp_set_ctrl_c(1);
+#endif
+#else
+ /*
+ * Try /dev/tty.
+ * If that doesn't work, use file descriptor 2,
+ * which in Unix is usually attached to the screen,
+ * but also usually lets you read from the keyboard.
+ */
+#if OS2
+ /* The __open() system call translates "/dev/tty" to "con". */
+ tty = __open("/dev/tty", OPEN_READ);
+#else
+ tty = open("/dev/tty", OPEN_READ);
+#endif
+ if (tty < 0)
+ tty = 2;
+#endif
+#endif
+}
+
+/*
+ * Close the keyboard.
+ */
+ public void
+close_getchr()
+{
+#if MSDOS_COMPILER==WIN32C
+ SetConsoleMode((HANDLE)tty, console_mode);
+ CloseHandle((HANDLE)tty);
+#endif
+}
+
+/*
+ * Get a character from the keyboard.
+ */
+ public int
+getchr()
+{
+ char c;
+ int result;
+
+ do
+ {
+#if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC
+ /*
+ * In raw read, we don't see ^C so look here for it.
+ */
+ flush();
+#if MSDOS_COMPILER==WIN32C
+ if (ABORT_SIGS())
+ return (READ_INTR);
+ c = WIN32getch(tty);
+#else
+ c = getch();
+#endif
+ result = 1;
+ if (c == '\003')
+ return (READ_INTR);
+#else
+ result = iread(tty, &c, sizeof(char));
+ if (result == READ_INTR)
+ return (READ_INTR);
+ if (result < 0)
+ {
+ /*
+ * Don't call error() here,
+ * because error calls getchr!
+ */
+ quit(QUIT_ERROR);
+ }
+#endif
+#if 0 /* allow entering arbitrary hex chars for testing */
+ /* ctrl-A followed by two hex chars makes a byte */
+ {
+ int hex_in = 0;
+ int hex_value = 0;
+ if (c == CONTROL('A'))
+ {
+ hex_in = 2;
+ result = 0;
+ continue;
+ }
+ if (hex_in > 0)
+ {
+ int v;
+ if (c >= '0' && c <= '9')
+ v = c - '0';
+ else if (c >= 'a' && c <= 'f')
+ v = c - 'a' + 10;
+ else if (c >= 'A' && c <= 'F')
+ v = c - 'A' + 10;
+ else
+ hex_in = 0;
+ hex_value = (hex_value << 4) | v;
+ if (--hex_in > 0)
+ {
+ result = 0;
+ continue;
+ }
+ c = hex_value;
+ }
+ }
+#endif
+ /*
+ * Various parts of the program cannot handle
+ * an input character of '\0'.
+ * If a '\0' was actually typed, convert it to '\340' here.
+ */
+ if (c == '\0')
+ c = '\340';
+ } while (result != 1);
+
+ return (c & 0xFF);
+}
--- /dev/null
+/* Generated by "./mkutable -f2 Cc Cf Cs Co Zl Zp -- unicode/UnicodeData.txt" on Mon Jul 14 16:21:22 PDT 2014 */
+ { 0x0000, 0x001f }, /* Cc */
+ { 0x007f, 0x009f }, /* Cc */
+ { 0x00ad, 0x00ad }, /* Cf */
+ { 0x0600, 0x0605 }, /* Cf */
+ { 0x061c, 0x061c }, /* Cf */
+ { 0x06dd, 0x06dd }, /* Cf */
+ { 0x070f, 0x070f }, /* Cf */
+ { 0x180e, 0x180e }, /* Cf */
+ { 0x200b, 0x200f }, /* Cf */
+ { 0x2028, 0x2028 }, /* Zl */
+ { 0x2029, 0x2029 }, /* Zp */
+ { 0x202a, 0x202e }, /* Cf */
+ { 0x2060, 0x2064 }, /* Cf */
+ { 0x2066, 0x206f }, /* Cf */
+ { 0xd800, 0xd800 }, /* Cs */
+ { 0xdb7f, 0xdb80 }, /* Cs */
+ { 0xdbff, 0xdc00 }, /* Cs */
+ { 0xdfff, 0xdfff }, /* Cs */
+ { 0xe000, 0xe000 }, /* Co */
+ { 0xf8ff, 0xf8ff }, /* Co */
+ { 0xfeff, 0xfeff }, /* Cf */
+ { 0xfff9, 0xfffb }, /* Cf */
+ { 0x110bd, 0x110bd }, /* Cf */
+ { 0x1bca0, 0x1bca3 }, /* Cf */
+ { 0x1d173, 0x1d17a }, /* Cf */
+ { 0xe0001, 0xe0001 }, /* Cf */
+ { 0xe0020, 0xe007f }, /* Cf */
+ { 0xf0000, 0xf0000 }, /* Co */
+ { 0xffffd, 0xffffd }, /* Co */
+ { 0x100000, 0x100000 }, /* Co */
+ { 0x10fffd, 0x10fffd }, /* Co */
--- /dev/null
+/*
+ * Copyright (C) 1984-2015 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+/*
+----------------------- CHANGE HISTORY --------------------------
+
+ 1/29/84 Allowed use on standard input
+ 2/1/84 Added E, N, P commands
+ 4/17/84 Added '=' command, 'stop' signal handling
+ 4/20/84 Added line folding
+v2 4/27/84 Fixed '=' command to use BOTTOM_PLUS_ONE,
+ instead of TOP, added 'p' & 'v' commands
+v3 5/3/84 Added -m and -t options, '-' command
+v4 5/3/84 Added LESS environment variable
+v5 5/3/84 New comments, fixed '-' command slightly
+v6 5/15/84 Added -Q, visual bell
+v7 5/24/84 Fixed jump_back(n) bug: n should count real
+ lines, not folded lines. Also allow number on G command.
+v8 5/30/84 Re-do -q and -Q commands
+v9 9/25/84 Added "+<cmd>" argument
+v10 10/10/84 Fixed bug in -b<n> argument processing
+v11 10/18/84 Made error() ring bell if \n not entered.
+-----------------------------------------------------------------
+v12 2/13/85 Reorganized signal handling and made portable to 4.2bsd.
+v13 2/16/85 Reword error message for '-' command.
+v14 2/22/85 Added -bf and -bp variants of -b.
+v15 2/25/85 Miscellaneous changes.
+v16 3/13/85 Added -u flag for backspace processing.
+v17 4/13/85 Added j and k commands, changed -t default.
+v18 4/20/85 Rewrote signal handling code.
+v19 5/2/85 Got rid of "verbose" eq_message().
+ Made search() scroll in some cases.
+v20 5/21/85 Fixed screen.c ioctls for System V.
+v21 5/23/85 Fixed some first_cmd bugs.
+v22 5/24/85 Added support for no RECOMP nor REGCMP.
+v23 5/25/85 Miscellanous changes and prettying up.
+ Posted to USENET.
+-----------------------------------------------------------------
+v24 6/3/85 Added ti,te terminal init & de-init.
+ (Thanks to Mike Kersenbrock)
+v25 6/8/85 Added -U flag, standout mode underlining.
+v26 6/9/85 Added -M flag.
+ Use underline termcap (us) if it exists.
+v27 6/15/85 Renamed some variables to make unique in
+ 6 chars. Minor fix to -m.
+v28 6/28/85 Fixed right margin bug.
+v29 6/28/85 Incorporated M.Rose's changes to signal.c
+v30 6/29/85 Fixed stupid bug in argument processing.
+v31 7/15/85 Added -p flag, changed repaint algorithm.
+ Added kludge for magic cookie terminals.
+v32 7/16/85 Added cat_file if output not a tty.
+v33 7/23/85 Added -e flag and EDITOR.
+v34 7/26/85 Added -s flag.
+v35 7/27/85 Rewrote option handling; added option.c.
+v36 7/29/85 Fixed -e flag to work if not last file.
+v37 8/10/85 Added -x flag.
+v38 8/19/85 Changed prompting; created prompt.c.
+v39 8/24/85 (Not -p) does not initially clear screen.
+v40 8/26/85 Added "skipping" indicator in forw().
+ Posted to USENET.
+-----------------------------------------------------------------
+v41 9/17/85 ONLY_RETURN, control char commands,
+ faster search, other minor fixes.
+v42 9/25/85 Added ++ command line syntax;
+ ch_fsize for pipes.
+v43 10/15/85 Added -h flag, changed prim.c algorithms.
+v44 10/16/85 Made END print in all cases of eof;
+ ignore SIGTTOU after receiv ing SIGTSTP.
+v45 10/16/85 Never print backspaces unless -u.
+v46 10/24/85 Backwards scroll in jump_loc.
+v47 10/30/85 Fixed bug in edit(): *first_cmd==0
+v48 11/16/85 Use TIOCSETN instead of TIOCSETP.
+ Added marks (m and ' commands).
+ Posted to USENET.
+-----------------------------------------------------------------
+v49 1/9/86 Fixed bug: signal didn't clear mcc.
+v50 1/15/86 Added ' (quote) to gomark.
+v51 1/16/86 Added + cmd, fixed problem if first_cmd
+ fails, made g cmd sort of "work" on pipes
+ ev en if bof is no longer buffered.
+v52 1/17/86 Made short files work better.
+v53 1/20/86 Added -P option.
+v54 1/20/86 Changed help to use HELPFILE.
+v55 1/23/86 Messages work better if not tty output.
+v56 1/24/86 Added -l option.
+v57 1/31/86 Fixed -l to get confirmation before
+ ov erwriting an existing file.
+v58 8/28/86 Added filename globbing.
+v59 9/15/86 Fixed some bugs with very long filenames.
+v60 9/26/86 Incorporated changes from Leith (Casey)
+ Leedom for boldface and -z option.
+v61 9/26/86 Got rid of annoying repaints after ! cmd.
+ Posted to USENET.
+-----------------------------------------------------------------
+v62 12/23/86 Added is_directory(); change -z default to
+ -1 instead of 24; cat-and-exit if -e and
+ file is less than a screenful.
+v63 1/8/87 Fixed bug in cat-and-exit if > 1 file.
+v64 1/12/87 Changed puts/putstr, putc/putchr,
+ getc/getchr to av oid name conflict with
+ stdio functions.
+v65 1/26/87 Allowed '-' command to change NUMBER
+ v alued options (thanks to Gary Puckering)
+v66 2/13/87 Fixed bug: prepaint should use force=1.
+v67 2/24/87 Added !! and % expansion to ! command.
+v68 2/25/87 Added SIGWINCH and TIOCGWINSZ support;
+ changed is_directory to bad_file.
+ (thanks to J. Robert Ward)
+v69 2/25/87 Added SIGWIND and WIOCGETD (for Unix PC).
+v70 3/13/87 Changed help cmd from 'h' to 'H'; better
+ error msgs in bad_file, errno_message.
+v71 5/11/87 Changed -p to -c, made triple -c/-C
+ for clear-eol like more's -c.
+v72 6/26/87 Added -E, -L, use $SHELL in lsystem().
+ (thanks to Stev e Spearman)
+v73 6/26/87 Allow Examine "#" for previous file.
+ Posted to USENET 8/25/87.
+-----------------------------------------------------------------
+v74 9/18/87 Fix conflict in EOF symbol with stdio.h,
+ Make os.c more portable to BSD.
+v75 9/23/87 Fix problems in get_term (thanks to
+ Paul Eggert); new backwards scrolling in
+ jump_loc (thanks to Marion Hakanson).
+v76 9/23/87 Added -i flag; allow single "!" to
+ inv oke a shell (thanks to Franco Barber).
+v77 9/24/87 Added -n flag and line number support.
+v78 9/25/87 Fixed problem with prompts longer than
+ the screen width.
+v79 9/29/87 Added the _ command.
+v80 10/6/87 Allow signal to break out of linenum scan.
+v81 10/6/87 Allow -b to be changed from within less.
+v82 10/7/87 Add cmd_decode to use a table for key
+ binding (thanks to Dav id Nason).
+v83 10/9/87 Allow .less file for user-defined keys.
+v84 10/11/87 Fix -e/-E problems (thanks to Felix Lee).
+v85 10/15/87 Search now keeps track of line numbers.
+v86 10/20/87 Added -B option and autobuf; fixed
+ "pipe error" bug.
+v87 3/1/88 Fix bug re BSD signals while reading file.
+v88 3/12/88 Use new format for -P option (thanks to
+ der Mouse), allow "+-c" without message,
+ fix bug re BSD hangup.
+v89 3/18/88 Turn off line numbers if linenum scan
+ is interrupted.
+v90 3/30/88 Allow -P from within less.
+v91 3/30/88 Added tags file support (new -t option)
+ (thanks to Brian Campbell).
+v92 4/4/88 Added -+option syntax.
+v93 4/11/88 Add support for slow input (thanks to
+ Joe Orost & apologies for taking almost
+ 3 years to get this in!)
+v94 4/11/88 Redo reading/signal stuff.
+v95 4/20/88 Repaint screen better after signal.
+v96 4/21/88 Add /! and ?! commands.
+v97 5/17/88 Allow -l/-L from within less.
+ Eliminate some static arrays (use calloc).
+ Posted to USENET.
+-----------------------------------------------------------------
+v98 10/14/88 Fix incorrect calloc call; uninitialized
+ var in exec_mca; core dump on unknown TERM.
+ Make v cmd work if past last line of file.
+ Fix some signal bugs.
+v99 10/29/88 Allow space between -X and string,
+ when X is a string-valued option.
+v100 1/5/89 Fix globbing bug when $SHELL not set;
+ allow spaces after -t command.
+v101 1/6/89 Fix problem with long (truncated) lines
+ in tags file (thanks to Neil Dixon).
+v102 1/6/89 Fix bug with E# when no prev file;
+ allow spaces after -l command.
+v103 3/14/89 Add -N, -f and -? options. Add z and w
+ commands. Add %L for prompt strings.
+v104 3/16/89 Added EDITPROTO.
+v105 3/20/89 Fix bug in find_linenum which cached
+ incorrectly on long lines.
+v106 3/31/89 Added -k option and multiple lesskey
+ files.
+v107 4/27/89 Add 8-bit char support and -g option.
+ Split option code into 3 files.
+v108 5/5/89 Allocate position table dynamically
+ (thanks to Paul Eggert); change % command
+ from "percent" to vi-style brace finder.
+v109 5/10/89 Added ESC-% command, split prim.c.
+v110 5/24/89 Fixed bug in + option; fixed repaint bug
+ under Sun windows (thanks to Paul Eggert).
+v111 5/25/89 Generalized # and % expansion; use
+ calloc for some error messages.
+v112 5/30/89 Get rid of ESC-%, add {}()[] commands.
+v113 5/31/89 Optimize lseeks (thanks to Paul Eggert).
+v114 7/25/89 Added ESC-/ and ESC-/! commands.
+v115 7/26/89 Added ESC-n command.
+v116 7/31/89 Added find_pos to optimize g command.
+v117 8/1/89 Change -f option to -r.
+v118 8/2/89 Save positions for all previous files,
+ not just the immediately previous one.
+v119 8/7/89 Save marks across file boundaries.
+ Add file handle stuff.
+v120 8/11/89 Add :ta command.
+v121 8/16/89 Add -f option.
+v122 8/30/89 Fix performance with many buffers.
+v123 8/31/89 Verbose prompts for string options.
+ Posted beta to USENET.
+-----------------------------------------------------------------
+v124 9/18/89 Reorganize search commands,
+ N = rev, ESC-n = span, add ESC-N.
+v125 9/18/89 Fix tab bug (thanks to Alex Liu).
+ Fix EOF bug when both -w and -c.
+v126 10/25/89 Add -j option.
+v127 10/27/89 Fix problems with blank lines before BOF.
+v128 10/27/89 Add %bj, etc. to prompt strings.
+v129 11/3/89 Add -+,-- commands; add set-option and
+ unset-option to lesskey.
+v130 11/6/89 Generalize A_EXTRA to string, remove
+ set-option, unset-option from lesskey.
+v131 11/7/89 Changed name of EDITPROTO to LESSEDIT.
+v132 11/8/89 Allow editing of command prefix.
+v133 11/16/89 Add -y option (thanks to Jeff Sullivan).
+v134 12/1/89 Glob filenames in the -l command.
+v135 12/5/89 Combined {}()[] commands into one, and
+ added ESC-^F and ESC-^B commands.
+v136 1/20/90 Added -S, -R flags. Added | command.
+ Added warning for binary files. (thanks
+ to Richard Brittain and J. Sullivan).
+v137 1/21/90 Rewrote horrible pappend code.
+ Added * notation for hi-bit chars.
+v138 1/24/90 Fix magic cookie terminal handling.
+ Get rid of "cleanup" loop in ch_get.
+v139 1/27/90 Added MSDOS support. (many thanks
+ to Richard Brittain).
+v140 2/7/90 Editing a new file adds it to the
+ command line list.
+v141 2/8/90 Add edit_list for editing >1 file.
+v142 2/10/90 Add :x command.
+v143 2/11/90 Add * and @ modifies to search cmds.
+ Change ESC-/ cmd from /@* to / *.
+v144 3/1/90 Messed around with ch_zero;
+ no real change.
+v145 3/2/90 Added -R and -v/-V for MSDOS;
+ renamed FILENAME to avoid conflict.
+v146 3/5/90 Pull cmdbuf functions out of command.c
+v147 3/7/90 Implement ?@; fix multi-file edit bugs.
+v148 3/29/90 Fixed bug in :e<file> then :e#.
+v149 4/3/90 Change error,ierror,query to use PARG.
+v150 4/6/90 Add LESS_CHARSET, LESS_CHARDEF.
+v151 4/13/90 Remove -g option; clean up ispipe.
+v152 4/14/90 lsystem() closes input file, for
+ editors which require exclusive open.
+v153 4/18/90 Fix bug if SHELL unset;
+ fix bug in overstrike control char.
+v154 4/25/90 Output to fd 2 via buffer.
+v155 4/30/90 Ignore -i if uppercase in pattern
+ (thanks to Michael Rendell.)
+v156 5/3/90 Remove scroll limits in forw() & back();
+ causes problems with -c.
+v157 5/4/90 Forward search starts at next real line
+ (not screen line) after jump target.
+v158 6/14/90 Added F command.
+v159 7/29/90 Fix bug in exiting: output not flushed.
+v160 7/29/90 Clear screen before initial output w/ -c.
+v161 7/29/90 Add -T flag.
+v162 8/14/90 Fix bug with +F on command line.
+v163 8/21/90 Added LESSBINFMT variable.
+v164 9/5/90 Added -p, LINES, COLUMNS and
+ unset mark ' == BOF, for 1003.2 D5.
+v165 9/6/90 At EOF with -c set, don't display empty
+ screen when try to page forward.
+v166 9/6/90 Fix G when final line in file wraps.
+v167 9/11/90 Translate CR/LF -> LF for 1003.2.
+v168 9/13/90 Return to curr file if "tag not found".
+v169 12/12/90 G goes to EOF even if file has grown.
+v170 1/17/91 Add optimization for BSD _setjmp;
+ fix #include ioctl.h TERMIO problem.
+ (thanks to Paul Eggert)
+ Posted to USENET.
+-----------------------------------------------------------------
+v171 3/6/91 Fix -? bug in get_filename.
+v172 3/15/91 Fix G bug in empty file.
+ Fix bug with ?\n and -i and uppercase
+ pattern at EOF!
+ (thanks to Paul Eggert)
+v173 3/17/91 Change N cmd to not permanently change
+ direction. (thanks to Brian Matthews)
+v174 3/18/91 Fix bug with namelogfile not getting
+ cleared when change files.
+v175 3/18/91 Fix bug with ++cmd on command line.
+ (thanks to Jim Meyering)
+v176 4/2/91 Change | to not force current screen,
+ include marked line, start/end from
+ top of screen. Improve search speed.
+ (thanks to Don Mears)
+v177 4/2/91 Add LESSHELP variable.
+ Fix bug with F command with -e.
+ Try /dev/tty for input before using fd 2.
+ Patches posted to USENET 4/2/91.
+-----------------------------------------------------------------
+v178 4/8/91 Fixed bug in globbing logfile name.
+ (thanks to Jim Meyering)
+v179 4/9/91 Allow negative -z for screen-relative.
+v180 4/9/91 Clear to eos rather than eol if "db";
+ don't use "sr" if "da".
+ (thanks to Tor Lillqvist)
+v181 4/18/91 Fixed bug with "negative" chars 80 - FF.
+ (thanks to Benny Sander Hofmann)
+v182 5/16/91 Fixed bug with attribute at EOL.
+ (thanks to Brian Matthews)
+v183 6/1/91 Rewrite linstall to do smart config.
+v184 7/11/91 Process \b in searches based on -u
+ rather than -i.
+v185 7/11/91 -Pxxx sets short prompt; assume SIGWINCH
+ after a SIGSTOP. (thanks to Ken Laprade)
+-----------------------------------------------------------------
+v186 4/20/92 Port to MS-DOS (Microsoft C).
+v187 4/23/92 Added -D option & TAB_COMPLETE_FILENAME.
+v188 4/28/92 Added command line editing features.
+v189 12/8/92 Fix mem overrun in anscreen.c:init;
+ fix edit_list to recover from bin file.
+v190 2/13/93 Make TAB enter one filename at a time;
+ create ^L with old TAB functionality.
+v191 3/10/93 Defer creating "flash" page for MS-DOS.
+v192 9/6/93 Add BACK-TAB.
+v193 9/17/93 Simplify binary_file handling.
+v194 1/4/94 Add rudiments of alt_filename handling.
+v195 1/11/94 Port back to Unix; support keypad.
+-----------------------------------------------------------------
+v196 6/7/94 Fix bug with bad filename; fix IFILE
+ type problem. (thanks to David MacKenzie)
+v197 6/7/94 Fix bug with .less tables inserted wrong.
+v198 6/23/94 Use autoconf installation technology.
+ (thanks to David MacKenzie)
+v199 6/29/94 Fix MS-DOS build (thanks to Tim Wiegman).
+v200 7/25/94 Clean up copyright, minor fixes.
+ Posted to prep.ai.mit.edu
+-----------------------------------------------------------------
+v201 7/27/94 Check for no memcpy; add casts to calloc;
+ look for regcmp in libgen.a.
+ (thanks to Kaveh Ghazi).
+v202 7/28/94 Fix bug in edit_next/edit_prev with
+ non-existent files.
+v203 8/2/94 Fix a variety of configuration bugs on
+ various systems. (thanks to Sakai
+ Kiyotaka, Harald Koenig, Bjorn Brox,
+ Teemu Rantanen, and Thorsten Lockert)
+v204 8/3/94 Use strerror if available.
+ (thanks to J.T. Conklin)
+v205 8/5/94 Fix bug in finding "me" termcap entry.
+ (thanks to Andreas Stolcke)
+8/10/94 v205+: Change BUFSIZ to LBUFSIZE to avoid name
+ conflict with stdio.h.
+ Posted to prep.ai.mit.edu
+-----------------------------------------------------------------
+v206 8/10/94 Use initial_scrpos for -t to avoid
+ displaying first page before init().
+ (thanks to Dominique Petitpierre)
+v207 8/12/94 Fix bug if stdout is not tty.
+v208 8/16/94 Fix bug in close_altfile if goto err1
+ in edit_ifile. (Thanks to M.J. Hewitt)
+v209 8/16/94 Change scroll to wscroll to avoid
+ conflict with library function.
+v210 8/16/94 Fix bug with bold on 8 bit chars.
+ (thanks to Vitor Duarte)
+v211 8/16/94 Don't quit on EOI in jump_loc / forw.
+v212 8/18/94 Use time_t if available.
+v213 8/20/94 Allow ospeed to be defined in termcap.h.
+v214 8/20/94 Added HILITE_SEARCH, -F, ESC-u cmd.
+ (thanks to Paul Lew and Bob Byrnes)
+v215 8/23/94 Fix -i toggle behavior.
+v216 8/23/94 Process BS in all searches, not only -u.
+v217 8/24/94 Added -X flag.
+v218 8/24/94 Reimplement undo_search.
+v219 8/24/94 Find tags marked with line number
+ instead of pattern.
+v220 8/24/94 Stay at same position after SIG_WINCH.
+v221 8/24/94 Fix bug in file percentage in big file.
+v222 8/25/94 Do better if can't reopen current file.
+v223 8/27/94 Support setlocale.
+ (thanks to Robert Joop)
+v224 8/29/94 Revert v216: process BS in search
+ only if -u.
+v225 9/6/94 Rewrite undo_search again: toggle.
+v226 9/15/94 Configuration fixes.
+ (thanks to David MacKenzie)
+v227 9/19/94 Fixed strerror config problem.
+ Posted to prep.ai.mit.edu
+-----------------------------------------------------------------
+v228 9/21/94 Fix bug in signals: repeated calls to
+ get_editkeys overflowed st_edittable.
+v229 9/21/94 Fix "Nothing to search" error if -a
+ and SRCH_PAST_EOF.
+v230 9/21/94 Don't print extra error msg in search
+ after regerror().
+v231 9/22/94 Fix hilite bug if search matches 0 chars.
+ (thanks to John Polstra)
+v232 9/23/94 Deal with weird systems that have
+ termios.h but not tcgetattr().
+ Posted to prep.ai.mit.edu
+-----------------------------------------------------------------
+v233 9/26/94 Use get_term() instead of pos_init() in
+ psignals to re-get lower_left termcap.
+ (Thanks to John Malecki)
+v234 9/26/94 Make MIDDLE closer to middle of screen.
+v235 9/27/94 Use local strchr if system doesn't have.
+v236 9/28/94 Don't use libucb; use libterm if
+ libtermcap & libcurses doesn't work.
+ (Fix for Solaris; thanks to Frank Kaefer)
+v237 9/30/94 Use system isupper() etc if provided.
+ Posted to prep.ai.mit.edu
+-----------------------------------------------------------------
+v238 10/6/94 Make binary non-blinking if LESSBINFMT
+ is set to a string without a *.
+v239 10/7/94 Don't let delimit_word run back past
+ beginning of cmdbuf.
+v240 10/10/94 Don't write into termcap buffer.
+ (Thanks to Benoit Speckel)
+v241 10/13/94 New lesskey file format.
+ Don't expand filenames in search command.
+v242 10/14/94 Allow lesskey specification of "literal".
+v243 10/14/94 Add #stop command to lesskey.
+v244 10/16/94 Add -f flag to lesskey.
+v245 10/25/94 Allow TAB_COMPLETE_FILENAME to be undefd.
+v246 10/27/94 Move help file to /usr/local/share.
+v247 10/27/94 Add -V option.
+v248 11/5/94 Add -V option to lesskey.
+v249 11/5/94 Remove -f flag from lesskey; default
+ input file is ~/.lesskey.in, not stdin.
+v250 11/7/94 Lesskey input file "-" means stdin.
+v251 11/9/94 Convert cfgetospeed result to ospeed.
+ (Thanks to Andrew Chernov)
+v252 11/16/94 Change default lesskey input file from
+ .lesskey.in to .lesskey.
+ Posted to prep.ai.mit.edu
+-----------------------------------------------------------------
+v253 11/21/94 Fix bug when tags file has a backslash.
+v254 12/6/94 Fix -k option.
+v255 12/8/94 Add #define EXAMINE to disable :e etc.
+v256 12/10/94 Change highlighting: only highlite search
+ results (but now it is reliable).
+v257 12/10/94 Add goto_line and repaint_highlight
+ to optimize highlight repaints.
+v258 12/12/94 Fixup in hilite_line if BS_SPECIAL.
+v259 12/12/94 Convert to autoconf 2.0.
+v260 12/13/94 Add SECURE define.
+v261 12/14/94 Use system WERASE char as EC_W_BACKSPACE.
+v262 12/16/94 Add -g/-G flag and screen_hilite.
+v263 12/20/94 Reimplement/optimize -G flag behavior.
+v264 12/23/94 Allow EXTRA string after line-edit cmd
+ in lesskey file.
+v265 12/24/94 Add LESSOPEN=|cmd syntax.
+v266 12/26/94 Add -I flag.
+v267 12/28/94 Formalize the four-byte header emitted
+ by a LESSOPEN pipe.
+v268 12/28/94 Get rid of four-byte header.
+v269 1/2/95 Close alt file before open new one.
+ Avoids multiple popen().
+v270 1/3/95 Use VISUAL; use S_ISDIR/S_ISREG; fix
+ config problem with Solaris POSIX regcomp.
+v271 1/4/95 Don't quit on read error.
+v272 1/5/95 Get rid of -L.
+v273 1/6/95 Fix ch_ungetchar bug; don't call
+ LESSOPEN on a pipe.
+v274 1/6/95 Ported to OS/2 (thanks to Kai Uwe Rommel)
+v275 1/18/95 Fix bug if toggle -G at EOF.
+v276 1/30/95 Fix OS/2 version.
+v277 1/31/95 Add "next" charset; don't display ^X
+ for X > 128.
+v278 2/14/95 Change default for -G.
+ Posted to prep.ai.mit.edu
+-----------------------------------------------------------------
+v279 2/22/95 Add GNU options --help, --version.
+ Minor config fixes.
+v280 2/24/95 Clean up calls to glob(); don't set #
+ if we can't open the new file.
+v281 2/24/95 Repeat search should turn on hilites.
+v282 3/2/95 Minor fixes.
+v283 3/2/95 Fix homefile; make OS2 look in $HOME.
+v284 3/2/95 Error if "v" on LESSOPENed file;
+ "%" figures out file size on pipe.
+v285 3/7/95 Don't set # in lsystem;
+ lesskey try $HOME first.
+v286 3/7/95 Reformat change history (too much free time?).
+v287 3/8/95 Fix hilite bug if overstrike multiple chars.
+v288 3/8/95 Allow lesskey to override get_editkey keys.
+v289 3/9/95 Fix adj_hilite bug when line gets processed by
+ hilite_line more than once.
+v290 3/9/95 Make configure automatically. Fix Sequent problem
+ with incompatible sigsetmask().
+ Posted to prep.ai.mit.edu
+-----------------------------------------------------------------
+v291 3/21/95 Add #env to lesskey. Fix MS-DOS build.
+ Posted to simtel.
+-----------------------------------------------------------------
+v292 4/24/95 Add MS-DOS support for Borland C.
+ Fix arrow keys in MS-DOS versions.
+v293 4/28/95 Add auto-versioning stuff to make dist.
+v294 5/12/95 Fix Borland build.
+v295 1/20/96 Fix search on squished file; add /@@.
+v296 1/23/96 Allow cmdbuf larger than screen width.
+v297 1/24/96 Don't call termcap if tgetent fails;
+ add #defines for buffers.
+v298 1/24/96 Change @@ to ^K.
+ Add alternate search modifiers ^N, ^F, ^E.
+v299 1/25/96 Fix percent overflow in jump_percent (thanks to Brent Wiese);
+ don't send "ti" after shell command till RETURN pressed.
+v300 1/25/96 Change -U to print tabs as ^I.
+v301 1/30/96 Make hilites work in cmd F output.
+v302 1/31/96 Fix cmd F to notice window-change signals.
+v303 1/31/96 Add ESC-SPACE command.
+v304 2/1/96 Add ^R search modifier; add LESSSECURE.
+v305 2/2/96 Workaround Linux /proc kernel bug; add LESSKEY.
+v306 3/16/96 Minor fixes.
+v307 3/25/96 Allow cmd line arg "--"; fix DOS & OS/2 defines.h.
+v308 4/4/96 Port to OS-9 (thanks to Boisy Pitre); fix -d.
+v309 4/9/96 Fix OS-9 version; fix tags bug with "$".
+v310 4/10/96 Get rid of HELPFILE.
+v311 4/22/96 Add Windows32 support; merge doscreen.c into screen.c.
+v312 4/24/96 Don't quit after "cannot reopen" error.
+v313 4/25/96 Added horizontal scrolling.
+v314 4/26/96 Modified -e to quit on reaching end of a squished file.
+v315 4/26/96 Fix "!;TAB" bug.
+v316 5/2/96 Make "|a" when (a < curr screen) go to end of curr screen.
+v317 5/14/96 Various fixes for the MS-DOS and OS/2 builds.
+ Added ## and %% handling for filenames
+v318 5/29/96 Port to OS-9 Microware compiler; minor fixes
+ (thanks to Martin Gregorie).
+v319 7/8/96 Fix Windows port (thanks to Jeff Paquette).
+v320 7/11/96 Final fixes for Windows port.
+v321 7/18/96 Minor fixes.
+ Posted to Web page.
+-----------------------------------------------------------------
+v322 8/13/96 Fix bug in shell escape from help file; add support for
+ Microsoft Visual C under Windows; numerous small fixes.
+v323 8/19/96 Fixes for Windows version (thanks to Simon Munton);
+ fix for Linux library weirdness (thanks to Jim Diamond);
+ port to DJGPP (thanks to Eli Zaretskii).
+v324 8/21/96 Add support for spaces in filenames (thanks to Simon Munton).
+v325 8/21/96 Add lessecho, for spaces in filenames under Unix.
+v326 8/27/96 Fix DJGPP version.
+v327 9/1/96 Reorganize lglob, make spaces in filenames work better in Unix.
+v328 10/7/96 Append / to directory name in filename completion.
+ Fix MS-DOS and OS-9 versions.
+v329 10/11/96 Fix more MS-DOS bugs; add LESSSEPARATOR; add -" option.
+ Add LESSMETACHARS, LESSMETAESCAPE.
+v330 10/21/96 Minor fixes.
+ Posted to Web page.
+-----------------------------------------------------------------
+v331 4/22/97 Various Windows fixes (thanks to Gurusamy Sarathy).
+v332 4/22/97 Enter filenames from cmd line into edit history.
+ Posted to Web page.
+-----------------------------------------------------------------
+v333 3/4/99 Changed -w to highlite new line after forward movement.
+v334 3/9/99 Avoid overflowing prompt buffer; add %d and %D.
+v335 3/20/99 Add EBCDIC support (thanks to Thomas Dorner).
+ Use HOMEDRIVE/HOMEPATH on Windows (thanks to Preston Bannister).
+ Posted to Web page.
+-----------------------------------------------------------------
+v336 4/8/99 Fix installation bugs.
+v337 4/9/99 Fix another installation bug.
+ Posted to Web page.
+-----------------------------------------------------------------
+v338 4/13/99 Add support for long option names.
+v339 4/18/99 Add \k, long option names to lesskey. Add -^P. Add :d.
+v340 4/21/99 Add regexec2. Fix Windows build.
+ Posted to Web page.
+-----------------------------------------------------------------
+v341 5/6/99 Add -F option; %c & ?c prompt escapes.
+ (Thanks to Michele Maltoni)
+v342 7/22/99 Add system-wide lesskey file; allow GPL or Less License.
+v343 9/23/99 Support UTF-8 (Thanks to Robert Brady).
+ Add %P and ?P in prompts.
+v344 10/27/99 -w highlights target line of g and p commands.
+v345 10/29/99 Make -R pass thru ESC but not other control chars.
+ Posted to Web page.
+-----------------------------------------------------------------
+v346 11/4/99 Fix bugs in long option processing; R cmd should clear hilites.
+ Posted to Web page.
+-----------------------------------------------------------------
+v347 12/13/99 Fixes for DJGPP version (thanks to Eli Zaretskii).
+v348 12/28/99 Fix deleting file with marks (thanks to Dimitar Jekov).
+ Fix color problem in DJGPP version (thanks to Eli Zaretskii).
+v349 1/24/00 Fix minor DJGPP bugs; check environment vars for UTF-8;
+ add --with-editor (thanks to Eli, Markus Kuhn, Thomas Schoepf).
+v350 3/1/00 Fix clear-while-standout bug.
+v351 3/5/00 Change -M and = prompts to show top & bottom line number.
+ Posted to Web page.
+-----------------------------------------------------------------
+v352 3/8/00 Fix scan_option NULL dereference.
+-----------------------------------------------------------------
+v353 3/20/00 Fix SECURE compile bug, allow space after numeric option.
+v354 3/23/00 Add support for PCRE; add --with-regex configure option.
+-----------------------------------------------------------------
+v355 6/28/00 Add -# option (thanks to Andy Levinson).
+v356 7/5/00 Add -J option.
+v357 7/6/00 Support sigprocmask.
+-----------------------------------------------------------------
+v358 7/8/00 Fix problems with #stop in lesskey file.
+ Posted to Web page.
+-----------------------------------------------------------------
+v359 9/10/00 Fixes for Win32 display problems (thanks to Maurizio Vairani).
+v360 1/17/01 Move sysless to etc.
+v361 12/4/01 Add IBM-1047 charset & EBCDIC fixes (thanks to Thomas Dorner).
+ Fix 32 bit dependencies (thanks to Paul Eggert).
+ Fix UTF-8 overstriking (thanks to Robert Brady).
+v362 12/4/01 Make status column show search targets.
+v363 12/6/01 Add --no-keypad option.
+ Add variable width tabstops (thanks to Peter Samuelson).
+v364 12/10/01 Better handling of very long lines in input;
+ Fix horizontal shifting of colored text.
+v365 12/11/01 Fix overstriking of tabs;
+ Add support for global(1) and multiple tag matches
+ (thanks to Shigio Yamaguchi and Tim Vanderhoek).
+v366 12/11/01 Fixes for OS/2 (thanks to Kyosuke Tokoro).
+v367 12/13/01 Allow -D and -x options to terminate without dollar sign;
+ Right/left arrow when entering N are shift cmds, not line edit.
+v368 12/18/01 Update lesskey commands.
+v370 12/23/01 Fix tags error messages.
+ Posted to Web page.
+-----------------------------------------------------------------
+v371 12/26/01 Fix new_file bug; use popen in Windows version;
+ fix some compiler warnings.
+v372 12/29/01 Make -b be in units of 1K.
+v373 1/14/02 Improve handling of filenames containing shell metachars.
+v374 2/7/02 Fix memory leak; fix bug in -x argument parsing.
+v375 4/7/02 Fix searching for SGR sequences; fix SECURE build;
+ add SGR support to DJGPP version (thanks to Eli Zaretskii).
+v376 6/10/02 Fix bug in overstriking mulitbyte UTF-8 characters
+ (thanks to Jungshik Shin).
+ Posted to Web page.
+-----------------------------------------------------------------
+v377 9/10/02 Fix bug in Windows version when file contains CR;
+ fix bug in search highlights with -R;
+ make initial buffer limit really be 64K not unlimited.
+v378 9/30/02 Misc bug fixes and compiler warning cleanup.
+ Posted to Web page.
+-----------------------------------------------------------------
+v379 11/23/02 Add -L option; fix bug with ctrl-K in lesskey files;
+ improve UTF-8 overstriking and underscore overstriking;
+ fix minor man page problems; change to autoconf 2.54.
+v380 11/24/02 Make LINENUM same as POSITION.
+v381 11/28/02 Make -N use 7 columns for line number if possible.
+-----------------------------------------------------------------
+v382 2/3/04 Remove copyrighted code.
+-----------------------------------------------------------------
+v383 2/16/04 Add history file; add -K option; improve UTF-8 handling;
+ fix some signed char bugs (thanks to Christian Biere);
+ fix some upper/lower case bugs (thanks to Bjoern Jacke);
+ add erase2 char (thanks to David Lawrence);
+ add windows charset (thanks to Dimitar Zhekov).
+v384 2/20/04 Improvements in UTF-8 handling.
+v385 2/23/04 Fix UTF-8 output bug.
+-----------------------------------------------------------------
+v386 9/13/05 Improvements to UTF-8 shift & color (thanks to Charles Levert);
+ protect against invalid LESSOPEN and LESSCLOSE values.
+v387 9/14/05 Update Charles Levert's UTF-8 patch.
+v388 9/14/05 Change history behavior; change most sprintf calls to snprintf.
+v389 9/14/05 Fix copy & paste with long lines; improve performance of
+ expand_linebuf; fix crash in init_mlist;
+v390 9/15/05 Show search matches in status column even if -G is set.
+-----------------------------------------------------------------
+v391 9/17/05 Fix bugs.
+v392 10/14/05 Fix line wrapping bug.
+v393 10/19/05 Allow multiple attributes per char; fix bold+underline bug
+ (thanks again to Charles Levert).
+v394 11/8/05 Fix prompt bug; fix compile problem in Windows build.
+-----------------------------------------------------------------
+v395 1/12/07 Update Unicode tables (thanks to Charles Levert);
+ don't chmod if LESSHISTFILE = /dev/null;
+ make -f work for directories; support DESTDIR in Makefile;
+ fix sigset_t detection in configure;
+ make "t" cmd traverse tags in correct order
+v396 1/13/07 Add compatibility with POSIX more.
+v397 3/21/07 Allow decimal point in number for % command;
+ Allow decimal point in number for -j option;
+ Allow n command to fetch last search pattern from history
+ (thanks to arno).
+v398 3/22/07 Don't rewrite history file if not necessary;
+ fix bug when filenames contain "$".
+v399 3/22/07 Don't move to bottom of screen at startup;
+ don't output extraneous newlines.
+v400 3/23/07 Allow search to find pattern after null byte (PCRE and no-regex)
+ (thanks to Michael Constant).
+-----------------------------------------------------------------
+v401 3/24/07 Minor documentation fixes.
+v402 3/30/07 Fix autoconf bug when memcpy etc are inline;
+ fix bug in terminating number following -j option.
+v403 5/25/07 Fix Windows build.
+v404 6/5/07 Fix display bug with F command and long lines.
+v405 6/17/07 Fix display bug when using -w option.
+v406 6/17/07 Fix secure build.
+v407 8/16/07 Fix bugs; support CSI chars.
+v408 10/1/07 Fix bug in -i with non-ASCII chars.
+v409 10/12/07 Fix crash when viewing text with invalid UTF-8 sequences.
+v411 11/6/07 Fix case-insensitive searching with non-ASCII text.
+v412 11/6/07 Use symbolic SEEK constants.
+v413 11/6/07 Fix search highlight bug with non-ASCII text.
+v414 11/6/07 Fix display bug with no-wrap terminals.
+v415 11/14/07 Add --follow-name option.
+v416 11/22/07 Fix crash when searching text with invalid UTF-8 sequences.
+v417 12/31/07 Don't support single-char CSI in UTF-8 mode;
+ fix bug with -R and invalid CSI sequences;
+ fix bug searching text with SGR sequences with -r;
+ emulate SGR sequences in WIN32 build.
+v418 12/31/07 Clean up.
+-----------------------------------------------------------------
+v419 1/16/08 Make CSI char 0x9B work in UTF-8 mode (thanks to Colin Watson).
+v420 2/24/08 Add & command; fix -F option; fix '' after G.
+v421 2/24/08 Ignore filtered lines when searching.
+v422 3/2/08 Output CR at startup.
+v423 5/27/08 Clean up.
+v424 6/16/08 Fix compile bug with pcre; don't filter help file.
+v425 7/14/08 Fix non-ANSI code in list handling in ch.c.
+v426 10/27/08 Fix ignaw terminal handling (thanks to Per Hedeland);
+ fix binary file detection in UTF-8 mode.
+v427 3/16/09 A few Win32 fixes (thanks to Jason Hood).
+v428 3/30/09 Add "|-" syntax to LESSOPEN.
+v429 4/10/09 Fix search highlighting bug with underlined text.
+-----------------------------------------------------------------
+v430 4/22/09 Don't pass "-" to non-pipe LESSOPEN unless it starts with "-".
+v431 4/29/09 Fix highlight bug when match is at end of line.
+v432 6/27/09 Better fix for highlight bugs;
+ fix new problems with ignaw terminals.
+v433 6/28/09 Cleanup search code.
+v434 6/29/09 More cleanup.
+v435 7/04/09 Fix bugs with non-regex filtering.
+v436 7/05/09 Fix memory leak.
+-----------------------------------------------------------------
+v437 7/14/09 Fix bug in handling some long option names;
+ make percentage calculation more accurate.
+v438 12/29/10 Fix bugs with -i/-I and & filtering;
+ exit with status 2 on ctrl-C with -K.
+v439 12/31/10 Add -A option.
+v440 1/5/11 Fix bug displaying prompt after = command.
+v441 1/21/11 Fix semi-infinite loop if no newlines in file;
+ make new -A behavior the default.
+-----------------------------------------------------------------
+v442 3/2/11 Fix search bug.
+ Add ctrl-G line edit command.
+v443 4/9/11 Fix Windows build.
+v444 6/8/11 Fix ungetc bug; remove vestiges of obsolete -l option.
+-----------------------------------------------------------------
+v445 10/19/11 Fix hilite bug in backwards scroll with -J.
+ Fix hilite bug with backspaces.
+ Fix bugs handling SGR sequences in Win32 (thanks to Eric Lee).
+ Add support for GNU regex (thanks to Reuben Thomas).
+v446 5/15/12 Up/down arrows in cmd editing search for matching cmd.
+v447 5/21/12 Add ESC-F command, two-pipe LESSOPEN syntax.
+v448 6/15/12 Print name of regex library in version message.
+v449 6/23/12 Allow config option --with-regex=none.
+v450 7/4/12 Fix EOF bug with ESC-F.
+v451 7/20/12 Fix typo.
+-----------------------------------------------------------------
+v452 10/19/12 Fix --with-regex=none, fix "stty 0", fix Win32.
+ Don't quit if errors in cmd line options.
+v453 10/27/12 Increase buffer sizes.
+v454 11/5/12 Fix typo.
+v455 11/5/12 Fix typo.
+v456 11/8/12 Fix option string incompatibility.
+v457 12/8/12 Use new option string syntax only after --use-backslash.
+v458 4/4/13 Fix display bug in using up/down in cmd buffer.
+-----------------------------------------------------------------
+v459 5/6/13 Fix ++ bug.
+v460 6/19/13 Automate construction of Unicode tables.
+v461 6/21/13 Collapse multiple CRs before LF.
+v462 11/26/13 Don't overwrite history file, just append to it.
+v463 7/13/14 Misc. fixes.
+v464 7/19/14 Fix bugs & improve performance in & filtering
+ (thanks to John Sullivan).
+v465 8/9/14 More fixes from John Sullivan.
+v466 8/23/14 Add colon to LESSANSIMIDCHARS.
+v467 9/18/14 Misc. fixes.
+v468 9/18/14 Fix typo
+v469 10/2/14 Allow extra string in command to append to a multichar
+ cmd without executing it; fix bug using GNU regex.
+v470 10/5/14 Fix some compiler warnings.
+v471 12/14/14 Fix unget issues with prompt. Allow disabling history
+ when compiled value of LESSHISTFILE = "-".
+v473 12/19/14 Fix prompt bug with stdin and -^P in lesskey extra string.
+v474 1/30/15 Fix bug in backwards search with match on bottom line.
+ Make follow mode reopen file if file shrinks.
+v475 3/2/15 Fix possible buffer overrun with invalid UTF-8;
+ fix bug when compiled with no regex; fix non-match search.
+v476 5/3/15 Update man pages.
+v477 5/19/15 Fix off-by-one in jump_forw_buffered;
+ don't add FAKE_* files to cmd history.
+v478 5/21/15 Fix nonportable pointer usage in hilite tree.
+v479 7/6/15 Allow %% escapes in LESSOPEN variable.
+v480 7/24/15 Fix bug in no-regex searches; support MSVC v1900.
+v481 8/20/15 Fix broken -g option.
+*/
+
+char version[] = "481";
--- /dev/null
+/* Generated by "./mkutable -f1 W -- unicode/EastAsianWidth.txt" on Mon Jul 14 16:21:23 PDT 2014 */
+ { 0x1100, 0x1100 }, /* W */
+ { 0x2329, 0x232a }, /* W */
+ { 0x2e80, 0x2e80 }, /* W */
+ { 0x2e9b, 0x2e9b }, /* W */
+ { 0x2f00, 0x2f00 }, /* W */
+ { 0x2ff0, 0x2ff0 }, /* W */
+ { 0x3001, 0x3001 }, /* W */
+ { 0x3004, 0x3012 }, /* W */
+ { 0x3014, 0x301e }, /* W */
+ { 0x3020, 0x3021 }, /* W */
+ { 0x302a, 0x302a }, /* W */
+ { 0x302e, 0x302e }, /* W */
+ { 0x3030, 0x3031 }, /* W */
+ { 0x3036, 0x3036 }, /* W */
+ { 0x3038, 0x3038 }, /* W */
+ { 0x303b, 0x303e }, /* W */
+ { 0x3041, 0x3041 }, /* W */
+ { 0x3099, 0x3099 }, /* W */
+ { 0x309b, 0x309b }, /* W */
+ { 0x309d, 0x309d }, /* W */
+ { 0x309f, 0x30a1 }, /* W */
+ { 0x30fb, 0x30fc }, /* W */
+ { 0x30ff, 0x30ff }, /* W */
+ { 0x3105, 0x3105 }, /* W */
+ { 0x3131, 0x3131 }, /* W */
+ { 0x3190, 0x3190 }, /* W */
+ { 0x3192, 0x3192 }, /* W */
+ { 0x3196, 0x3196 }, /* W */
+ { 0x31a0, 0x31a0 }, /* W */
+ { 0x31c0, 0x31c0 }, /* W */
+ { 0x31f0, 0x31f0 }, /* W */
+ { 0x3200, 0x3200 }, /* W */
+ { 0x3220, 0x3220 }, /* W */
+ { 0x322a, 0x322a }, /* W */
+ { 0x3250, 0x3251 }, /* W */
+ { 0x3260, 0x3260 }, /* W */
+ { 0x3280, 0x3280 }, /* W */
+ { 0x328a, 0x328a }, /* W */
+ { 0x32b1, 0x32b1 }, /* W */
+ { 0x32c0, 0x32c0 }, /* W */
+ { 0x3300, 0x3300 }, /* W */
+ { 0x3400, 0x3400 }, /* W */
+ { 0x4db6, 0x4db6 }, /* W */
+ { 0x4e00, 0x4e00 }, /* W */
+ { 0x9fcd, 0x9fcd }, /* W */
+ { 0xa000, 0xa000 }, /* W */
+ { 0xa015, 0xa016 }, /* W */
+ { 0xa490, 0xa490 }, /* W */
+ { 0xa960, 0xa960 }, /* W */
+ { 0xac00, 0xac00 }, /* W */
+ { 0xf900, 0xf900 }, /* W */
+ { 0xfa6e, 0xfa6e }, /* W */
+ { 0xfa70, 0xfa70 }, /* W */
+ { 0xfada, 0xfada }, /* W */
+ { 0xfe10, 0xfe10 }, /* W */
+ { 0xfe17, 0xfe19 }, /* W */
+ { 0xfe30, 0xfe31 }, /* W */
+ { 0xfe33, 0xfe33 }, /* W */
+ { 0xfe35, 0xfe45 }, /* W */
+ { 0xfe47, 0xfe49 }, /* W */
+ { 0xfe4d, 0xfe4d }, /* W */
+ { 0xfe50, 0xfe50 }, /* W */
+ { 0xfe54, 0xfe54 }, /* W */
+ { 0xfe58, 0xfe5f }, /* W */
+ { 0xfe62, 0xfe64 }, /* W */
+ { 0xfe68, 0xfe6a }, /* W */
+ { 0x1b000, 0x1b000 }, /* W */
+ { 0x1f200, 0x1f200 }, /* W */
+ { 0x1f210, 0x1f210 }, /* W */
+ { 0x1f240, 0x1f240 }, /* W */
+ { 0x1f250, 0x1f250 }, /* W */
+ { 0x20000, 0x20000 }, /* W */
+ { 0x2a6d7, 0x2a6d7 }, /* W */
+ { 0x2a700, 0x2a700 }, /* W */
+ { 0x2b735, 0x2b735 }, /* W */
+ { 0x2b740, 0x2b740 }, /* W */
+ { 0x2b81e, 0x2b81e }, /* W */
+ { 0x2f800, 0x2f800 }, /* W */
+ { 0x2fa1e, 0x2fa1e }, /* W */
+ { 0x30000, 0x30000 }, /* W */
projects / oss / less.git / commitdiff