source: vendor/diffutils/2.8.1/ChangeLog@ 3701

2002-04-05  Paul Eggert  <eggert@sic.twinsun.com>

        * NEWS, configure.ac (AC_INIT): Version 2.8.1.

        * configure.ac (AC_HEADER_STDBOOL): Add.
        (AC_CHECK_HEADERS): Remove stdbool.h.
        * m4/stdbool.m4: New file.
        * m4/prereq.m4 (jm_PREREQ_EXCLUDE):
        Use AC_HEADER_STDBOOL rather than AC_CHECK_HEADERS(stdbool.h).
        (jm_PREREQ_HASH): Likewise.

        * src/system.h (SSIZE_MAX): Define if limits.h doesn't.

        * src/analyze.c (diff_2_files): Assign PTRDIFF_MAX - 1 to a
        size_t variable, just in case there's a problem with ptrdiff_t
        versus size_t.

        * lib/cmpbuf.c (errno): Remove decl; K&R C is no longer supported.
        Include limits.h.
        (SIZE_MAX, SSIZE_MAX): Define if standard headers don't.
        (MIN): New macro.
        (block_read): Do not attempt to read more than SSIZE_MAX bytes, as the
        resulting behavior is implementation-defined.  Work around bug in
        Tru64 5.1, which can't read more than INT_MAX bytes at a time.
        * src/cmp.c (cmp): Use block_read instead of read, to work
        around Tru64 5.1 bug.
        * src/diff3.c (read_diff): Likewise.
        * src/diff3.c: Include cmpbuf.h.

        * THANKS: Add Ulrich Drepper.

        * INSTALLME: Mention GNU texinfo.

        * doc/diff.texi:
        Use new @copying directive.
        Put @contents first, not last, since Texinfo now suggests this.
        Fix bug in -w documentation noted by Karl Berry.
        Mention links for speedup.
        New node "Speedups" for future speedups.
        Just say "Index", not "Concept Index".

2002-03-26  Paul Eggert  <eggert@twinsun.com>

        * src/Makefile.am:
        (INCLUDES): Remove this obsolete macro, replacing it with:
        (AM_CPPFLAGS): New macro.

2002-03-26  Albert Chin-A-Young  <china@thewrittenword.com>

        * src/Makefile.am (datadir): Remove, as it conflicts with --datadir.

2002-03-26  Paul Eggert  <eggert@twinsun.com>

        * doc/diff.texi (dircategory GNU packages): Fix typo: a "* " was
        missing before the menu entry.  Bug diagnosed by Adam Heath.
        Also, put this dircategory after the Individual utilities dircategory,
        to work around a compatibility problem with Debian install-info.
        
2002-03-24  Eli Zaretskii  <eliz@is.elta.co.il>

        * src/io.c (sip): Do not mishandle buffered count when reverting
        to text mode.

2002-03-23  Paul Eggert  <eggert@twinsun.com>

        * NEWS, configure.ac (AC_INIT): Version 2.8.
        * configure.ac (AC_PREREQ): 2.53.
        * INSTALLME: Upgrade to gettext 0.11.1 and help2man 1.27.

        * doc/diff.texi: Upgrade the description of `patch' to GNU patch
        2.5.4, and revamp the documentation accordingly.

        * src/diff.c (main): Fix typo that prevented diff -y from working.
        Bug reported by Mitsuru Chinen.

2002-03-15  Paul Eggert  <eggert@twinsun.com>

        * lib/c-stack.c (c_stack_die) [!HAVE_SIGINFO_T]: Don't use info.
        Bug reported by Eli Zaretskii.

2002-03-15  Eli Zaretskii  <eliz@is.elta.co.il>

        * ms/config.sed: Tweak editing of install-info-am target.

2002-03-12  Paul Eggert  <eggert@twinsun.com>

        * NEWS, configure.ac (AC_INIT): Version 2.7.10.

        * NEWS: cmp -l -s and cmp -s -l are not allowed.
        Deprecate diff -h, -H, -L, -P, --inhibit-hunk-merge.

        * configure.ac (jm_PREREQ_HARD_LOCALE): Add.
        (AM_INIT_AUTOMAKE): Do not distribute shar file.

        * doc/diff.texi (Overview): byte != character.
        (Detailed Context, Detailed Unified, Alternate Names, diff Options):
        Do not document diff -L.
        (Comparing Directories, Making Patches, diff Options):
        Do not document diff -P.
        (diff Performance, sdiff Option Summary, diff Options, sdiff Options):
        Do not document diff -H.
        (diff Performance, diff Options): Do not document --horizon-lines.
        (cmp Options): Prefer -b to -c.
        (cmp Options, diff Options, diff3 Options, patch Options,
        sdiff Options): Put short options next to the similar long options.
        Document --help, and use the same wording for --verbose.
        (diff3 Options): Fix typo in description of -E, which used wrongly used
        "-e" instead of "-E".

        * lib/hard-locale.c (alloca): Remove.
        Include stdlib.h if available, for malloc.
        (hard_locale): Use malloc, not alloca, so that we need not worry about
        alloca issues.  Test for storage allocation failure.

        * m4/prereq.m4 (jm_PREREQ): Add jm_PREREQ_HARD_LOCALE.
        (jm_PREREQ_HARD_LOCALE): New macro.

        * src/cmp.c (specify_comparison_type): New function.
        (check_stdout): "indices and codes" -> "byte numbers and values"
        (main): Detect clashing options.
        (cmp): Use "byte" rather than "char" if a translation for "byte"
        is available, even when in the POSIX locale.

        * src/diff.c (option_help_msgid): Do not document -L, -P,
        --horizon-lines, --inhibit-hunk-merge, -H.
        * src/diff.h: -L -> --label

2002-03-11  Paul Eggert  <eggert@twinsun.com>

        * NEWS, configure.ac (AC_INIT): Version 2.7.9.

        * INSTALLME: Update to autoconf 2.53, automake 1.6, help2man
        1.25 with patch.

        * configure.ac (AC_INIT):
        Change package name from diff to diffutils.
        (AM_INIT_AUTOMAKE): Use new form, with option gnits,
        rather than old from that duplicated AC_INIT.
        (AM_MISSING_PROG): Add help2man.
        (REGEX_MALLOC): Define.
        (AC_CONFIG_FILES): Add man/Makefile.

        * Makefile.am (AUTOMAKE_OPTIONS): Remove.
        * doc/Makefile.am (AUTOMAKE_OPTIONS): Remove.
        * lib/Makefile.am (AUTOMAKE_OPTIONS): Likewise.
        * ms/Makefile.am (AUTOMAKE_OPTIONS): Likewise.
        * src/Makefile.am (AUTOMAKE_OPTIONS): Likewise.

        * lib/c-stack.c: Include <errno.h>
        (ENOTSUP): Define if errno.h doesn't.
        (SA_NODEFER, SA_ONSTACK, SA_RESETHAND, SA_SIGINFO, SIGSTKSZ,
        _SC_PAGESIZE, ALTERNATE_STACK_SIZE, stack_t, sigaltstack):
        Remove; we now assume them all when
        HAVE_XSI_STACK_OVERFLOW_HEURISTIC, so we don't need
        substitutes.
        (<ucontext.h>): Include only if HAVE_XSI_STACK_OVERFLOW_HEURISTIC.
        (alternate_signal_stack): Now of size SIGSTKSZ.
        (segv_handler): Simplify, under the assumption that
        HAVE_XSI_STACK_OVERFLOW_HEURISTIC is nonzero.
        (c_stack_action): Likewise.
        (exit_failure) [DEBUG]: Initialize to 0, not 1.
        (recurse, main) [DEBUG]: Remove main args.

        * m4/c-stack.m4 (AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC): Change
        wording of message.  Do not check for stdbool.h or ucontext.h,
        or for ucontext_t or sigaction or sigaltstack.

        * po/LINGUAS: Add zh_TW.
        
        * Makefile.am (SUBDIRS): Add man.
        * man/Makefile.am: New file.
        * src/cmp.c (usage): Reword for help2man.
        * src/diff.c (option_help_msgid): Likewise.
        * src/diff3.c (option_help_msgid, usage): Likewise.
        * src/sdiff3.c (option_help_msgid, usage): Likewise.
        Reword for help2man.

        * THANKS: Add email address for Tower.

        * config/config.guess, config/config.sub, config/depcomp,
        config/install-sh, config/mdate-sh, config/missing,
        config/mkinstalldirs, config/texinfo.texi: Update
        to recent version (maintained in other packages).

2002-03-04  Bruno Haible <haible@ilog.fr>

        * m4/gettext.m4 (AM_GNU_GETTEXT): Set LIBINTL and LTLIBINTL to empty if
        no preinstalled GNU gettext was found.

2002-03-02  Eli Zaretskii  <eliz@is.elta.co.il>

        * ms/config.sed: Tweak editing of install-info-am and
        uninstall-info-am targets, to include 8+3-butchered names of Info
        files.

2002-02-28  Paul Eggert  <eggert@twinsun.com>

        * NEWS, configure.ac (AC_INIT, AM_INIT_AUTOMAKE): Version 2.7.8.

        * doc/diff.texi: Add vr index.
        Update copyright to 2002.
        (Standards conformance): New chapter.
        (Binary): Differing binary files are trouble unless the user asked for
        brief output.
        (Detailed Context): Prefer ISO time stamp format in discussion.
        (Detailed Unified, Pagination): Likewise.
        (Less Context): Likewise.  Also use short option.
        (Alternate Names): Separate option from arg.
        (Making Patches): Mention -U 2.
        (diff Options): Deprecate -LINES, as POSIX 1003.1-2001 does not
        allow it.

        * INSTALLME: Update advice for Solaris installation problems.
        We no longer use a test version of gettext.
        Autoconf test version updated from 2.52f to 2.52h.
        POSIX 1003.1-2001 patch for Automake.
        
        * configure.ac (AC__GNU_SOURCE): Add this,
        replacing AH_VERBATIM of _GNU_SOURCE.
        (tempname): Use AC_LIBOBJS, not LIBOBJS=, as now required by autoconf.
        (jm_PREREQ_C_STACK): Add.
        (AC_CONFIG_FILES): Remove intl/Makefile.
        (AM_GNU_GETTEXT): Add external arg, from gettext 0.11.

        * lib/c-stack.c, lib/c-stack.h, lib/exitfail.c, lib/exitfail.h,
        lib/posixver.c, lib/posixver.h, m4/c-stack.m4, m4/gnu-source.m4,
        po/cs.po, po/ja.po: New files.

        * intl/ChangeLog, intl/Makefile.in, intl/VERSION,
        intl/bindtextdom.c, intl/config.charset, intl/dcgettext.c,
        intl/dcigettext.c, intl/dcngettext.c, intl/dgettext.c,
        intl/dngettext.c, intl/explodename.c, intl/finddomain.c,
        intl/gettext.c, intl/gettextP.h, intl/gmo.h, intl/hash-string.h,
        intl/intl-compat.c, intl/l10nflist.c, intl/libgnuintl.h,
        intl/loadinfo.h, intl/loadmsgcat.c, intl/localcharset.c,
        intl/locale.alias, intl/localealias.c, intl/localename.c,
        intl/ngettext.c, intl/os2compat.c, intl/os2compat.h, intl/osdep.c,
        intl/plural-eval.c, intl/plural-exp.c, intl/plural-exp.h,
        intl/plural.c, intl/plural.y, intl/ref-add.sin, intl/ref-del.sin,
        intl/textdomain.c, m4/isc-posix.m4, m4/libtool.m4: Remove.

        * ABOUT-NLS: Update to Gettext 0.11.

        * Makefile.am (SUBDIRS): Remove intl.

        * config/config.guess, config/config.rpath, config/config.sub,
        config/texinfo.tex, config/depcomp, config/texinfo.tex,
        lib/tempname.c: Update to latest version from other packages.

        * lib/xalloc.h (xalloc_exit_failure): Remove; subsumed by exit_failure.
        * lib/xmalloc.c: Include exitfail.h.
        (xalloc_exit_failure): Remove; subsumed by exit_failure.
        All uses changed.

        * lib/Makefile.am (noinst_HEADERS): Add c-stack.h, exitfail.h.
        (libdiffutils_a_SOURCES): Add c-stack.c, exitfail.c, quotesys.c.
        (INCLUDES): Remove.

        * lib/cmpbuf.h (buffer_lcm): New arg LCM_MAX.
        * lib/cmpbuf.c: Include errno.h.
        (errno): Declare if !STDC_HEADERS.
        Include signal.h.
        (SA_RESTART): Define if not already defined.
        Include <inttypes.h>.
        (PTRDIFF_MAX): Define if not already defined.
        (TYPE_SIGNED, TYPE_MINIMUM, TYPE_MAXIMUM): Likewise.
        (block_read): Accommodate ancient AIX hosts that set errno to EINTR
        after uncaught SIGCONT.
        (buffer_lcm): Return a reasonable size if the multiple is too large.
        New arg LCM_MAX.  All callers changed.

        * lib/hard-locale.c: Include "hard-locale.h".
        (hard_locale): Ignore ENABLE_NLS, since we want to operate on
        locales other than LC_MESSAGES.

        * m4/prereq.m4 (jm_PREREQ): Add jm_PREREQ_POSIXVER.
        (jm_PREREQ_POSIXVER): New macro.

        * m4/setmode.m4 (AC_FUNC_SETMODE_DOS):
        Check for fcntl.h and unistd.h unconditionally.
        Suggested by Bruno Haible.
        
        * po/LINGUAS: Add cs, ja.
        * po/POTFILES.in: Add lib/c-stack.c, src/dir.c.

        * src/Makefile.am (datadir): @DATADIRNAME@ -> share.
        (INCLUDES): Remove intl.
        (LDADD): Change INTLLIBS to LIBINTL.
        No longer need to link libdiffutils.a twice.

        * src/analyze.c (diff_2_files):
        Avoid arithmetic overflow in buffer size calculation.

        * src/cmp.c: Include c-stack.h, exitfail.h.
        (hard_locale_LC_MESSAGES): Depend on ENABLE_NLS.
        (try_help, check_stdout, main, cmp): 2 -> EXIT_TROUBLE.
        (main): Check for stack overflow.
        0 -> EXIT_SUCCESS.
        1 -> EXIT_FAILURE.
        (cmp): Likewise.
        Accommodate ancient AIX hosts that set errno to
        EINTR after uncaught SIGCONT.

        * src/context.c (pr_context_hunk):
        Do not dump core if an enormous context causes an
        arithmetic overflow.
        (pr_unidiff_hunk): Likewise.
        (find_hunk): Likewise.

        * src/diff.h: unsigned -> unsigned int.
        * src/diff.c: Include c-stack.h, exitfail.h.
        Do not include signal.h.
        (specify_style, specify_value): Bring these routines back, as POSIX
        requires that the order of options not matter.
        (shortopts): New constant.
        (group_format_option, line_format_option): New constants.
        (main): 0 -> EXIT_SUCCESS, 1 -> EXIT_FAILURE, 2 -> EXIT_TROUBLE.
        Ensure that order of options does not matter.
        Check for stack overflow.
        If contexts overflow, substitute LIN_MAX, as that's good enough.
        If multiple contexts are specified, use their maximum.
        -c is equivalent to -C 3 now, instead of having an implicit context;
        likewise for -u and -U 3.
        Use specify_style and specify_value.
        (SIGCHLD): Do not define; now done in a header.
        Use new style time stamp format for -u / -U.
        Reject numeric-string options if operating in POSIX 1003.1-2001 mode.
        Avoid overflow problems with tab width.
        Simplify from-file and to-file code.
        (usage): Do not mention obsolete options.
        (filetype): Do not mention whether a file is executable.
        Add typed memory objects.
        (compare_files): 0 -> EXIT_SUCCESS, 1 -> EXIT_FAILURE, 2 ->
        EXIT_TROUBLE.

        * src/diff3.c: Include c-stack.h, exitfail.h.
        (ALLOCATE): Remove.  All uses changed to xmalloc, or to xmalloc plus
        an overflow check.
        (myread): Remove.
        (main): Check for stack overflow.
        0 -> EXIT_SUCCESS, 1 -> EXIT_FAIULRE, 2 -> EXIT_TROUBLE.
        (try_help): Likewise.
        (process_diff): Check for integer overflow, to avoid core dumps.
        2 -> EXIT_TROUBLE.
        (read_diff): Exit with status 126 if the file is not executable,
        for compatibility with POSIX 1003.1-2001.
        Accommodate ancient AIX hosts that set errno to EINTR after uncaught
        SIGCONT.
        Check for integer overflow to avoid core dumps.
        (fatal, perror_with_exit): 2 -> EXIT_TROUBLE.

        * src/dir.c (dir_read):
        Ignore st_size of directories: POSIX says it's garbage.
        Check for integer overflow to avoid core dumps.
        (diff_dirs): 0 -> EXIT_SUCCESS, 2 -> EXIT_TROUBLE.

        * src/ifdef.c: Include <xalloc.h>.
        (format_group, print_ifdef_lines): Avoid core dumps with bad formats.
        (do_printf_spec): Avoid alloca.

        * src/io.c (sip):
        Avoid integer overflow and core dumps if buffer alignments are
        preposterously incompatible.
        (slurp): Do not dump core if the file is growing as we read it.
        If a regular file grows, keep reading until we catch up with its EOF.
        (find_and_hash_each_line): Check for integer overflow to avoid cores.
        (GUESS_LINES): Remove.
        (guess_lines): New function.  Avoid integer overflow.
        (find_identical_ends): Use it.
        Avoid integer overflow and possible core dumps.

        * src/sdiff.c: Include c-stack.h, exitfail.h.  Do not include signal.h.
        0 -> EXIT_SUCCESS, 1 -> EXIT_FAILURE, 2 -> EXIT_TROUBLE.
        (ck_editor_status): New function.
        (main): Check for stack overflow.
        Adopt POSIX convention for subsidiary programs not found.
        (diffarg): Check for integer overflow to avoid core dumps.
        (trapsigs): Remove SA_INTERRUPT special case; now done by header.
        (SIGCHLD): Likewise.
        (edit): Adopt POSIX convention for subsidiary programs not found.

        * src/side.c: unsigned -> unsigned int.

        * src/system.h: Don't use alloca or include <alloca.h>.
        unsigned -> unsigned int
        (EXIT_SUCCESS, EXIT_FAILURE, EXIT_TROUBLE): Define if not defined.
        Include signal.h.
        (SA_RESTART): Define if not defined.
        (SIGCHLD): Likewise.
        
        * src/util.c: 2 -> EXIT_TROUBLE.
        Adopt POSIX convention for ENOEXEC and exit status 126.
        unsigned -> unsigned int

2002-01-24  Paul Eggert  <eggert@twinsun.com>

        * NEWS, configure.ac (AC_INIT, AM_INIT_AUTOMAKE): Version 2.7.7.

        * intl/plural.c: Regenerate with Bison 1.31.

        * ABOUT-NLS, intl/*: Update to Gettext 0.11-pre5++.
        * INSTALL: Update to Autoconf 2.52f.

        * INSTALLME: New file.
        * Makefile.am (EXTRA_DIST): Add config/config.rpath, INSTALLME.
        (DISTCLEANFILES): Remove.
        * NEWS: Reformat for imminent 2.8 release.
        * README: Mention INSTALLME.
        * README-alpha: Move most of contents to INSTALLME.
        * THANKS: Add Bruno Haible, Jim Meyering, and Eli Zaretskii.

        * config: New subdirectory, containing the following files from .:
        config.guess, config.sub, depcomp, missing, install-sh, mkinstalldirs.
        Move the following files here from doc: texinfo.tex, mdate-sh.
        * config/config.guess, config/config.sub, config/texinfo.tex:
        Update to latest version from FSF.
        * config/config.rpath: New file, from Gettext 0.11-pre5++.

        * configure.ac (AC_INIT): Use new 3-arg form.
        (AC_CONFIG_SRCDIR): Specify src/diff.c here, not in AC_INIT.
        (ALL_LINGUAS): Remove: now in po/LINGUAS as per Gettext 0.11.
        (AC_CONFIG_AUX_DIR): New macro invocation.

        * lib/Makefile.am (noinst_HEADERS): Add gettext.h.
        * lib/gettext.h: New file, from Gettext 0.11-pre5++.
        * lib/prepargs.c: Include <string.h>.  Reported by Bruno Haible.

        * m4/codeset.m4, m4/gettext.m4, glibc21.m4, iconv.m4, isc-posix.m4,
        lcmessage.m4, progtest.m4: Upgrade to Gettext 0.11-pre5++.
        * m4/lib-ld.m4, m4/lib-link.m4, m4/lib-prefix.m4: New files, from
        Gettext 0.11-pre5++.

        * po/LINGUAS: New file.
        * po/Makefile.in.in: Upgrade to Gettext 0.11-pre5++.
        * po/Makevars, po/Rules-quot, po/boldquot.sed: New files,
        from Gettext 0.11-pre5++.

        * src/cmp.c (copyright_string): Update to 2002.
        * src/diff.c (copyright_string): Likewise.
        * src/diff3.c (copyright_string): Likewise.
        * src/sdiff.c (copyright_string): Likewise.

        * src/cmp.c (bytes, parse_ignore_initial, cmp): Use UINTMAX_MAX
        instead of (uintmax_t) -1, to avoid warnings on some compilers.
        * src/io.c (file_block_read): Likewise, for SIZE_MAX.

        * src/cmp.c (usage): Reformat messages to ease translation.
        * src/diff3.c (usage): Likewise.
        * src/sdiff.c (usage): Likewise.

        * src/diff3.c (main): Remove unused variable.

        * src/dir.c: Include <setjmp.h>
        (struct dirdata): New member nnames.
        (locale_specific_sorting, failed_strcoll): New vars.
        (dir_read): Renamed from dir_sort.  Don't sort the dir.
        Set new nnames member of struct dirdata.  All callers changed.
        (compare_names): Don't check for errno after strcasecmp.
        Use strcoll only if locale_specific_sorting is nonzero.
        If strcoll fails, longjmp out rather than returning a value
        that might result in an invalid comparison function that might
        make qsort dump core.
        (diff_dirs): Sort the directory ourselves.  Use setjmp to recover
        from strcoll failure, falling back on native byte comparison.
        Make local variables volatile if they need to preserve their value
        after setjmp/longjmp.

        * src/sdiff.c (handler_index_of_SIGINT, handler_index_of_SIGPIPE):
        New macros.
        (main): Do not confuse signal numbers with their indices.
        Bug reported by Bruno Haible.
        (edit): Cat lin to long before printing with %ld, since lin might
        be narrow than long.

        * src/system.h (UINTMAX_MAX): New macro.
        Include gettext.h, not libgettext.h.
        (N_): Do not wrap arg in parentheses.  Fix from Bruno Haible.

        * src/util.c (finish_output): Ensure that werrno is initialized.
        (lines_differ): Have an explicit do-nothing case for
        IGNORE_NO_WHITE_SPACE, to pacify gcc -Wall.

2001-12-29  Eli Zaretskii  <eliz@is.elta.co.il>

        * src/sdiff.c (interact): After extracting rlen from the editor
        command, test for a terminating null character, not for a newline.

        * ms/config.bat: Allow longer source directory names without
        overflowing the line length limits.  Create the cache in the
        build directory, not in the source directory
        * ms/config.sed: Fix AC_CONFIG_LINKS for when symlinks are
        unavailable.

2001-12-23  Paul Eggert  <eggert@twinsun.com>

        * NEWS, configure.ac (AM_INIT_AUTOMAKE): Version 2.7.6.

        * configure.ac (ALL_LINGUAS): Add tr.

        * src/util.c (begin_output):
        Have child exit with status 127 rather than reporting
        failure on its own.  Set errno to 0 before invoking popen.
        (finish_output): Report errno on pclose failure.
        Distinguish between subsidiary program not found, and failure.

        * src/sdiff.c (not_found, execdiff): Remove.
        (DIFF_PROGRAM_OPTION): New constant.
        (longopts, option_help_msgid, main): Add --diff-program=PROGRAM.
        (check_stdout): New function.
        (main): Remove DIFF_PROGRAM.  Check stdout after printing version.
        Use check_stdout after printing help.  Use execvp/perror_fatail rather
        than execdiff.  Set errno to 0 before invoking popen.
        Check for pclose failure properly.
        (main, edit): If child exec fails, exit with 127 rather than trying to
        print diagnostic.
        Distinguish between subsidiary program failing and not being found.
        (edit): Handle signals the same way, regardless of whether we're using
        system or fork+exec.  Check for system returning -1.

        * src/diff3.c (DIFF_PROGRAM_OPTION, HELP_OPTION): New constants.
        (longopts, main): Use them.
        (longopts, main, option_help_msgid): New option --diff-option=PROGRAM.
        (main): Remove DIFF_PROGRAM support.
        Check stdout after printing version.
        (check_stdout): Report errno info if fclose fails.
        (read_diff): Have child exit with status 127 when program is not found,
        rather than trying to have the child report failure.  Check for
        pclose returning -1.

        * src/diff.c (DEFAULT_WIDTH): Remove.
        (main): Use 130 instead of DEFAULT_WIDTH, since it's not really
        builder-settable.  Do not prepend DIFF_OPTIONS.
        (check-stdout): If fclose (stdout) fails, print errno info.
        (option_help_msgid): Default context is 3, not 2.
        (usage): Work even if ptrdiff_t is wider than int.

        * doc/diff.texi (diff Options): Remove DIFF_OPTIONS.
        (Invoking diff3, Invoking sdiff): Remove DIFF_PROGRAM.
        (diff3 Options, sdiff Options): Add --diff-program.

        * src/cmp.c (valid_suffixes):
        Add '0', to support suffixes like "MB" and "MiB".
        (check_stdout): Don't assume that the translations of "write failed"
        and of "standard output" lack '%'.
        (main): Check stdout after printing version.

        * lib/setmode.c: [HAVE_FCNTL_H && HAVE_SETMODE_DOS]: Include <fcntl.h>.
        [!HAVE_SETMODE_DOS]: Do not include <unistd.h>.
        (set_binary_mode): Return mode (not 1) if fd is a tty.
        Do not assume that O_TEXT is zero.

        * doc/diff.texi (cmp Options):
        In byte counts, a plain suffix (without any integer)
        is assumed to modify the integer 1.  Index terms like "kibibyte".
        Document plain "k".

        (Reporting Bugs): Mention bug-report archive and test version
        location.  Ask for "diff --version" in bug reports.

2001-12-13  Paul Eggert  <eggert@twinsun.com>

        * src/diff.c (DEFAULT_WIDTH): Remove; couldn't be changed without
        also changing option_help_msgid.  All uses replaced with 130.

        * lib/setmode.c: Include fcntl.h and unistd.h only if
        HAVE_SETMODE_DOS.
        (setmode): Assume a file is binary unless the mode is O_TEXT.
        * ms/README: Fix minor typos.

2001-12-13  Eli Zaretskii  <eliz@is.elta.co.il>

        * ms/README: New file.

        * lib/setmode.c (set_binary_mode) [HAVE_SETMODE_DOS]: Don't assume
        O_TEXT has a zero value.  If FD is a terminal device, do nothing
        and return MODE, thus pretending that it was already in the
        requested MODE.
        [HAVE_FCNTL_H]: Include fcntl.h (needed for O_BINARY).

        * ms/config.sed: Remove the split prevention of config.status.
        Fix Sed commands for converting absolute file names into
        top_srcdir-relative ones.

        * ms/config.bat: Fix typos.

2001-12-12  Neal H Walfield  <neal@cs.uml.edu>

        * diff.c (option_help_msgid): Correct the default context width
        from 2 to 3.

2001-12-11  Paul Eggert  <eggert@twinsun.com>

        * m4/Makefile.am.in: Remove jm-glibc-io.m4

        * NEWS, configure.ac (AM_INIT_AUTOMAKE): Version 2.7.5.

        * configure.ac (PR_PROGRAM): Use AC_DEFINE_UNQUOTED, so that
        $PR_PROGRAM is expanded by sh.
        (ptrdiff_t, ssize_t): Use AC_CHECK_TYPE with a default of int,
        not AC_CHECK_TYPES.
        (jm_AC_DOS, AC_FUNC_SETMODE_DOS): New macros.
        (AC_CONFIG_FILES): Add ms/Makefile.

        * doc/diff.texi: Add --no-ignore-file-name-case.
        File name case sensitivity now affects file name exclusion.
        Fix typos.

        * src/util.c: Include dirname.h.
        (dir_file_pathname): Use base_name rather than file_name_lastdirchar.

        * src/system.h (S_IXUSR, S_IXGRP, S_IXOTH): New macros.
        Include <libgettext.h> rather than rolling it ourselves.
        (file_name_lastdirchar, HAVE_SETMODE, set_binary_mode): Remove.

        * src/sdiff.c: Include <dirname.h>.
        (expand_name): Use base_name rather than file_name_lastdirchar, for
        portability to DOS.
        (main): Initialize xalloc_exit_failure before possibly invoking
        any memory allocator.

        * src/io.c: Include setmode.h.

        * src/diff3.c (main):
        Initialize xalloc_exit_failure before possibly invoking any memory
        allocator.

        * src/diff.c: Include dirname.h, setmode.h.

        (main): Later values and/or styles now silently override earlier.
        (specify_value, specify_style): Likewise.  All callers changed.
        Remove.
        (binary, main, option_help_msgid, compare_files):
        HAVE_SETMODE -> HAVE_SETMODE_DOS.
        (NO_IGNORE_FILE_NAME_CASE_OPTION): New constant.
        (longopts, main, option_help_msgid): Support it.
        (exclude_options): New function.
        (main): Use it. Initialize xalloc_exit_failure before potentially
        allocating memory.

        (filetype): Distinguish executable files from others, as POSIX
        suggests.

        (compare_files): Use base_name instead of file_name_lastdirchar.

        * src/cmp.c: Include <hard-locale.h>, <setmode.h>.
        (hard_locale_LC_MESSAGES): New macro.
        (sprintc): Remove int width arg; it's now the caller's responsibility
        to pad.  All callers changed.
        (stat_buf): New static var; was formerly a local var in 'main'.
        (valid_suffixes): Add 'K', for 'KiB'.
        (option_help_msgid): Don't confuse bytes with characters.
        (main): Set xalloc_exit_failure before invoking anything that might
        allocate memory.  Fix bug: -n was incorrectly ignored when optimizing
        the case of regular files with different lengths.
        (cmp): Use an index column wide enough to store this comparison's
        indexes.  In locales other than the POSIX locale, say "byte"
        rather than "char".

        * ms/config.bat: pc -> ms

        * ms/Makefile.am, m4/setmode.m4, lib/setmode.c, lib/setmode.h:
        New file.

        * lib/Makefile.am (noinst_HEADERS): Add dirname.h, setmode.h.
        (libdiffutils_a_SOURCES): Add basename.c, setmode.c.

        * Makefile.am (SUBDIRS): Add ms.

2001-12-10  Paul Eggert  <eggert@twinsun.com>

        * m4/fnmatch.m4: Test for FNM_CASEFOLD.

2001-12-03  Paul Eggert  <eggert@twinsun.com>

        * lib/posix/regex.h: Fix copyright notice.

2001-12-03  Paul Eggert  <eggert@twinsun.com>

        * NEWS, configure.ac (AM_INIT_AUTOMAKE): Version 2.7.4.

        * diff.texi (direntry, Overview, Comparison, Binary, Invoking cmp):
        Use "byte" rather than "character" when talking about cmp, since
        it compares bytes, not character.
        (Invoking cmp): New trailing operands FROM-SKIP and TO-SKIP.
        -i or --ignore-initial now accepts FROM-SKIP:TO-SKIP.
        New option -n or --bytes.
        Count operands now may be in octal or hex, and may be followed by a
        size multiplier.

        * configure.ac (DEFAULT_DIFF_PROGRAM):
        Define to "diff", not "$bindir/diff" (which didn't work anyway).
        (AC_CHECK_MEMBERS): Add struct stat.st_blksize, struct stat.st_rdev.
        (AC_STRUCT_ST_BLKSIZE, AC_STRUCT_ST_RDEV): Remove; obsolescent.
        (AC_FUNC_FORK): Use this, instead of obsolescent AC_FUNC_VFORK.
        (AC_CONFIG_FILES, AC_CONFIG_COMMANDS): Add.
        (AC_OUTPUT): Remove args; they were obsolescent.

        * util.c (setup_output, begin_output, finish_output):
        HAVE_FORK -> HAVE_WORKING_FORK || HAVE_WORKING_VFORK.
        * sdiff.c (diffpid, cleanup, main, edit): Likewise.
        * diff3.c (read_diff): Likewise.

        * system.h (STAT_BLOCKSIZE):
        Use HAVE_STRUCT_STAT_ST_BLKSIZE, not HAVE_ST_BLKSIZE.
        (vfork): New macro.
        (HAVE_FORK): Remove.
        (set_binary_mode): New macro.

        * sdiff.c (main): HAVE_VFORK -> HAVE_WORKING_VFORK.
        (edit): Reopen the temporary file after the editor has run, in case
        the editor operates by unlinking the old file and linking a new one.
        (P_tmpdir): Rename from PVT_tmpdir; this fixes a typo.
        All uses changed.

        * io.c (sip, read_files):
        Remove tests for HAVE_SETMODE; use set_binary_mode
        instead of setmode.
        (sip): Fix typo in backward lseek when reverting to text mode.

        * config.site, config.sed, config.bat: New file.

        * Makefile.am (EXTRA_DIST): Add xstrtol.c.
        (noinst_HEADERS): Add xstrtol.h.
        (libdiffutils_a_SOURCES): Add xstrtoumax.c.

        * cmp.c: <xstrtol.h>: Include.
        (ignore_initial): Now an array with 2 elements.  All uses changed.
        (bytes): New var.
        (HELP_OPTION): New constant.
        (long_options, main): Use it.
        (long_options, option_help_msgid, main, cmp):
        Add support for -n or --bytes.
        (parse_ignore_initial): New function.
        (option_help_msgid, main): Add -i M:N.
        (usage, main): Add two optional trailing operands, a la BSD.
        (main): setmode -> set_binary_mode.
        (cmp): Report byte number of what we've seen, not of the entire file.
        This is to be consistent with the line number, which is always relative
        with what we've seen.

2001-12-02  Paul Eggert  <eggert@twinsun.com>

        * diff.c (main, compare_files): setmode -> set_binary_mode.

        * xstrtol.c (__xstrtol): Don't accept 'Ki'; require 'KiB'.

        * xstrtol.c (__xstrtol): Add support for IEC 60027-2.

2001-11-25  Paul Eggert  <eggert@twinsun.com>

        * NEWS, configure.ac (AM_INIT_AUTOMAKE): Version 2.7.3.

        * README-alpha: New file.

        * src/Makefile.am (INCLUDES): Add -I../lib, for regex.h.

        * configure.ac:
        Don't set LIB_CLOCK_GETTIME to 'none required'; set it to
        the empty string instead.

        * lib/Makefile.am (EXTRA_DIST): Add strtoimax.c, strtol.c.

        * Makefile.am (SUBDIRS): Put intl before lib, so that libintl.h exists.

        * lib/Makefile.am (noinst_HEADERS): Add unlocked-io.h.

        * configure.ac (__EXTENSIONS__): New define, for the unlocked macros.

        * README: Add copyright notice.
        Remove stuff that doesn't apply any more.

        * doc/diff.texi: offsets -> indices for cmp

        * src/cmp.c (option_help_msgid): offsets -> indices

        * src/diff.c (option_help_msgid):
        Don't mention --binary on POSIX hosts.

        * src/sdiff.c (STRIP_TRAILING_CR_OPTION): New constant.
        (longopts, option_help_msgid, main): Add -E, --ignore-tab-expansion,
        --strip-trailing-cr.

        * doc/diff.texi: Change direcategory from Utilities to GNU Packages.
        Add individual utilities.
        Switch to Free Documentation License.
        @code -> @command
        @samp -> @option
        GNU -> @sc{gnu}
        Expand tabs to spaces, except when in an example that actually
        uses tabs.
        Prefer @node with just one arg.
        Document -E or --ignore-tab-expansion, --strip-trailing-cr,
        --ignore-file-name-case.
        Regular expressions are now grep style, not Emacs style.
        cmp's -c or --print-chars option is now -b or --print-bytes.
        Time stamps now depend on LC_TIME.
        -p now implies ^[[:alpha:]$_].
        Flags now include ' and 0.
        cmp -i is an alias for --ignore-initial
        Document --from-file, --to-file.
        Document DIFF_OPTIONS.

        * configure.ac (AC_CHECK_FUNCS): Add gettimeofday, clock_gettime.
        (LIB_CLOCK_GETTIME): New subst.

        * src/system.h: Assume C89 or better.
        (_GNU_SOURCE): Remove; config.h now defines it.
        (alloca): Declare like coreutils does it.
        (verify, TYPE_SIGNED, TYPE_MINIMUM, TYPE_MAXIMUM, O_RDWR,
        S_IRUSR, S_IWUSR): New macros.
        (STAT_BLOCKSIZE): Parenthesize definiens.
        <inttypes.h>: Include if HAVE_INTTYPES_H.
        (CHAR_MAX, INT_MAX): Remove.
        (PTRDIFF_MAX, SIZE_MAX): New macros.
        (strtoumax): New decl.
        Include stddef.h.
        (bzero): Remove.
        (bindtextdomain, textdomain, N_): New macros.
        (ISPRINT, ISSPACE): Remove ifndef wrappers.
        (ISUPPER, ISDIGIT): Remove.
        (TOLOWER): New macro.
        (MIN): Renamed from min; all callers changed.
        (MAX): Likewise, from max.
        (lin): New type.
        (LIN_MAX): New macro.
        (file_name_cmp): Renamed from filename_cmp.  All callers changed.
        (file_name_lastdirchar): Renamed from file_name_lastdirchar.
        All callers changed.
        (could_be_mvfs_stat_bug, could_be_nfs_stat_bug,
        dev_may_have_duplicate_ino): Remove.
        (HAVE_SETMODE, NULL_DEVICE): New macros.
        (same_file): Do not check attributes.
        (same_file_attributes): New macro.

        * src/util.c: Assume C89 or better.
        int -> bool for booleans.
        int -> lin for line numbers.
        int -> size_t for sizes.
        Use angle-brackets when including quotesys.h.
        Include error.h, regex.h, xalloc.h.
        (message5): sizeof -> offsetof
        (begin_output): Invoke pr without -f.
        (lines_differ): Renamed from line_cmp, and return bool not 3-way int.
        All callers changed.
        Add support for IGNORE_TAB_EXPANSION.
        (change_letter): Now an array rather than a function.  All
        callers changed.
        (translate_range): Translate line numbers to long, not lin,
        for convenience with printf.
        (analyze_hunk): Return enum changes instead of a count of
        inserts and deletes.  All callers changed.
        (zalloc): New function.

        * src/side.c: Assume C89 or better.
        int -> bool for booleans.
        int -> lin for line numbers.

        * src/sdiff.c: Assume C89 or better.
        int -> bool for booleans.
        int -> lin for line numbers.
        Use angle-brackets when including getopt.h, quotesys.h.
        Include error.h, freesoft.h, stdio.h, xalloc.h.
        (copyright_string): Use only most recent year.
        (authorship_msgid, option_help_msgid): Wrap in N_().

        (tmpname): Now volatile.
        (tmpmade): Remove.
        (tmp): New var.
        (private_tempnam, exists, letters): Remove.
        (temporary_file): New function.
        (edit): Use it.
        (interact): Use strtoumax, not atoi.

        * src/normal.c: Assume C89 or better.
        int -> lin for line numbers.

        * src/io.c: Assume C89 or better.
        int -> bool for booleans.
        int -> lin for line numbers.
        int -> size_t for sizes.
        Use angle-brackets when including cmpbuf.h.
        Include regex.h, xalloc.h.
        (word): Remove; now done in system.h.
        (hash_value): New type; use it instead of 'unsigned' for hash values.
        (file_block_read): New function.
        (sip, slurp): Use it.  Now static.
        (sip): Ensure block size is a multiple of word size.  Clear eof flag.
        (slurp): Use xalloc_die to report memory exhaustion.
        (find_and_hash_each_line): Use TOLOWER instead of _tolower.
        Add support for IGNORE_TAB_EXPANSION.
        (prepare_text_end): Strip trailing CR if requested.
        (find_identical_ends): Prepare the text only once,
        if they're duplicates.
        Let the compiler take advantage more of the fact that the buffers are
        word-aligned.
        (primes): Remove.
        (prime_offset): New var.
        (read_var): Use prime_offset instead of primes.
        Use zalloc instead of xmalloc + bzero.

        * src/ifdef.c: Assume C89 or better.
        int -> lin for line numbers.
        (format_group): Use strtoumax to parse line numbers.
        (format_group, print_ifdef_lines): Use do_printf_spec to
        handle printf specs.
        (groups_letter_value): Don't use _tolower; it's locale-dependent.
        (do_printf_spec): Renamed from scan_printf_spec; now does the printing.

        * src/ed.c: Assume C89 or better.
        int -> lin for line numbers (or 'long' when that's more convenient).
        (print_ed_hunk): Fix bug when handling double-dot inserts.

        * src/dir.c: Assume C89 or better.
        int -> bool for booleans.
        Include error.h, exclude.h, xalloc.h.

        (dir_sort): Return 0 on error, 1 on success.  All callers changed.
        compare_names -> compare_names_for_qsort.

        (compare_names): Try strcasecmp if ignore_file_name_case.  Then try
        strcoll.  Use file_name_cmp only as a last resort.  Warn about
        strcasecmp or strcoll failure.
        (compare_names_for_qsort): New function.

        (diff_dirs): Use compare_names rather than filename_cmp.

        * src/diff3.c: Assume C89 or better.
        int -> bool for booleans.
        int -> lin for line numbers.
        Use angle-brackets when including getopt.h, quotesys.h.
        Include error.h, freesoft.h, inttostr.h, xalloc.h.
        (copyright_string): Use only most recent year.
        (authorship_msgid, option_help_msgid): Wrap in N_().

        Rename the following variables for consistency with user-visible
        option spellings.  All uses changed.
        (text): Renamed from always_text.
        (initial_tab): Renamed from tab_align_flag.

        (horizon_lines): Remove.  Remove all uses.

        (main): Invoke bindtextdomain and textdomain after setlocale.
        Rename "DIFF" to "DIFF_PROGRAM".

        Try to compare file0 to file1, because this is where changes are
        expected to come from.  Diffing between these pairs of files is more
        likely to avoid phantom changes from file0 to file1.
        However, use file2 as the common file if this is a 3-way diff,
        for backward compatibility.  Suggested by Karl Tomlinson.

        (create_diff3_block): Use xcalloc instead of malloc + bzero.

        (INT_STRLEN_BOUND): Remove; now in system.h.

        (read_diff): Always use --horizon-lines=100 rather than trying
        to guess it.
        Do not pass --inhibit-hunk-merge.
        Minimum chunk size is 1, not 8KiB.
        Use xalloc_die to report memory exhaustion.
        (undotlines): Use long for start, not int.

        * src/diff.h: Assume C89 or better.
        int -> bool for booleans.
        int -> lin for line numbers.
        Don't include regex.h.
        (enum changes): New enum.
        (enum line_class): Remove; subsumed by enum changes.
        (enum output_style): New constant OUTPUT_UNSPECIFIED.

        (ignore_space_change_flag, ignore_all_space_flag): Remove.
        (ignore_white_space): New decl, subsuming the above two.  All
        uses changed.

        Rename the following decls for consistency with user-visible
        option spellings.  All uses changed.
        (text): Renamed from always_text_flag.
        (ignore_blank_lines): Renamed from ignore_blank_lines_flag.
        (ignore_case): Renamed from ignore_case_flag.
        (brief): Renamed from no_details_flag.
        (initial_tab): Renamed from tab_align_flag.
        (expand_tabs): Renamed from tab_expand_flag.
        (starting_file): Renamed from dir_start_file.
        (paginate): Renamed from paginate_flag.
        (sdiff_merge_assist): Renamed from sdiff_help_sdiff.
        (left_column): Renamed from sdiff_left_only.
        (suppress_common_lines): Renamed from sdiff_skip_common_lines.
        (speed_large_files): Renamed from heuristic.
        (minimal): Renamed from no_discards.

        (inhibit_hunk_merge): Remove.

        (strip_trailing_cr, excluded, time_format): New decls.

        (files_can_be_treated_as_binary): Renamed from ignore_some_changes.

        (group_format, line_format): Now char const *[], not char *[].

        (struct file_data): Buffer is now word*, not char*, as it's always
        aligned and this can help the compiler.  buffered_chars -> buffered
        (since it's a byte count, not a char count).  All uses changed.
        New member `eof'.

        (FILE_BUFFER): New macro.

        (excluded_filename, error, free_software_msgid): Remove decls; now in
        other .h files.

        (sip, slurp): Remove decls.
        (file_block_read): New decl.
        (change_letter): Now an array, not a function.
        (lines_differ): Renamed from line_cmp.
        (analyze_hunk): Now returns enum changes rather than two change counts.

        * src/Makefile.am (diff_LDADD): New symbol.

        * src/diff.c: Assume C89 or better.
        int -> bool for booleans.
        long -> off_t for line numbers.
        Use angle-brackets when including getopt.h, fnmatch.h, quotesys.h.
        Include error.h, exclude.h, freesoft.h, hard-locale.h, prepargs.h,
        regex.h, signal.h, xalloc.h.
        (copyright_string): Use only most recent year.
        (authorship_msgid, option_help_msgid): Wrap in N_().

        Rename the following variables for consistency with user-visible
        option spellings.  All uses changed.
        (binary): Renamed from binary_flag.
        (new_file): Renamed from entire_new_file_flag.
        (unidirectional_new_file): Renamed from unidirectional_new_file_flag.
        (report_identical_files): Renamed from print_file_same_flag.

        (numeric_arg): Remove.

        (exclude, exclude_alloc, exclude_count, excluded_filename, add_exclude,
        add_exclude_file):
        Remove; now done by exclude.h.

        (BINARY_OPTION, FROM_FILE_OPTION, HELP_OPTION, HORIZON_LINES_OPTION,
        IGNORE_FILE_NAME_CASE_OPTION, INHIBIT_HUNK_MERGE_OPTION,
        LEFT_COLUMN_OPTION, LINE_FORMAT_OPTION, NORMAL_OPTION,
        SDIFF_MERGE_ASSIST_OPTION, STRIP_TRAILING_CR_OPTION,
        SUPPRESS_COMMON_LINES_OPTION, TO_FILE_OPTION,
        UNCHANGED_LINE_FORMAT_OPTION, OLD_LINE_FORMAT_OPTION,
        NEW_LINE_FORMAT_OPTION, UNCHANGED_GROUP_FORMAT_OPTION,
        OLD_GROUP_FORMAT_OPTION, NEW_GROUP_FORMAT_OPTION,
        CHANGED_GROUP_FORMAT_OPTION): New constants.
        (longopts, main): Use them.

        (longopts, main, option_help_msgid): Add -E, --from-file, --to-file.

        (main): Invoke bindtextdomain and textdomain after setlocale.
        Use grep syntax, not Emacs, for regular expressions.
        Use exclude.h, not our own functions.
        Use ISO 8601 time format in hard locales.
        Prepend DIFF_OPTIONS.
        Don't update ignore_some_changes.
        Use strtoumax instead of numeric_arg.
        Use specify_value when appropriate.
        error -> try_help when appropriate.
        -p now means ^[[:alpha:]$_], not ^[_a-zA-Z$].
        Ignore --inhibit-hunk-merge.
        Prefer changed group formats to unchanged ones.
        Remove now-unnecessary casts.
        Set files_can_be_treated_as_binary.

        (specify_value): Renamed from specify_format.  All uses changed.

        (specify_style): Default is now unspecified, not normal.  All
        uses changed.

        (set_mtime_to_now): New function.
        (compare_files): Use it.  Use memset, not bzero.
        Set stdin mtime to current time even when stdin is not a regular file.
        Check for same file attributes, as well as for same file.
        Use files_can_be_treated_as_binary.
        "write failed" -> "standard output on output failure.

        * src/context.c: Assume C89 or better.
        int -> lin for line numbers.
        Include inttostr.h, regex.h.
        (TIMESPEC_NS): New macro.
        (nstrftime): New decl.
        (print_context_label): Use nstrftime and time_format to format times.
        Print numeric time stamp value if localtime fails.
        (print_context_function): New function.
        (pr_context_hunk, pr_unidiff_hunk): Use it.
        (find_function): Use size_t for sizes, not int.

        * src/cmp.c: Assume C89 or better.
        int -> bool for booleans.
        long -> off_t for line numbers.
        Use angle-brackets when including cmpbuf.h, getopt.h.
        Include error.h, freesoft.h, inttostr.h, xalloc.h.
        (copyright_string): Use only most recent year.
        (authorship_msgid): Wrap in N_().
        (buffer): Now word*, not char*.  All uses changed.
        (word): Remove macro; now in system.h.
        (long_options, option_help_msgid, main): -c --print-chars ->
        -b --print-bytes
        (check_stdout): "write failed" -> "standard output"
        (option_help_msgid): Wrap in N_().
        (main): Invoke bindtextdomain and textdomain after setlocale.
        Use strtoumax instead of doing the work ourselves.
        Check for same_file_attributes as well as same_file.
        (cmp): Use ssize_t for read returns, not size_t.
        Do not assume that size_t is not narrower than int.
        Do not assume that line numbers fit in 'long'.
        (block_compare_and_count, block_compare):
        Compiler now checks that buffers are word-aligned.
        (block_compare_and_count): Count sizes with size_t, not long.
        (sprintc): byte arg is unsigned char, not unsigned.

        * src/analyze.c: Assume C89 or better.
        int -> lin for line numbers.
        int -> bool for booleans.
        unsigned int -> size_t for sizes.
        Use angle-brackets when including cmpbuf.h.
        Include error.h, regex.h, xalloc.h.
        (discard_confusing_lines, diff_2_files): Use zalloc rather
        than xalloc+bzero.
        (discard_confusing_lines): unsigned int -> lin for values that
        are really line numbers.
        (shift_boundaries): Do not inhibit hunk merges.
        (build_reverse_script, build_script, diff_2_files): Use |, not ||.
        (diff_2_files): no_details_flag & ~ignore_some_changes ->
        files_can_be_treated_as_binary.  Esure that buffer size is a multiple
        of sizeof (word).  Use file_block_read to read buffers.
        (diff_2_files): Abort if output style is not one of the
        expected styles.

2001-11-23  Paul Eggert  <eggert@twinsun.com>

        * src/Makefile.am, m4/vararrays.m4: New file.

        * m4/prereq.m4 (jm_PREREQ_READUTMP):
        Remove, as it gives autoheader the willies.

        * m4/README, lib/prepargs.h, lib/prepargs.c, lib/offtostr.c,
        lib/umaxtostr.c, lib/inttostr.c, lib/inttostr.h,
        lib/imaxtostr.c, lib/freesoft.h: New files.

        * lib/freesoft.c: Include config.h, freesoft.h rather than diff.h.
        (free_software_msgid): Wrap contents in N_.

        * lib/cmpbuf.h: Use prototypes instead of old-style functions.

        * lib/cmpbuf.c:
        Don't include system.h; instead, include config.h, unistd.h.
        Use prototypes instead of old-style functions.
        (block_read): Don't assume that int is no wider than size_t.

        * lib/Makefile.am, po/POTFILES.in: New file.

2001-11-22  Paul Eggert  <eggert@twinsun.com>

        * pc/config.h:
        Define filename_cmp as an object-like macro, not as a function-like
        macro.

        * exgettext: Always operate in the C locale.
        Set AWK using a method that works even with broken shells.

        * doc/Makefile.am: New file.

        * configure.ac (AC_INIT):
        Use src/diff.c, not diff.h, as the source files got removed.
        (AM_CONFIG_HEADER): Switch from AC_CONFIG_HEADER.
        (AC_ARG_PROGRAM, AC_MINIX): Remove.

        (AC_PREREQ, AM_INIT_AUTOMAKE, ALL_LINGUAS, AC_PROG_AWK,
        AM_PROG_CC_STDC, AC_PROG_RANLIB, AC_C_INLINE, AC_C_VARARRAYS,
        DEFAULT_DIFF_PROGRAM, DEFAULT_EDITOR_PROGRAM,
        AC_STRUCT_ST_MTIM_NSEC): Add.

        (PR_PROGRAM): AC_DEFINE.

        (AC_SYS_LARGEFILE): Use instead of our homebrew version.

        (_GNU_SOURCE): Define if not defined.

        (AC_CHECK_HEADERS): Add stdbool.h, unistd.h.
        (AC_CHECK_TYPES): Add ptrdiff_t, uintmax_t.
        (AM_GNU_GETTEXT, XGETTEXT): Add.

        (WITH_MVFS_STAT_BUG, WITH_NFS_STAT_BUG): Remove.
        (HAVE_MEMCHR): Remove.
        (AC_CHECK_FUNCS): Add diraccess.
        (AC_REPLACE_FUNCS): Add memchr, waitpid.
        (jm_FUNC_GLIBC_UNLOCKED_IO, jm_FUNC_GNU_STRFTIME, jm_FUNC_MALLOC,
         jm_FUNC_REALLOC, jm_PREREQ_ERROR, jm_PREREQ_QUOTEARG, jm_PREREQ_REGEX,
         jm_PREREQ_TEMPNAME, jm_AC_PREREQ_XSTRTOUMAX, AC_FUNC_FNMATCH): Add.
        (fnmatch.h, regex.h): Do not create these files unless we're using
        our own fnmatch and regex.

        (AC_OUTPUT): Add doc/Makefile, intl/Makefile, lib/Makefile,
        lib/posix/Makefile, m4/Makefile, po/Makefile.in, src/Makefile.

        * Makefile.am: New file.

        * po/en_GB.po: Don't translate "program" to "programme".

2001-11-20  Paul Eggert  <eggert@twinsun.com>

        * m4/prereq.m4: New file.

2001-03-16  Paul Eggert  <eggert@twinsun.com>

        * lib/tempname.c (uint64_t):
        Define if not defined, and if UINT64_MAX is not defined.

2001-02-26  Paul Eggert  <eggert@twinsun.com>

        * lib/tempname.c: glibc 1.32

2001-02-17  Paul Eggert  <eggert@twinsun.com>

        * m4/Makefile.am.in: GNU fileutils 4.1

2001-01-09  Paul Eggert  <eggert@twinsun.com>

        * lib/tempname.c (struct_stat64): New macro.
        (direxists, __gen_tempname): Use it.  This avoids a portability problem
        with Solaris 8.

        * lib/tempname.c (<config.h>): Include if HAVE_CONFIG_H.
        (<stddef.h>, <stdint.h>, <string.h>):
        Include only if STDC_HEADERS || _LIBC.
        (<fcntl.h>): Include only if HAVE_FCNTL_H || _LIBC.
        (<unistd.h>): Include only if HAVE_UNISTD_H || _LIBC.
        (<sys/time.h>): Include only if HAVE_SYS_TIME_H || _LIBC.
        (__set_errno): Define this macro if <errno.h> doesn't.
        (P_tmpdir, TMP_MAX, __GT_FILE, __GT_BIGFILE, __GT_DIR, __GT_NOCREATE):
        Define these macros if <stdio.h> doesn't.
        (S_ISDIR, S_IRUSR, S_IWUSR, S_IXUSR):
        Define these macros if <sys/stat.h>
        doesn't.  Ignore <sys/stat.h> S_ISDIR if STAT_MACROS_BROKEN.
        (stat64, __getpid, __gettimeofday, __mkdir, __open, __open64, lxstat64,
        __xstat64): Define if not _LIBC.
        (__secure_getenv): Define if ! (HAVE___SECURE_GETENV || _LIBC).
        (__gen_tempname): Invoke gettimeofday only if HAVE_GETTIMEOFDAY
        || _LIBC; otherwise, fall back on plain "time".
        Use macros like S_IRUSR | S_IWUSR rather than octal values like 0600.

        * lib/mkstemp.c (__GT_FILE): Define to zero if not defined.

2000-10-25  Paul Eggert  <eggert@twinsun.com>

        * lib/hard-locale.c: New file.

2000-02-05  Paul Eggert  <eggert@twinsun.com>

        * exgettext: From GCC repository

1999-07-06  Paul Eggert  <eggert@twinsun.com>

        * lib/mkstemp.c: glibc 2.2

1998-12-11  Paul Eggert  <eggert@twinsun.com>

        * src/sdiff.c (lf_snarf):
        Fix bug when help line wrapped around the input buffer.

1998-09-15  Paul Eggert  <eggert@twinsun.com>

        * diff.texi: Add @dircategory and @direntry.

1998-09-14  Paul Eggert  <eggert@twinsun.com>

        * Makefile.in (VERSION): Version 2.7.2.
        (DEFAULT_DIFF_PROGRAM): Renamed from DIFF_PROGRAM.
        (PR_PROGRAM): All `configure' to define it.
        (srcs): Add $(diffutils_srcs), freesoft.c, quotearg.c instead of
        quote.c, quotearg.h.
        (distfiles): Add acconfig.h, message/*.
        (all): Depend on $(destfiles), not info.
        (version.c): Parenthesize `GNU diffutils'.
        (common_o): Add freesoft.o
        (diff_o): quote.o -> quotearg.o
        (diff3_o, sdiff_o): Likewise.
        (diff.dvi): Depend on version.texi.
        (diff.o diff3.o quotearg.o sdiff.o util.o):
        New dependency on quotearg.h
        (diff3.o): DIFF_PROGRAM -> DEFAULT_DIFF_PROGRAM.
        (sdiff.o): Likewise.
        (messages.po): Remove.
        (message/msgid.po, message/template.po): New rules.
        (maintainer-clean): Renamed from realclean.
        (install): Install from source directory, if applicable.
        Invoke install-info if needed.
        (install-strip): New rule.
        (check): Set DIFF.
        (stamp-h.in): Don't put the date into the timestamp.
        (D_dirs): Add $D/message.
        ($D.tar.gz): Compress with gzip -9.
        Don't use ln to create distribution; it doesn't work with symlinks.
        (srcs, distfiles, diff_o, diff3_o, sdiff_o): Rename quotearg.c to
        quotesys.c and quotearg.h to quotesys.h.

        * configure.in (AC_PATH_PROG): Add PR_PROGRAM.
        If available, prefer support for large files unless the user specified
        one of the CPPFLAGS, LDFLAGS, or LIBS variables.
        (AC_STRUCT_ST_RDEV): Add.
        (HAVE_ST_FSTYPE_STRING): Add.
        (--with-mvfs-stat-bug, --with-nfs-stat-bug): New options.
        (HAVE_MEMCHR): New macro.
        (AC_CHECK_FUNCS): Add sicprocmask.

        * diff.h (XTERN): Renamed from EXTERN.
        (struct filedata): Remove dir_p arg.
        (struct comparison): New type.
        (diff_2_files, diff_dirs)" Ise ot/
        (error): Add printf attribute if applicable.
        (free_software_msgid): New decl.
        (pr_program): New decl.
        (fatal): Add noreturn attribute.
        (pfatal_with_name): Likewise.

        * system.h (__attribute__): New macro.
        (getenv): Don't declare if HAVE_STDLIB_H.
        (CHAR_MAX): New macro.
        (<locale.h>): New include.
        (<locale.h>): Include before <libintl.h>.
        (could_be_mvfs_stat_bug, could_be_nfs_stat_bug,
        dev_may_have_duplicate_ino, same_special_file): New macros.
        (same_file): Use them.

        * cmp.c (authorship_msgid): New var.
        (free_software_msgid): New decl.
        (error): Now has printf attribute.
        (try_help): Likewise.
        (long_options): Don't assume ASCII.
        (try_help): Now accepts operand arg.
        (main): Check for -1, not EOF, when calling getopt_long.
        Report --ignore-initial value when complaining about it.
        Output copyright and free software info with -v.
        Don't assume ASCII.
        Report last operand when one is missing.
        Report text of extra operand.
        Move block_read into cmpbuf.c.

        * diff.c (authorship_msgid): New var.
        (quotesys.h): Include.
        (ck_atoi): Remove.
        (function_regexp_list, ignore_regexp_list): Now static.
        (binary_flag): Renamed from binary_I_O.
        (entire_new_file_flag, unidirectional_new_file_flag,
        print_file_same_flag): Now static.
        (numeric_arg): Renamed from ck_atoi.
        New argument specifying the argument type.
        (longopts, main): Don't assume ASCII.
        (longopts): Remove old aliases --file-label, --entire-new-file,
        --ascii, --print.
        (main): Check for -1, not EOF, when calling getopt_long.
        Use numeric_arg to report errors.
        Report error if -l specified but pagination is not supported.
        Report error if -S is specified twice with conflicting values.
        Have --version conform to the new GNU standards.
        Add new --from-file, --to-file, --inhibit-hun,-merge options.
        Make the horizon at least as large as the context.
        Add casts to pacify gcc -Wall.
        (try_help): Add operand arg.
        (option_help_msgid): Doc fix to match above.
        (usage): Indent option_help_msgid.
        (compare_files): Now takes struct comparison
        instead of two directory names and a depth.
        (NONEXISTENT, UNOPENED, ERRNO_ENCODE, ERRNO_DECODE):
        New macros.
        (DIR_P): New macro.
        Report error if fflush does.

        * cmpbuf.c (block_read): Moved here from cmp.c.

        * cmpbuf.h (block_read): New decl.

        * io.c (cmpbuf.h): Include.
        (slurp): Check for arithmetic overflow when computing buffer size.

        * dir.c (diff_dirs): Check for recursive directory loop.
        Arg is now struct comparison const *.
        (dir_loop): New function

        * analyze.c (no_discards): Remove.
        (inhibit): Remove.
        (shift_boundaries): Don't inhibit.  If inhibit_hunk_merge is nonzero,
        don't merge hunks.
        (briefly_report): Now returns 2 if trouble, CHANGES otherwise.
        (diff_2_files): Now takes struct comparison.  If briefly_report reports
        trouble, pass it on to caller.

        * side.c (print_half_line): Add brackets to pacify GCC -Wall.

        * sdiff.c (quotesys.h): Include.
        (DIFF_PROGRAM, DEFAULT_EDITOR_PROGRAM): Remove.
        (free_software_msgid, editor_program, not_found): New vars.
        (diffbin, edbin): Remove.
        (editor_program): Renamed from edbin.
        (edit, interact): Now take extra string arg.
        (exiterr, fatal, perror_fatal, try_help): Add noreturn attribute.
        (sigset_t, sigemptyset, sigmask, sigaddset, SIG_BLOCK, SIG_SETMASK):
        (sigprocmask): New macros, if !HAVE_SIGPROCMASK.
        (error): Now has printf attribute.
        (longopts, main): Don't assume ASCII.
        (try_help): New operand arg.
        (usage): Conform to new GNU standards.
        (main): Set static vars for editor and diff program.
        Compare getopt_long result to -1, not EOF.
        -v conforms to new GNU standard.
        Complain better about extra and missing operands.
        If HAVE_VFORK, block SIGINT and SIGPIPE in the parent, since when
        the child munges its handlers it may somp on the parent.
        Pass rname to intract.
        Translate not-found message before forking.
        (give_help): Just output it all at once.
        (edit): New args lname, lline, rname, rline.
        (edit): New command 'd'.
        (interact): New args lname, rname.

        * util.c (quotesys.h): Include.
        (PR_PROGRAM): New macro.
        (pfatal_with_name): Abort if error returns.
        (fatal): Likewise.
        (print_message_queue): Free message chain after printing.
        (currently_recursive): Renamed from current_depth, and now a boolean.
        (begin_output): Report error if fflush does.
        Avoid stdio and gettext in child.

        * diff3.c (quotesys.h): Include.
        (free_software_msgid): New decl.
        (RANGE_START, RANGE_END): Renamed from START and END.
        (fatal, perror_with_exit, try_help): Add noreturn attribute.
        (error): Add printf attribute.
        (diff_program): Now a ptr, not an array.
        Initialize to DEFAULT_DIFF_PROGRAM instead of DIFF_PROGRAM.
        (longopts, main): Don't assume ASCII.
        (main): Use DIFF environment var to specify name of diff program.
        Compare getopt_long result to -1, not EOF.
        -v now reports version according to new GNU standard.
        Report spelling of extra operand, or last operand before missing one.
        (try_help): Now takes operand arg.
        (option_help_ms): Fix typo: missing comma.
        (usage): Update as per current GNU standards.
        (environ): Remove decl.
        (read_diff): Invoke diff with --inhibit-hunk-merge.
        Translate `not found' message before forking.
        Quote name of diff program.
        Pass horizon lines.
        `memory exhausted' -> `Memory exhausted'

        * pc/makefile (%.exe): Remove.
        (pc-clean): Remove *.exe
        * pc/makefile.sed (DEFAULT_DIFF_PROGRAM): Renamed from DIFF_PROGRAM.
        When editing mkinstalldirs rule, look for exec_prefix and prefix.
        Add .exe when installing files.
        * pc/emx/config.h (same_file): Add.
        * pc/config.h (same_file): Remove.
        * pc/djgpp/config.h: Adjust to latest patch from eliz.
        * pc/djgpp/makefile.sed: Don't alter PROGRAMS.
        * pc/pc.c: Update FSF address.
        (quote_system_arg): Renamed from system_quote_arg.

        * README: Add --with-mvfs-stat-bug, --with-nfs-stat-bug.

        * getmsgids: Add copyright date and update FSF address.

        * diff.texi: Document recent changes.
        The patch doc still corresponds to patch 2.2, unfortunately.
        Update GNU bug reporting address.  Omit Larry Wall's address;
        it's obsolete and he's busy with perl.

        * context.c: Fix spacing.

        * NEWS: Mention --from-file=FILE, --to-file=FILE, ed.

        * acconfig.h, freesoft.c, message/de.po, message/en_UK.po,
        message/es.po, message/fr.po, message/pl.po, message/sv.po:
        New files.

        * ed.c: Remove `#if 0'ed code.

        * normal.c, waitpid.c: Update FSF address.

1998-03-15  Paul Eggert  <eggert@twinsun.com>

        * quotesys.c: Renamed from quotearg.c.

        * quotesys.h: Renamed from quotearg.h
        (__QUOTESYS_P): Renamed from __QUOTEARG_P.

1997-05-05  Paul Eggert  <eggert@twinsun.com>

        * quotesys.c, quotesys.h: New file.

Mon Nov 14 05:10:56 1994  Paul Eggert  <eggert@twinsun.com>

        Add internationalization support.
        Several messages have been changed slightly,
        to make them more consistent and easier to translate.
        All strings that are messages are passed through gettext once before
        being used, so that they can be localized.
        Each function and macro whose first parameter is a gettext msgid
        has had its first parameter's name changed so it ends in `msgid'.
        All arrays of msgids have had their names changed to end in `msgid'.
        `getmsgids' uses this to determine which strings are msgids.

        * pc/COPYING, pc/INSTALL, pc/config.h,
        pc/djgpp/config.h, pc/djgpp/makefile.sed,
        pc/emx/config.h, pc/emx/diff.def, pc/emx/gnuregex.def,
        pc/emx/makefile.sed,
        pc/makefile, pc/makefile.sed, pc/pc.c: New files, for PC support.

        * getmsgids: New file.

        * Makefile.in (PACKAGE, VERSION, diffutils_srcs, D): New vars.
        (version.c, version.texi, messages.po): New files.
        messages.po is built automatically from source files and `getmsgids'.
        (distfiles): Add them, pc/*, and getmsgids.
        (diff.info): Now depends on version.texi.
        (realclean): Clean messages.po, version.*.
        (dist): Just build $D.tar.gz.
        ($D.tar.gz): New file, takes over old `dist' function.
        Don't assume $(distfiles) are all in same directory.

        * configure.in (AC_CHECK_HEADERS): Add libintl.h, locale.h.
        (AC_CHECK_LIB): Check for -lintl.

        * analyze.c (briefly_report): Rewrite `message (A?"B":"C")' as
        `if (A) message ("B") : message ("C")'; this is for getmsgids.
        (briefly_report, diff_2_files): For label, use file_label if set.
        * diff.c (compare_files): Likewise.

        * system.h (gettext): Declare; use a stub if ! HAVE_LIBINTL_H.
        (setlocale): Declare; use a stub if ! HAVE_LOCALE_H.

        * cmp.c, diff.c, diff3.c, sdiff.c (main):
        Invoke setlocale first thing, to tell library we're internationalized.
        (option_help_msgid): New constant.
        (usage): Use it, so message is translated one option at a time.
        * sdiff (help_msgid, give_help): Likewise.

        * cmp.c (sprintc): Renamed from `printc'.
        Now outputs to a buffer instead of stdout.
        (cmp): Use new sprintc; it's easier to internationalize.

        * diff.c (main): -D FOO now outputs `/* ! FOO */ instead of
        `/* not FOO */'.

        * sdiff.c (version_string): Fix decl typo: `const' was missing.
        (trapsigs): Ignore sigaction failure, to be compatible with `signal'.

        * util.c (struct msg, message5, print_message_queue):
        Allocate just one block of memory to save a message.

Wed Nov  9 17:42:44 1994  Paul Eggert  <eggert@twinsun.com>

        * sdiff.c (trapsigs): Don't check signal return value, since it's
        bogus under djgpp.

Mon Oct 31 07:27:27 1994  Paul Eggert  <eggert@twinsun.com>

        * Makefile.in (srcs, diff_o, diff3_o, sdiff_o):
        New files quote.c, quote.o.

        * diff.h (function_regexp, ignore_regexp): Replace lists of compiled
        regexps with these single compiled regexps.  All users changed.
        (regexp_list,function_regexp_list,ignore_regexp_list): Move to diff.c.
        * diff.c (add_regexp): Build one big regexp instead of a regexp list.
        (summarize_regexp_list): New function.
        (regexp_list): Redesigned struct; moved here from diff.h.
        (function_regexp_list, ignore_regexp_list): Likewise, for vars.

        * context.c (find_function): Simplify interface:
        don't return size of function line.  All callers changed.
        (print_context_script, find_function): INT_MAX now denotes no
        previous match; this is simpler than `- file->prefix_lines - 1'.

        * diff3.c (read_diff): Quote arguments with system_quote_arg.
        * sdiff.c (main): Use system_quote_arg to compute command.
        * diff.c (option_list): Quote options with system_quote_arg.
        * util.c (begin_output): Use system_quote_arg to compute command.

        * util.c (pr_program): New var.
        (analyze_hunk): Fix off-by-1 line length bug.
        Match with one big regexp instead of a list of regexps.
        Use new `trivial_length' local instead of comparing first byte to `\n'.
        Help the compiler with linbuf local vars.

        * system.h (system_quote_arg):
        New function; replaces SYSTEM_QUOTE_ARG macro.

Sat Oct 15 20:09:12 1994  Paul Eggert  <eggert@twinsun.com>

        * system.h (_tolower): Define if not already defined.
        * io.c (find_and_hash_each_line): Change tolower to _tolower; this
        speeds up diff -i considerably on some hosts (e.g. Solaris 2.3).
        * util.c (line_cmp): Likewise.
        * ifdef.c (groups_letter_value): Likewise.

        * diff.h (ignore_some_line_changes): Remove.  All users changed.
        * io.c (find_and_hash_each_line): Don't invoke line_cmp if the length
        differs and -i is in force.  Don't assume ISSPACE ('\n') is nonzero.

        * diff.h (xmalloc_exit_failure): New variable.
        All `main' programs set this variable at the start.
        xmalloc and xrealloc are now taken from GNU library.
        * cmp.c (main): Align buffer size to word size; some mallocs care.
        * io.c (slurp): Likewise.
        * diff.c (add_exclude): Can now assume xrealloc (0, ...) works.
        (add_regexp): Free storage on failure.  Allocate storage all at one go.
        * system.h (malloc, realloc): Remove unused declarations.
        * diff3.c, sdiff.c, util.c (xmalloc, xrealloc): Remove.
        * sdiff.c (diffarg): Take advantage of cleaner xrealloc semantics.

        * io.c (ROL): Use sizeof to make it more generic.

        * Makefile.in (common_o): New variable.
        Link error.o and xmalloc.o into all programs.
        (check): Depend on $(PROGRAMS).

        * diff.h (error): Change to GNU library standard.  All callers changed.
        * diff3.c (main): Use strerror (EISDIR) instead of "Is a directory".
        (fatal, perror_with_exit): Use `error'.
        * util.c (perror_with_name, fatal): Use GNU `error'.
        (error): Remove.

Wed Oct 12 17:04:40 1994  David J. MacKenzie  (djm@duality.gnu.ai.mit.edu)

        * cmp.c (main): Set xmalloc_exit_failure.

Sat Oct  1 05:24:19 1994  Paul Eggert  <eggert@twinsun.com>

        * Version 2.7 released.

        * configure.in (AC_HEADER_SYS_WAIT): Add.
        (AC_CHECK_HEADERS): Remove sys/wait.h.
        (AC_CHECK_FUNCS): Add tmpnam.
        * system.h (<sys/wait.h>, WEXITSTATUS): Use simpler scheme
        now that HAVE_SYS_WAIT_H is not set on hosts
        that are incompatible with Posix applications.

        * util.c (dir_file_pathname): Use filename_lastdirchar not strrchr.
        * sdiff.c (expand_name): Likewise.
        (private_tempnam): Use tmpnam if HAVE_TMPNAM; this simplifies porting.
        (exists, letters): Omit if HAVE_TMPNAM.

        * diff3.c (read_diff): If STAT_BLOCKSIZE yields zero,
        adjust it to a more reasonable value.

Sat Sep 24 20:36:40 1994  Paul Eggert  <eggert@twinsun.com>

        * sdiff.c (exists, private_tempname): Adopt latest GNU libc algorithm.
        (private_tempnam): Specialize for sdiff to avoid portability problems.

Thu Sep 22 16:47:00 1994  Paul Eggert  <eggert@twinsun.com>

        * configure.in (AC_ARG_PROGRAM): Added.
        (AC_OUTPUT): Add [date > stamp-h].

        * Makefile.in (DEFAULT_EDITOR_PROGRAM, DIFF_PROGRAM, LIBOBJS,
        NULL_DEVICE, PR_PROGRAM, PROGRAMS): New variables.
        (check, stamp-h.in, cmp.o, util.o): New targets.
        (edit_program_name): New variable; replaces old binprefix method.
        (install, uninstall): Use it.
        (binprefix): Removed.
        (distfiles): Add stamp-h.in.
        (clean): Clean stamp-h.
        (config.hin, config.h): Use time stamp files.
        (cmp_o): Add $(LIBOBJS).
        (install): Install info files from srcdir if they're not in `.'.

        * cmp.c, io.c (word): Don't define if already defined.

        * comp.c (main): Use setmode, not open(..., O_BINARY); this gets stdin.
        Use NULL_DEVICE instead of "/dev/null".
        (cmp): Use %lu instead of %ld when it is more likely to be right.

        * diff.h (PR_FILE_NAME): Rename to PR_PROGRAM and move to Makefile.in,
        util.c.

        * diff3.c (main): Give proper diagnostic if too many labels were given.
        (read_diff): Use SYSTEM_QUOTE_ARG.

        * system.h: <string.h>: Include if HAVE_STRING_H, too.
        <ctype.h>: Include here.  All includers changed.
        (CTYPE_DOMAIN, ISDIGIT, ISPRINT, ISSPACE, ISUPPER): New macros that
        work around common <ctype.h> problems.
        (O_BINARY): Remove.
        (SYSTEM_QUOTE_ARG): New macros.

        * diff.c: Add comment.

        * util.c (PR_PROGRAM): Moved here from diff.h.
        (begin_output): Use SYSTEM_QUOTE_ARG.

        * io.c (read_files): Set mode to binary before returning 1.

        * sdiff.c (TMPDIR_ENV): New macro.
        (DEFAULT_EDITOR_PROGRAM): Renamed from DEFAULT_EDITOR for consistency.
        (expand_name): Change `isdir' to `is_dir' to avoid theoretical ctype
        namespace contamination.
        (main): Use SYSTEM_QUOTE_ARG.
        (private_tempnam): Don't access "/tmp" directly; use PVT_tmpdir.

Tue Sep 13 18:46:43 1994  Paul Eggert  <eggert@twinsun.com>

        * configure.in (AC_FUNC_MEMCHR): Remove.  Autoconf didn't adopt this,
        since we need not worry about an old experimental library
        where memchr didn't work.
        (AC_FUNC_MEMCMP): Not needed, since we only test for equality.
        (AC_REPLACE_FUNCS): Add test for memchr.
        (AC_CHECK_FUNCS): Check for memchr, not memcpy, since it'll be cached.
        (AC_CHECK_HEADERS): Add string.h; regex.c uses on some old hosts.

        * system.h (memcmp): Define in terms of bcmp.
        Use HAVE_MEMCHR to test for all mem* routines.

        * Makefile.in (srcs): Remove memcmp.c.
        We use bcmp if memcmp doesn't work, since we only test for equality.

Mon Sep 12 15:52:22 1994  Paul Eggert  <eggert@twinsun.com>

        * configure.in (AC_CONFIG_HEADER): Rename config.h.in to config.hin.
        (AC_ISC_POSIX, AC_MINIX): Go back to these old names for Autoconf 2.
        (AC_CHECK_HEADERS): Remove now-redundant check for <string.h>.
        (AC_CHECK_FUNCS): Check for strchr.
        (AC_FUNC_MEMCHR, AC_FUNC_MEMCMP, AC_CHECK_FUNCS): Use special-purpose
        macros when suitable.
        * memcmp.c: New file.
        * Makefile.in (CPPFLAGS, DEFS, CFLAGS, LDFLAGS, prefix, exec_prefix):
        Default to autoconf-specified strings.
        (COMPILE): Use the defaults.
        (srcs): Add memcmp.c.
        (distfiles): Rename config.h.in->config.hin, install.sh->install-sh.
        (Makefile, config.h, config.hin, config.status): Rework for
        compatibility with Autoconf 2.
        * io.c (binary_file_p): Assume non-broken memchr.
        * memchr.c: Assume compiler understands void *; otherwise
        we don't match GCC's internal declaration of memchr.
        * system.h: Use more modern autoconf approach to standard C headers.
        * version.c: Include <config.h>, not "config.h".

        * diff.c, diff.h (ignore_some_line_changes):
        New variable; replaces `length_varies'.
        (line_end_char): Replace with '\n'; it wasn't being used consistently.

        * io.c (find_and_hash_each_line): Fix inconsistencies with -b -w -i and
        incomplete lines.  Put incomplete lines into their own bucket.
        This means line_cmp no longer needs line length arguments,
        and equivalence classes' line lengths no longer need to include \n.
        Invoke line_cmp only if ignore_some_line_changes.
        (prepare_text_end): -B no longer ignores missing newlines.
        (read_files): Allocate another bucket for incomplete lines.

        * util.c (line_cmp): Now takes just two arguments.  No longer
        optimizes for common case of exact equality; the caller does that
        optimization now.  The caller is changed accordingly.
        Optimize for the common case of mostly equality.
        Use isupper+tolower instead of islower+toupper, for consistency.

        * waitpid.c (waitpid): Fix typo with internal scoping.

Thu Sep  8 08:23:15 1994  Paul Eggert  <eggert@twinsun.com>

        * configure.in: Revamp for Autoconf 2.
        * memchr.c, waitpid.c: New source files for substitute functions.
        * Makefile.in (diff_o, diff3_o, sdiff_o): Add $(LIBOBJS).
        (srcs): Add memchr.c, waitpid.c.
        (distfiles): Add install.sh, memchr.c, waitpid.c, install.sh.
        * system.h: Use Autoconf 2 style HAVE_DIRENT_H etc. macros for dirs.
        * dir.c (dir_sort): Prefer NAMLEN (p) to strlen (p->d_name).
        Change VOID_CLOSEDIR to CLOSEDIR_VOID for Autoconf 2.
        * sdiff.c, util.c (memchr, waitpid): Remove; use new substitutes.
        * diff3.c (read_diff): Use new waitpid substitute.

        * cmp.c, diff.c, diff3.c, sdiff.c (check_stdout, try_help): New fns.
        (usage): Just print more detailed usage message; let caller exit.
        * diff.c (option_help): New variable.
        (filetype): Add Posix.1b file types.

Fri Sep  2 16:01:49 1994  Paul Eggert  <eggert@twinsun.com>

        * configure.in: Switch to new autoconf names.  Add sys/file.h test.
        * Makefile.in (distclean): Clean config.cache, config.log
        (used by new autoconf).

        * diff.c, diff3.c, (main), sdiff.c (trapsigs): If we'll have children,
        make sure SIGCHLD isn't ignored.

        * diff3.c (DIFF_CHUNK_SIZE): Removed.  Get size from STAT_BLOCKSIZE.
        (INT_STRLEN_BOUND): New macro.

        * ifdef.c (format_group, groups_letter_value):
        Use * instead of [] in prototypes.

        * system.h: Include <sys/file.h> only if HAVE_SYS_FILE_H.
        (S_IXGRP, S_IXOTH, S_IXUSR): Remove unused macros.

        * util.c (begin_output): Check fdopen result.

        The following changes simplify porting to non-Posix environments.
        * cmp.c, diff.c, diff3.c, sdiff.c, (main): Call initialize_main first.
        * diff.c (binary_I_O): New variable for --binary option.
        (main, usage, compare_files): Support --binary option.
        (compare_files): Use filename_lastdirchar to find last
        directory char in a file name.
        * cmp.c (main), diff.c (compare_files), dir.c (compare_names,
        diff_dirs): Use filename_cmp to compare file names.
        Use same_file to determine whether two files are the same.
        * context.c (print_context_label): Check whether ctime yields 0.
        * diff3.c (read_diff), sdiff.c (cleanup, main, waitpid),
        util.c (begin_output): Use popen+pclose if !HAVE_FORK.
        * io.c (sip): If HAVE_SETMODE, test for binary files in O_BINARY mode.
        * sdiff.c (ck_fdopen): Function removed.
        (edit): Use system if !HAVE_FORK.
        (execdiff): Now assumes caller has pushed all args, plus trailing 0.
        All callers changed.
        (private_tempnam): Try TMP if TMPDIR isn't defined.
        Fit temporary filenames into 8.3 limit.
        * system.h (STAT_BLOCKSIZE): Don't define if already defined.
        (min, max): Undef if already defined.
        (filename_cmp, filename_lastdirchar, HAVE_FORK, HAVE_SETMODE,
        initialize_main, O_BINARY, same_file): New macros.

Fri Jun 17 11:23:53 1994  David J. MacKenzie  (djm@geech.gnu.ai.mit.edu)

        * Makefile.in (info, dvi, diff.dvi): New targets.
        (clean): Remove TeX output files.

Fri Jun 17 05:37:52 1994  Paul Eggert  (eggert@twinsun.com)

        * cmp.c, io.c (word): Change from typedef to #define, to avoid
        collision with Unicos 8.0 <sys/types.h>, which also typedefs `word'.

Thu Apr 15 00:53:01 1994  Paul Eggert  (eggert@twinsun.com)

        * diff3.c (scan_diff_line), util.c (print_number_range): Don't
        rely on promotion to make the old-style parameter type agree
        with the prototype parameter type; this doesn't work on
        Apollos running bsd4.3.

Mon Jan  3 02:05:51 1994  Paul Eggert  (eggert@twinsun.com)

        * Makefile.in (LDFLAGS): Remove -g.  Change all link commands
        to use both $(CFLAGS) and $(LDFLAGS).

Mon Dec 13 12:23:27 1993  Paul Eggert  (eggert@twinsun.com)

        * system.h: Don't assume dirent.h exists just because
        _POSIX_VERSION is defined.

Fri Dec  3 18:39:39 1993  Paul Eggert  (eggert@twinsun.com)

        * diff.c (main): allow -pu.

Tue Nov 23 03:51:08 1993  Paul Eggert  (eggert@twinsun.com)

        * Makefile.in (distclean): Remove config.h.

Wed Nov 10 00:28:27 1993  Paul Eggert  (eggert@twinsun.com)

        * Version 2.6 released.

        * analyze.c (too_expensive): New variable, for heuristic to
        limit the worst-case cost to O(N**1.5 log N) at the price of
        producing suboptimal output for large inputs with many differences.
        (diff_2_files): Initialize it.
        (struct partition): New type.
        (SNAKE_LIMIT): New macro; merely documents already-used number 20.
        (diag): New `minimal' arg; all callers changed.  Put results into
        struct partition.  Apply `too_expensive' heuristic.  Tune.
        (compareseq): New `minimal' arg; all callers changed.  Tune.
        (shift_boundaries): Improve heuristic to also coalesce adjacent runs
        of changes more often.

        * diff.c (long_options, main, usage): Add `--help'.
        (main): Send version number to stdout, not stderr.
        (usage): Send usage to stdout, not stderr.
        (compare_files): Initialize `inf' properly.

        * io.c (word): Change to `int'; it makes a big difference on x86.
        (sip, slurp): Put off allocating room to hold the whole file until we
        have to read the whole file.  This wins if the file turns out
        to be binary.

        * util.c (xmalloc, xrealloc): "virtual memory" -> "memory"
        (primes): Omit large primes if INT_MAX is small.

        * sdiff.c (usage): Send usage to stdout, not stderr.
        (long_options, main, usage): Add `--help'.
        (main): Send version number to stdout, not stderr.  Exit afterwards.

        * diff3.c (usage): Send usage to stdout, not stderr.
        (long_options, main, usage): Add `--help'.
        (read_diff): Detect integer overflow in buffer size calculations.

        * cmp.c (word): New type.  All uses of `long' for
        word-at-a-time comparisons changed to `word'.
        (long_options, main, usage): Add `--help'.
        (usage): Send usage to stdout, not stderr.
        (main): Add `-v'.  Send version number to stdout, not stderr.

        * configure.in (AC_HAVE_HEADERS): Add unistd.h; remove AC_UNISTD_H.

Mon Sep 27 07:20:24 1993  Paul Eggert  (eggert@twinsun.com)

        * diff.c (add_exclude_file): Cast memchr to (char *)
        to suppress bogus warnings on some nonstandard hosts.

        * Makefile.in (cmp): Add version.o.

        * analyze.c (diff_2_files): Work around memcmp bug with size=0.

        * cmp.c (main, usage, version_string): Add --version option.

        * system.h (malloc, realloc): Declare only if !HAVE_STDLIB_H.
        (memchr): Declare only if !HAVE_MEMCHR.  These changes are
        needed to keep some nonstandard hosts happy.

        * util.c (memchr): Make first arg char const *
        to match standard.
        (xmalloc, xrealloc): Cast malloc, realloc
        to (VOID *) to suppress bogus warnings on some nonstandard hosts.

        * diff3.c (xmalloc, xrealloc): Cast malloc, realloc
        to (VOID *) to suppress bogus warnings on some nonstandard hosts.

        * sdiff.c (xmalloc, xrealloc): Cast malloc, realloc
        to (VOID *) to suppress bogus warnings on some nonstandard hosts.
        (lf_copy, lf_skip, lf_snarf): Cast memchr to (char *)
        to suppress bogus warnings on some nonstandard hosts.
        (memchr): Make first arg char const *
        to match standard.

Mon Sep 27 00:23:37 1993  Paul Eggert  (eggert@twinsun.com)

        * Version 2.5 released.

        * analyze.c (diff_2_files): Work around memcmp bug with size=0.

        * cmp.c (main, usage, version_string): Add --version option.
        * Makefile.in (cmp): Add version.o.

        * diff.c (add_exclude_file): Cast memchr to (char *)
        to suppress bogus warnings on some nonstandard hosts.
        * sdiff.c (lf_copy, lf_skip, lf_snarf): Likewise.

        * diff3.c, sdiff.c, util.c (xmalloc, xrealloc): Cast malloc, realloc
        to (VOID *) to suppress bogus warnings on some nonstandard hosts.

        * sdiff.c, util.c (memchr): Make first arg char const *
        to match standard.

        * system.h (malloc, realloc): Declare only if !HAVE_STDLIB_H.
        (memchr): Declare only if !HAVE_MEMCHR.  These changes are
        needed to keep some nonstandard hosts happy.

        * xmalloc.c: Include <sys/types.h> always; some nonstandard hosts
        need it for size_t even if STDC_HEADERS.

Sat Sep 18 01:33:07 1993  Paul Eggert  (eggert@twinsun.com)

        * configure.in (AC_STAT_MACROS_BROKEN): Add.
        * system.h (S_IS{BLK,CHR,DIR,FIFO,REG,SOCK}): Fix defns if
        STAT_MACROS_BROKEN.

        * Makefile.in (diff3, sdiff, cmp): Do not link $(ALLOCA).

        * analyze.c (discard_confusing_lines): Make defn static, like decl.
        * sdiff.c (xmalloc): Likewise.

        * ifdef.c (format_group): Ensure isdigit argument isn't < 0.

        * side.c (print_half_line): Use isprint, since some hosts lack isgraph.
        * util.c (output_1_line): Likewise.  Ensure its argument isn't < 0.
        (xmalloc, xrealloc): Remove needless casts.

        * system.h (volatile, const):
        Define these before including any system headers,
        so that they're used consistently in all system includes.
        (getenv, malloc, realloc): Declare even if HAVE_STDLIB_H, since some
        <stdlib.h>s don't declare them.
        (memchr): Likewise for <string.h>.

        * cmp.c, diff3.c, diff.h, sdiff.c: Include "system.h" first.
        * diff.c: Remove redundant "system.h" inclusion.

        * diff3.c (xmalloc): Now static.
        (xmalloc, realloc): Remove needless casts.
        (READNUM): Ensure isdigit argument isn't negative.

Wed Sep 14 07:14:15 1993  Paul Eggert  (eggert@twinsun.com)

        * Version 2.4 released.

        * ifdef.c (scan_char_literal): New function, for new %c'x' and
        %c'\ooo' format specs.
        (format_group, print_ifdef_lines): Use it.  Remove %0 format spec.

        * cmp.c (cmp): Don't try to read past end of file; this doesn't
        work on ttys.

        * system.h, version.c: #include <config.h>, not "config.h", to allow
        configuring in a separate directory when the source directory has
        already been configured.
        * Makefile.in (COMPILE): New defn, with proper -I options so that
        `#include <config.h>' works.
        (.c.o, diff3.o, sdiff.o): Use it.

Mon Sep 13 06:45:43 1993  Paul Eggert  (eggert@twinsun.com)

        * diff.c (main, longopts): Add --line-format=FORMAT option.
        (specify_format): Args no longer const pointers.  All callers changed.

        * ifdef.c: Add support for %?c, %(A=B?T:E), PRINTF_SPECn formats.
        (struct group): New struct.
        (print_ifdef_lines): Use it to simplify argument passing.
        Remove the convention that last arg -1 signifies that the lines
        from file 2 are the same as the lines from file 1; this
        convention no longer works, now that line numbers might be
        printed out, since the line numbers may differ.
        Add first FILE * argument to output to.  All callers changed.
        Use a faster test for the single-fwrite optimization.
        (format_group, scan_printf_spec, groups_letter_value): New functions.

        * diff.h (group_format, line_format): No longer const pointers.
        (format_ifdef): 1st arg is no longer const pointer.

        * configure.in: Configure HAVE_LIMITS_H, HAVE_STDLIB_H.
        * system.h <limits.h>, <stdlib.h>, <string.h>:
        Include only if HAVE_LIMITS_H etc.

        * system.h (memcmp, memcpy, strchr, strrchr, struct dirent): Prefer
        these standard names to the traditional names (bcmp, bcpy, index,
        rindex, struct direct).  All callers changed.

        * system.h (PARAMS, VOID):
        Define earlier so that malloc decl can use VOID.
        (STAT_BLOCKSIZE): Simplify ersatz defn; just use 8K.

Fri Sep  3 00:21:02 1993  Paul Eggert  (eggert@twinsun.com)

        * diff.c (compare_files): Two files with the same name must be
        the same file; avoid a needless `stat' in that case.

Fri Aug 27 06:59:03 1993  Paul Eggert  (eggert@twinsun.com)

        * Pervasive changes for portability to 64-bit hosts:
        Add prototypes to function declarations.
        Use size_t, not int, when needed.

        * Other pervasive changes:
        Use `const' more often.
        Use STD{IN,OUT,ERR}_FILENO instead of [012].
        Use 0, not NULL, for portability to broken hosts.

        * Makefile.in: (srcs, objs, distfiles, cmp): New files cmpbuf.[ch].
        (distfiles): New files config.h.in, mkinstalldirs.
        (.c.o): Add -DHAVE_CONFIG_H.

        * analyze.c: (diag): Pacify `gcc -Wall' with a useless assignment.
        (diff_2_files): Use l.c.m., not max, of files' buffer sizes.

        * cmp.c: Make globals static when possible.

        (file): Now a 2-element array; replaces `file1' and `file2'.
        (file_desc, buffer): Likewise, for file[12]_desc and buf[12].
        (main): Likewise, for stat_buf[12].  Index these variables with `i'.

        (ignore_initial): New var.
        (long_options): Now const.  Add `--ignore-initial'.
        (usage): Sort options and add `--ignore-initial'.
        (main, cmp): Add `--ignore-initial' support.

        (main): `cmp - -' now succeeds.
        When comparing standard input to a file, and using a shortcut (e.g.
        looking at file sizes or inode numbers), take the lseek offset into
        account before deciding whether the files are identical.
        Avoid mentioning `dev_t', `ino_t' for portability to nonstandard hosts.
        Use l.c.m. of files' buffer sizes, not 8 * 1024.
        ferror (stdout) does not imply errno has a useful value.
        If 2nd file is "-", treat it first, in case stdin is closed.

        (cmp): Always compute `char_number', `smaller' for speed and simplicity.
        Say `cmp: EOF on input', not `/usr/gnu/bin/cmp: EOF on input',
        as per Posix.2.

        (block_compare_and_count): Increment line_number argument.
        Remove end_char argument; it's always '\n'.  All callers changed.
        Do not assume sizeof(long) == 4; this isn't true on some 64-bit hosts.
        (block_compare): Minimize differences with block_compare_and_count.

        (block_read): Coalesce `bp += nread's.

        (printc): Remove `FILE *' arg; output to stdout.  All callers changed.

        * configure.in: Configure HAVE_SIGACTION, RETSIGTYPE, HAVE_VPRINTF.
        Configure into config.h.

        * context.c (print_context_label):
        Standard input's st_mtime is no longer a special case
        here, since `compare_files' now sets it to the current time.

        * diff.c (usage): Sort options.
        (filetype): New function.
        (compare_files): Set stdin's st_mtime to be the current time.
        Leave its name "-" instead of changing it to "Standard Input";
        to test whether a file is stdin, we must compare its name to "-" instead
        of its desc to 0, since if it's closed other file descs may be 0.
        When comparing standard input to a file, and using a shortcut (e.g.
        looking at file sizes or inode numbers), take the lseek offset into
        account before deciding whether the files are identical.
        Pretend that nonexistent files have the same filetype as existing files.
        Rename `errorcount' to `failed', since it's boolean.
        In directory comparisons, if a file is neither a regular file nor a
        directory, just print its type and the other file's type.

        * diff.h (Is_space, textchar): Remove.
        (struct msg, msg_chain, msg_chain_end): Move to util.c.
        (VOID): Move to system.h.
        (line_cmp, version_string, change_letter, print_number_range,
        find_change): New decls.

        * diff.texi:
        whitespace -> white space.  It now stands for whatever isspace yields.
        Add --ignore-initial.

        * diff3.c (VOID): Move to system.h.
        (version_string): Now char[].
        (usage): Sort options.
        (process_diff): Pacify `gcc -Wall' with a useless assignment.
        (read_diff): pid is of type pid_t, not int.  Use waitpid if available.
        (output_diff3): Simplify test for `\ No newline at end of file' message.

        * dir.c (struct dirdata): Rename `files' to `names' to avoid confusion
        with external struct file_data `files'.

        * io.c (line_cmp): Move declaration to diff.h.
        (textchar): Remove.
        (find_and_hash_each_line): Use locale's definition of white space
        instead of using one hardwired defn for -b and another for -w.

        * normal.c (change_letter, print_number_range, find_change):
        Move decls to diff.h.
        (print_normal_hunk): Now static.

        * sdiff.c (SEEK_SET): Move to system.h.
        (version_string): Now char[], not char*.
        (private_tempnam): Remove hardcoded limit on temporary file names.
        (exiterr, perror_fatal, main): When exiting because of a signal,
        exit with that signal's status.
        (lf_refill, main, skip_white, edit, interact): Check for signal.
        (ignore_SIGINT): Renamed from `ignore_signals'.
        (NUM_SIGS, initial_handler): New macros.
        (initial_action, signal_received, sigs_trapped): New vars.
        (catchsig, trapsigs): Use sigaction if possible, since this closes the
        windows of vulnerability that `signal' has.  Use RETSIGTYPE not void.
        When a signal comes in, just set a global variable; this is safer.
        (checksigs, untrapsig): New functions.
        (edit): Pacify `gcc -Wall' with a useless assignment.
        Respond to each empty line with help, not to every other empty line.
        (private_tempnam): Remove hardcoded limit on temporary file name length.
        Don't assume sizeof (pid_t) <= sizeof (int).

        * system.h: (S_IXOTH, S_IXGRP, S_IXUSR,
        SEEK_SET, SEEK_CUR,
        STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO):
        New macros, if system doesn't define them.
        (volatile): Don't define if already defined.
        (PARAMS): New macro.
        (VOID): Move here from diff.h.

        * util.c (struct msg, msg_chain, msg_chain_end): Moved here from diff.h.
        (message5): New function.
        (pr_pid): New var.
        (begin_output): Allocate `name' more precisely.
        Put child pid into pr_pid, so that we can wait for it later.
        Don't check execl's return value, since any return must be an error.
        (finish_output): Detect and report output errors.
        Use waitpid if available.  Check pr exit status.
        (line_cmp): Use locale's definition of white space
        instead of using one hardwired defn for -b and another for -w.
        (analyze_cmp): Avoid double negation with `! nontrivial'.
        Pacify `gcc -Wall' be rewriting for-loop into do-while-loop.
        (dir_file_pathname): New function.

        * version.c (version_string): Now char[], not char*.

Thu Jul 29 20:44:30 1993  David J. MacKenzie  (djm@wookumz.gnu.ai.mit.edu)

        * Makefile.in (config.status): Run config.status --recheck, not
        configure, to get the right args passed.

Thu Jul 22 10:46:30 1993  Paul Eggert  (eggert@twinsun.com)

        * Makefile.in (dist): Replace `if [ ! TEST ]; then ACTION; fi'
        with `[ TEST ] || ACTION || exit' so that the containing for-loop exits
        with proper status for `make'.

Thu Jul  8 19:47:22 1993  David J. MacKenzie  (djm@goldman.gnu.ai.mit.edu)

        * Makefile.in (installdirs): New target.
        (install): Use it.
        (Makefile, config.status, configure): New targets.

Sat Jun  5 23:10:40 1993  Paul Eggert  (eggert@twinsun.com)

        * Makefile.in (dist): Switch from .z to .gz.

Wed May 26 17:16:02 1993  Paul Eggert  (eggert@twinsun.com)

        * diff.c (main): Cast args to compare_files, for traditional C.
        * side.c (print_sdiff_common_lines_print_sdiff_hunk): Likewise.
        * analyze.c, diff3.c, sdiff.c, util.c: Don't assume NULL is defined
        properly.

Tue May 25 14:54:05 1993  Paul Eggert  (eggert@twinsun.com)

        * analyze.c (diff_2_files):  With -q, do not report that files differ
        if all their differences are ignored.
        (briefly_report): New function.
        * diff.h (ignore_some_changes): New variable.
        * diff.c (compare_files): Don't use the file size shortcut if
        ignore_some_changes is nonzero, since the file size may differ
        merely due to ignored changes.
        (main):  Set ignore_some_changes if we might ignore some changes.
        Remove unsystematic assignment of 0 to static vars.
        * io.c (read_files): New argument PRETEND_BINARY says whether to
        pretend the files are binary.

        * diff3.c (tab_align_flag): New variable, for new -T option.
        (main, usage, output_diff3): Add support for -T.

Sun May 23 15:25:29 1993  Richard Stallman  (rms@mole.gnu.ai.mit.edu)

        * dir.c (dir_sort): Always init `data' to avoid GCC warning.

Sat May 22 15:35:02 1993  Paul Eggert  (eggert@twinsun.com)

        * Makefile.in (dist): Change name of package from diff to diffutils.
        Don't bother to build .Z dist; .z suffices.

Fri May 21 16:35:22 1993  Paul Eggert  (eggert@twinsun.com)

        * diff.c: Include "system.h" to get memchr declaration.
        * system.h (memchr): Declare if !HAVE_MEMCHR, not if
        !HAVE_MEMCHR && !STDC_HEADERS.

Wed May 19 17:43:55 1993  Paul Eggert  (eggert@twinsun.com)

        * Version 2.3 released.

Fri Apr 23 17:18:44 1993  Paul Eggert  (eggert@twinsun.com)

        * io.c (find_identical_ends): Do not discard the last HORIZON_LINES
        lines of the prefix, or the first HORIZON_LINES lines of the suffix.
        * diff.c (main, longopts, usage): Add --horizon-lines option.
        * diff3.c (main, process_diff, read_diff): Invoke second diff
        with --horizon-lines determined by the first diff.
        * diff.h, diff3.c (horizon_lines): New variable.

Mon Mar 22 16:16:00 1993  Roland McGrath  (roland@churchy.gnu.ai.mit.edu)

        * system.h [HAVE_STRING_H || STDC_HEADERS] (bcopy, bcmp, bzero):
        Don't define if already defined.

Fri Mar  5 00:20:16 1993  Richard Stallman  (rms@mole.gnu.ai.mit.edu)

        * diff.c (main): Use NULL in arg to compare_files.

Thu Feb 25 15:26:01 1993  Roland McGrath  (roland@churchy.gnu.ai.mit.edu)

        * system.h: Declare memchr #if !HAVE_MEMCHR && !STDC_HEADERS,
        not #if !HAVE_MEMCHR || !STDC_HEADERS.

Mon Feb 22 15:04:46 1993  Richard Stallman  (rms@geech.gnu.ai.mit.edu)

        * io.c (find_identical_ends): Move complicated arg outside GUESS_LINES.

Mon Feb 22 12:56:12 1993  Roland McGrath  (roland@churchy.gnu.ai.mit.edu)

        * Makefile.in (.c.o): Add -I$(srcdir); put $(CFLAGS) last before $<.

Sat Feb 20 19:18:56 1993  Richard Stallman  (rms@mole.gnu.ai.mit.edu)

        * io.c (binary_file_p): Return zero if file size is zero.

Fri Feb 19 17:31:32 1993  Roland McGrath  (roland@geech.gnu.ai.mit.edu)

        * Version 2.2 released.

        * system.h [HAVE_STRING_H || STDC_HEADERS] (index, rindex): Don't
        define if already defined.

Wed Feb 17 17:08:00 1993  Roland McGrath  (roland@churchy.gnu.ai.mit.edu)

        * Makefile.in (srcs): Remove limits.h.

Thu Feb 11 03:36:00 1993  Richard Stallman  (rms@mole.gnu.ai.mit.edu)

        * diff3.c (xmalloc): No longer static.

        * sdiff.c (edit): Allocate buf dynamically.

        * dir.c (dir_sort): Handle VOID_CLOSEDIR.

Wed Feb 10 00:15:54 1993  Richard Stallman  (rms@mole.gnu.ai.mit.edu)

        * limits.h: File deleted (should never have been there).

Tue Feb  9 03:53:22 1993  Richard Stallman  (rms@mole.gnu.ai.mit.edu)

        * Makefile.in (.c.o, diff3.o, sdiff.o): Put $(CFLAGS) last.

Wed Feb  3 15:42:10 1993  David J. MacKenzie  (djm@goldman.gnu.ai.mit.edu)

        * system.h: Don't #define const; let configure do it.

Mon Feb  1 02:13:23 1993  Paul Eggert  (eggert@hal.gnu.ai.mit.edu)

        * Version 2.1 released.

        * Makefile.in (dist): Survive ln failures.  Create .tar.z
        (gzipped tar) file as well as .tar.Z (compressed tar) file.

Fri Jan  8 22:31:41 1993  Paul Eggert  (eggert@twinsun.com)

        * side.c (print_half_line): When the input position falls
        outside the column, do not output a tab even if the output
        position still falls within the column.

Mon Dec 21 13:54:36 1992  David J. MacKenzie  (djm@kropotkin.gnu.ai.mit.edu)

        * Makefile.in (.c.o): Add -I.

Fri Dec 18 14:08:20 1992  Paul Eggert  (eggert@twinsun.com)

        * configure.in: Add HAVE_FCNTL_H, since system.h uses it.

Tue Nov 24 10:06:48 1992  David J. MacKenzie  (djm@goldman.gnu.ai.mit.edu)

        * Makefile.in: Note change from USG to HAVE_STRING_H.

Mon Nov 23 18:44:00 1992  Paul Eggert  (eggert@twinsun.com)

        * io.c (find_and_hash_each_line): When running out of lines,
        double the number of allocated lines, instead of just doubling
        that number minus the prefix lines.  This is more likely to
        avoid the need for further memory allocation.

Wed Nov 18 20:40:28 1992  Paul Eggert  (eggert@twinsun.com)

        * dir.c (dir_sort): Plug memory leak: space holding directory
        contents was not being reclaimed.  Get directory size from
        struct file_data for initial guess at memory needed.
        Detect errors when reading and closing directory.
        (diff_dirs): Pass struct file_data to dir_sort.  Finish plugging leak.
        * diff.c (compare_files): Pass struct file_data to diff_dirs.

        * io.c (find_and_hash_each_line): Don't assume alloc_lines is
        nonzero when allocating more lines.

Thu Nov 12 16:02:18 1992  Paul Eggert  (eggert@twinsun.com)

        * diff.c (main): Add `-U lines' as an alias for `--unified=lines'.

        * diff3.c (usage): Add third --label option in example.

        * util.c (analyze_hunk): Fix test for ignoring blank lines.

        * configure.in, system.h: Avoid USG; use HAVE_TIME_H etc. instead.

Mon Nov  9 05:13:25 1992  Paul Eggert  (eggert@twinsun.com)

        * diff3.c (main, usage): Add -A or --show-all.
        -m now defaults to -A, not -E.  Allow up to three -L options.
        (output_diff3_edscript, output_diff3_merge):
        Remove spurious differences between these two functions.
        Output ||||||| for -A.  Distinguish between conflicts and overlaps.
        (dotlines, undotlines): New functions that output `Ns', not `N,Ns'.
        (output_diff3_edscript, output_diff3_merge): Use them.

        * io.c (find_identical_ends): shift_boundaries needs an extra
        identical line at the end, not at the beginning.

        * sdiff.c (edit): execvp wants char **, not const char **.

Mon Oct 19 04:39:32 1992  Paul Eggert  (eggert@twinsun.com)

        * context.c (print_context_script, find_function): Context
        line numbers start with - file->prefix_lines, not 0.

        * io.c (binary_file_p): Undo last change; it was a library bug.

Sun Oct 18 00:17:29 1992  Richard Stallman  (rms@mole.gnu.ai.mit.edu)

        * io.c (binary_file_p): Consider empty file as non-binary.

Mon Oct  5 05:18:46 1992  Paul Eggert  (eggert@twinsun.com)

        * diff3.c (main, make_3way_diff, using_to_diff3_block): Don't
        report bogus differences (for one of -mexEX3) just because the
        file0-file1 diffs don't line up with the file0-file2 diffs.
        (This is entirely possible since we don't use diff's -n
        option.)  Always compare file1 to file2, so that diff3 sees
        those changes directly.  Typically, file2 is now the common
        file, not file0.
        (output_diff3_merge): The input file is file 0, not the common file.

        (FC, FO): New macros; they replace FILE1, FILE0 for two-way diffs,
        to distinguish them from three-way diffs.

        * diff3.c (using_to_diff3_block): Fold repeated code into loops.

        * diff3.c (make_3way_diff, process_diff): Have the *_end
        variable point to the next field to be changed, not to the last
        object allocated; this saves an if-then-else.

        * diff3.c (process_diff): Use D_NUMLINES instead of its definiens.

        * diff3.c: Make fns and vars static unless they must be external.

Wed Sep 30 09:21:59 1992  Paul Eggert  (eggert@twinsun.com)

        * analyze.c (diff_2_files): OUTPUT_IFDEF is now robust.
        * diff.h (ROBUST_OUTPUT_STYLE): Likewise.
        (default_line_format): Remove.  All refs removed.

        * ifdef.c (print_ifdef_lines): Add %L.  Optimize %l\n even if user
        specified it, as opposed to its being the default.

Tue Sep 29 19:01:28 1992  Paul Eggert  (eggert@twinsun.com)

        * diff.c (longopts, main): --{old,new,unchanged,changed}--group-format
        are new options, so that -D is no longer overloaded.  Set
        no_diff_means_no_output if --unchanged-{line,group}-format allows it.
        * diff.h (enum line_class): New type.
        (group_format, line_format): Use it to regularize option flags.
        All refs changed.

        * ifdef.c (format_ifdef, print_ifdef_lines): %n is no longer a format.

Mon Sep 28 04:51:42 1992  Paul Eggert  (eggert@twinsun.com)

        * diff.c (main, usage): Replace --line-prefix with the more general
        --{old,new,unchanged}-line-format options.
        * ifdef.c (format_ifdef, print_ifdef_lines): Likewise.
        * diff.h (line_format): Renamed from line_prefix.  All refs changed.
        * diff.h, ifdef.c (default_line_format): New variable.
        * util.c (output_1_line): New function.
        (print_1_line): Use it.

        * ifdef.c: (format_ifdef, print_ifdef_lines): Add %0 format.

Sun Sep 27 05:38:13 1992  Paul Eggert  (eggert@twinsun.com)

        * diff.c (main): Add -E or --line-prefix option.  Add -D'=xxx'
        for common lines.  Change default -D< format from copy of -D>
        format to to -D<%<; similarly for default -D> format.
        * diff.h (common_format, line_prefix): New variables.
        * ifdef.c (format_ifdef): New function.
        (print_ifdef_script, print_ifdef_hunk, print_ifdef_lines):
        Use it for -D'=xxx', -E.

        * context.c (find_hunk): Glue together two non-ignorable changes that
        are exactly CONTEXT * 2 lines apart.  This shortens output, removes
        a behavioral discontinuity at CONTEXT = 0, and is more compatible
        with traditional diff.

        * io.c (find_identical_ends): Slurp stdin at most once.

        * util.c (print_line_line): line_flag is const char *.

Thu Sep 24 15:18:07 1992  Paul Eggert  (eggert@twinsun.com)

        * ifdef.c (print_ifdef_lines): New function, which fwrites a sequence
        of lines all at once for speed.
        (print_ifdef_script, print_ifdef_hunk): Use it.

Thu Sep 24 05:54:14 1992  Paul Eggert  (eggert@twinsun.com)

        * diff.c (main): Support new -D options for if-then-else formats.
        (specify_format): New function.
        * diff.h (ifndef_format, ifdef_format, ifnelse_format): New variables.
        * ifdef.c (print_ifdef_hunk): Use the new variables instead of
        a hardwired format.

        * side.c (print_1sdiff_line): Represent incomplete lines on output.
        (print_sdiff_script): Likewise.  Don't print 'q' at end,
        since that doesn't work with incomplete lines.
        * sdiff.c (interact): Don't assume diff output ends with 'q' line.
        * diff.h (ROBUST_OUTPUT_STYLE): OUTPUT_SDIFF is now robust.

        * sdiff.c (lf_copy, lf_snarf): Use memchr instead of index,
        to avoid dumping core when files contain null characters.
        (memchr): New function (if memchr is missing).

        * io.c (sip): New arg SKIP_TEST to skip test for binary file.
        (read_files): Don't bother testing second file if first is binary.

Thu Sep 17 21:17:49 1992  David J. MacKenzie  (djm@nutrimat.gnu.ai.mit.edu)

        * system.h [!USG && !_POSIX_VERSION]: Protect from conflicting
        prototype for wait in sys/wait.h.

Wed Sep 16 12:32:18 1992  David J. MacKenzie  (djm@nutrimat.gnu.ai.mit.edu)

        * Makefile.in: Include binprefix in -DDIFF_PROGRAM.

Tue Sep 15 14:27:25 1992  David J. MacKenzie  (djm@nutrimat.gnu.ai.mit.edu)

        * Version 2.0.

Sat Sep 12 01:31:19 1992  David J. MacKenzie  (djm@nutrimat.gnu.ai.mit.edu)

        * util.c, diff.h, system.h [!HAVE_MEMCHR]: Don't use void *
        and const when declaring memchr replacement.  Declare memchr
        if !STDC_HEADERS && !USG.

Thu Sep 10 15:17:32 1992  David J. MacKenzie  (djm@nutrimat.gnu.ai.mit.edu)

        * Makefile.in (uninstall): New target.

        * diff.c (excluded_filename): Use fnmatch, not wildmat.
        (usage): Document -x, -X, --exclude, --exclude-from.
        Makefile.in: Use fnmatch.c, not wildmat.c.

Sun Sep  6 23:46:25 1992  Paul Eggert (eggert@twinsun.com)

        * configure.in: Add HAVE_MEMCHR.
        * diff.h, util.c: Use it instead of MEMCHR_MISSING.

Sun Sep  6 07:25:49 1992  Paul Eggert (eggert@twinsun.com)

        * diff.h: (struct line_def): Replace this 3-word struct with char *.
        This uses less memory, particularly for large files with short lines.
        (struct file_data): New member linbuf_base counts number of lines
        in common prefix that are not recorded in linbuf;
        this uses less memory if files are identical or differ only at end.
        New member buffered_lines counts possibly differing lines.
        New member valid_lines counts valid data.
        New member alloc_lines - linbuf_base replaces old linbufsize.
        linbuf[0] now always points at first differing line.
        Remove unused members ltran, suffix_lines.
        Add const where appropriate.
        (Is_space): New macro, for consistent definition of `white space'.
        (excluded_filename, memchr, sip, slurp): New declarations.
        * ed.c (print_ed_hunk): Adjust to diff.h's struct changes.
        * context.c (pr_context_hunk): Likewise.
        * ifdef.c (print_ifdef_script): Likewise.
        * side.c (print_sdiff_script, print_half_line): Likewise.
        * util.c (analyze_hunk, line_cmp, print_1_line): Likewise.

        * analyze.c (shift_boundaries): Remove unneeded variable `end' and
        unnecessary comparisons of `preceding' and `other_preceding' against 0.
        (diff_2_files): When comparing files byte-by-byte for equality,
        don't slurp them all in at once; just compare them a buffer at a time.
        This can win big if they differ early on.
        Move some code to compare_files to enable this change.
        Use only one buffer for stdin with `diff - -'.
        (discard_confusing_lines, diff_2_files): Coalesce malloc/free calls.
        (build_script): Remove obsolete OUTPUT_RCS code.

        * diff.c (add_exclude, add_exclude_file, excluded_filename): New fns.
        (main): Use them for the new --exclude and --exclude-from options.
        (compare_files): Don't open a file unless it must be read.
        Treat `diff file file' and `diff file dir' similarly.
        Move some code here from diff_2_files to enable this.
        Simplify file vs dir warning.

        * dir.c (dir_sort): Support new --exclude* options.

        * io.c (struct equivclass): Put hash code and line length here instead
        of struct line_def, so that they can be shared.
        (find_and_hash_each_line): Compute equivalence class as we go,
        instead of doing it in a separate pass; this thrashes memory less.
        Make buckets realloc-able, since we can't preallocate them.
        Record one more line start than there are lines, so that we can compute
        any line's length by subtracting its start from the next line's,
        instead of storing the length explicitly.  This saves memory.
        Move prefix-handling code to find_identical_ends;
        this wins with large prefixes.
        Use Is_space, not is_space, for consistent treatment of white space.
        (prepare_text_end): New function.
        (find_identical_ends): Move slurping here, so it's only done when
        needed.  Work even if the buffers are the same (because of `diff - -').
        Compare prefixes a word at a time for speed.
        (find_equiv_class): Delete; now done by find_and_hash_each_line.
        (read_files): Don't slurp unless needed.
        find_equiv_class's work is now folded into find_and_hash_each_line.
        Don't copy stdin buffer if `diff - -'.
        Check for running out of primes.
        (sip, slurp): Split first part of `slurp' into another function `sip'.
        `sip' sets things up and perhaps reads the first ST_BLKSIZE buffer to
        see whether the file is binary; `slurp' now just finishes the job.
        This lets diff_2_files compare binary files lazily.
        Allocate a one-word sentinel to allow word-at-a-time prefix comparison.
        Count prefix lines only if needed, only count the first file's prefix.
        Don't bother to count suffix lines; it's never needed.
        Set up linbuf[0] to point at first differing line.
        (binary_file_p): Change test for binary files:
        if it has a null byte in its first buffer, it's binary.
        (primes): Add more primes.

        * util.c (line_cmp): Use bcmp for speed.
        Use Is_space, not is_space, for consistent treatment of white space.
        (translate_line_number): Internal line numbers now count from 0
        starting after the prefix.
        (memchr): New function (if memchr is missing).

        * Makefile.in: Document HAVE_ST_BLKSIZE.  Link with wildmat.o.
        * system.h (STAT_BLOCKSIZE): New macro based on HAVE_ST_BLKSIZE.
        * configure.in: Add AC_ST_BLKSIZE.
        * wildmat.c: New file.

Fri Sep  4 01:28:51 1992  Richard Stallman  (rms@mole.gnu.ai.mit.edu)

        * sdiff.c (xmalloc): Renamed from ck_malloc.  Callers changed.

Thu Sep  3 15:28:59 1992  David J. MacKenzie  (djm@nutrimat.gnu.ai.mit.edu)

        * diff.h: Don't declare free, index, rindex.

Tue Aug 11 22:18:06 1992  John Gilmore  (gnu at cygnus.com)

        * io.c (binary_file_p):  Use heuristic to avoid declaring info
        files as binary files.  Allow about 1.5% non-printing
        characters (in info's case, ^_).

Tue Jul  7 01:09:26 1992  David J. MacKenzie  (djm@nutrimat.gnu.ai.mit.edu)

        * diff.h: Replace function_regexp and ignore_regexp with lists
        of compiled regexps.
        * analyze.c, context.c, util.c: Test whether the lists, not
        the old variables, are empty.
        * util.c (analyze_hunk), context.c (find_function): Compare
        lines with the lists of regexps.
        * diff.c (add_regexp): New function.
        (main): Use it.

        * diff3: Add -v --version option.
        * Makefile.in: Link with version.o.

        * system.h: New file.
        * diff.h, cmp.c, diff3.c, sdiff.c: Use it.

        * diff.h, diff3.c: Include string.h or strings.h, as appropriate.
        Declare malloc and realloc.

        * diff3.c (perror_with_exit): Include program name in message.

        * diff3.c: Lowercase error messages for GNU standards.

        * sdiff.c [USG || STDC_HEADERS]: Define bcopy in terms of memcpy.

        * sdiff.c: Use the version number from version.c.
        * Makefile.in: Link with version.o.

        * cmp.c error.c xmalloc.c: New files from textutils.
        * Makefile.in: Add rules for them.

        * diff.c (longopts): --unidirectional-new-file is like -P, not -N.
        Rename --file-label to --label (leave old name, but undocumented).

        * sdiff.c, diff.c (usage): Condense messages and fix some errors.

        * diff3.c (main, usage): Add long-named options.

Fri Jul  3 14:31:18 1992  David J. MacKenzie  (djm@nutrimat.gnu.ai.mit.edu)

        * diff.h, diff3.c, sdiff.c: Change FOO_MISSING macros to HAVE_FOO.

Thu Jun 25 16:59:47 1992  David J. MacKenzie  (djm@apple-gunkies.gnu.ai.mit.edu)

        * diff.c: --reversed-ed -> --forward-ed.

Wed Feb 26 12:17:32 1992  Paul Eggert  (eggert@yata.uucp)

        * analyze.c, diff.c, diff.h, io.c: For -y, compare even if same file.

Fri Feb 14 22:46:38 1992  Richard Stallman  (rms@mole.gnu.ai.mit.edu)

        * io.c, diff3.c, analyze.c: Add extra parentheses.

Sun Feb  9 00:22:42 1992  Richard Stallman  (rms@mole.gnu.ai.mit.edu)

        * diff.h (unidirectional_new_file_flag): New variable.
        * diff.c (main): Set that for -P.
        (compare_files): Support -P, somewhat like -N.
        (longopts): Support long name for -P.

Sat Jan  4 20:10:34 1992  Paul Eggert (eggert at yata.uucp)

        * Makefile.in: Distribute diff.info-* too.

        * README, sdiff.c: version number now matches version.c.

        * configure: Fix and document vfork test.

        * ifdef.c: Don't dump core if `diff -Dx f f'.

Mon Dec 23 23:36:08 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

        * diff.h, diff3.c, sdiff.c: Change POSIX ifdefs to
        HAVE_UNISTD_H and _POSIX_VERSION.

Wed Dec 18 17:00:31 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

        * Makefile.in (srcs): Add sdiff.c.
        (tapefiles): Add diff.texi and diff.info.

        * diff.h, diff3.c, sdiff.c: Use HAVE_VFORK_H instead of
        VFORK_HEADER and VFORK_WORKS.

Tue Dec 17 00:02:59 1991  Paul Eggert  (eggert at yata.uucp)

        * Makefile.in (all): Add diff.info, sdiff.

        * configure, diff.c, sdiff.c:
        Prefix long options with `--', not `+'.
        * diff.c: Regularize option names.

        * configure: Fix check for vfork.
        * configure, diff.c, diff.h, diff3.c, sdiff.c:
        Use Posix definitions when possible.

        * context.c: Align context with tab if -T is given.  Tune.
        * diff.c, diff.h, side.c: Calculate column widths so that tabs line up.
        * io.c: Add distinction between white space and printing chars.
        * side.c: Don't expand tabs unless -t is given.
        * side.c, util.c: Tab expansion now knows about '\b', '\f', '\r', '\v'.
        * util.c: -w skips all white space.  Remove lint.  Tune.

        * sdiff.c: Support many more diff options, e.g. `-', `sdiff file dir'.
        Ignore interrupts while the subsidiary editor is in control.
        Clean up temporary file and kill subsidiary diff if interrupted.
        Ensure subsidiary diff doesn't ignore SIGPIPE.
        Don't get confused while waiting for two subprocesses.
        Don't let buffers overflow.  Check for I/O errors.
        Convert to GNU style.  Tune.

        * sdiff.c, util.c: Don't lose errno.
        Don't confuse sdiff with messages like `Binary files differ'.
        * sdiff.c, side.c: Don't assume that common lines are identical.
        Simplify --sdiff-merge-assist format.

Mon Sep 16 16:42:01 1991  Tom Lord  (lord at churchy.gnu.ai.mit.edu)

        * Makefile.in, sdiff.c: introduced sdiff front end to diff.

        * Makefile.in, analyze.c, diff.c, diff.h, io.c, side.c: Added
        sdiff-style output format to diff.

Mon Aug 26 16:44:55 1991  David J. MacKenzie  (djm at pogo.gnu.ai.mit.edu)

        * Makefile.in, configure: Only put $< in Makefile if using VPATH,
        because older makes don't understand it.

Fri Aug  2 12:22:30 1991  David J. MacKenzie  (djm at apple-gunkies)

        * configure: Create config.status.  Remove it and Makefile if
        interrupted while creating them.

Thu Aug  1 22:24:31 1991  David J. MacKenzie  (djm at apple-gunkies)

        * configure: Check for +srcdir etc. arg and look for
        Makefile.in in that directory.  Set VPATH if srcdir is not `.'.
        * Makefile.in: Get rid of $(archpfx).

Tue Jul 30 21:28:44 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

        * Makefile.in (prefix): Renamed from DESTDIR.

Wed Jul 24 23:08:56 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

        * diff.h, diff3.c: Rearrange ifdefs to use POSIX,
        STDC_HEADERS, VFORK_MISSING, DIRENT.  This way it works on
        more systems that aren't pure USG or BSD.
        Don't not define const if __GNUC__ is defined -- that would
        break with -traditional.
        * configure: Check for those features.

Wed Jul 10 01:39:23 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

        * configure, Makefile.in: $(INSTALLPROG) -> $(INSTALL).

Sat Jul  6 16:39:04 1991  David J. MacKenzie  (djm at geech.gnu.ai.mit.edu)

        * Replace Makefile with configure and Makefile.in.
        Update README with current compilation instructions.

Sat Jul  6 14:03:29 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

        * util.c (setup_output): Just save the args for later use.
        (begin_output): Do the real work, with the values that were saved.
        It's safe to call begin_output more than once.
        Print the special headers for context format here.
        * analyze.c (diff_2_files): Don't print special headers here.
        * context.c (pr_context_hunk, pr_unidiff_hunk): Call begin_output.
        * ed.c (print_ed_hunk, print_forward_ed_hunk, print_rcs_hunk):
        * normal.c (print_normal_hunk): Likewise.
        * ifdef.c (print_ifdef_hunk): Likewise.
        * util.c (finish_output): Don't die if begin_output was not called.

Thu Jun 20 23:10:01 1991  David J. MacKenzie  (djm at geech.gnu.ai.mit.edu)

        * Makefile: Add TAGS, distclean, and realclean targets.
        Set SHELL.

Tue Apr 30 13:54:36 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

        * diff.h (TRUE, FALSE): Undefine these before defining.

Thu Mar 14 18:27:27 1991  Richard Stallman  (rms@mole.ai.mit.edu)

        * Makefile (objs): Include $(ALLOCA).

Sat Mar  9 22:34:03 1991  Richard Stallman  (rms at mole.ai.mit.edu)

        * diff.h: Include regex.h.

Thu Feb 28 18:59:53 1991  Richard Stallman  (rms at mole.ai.mit.edu)

        * Makefile (diff3): Link with GNU getopt.

Sat Feb 23 12:49:43 1991  Richard Stallman  (rms at mole.ai.mit.edu)

        * io.c (find_equiv_class): Make hash code unsigned before mod.

        * diff.h (files): Add EXTERN.

Sun Jan 13 21:33:01 1991  Richard Stallman  (rms at mole.ai.mit.edu)

        * diff.c: +print option renamed +paginate.  Remove +all-text.

Mon Jan  7 06:18:01 1991  David J. MacKenzie  (djm at geech.ai.mit.edu)

        * Makefile (dist): New target, replacing diff.tar and
        diff.tar.Z, to encode version number in distribution directory
        and tar file names.

Sun Jan  6 18:42:23 1991  Michael I Bushnell  (mib at geech.ai.mit.edu)

        * Version 1.15 released.

        * version.c: Updated from 1.15 alpha to 1.15

        * context.c (print_context_number_range,
        print_unidiff_number_range): Don't print N,M when N=M, print
        just N instead.

        * README: Updated for version 1.15.
        Makefile: Updated for version 1.15.

        * diff3.c (main): Don't get confused if one of the arguments
        is a directory.

        * diff.c (compare_files): Don't get confused if comparing
        standard input to a directory; print error instead.

        * analyze.c (diff_2_files), context.c (print_context_header,
        print_context_script), diff.c (main), diff.h (enum
        output_style): Tread unidiff as an output style in its own
        right.  This also generates an error when both -u and -c are
        given.

        * diff.c (main): Better error messages when regexps are bad.

        * diff.c (compare_files): Don't assume stdin is opened.

        * diff3.c (read_diff): Don't assume things about the order of
        descriptor assignment and closes.

        * util.c (setup_output): Don't assume things about the order
        of descriptor assignment and closes.

        * diff.c (compare_files): Set a flag so that closes don't
        happen more than once.

        * diff.c (main): Don't just flush stdout, do a close.  That
        way on broken systems we can still get errors.

Mon Dec 24 16:24:17 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * diff.c (usage): Use = for args of long options.

Mon Dec 17 18:19:20 1990  Michael I Bushnell  (mib at geech.ai.mit.edu)

        * context.c (print_context_label): Labels were interchanged badly.

        * context.c (pr_unidiff_hunk): Changes to deal with files
        ending in incomplete lines.
        * util.c (print_1_line): Other half of the changes.

Mon Dec  3 14:23:55 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * diff.c (longopts, usage): unidiff => unified.

Wed Nov  7 17:13:08 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * analyze.c (diff_2_files): No warnings about newlines for -D.

        * diff.c (pr_unidiff_hunk): Remove ref to output_patch_flag.

Tue Oct 23 23:19:18 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * diff.c (compare_files): For -D, compare even args are same file.
        * analyze.c (diff_2_files): Likewise.
        Also, output even if files have no differences.

        * analyze.c (diff_2_files): Print missing newline messages last.
        Return 2 if a newline is missing.
        Print them even if files end with identical text.

Mon Oct 22 19:40:09 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * diff.c (usage): Return 2.

Wed Oct 10 20:54:04 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * diff.c (longopts): Add +new-files.

Sun Sep 23 22:49:29 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * context.c (print_context_script): Handle unidiff_flag.
        (print_context_header): Likewise.
        (print_unidiff_number_range, pr_unidiff_hunk): New functions.
        * diff.c (longopts): Add element for +unidiff.
        (main): Handle +unidiff and -u.
        (usage): Mention them.

Wed Sep  5 16:33:22 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * io.c (find_and_hash_each_line): Deal with missing final newline
        after buffering necessary context lines.

Sat Sep  1 16:32:32 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * io.c (find_identical_ends): ROBUST_OUTPUT_FORMAT test was backward.

Thu Aug 23 17:17:20 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * diff3.c (WIFEXITED): Undef it if WEXITSTATUS is not defined.
        * context.c (find_function): Don't try to return values.

Wed Aug 22 11:54:39 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * diff.h (O_RDONLY): Define if not defined.

Tue Aug 21 13:49:26 1990  Richard Stallman  (rms at mole.ai.mit.edu)

        * Handle -L option.
        * context.c (print_context_label): New function.
        (print_context_header): Use that.
        * diff.c (main): Recognize the option.
        (usage): Updated.
        * diff.h (file_label): New variable.
        * diff3.c (main): Recognize -L instead of -t.

        * diff3.c (main): Support -m without other option.

        * diff3.c (WEXITSTATUS, WIFEXITED): Define whenever not defined.

        * diff3.c (bcopy, index, rindex): Delete definitions; not used.
        (D_LINENUM, D_LINELEN): Likewise.
        (struct diff_block): lengths includes newlines.
        (struct diff3_block): Likewise.
        (always_text, merge): New variables.
        (read_diff): Return address of end, not size read.  Calls changed.
        Pass -a to diff if given to diff3.
        current_chunk_size now an int.  Detect error in `pipe'.
        Check for incomplete line of output here.
        (scan_diff_line): Don't make scan_ptr + 2 before knowing it is valid.
        No need to check validity of diff output here.
        Include newline in length of line.
        (main): Compute rev_mapping here.  Handle -a and -m.
        Error message if excess -t operands.  Error for incompatible options.
        Error if `-' given more than once.
        Fix error storing in tag_strings.
        (output_diff3): REV_MAPPING is now an arg.  Call changed.
        Change syntax of "missing newline" message.
        Expect length of line to include newline.
        (output_diff3_edscript): Return just 0 or 1.
        REV_MAPPING is now an arg.  Call changed.
        (output_diff3_merge): New function.
        (process_diff): Better error message for bad diff format.
        (fatal, perror_with_exit): Return status 2.

        * analyze.c (diff_2_files): Report missing newline in either
        or both files, if not robust output style.

        * util.c (setup_output): Detect error from pipe.
        No need to close stdin.

        * util.c (print_1_line): Change format of missing-newline msg.
        Change if statements to switch.

        * io.c (slurp): Don't mention differences in final newline if -B.

        * io.c (binary_file_p): Use ISO char set as criterion, not ASCII.

        * io.c (find_identical_ends): Increase value of BEG0 by 1.
        Other changes in backwards scan to avoid decrementing pointers
        before start of array, and set LINES properly.

        * diff.h (ROBUST_OUTPUT_STYLE): New macro.
        * io.c (find_identical_ends, find_and_hash_each_line): Use that macro.

        * diff.h (dup2): Don't define if XENIX.

        * diff.c (main): Check for write error at end.

        * context.c (find_function): Don't return a value.
        Use argument FILE rather than global files.

        * analyze.c: Add external function declarations.
        * analyze.c (build_script): Turn off explicit check for final newline.

        * analyze.c (discard_confusing_lines): Make integers unsigned.

Tue Jul 31 21:37:16 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * io.c (find_and_hash_each_line): Correct the criterion
        for leaving out the newline from the end of the line.

Tue May 29 21:28:16 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * dir.c (diff_dirs): Free things only if nonzero.

Mon Apr 16 18:31:05 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff.h (NDIR_IN_SYS): New macro controls location of ndir.h.

        * diff3.c (xmalloc, xrealloc): Don't die if size == 0 returns 0.

Sun Mar 25 15:58:42 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * analyze.c (discard_confusing_lines):
        `many' wasn't being used; use it.
        Canceling provisionals near start of run must handle already
        canceled provisionals.
        Canceling subruns of provisionals was canceling last nonprovisional.

Sat Mar 24 14:02:51 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * analyze.c (discard_confusing_lines):
        Threshold for line occurring many times scales by square root
        of total lines.
        Within each run, cancel any long subrun of provisionals.
        Don't update `provisional' while canceling provisionals.
        In big outer loop, handle provisional and nonprovisional separately.

Thu Mar 22 16:35:33 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * analyze.c (discard_confusing_lines):
        The first loops to discard provisionals from ends failed to step.
        In second such loops, keep discarding all consecutive provisionals.
        Increase threshold for stopping discarding, and also check for
        consecutive nondiscardables as separate threshold.

Fri Mar 16 00:33:08 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff3.c (read_diff): Pass -- as first arg to diff.

        * diff3.c: Include wait.h or define equivalent macros.
        (read_diff): Don't use stdio printing error in the inferior.
        Remember the pid and wait for it.  Report failing status.
        Report failure of vfork.

Sun Mar 11 17:10:32 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff3.c (main): Accept -t options and pass to output_diff3_edscript.
        (usage): Mention -t.
        (read_diff): Use vfork.
        (vfork): Don't use it on Sparc.

        * diff.h (vfork): Don't use it on Sparc.

Tue Mar  6 22:37:20 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff3.c (dup2): Don't define on Xenix.

        * Makefile: Comments for Xenix.

Thu Mar  1 17:19:23 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * analyze.c (diff_2_files): `message' requires three args.

Fri Feb 23 10:56:50 1990  David J. MacKenzie  (djm at albert.ai.mit.edu)

        * diff.h, util.c, diff3.c: Change 'void *' to 'VOID *', with
        VOID defined as void if __STDC__, char if not.

Sun Feb 18 20:31:58 1990  David J. MacKenzie  (djm at albert.ai.mit.edu)

        * Makefile: Add rules for getopt.c, getopt1.c, getopt.h.

        * getopt.c, getopt.h, getopt1.c: New files.

        * main.c (main, usage): Add long options.

        * analyze.c (shift_boundaries): Remove unused var 'j_end'.

Thu Feb  8 02:43:16 1990  Jim Kingdon  (kingdon at pogo.ai.mit.edu)

        * GNUmakefile: include ../Makerules before Makefile.

Fri Feb  2 23:21:38 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * analyze.c (diff_2_files): If -B or -I, don't return 1
        if all changes were ignored.

Wed Jan 24 20:43:57 1990  Richard Stallman  (rms at albert.ai.mit.edu)

        * diff3.c (fatal): Output to stderr.

Thu Jan 11 00:25:56 1990  David J. MacKenzie  (djm at hobbes.ai.mit.edu)

        * diff.c (usage): Mention -v.

Wed Jan 10 16:06:38 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff3.c (output_diff3_edscript): Return number of overlaps.
        (main): If have overlaps, exit with status 1.

Sun Dec 24 10:29:20 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * io.c (find_equiv_class): Fix typo that came from changing init of B
        to an assignment.

        * version.c: New file.
        * diff.c (main): -v prints version number.

        * io.c (binary_file_p): Null char implies binary file.

Fri Nov 17 23:44:55 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * util.c (print_1_line): Fix off by 1 error.

Thu Nov 16 13:51:10 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * util.c (xcalloc): Function deleted.

        * io.c (slurp): Null-terminate the buffer.

        * io.c (read_files): Delete unused vars.

        * io.c (find_equiv_class): Don't index by N if too low.

        * dir.c (dir_sort): Delete the extra declaration of compare_names.

        * diff.h: Don't declare xcalloc.  Declare some other functions.

        * analyze.c (shift_boundaries):
        Test for END at end of range before indexing by it.
        Fix misspelling of `preceding' in var names.

Sat Nov 11 14:04:16 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff3.c (using_to_diff3_block): Delete unused vars.
        (make_3way_diff, process_diff_control, read_diff, output_diff3): Likewise.

Mon Nov  6 18:15:50 EST 1989 Jay Fenlason (hack@ai.mit.edu)

        * README Fix typo.

Fri Nov  3 15:27:47 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff.c (usage): Mention -D.

        * ifdef.c (print_ifdef_hunk): Write comments on #else and #endif.

Sun Oct 29 16:41:07 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff.c (compare_files): Don't fflush for identical files.

Wed Oct 25 17:57:12 1989  Randy Smith  (randy at apple-gunkies.ai.mit.edu)

        * diff3.c (using_to_diff3_block): When defaulting lines from
        FILE0, only copy up to just under the *lowest* line mentioned
        in the next diff.

        * diff3.c (fatal): Add \n to error messages.

Wed Oct 25 15:05:49 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * Makefile (tapefiles): Add ChangeLog.

Tue Oct  3 00:51:17 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff3.c (process_diff, create_diff3_block): Init ->next field.

Fri Sep 29 08:16:45 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * util.c (line_cmp): Alter end char of line 2, not line 1.

Wed Sep 20 00:12:37 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * Makefile (diff.tar): Expect ln to fail on some files;
        copy them with cp.

Mon Sep 18 02:54:29 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * Handle -D option:
        * io.c (find_and_hash_each_line): Keep all lines of 1st file.
        * diff.c (main): Handle -D option.
        (compare_files): Reject -D if files spec'd are directories.
        * analyze.c (diff_2_files): Handle OUTPUT_IFDEF case.

Fri Sep  1 20:15:50 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff.c (option_list): Rename arg VECTOR as OPTIONVEC.

Mon Aug 28 17:58:27 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff.c (compare_files): Clear entire inf[i].stat.

Wed Aug 23 17:48:47 1989  Richard Stallman  (rms at apple-gunkies.ai.mit.edu)

        * io.c (find_identical_ends): Sign was backward
        determining where to bound the scan for the suffix.

Wed Aug 16 12:49:16 1989  Richard Stallman  (rms at hobbes.ai.mit.edu)

        * analyze.c (diff_2_files): If -q, treat all files as binary.
        * diff.c (main): Detect -q, record in no_details_flag.

Sun Jul 30 23:12:00 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff.c (usage): New function.
        (main): Call it.

Wed Jul 26 02:02:19 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff.c (main): Make -C imply -c.

Thu Jul 20 17:57:51 1989  Chris Hanson  (cph at kleph)

        * io.c (find_and_hash_each_line): Bug fix in context handling,
        introduced by last change.

Fri Jul 14 17:39:20 1989  Chris Hanson  (cph at kleph)

        * analyze.c: To make RCS work correctly on files that don't
        necessarily end in newline, introduce some changes that cause
        diffs to be sensitive to missing final newline.  Because
        non-RCS modes don't want to be affected by these changes, they
        are conditional on `output_style == OUTPUT_RCS'.
        (diff_2_files) [OUTPUT_RCS]: Suppress the "File X missing
        newline" message.
        (build_script) [OUTPUT_RCS]: Cause the last line to compare as
        different if exactly one of the files is missing its final
        newline.

        * io.c (find_and_hash_each_line): Bug fix in
        ignore_space_change mode.  Change line's length to include the
        newline.  For OUTPUT_RCS, decrement last line's length if
        there is no final newline.
        (find_identical_ends) [OUTPUT_RCS]: If one of the files is
        missing a final newline, make sure it's not included in either
        the prefix or suffix.

        * util.c (print_1_line): Change line output routine to account
        for line length including the newline.

Tue Jun 27 02:35:28 1989  Roland McGrath  (roland at hobbes.ai.mit.edu)

        * Makefile: Inserted $(archpfx) where appropriate.

Wed May 17 20:18:43 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff3.c [USG]: Include fcntl.h.

        * diff.h [USG]: New compilation flags HAVE_NDIR, HAVE_DIRECT.

Wed Apr 26 15:35:57 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * dir.c (diff_dirs): Two new args, NONEX1 and NONEX2, say to pretend
        nonex dirs are empty.
        (dir_sort): New arg NONEX, likewise.
        * diff.c (compare_files): Pass those args.
        Sometimes call diff_dirs if subdir exists in just one place.

Wed Apr 12 01:10:27 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * io.c (find_identical_ends): Set END0 *after* last char
        during backward scan for suffix.

Sat Apr  8 15:49:49 1989  Randall Smith  (randy at apple-gunkies.ai.mit.edu)

        * diff3.c (using_to_diff3_block): Now find high marks in files 1
        and 2 through mapping off of the last difference instead of the
        first.

        * diff3.c: Many trivial changes to spelling inside comments.

Fri Feb 24 12:38:03 1989  Randall Smith  (randy at gluteus.ai.mit.edu)

        * util.c, normal.c, io.c, ed.c, dir.c, diff.h, diff.c, context.c,
        analyze.c, Makefile: Changed copyright header to conform with new
        GNU General Public license.
        * diff3.c: Changed copyright header to conform with new GNU
        General Public license.
        * COPYING: Made a hard link to /gp/rms/COPYING.

Fri Feb 24 10:01:58 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * io.c (slurp): Leave 2 chars space at end of buffer, not one.
        (find_identical_ends): Special case if either file is empty;
        don't try to make a sentinel since could crash.

Wed Feb 15 14:24:48 1989  Jay Fenlason  (hack at apple-gunkies.ai.mit.edu)

        * diff3.c (message)  Re-wrote routine to avoid using alloca()

Wed Feb 15 06:19:14 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * io.c (find_identical_ends): Delete the variable `bytes'.

Sun Feb 12 11:50:36 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * io.c (slurp): ->bufsize is nominal amount we have room for;
        add room for sentinel when calling xmalloc or xrealloc.

        * io.c (find_identical_ends): Do need overrun check in finding suffix.

Fri Feb 10 01:28:15 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff.c (main): -C now takes arg to specify context length.
        Now -p to show C function name--Damned IEEE!
        Fatal error if context length spec'd twice.

        * ed.c (print_ed_hunk): Now special treatment only for lines containing
        precisely a dot and nothing else.  Output `..', end the insert,
        substitute that one line, then resume the insert if nec.

        * io.c (find_and_hash_lines): When backing up over starting context,
        don't move past buffer-beg.

        * io.c (find_identical_ends): Use sentinels to make the loops faster.
        If files are identical, skip the 2nd loop and return quickly.
        (slurp): Leave 1 char extra space after each buffer.

        * analyze.c (diff_2_files): Mention difference in final newlines.

Wed Jan 25 22:44:44 1989  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * dir.c (diff_dirs): Use * when calling fcn ptr variable.

Sat Dec 17 14:12:06 1988  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * Makefile: New vars INSTALL and LIBS used in some rules;
        provide default defns plus commented-put defns for sysV.

Thu Nov 17 16:42:53 1988  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * dir.c (dir_sort): Open-trouble not fatal; just say # files is -1.
        (diff_dirs): If dir_sort does that, give up and return 2.

        * diff.c (compare_files): Don't open directories.
        Don't close them specially either.
        Cross-propagate inf[i].dir_p sooner.

Sun Nov 13 11:19:36 1988  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

        * diff.h: Declare index, rindex.

        * diff.c (compare_files): If comparing foodir with b/f,
        use foodir/f, not foodir/b/f.

        * diff.c (compare_files): Don't print "are identical" msg for 2 dirs.
        Status now 1 if one file is a dir and the other isn't, etc.

Thu Nov  3 16:30:24 1988  Randall Smith  (randy at gluteus.ai.mit.edu)

        * Makefile: Added a define for diff3 to define DIFF_PROGRAM.

        * util.c: Added hack to make sure that perror was not called with
        a null pointer.

        * diff.c: Changed S_IFDIR to S_IFMT in masking type of file bits
        out.

        * diff3.c: Included USG compatibility defines.

        * diff.h: Moved sys/file.h into #else USG section (not needed or
        wanted on System V).

        * ed.c, analyze.c, context.c: Shortened names to 12 characters for
        the sake of System V (too simple not to do).


Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1997, 1998, 1999,
2000, 2001, 2002 Free Software Foundation, Inc.

This file is part of GNU Diffutils.

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 2, or (at your option)
any later version.

This program is distributed in the hope that they 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; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.