change.log

GNU 系统开发的基于Iz77语法的压缩 学习lz77压缩算法

	  Define OF in lzw.h for lint.
	  Allow both "znew -v -t" and "znew -vt".
	  Don't overwrite the output file name for multiple parts.
	  Echo just a warning if configure is out of date.
	  Use ; instead of , in trees.c (confuses the SAS Amiga compiler).
	  In INSTALL, document "DEFS='-DM_XENIX' ./configure".
	  Use OTHER_PATH_SEP for more portability (DOS, OS2, VMS, AMIGA).
	  Make all directories world writable for broken versions of tar.
	  Use gzip -cd instead of zcat in zmore, zcmp, zdiff.
	  Don't use GNU tar for distributions, some systems can't untar.
	  Do not exit() for gzip --version.

Mon Jan 26 10:26:42 1993  Jean-loup Gailly  ([e-mail])

	* Beta version 0.8.2
	  Avoid 'far' declarations for MSDOS.
	  Use test -f instead of test -x in configure.in (for Ultrix)
	  Add empty else part to if in Makefile.in for broken shells.
	  Use NO_UNDERLINE instead of UNDERLINE (pb with Linux cpp)
	  Accept continuation files with -ff (for damage recovery)
	  Small patch to Makefile.os2
	  Use memzero instead of bzero to avoid potential conflicts
	  Document restriction on extraction of zip files.
	  Fix quoting in ACL_HAVE_SHELL_HACK.
          Do not check file size on MSDOS because of bug in DIET.
	  Allow zcat on a file with multiple links.
	  Add fix in inflate.c for compatibility with pkzip 2.04c.
	  Release gzip in tar.z and tar format. (No tar.Z).

Fri Jan 22 10:04:13 1993  Jean-loup Gailly  ([e-mail])

	* Beta version 0.8.1
	  Fixed Makefile.os2
	  Fixed #if directives that TurboC does not like.
	  Don't rely on uncompress in znew, use gzip -d.
	  Add the pipe option -P in znew.
	  Add some more ideas in TODO.
	  Support both NDIR and SYSNDIR.

Sat Jan  21 15:46:38 1993  Jean-loup Gailly  ([e-mail])

	* Beta version 0.8
	  Support unpack.
	  Check for _match.o in configure.in in addition to return status.
	  Include <sys/types.h> in zip.c
	  Define local variables and functions as local.
	  Accept more alternative names for the program (pcat, gzcat, ...).
	  Accept .exe as well as .EXE.
	  Uncompress files with multiple links only with -f.
	  Better error message for gunzip of non-existent file.z.
	  Fix the entry for /etc/magic in INSTALL.
	  Use AC_HAVE_HEADERS uniformly instead of special macros.
	  Install the man pages as .1 by default instead of .l.
	  Document crypt++.el in README.
	  Fix for unlzw() on 16-bit machines (bitmask must be unsigned).
	  Complain if input and output files are identical.
	  Create a correct output name for files of exactly 13 chars.
	  Do not overwrite CPP if set
	  Check for i386 before trying to assemble match.s
	  Check for underline in external name before assembling
	  Add patch for tar 1.11.1.

Mon Jan  5 10:16:24 1993  Jean-loup Gailly  ([e-mail])

	* Beta version 0.7
	  Use "make check" instead of "make test".
	  Do not rely on dirname in znew.
	  Keep time stamp and pass options to gzip in znew.
	  Rename .l files back to .1 to avoid conflict with lex
	  Do not create .z.z files with gzip -r.
	  Use nice_match in match.asm
	  Unroll loops in deflate.c
	  Do not attempt matches beyond the window end
	  Allow again gunzip .zip files (was working in 0.5)
	  Allow again compilation with TurboC 2.0 (was working in 0.4)

Tue Dec 30 20:00:19 1992  Jean-loup Gailly  ([e-mail])

	* Beta version 0.6
	  The .z extension is used by pack, not compact (README, gzip.1)
	  Accept gzcat in addition to zcat.
	  Use PAGER in zmore if defined.
	  Man pages for /usr/local/man/manl should have extension .l.
	  Don't redefine bzero on the NeXT
	  Allow incomplete Huffman table if there is only one code.
	  Don't lookahead more than 7 bits (caused premature EOF).
	  Added "make test" to check for compiler bugs.
	  Don't rely on `i386`; try to assemble directly
	  Change magic header to avoid conflict with freeze 1.x.
	  Added entry for /etc/magic in INSTALL.
	  Do not destroy an input .zip file with more than one member.
	  Display "untested" instead of "OK" for gzip -t foo.Z
	  With -t, skip stdin in .Z format
	  Allow multiple compressed members in an input file.
	  Ignore a zero time stamp.
	  Made znew safer.

Tue Dec 29 10:00:19 1992   Noah Friedman  ([e-mail])

	  Added test for #!/bin/sh in configure.in.
	  Fix some references to $srcdir in Makefile.in

Mon Dec 21 17:33:35 1992  Jean-Loup Gailly  ([e-mail])

	* Beta version 0.5
	  Put RCS ids in all files.
	  Added znew to recompress old .Z files with gzip.
	  Avoid "already .z suffix" messages for -r and no -v.
	  Put back check for d_ino in treat_dir().
	  Use HAVE_STRING_H instead of USG.
	  Added os2/Makefile.os2
	  Use SYSUTIME on OS/2.
	  Info dir is $(prefix)/info, not $(prefix)/lib/info.
	  Support long options, added getopt and alloca
	  Support -V and -t
	  Reorder configure.in according to suggestions in autoconf.info
	  Allow links when not removing original file
	  Allow either .z or .Z in zdiff

Wed Nov 25 11:40:04 1992  Jean-loup Gailly  ([e-mail])

	* Beta version 0.4.1
	  Save only the original base name, don't include any directory prefix.
	  Don't use HAVE_LONG_FILE_NAMES (support multiple file system types).
	  Fix declaration of abort_gzip in gzip.h.
	  Include unistd.h when it exists to avoid warnings with gcc -Wall.

Mon Nov 23 12:39:01 1992    Jean-loup Gailly  ([e-mail])

	* Beta version 0.4
          Lots of cleanup
	  Use autoconf generated 'configure'
          Fixed the NO_MULTIPLE_DOTS code
          Fixed the save_orig_name code
          Support for MSDOS (Turbo C)

Thu Nov 19 15:18:22 1992    Jean-loup Gailly  ([e-mail])

	* Beta version 0.3
	  Added auto configuration. Just type "make" now.
	  Don't overwrite compress by default in "make install". Use
	    "make install_compress" to overwrite.
	  Add match.s for 386 boxes.
	  Added documentation in texinfo format.
	  Provide help for "gunzip" invoked without redirected input.
	  Save original file name when necessary.
	  Support OS/2 (Kai-Uwe Rommel).

Tue Nov 17 14:32:53 1992  Jean-loup Gailly  ([e-mail])

	* Alpha version 0.2.4
	  Return 0 in get_istat() when ok (caused error with zcat).
	  Don't update crc on compressed data (caused crc errors on
	    large files).

Fri Nov 13 15:04:12 1992  Jean-loup Gailly  ([e-mail])

	* Alpha version 0.2.3
	  Initialize rsize in unlzw.c
	  Initialize ofd for zcat.
	  Do not use volatile ifname as argument of treat_dir.
	  Add -1 to -9 in gzip.1.

Sat Oct 31 18:30:00 1992  Jean-loup Gailly  ([e-mail])

	* Alpha version 0.2.2.
	  Fix error messages.
	  Accept gunzip on zip files.

Sat Oct 31 17:15:00 1992  Jean-loup Gailly  ([e-mail])

	* Alpha version 0.2.1
	  Use ctype.h in util.c (problem on SysV).
	  Create BINDIR if it does not exist.
	  Use cc by default.
	  Added zcmp, zmore, zdiff.
	  Fixed the man page gzip.1.

Sat Oct 31 17:00:00 1992  Jean-loup Gailly  ([e-mail])

	* Alpha version 0.2
	  Fixed compilation problems with gcc

Sat Oct 31 12:46:00 1992  Jean-loup Gailly  ([e-mail])

	* Alpha version 0.1 released (under time pressure), so it's not
	  much tested, sorry.