2013-09-20 Antonio Diaz Diaz <antonio@gnu.org> * Version 1.15 released. * Show progress of compression at verbosity level 2 (-vv). * main.cc (show_header): Do not show header version. * Ignore option '-n, --threads' for compatibility with plzip. * configure: Options now accept a separate argument. * Added chapter 'Stream format' and appendix 'Reference source code' to the manual. 2013-02-17 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.14 released. * Multi-step trials have been implemented. * Compression ratio has been slightly increased. * Compression time has been reduced by 5%. * Decompression time has been reduced by 12%. * Makefile.in: Added new target 'install-bin'. * main.cc: Use 'setmode' instead of '_setmode' on Windows and OS/2. * main.cc: Define 'strtoull' to 'std::strtoul' on Windows. 2012-02-24 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.13 released. * Lziprecover has been moved to its own package. * main.cc (close_and_set_permissions): Inability to change output file attributes has been downgraded from error to warning. * Compression time of option '-0' has been reduced by 2%. * Reorganization of the compression code. * Small change in '--help' output and man page. * Changed quote characters in messages as advised by GNU Standards. * configure: 'datadir' renamed to 'datarootdir'. * 'testsuite/unzcrash.cc' has been moved to package 'lziprecover'. 2011-04-30 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.12 released. * main.cc: Added new option '-F, --recompress'. * encoder.h (update_prices): Update high length symbol prices independently of the value of 'pos_state'. This gives better compression for large values of '--match-length' without being slower. * encoder.h encoder.cc: Optimize pair price calculations. This reduces compression time for large values of '--match-length' by up to 6%. * Compression time of option '-0' has been reduced by 2%. * main.cc (decompress): Print only one status line for each multi-member file when only one '-v' is specified. * main.cc (decompress): Print up to 6 bytes of trailing garbage when '-vvvv' is specified. * main.cc (open_instream): Do not show the message " and '--stdout' was not specified" for directories, etc. * lziprecover.cc: If '-v' is not specified show errors only. * testsuite/unzcrash.cc: Use Arg_parser. * testsuite/unzcrash.cc: Added new option '-b, --bits'. * testsuite/unzcrash.cc: Added new option '-p, --position'. * testsuite/unzcrash.cc: Added new option '-s, --size'. 2010-09-16 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.11 released. * Added new option '-0' which produces a compression speed and ratio comparable to those of 'gzip -9'. * fast_encoder.h fast_encoder.cc: New files. * main.cc: Match length limit set by options -1 to -8 has been reduced to extend range of use towards gzip. Lower numbers now compress less but faster. (-1 now takes 43% less time for only 20% larger compressed size). * encoder.cc: Compression of option -9 has been slightly increased. * lziprecover.cc: Added new option '-m, --merge' which tries to produce a correct file merging the good parts of two or more damaged copies. * lziprecover.cc: Added new option '-R, --repair' for repairing a 1-byte error in single-member files. * decoder.cc (decode_member): Detect file errors earlier to improve efficiency of lziprecover's new repair capability. This change also prevents (harmless) access to uninitialized memory when decompressing a corrupt file. * lziprecover.cc: Added new option '-f, --force'. * lziprecover.cc: Added new option '-o, --output'. * lziprecover.cc: Added new option '-s, --split' to select the until now only operation of splitting multi-member files. * lziprecover.cc: If no operation is specified, warn the user and do nothing. * main.cc: Fixed warning about fchown's return value being ignored. * decoder.cc: '-tvvvv' now also shows compression ratio. * main.cc: Set stdin/stdout in binary mode on MSVC and OS2. * New examples have been added to the manual. * testsuite: 'test1' renamed to 'test.txt'. Added new tests. * Matchfinder types HC4 (4 bytes hash-chain) and HT4 (4 bytes hash-table) have been tested and found no better than the current BT4. 2010-04-05 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.10 released. * decoder.h: Input_buffer integrated in Range_decoder. * main.cc: File specified with option '-o' is now created with mode 0666 if umask allows it, deleted if interrupted by user. * main.cc: New constant 'o_binary'. * main.cc: Dictionary size for options -2, -3, -4 and -8 has been changed to improve linearity of compressed sizes. * lzip.h: Fixed warnings produced by over-optimization (-O3). * Makefile.in: Added quotes to directory names. 2010-01-17 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.9 released. * main.cc (main): Return at least 1 if closing stdout fails. * Makefile.in: Added '--name' option to help2man invocation. * testsuite/check.sh: Use 'test1' instead of 'COPYING' for testing. 2009-09-02 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.8 released. * Compression time has been reduced by 4%. * Lzdiff and lzgrep have been moved to the new package zutils. * Fixed warnings on sistems where uint32_t != unsigned int. 2009-06-25 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.7 released. * decoder.h (copy_block): Fixed memcpy overlap introduced in 1.6. 2009-06-22 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.6 released. * Decompression time has been reduced by 17%. * Added decompression support for Sync Flush marker. * Added support for .tbz extension to lzdiff and lzgrep. * Added man pages for lzdiff, lzgrep and lziprecover. * encoder.cc (Matchfinder): Reduce memory use to 9x if input file is smaller than dictionary size limit. * decoder.cc: Added extra flush calls to improve partial decompression of corrupt files. * '--test' no more needs '/dev/null'. * Removed some 'bashisms' from lzdiff and lzgrep. * Dictionary size for options '-1' to '-4' has been changed. * main.cc (signal_handler): Declared as 'extern "C"'. * Makefile.in: Extra files are now installed by default. * testsuite/check.sh: Test lziprecover. * Added 'export LC_ALL=C' to all scripts. 2009-04-12 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.5 released. * lzip.h: Coded dictionary size implemented in File_header. * Fixed some includes that prevented compilation with GCC 4.4. * 'member_size' and 'volume_size' are now accurate limits. * Compression speed has been improved. * Implemented bt4 type matchfinder. * Added chapter 'Algorithm' to the manual. * Lzdiff and lzgrep now accept '-h' for '--help' and '-V' for '--version'. * Makefile.in: Man page is now installed by default. * testsuite/check.sh: Verify that files are open in binary mode. 2009-01-24 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.4 released. * Implemented compression of version 1 files. * Added new option '-b, --member-size'. * Added new option '-S, --volume-size'. * Added new option '-o, --output'. * main.cc: Read from non regular files if '--stdout' is specified. * Added 'lziprecover', a member recoverer program. * testsuite/unzcrash.cc: Test all 1-byte errors. 2008-12-21 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.3 released. * This version automatically chooses the smallest possible dictionary size for each file during compression, saving memory during decompression. * Implemented decompression of version 1 files. * testsuite/check.sh: Replaced 'diff -q' with 'cmp'. 2008-12-10 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.2 released. * encoder.cc: A 1-byte read outside allocated memory has been fixed. * lzip.h: Dictionary size limit has been reduced to 512MiB because setting it to 1GiB causes overflow of a 32 bit integer. * Added 'lzdiff', a diff/cmp wrapper for gzip, bzip2, lzip and non-compressed files. * Added 'lzgrep', a grep wrapper for gzip, bzip2, lzip and non-compressed files. * 'make install-info' should now work on Debian and OS X. 2008-11-17 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.1 released. * Changed short name of option '--dictionary-size' to '-s'. * Changed short name of option '--match-length' to '-m'. * Changed LONG_LONG_MAX to LLONG_MAX. 2008-10-14 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 1.0 released. * '-tvv' shows file version and dictionary size. 2008-09-30 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 0.5 released. * Decompression is now 1% faster. 2008-09-23 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 0.4 released. * Code cleanup for global variable 'verbosity'. * Regained the compression ratio of 0.2 with 5% faster speed. * Fixed compilation on sistems where size_t != unsigned int. 2008-09-15 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 0.3 released. * encoder.cc: Compression is now 15% faster, 1% worse. * main.cc (main): Make '-t' option override '-c'. * main.cc (decompress): Show 'done' instead of 'ok' when not testing. * encoder.h: Use trials[] to return the list of pairs. 2008-09-09 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 0.2 released. * encoder.cc: Small improvements in compression speed. * Small documentation changes. 2008-08-20 Antonio Diaz Diaz <ant_diaz@teleline.es> * Version 0.1 released. Copyright (C) 2008, 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz. This file is a collection of facts, and thus it is not copyrightable, but just in case, you have unlimited permission to copy, distribute and modify it.
