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Antonio Diaz Diaz
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LZLib version 1.12 from January 4, 2021
git-svn-id: file:///srv/devel/repo-conversion/dumps/svni@22 5c7ffd35-e7a3-48a6-a47a-8795029375b0
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‎AUTHORS‎

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Lzlib was written by Antonio Diaz Diaz.
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The ideas embodied in lzlib are due to (at least) the following people:
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Abraham Lempel and Jacob Ziv (for the LZ algorithm), Andrey Markov (for
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the definition of Markov chains), G.N.N. Martin (for the definition of
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range encoding), Igor Pavlov (for putting all the above together in
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LZMA), and Julian Seward (for bzip2's CLI).
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Abraham Lempel and Jacob Ziv (for the LZ algorithm), Andrey Markov (for the
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definition of Markov chains), G.N.N. Martin (for the definition of range
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encoding), Igor Pavlov (for putting all the above together in LZMA), and
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Julian Seward (for bzip2's CLI).

‎COPYING‎

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Lzlib - Compression library for the lzip format
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Copyright (C) Antonio Diaz Diaz.
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Lzlib - Compression library for the lzip format
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Copyright (C) Antonio Diaz Diaz.
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This library is free software. Redistribution and use in source and
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binary forms, with or without modification, are permitted provided
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that the following conditions are met:
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This library is free software. Redistribution and use in source and
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binary forms, with or without modification, are permitted provided
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that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions, and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions, and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

‎ChangeLog‎

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2021-01-02 Antonio Diaz Diaz <[email protected]>
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* Version 1.12 released.
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* lzlib.h: Define LZ_API_VERSION as 1000 * major + minor. 1.12 = 1012.
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This change does not affect the soversion.
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* lzlib.h, lzlib.c: New function LZ_api_version.
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* LZd_try_verify_trailer: Return 2 if EOF at trailer or EOS marker.
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* Decompression speed has been slightly increased.
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* decoder.h: Increase 'rd_min_available_bytes' from 8 to 10.
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* encoder_base.c (LZeb_try_sync_flush):
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Compensate for the increase in 'rd_min_available_bytes'.
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* main.c (do_decompress): Fix false report about library stall.
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* main.c: New option '--check-lib'.
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* main.c (main): Report an error if a file name is empty.
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Make '-o' behave like '-c', but writing to file instead of stdout.
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Make '-c' and '-o' check whether the output is a terminal only once.
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Do not open output if input is a terminal.
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Replace 'decompressed', 'compressed' with 'out', 'in' in output.
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Set a valid invocation_name even if argc == 0.
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* lzlib.texi: Document the new way of verifying the library version.
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Document that 'LZ_(de)compress_close' and 'LZ_(de)compress_errno'
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can be called with a null argument.
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Document that sync flush marker is not allowed in lzip files.
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Document the consequences of not calling 'LZ_decompress_finish'.
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Document that 'LZ_decompress_read' returns at least once per member.
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Document that 'LZ_(de)compress_read' can be called with a null
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buffer pointer argument.
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Real code examples for common uses have been added to the tutorial.
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* bbexample.c: Don't use 'LZ_(de)compress_write_size'.
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* lzcheck.c: New options '-s' (sync) and '-m' (member by member).
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Test member by member without 'LZ_decompress_finish'.
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* ffexample.c: New file containing example functions for file-to-file
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compression/decompression.
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* Document extraction from tar.lz in '--help' output and man page.
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* Makefile.in: 'install-bin' no longer installs the man page.
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New targets 'install-bin-compress' and 'install-bin-strip-compress'.
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* testsuite: Add 9 new test files.
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2019-01-02 Antonio Diaz Diaz <[email protected]>
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* Version 1.11 released.
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* File_* renamed to Lzip_*.
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* Rename File_* to Lzip_*.
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* LZ_decompress_read: Don't return error until all data is read.
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* decoder.c (LZd_decode_member): Decode truncated data until EOF.
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* cbuffer.c (Cb_read_data): Allow a null buffer pointer.
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* main.c: Don't allow mixing different operations (-d and -t).
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* main.c: Check return value of close( infd ).
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* main.c: Compile on DOS with DJGPP.
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* lzlib.texi: Improved descriptions of '-0..-9', '-m' and '-s'.
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* lzlib.texi: Improve descriptions of '-0..-9', '-m', and '-s'.
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Document that 'LZ_(de)compress_finish' can be called repeatedly.
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* configure: Accept appending to CFLAGS, 'CFLAGS+=OPTIONS'.
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* Makefile.in: Targets 'install-bin*' renamed to 'install-lib*'.
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* Makefile.in: Rename targets 'install-bin*' to 'install-lib*'.
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* Makefile.in: Targets 'install-bin*' now install minilzip.
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* INSTALL: Document use of CFLAGS+='-D __USE_MINGW_ANSI_STDIO'.
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* Version 1.10 released.
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* LZ_compress_finish now adjusts dictionary size for each member.
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* lzlib.c (LZ_decompress_read): Detect corrupt header with HD=3.
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* main.c: Added new option '--loose-trailing'.
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* main.c: New option '--loose-trailing'.
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* main.c (main): Option '-S, --volume-size' now keeps input files.
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* main.c: Replaced 'bits/byte' with inverse compression ratio.
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* main.c: Replace 'bits/byte' with inverse compression ratio.
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* main.c: Show final diagnostic when testing multiple files.
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* main.c: Do not add a second .lz extension to the arg of -o.
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* main.c: Show dictionary size at verbosity level 4 (-vvvv).
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* lzlib.texi: Added chapter 'Invoking minilzip'.
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* lzlib.texi: New chapter 'Invoking minilzip'.
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2017-04-11 Antonio Diaz Diaz <[email protected]>
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* Compression time of options -1 to -9 has been reduced by 1%.
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* Decompression time has been reduced by 3%.
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* main.c: Continue testing if any input file is a terminal.
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* License of the library changed to "2-clause BSD".
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* Change the license of the library to "2-clause BSD".
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2016-05-17 Antonio Diaz Diaz <[email protected]>
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* Version 1.8 released.
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* lzlib.h: Define LZ_API_VERSION to 1.
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* decoder.c (LZd_verify_trailer): Removed test of final code.
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* main.c: Added new option '-a, --trailing-error'.
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* lzlib.c (LZ_decompress_sync_to_member): Add skipped size to in_size.
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* decoder.c (LZd_verify_trailer): Remove test of final code.
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* main.c: New option '-a, --trailing-error'.
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* main.c (main): Delete '--output' file if infd is a terminal.
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* main.c (main): Don't use stdin more than once.
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* configure: Avoid warning on some shells when testing for gcc.
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2015-07-08 Antonio Diaz Diaz <[email protected]>
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* Version 1.7 released.
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* Ported fast encoder and option '-0' from lzip.
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* Port fast encoder and option '-0' from lzip.
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* If open-->write-->finish, produce same dictionary size as lzip.
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* Makefile.in: Added new targets 'install*-compress'.
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* Makefile.in: New targets 'install*-compress'.
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2014-08-27 Antonio Diaz Diaz <[email protected]>
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* Version 1.6 released.
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* Compression ratio of option '-9' has been slightly increased.
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* configure: Added new option '--disable-static'.
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* configure: Added new option '--disable-ldconfig'.
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* configure: New options '--disable-static' and '--disable-ldconfig'.
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* Makefile.in: Ignore errors from ldconfig.
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* Makefile.in: Use 'CFLAGS' in every invocation of 'CC'.
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* main.c (close_and_set_permissions): Behave like 'cp -p'.
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* lzlib.texinfo: Renamed to lzlib.texi.
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* License changed to "GPL version 2 or later with link exception".
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* lzlib.texinfo: Rename to lzlib.texi.
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* Change license to "GPL version 2 or later with link exception".
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2013-09-15 Antonio Diaz Diaz <[email protected]>
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* Version 1.5 released.
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* Removed decompression support for version 0 files.
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* Remove decompression support for version 0 files.
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* The LZ_compress_sync_flush mechanism has been fixed (again).
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* Minor fixes.
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* Compression ratio has been slightly increased.
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* Compression time has been reduced by 8%.
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* Decompression time has been reduced by 7%.
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* lzlib.h: Changed 'long long' values to 'unsigned long long'.
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* lzlib.h: Change 'long long' values to 'unsigned long long'.
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* encoder.c (Mf_init): Reduce minimum buffer size to 64KiB.
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* lzlib.c (LZ_decompress_read): Tell LZ_header_error from
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LZ_unexpected_eof the same way as lzip does.
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* Makefile.in: Added new target 'install-as-lzip'.
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* Makefile.in: Added new target 'install-bin'.
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* Makefile.in: New targets 'install-as-lzip' and 'install-bin'.
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* main.c: Use 'setmode' instead of '_setmode' on Windows and OS/2.
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* main.c: Define 'strtoull' to 'strtoul' on Windows.
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2012-02-29 Antonio Diaz Diaz <[email protected]>
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* Version 1.3 released.
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* Translated to C from the C++ source of lzlib 1.2.
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* configure: 'datadir' renamed to 'datarootdir'.
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* configure: Rename 'datadir' to 'datarootdir'.
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2011-10-25 Antonio Diaz Diaz <[email protected]>
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independently of the value of 'pos_state'. This gives better
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compression for large values of '--match-length' without being
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slower.
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* encoder.h encoder.cc: Optimize pair price calculations. This
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reduces compression time for large values of '--match-length'
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by up to 6%.
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* main.cc: Added new option '-F, --recompress'.
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* encoder.h, encoder.cc: Optimize pair price calculations, reducing
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compression time for large values of '--match-length' by up to 6%.
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* main.cc: New option '-F, --recompress'.
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* Makefile.in: 'make install' no longer tries to run
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'/sbin/ldconfig' on systems lacking it.
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* Compression time has been reduced by 2%.
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* All declarations not belonging to the API have been
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encapsulated in the namespace 'Lzlib'.
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* testsuite: 'test1' renamed to 'test.txt'. Added new tests.
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* testsuite: Rename 'test1' to 'test.txt'. New tests.
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* Match length limits set by options -1 to -9 of minilzip have
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been changed to match those of lzip 1.11.
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* main.cc: Set stdin/stdout in binary mode on OS2.
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2010-05-08 Antonio Diaz Diaz <[email protected]>
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* Version 1.0 released.
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* Added new function LZ_decompress_member_finished.
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* Added new function LZ_decompress_member_version.
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* Added new function LZ_decompress_dictionary_size.
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* Added new function LZ_decompress_data_crc.
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* Variables declared 'extern' have been encapsulated in a
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namespace.
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* main.cc: Fixed warning about fchown's return value being ignored.
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* decoder.h: Input_buffer integrated in Range_decoder.
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* New functions LZ_decompress_member_version, LZ_decompress_data_crc,
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LZ_decompress_member_finished, and LZ_decompress_dictionary_size.
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* Variables declared 'extern' have been encapsulated in a namespace.
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* main.cc: Fix warning about fchown's return value being ignored.
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* decoder.h: Integrate Input_buffer in Range_decoder.
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2010-02-10 Antonio Diaz Diaz <[email protected]>
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2010-01-17 Antonio Diaz Diaz <[email protected]>
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* Version 0.8 released.
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* Added new function LZ_decompress_reset.
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* Added new function LZ_decompress_sync_to_member.
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* Added new function LZ_decompress_write_size.
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* Added new function LZ_strerror.
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* lzlib.h: API change. Replaced 'enum' with functions for values
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of dictionary size limits to make interface names consistent.
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* lzlib.h: API change. 'LZ_errno' replaced with 'LZ_Errno'.
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* lzlib.h: API change. Replaced 'void *' with 'struct LZ_Encoder *'
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* New functions LZ_decompress_reset, LZ_decompress_sync_to_member,
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LZ_decompress_write_size, and LZ_strerror.
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* lzlib.h: API change. Replace 'enum' with functions for values of
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dictionary size limits to make interface names consistent.
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* lzlib.h: API change. Rename 'LZ_errno' to 'LZ_Errno'.
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* lzlib.h: API change. Replace 'void *' with 'struct LZ_Encoder *'
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and 'struct LZ_Decoder *' to make interface type safe.
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* decoder.cc: Truncated member trailer is now correctly detected.
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* decoder.cc: A truncated member trailer is now correctly detected.
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* encoder.cc: Matchfinder::reset now also clears at_stream_end_,
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allowing LZ_compress_restart_member to restart a finished stream.
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* lzlib.cc: Accept only query or close operations after a fatal
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error has occurred.
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* Shared version of lzlib is no longer built by default.
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* The shared version of lzlib is no longer built by default.
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* check.sh: Use 'test1' instead of 'COPYING' for testing.
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2009-10-20 Antonio Diaz Diaz <[email protected]>
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* Version 0.7 released.
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* Compression time has been reduced by 4%.
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* check.sh: Removed -9 to run in less than 256MiB of RAM.
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* check.sh: Remove -9 to run in less than 256MiB of RAM.
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* lzcheck.cc: Read files of any size up to 2^63 bytes.
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2009-09-02 Antonio Diaz Diaz <[email protected]>
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* Version 0.5 released.
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* Decompression speed has been improved.
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* main.cc (signal_handler): Declared as 'extern "C"'.
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* main.cc (signal_handler): Declare as 'extern "C"'.
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2009-06-03 Antonio Diaz Diaz <[email protected]>
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* Version 0.4 released.
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* Added new function LZ_compress_sync_flush.
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* Added new function LZ_compress_write_size.
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* New functions LZ_compress_sync_flush and LZ_compress_write_size.
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* Decompression speed has been improved.
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* Added chapter 'Buffering' to the manual.
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* lzlib.texinfo: New chapter 'Buffering'.
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2009-05-03 Antonio Diaz Diaz <[email protected]>
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2009-04-26 Antonio Diaz Diaz <[email protected]>
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* Version 0.2 released.
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* Fixed a segfault when decompressing trailing garbage.
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* Fixed a false positive in LZ_(de)compress_finished.
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* Fix a segfault when decompressing trailing garbage.
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* Fix a false positive in LZ_(de)compress_finished.
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2009-04-21 Antonio Diaz Diaz <[email protected]>
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* Version 0.1 released.
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Copyright (C) 2009-2019 Antonio Diaz Diaz.
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Copyright (C) 2009-2021 Antonio Diaz Diaz.
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This file is a collection of facts, and thus it is not copyrightable,
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but just in case, you have unlimited permission to copy, distribute and
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but just in case, you have unlimited permission to copy, distribute, and
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modify it.

‎INSTALL‎

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Requirements
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------------
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You will need a C compiler.
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I use gcc 5.3.0 and 4.1.2, but the code should compile with any standards
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You will need a C99 compiler. (gcc 3.3.6 or newer is recommended).
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I use gcc 6.1.0 and 4.1.2, but the code should compile with any standards
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compliant compiler.
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Gcc is available at http://gcc.gnu.org.
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The operating system must allow signal handlers read access to objects with
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static storage duration so that the cleanup handler for Control-C can delete
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the partial output file.
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the partial output file. (This requirement is for minilzip only).
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Procedure
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documentation. (You may need to run ldconfig also).
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Or type 'make install-compress', which additionally compresses the
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info manual after installation. (Installing compressed docs may
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become the default in the future).
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info manual after installation.
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(Installing compressed docs may become the default in the future).
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You can install only the library, the info manual or the man page by
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typing 'make install-lib', 'make install-info' or 'make install-man'
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respectively.
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You can install only the library or the info manual by typing
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'make install-lib' or 'make install-info' respectively.
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'make install-bin' installs the minilzip program and its man page.
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'install-bin' installs a shared minilzip if the shared library has
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'make install-bin install-man' installs the program minilzip and its man
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page. 'install-bin' installs a shared minilzip if the shared library has
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been configured. Else it installs a static minilzip.
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'make install-as-lzip' runs 'make install-bin' and then links
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minilzip to the name 'lzip'.
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'make install-bin-compress' additionally compresses the man page after
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installation.
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'make install-as-lzip' runs 'make install-bin' and then links minilzip to
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the name 'lzip'.
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Another way
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-----------
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You can also compile lzlib into a separate directory.
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To do this, you must use a version of 'make' that supports the 'VPATH'
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variable, such as GNU 'make'. 'cd' to the directory where you want the
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To do this, you must use a version of 'make' that supports the variable
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'VPATH', such as GNU 'make'. 'cd' to the directory where you want the
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object files and executables to go and run the 'configure' script.
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'configure' automatically checks for the source code in '.', in '..' and
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'configure' automatically checks for the source code in '.', in '..', and
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in the directory that 'configure' is in.
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'configure' recognizes the option '--srcdir=DIR' to control where to
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explained above.
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Copyright (C) 2009-2019 Antonio Diaz Diaz.
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Copyright (C) 2009-2021 Antonio Diaz Diaz.
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This file is free documentation: you have unlimited permission to copy,
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distribute and modify it.
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distribute, and modify it.

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