lib_generic/lzma/history.txt

HISTORY of the LZMA SDK
-----------------------

  4.57		 2007-12-12
  -------------------------
    - Speed optimizations in Ñ++ LZMA Decoder.
    - Small changes for more compatibility with some C/C++ compilers.


  4.49 beta	 2007-07-05
  -------------------------
    - .7z ANSI-C Decoder:
	 - now it supports BCJ and BCJ2 filters
	 - now it supports files larger than 4 GB.
	 - now it supports "Last Write Time" field for files.
    - C++ code for .7z archives compressing/decompressing from 7-zip
      was included to LZMA SDK.


  4.43		 2006-06-04
  -------------------------
    - Small changes for more compatibility with some C/C++ compilers.


  4.42		 2006-05-15
  -------------------------
    - Small changes in .h files in ANSI-C version.


  4.39 beta	 2006-04-14
  -------------------------
    - Bug in versions 4.33b:4.38b was fixed:
      C++ version of LZMA encoder could not correctly compress
      files larger than 2 GB with HC4 match finder (-mfhc4).


  4.37 beta	 2005-04-06
  -------------------------
    - Fixes in C++ code: code could no be compiled if _NO_EXCEPTIONS was defined.


  4.35 beta	 2005-03-02
  -------------------------
    - Bug was fixed in C++ version of LZMA Decoder:
       If encoded stream was corrupted, decoder could access memory
       outside of allocated range.


  4.34 beta	 2006-02-27
  -------------------------
    - Compressing speed and memory requirements for compressing were increased
    - LZMA now can use only these match finders: HC4, BT2, BT3, BT4


  4.32		 2005-12-09
  -------------------------
    - Java version of LZMA SDK was included


  4.30		 2005-11-20
  -------------------------
    - Compression ratio was improved in -a2 mode
    - Speed optimizations for compressing in -a2 mode
    - -fb switch now supports values up to 273
    - Bug in 7z_C (7zIn.c) was fixed:
      It used Alloc/Free functions from different memory pools.
      So if program used two memory pools, it worked incorrectly.
    - 7z_C: .7z format supporting was improved
    - LZMA# SDK (C#.NET version) was included


  4.27 (Updated) 2005-09-21
  -------------------------
   - Some GUIDs/interfaces in C++ were changed.
     IStream.h:
       ISequentialInStream::Read now works as old ReadPart
       ISequentialOutStream::Write now works as old WritePart


  4.27		 2005-08-07
  -------------------------
    - Bug in LzmaDecodeSize.c was fixed:
       if _LZMA_IN_CB and _LZMA_OUT_READ were defined,
       decompressing worked incorrectly.


  4.26		 2005-08-05
  -------------------------
    - Fixes in 7z_C code and LzmaTest.c:
      previous versions could work incorrectly,
      if malloc(0) returns 0


  4.23		 2005-06-29
  -------------------------
    - Small fixes in C++ code


  4.22		 2005-06-10
  -------------------------
    - Small fixes


  4.21		 2005-06-08
  -------------------------
    - Interfaces for ANSI-C LZMA Decoder (LzmaDecode.c) were changed
    - New additional version of ANSI-C LZMA Decoder with zlib-like interface:
	- LzmaStateDecode.h
	- LzmaStateDecode.c
	- LzmaStateTest.c
    - ANSI-C LZMA Decoder now can decompress files larger than 4 GB


  4.17		 2005-04-18
  -------------------------
    - New example for RAM->RAM compressing/decompressing:
      LZMA + BCJ (filter for x86 code):
	- LzmaRam.h
	- LzmaRam.cpp
	- LzmaRamDecode.h
	- LzmaRamDecode.c
	- -f86 switch for lzma.exe


  4.16		 2005-03-29
  -------------------------
    - Bug was fixed in LzmaDecode.c (ANSI-C LZMA Decoder):
       If _LZMA_OUT_READ was defined, and if encoded stream was corrupted,
       decoder could access memory outside of allocated range.
    - Speed optimization of ANSI-C LZMA Decoder (now it's about 20% faster).
      Old version of LZMA Decoder now is in file LzmaDecodeSize.c.
      LzmaDecodeSize.c can provide slightly smaller code than LzmaDecode.c
    - Small speed optimization in LZMA C++ code
    - filter for SPARC's code was added
    - Simplified version of .7z ANSI-C Decoder was included


  4.06		 2004-09-05
  -------------------------
    - Bug in v4.05 was fixed:
	LZMA-Encoder didn't release output stream in some cases.


  4.05		 2004-08-25
  -------------------------
    - Source code of filters for x86, IA-64, ARM, ARM-Thumb
      and PowerPC code was included to SDK
    - Some internal minor changes


  4.04		 2004-07-28
  -------------------------
    - More compatibility with some C++ compilers


  4.03		 2004-06-18
  -------------------------
    - "Benchmark" command was added. It measures compressing
      and decompressing speed and shows rating values.
      Also it checks hardware errors.


  4.02		 2004-06-10
  -------------------------
    - C++ LZMA Encoder/Decoder code now is more portable
      and it can be compiled by GCC on Linux.


  4.01		 2004-02-15
  -------------------------
    - Some detection of data corruption was enabled.
	LzmaDecode.c / RangeDecoderReadByte
	.....
	{
	  rd->ExtraBytes = 1;
	  return 0xFF;
	}


  4.00		 2004-02-13
  -------------------------
    - Original version of LZMA SDK



HISTORY of the LZMA
-------------------
  2001-2007:  Improvements to LZMA compressing/decompressing code,
	      keeping compatibility with original LZMA format
  1996-2001:  Development of LZMA compression format

  Some milestones:

  2001-08-30: LZMA compression was added to 7-Zip
  1999-01-02: First version of 7-Zip was released


End of document