src/lzma/history.txt
author Ryan C. Gordon <icculus@icculus.org>
Fri, 27 Mar 2009 15:10:42 -0400
changeset 972 254427fc42ab
parent 917 lzma/history.txt@d299a58a274f
permissions -rw-r--r--
Moved directory structure around.

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

  4.57           2007-12-12
  -------------------------
    - Speed optimizations in ++ 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