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