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718112a8fe
Currently none of these is being used, but eventually they will, once more code gets ported over. So it's better to have them right away and avoid editing the project file too much, only to revert that later.
446 lines
13 KiB
Text
446 lines
13 KiB
Text
HISTORY of the LZMA SDK
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-----------------------
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19.00 2019-02-21
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-------------------------
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- Encryption strength for 7z archives was increased:
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the size of random initialization vector was increased from 64-bit to 128-bit,
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and the pseudo-random number generator was improved.
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- The bug in 7zIn.c code was fixed.
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18.06 2018-12-30
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-------------------------
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- The speed for LZMA/LZMA2 compressing was increased by 3-10%,
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and there are minor changes in compression ratio.
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- Some bugs were fixed.
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- The bug in 7-Zip 18.02-18.05 was fixed:
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There was memory leak in multithreading xz decoder - XzDecMt_Decode(),
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if xz stream contains only one block.
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- The changes for MSVS compiler makefiles:
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- the makefiles now use "PLATFORM" macroname with values (x64, x86, arm64)
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instead of "CPU" macroname with values (AMD64, ARM64).
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- the makefiles by default now use static version of the run-time library.
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18.05 2018-04-30
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-------------------------
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- The speed for LZMA/LZMA2 compressing was increased
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by 8% for fastest/fast compression levels and
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by 3% for normal/maximum compression levels.
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- Previous versions of 7-Zip could work incorrectly in "Large memory pages" mode in
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Windows 10 because of some BUG with "Large Pages" in Windows 10.
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Now 7-Zip doesn't use "Large Pages" on Windows 10 up to revision 1709 (16299).
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- The BUG was fixed in Lzma2Enc.c
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Lzma2Enc_Encode2() function worked incorretly,
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if (inStream == NULL) and the number of block threads is more than 1.
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18.03 beta 2018-03-04
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-------------------------
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- Asm\x86\LzmaDecOpt.asm: new optimized LZMA decoder written in asm
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for x64 with about 30% higher speed than main version of LZMA decoder written in C.
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- The speed for single-thread LZMA/LZMA2 decoder written in C was increased by 3%.
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- 7-Zip now can use multi-threading for 7z/LZMA2 decoding,
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if there are multiple independent data chunks in LZMA2 stream.
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- 7-Zip now can use multi-threading for xz decoding,
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if there are multiple blocks in xz stream.
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18.01 2019-01-28
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-------------------------
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- The BUG in 17.01 - 18.00 beta was fixed:
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XzDec.c : random block unpacking and XzUnpacker_IsBlockFinished()
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didn't work correctly for xz archives without checksum (CRC).
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18.00 beta 2019-01-10
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-------------------------
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- The BUG in xz encoder was fixed:
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There was memory leak of 16 KB for each file compressed with
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xz compression method, if additional filter was used.
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17.01 beta 2017-08-28
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-------------------------
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- Minor speed optimization for LZMA2 (xz and 7z) multi-threading compression.
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7-Zip now uses additional memory buffers for multi-block LZMA2 compression.
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CPU utilization was slightly improved.
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- 7-zip now creates multi-block xz archives by default. Block size can be
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specified with -ms[Size]{m|g} switch.
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- xz decoder now can unpack random block from multi-block xz archives.
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- 7-Zip command line: @listfile now doesn't work after -- switch.
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Use -i@listfile before -- switch instead.
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- The BUGs were fixed:
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7-Zip 17.00 beta crashed for commands that write anti-item to 7z archive.
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17.00 beta 2017-04-29
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-------------------------
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- NewHandler.h / NewHandler.cpp:
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now it redefines operator new() only for old MSVC compilers (_MSC_VER < 1900).
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- C/7zTypes.h : the names of variables in interface structures were changed (vt).
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- Some bugs were fixed. 7-Zip could crash in some cases.
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- Some internal changes in code.
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16.04 2016-10-04
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-------------------------
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- The bug was fixed in DllSecur.c.
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16.03 2016-09-28
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-------------------------
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- SFX modules now use some protection against DLL preloading attack.
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- Some bugs in 7z code were fixed.
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16.02 2016-05-21
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-------------------------
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- The BUG in 16.00 - 16.01 was fixed:
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Split Handler (SplitHandler.cpp) returned incorrect
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total size value (kpidSize) for split archives.
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16.01 2016-05-19
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-------------------------
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- Some internal changes to reduce the number of compiler warnings.
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16.00 2016-05-10
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-------------------------
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- Some bugs were fixed.
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15.12 2015-11-19
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-------------------------
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- The BUG in C version of 7z decoder was fixed:
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7zDec.c : SzDecodeLzma2()
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7z decoder could mistakenly report about decoding error for some 7z archives
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that use LZMA2 compression method.
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The probability to get that mistaken decoding error report was about
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one error per 16384 solid blocks for solid blocks larger than 16 KB (compressed size).
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- The BUG (in 9.26-15.11) in C version of 7z decoder was fixed:
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7zArcIn.c : SzReadHeader2()
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7z decoder worked incorrectly for 7z archives that contain
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empty solid blocks, that can be placed to 7z archive, if some file is
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unavailable for reading during archive creation.
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15.09 beta 2015-10-16
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-------------------------
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- The BUG in LZMA / LZMA2 encoding code was fixed.
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The BUG in LzFind.c::MatchFinder_ReadBlock() function.
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If input data size is larger than (4 GiB - dictionary_size),
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the following code worked incorrectly:
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- LZMA : LzmaEnc_MemEncode(), LzmaEncode() : LZMA encoding functions
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for compressing from memory to memory.
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That BUG is not related to LZMA encoder version that works via streams.
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- LZMA2 : multi-threaded version of LZMA2 encoder worked incorrectly, if
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default value of chunk size (CLzma2EncProps::blockSize) is changed
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to value larger than (4 GiB - dictionary_size).
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9.38 beta 2015-01-03
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-------------------------
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- The BUG in 9.31-9.37 was fixed:
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IArchiveGetRawProps interface was disabled for 7z archives.
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- The BUG in 9.26-9.36 was fixed:
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Some code in CPP\7zip\Archive\7z\ worked correctly only under Windows.
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9.36 beta 2014-12-26
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-------------------------
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- The BUG in command line version was fixed:
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7-Zip created temporary archive in current folder during update archive
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operation, if -w{Path} switch was not specified.
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The fixed 7-Zip creates temporary archive in folder that contains updated archive.
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- The BUG in 9.33-9.35 was fixed:
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7-Zip silently ignored file reading errors during 7z or gz archive creation,
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and the created archive contained only part of file that was read before error.
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The fixed 7-Zip stops archive creation and it reports about error.
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9.35 beta 2014-12-07
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-------------------------
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- 7zr.exe now support AES encryption.
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- SFX mudules were added to LZMA SDK
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- Some bugs were fixed.
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9.21 beta 2011-04-11
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-------------------------
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- New class FString for file names at file systems.
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- Speed optimization in CRC code for big-endian CPUs.
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- The BUG in Lzma2Dec.c was fixed:
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Lzma2Decode function didn't work.
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9.18 beta 2010-11-02
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-------------------------
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- New small SFX module for installers (SfxSetup).
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9.12 beta 2010-03-24
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-------------------------
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- The BUG in LZMA SDK 9.* was fixed: LZMA2 codec didn't work,
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if more than 10 threads were used (or more than 20 threads in some modes).
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9.11 beta 2010-03-15
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-------------------------
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- PPMd compression method support
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9.09 2009-12-12
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-------------------------
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- The bug was fixed:
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Utf16_To_Utf8 funstions in UTFConvert.cpp and 7zMain.c
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incorrectly converted surrogate characters (the code >= 0x10000) to UTF-8.
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- Some bugs were fixed
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9.06 2009-08-17
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-------------------------
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- Some changes in ANSI-C 7z Decoder interfaces.
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9.04 2009-05-30
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-------------------------
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- LZMA2 compression method support
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- xz format support
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4.65 2009-02-03
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-------------------------
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- Some minor fixes
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4.63 2008-12-31
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-------------------------
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- Some minor fixes
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4.61 beta 2008-11-23
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-------------------------
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- The bug in ANSI-C LZMA Decoder was fixed:
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If encoded stream was corrupted, decoder could access memory
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outside of allocated range.
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- Some changes in ANSI-C 7z Decoder interfaces.
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- LZMA SDK is placed in the public domain.
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4.60 beta 2008-08-19
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-------------------------
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- Some minor fixes.
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4.59 beta 2008-08-13
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-------------------------
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- The bug was fixed:
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LZMA Encoder in fast compression mode could access memory outside of
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allocated range in some rare cases.
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4.58 beta 2008-05-05
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-------------------------
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- ANSI-C LZMA Decoder was rewritten for speed optimizations.
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- ANSI-C LZMA Encoder was included to LZMA SDK.
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- C++ LZMA code now is just wrapper over ANSI-C code.
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4.57 2007-12-12
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-------------------------
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- Speed optimizations in <20>++ LZMA Decoder.
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- Small changes for more compatibility with some C/C++ compilers.
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4.49 beta 2007-07-05
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-------------------------
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- .7z ANSI-C Decoder:
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- now it supports BCJ and BCJ2 filters
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- now it supports files larger than 4 GB.
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- now it supports "Last Write Time" field for files.
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- C++ code for .7z archives compressing/decompressing from 7-zip
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was included to LZMA SDK.
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4.43 2006-06-04
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-------------------------
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- Small changes for more compatibility with some C/C++ compilers.
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4.42 2006-05-15
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-------------------------
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- Small changes in .h files in ANSI-C version.
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4.39 beta 2006-04-14
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-------------------------
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- The bug in versions 4.33b:4.38b was fixed:
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C++ version of LZMA encoder could not correctly compress
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files larger than 2 GB with HC4 match finder (-mfhc4).
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4.37 beta 2005-04-06
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-------------------------
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- Fixes in C++ code: code could no be compiled if _NO_EXCEPTIONS was defined.
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4.35 beta 2005-03-02
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-------------------------
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- The bug was fixed in C++ version of LZMA Decoder:
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If encoded stream was corrupted, decoder could access memory
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outside of allocated range.
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4.34 beta 2006-02-27
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-------------------------
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- Compressing speed and memory requirements for compressing were increased
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- LZMA now can use only these match finders: HC4, BT2, BT3, BT4
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4.32 2005-12-09
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-------------------------
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- Java version of LZMA SDK was included
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4.30 2005-11-20
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-------------------------
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- Compression ratio was improved in -a2 mode
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- Speed optimizations for compressing in -a2 mode
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- -fb switch now supports values up to 273
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- The bug in 7z_C (7zIn.c) was fixed:
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It used Alloc/Free functions from different memory pools.
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So if program used two memory pools, it worked incorrectly.
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- 7z_C: .7z format supporting was improved
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- LZMA# SDK (C#.NET version) was included
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4.27 (Updated) 2005-09-21
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-------------------------
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- Some GUIDs/interfaces in C++ were changed.
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IStream.h:
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ISequentialInStream::Read now works as old ReadPart
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ISequentialOutStream::Write now works as old WritePart
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4.27 2005-08-07
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-------------------------
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- The bug in LzmaDecodeSize.c was fixed:
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if _LZMA_IN_CB and _LZMA_OUT_READ were defined,
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decompressing worked incorrectly.
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4.26 2005-08-05
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-------------------------
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- Fixes in 7z_C code and LzmaTest.c:
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previous versions could work incorrectly,
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if malloc(0) returns 0
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4.23 2005-06-29
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-------------------------
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- Small fixes in C++ code
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4.22 2005-06-10
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-------------------------
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- Small fixes
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4.21 2005-06-08
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-------------------------
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- Interfaces for ANSI-C LZMA Decoder (LzmaDecode.c) were changed
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- New additional version of ANSI-C LZMA Decoder with zlib-like interface:
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- LzmaStateDecode.h
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- LzmaStateDecode.c
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- LzmaStateTest.c
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- ANSI-C LZMA Decoder now can decompress files larger than 4 GB
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4.17 2005-04-18
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-------------------------
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- New example for RAM->RAM compressing/decompressing:
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LZMA + BCJ (filter for x86 code):
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- LzmaRam.h
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- LzmaRam.cpp
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- LzmaRamDecode.h
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- LzmaRamDecode.c
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- -f86 switch for lzma.exe
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4.16 2005-03-29
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-------------------------
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- The bug was fixed in LzmaDecode.c (ANSI-C LZMA Decoder):
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If _LZMA_OUT_READ was defined, and if encoded stream was corrupted,
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decoder could access memory outside of allocated range.
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- Speed optimization of ANSI-C LZMA Decoder (now it's about 20% faster).
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Old version of LZMA Decoder now is in file LzmaDecodeSize.c.
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LzmaDecodeSize.c can provide slightly smaller code than LzmaDecode.c
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- Small speed optimization in LZMA C++ code
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- filter for SPARC's code was added
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- Simplified version of .7z ANSI-C Decoder was included
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4.06 2004-09-05
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-------------------------
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- The bug in v4.05 was fixed:
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LZMA-Encoder didn't release output stream in some cases.
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4.05 2004-08-25
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-------------------------
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- Source code of filters for x86, IA-64, ARM, ARM-Thumb
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and PowerPC code was included to SDK
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- Some internal minor changes
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4.04 2004-07-28
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-------------------------
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- More compatibility with some C++ compilers
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4.03 2004-06-18
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-------------------------
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- "Benchmark" command was added. It measures compressing
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and decompressing speed and shows rating values.
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Also it checks hardware errors.
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4.02 2004-06-10
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-------------------------
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- C++ LZMA Encoder/Decoder code now is more portable
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and it can be compiled by GCC on Linux.
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4.01 2004-02-15
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-------------------------
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- Some detection of data corruption was enabled.
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LzmaDecode.c / RangeDecoderReadByte
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.....
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{
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rd->ExtraBytes = 1;
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return 0xFF;
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}
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4.00 2004-02-13
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-------------------------
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- Original version of LZMA SDK
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HISTORY of the LZMA
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-------------------
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2001-2008: Improvements to LZMA compressing/decompressing code,
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keeping compatibility with original LZMA format
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1996-2001: Development of LZMA compression format
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Some milestones:
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2001-08-30: LZMA compression was added to 7-Zip
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1999-01-02: First version of 7-Zip was released
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End of document
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