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HISTORY of the LZMA SDK↩
-----------------------↩
↩
18.05 2018-04-30↩
-------------------------↩
- The speed for LZMA/LZMA2 compressing was increased ↩
by 8% for fastest/fast compression levels and ↩
by 3% for normal/maximum compression levels.↩
- Previous versions of 7-Zip could work incorrectly in "Large memory pages" mode in↩
Windows 10 because of some BUG with "Large Pages" in Windows 10. ↩
Now 7-Zip doesn't use "Large Pages" on Windows 10 up to revision 1709 (16299).↩
- The BUG was fixed in Lzma2Enc.c↩
Lzma2Enc_Encode2() function worked incorretly,↩
if (inStream == NULL) and the number of block threads is more than 1.↩
↩
↩
18.03 beta 2018-03-04↩
-------------------------↩
- Asm\x86\LzmaDecOpt.asm: new optimized LZMA decoder written in asm ↩
for x64 with about 30% higher speed than main version of LZMA decoder written in C.↩
- The speed for single-thread LZMA/LZMA2 decoder written in C was increased by 3%.↩
- 7-Zip now can use multi-threading for 7z/LZMA2 decoding,↩
if there are multiple independent data chunks in LZMA2 stream.↩
- 7-Zip now can use multi-threading for xz decoding,↩
if there are multiple blocks in xz stream.↩
↩
↩
18.01 2019-01-28↩
-------------------------↩
- The BUG in 17.01 - 18.00 beta was fixed:↩
XzDec.c : random block unpacking and XzUnpacker_IsBlockFinished()↩
didn't work correctly for xz archives without checksum (CRC).↩
↩
↩
18.00 beta 2019-01-10↩
-------------------------↩
- The BUG in xz encoder was fixed:↩
There was memory leak of 16 KB for each file compressed with ↩
xz compression method, if additional filter was used.↩
↩
↩
17.01 beta 2017-08-28↩
-------------------------↩
- Minor speed optimization for LZMA2 (xz and 7z) multi-threading compression.↩
7-Zip now uses additional memory buffers for multi-block LZMA2 compression.↩
CPU utilization was slightly improved.↩
- 7-zip now creates multi-block xz archives by default. Block size can be ↩
specified with -ms[Size]{m|g} switch.↩
- xz decoder now can unpack random block from multi-block xz archives.↩
- 7-Zip command line: @listfile now doesn't work after -- switch.↩
Use -i@listfile before -- switch instead.↩
- The BUGs were fixed:↩
7-Zip 17.00 beta crashed for commands that write anti-item to 7z archive.↩
↩
↩
17.00 beta 2017-04-29↩
-------------------------↩
- NewHandler.h / NewHandler.cpp: ↩
now it redefines operator new() only for old MSVC compilers (_MSC_VER < 1900).↩
- C/7zTypes.h : the names of variables in interface structures were changed (vt).↩
- Some bugs were fixed. 7-Zip could crash in some cases.↩
- Some internal changes in code.↩
↩
↩
16.04 2016-10-04↩
-------------------------↩
- The bug was fixed in DllSecur.c.↩
↩
↩
16.03 2016-09-28↩
-------------------------↩
- SFX modules now use some protection against DLL preloading attack.↩
- Some bugs in 7z code were fixed.↩
↩
↩
16.02 2016-05-21↩
-------------------------↩
- The BUG in 16.00 - 16.01 was fixed:↩
Split Handler (SplitHandler.cpp) returned incorrect ↩
total size value (kpidSize) for split archives.↩
↩
↩
16.01 2016-05-19↩
------------------------- ↩
- Some internal changes to reduce the number of compiler warnings.↩
↩
↩
16.00 2016-05-10↩
------------------------- ↩
- Some bugs were fixed.↩
↩
↩
15.12 2015-11-19↩
------------------------- ↩
- The BUG in C version of 7z decoder was fixed:↩
7zDec.c : SzDecodeLzma2()↩
7z decoder could mistakenly report about decoding error for some 7z archives↩
that use LZMA2 compression method.↩
The probability to get that mistaken decoding error report was about ↩
one error per 16384 solid blocks for solid blocks larger than 16 KB (compressed size). ↩
- The BUG (in 9.26-15.11) in C version of 7z decoder was fixed:↩
7zArcIn.c : SzReadHeader2()↩
7z decoder worked incorrectly for 7z archives that contain ↩
empty solid blocks, that can be placed to 7z archive, if some file is ↩
unavailable for reading during archive creation.↩
↩
↩
15.09 beta 2015-10-16↩
------------------------- ↩
- The BUG in LZMA / LZMA2 encoding code was fixed.↩
The BUG in LzFind.c::MatchFinder_ReadBlock() function.↩
If input data size is larger than (4 GiB - dictionary_size),↩
the following code worked incorrectly:↩
- LZMA : LzmaEnc_MemEncode(), LzmaEncode() : LZMA encoding functions ↩
for compressing from memory to memory. ↩
That BUG is not related to LZMA encoder version that works via streams.↩
- LZMA2 : multi-threaded version of LZMA2 encoder worked incorrectly, if ↩
default value of chunk size (CLzma2EncProps::blockSize) is changed ↩
to value larger than (4 GiB - dictionary_size).↩
↩
↩
9.38 beta 2015-01-03↩
------------------------- ↩
- The BUG in 9.31-9.37 was fixed:↩
IArchiveGetRawProps interface was disabled for 7z archives.↩
- The BUG in 9.26-9.36 was fixed:↩
Some code in CPP\7zip\Archive\7z\ worked correctly only under Windows.↩
↩
↩
9.36 beta 2014-12-26↩
------------------------- ↩
- The BUG in command line version was fixed:↩
7-Zip created temporary archive in current folder during update archive↩
operation, if -w{Path} switch was not specified. ↩
The fixed 7-Zip creates temporary archive in folder that contains updated archive.↩
- The BUG in 9.33-9.35 was fixed:↩
7-Zip silently ignored file reading errors during 7z or gz archive creation,↩
and the created archive contained only part of file that was read before error.↩
The fixed 7-Zip stops archive creation and it reports about error.↩
↩
↩
9.35 beta 2014-12-07↩
------------------------- ↩
- 7zr.exe now support AES encryption.↩
- SFX mudules were added to LZMA SDK↩
- Some bugs were fixed.↩
↩
↩
9.21 beta 2011-04-11↩
------------------------- ↩
- New class FString for file names at file systems.↩
- Speed optimization in CRC code for big-endian CPUs.↩
- The BUG in Lzma2Dec.c was fixed:↩
Lzma2Decode function didn't work.↩
↩
↩
9.18 beta 2010-11-02↩
------------------------- ↩
- New small SFX module for installers (SfxSetup).↩
↩
↩
9.12 beta 2010-03-24↩
-------------------------↩
- The BUG in LZMA SDK 9.* was fixed: LZMA2 codec didn't work,↩
if more than 10 threads were used (or more than 20 threads in some modes).↩
↩
↩
9.11 beta 2010-03-15↩
-------------------------↩
- PPMd compression method support↩
↩
↩
9.09 2009-12-12↩
-------------------------↩
- The bug was fixed:↩
Utf16_To_Utf8 funstions in UTFConvert.cpp and 7zMain.c↩
incorrectly converted surrogate characters (the code >= 0x10000) to UTF-8.↩
- Some bugs were fixed↩
↩
↩
9.06 2009-08-17↩
-------------------------↩
- Some changes in ANSI-C 7z Decoder interfaces.↩
↩
↩
9.04 2009-05-30↩
-------------------------↩
- LZMA2 compression method support↩
- xz format support↩
↩
↩
4.65 2009-02-03↩
-------------------------↩
- Some minor fixes↩
↩
↩
4.63 2008-12-31↩
-------------------------↩
- Some minor fixes↩
↩
↩
4.61 beta 2008-11-23↩
-------------------------↩
- The bug in ANSI-C LZMA Decoder was fixed:↩
If encoded stream was corrupted, decoder could access memory ↩
outside of allocated range.↩
- Some changes in ANSI-C 7z Decoder interfaces.↩
- LZMA SDK is placed in the public domain.↩
↩
↩
4.60 beta 2008-08-19↩
-------------------------↩
- Some minor fixes.↩
↩
↩
4.59 beta 2008-08-13↩
-------------------------↩
- The bug was fixed:↩
LZMA Encoder in fast compression mode could access memory outside of ↩
allocated range in some rare cases.↩
↩
↩
4.58 beta 2008-05-05↩
-------------------------↩
- ANSI-C LZMA Decoder was rewritten for speed optimizations.↩
- ANSI-C LZMA Encoder was included to LZMA SDK.↩
- C++ LZMA code now is just wrapper over ANSI-C code.↩
↩
↩
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↩
-------------------------↩
- The 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↩
-------------------------↩
- The 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↩
- The 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↩
-------------------------↩
- The 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↩
-------------------------↩
- The 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↩
-------------------------↩
- The 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↩
-------------------↩
2001-2008: 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↩