1 HISTORY of the LZMA SDK
2 -----------------------
5 -------------------------
6 - Speed optimizations in Ñ++ LZMA Decoder.
7 - Small changes for more compatibility with some C/C++ compilers.
11 -------------------------
13 - now it supports BCJ and BCJ2 filters
14 - now it supports files larger than 4 GB.
15 - now it supports "Last Write Time" field for files.
16 - C++ code for .7z archives compressing/decompressing from 7-zip
17 was included to LZMA SDK.
21 -------------------------
22 - Small changes for more compatibility with some C/C++ compilers.
26 -------------------------
27 - Small changes in .h files in ANSI-C version.
31 -------------------------
32 - Bug in versions 4.33b:4.38b was fixed:
33 C++ version of LZMA encoder could not correctly compress
34 files larger than 2 GB with HC4 match finder (-mfhc4).
38 -------------------------
39 - Fixes in C++ code: code could no be compiled if _NO_EXCEPTIONS was defined.
43 -------------------------
44 - Bug was fixed in C++ version of LZMA Decoder:
45 If encoded stream was corrupted, decoder could access memory
46 outside of allocated range.
50 -------------------------
51 - Compressing speed and memory requirements for compressing were increased
52 - LZMA now can use only these match finders: HC4, BT2, BT3, BT4
56 -------------------------
57 - Java version of LZMA SDK was included
61 -------------------------
62 - Compression ratio was improved in -a2 mode
63 - Speed optimizations for compressing in -a2 mode
64 - -fb switch now supports values up to 273
65 - Bug in 7z_C (7zIn.c) was fixed:
66 It used Alloc/Free functions from different memory pools.
67 So if program used two memory pools, it worked incorrectly.
68 - 7z_C: .7z format supporting was improved
69 - LZMA# SDK (C#.NET version) was included
72 4.27 (Updated) 2005-09-21
73 -------------------------
74 - Some GUIDs/interfaces in C++ were changed.
76 ISequentialInStream::Read now works as old ReadPart
77 ISequentialOutStream::Write now works as old WritePart
81 -------------------------
82 - Bug in LzmaDecodeSize.c was fixed:
83 if _LZMA_IN_CB and _LZMA_OUT_READ were defined,
84 decompressing worked incorrectly.
88 -------------------------
89 - Fixes in 7z_C code and LzmaTest.c:
90 previous versions could work incorrectly,
91 if malloc(0) returns 0
95 -------------------------
96 - Small fixes in C++ code
100 -------------------------
105 -------------------------
106 - Interfaces for ANSI-C LZMA Decoder (LzmaDecode.c) were changed
107 - New additional version of ANSI-C LZMA Decoder with zlib-like interface:
111 - ANSI-C LZMA Decoder now can decompress files larger than 4 GB
115 -------------------------
116 - New example for RAM->RAM compressing/decompressing:
117 LZMA + BCJ (filter for x86 code):
122 - -f86 switch for lzma.exe
126 -------------------------
127 - Bug was fixed in LzmaDecode.c (ANSI-C LZMA Decoder):
128 If _LZMA_OUT_READ was defined, and if encoded stream was corrupted,
129 decoder could access memory outside of allocated range.
130 - Speed optimization of ANSI-C LZMA Decoder (now it's about 20% faster).
131 Old version of LZMA Decoder now is in file LzmaDecodeSize.c.
132 LzmaDecodeSize.c can provide slightly smaller code than LzmaDecode.c
133 - Small speed optimization in LZMA C++ code
134 - filter for SPARC's code was added
135 - Simplified version of .7z ANSI-C Decoder was included
139 -------------------------
140 - Bug in v4.05 was fixed:
141 LZMA-Encoder didn't release output stream in some cases.
145 -------------------------
146 - Source code of filters for x86, IA-64, ARM, ARM-Thumb
147 and PowerPC code was included to SDK
148 - Some internal minor changes
152 -------------------------
153 - More compatibility with some C++ compilers
157 -------------------------
158 - "Benchmark" command was added. It measures compressing
159 and decompressing speed and shows rating values.
160 Also it checks hardware errors.
164 -------------------------
165 - C++ LZMA Encoder/Decoder code now is more portable
166 and it can be compiled by GCC on Linux.
170 -------------------------
171 - Some detection of data corruption was enabled.
172 LzmaDecode.c / RangeDecoderReadByte
181 -------------------------
182 - Original version of LZMA SDK
188 2001-2007: Improvements to LZMA compressing/decompressing code,
189 keeping compatibility with original LZMA format
190 1996-2001: Development of LZMA compression format
194 2001-08-30: LZMA compression was added to 7-Zip
195 1999-01-02: First version of 7-Zip was released