1 HISTORY of the LZMA SDK
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5 -------------------------
10 -------------------------
15 -------------------------
16 - The bug in ANSI-C LZMA Decoder was fixed:
17 If encoded stream was corrupted, decoder could access memory
18 outside of allocated range.
19 - Some changes in ANSI-C 7z Decoder interfaces.
20 - LZMA SDK is placed in the public domain.
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29 -------------------------
31 LZMA Encoder in fast compression mode could access memory outside of
32 allocated range in some rare cases.
36 -------------------------
37 - ANSI-C LZMA Decoder was rewritten for speed optimizations.
38 - ANSI-C LZMA Encoder was included to LZMA SDK.
39 - C++ LZMA code now is just wrapper over ANSI-C code.
43 -------------------------
44 - Speed optimizations in Ñ++ LZMA Decoder.
45 - Small changes for more compatibility with some C/C++ compilers.
49 -------------------------
51 - now it supports BCJ and BCJ2 filters
52 - now it supports files larger than 4 GB.
53 - now it supports "Last Write Time" field for files.
54 - C++ code for .7z archives compressing/decompressing from 7-zip
55 was included to LZMA SDK.
59 -------------------------
60 - Small changes for more compatibility with some C/C++ compilers.
64 -------------------------
65 - Small changes in .h files in ANSI-C version.
69 -------------------------
70 - The bug in versions 4.33b:4.38b was fixed:
71 C++ version of LZMA encoder could not correctly compress
72 files larger than 2 GB with HC4 match finder (-mfhc4).
76 -------------------------
77 - Fixes in C++ code: code could no be compiled if _NO_EXCEPTIONS was defined.
81 -------------------------
82 - The bug was fixed in C++ version of LZMA Decoder:
83 If encoded stream was corrupted, decoder could access memory
84 outside of allocated range.
88 -------------------------
89 - Compressing speed and memory requirements for compressing were increased
90 - LZMA now can use only these match finders: HC4, BT2, BT3, BT4
94 -------------------------
95 - Java version of LZMA SDK was included
99 -------------------------
100 - Compression ratio was improved in -a2 mode
101 - Speed optimizations for compressing in -a2 mode
102 - -fb switch now supports values up to 273
103 - The bug in 7z_C (7zIn.c) was fixed:
104 It used Alloc/Free functions from different memory pools.
105 So if program used two memory pools, it worked incorrectly.
106 - 7z_C: .7z format supporting was improved
107 - LZMA# SDK (C#.NET version) was included
110 4.27 (Updated) 2005-09-21
111 -------------------------
112 - Some GUIDs/interfaces in C++ were changed.
114 ISequentialInStream::Read now works as old ReadPart
115 ISequentialOutStream::Write now works as old WritePart
119 -------------------------
120 - The bug in LzmaDecodeSize.c was fixed:
121 if _LZMA_IN_CB and _LZMA_OUT_READ were defined,
122 decompressing worked incorrectly.
126 -------------------------
127 - Fixes in 7z_C code and LzmaTest.c:
128 previous versions could work incorrectly,
129 if malloc(0) returns 0
133 -------------------------
134 - Small fixes in C++ code
138 -------------------------
143 -------------------------
144 - Interfaces for ANSI-C LZMA Decoder (LzmaDecode.c) were changed
145 - New additional version of ANSI-C LZMA Decoder with zlib-like interface:
149 - ANSI-C LZMA Decoder now can decompress files larger than 4 GB
153 -------------------------
154 - New example for RAM->RAM compressing/decompressing:
155 LZMA + BCJ (filter for x86 code):
160 - -f86 switch for lzma.exe
164 -------------------------
165 - The bug was fixed in LzmaDecode.c (ANSI-C LZMA Decoder):
166 If _LZMA_OUT_READ was defined, and if encoded stream was corrupted,
167 decoder could access memory outside of allocated range.
168 - Speed optimization of ANSI-C LZMA Decoder (now it's about 20% faster).
169 Old version of LZMA Decoder now is in file LzmaDecodeSize.c.
170 LzmaDecodeSize.c can provide slightly smaller code than LzmaDecode.c
171 - Small speed optimization in LZMA C++ code
172 - filter for SPARC's code was added
173 - Simplified version of .7z ANSI-C Decoder was included
177 -------------------------
178 - The bug in v4.05 was fixed:
179 LZMA-Encoder didn't release output stream in some cases.
183 -------------------------
184 - Source code of filters for x86, IA-64, ARM, ARM-Thumb
185 and PowerPC code was included to SDK
186 - Some internal minor changes
190 -------------------------
191 - More compatibility with some C++ compilers
195 -------------------------
196 - "Benchmark" command was added. It measures compressing
197 and decompressing speed and shows rating values.
198 Also it checks hardware errors.
202 -------------------------
203 - C++ LZMA Encoder/Decoder code now is more portable
204 and it can be compiled by GCC on Linux.
208 -------------------------
209 - Some detection of data corruption was enabled.
210 LzmaDecode.c / RangeDecoderReadByte
219 -------------------------
220 - Original version of LZMA SDK
226 2001-2008: Improvements to LZMA compressing/decompressing code,
227 keeping compatibility with original LZMA format
228 1996-2001: Development of LZMA compression format
232 2001-08-30: LZMA compression was added to 7-Zip
233 1999-01-02: First version of 7-Zip was released