BaseTools/Source/C/LzmaCompress/Sdk/DOC/lzma-history.txt

   1 HISTORY of the LZMA SDK
   2 -----------------------
   3
   4 18.05          2018-04-30
   5 -------------------------
   6 - The speed for LZMA/LZMA2 compressing was increased
   7     by 8% for fastest/fast compression levels and
   8     by 3% for normal/maximum compression levels.
   9 - Previous versions of 7-Zip could work incorrectly in "Large memory pages" mode in
  10   Windows 10 because of some BUG with "Large Pages" in Windows 10.
  11   Now 7-Zip doesn't use "Large Pages" on Windows 10 up to revision 1709 (16299).
  12 - The BUG was fixed in Lzma2Enc.c
  13     Lzma2Enc_Encode2() function worked incorretly,
  14       if (inStream == NULL) and the number of block threads is more than 1.
  15
  16
  17 18.03 beta     2018-03-04
  18 -------------------------
  19 - Asm\x86\LzmaDecOpt.asm: new optimized LZMA decoder written in asm
  20   for x64 with about 30% higher speed than main version of LZMA decoder written in C.
  21 - The speed for single-thread LZMA/LZMA2 decoder written in C was increased by 3%.
  22 - 7-Zip now can use multi-threading for 7z/LZMA2 decoding,
  23   if there are multiple independent data chunks in LZMA2 stream.
  24 - 7-Zip now can use multi-threading for xz decoding,
  25   if there are multiple blocks in xz stream.
  26
  27
  28 18.01          2019-01-28
  29 -------------------------
  30 - The BUG in 17.01 - 18.00 beta was fixed:
  31   XzDec.c : random block unpacking and XzUnpacker_IsBlockFinished()
  32   didn't work correctly for xz archives without checksum (CRC).
  33
  34
  35 18.00 beta     2019-01-10
  36 -------------------------
  37 - The BUG in xz encoder was fixed:
  38   There was memory leak of 16 KB for each file compressed with
  39   xz compression method, if additional filter was used.
  40
  41
  42 17.01 beta     2017-08-28
  43 -------------------------
  44 - Minor speed optimization for LZMA2 (xz and 7z) multi-threading compression.
  45   7-Zip now uses additional memory buffers for multi-block LZMA2 compression.
  46   CPU utilization was slightly improved.
  47 - 7-zip now creates multi-block xz archives by default. Block size can be
  48   specified with -ms[Size]{m|g} switch.
  49 - xz decoder now can unpack random block from multi-block xz archives.
  50 - 7-Zip command line: @listfile now doesn't work after -- switch.
  51   Use -i@listfile before -- switch instead.
  52 - The BUGs were fixed:
  53   7-Zip 17.00 beta crashed for commands that write anti-item to 7z archive.
  54
  55
  56 17.00 beta     2017-04-29
  57 -------------------------
  58 - NewHandler.h / NewHandler.cpp:
  59     now it redefines operator new() only for old MSVC compilers (_MSC_VER < 1900).
  60 - C/7zTypes.h : the names of variables in interface structures were changed (vt).
  61 - Some bugs were fixed. 7-Zip could crash in some cases.
  62 - Some internal changes in code.
  63
  64
  65 16.04          2016-10-04
  66 -------------------------
  67 - The bug was fixed in DllSecur.c.
  68
  69
  70 16.03          2016-09-28
  71 -------------------------
  72 - SFX modules now use some protection against DLL preloading attack.
  73 - Some bugs in 7z code were fixed.
  74
  75
  76 16.02          2016-05-21
  77 -------------------------
  78 - The BUG in 16.00 - 16.01 was fixed:
  79   Split Handler (SplitHandler.cpp) returned incorrect
  80   total size value (kpidSize) for split archives.
  81
  82
  83 16.01          2016-05-19
  84 -------------------------
  85 - Some internal changes to reduce the number of compiler warnings.
  86
  87
  88 16.00          2016-05-10
  89 -------------------------
  90 - Some bugs were fixed.
  91
  92
  93 15.12          2015-11-19
  94 -------------------------
  95 - The BUG in C version of 7z decoder was fixed:
  96   7zDec.c : SzDecodeLzma2()
  97   7z decoder could mistakenly report about decoding error for some 7z archives
  98   that use LZMA2 compression method.
  99   The probability to get that mistaken decoding error report was about
 100   one error per 16384 solid blocks for solid blocks larger than 16 KB (compressed size).
 101 - The BUG (in 9.26-15.11) in C version of 7z decoder was fixed:
 102   7zArcIn.c : SzReadHeader2()
 103   7z decoder worked incorrectly for 7z archives that contain
 104   empty solid blocks, that can be placed to 7z archive, if some file is
 105   unavailable for reading during archive creation.
 106
 107
 108 15.09 beta     2015-10-16
 109 -------------------------
 110 - The BUG in LZMA / LZMA2 encoding code was fixed.
 111   The BUG in LzFind.c::MatchFinder_ReadBlock() function.
 112   If input data size is larger than (4 GiB - dictionary_size),
 113   the following code worked incorrectly:
 114   -  LZMA : LzmaEnc_MemEncode(), LzmaEncode() : LZMA encoding functions
 115      for compressing from memory to memory.
 116      That BUG is not related to LZMA encoder version that works via streams.
 117   -  LZMA2 : multi-threaded version of LZMA2 encoder worked incorrectly, if
 118      default value of chunk size (CLzma2EncProps::blockSize) is changed
 119      to value larger than (4 GiB - dictionary_size).
 120
 121
 122 9.38 beta      2015-01-03
 123 -------------------------
 124 - The BUG in 9.31-9.37 was fixed:
 125   IArchiveGetRawProps interface was disabled for 7z archives.
 126 - The BUG in 9.26-9.36 was fixed:
 127   Some code in CPP\7zip\Archive\7z\ worked correctly only under Windows.
 128
 129
 130 9.36 beta      2014-12-26
 131 -------------------------
 132 - The BUG in command line version was fixed:
 133   7-Zip created temporary archive in current folder during update archive
 134   operation, if -w{Path} switch was not specified.
 135   The fixed 7-Zip creates temporary archive in folder that contains updated archive.
 136 - The BUG in 9.33-9.35 was fixed:
 137   7-Zip silently ignored file reading errors during 7z or gz archive creation,
 138   and the created archive contained only part of file that was read before error.
 139   The fixed 7-Zip stops archive creation and it reports about error.
 140
 141
 142 9.35 beta      2014-12-07
 143 -------------------------
 144 - 7zr.exe now support AES encryption.
 145 - SFX modules were added to LZMA SDK
 146 - Some bugs were fixed.
 147
 148
 149 9.21 beta      2011-04-11
 150 -------------------------
 151 - New class FString for file names at file systems.
 152 - Speed optimization in CRC code for big-endian CPUs.
 153 - The BUG in Lzma2Dec.c was fixed:
 154     Lzma2Decode function didn't work.
 155
 156
 157 9.18 beta      2010-11-02
 158 -------------------------
 159 - New small SFX module for installers (SfxSetup).
 160
 161
 162 9.12 beta      2010-03-24
 163 -------------------------
 164 - The BUG in LZMA SDK 9.* was fixed: LZMA2 codec didn't work,
 165   if more than 10 threads were used (or more than 20 threads in some modes).
 166
 167
 168 9.11 beta      2010-03-15
 169 -------------------------
 170 - PPMd compression method support
 171
 172
 173 9.09           2009-12-12
 174 -------------------------
 175 - The bug was fixed:
 176    Utf16_To_Utf8 funstions in UTFConvert.cpp and 7zMain.c
 177    incorrectly converted surrogate characters (the code >= 0x10000) to UTF-8.
 178 - Some bugs were fixed
 179
 180
 181 9.06           2009-08-17
 182 -------------------------
 183 - Some changes in ANSI-C 7z Decoder interfaces.
 184
 185
 186 9.04           2009-05-30
 187 -------------------------
 188 - LZMA2 compression method support
 189 - xz format support
 190
 191
 192 4.65           2009-02-03
 193 -------------------------
 194 - Some minor fixes
 195
 196
 197 4.63           2008-12-31
 198 -------------------------
 199 - Some minor fixes
 200
 201
 202 4.61 beta      2008-11-23
 203 -------------------------
 204 - The bug in ANSI-C LZMA Decoder was fixed:
 205     If encoded stream was corrupted, decoder could access memory
 206     outside of allocated range.
 207 - Some changes in ANSI-C 7z Decoder interfaces.
 208 - LZMA SDK is placed in the public domain.
 209
 210
 211 4.60 beta      2008-08-19
 212 -------------------------
 213 - Some minor fixes.
 214
 215
 216 4.59 beta      2008-08-13
 217 -------------------------
 218 - The bug was fixed:
 219     LZMA Encoder in fast compression mode could access memory outside of
 220     allocated range in some rare cases.
 221
 222
 223 4.58 beta      2008-05-05
 224 -------------------------
 225 - ANSI-C LZMA Decoder was rewritten for speed optimizations.
 226 - ANSI-C LZMA Encoder was included to LZMA SDK.
 227 - C++ LZMA code now is just wrapper over ANSI-C code.
 228
 229
 230 4.57           2007-12-12
 231 -------------------------
 232 - Speed optimizations in ?++ LZMA Decoder.
 233 - Small changes for more compatibility with some C/C++ compilers.
 234
 235
 236 4.49 beta      2007-07-05
 237 -------------------------
 238 - .7z ANSI-C Decoder:
 239      - now it supports BCJ and BCJ2 filters
 240      - now it supports files larger than 4 GB.
 241      - now it supports "Last Write Time" field for files.
 242 - C++ code for .7z archives compressing/decompressing from 7-zip
 243   was included to LZMA SDK.
 244
 245
 246 4.43           2006-06-04
 247 -------------------------
 248 - Small changes for more compatibility with some C/C++ compilers.
 249
 250
 251 4.42           2006-05-15
 252 -------------------------
 253 - Small changes in .h files in ANSI-C version.
 254
 255
 256 4.39 beta      2006-04-14
 257 -------------------------
 258 - The bug in versions 4.33b:4.38b was fixed:
 259   C++ version of LZMA encoder could not correctly compress
 260   files larger than 2 GB with HC4 match finder (-mfhc4).
 261
 262
 263 4.37 beta      2005-04-06
 264 -------------------------
 265 - Fixes in C++ code: code could no be compiled if _NO_EXCEPTIONS was defined.
 266
 267
 268 4.35 beta      2005-03-02
 269 -------------------------
 270 - The bug was fixed in C++ version of LZMA Decoder:
 271     If encoded stream was corrupted, decoder could access memory
 272     outside of allocated range.
 273
 274
 275 4.34 beta      2006-02-27
 276 -------------------------
 277 - Compressing speed and memory requirements for compressing were increased
 278 - LZMA now can use only these match finders: HC4, BT2, BT3, BT4
 279
 280
 281 4.32           2005-12-09
 282 -------------------------
 283 - Java version of LZMA SDK was included
 284
 285
 286 4.30           2005-11-20
 287 -------------------------
 288 - Compression ratio was improved in -a2 mode
 289 - Speed optimizations for compressing in -a2 mode
 290 - -fb switch now supports values up to 273
 291 - The bug in 7z_C (7zIn.c) was fixed:
 292   It used Alloc/Free functions from different memory pools.
 293   So if program used two memory pools, it worked incorrectly.
 294 - 7z_C: .7z format supporting was improved
 295 - LZMA# SDK (C#.NET version) was included
 296
 297
 298 4.27 (Updated) 2005-09-21
 299 -------------------------
 300 - Some GUIDs/interfaces in C++ were changed.
 301  IStream.h:
 302    ISequentialInStream::Read now works as old ReadPart
 303    ISequentialOutStream::Write now works as old WritePart
 304
 305
 306 4.27           2005-08-07
 307 -------------------------
 308 - The bug in LzmaDecodeSize.c was fixed:
 309    if _LZMA_IN_CB and _LZMA_OUT_READ were defined,
 310    decompressing worked incorrectly.
 311
 312
 313 4.26           2005-08-05
 314 -------------------------
 315 - Fixes in 7z_C code and LzmaTest.c:
 316   previous versions could work incorrectly,
 317   if malloc(0) returns 0
 318
 319
 320 4.23           2005-06-29
 321 -------------------------
 322 - Small fixes in C++ code
 323
 324
 325 4.22           2005-06-10
 326 -------------------------
 327 - Small fixes
 328
 329
 330 4.21           2005-06-08
 331 -------------------------
 332 - Interfaces for ANSI-C LZMA Decoder (LzmaDecode.c) were changed
 333 - New additional version of ANSI-C LZMA Decoder with zlib-like interface:
 334     - LzmaStateDecode.h
 335     - LzmaStateDecode.c
 336     - LzmaStateTest.c
 337 - ANSI-C LZMA Decoder now can decompress files larger than 4 GB
 338
 339
 340 4.17           2005-04-18
 341 -------------------------
 342 - New example for RAM->RAM compressing/decompressing:
 343   LZMA + BCJ (filter for x86 code):
 344     - LzmaRam.h
 345     - LzmaRam.cpp
 346     - LzmaRamDecode.h
 347     - LzmaRamDecode.c
 348     - -f86 switch for lzma.exe
 349
 350
 351 4.16           2005-03-29
 352 -------------------------
 353 - The bug was fixed in LzmaDecode.c (ANSI-C LZMA Decoder):
 354    If _LZMA_OUT_READ was defined, and if encoded stream was corrupted,
 355    decoder could access memory outside of allocated range.
 356 - Speed optimization of ANSI-C LZMA Decoder (now it's about 20% faster).
 357   Old version of LZMA Decoder now is in file LzmaDecodeSize.c.
 358   LzmaDecodeSize.c can provide slightly smaller code than LzmaDecode.c
 359 - Small speed optimization in LZMA C++ code
 360 - filter for SPARC's code was added
 361 - Simplified version of .7z ANSI-C Decoder was included
 362
 363
 364 4.06           2004-09-05
 365 -------------------------
 366 - The bug in v4.05 was fixed:
 367     LZMA-Encoder didn't release output stream in some cases.
 368
 369
 370 4.05           2004-08-25
 371 -------------------------
 372 - Source code of filters for x86, IA-64, ARM, ARM-Thumb
 373   and PowerPC code was included to SDK
 374 - Some internal minor changes
 375
 376
 377 4.04           2004-07-28
 378 -------------------------
 379 - More compatibility with some C++ compilers
 380
 381
 382 4.03           2004-06-18
 383 -------------------------
 384 - "Benchmark" command was added. It measures compressing
 385   and decompressing speed and shows rating values.
 386   Also it checks hardware errors.
 387
 388
 389 4.02           2004-06-10
 390 -------------------------
 391 - C++ LZMA Encoder/Decoder code now is more portable
 392   and it can be compiled by GCC on Linux.
 393
 394
 395 4.01           2004-02-15
 396 -------------------------
 397 - Some detection of data corruption was enabled.
 398     LzmaDecode.c / RangeDecoderReadByte
 399     .....
 400     {
 401       rd->ExtraBytes = 1;
 402       return 0xFF;
 403     }
 404
 405
 406 4.00           2004-02-13
 407 -------------------------
 408 - Original version of LZMA SDK
 409
 410
 411
 412 HISTORY of the LZMA
 413 -------------------
 414   2001-2008:  Improvements to LZMA compressing/decompressing code,
 415               keeping compatibility with original LZMA format
 416   1996-2001:  Development of LZMA compression format
 417
 418   Some milestones:
 419
 420   2001-08-30: LZMA compression was added to 7-Zip
 421   1999-01-02: First version of 7-Zip was released
 422
 423
 424 End of document