lzma-history.txt (13750B)
1 HISTORY of the LZMA SDK 2 ----------------------- 3 4 19.00 2019-02-21 5 ------------------------- 6 - Encryption strength for 7z archives was increased: 7 the size of random initialization vector was increased from 64-bit to 128-bit, 8 and the pseudo-random number generator was improved. 9 - The bug in 7zIn.c code was fixed. 10 11 12 18.06 2018-12-30 13 ------------------------- 14 - The speed for LZMA/LZMA2 compressing was increased by 3-10%, 15 and there are minor changes in compression ratio. 16 - Some bugs were fixed. 17 - The bug in 7-Zip 18.02-18.05 was fixed: 18 There was memory leak in multithreading xz decoder - XzDecMt_Decode(), 19 if xz stream contains only one block. 20 - The changes for MSVS compiler makefiles: 21 - the makefiles now use "PLATFORM" macroname with values (x64, x86, arm64) 22 instead of "CPU" macroname with values (AMD64, ARM64). 23 - the makefiles by default now use static version of the run-time library. 24 25 26 18.05 2018-04-30 27 ------------------------- 28 - The speed for LZMA/LZMA2 compressing was increased 29 by 8% for fastest/fast compression levels and 30 by 3% for normal/maximum compression levels. 31 - Previous versions of 7-Zip could work incorrectly in "Large memory pages" mode in 32 Windows 10 because of some BUG with "Large Pages" in Windows 10. 33 Now 7-Zip doesn't use "Large Pages" on Windows 10 up to revision 1709 (16299). 34 - The BUG was fixed in Lzma2Enc.c 35 Lzma2Enc_Encode2() function worked incorretly, 36 if (inStream == NULL) and the number of block threads is more than 1. 37 38 39 18.03 beta 2018-03-04 40 ------------------------- 41 - Asm\x86\LzmaDecOpt.asm: new optimized LZMA decoder written in asm 42 for x64 with about 30% higher speed than main version of LZMA decoder written in C. 43 - The speed for single-thread LZMA/LZMA2 decoder written in C was increased by 3%. 44 - 7-Zip now can use multi-threading for 7z/LZMA2 decoding, 45 if there are multiple independent data chunks in LZMA2 stream. 46 - 7-Zip now can use multi-threading for xz decoding, 47 if there are multiple blocks in xz stream. 48 49 50 18.01 2019-01-28 51 ------------------------- 52 - The BUG in 17.01 - 18.00 beta was fixed: 53 XzDec.c : random block unpacking and XzUnpacker_IsBlockFinished() 54 didn't work correctly for xz archives without checksum (CRC). 55 56 57 18.00 beta 2019-01-10 58 ------------------------- 59 - The BUG in xz encoder was fixed: 60 There was memory leak of 16 KB for each file compressed with 61 xz compression method, if additional filter was used. 62 63 64 17.01 beta 2017-08-28 65 ------------------------- 66 - Minor speed optimization for LZMA2 (xz and 7z) multi-threading compression. 67 7-Zip now uses additional memory buffers for multi-block LZMA2 compression. 68 CPU utilization was slightly improved. 69 - 7-zip now creates multi-block xz archives by default. Block size can be 70 specified with -ms[Size]{m|g} switch. 71 - xz decoder now can unpack random block from multi-block xz archives. 72 - 7-Zip command line: @listfile now doesn't work after -- switch. 73 Use -i@listfile before -- switch instead. 74 - The BUGs were fixed: 75 7-Zip 17.00 beta crashed for commands that write anti-item to 7z archive. 76 77 78 17.00 beta 2017-04-29 79 ------------------------- 80 - NewHandler.h / NewHandler.cpp: 81 now it redefines operator new() only for old MSVC compilers (_MSC_VER < 1900). 82 - C/7zTypes.h : the names of variables in interface structures were changed (vt). 83 - Some bugs were fixed. 7-Zip could crash in some cases. 84 - Some internal changes in code. 85 86 87 16.04 2016-10-04 88 ------------------------- 89 - The bug was fixed in DllSecur.c. 90 91 92 16.03 2016-09-28 93 ------------------------- 94 - SFX modules now use some protection against DLL preloading attack. 95 - Some bugs in 7z code were fixed. 96 97 98 16.02 2016-05-21 99 ------------------------- 100 - The BUG in 16.00 - 16.01 was fixed: 101 Split Handler (SplitHandler.cpp) returned incorrect 102 total size value (kpidSize) for split archives. 103 104 105 16.01 2016-05-19 106 ------------------------- 107 - Some internal changes to reduce the number of compiler warnings. 108 109 110 16.00 2016-05-10 111 ------------------------- 112 - Some bugs were fixed. 113 114 115 15.12 2015-11-19 116 ------------------------- 117 - The BUG in C version of 7z decoder was fixed: 118 7zDec.c : SzDecodeLzma2() 119 7z decoder could mistakenly report about decoding error for some 7z archives 120 that use LZMA2 compression method. 121 The probability to get that mistaken decoding error report was about 122 one error per 16384 solid blocks for solid blocks larger than 16 KB (compressed size). 123 - The BUG (in 9.26-15.11) in C version of 7z decoder was fixed: 124 7zArcIn.c : SzReadHeader2() 125 7z decoder worked incorrectly for 7z archives that contain 126 empty solid blocks, that can be placed to 7z archive, if some file is 127 unavailable for reading during archive creation. 128 129 130 15.09 beta 2015-10-16 131 ------------------------- 132 - The BUG in LZMA / LZMA2 encoding code was fixed. 133 The BUG in LzFind.c::MatchFinder_ReadBlock() function. 134 If input data size is larger than (4 GiB - dictionary_size), 135 the following code worked incorrectly: 136 - LZMA : LzmaEnc_MemEncode(), LzmaEncode() : LZMA encoding functions 137 for compressing from memory to memory. 138 That BUG is not related to LZMA encoder version that works via streams. 139 - LZMA2 : multi-threaded version of LZMA2 encoder worked incorrectly, if 140 default value of chunk size (CLzma2EncProps::blockSize) is changed 141 to value larger than (4 GiB - dictionary_size). 142 143 144 9.38 beta 2015-01-03 145 ------------------------- 146 - The BUG in 9.31-9.37 was fixed: 147 IArchiveGetRawProps interface was disabled for 7z archives. 148 - The BUG in 9.26-9.36 was fixed: 149 Some code in CPP\7zip\Archive\7z\ worked correctly only under Windows. 150 151 152 9.36 beta 2014-12-26 153 ------------------------- 154 - The BUG in command line version was fixed: 155 7-Zip created temporary archive in current folder during update archive 156 operation, if -w{Path} switch was not specified. 157 The fixed 7-Zip creates temporary archive in folder that contains updated archive. 158 - The BUG in 9.33-9.35 was fixed: 159 7-Zip silently ignored file reading errors during 7z or gz archive creation, 160 and the created archive contained only part of file that was read before error. 161 The fixed 7-Zip stops archive creation and it reports about error. 162 163 164 9.35 beta 2014-12-07 165 ------------------------- 166 - 7zr.exe now support AES encryption. 167 - SFX mudules were added to LZMA SDK 168 - Some bugs were fixed. 169 170 171 9.21 beta 2011-04-11 172 ------------------------- 173 - New class FString for file names at file systems. 174 - Speed optimization in CRC code for big-endian CPUs. 175 - The BUG in Lzma2Dec.c was fixed: 176 Lzma2Decode function didn't work. 177 178 179 9.18 beta 2010-11-02 180 ------------------------- 181 - New small SFX module for installers (SfxSetup). 182 183 184 9.12 beta 2010-03-24 185 ------------------------- 186 - The BUG in LZMA SDK 9.* was fixed: LZMA2 codec didn't work, 187 if more than 10 threads were used (or more than 20 threads in some modes). 188 189 190 9.11 beta 2010-03-15 191 ------------------------- 192 - PPMd compression method support 193 194 195 9.09 2009-12-12 196 ------------------------- 197 - The bug was fixed: 198 Utf16_To_Utf8 funstions in UTFConvert.cpp and 7zMain.c 199 incorrectly converted surrogate characters (the code >= 0x10000) to UTF-8. 200 - Some bugs were fixed 201 202 203 9.06 2009-08-17 204 ------------------------- 205 - Some changes in ANSI-C 7z Decoder interfaces. 206 207 208 9.04 2009-05-30 209 ------------------------- 210 - LZMA2 compression method support 211 - xz format support 212 213 214 4.65 2009-02-03 215 ------------------------- 216 - Some minor fixes 217 218 219 4.63 2008-12-31 220 ------------------------- 221 - Some minor fixes 222 223 224 4.61 beta 2008-11-23 225 ------------------------- 226 - The bug in ANSI-C LZMA Decoder was fixed: 227 If encoded stream was corrupted, decoder could access memory 228 outside of allocated range. 229 - Some changes in ANSI-C 7z Decoder interfaces. 230 - LZMA SDK is placed in the public domain. 231 232 233 4.60 beta 2008-08-19 234 ------------------------- 235 - Some minor fixes. 236 237 238 4.59 beta 2008-08-13 239 ------------------------- 240 - The bug was fixed: 241 LZMA Encoder in fast compression mode could access memory outside of 242 allocated range in some rare cases. 243 244 245 4.58 beta 2008-05-05 246 ------------------------- 247 - ANSI-C LZMA Decoder was rewritten for speed optimizations. 248 - ANSI-C LZMA Encoder was included to LZMA SDK. 249 - C++ LZMA code now is just wrapper over ANSI-C code. 250 251 252 4.57 2007-12-12 253 ------------------------- 254 - Speed optimizations in Ñ++ LZMA Decoder. 255 - Small changes for more compatibility with some C/C++ compilers. 256 257 258 4.49 beta 2007-07-05 259 ------------------------- 260 - .7z ANSI-C Decoder: 261 - now it supports BCJ and BCJ2 filters 262 - now it supports files larger than 4 GB. 263 - now it supports "Last Write Time" field for files. 264 - C++ code for .7z archives compressing/decompressing from 7-zip 265 was included to LZMA SDK. 266 267 268 4.43 2006-06-04 269 ------------------------- 270 - Small changes for more compatibility with some C/C++ compilers. 271 272 273 4.42 2006-05-15 274 ------------------------- 275 - Small changes in .h files in ANSI-C version. 276 277 278 4.39 beta 2006-04-14 279 ------------------------- 280 - The bug in versions 4.33b:4.38b was fixed: 281 C++ version of LZMA encoder could not correctly compress 282 files larger than 2 GB with HC4 match finder (-mfhc4). 283 284 285 4.37 beta 2005-04-06 286 ------------------------- 287 - Fixes in C++ code: code could no be compiled if _NO_EXCEPTIONS was defined. 288 289 290 4.35 beta 2005-03-02 291 ------------------------- 292 - The bug was fixed in C++ version of LZMA Decoder: 293 If encoded stream was corrupted, decoder could access memory 294 outside of allocated range. 295 296 297 4.34 beta 2006-02-27 298 ------------------------- 299 - Compressing speed and memory requirements for compressing were increased 300 - LZMA now can use only these match finders: HC4, BT2, BT3, BT4 301 302 303 4.32 2005-12-09 304 ------------------------- 305 - Java version of LZMA SDK was included 306 307 308 4.30 2005-11-20 309 ------------------------- 310 - Compression ratio was improved in -a2 mode 311 - Speed optimizations for compressing in -a2 mode 312 - -fb switch now supports values up to 273 313 - The bug in 7z_C (7zIn.c) was fixed: 314 It used Alloc/Free functions from different memory pools. 315 So if program used two memory pools, it worked incorrectly. 316 - 7z_C: .7z format supporting was improved 317 - LZMA# SDK (C#.NET version) was included 318 319 320 4.27 (Updated) 2005-09-21 321 ------------------------- 322 - Some GUIDs/interfaces in C++ were changed. 323 IStream.h: 324 ISequentialInStream::Read now works as old ReadPart 325 ISequentialOutStream::Write now works as old WritePart 326 327 328 4.27 2005-08-07 329 ------------------------- 330 - The bug in LzmaDecodeSize.c was fixed: 331 if _LZMA_IN_CB and _LZMA_OUT_READ were defined, 332 decompressing worked incorrectly. 333 334 335 4.26 2005-08-05 336 ------------------------- 337 - Fixes in 7z_C code and LzmaTest.c: 338 previous versions could work incorrectly, 339 if malloc(0) returns 0 340 341 342 4.23 2005-06-29 343 ------------------------- 344 - Small fixes in C++ code 345 346 347 4.22 2005-06-10 348 ------------------------- 349 - Small fixes 350 351 352 4.21 2005-06-08 353 ------------------------- 354 - Interfaces for ANSI-C LZMA Decoder (LzmaDecode.c) were changed 355 - New additional version of ANSI-C LZMA Decoder with zlib-like interface: 356 - LzmaStateDecode.h 357 - LzmaStateDecode.c 358 - LzmaStateTest.c 359 - ANSI-C LZMA Decoder now can decompress files larger than 4 GB 360 361 362 4.17 2005-04-18 363 ------------------------- 364 - New example for RAM->RAM compressing/decompressing: 365 LZMA + BCJ (filter for x86 code): 366 - LzmaRam.h 367 - LzmaRam.cpp 368 - LzmaRamDecode.h 369 - LzmaRamDecode.c 370 - -f86 switch for lzma.exe 371 372 373 4.16 2005-03-29 374 ------------------------- 375 - The bug was fixed in LzmaDecode.c (ANSI-C LZMA Decoder): 376 If _LZMA_OUT_READ was defined, and if encoded stream was corrupted, 377 decoder could access memory outside of allocated range. 378 - Speed optimization of ANSI-C LZMA Decoder (now it's about 20% faster). 379 Old version of LZMA Decoder now is in file LzmaDecodeSize.c. 380 LzmaDecodeSize.c can provide slightly smaller code than LzmaDecode.c 381 - Small speed optimization in LZMA C++ code 382 - filter for SPARC's code was added 383 - Simplified version of .7z ANSI-C Decoder was included 384 385 386 4.06 2004-09-05 387 ------------------------- 388 - The bug in v4.05 was fixed: 389 LZMA-Encoder didn't release output stream in some cases. 390 391 392 4.05 2004-08-25 393 ------------------------- 394 - Source code of filters for x86, IA-64, ARM, ARM-Thumb 395 and PowerPC code was included to SDK 396 - Some internal minor changes 397 398 399 4.04 2004-07-28 400 ------------------------- 401 - More compatibility with some C++ compilers 402 403 404 4.03 2004-06-18 405 ------------------------- 406 - "Benchmark" command was added. It measures compressing 407 and decompressing speed and shows rating values. 408 Also it checks hardware errors. 409 410 411 4.02 2004-06-10 412 ------------------------- 413 - C++ LZMA Encoder/Decoder code now is more portable 414 and it can be compiled by GCC on Linux. 415 416 417 4.01 2004-02-15 418 ------------------------- 419 - Some detection of data corruption was enabled. 420 LzmaDecode.c / RangeDecoderReadByte 421 ..... 422 { 423 rd->ExtraBytes = 1; 424 return 0xFF; 425 } 426 427 428 4.00 2004-02-13 429 ------------------------- 430 - Original version of LZMA SDK 431 432 433 434 HISTORY of the LZMA 435 ------------------- 436 2001-2008: Improvements to LZMA compressing/decompressing code, 437 keeping compatibility with original LZMA format 438 1996-2001: Development of LZMA compression format 439 440 Some milestones: 441 442 2001-08-30: LZMA compression was added to 7-Zip 443 1999-01-02: First version of 7-Zip was released 444 445 446 End of document