AuroraMiddleware/zstd
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235 Commits

Author SHA1 Message Date
Yann Collet
0819abe3c1 added ZSTD_createDDict_byReference() body 2016-12-21 19:25:15 +01:00
Yann Collet
4e5eea61a8 added ZSTD_createDDict_byReference() 2016-12-21 16:44:35 +01:00
Nick Terrell
8157a4c3cc Fix dictionary loading bug causing an MSAN failure 
Offset rep codes must be in the range `[1, dictSize)`.
Fix dictionary loading to reject `0` as a offset rep code.
 2016-12-20 10:47:52 -08:00
Yann Collet
35168679bd Merge pull request #478 from terrelln/wildcopy-ub 
Fix execSequence wildcopy undefined behavior
 2016-12-13 11:33:00 +01:00
Nick Terrell
064a143520 Fix execSequence wildcopy undefined behavior 
execSequence relied on pointer overflow to handle cases where
`sequence.matchLength < 8`.  Instead of passing an `size_t` to
wildcopy, pass a `ptrdiff_t`.
 2016-12-12 19:01:23 -08:00
Nick Terrell
e474aa55b4 Fix decompression buffer overrun 
Allows an adversary to write up to 3 bytes beyond the end of the buffer.
Occurs if the match overlaps the `extDict` and `currentPrefix`, and the
match length in the `currentPrefix` is less than `MINMATCH`, and
`op-(16-MINMATCH) >= oMatchEnd > op-16`.
 2016-12-12 18:05:30 -08:00
Yann Collet
825dffbc43 moved zbuff source files into lib/deprecated 2016-12-05 19:28:19 -08:00
Yann Collet
8f8e2b0b4a fixed initialization warning 2016-12-05 18:00:50 -08:00
Yann Collet
e7a41a5955 added : dictID retrieval functions. 
added : unit tests for dictID retrieval functions
 2016-12-05 16:21:06 -08:00
Yann Collet
9ffbeea875 API : changed : streaming decompression : implicit reset on starting new frames 2016-12-02 18:37:38 -08:00
Yann Collet
2238312c2f fix dict loading 2016-12-02 11:36:11 -08:00
Yann Collet
b89af20353 reduced table sizes for HUF_readDTableX4 2016-12-01 18:24:59 -08:00
Yann Collet
ff504de391 minor decompression speed improvement 2016-11-29 17:42:46 -08:00
Yann Collet
a56ac2815c restored normal decoder speed 2016-11-29 15:30:23 -08:00
Yann Collet
37870d7a66 fixed minor visual warning 2016-11-29 14:31:57 -08:00
Yann Collet
4f5350f610 long matches support overflow 2016-11-29 13:12:24 -08:00
Yann Collet
52e136ed3d long decoder compatible with round and separate buffers 2016-11-28 19:59:11 -08:00
Yann Collet
ce3527ca0c combined normal and long decoder 2016-11-28 18:38:52 -08:00
Yann Collet
8993bee997 restored normal mode 2016-11-28 16:11:30 -08:00
Yann Collet
764e70a4f3 added decodeSequencesLong 2016-11-28 15:50:16 -08:00
Yann Collet
73f88a66f1 added prefetch 2016-11-23 15:43:30 -08:00
Yann Collet
50524bf0da delayed decompression 2016-11-23 15:11:07 -08:00
Nick Terrell
4359d21ad7 Merge two memset() calls into one 2016-11-14 17:52:51 -08:00
Nick Terrell
24701de877 Fix uninitialized memory read 2016-11-14 13:57:05 -08:00
Yann Collet
179b19776f fileio.c does no longer need ZSTD_LEGACY_SUPPORT, and does no longer depend on zstd_legacy.h 
Added : ZSTD_isFrame() in experimental section
 2016-11-02 17:30:49 -07:00
Yann Collet
31e660e7aa more accurate default maximum window size 2016-10-29 03:56:45 -07:00
Yann Collet
2115724c22 Merge pull request #430 from terrelln/exec-sequences 
ZSTD_execSequence() accepts match in last 7 bytes
 2016-10-28 10:45:05 -07:00
Nick Terrell
10bfd0c0d5 Fix ZSTD_execSequence() performance regression 
Commit ae1cb3b3d0 caused the regression.
It is an instruction alignment issue, because if it is `U64 i` instead
of `U32 i`, the regression returns.  This patch fixes the regression
in gcc, but only gets some of the clang performance back.

Benchmarks:
Run on `silesia.tar`.  I only show levels 1-5 because the performance
regression was uniform across all levels.  I did one run on levels
1-19 and it looked good.

| Build | Level | Before | While | After |
|-------|-------|-------:|------:|------:|
| gcc   |     1 |  931.4 | 904.4 | 932.8 |
| gcc   |     2 |  849.1 | 822.6 | 851.2 |
| gcc   |     3 |  815.6 | 790.6 | 818.9 |
| gcc   |     4 |  794.1 | 770.7 | 798.0 |
| gcc   |     5 |  785.7 | 760.7 | 788.8 |
| clang |     1 |  705.5 | 683.2 | 693.8 |
| clang |     2 |  670.0 | 649.2 | 660.7 |
| clang |     3 |  659.6 | 639.8 | 651.4 |
| clang |     4 |  652.5 | 634.7 | 645.9 |
| clang |     5 |  646.9 | 625.5 | 637.7 |
 2016-10-27 16:19:57 -07:00
Nick Terrell
eb7873a048 ZSTD_execSequence() accepts match in last 7 bytes 
The zstd reference compressor will not emit a match in the last 7
bytes of a block.  The decompressor will also not accept a match
in the last 7 bytes.  This patch makes the decompressor accept a
match in the last 7 bytes.
 2016-10-25 21:24:15 -07:00
Yann Collet
335ad5d4d4 added ZSTD_initDStream_usingDDict() . 
slightly optimized ZSTD_initDStream() when no dictionary .
fixed ZSTD_sizeof_CStream() .
 2016-10-25 17:47:02 -07:00
Nick Terrell
f698ad6deb Merge remote-tracking branch 'upstream/dev' into fixes 
* upstream/dev:
  added doc\zstd_manual.html
  added contrib\gen_html
  zstd_compression_format.md moved to doc/
  Fix small bug in ZSTD_execSequence()
  improved ZSTD_compressBlock_opt_extDict_generic
  protect ZSTD_decodeFrameHeader() from invalid usage, as suggested by @spaskob
  zstd_opt.h: small improvement in compression ratio
  improved dicitonary segment merge
  use implicit rules to compile zstd_decompress.c
  detect early impossible decompression scenario in legacy decoder v0.5
  no repeat mode in legacy v0.5
  fixed invalid invocation of dictionary in legacy decoder v0.5
  fix edge case
  fix command line interpretation
  fixed minor corner case
  zstd.h: added the Introduction section
  fixed clang 3.5 warnings
  zstd.h: updated comments
 2016-10-24 13:10:13 -07:00
Yann Collet
4239a207dd Merge pull request #425 from inikep/dev11 
Doc
 2016-10-24 11:11:40 -07:00
Przemyslaw Skibinski
3ee94a7600 zstd_compression_format.md moved to doc/ 2016-10-24 15:58:07 +02:00
Yann Collet
97611611a3 Merge pull request #423 from terrelln/exec-seq-patch 
Fix small bug in ZSTD_execSequence()
 2016-10-21 17:02:06 -07:00
Nick Terrell
ae1cb3b3d0 Fix small bug in ZSTD_execSequence() 
`memmove(op, match, sequence.matchLength)` is not the desired behavior.
Overlap is allowed, and handled as if we did `*op++ = *match++`, which
is not how `memmove()` handles overlap.

Only triggered if both of the following conditions are met:
* The match spans extDict & currentPrefixSegment
* `oLitEnd <= oend_w < oLitEnd + length1 < oMatchEnd <= oend`.

These two conditions imply that the block is less than 15 bytes long.
This bug isn't triggered by the streaming API, because it allocates
enough space for the window size + the block size, so there cannot be
a match that is within 8 bytes of the end and overlaps with itself.
It cannot be triggered by the block decompression API because all of
the decompressed data is in the currentPrefixSegment.

Introduced by commit 7158584399
 2016-10-21 12:13:44 -07:00
Yann Collet
da3bd8b6de protect ZSTD_decodeFrameHeader() from invalid usage, as suggested by @spaskob 2016-10-20 20:11:00 -07:00
Nick Terrell
bb68062c59 Unitialized memory read in ZSTD_decodeSeqHeaders() 
Caused by two things:
1. Not checking that `ip` is in range except for the first byte.
2. `ZSTDv0{5,6}_decodeLiteralsBlock()` could return a value larger than `srcSize`.
 2016-10-18 16:41:33 -07:00
Yann Collet
06573e17be fixed minor corner case 2016-10-17 17:28:28 -07:00
Nick Terrell
4db751668f Fix buffer overrun in ZSTD_loadEntropy() 
The table log set by `FSE_readNCount()` was not checked in
`ZSTD_loadEntropy()`.  This caused `FSE_buildDTable(dctx->MLTable, ...)`
to overwrite the beginning of `dctx->hufTable`.

The benchmarks look good, there is no obvious performance regression:

  > ./zstds/zstd.opt.0 -i10 -b1 -e5 ~/bench/silesia.tar
   1#silesia.tar       : 211988480 ->  73656930 (2.878), 268.2 MB/s , 701.0 MB/s
   2#silesia.tar       : 211988480 ->  70162842 (3.021), 199.5 MB/s , 666.9 MB/s
   3#silesia.tar       : 211988480 ->  66997986 (3.164), 154.9 MB/s , 655.6 MB/s
   4#silesia.tar       : 211988480 ->  66002591 (3.212), 128.9 MB/s , 648.4 MB/s
   5#silesia.tar       : 211988480 ->  65008480 (3.261),  98.4 MB/s , 633.4 MB/s

  > ./zstds/zstd.opt.2 -i10 -b1 -e5 ~/bench/silesia.tar
   1#silesia.tar       : 211988480 ->  73656930 (2.878), 266.1 MB/s , 703.7 MB/s
   2#silesia.tar       : 211988480 ->  70162842 (3.021), 199.0 MB/s , 666.6 MB/s
   3#silesia.tar       : 211988480 ->  66997986 (3.164), 156.2 MB/s , 656.2 MB/s
   4#silesia.tar       : 211988480 ->  66002591 (3.212), 133.2 MB/s , 647.4 MB/s
   5#silesia.tar       : 211988480 ->  65008480 (3.261),  96.3 MB/s , 633.3 MB/s
 2016-10-17 15:51:15 -07:00
Yann Collet
7933434fdf Merge branch 'dev' of github.com:facebook/zstd into dev 2016-10-14 13:32:35 -07:00
Yann Collet
d4cda27b63 new command -M#, to limit memory usage during decompression (#403) 2016-10-14 13:32:20 -07:00
Nick Terrell
3b9cdf9220 Fix ubsan failures (pass NULL to memcpy) 2016-10-12 20:54:42 -07:00
Yann Collet
5d919e7ac3 added ZSTD_error_frameParameter_windowTooLarge (#403) 2016-10-12 17:29:24 -07:00
Nick Terrell
7158584399 Fix ZSTD_execSequence() edge case 2016-10-12 10:05:26 -07:00
Yann Collet
2f2639438a zstreamtest can fuzztest pledgedSrcSize 2016-09-26 14:06:08 +02:00
Yann Collet
51f4d566c2 small decompression speed boost for very small data 2016-09-22 15:57:28 +02:00
Yann Collet
d7c6589df8 support ZSTD_sizeof_*() on NULL 
added ZSTD_sizeof_CDict()
 2016-09-15 02:57:27 +02:00
Yann Collet
e91c4b4cef introduced ZSTD_resetDStream() . 
added : ZSTD_sizeof_DDict()
 2016-09-14 16:55:44 +02:00
Yann Collet
d092d77cfc minor variable renaming 2016-09-14 16:14:57 +02:00
Yann Collet
26ec254066 new strategy for faster DDict decompression 2016-09-13 16:52:16 +02:00
Yann Collet
b3060f7a9e changed streaming decoder behavior : now, when all compressed frame is consumed, it means decompression is completed, with regenerated data fully flushed. 2016-09-09 16:44:16 +02:00
Yann Collet
95d07d7447 introduced CHECK_E 2016-09-06 16:38:51 +02:00
Yann Collet
3e21ec5b01 introduced CHECK_F 2016-09-06 15:36:19 +02:00
Yann Collet
5c956d593c FORCE_INLINE common definition 2016-09-06 15:05:19 +02:00
Yann Collet
7c83dfd5c2 ZSTD_frameHeaderSize_prefix (#340), as result of ZSTD_initStream 2016-09-05 19:47:43 +02:00
Yann Collet
1563bfeabc fixing FORCE_INLINE for older compilers (#330) 2016-09-02 11:44:21 -07:00
David Lam
e10f7f3dcb merge 2016-08-30 12:03:36 -07:00
Yann Collet
4ded9e591c added boilerplate 2016-08-30 11:06:28 -07:00
David Lam
da9d3b7057 Cleanup some errors in typedef comments and remove duplicated HOWTO from zbuff_decompress.c 2016-08-29 17:31:51 -07:00
Yann Collet
23b6e05d8e ZSTD_malloc() and ZSTD_free(), to simplify customMem 2016-08-28 21:05:43 -07:00
Yann Collet
5f53b0335e fixed continuation context 2016-08-28 10:00:49 -07:00
Yann Collet
767d8f66fa legacy contexts can be re-used 2016-08-28 08:19:47 -07:00
Yann Collet
4bf317dd00 first version supporting legacy streams (transparent decoding) 2016-08-28 07:43:34 -07:00
inikep
a3a47ec4d0 Merge remote-tracking branch 'refs/remotes/Cyan4973/dev' into Other 2016-08-24 21:25:49 +02:00
inikep
e416e30019 remove unnecessary comments 2016-08-24 17:32:09 +02:00
Yann Collet
17e482efdd added ZSTD_setDStreamParameter() 2016-08-23 16:58:10 +02:00
Yann Collet
3071c3e303 STREAM_WINDOW_MAX : protect streaming from unreasonable memory requirements 2016-08-23 01:34:34 +02:00
Yann Collet
70e3b31306 fixed playtests on os-x 2016-08-23 01:18:06 +02:00
Yann Collet
cb3276329a added sizeof CStream and DStream 2016-08-23 00:31:59 +02:00
Yann Collet
8baf78a291 minor coding style 2016-08-20 13:04:20 +02:00
Yann Collet
1bee2d5e08 slight decompression speed improvement 2016-08-20 02:59:04 +02:00
Yann Collet
af1960396b sync huff0 2016-08-19 19:38:19 +02:00
Yann Collet
18442c1482 minor refactoring 2016-08-18 01:40:32 +02:00
Yann Collet
53e17fbd5e updated streaming API 2016-08-17 01:39:22 +02:00
Yann Collet
104e5b072d added : streaming decompression API 2016-08-16 15:11:28 +02:00
inikep
038d1497c9 fixed compilation with Visual Studio 2005 2016-08-10 14:30:10 +02:00
Yann Collet
917fe188f1 Implemented repOffset "minus 1" on ll==0 2016-07-31 04:01:57 +02:00
Yann Collet
66f69e58d2 restore decompression speed on fizzle 2016-07-30 15:32:47 +02:00
Yann Collet
f714f59c16 fixed visual warning 2016-07-30 12:05:28 +02:00
Yann Collet
761f8dbbd2 back to normal table cell copy 2016-07-30 11:43:53 +02:00
Yann Collet
3c6b808870 minor decompression speed gains 2016-07-30 03:20:47 +02:00
Yann Collet
c00d30fbe4 Merge pull request #264 from inikep/dev08 
Dev08
 2016-07-29 17:42:30 +02:00
Yann Collet
4c5bbf64f9 fixed : frame concatenation without checksum 2016-07-28 20:30:25 +02:00
Yann Collet
60ba31c570 zbuff uses ZSTD_compressEnd() 2016-07-28 19:55:09 +02:00
Yann Collet
c991cc1828 new frame end, 32-bits checksums 2016-07-28 00:55:43 +02:00
inikep
003c7a8568 optimal parser: removed ZSTD_REP_INIT 2016-07-27 11:07:13 +02:00
Eric Biggers
0a55e7a0bb ZSTD_decompressFrame(): use remainingSize instead of iend - ip 
Same behavior, but no need to have redundant variables.
 2016-07-26 13:22:27 -07:00
Eric Biggers
aa6c70bf60 ZSTD_decompressFrame(): pass up error code from ZSTD_decodeFrameHeader() 2016-07-26 13:22:27 -07:00
Eric Biggers
e4d0265ea9 Replace remaining references to "direct mode" with "single segment mode" 2016-07-26 13:22:27 -07:00
Yann Collet
cbc5e9dc19 fixes oob read 2016-07-24 18:02:04 +02:00
Yann Collet
7ed5e33b89 minor comment changes 2016-07-24 14:26:11 +02:00
Yann Collet
10b9c13d07 fixed doc on cLevel default, reported by Oliver Lange 2016-07-24 01:21:53 +02:00
Yann Collet
f8e7b5363f unified encoding types 2016-07-23 16:31:49 +02:00
Yann Collet
c2e1a68d81 changed streamNb order to 1-4-4-4 2016-07-22 17:30:52 +02:00
Yann Collet
772d912c2f more complete support for literals repeat mode 2016-07-22 15:04:25 +02:00
Yann Collet
9f2d82d4a4 fixed : big-endian decoding 2016-07-22 14:37:10 +02:00
Yann Collet
32faf6c8e7 fixed conversion warnings 2016-07-22 14:37:09 +02:00
Yann Collet
5e45a5fbb3 force loop-align to 32 for zstd_decompress 2016-07-22 14:37:09 +02:00
Yann Collet
5288ac0cb7 changed filed order 2016-07-22 14:37:09 +02:00
Yann Collet
198e6aac44 Literals header fields use little endian convention 2016-07-22 14:37:09 +02:00