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255 Commits (fecc721fd9b88bdfbc0619f81a092d8f0ec6a4c0)

Author SHA1 Message Date
Yann Collet 22d79762ef fixed multi frames 2017-02-28 02:12:42 -08:00
Yann Collet a33ae64204 fixed decoding skippable frames 2017-02-28 01:15:28 -08:00
Yann Collet d1760113ec Improved speed of ZSTD_decompressStream() 
When ZSTD_decompressStream() detects
that there is enough space in dst
to complete decompression in a single pass,
delegates to ZSTD_decompress(),
for an extra ~5% speed boost
 2017-02-28 00:14:28 -08:00
Yann Collet 0b9b894b2d reduced ZSTD_DDict memory usage 
saved 128 KB
 2017-02-27 00:27:30 -08:00
Yann Collet bd7fa21deb added ZSTD_refDDict() 
Now DDict does no longer depends on DCtx duplication
 2017-02-26 14:43:07 -08:00
Yann Collet d73eebc00f loadEntropy works on new ZSTD_entropy_t type 2017-02-26 10:16:42 -08:00
Yann Collet 8629f0e41f created entropy structure type 2017-02-25 18:33:31 -08:00
Yann Collet 8dff956dbf Added DDict unit test in fuzzer 
also : slightly modified loadEntropy :
know src must points at start of dictionary
 2017-02-25 10:11:15 -08:00
Sean Purcell 9757cc811b Update comment 2017-02-22 12:28:21 -08:00
Sean Purcell 9050e1925e Change name to to findFrameCompressedSize and add skippable support 2017-02-22 12:12:34 -08:00
Anders Oleson 517577bf53 spelling fixes in comments 
i.e. occurred labeled Huffman
 2017-02-20 12:08:59 -08:00
Sean Purcell 6b010dec80 execSequence copies up to 2*WILDCOPY_OVERLENGTH extra 2017-02-16 12:05:40 -08:00
Sean Purcell 887eaa9e21 Fix wildcopy overwriting data still in window 2017-02-15 16:43:45 -08:00
Sean Purcell d7bfcac18a Expose frameSrcSize to experimental API 2017-02-10 11:55:44 -08:00
Sean Purcell ba2ad9f25c ZSTD_decompress now handles multiple frames 2017-02-08 14:50:10 -08:00
Sean Purcell 4e709712e1 Decompressed size functions now handle multiframes and distinguish cases 
- Add ZSTD_findDecompressedSize
    - Traverses multiple frames to find total output size
- Add ZSTD_getFrameContentSize
    - Gets the decompressed size of a single frame by reading header
- Deprecate ZSTD_getDecompressedSize
 2017-02-08 14:50:10 -08:00
Yann Collet bb0027405a fixed zstdmt corruption issue when enabling overlapped sections 
see Asana board for detailed explanation on why and how to fix it
 2017-01-25 16:25:38 -08:00
Sean Purcell 57d423c5df Don't create dict in streaming apis if dictSize == 0 2017-01-17 14:31:35 -08:00
Sean Purcell 834ab50fa3 Fixed decompress_usingDict not propagating corrupted dictionary error 2017-01-11 17:31:34 -08:00
Yann Collet aca113f4f5 fixed ZSTD_sizeof_?Dict() 2016-12-23 22:25:03 +01:00
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