AuroraMiddleware/zstd
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
2,785 Commits 1 Branch 0 Tags 27 MiB
9050e1925e
Commit Graph

1305 Commits

Author SHA1 Message Date
Yann Collet
8ce1cc2bec improved ZSTD_createCCtxPool() cancellation 
use ZSTD_freeCCtxPool() to release the partially created pool.
avoids to duplicate logic.

Also : identified a new difficult corner case :
when freeing the Pool, all CCtx should be previously released back to the pool.
Otherwise, it means some CCtx are still in use.
There is currently no clear policy on what to do in such a case.
Note : it's supposed to never happen.
Since pool creation/usage is static, it has no external user,
which limits risks.
 2017-01-11 15:44:26 +01:00
Yann Collet
47557ba2b2 fixed ZSTDMT_createCCtxPool() when inner CCtx creation fails 2017-01-11 15:35:56 +01:00
Nick Terrell
8d984699db Document memory requirements for COVER algorithm 2017-01-09 18:20:10 -08:00
Nick Terrell
555e281637 Handle large input size in 32-bit mode correctly 2017-01-09 18:20:06 -08:00
Nick Terrell
3a1fefcf00 Simplify COVER parameters 2017-01-02 17:51:38 -08:00
Nick Terrell
96b39f65fa Add COVER dictionary builder 2017-01-02 13:22:51 -08:00
Yann Collet
6334b04d61 compile object files, for faster recompilation 2017-01-02 03:22:18 +01:00
Yann Collet
f1cb55192c fixed linux warnings 2017-01-02 01:11:55 +01:00
Yann Collet
0ec6a95ba1 minor fixes 2017-01-02 00:49:42 +01:00
Yann Collet
2ec635a162 use pthread_cond to send signals between threads 2017-01-01 17:31:33 +01:00
Nick Terrell
bb13387d7d Fix pool for threading.h 2016-12-31 19:10:47 -05:00
Nick Terrell
4204e03e77 Add threading.h condition variables 2016-12-31 19:10:29 -05:00
Yann Collet
3b9d434356 extended ZSTDMT code support for non-MT systems and WIN32 (preliminary) 2016-12-31 16:32:19 +01:00
Yann Collet
c8efc1c874 simplified Buffer Pool 2016-12-31 14:45:33 +01:00
Yann Collet
3b29dbd9e8 new zstdmt version using generic treadpool 2016-12-31 06:04:25 +01:00
Yann Collet
c6a6417458 bench correctly measures time for multi-threaded compression (posix only) 2016-12-31 03:31:26 +01:00
Yann Collet
f765a375a5 Merge pull request #504 from terrelln/thread-pool 
[zstdmt] Add thread pool
 2016-12-30 15:31:49 +01:00
Nick Terrell
e777a5be6b Add a thread pool for ZSTDMT and COVER 2016-12-29 23:39:44 -08:00
Yann Collet
e70912c72b Changed : input divided into roughly equal parts. 
Debug : can measure time waiting for mutexes to unlock.
 2016-12-29 01:24:01 +01:00
Yann Collet
6c0ed9483a compression threads use ZSTD_compressCCtx() 2016-12-28 17:08:28 +01:00
Yann Collet
8d7432914f Merge pull request #503 from inikep/dev11 
Dev11
 2016-12-28 16:50:39 +01:00
Yann Collet
ce9e1452fd protect buffer pool with a mutex 2016-12-28 15:31:19 +01:00
Przemyslaw Skibinski
75f3a3a335 changed default PREFIX and MANDIR 2016-12-28 12:32:41 +01:00
Yann Collet
3d93f2fce7 first zstdmt sketch 2016-12-27 07:19:36 +01:00
Yann Collet
39c105c605 Merge branch 'dev' of github.com:facebook/zstd into dev 2016-12-23 22:25:31 +01:00
Yann Collet
aca113f4f5 fixed ZSTD_sizeof_?Dict() 2016-12-23 22:25:03 +01:00
Yann Collet
c07d2e3a31 Merge pull request #499 from inikep/dev11 
improved *BSD and Solaris compatibility
 2016-12-23 21:32:03 +01:00
Przemyslaw Skibinski
63b0014b96 BSD: improved "make install" 2016-12-23 10:05:49 +01:00
Nick Terrell
1b5d4a7d53 ZDICT_finalizeDictionary() flipped comparison 2016-12-22 18:14:57 -08:00
Nick Terrell
bcbe77e994 ZDICT_finalizeDictionary() flipped comparison 
`ZDICT_finalizeDictionary()` had a flipped comparison.
I also allowed `dictBufferCapacity == dictContentSize`.
It might be the case that the user wants to fill the dictionary
completely up, and then let zstd take exactly the space it needs
for the entropy tables.
 2016-12-22 18:01:14 -08:00
Nick Terrell
78a0072d5a Fix failing test due to deprecation warning 2016-12-22 17:36:16 -08:00
Yann Collet
d76d1a9ef0 added ZDICT_finalizeDictionary() 2016-12-22 20:18:43 +01:00
Przemyslaw Skibinski
b999170311 Solaris: working "make -C lib install" 2016-12-22 20:14:37 +01:00
Yann Collet
ba75e9d8c3 fix : zlib wrapper compile in gnu90 mode 2016-12-21 19:57:18 +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
Yann Collet
8333106b8a Merge branch 'dev' of github.com:facebook/zstd into dev 2016-12-21 16:44:24 +01:00
Yann Collet
0d7e84899f Merge pull request #489 from inikep/v112 
improved detection of POSIX
 2016-12-21 16:42:46 +01:00
Yann Collet
1f57c2ed32 added : ZSTD_createCDict_byReference() 2016-12-21 16:20:11 +01:00
Przemyslaw Skibinski
2f6ccee6af platform.h: removed Compiler Options 2016-12-21 13:23:34 +01:00
Przemyslaw Skibinski
5736db219e fix basic types redefinition 2016-12-21 09:26:00 +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
Przemyslaw Skibinski
f8046b8e72 Merge remote-tracking branch 'refs/remotes/facebook/dev' into v112 
# Conflicts:
#	appveyor.yml
 2016-12-19 08:20:26 +01:00
Yann Collet
d564faa3c6 fix : ZSTD_initCStream_srcSize() correctly set srcSize in frame header 2016-12-18 21:39:15 +01:00
Yann Collet
1496c3dc47 Fix : size estimation when some samples are very large 2016-12-18 11:58:23 +01:00
Yann Collet
d46ecb58a5 added dll compilation tests 2016-12-17 16:28:12 +01:00
Nick Terrell
8de46ab51a Export all API functions 2016-12-16 13:27:30 -08:00
Przemyslaw Skibinski
0a1caeef6d VS: fixed 32-bit DLL compilation 2016-12-15 12:12:46 +01:00
Przemyslaw Skibinski
4e10bd339d appveyor.yml: added tests of fullbench-dll fullbench-lib 2016-12-15 12:09:23 +01:00
Przemyslaw Skibinski
60f10aab6c introduced ZSTDLIB_VISIBILITY 2016-12-15 11:32:31 +01:00
Yann Collet
2b36b238d3 changed variable name to estimatedSrcSize, to emphasize it does not need to be exact 2016-12-13 17:59:55 +01:00
Yann Collet
e795c8a5f6 Added ZSTD_initCStream_srcSize(). 
Added relevant test cases in zstreamtest
 2016-12-13 17:00:14 +01:00
Yann Collet
5397a66b19 minor BMI version check 2016-12-13 15:21:06 +01:00
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
c3a5c4bef8 introduced cycleLog 2016-12-12 00:47:30 +01:00
Yann Collet
c261f71f6a minor variation of rescale fix 2016-12-12 00:25:07 +01:00
Nick Terrell
3826207a70 Simplify segfault fix 
Take advantage of the fact that `chainLog <= windowLog`.
 2016-12-10 18:46:55 -08:00
Nick Terrell
0012332ce0 Fix compression segfault 
When the overflow protection kicks in, it makes sure that ip - ctx->base
isn't too large.  However, it didn't ensure that saved offsets are
still valid.  This change ensures that any valid offsets (<= windowLog)
are still representable after the update.

The bug would shop up on line 1056, when `offset_1 > current + 1`, which
causes an underflow.  This in turn, would cause a segfault on line 1063.

The input must necessarily be longer than 1 GB for this issue to occur.
Even then, it only occurs if one of the last 3 matches is larger than
the chain size and block size.
 2016-12-09 17:15:33 -08:00
Yann Collet
383b8088a3 minor lib build refactoring 2016-12-08 18:42:27 -08:00
Yann Collet
6e754fe76a fixed lib soname. 
example : simple_compression : size overflow check
 2016-12-08 18:26:56 -08:00
Przemyslaw Skibinski
7687913178 Merge remote-tracking branch 'refs/remotes/facebook/dev' into dev11 2016-12-08 10:42:42 +01:00
Yann Collet
426a9d4b71 changed : dll : only approved ZSTD symbols are now exposed. All other symbols remain internal. 2016-12-07 16:39:34 -08:00
Przemyslaw Skibinski
4da53219a0 zstd Manual updated to 1.1.2 2016-12-07 11:18:40 +01:00
Yann Collet
379908be3d fixed zstd.h for manual 2016-12-06 10:36:15 -08:00
Yann Collet
9dfd0af164 ZBUFF_ as a wrapper to ZSTD streaming API. 2016-12-06 17:16:41 +01:00
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
Przemyslaw Skibinski
821bf1febc fixed Doxygen trailing comment 2016-12-02 16:13:41 +01:00
Yann Collet
b89af20353 reduced table sizes for HUF_readDTableX4 2016-12-01 18:24:59 -08:00
Yann Collet
a0d742b1e4 introduced HUF_buildCTable_wksp(), to reduce stack memory usage 2016-12-01 17:47:30 -08:00
Yann Collet
643d9a234b replaced usage of FSE_buildCTable by FSE_buildCTable_wksp, using less stack space in the process 2016-12-01 16:24:04 -08:00
Yann Collet
e928f7e16d introduced ext_wksp variants of count to reduce stack memory usage 2016-12-01 16:13:35 -08:00
Yann Collet
979cab412b fixed some minor visual silent cast warnings. 
introduced FSE_count_parallel_wksp().
 2016-11-30 18:10:38 -08:00
Yann Collet
5e00b848a8 FSE_compress_wksp() uses less stack space 2016-11-30 16:46:13 -08:00
Yann Collet
d79a9a00d9 Introduced FSE_compress_wksp() and FSE_buildCTable_wksp() to reduce stack memory usage 2016-11-30 15:52:20 -08:00
Yann Collet
766431909f introduced FSE_decompress_wksp(), to use less stack space 2016-11-30 12:36:45 -08:00
Yann Collet
95eb43be09 updated pkg config file 2016-11-30 11:06:58 -08:00
Yann Collet
42247705a3 Merge pull request #461 from obache/neatsrc/pkgconfig 
libzstd.pc.in: Change to use variables for libdir and includedir
 2016-11-30 20:03:42 +01:00
Yann Collet
ff504de391 minor decompression speed improvement 2016-11-29 17:42:46 -08:00
Yann Collet
25f46dcc0f minor const 2016-11-29 16:59:27 -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
013a2b58ae Merge pull request #464 from terrelln/guards 
Fix ZSTD_STATIC_LINKING_ONLY with double include
 2016-11-29 23:06:10 +01:00
Yann Collet
167c494748 Merge branch 'dev' of github.com:facebook/zstd into dev 2016-11-29 14:05:15 -08:00
Yann Collet
4f5350f610 long matches support overflow 2016-11-29 13:12:24 -08:00
Nick Terrell
05c00f2ff7 Fix ZSTD_STATIC_LINKING_ONLY with double include 2016-11-29 11:54:39 -08:00
OBATA Akio
c53eea7c1a libzstd.pc.in: Change to use variables for libdir and includedir 2016-11-29 16:47:53 +09:00
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
Przemyslaw Skibinski
fc4193bda5 fixed g++ warnings 2016-11-23 18:17:18 +01:00
Przemyslaw Skibinski
9ca65af810 zstd_opt.h: improved price function 2016-11-23 17:22:54 +01:00
Przemyslaw Skibinski
ad3e94512c fixed warnings from static analyzer in zstd_opt.h 2016-11-21 20:22:12 +01:00
Przemyslaw Skibinski
eec700a3b7 exclude zbuff_compress.c and zbuff_decompress.c 2016-11-21 14:34:03 +01:00
Przemyslaw Skibinski
62d19a6f39 lib\README.md: added Using MinGW+MSYS to create DLL 2016-11-21 14:22:08 +01:00
Przemyslaw Skibinski
b85f767743 files to generate ZSTD Windows binary package 2016-11-21 14:10:55 +01:00
Przemyslaw Skibinski
8bb86e330b create DLL with Windows 2016-11-21 12:51:01 +01:00
Przemyslaw Skibinski
93a09eedf1 added libzstd.def 2016-11-21 12:33:27 +01:00
Przemyslaw Skibinski
5a17223691 Merge remote-tracking branch 'refs/remotes/facebook/dev' into dev11 2016-11-18 11:47:01 +01:00
Przemyslaw Skibinski
3d18088b38 updated windres 2016-11-17 18:04:41 +01:00
Yann Collet
0d761dbe95 Merge pull request #453 from inikep/dev11 
fullbench-dll
 2016-11-16 15:45:30 -08:00
Yann Collet
52afb3993e zbuff API now generates deprecation warnings 2016-11-16 08:50:54 -08:00
Przemyslaw Skibinski
179555c1d1 working fullbench-dll 2016-11-15 18:05:46 +01:00
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
8e4901eccd removed zbuff.h from include installation 2016-11-08 15:45:39 -08:00
Yann Collet
fd3be6bc97 bump version number to 1.1.2 2016-11-07 14:35:41 -08:00
Nick Terrell
dc904ad17b Fix bug in zstd v0.{5, 6} dictionary decompression 
Introduced by bb68062c59.
 2016-11-04 16:18:59 -07:00
Przemyslaw Skibinski
38b590ad69 Merge remote-tracking branch 'refs/remotes/facebook/dev' into dev11 
# Conflicts:
#	lib/Makefile
 2016-11-04 10:10:54 +01:00
Yann Collet
407a11f63e fixed Visual compatibility 2016-11-03 15:52:01 -07:00
Yann Collet
11812260d1 Merge pull request #439 from terrelln/dev 
ZSTD_compress_usingDict() specify dict == NULL
 2016-11-03 14:15:36 -07:00
Nick Terrell
c8a9ac312b Fix dynamic libzstd symlinks 2016-11-03 12:32:48 -07:00
Przemyslaw Skibinski
3a415594b1 fixed MinGW compilation 2016-11-03 12:59:20 +01:00
Yann Collet
7347869fb6 fixed make install 2016-11-02 22:28:37 -07:00
Nick Terrell
d82efd8a70 ZSTD_compress_usingDict() when dict gets loaded 
Specify that when `dict == NULL || dictSize < 8` no dictionary
gets loaded.
Also add some periods.
 2016-11-02 18:07:16 -07:00
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
f3f13211ae Fix #419 : no warning when setting custom LDFLAGS 2016-11-02 17:02:45 -07:00
Yann Collet
0a5a5fb7fd Fix #418 : printing selected segments in zdict debug mode can segfault with certain pathological patterns 2016-11-02 13:57:55 -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
Yann Collet
ee5b725823 ZSTD_initCStream() optimization : do not allocate a CDict when no dictionary used 2016-10-27 14:20:55 -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
Yann Collet
9516234e67 first sketch for ZSTD_initCStream_usingCDict() 2016-10-25 16:19:52 -07:00
Yann Collet
62d9a7ddfd Merge pull request #429 from inikep/btopt2 
Btopt2
 2016-10-25 14:48:43 -07:00
Przemyslaw Skibinski
5c5f01f3da added ZSTD_btopt2 strategy 2016-10-25 12:25:07 +02:00
Yann Collet
7b5948cca7 Merge pull request #426 from terrelln/fixes 
Fix various {A, M}SAN bugs
 2016-10-24 23:42:26 -07:00
Yann Collet
37d130031d updated comments on context re-use 2016-10-24 17:22:12 -07:00
Nick Terrell
b2c39a22b0 Fix compiler narrowing warning 2016-10-24 14:50:13 -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
Nick Terrell
f9c9af3c2e Reject dictionaries with incomplete entropy tables 
If a dictionary specifies that a symbol has probability zero in its
`matchLength`, `literalLength`, or `offset` FSE table, but the symbol
appears when compressing input, the compressor fails.

Ensure that dictionaries support all `matchLength`, and `literalLength`
codes.  They must also support all of the `offset` codes required to
represent every possible offset that can appear in the first block.
 2016-10-24 10:42:44 -07:00
Przemyslaw Skibinski
984b66cd72 added contrib\gen_html 2016-10-24 15:59:51 +02:00
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
Przemyslaw Skibinski
4732074a71 improved ZSTD_compressBlock_opt_extDict_generic 2016-10-21 11:19:00 +02:00
Yann Collet
da3bd8b6de protect ZSTD_decodeFrameHeader() from invalid usage, as suggested by @spaskob 2016-10-20 20:11:00 -07:00
Przemyslaw Skibinski
d365ae3497 zstd_opt.h: small improvement in compression ratio 2016-10-20 11:49:02 +02:00
Przemyslaw Skibinski
575ab00db7 Merge remote-tracking branch 'refs/remotes/facebook/dev' into dev11 2016-10-20 11:01:52 +02:00
Nick Terrell
d760529a05 Fix stack buffer overrun when weightTotal == 0 
If `weightTotal == 0`, then `BIT_highbit32(weightTotal)` is
undefined behavior in the case that it calls `__builtin_clz()`.
If `tableLog == HUF_TABLELOG_ABSOLUTEMAX` then we will access one
byte beyond the end of the buffer.
 2016-10-19 11:39:11 -07:00