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5043 Commits
Author SHA1 Message Date
W. Felix Handte 64553a0e35 Rename ZSTD_DECOMPRESS_MINIMAL -> ZSTD_FORCE_DECOMPRESS_SEQUENCES_SHORT 2018-12-18 13:36:39 -08:00
W. Felix Handte 605dd576ee Remove Error Strings with ZSTD_STRIP_ERROR_STRINGS 2018-12-18 13:36:39 -08:00
W. Felix Handte 9d5f3963ff Add Option to Not Request Inlining with ZSTD_NO_INLINE 2018-12-18 13:36:39 -08:00
W. Felix Handte df28e5babd Add ZSTD_DECOMPRESS_MINIMAL Macro, Which Reduces Branching of Decompress Variants 2018-12-18 13:36:39 -08:00
W. Felix Handte f45c9df42e Totally Hide/Disable X2 Variants when HUF_DECOMPRESS_MINIMAL is Defined 2018-12-18 13:36:39 -08:00
W. Felix Handte 36a84b07a8 Load Dictionaries as X1 Tables 2018-12-18 13:36:39 -08:00
W. Felix Handte f9cb348776 Add HUF_DECOMPRESS_MINIMAL Macro, Which Avoids Using X2 Variants 2018-12-18 13:36:39 -08:00
Yann Collet 635783da12 btultra2 and very small srcSize 
When srcSize is small,
the nb of symbols produced is likely too small to warrant dedicated probability tables.
In which case, predefined distribution tables will be used instead.

There is a cheap algorithm in btultra initialization :
it presumes default distribution will be used if srcSize <= 1024.

btultra2 now uses the same threshold to shut down probability estimation,
since measured frequencies won't be used at entropy stage,
and therefore relying on them to determine sequence cost is misleading,
resulting in worse compression ratios.

This fixes btultra2 performance issue on very small input.

Note that, a proper way should be
to determine which symbol is going to use predefined probaility
and which symbol is going to use dynamic ones.
But the current algorithm is unable to make a "per-symbol" decision.
So this will require significant modifications.
 2018-12-18 12:32:58 -08:00
Yann ColletandGitHub 517d8c984c Merge pull request #1449 from facebook/ovlog_def 
overlapLog default values
 2018-12-18 09:45:53 -08:00
Yann Collet 373ff8b983 play around with rescale weights 2018-12-17 15:48:34 -08:00
Yann Collet 8be145a8c1 fixed default job size 2018-12-13 16:38:08 -08:00
Nick TerrellandGitHub 75fa3f2eb7 Merge pull request #1446 from terrelln/overflow 
[libzstd] Fix infinite loop in decompression
 2018-12-13 16:21:15 -08:00
Yann Collet 62180b27d5 zstdmt parameter getter/setter use int 2018-12-13 15:47:34 -08:00
Nick Terrell aaea4ef924 [libzstd] Fix infinite loop in decompression 
When we switched `ZSTD_SKIPPABLEHEADERSIZE` to a macro, the places where we do:

    MEM_readLE32(ptr) + ZSTD_SKIPPABLEHEADERSIZE

can now overflow `(unsigned)-8` to `0` and we infinite loop. We now check
the frame size and reject sizes that overflow a U32.

Note that this bug never made it into a release, and was only in the dev branch
for a few days.

Credit to OSS-Fuzz
 2018-12-13 15:13:19 -08:00
Yann Collet 34f01e600f fixed multiple conversions 
from 64-bit to 32-bit
 2018-12-13 14:02:22 -08:00
Yann Collet 1993f5d412 fixed ovlog tests 
and updated man page
 2018-12-12 21:09:14 -08:00
Yann Collet f2f86d369b Merge branch 'btultra2' into ovlog_def 2018-12-12 20:58:14 -08:00
Yann Collet 9a92ed401d updated compression results.csv 
and fixed nit
 2018-12-12 20:30:09 -08:00
Yann Collet 9792acda3b Merge branch 'dev' into btultra2 2018-12-12 20:18:27 -08:00
Yann Collet 7bb8dfc62f new overlapLog default values 
varies between 6 and 9, depending on strategy
 2018-12-11 18:10:29 -08:00
Yann Collet eee789b7ea continued: changed to overlapLog 
in deeper code layer.
for consistency.
 2018-12-11 17:41:42 -08:00
Yann Collet 9b784dec7f changed parameter name to ZSTD_c_overlapLog 
from overlapSizeLog.

Reasoning :
`overlapLog` is already used everwhere, in the code, command line and documentation.
`ZSTD_c_overlapSizeLog` feels unnecessarily different.
 2018-12-11 16:55:33 -08:00
Yann Collet 52b94f902c add clarification for ZSTD_CCtx_setPledgedSrcSize() 
as requested in #1391
 2018-12-11 12:08:21 -08:00
Yann ColletandGitHub 9c3265a53f Merge pull request #1417 from facebook/advancedAPI 
Advanced API
 2018-12-10 18:48:15 -08:00
Yann Collet 5e6aaa3abb fixed btultra2 usage with prefix 
notably while using multi-threading
 2018-12-10 18:45:03 -08:00
Yann Collet 3619c34399 fix assert position within ZSTD_compress2() 2018-12-10 17:42:35 -08:00
Yann Collet 5a1e01e5f1 clarified experimentalParam 2018-12-10 17:36:20 -08:00
Yann Collet c226a7b9f3 fixed ZSTD_compress2() 
as suggested by @terrelln
 2018-12-10 17:33:49 -08:00
Yann Collet 37e314a68d updated clevel table for large inputs 2018-12-09 22:38:05 -08:00
Yann Collet c9c4c7ec8c update clevel table for 256K 2018-12-08 21:40:08 -08:00
Yann Collet 8075d75f9c update clevel table for 128K 2018-12-08 10:42:55 -08:00
Yann Collet 95b152ab33 updated clevel table for 16K 
to introduce btultra2
 2018-12-07 20:12:43 -08:00
Yann Collet d613fd9afe linked btultra2 as strategy9 
and ensure zstdbench detects out-of-bound parameters
 2018-12-06 19:27:37 -08:00
Yann Collet 34aa401afd updated documentation 
introducing ZSTD_btultra2
 2018-12-06 17:22:19 -08:00
Yann Collet ae370b0e12 minor bound refinements 2018-12-06 16:51:17 -08:00
Yann Collet 39e28982cf introduced constants ZSTD_STRATEGY_MIN and ZSTD_STRATEGY_MAX 2018-12-06 16:16:16 -08:00
Yann Collet c3c3488981 fixed c++ assignment to enum 2018-12-06 15:57:55 -08:00
Yann Collet be9e561da4 changed ZSTD_c_compressionStrategy into ZSTD_c_strategy 
also : fixed paramgrill, and limit conditions
 2018-12-06 15:00:52 -08:00
Yann Collet e9448cdf4c introduced strategy btultra2 
note : not yet applied on any compression level
 2018-12-06 13:38:09 -08:00
Yann Collet 0c404a48f0 moved ZSTD_WINDOWLOG_LIMIT_DEFAULT into static-linking-only area 2018-12-06 10:57:19 -08:00
Yann Collet 96d887429b clarified usage of word "job" 
only applies in MT / async context now.
 2018-12-06 10:14:34 -08:00
Yann Collet 3583d19c4e changed parameter names from ZSTD_p_* to ZSTD_c_* 
for naming consistency
 2018-12-05 17:26:02 -08:00
Yann Collet c2053310e5 updated API documentation 2018-12-05 16:23:00 -08:00
Yann Collet 3e042d5cc0 ZSTD_decompressDCtx() is compatible with sticky parameters 2018-12-04 17:30:58 -08:00
Yann Collet d7da3fc90a merge dedicated dParam setters 2018-12-04 17:06:48 -08:00
Yann Collet 4b5a4f02d7 write the switch()case: differently 
so that it please both
compilers which warn for dead code after the switch
and
compilers which do not detect that all branches terminate.
 2018-12-04 16:59:26 -08:00
Yann Collet 85b02bf142 fixed silent conversion warning 2018-12-04 15:57:16 -08:00
Yann Collet aec945f0dc implemented ZSTD_dParam_getBounds() 
and ZSTD_DCtx_setParameter()
 2018-12-04 15:35:37 -08:00
Yann Collet 34e146f548 advanced decompression function replaces by normal streaming one 
advanced parameters compatible with ZSTD_decompressStream().
 2018-12-04 10:28:36 -08:00
Yann Collet 7ef7dc561a check availability of --color=never command on grep and egrep 
before applying them.
Fixes #1436
 2018-12-03 15:46:55 -08:00