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4731 Commits
Author SHA1 Message Date
Victor ZhangandGitHub a610550e2c Merge pull request #4218 from facebook/externC 
Move #includes out of `extern "C"` blocks
 2025-01-07 10:06:08 -08:00
Victor Zhang d88651e604 Do not vary row matchfinder selection based on availability of SSE2/Neon 
Move towards a stronger guarantee of reproducibility by removing this small difference for machines without SSE2/Neon.
The SIMD behavior is now the default for all platforms.
 2025-01-03 09:35:18 -08:00
Nick TerrellandNick Terrell 1548bfc349 [opt] Fix too short of match getting generated 
The optimal parser with LDM enabled using minMatch > 3 could generate a match
length of 3 when minMatch >= 4. This is not allowed.

1. Fix the bug
2. Add validation logic to `ZSTD_buildSeqStore()` in debug mode for all block
   compressors that checks we never generate too short a match. This way we don't
   rely on the `generate_sequences` fuzzer to find this issue.

Credit to OSS-Fuzz
 2025-01-03 11:38:41 -05:00
Yann Collet 04a2a0219c update type names 
naming convention: Type names should start with a Capital letter (after the prefix)
 2024-12-29 14:25:33 -08:00
Yann Collet a2ff6ea784 improve ZSTD_getFrameHeader on skippable frames 
now reports:
- the header size
- the magic variant (within @dictID field)
 2024-12-29 12:26:04 -08:00
Yann Collet f8a2b352d6 clarify doc on Frame-level methods when invoked on a skippable frame 
following discussion at #4226
 2024-12-29 02:41:09 -08:00
Yann Collet 47cbfc87a9 restore invocation of ZSTD_entropyCompressSeqStore() 
in the ZSTD_compressSequences() pipeline
 2024-12-20 10:37:01 -08:00
Yann Collet 522adc34eb minor: use MEM_writeLE24() 
so that an empty frame needs only 3 bytes of dstCapacity.
 2024-12-20 10:37:01 -08:00
Yann Collet b7a9e69d8d added parameter litCapacity 
to ZSTD_compressSequencesAndLiterals()
to enforce the litCapacity >= litSize+8 condition.
 2024-12-20 10:37:01 -08:00
Yann Collet 76445bb379 add a check, to return an error if Sequence validation is enabled 
since ZSTD_compressSequencesAndLiterals() doesn't support it.
 2024-12-20 10:37:01 -08:00
Yann Collet ab0f1798e8 ensure that srcSize is controlled 2024-12-20 10:37:00 -08:00
Yann Collet b339efff2b add dedicated error code for special case 
ZSTD_compressSequencesAndLiterals() cannot produce an uncompressed block
 2024-12-20 10:37:00 -08:00
Yann Collet 0a54f6f288 ZSTD_compressSequencesAndLiterals requires srcSize as parameter 
this makes it possible to adjust windowSize to its tightest.
 2024-12-20 10:37:00 -08:00
Yann Collet b7b4e86347 fixed minor conversion warning 2024-12-20 10:37:00 -08:00
Yann Collet 12c47d3262 improved speed of the Sequences converter 2024-12-20 10:37:00 -08:00
Yann Collet 95ad9e47ff added benchmark for ZSTD_convertBlockSequences_wBlockDelim() 2024-12-20 10:37:00 -08:00
Yann Collet d48e330ae1 change name to ZSTD_convertSequences*() 2024-12-20 10:37:00 -08:00
Yann Collet 31b5ef2539 ZSTD_compressSequencesAndLiterals() now supports multi-blocks frames. 2024-12-20 10:36:59 -08:00
Yann Collet 5164d44dab change advanced parameter name: ZSTD_c_repcodeResolution 
and updated its documentation.
Note: older name ZSTD_c_searchForExternalRepcodes remains supported via #define
 2024-12-20 10:36:59 -08:00
Yann Collet ca8bd83373 minor: cleaner function parameter repcodeResolution 2024-12-20 10:36:59 -08:00
Yann Collet d2d0fdac42 updated documentation on validateSequence 2024-12-20 10:36:59 -08:00
Yann Collet 1f6d6815c3 optimization: instantiate specialized version without Sequence checking code 
results in +4% compression speed,
thanks to removal of branches in the hot loop.
 2024-12-20 10:36:59 -08:00
Yann Collet a288751de7 minor optimization: only track seqPos->posInSrc when validateSequences is enabled 
note: very minor saving, no performance impact
 2024-12-20 10:36:59 -08:00
Yann ColletandYann Collet f176514467 minor doc update 2024-12-20 10:36:59 -08:00
Yann ColletandYann Collet 1c8f5b0f11 minor optimization for ZSTD_compressSequencesAndLiterals() 
does not need to track and update internal `litPtr`.
note: does not measurably impact performance.
 2024-12-20 10:36:59 -08:00
Yann ColletandYann Collet 0a5c0807af minor conversion warning fix 2024-12-20 10:36:59 -08:00
Yann ColletandYann Collet f281497aef fullbench: new scenario: compressSequencesAndLiterals() 2024-12-20 10:36:59 -08:00
Yann Collet 8ab04097ed add the compressSequences() benchmark scenario 2024-12-20 10:36:59 -08:00
Yann Collet 0b013b2688 added unit tests to ZSTD_compressSequencesAndLiterals() 
seems to work as expected,
correctly control that `litSize` and `srcSize` are exactly correct.
 2024-12-20 10:36:58 -08:00
Yann Collet 14a21e43b3 produced ZSTD_compressSequencesAndLiterals() as a separate pipeline 
only supports explicit delimiter mode, at least for the time being
 2024-12-20 10:36:58 -08:00
Yann Collet bcb15091aa minor: more accurate variable scope 2024-12-20 10:36:58 -08:00
Yann Collet 047db4f1f8 ZSTD_SequenceCopier_f no returns the nb of bytes consumed from input 
which feels much more natural
 2024-12-20 10:36:58 -08:00
Yann Collet 4ef9d7d585 codemod: ZSTD_cParamMode_e -> ZSTD_CParamMode_e 2024-12-20 10:36:58 -08:00
Yann Collet 56cfb7816a codemod: ZSTD_paramSwitch_e -> ZSTD_ParamSwitch_e 2024-12-20 10:36:58 -08:00
Yann Collet 13b9296d79 minor simplification 2024-12-20 10:36:58 -08:00
Yann Collet e0f3aaee46 doc: add mention of frame checksum incompatibility 
for new prototype ZSTD_compressSequencesAndLiterals()
 2024-12-20 10:36:57 -08:00
Yann Collet 08edecb78c codemod: ZSTD_blockCompressor -> ZSTD_BlockCompressor_f 2024-12-20 10:36:57 -08:00
Yann Collet 25bef24c5c codemod: rawSeqStore_t -> RawSeqStore_t 2024-12-20 10:36:57 -08:00
Yann Collet 41c667c0fd codemod: repcodes_t -> Repcodes_t 2024-12-20 10:36:57 -08:00
Yann Collet 5df80acedb codemod: ZSTD_matchState_t -> ZSTD_MatchState_t 2024-12-20 10:36:57 -08:00
Yann Collet fa468944f2 codemod: ZSTD_buildSeqStore_e -> ZSTD_BuildSeqStore_e 2024-12-20 10:36:57 -08:00
Yann Collet 30671d77af codemod: ZSTD_sequencePosition -> ZSTD_SequencePosition 2024-12-20 10:36:57 -08:00
Yann Collet 5359d16d8d enable proper type 2024-12-20 10:36:57 -08:00
Yann Collet 03d95f9d13 fix proper type for .forceNonContiguous 2024-12-20 10:36:57 -08:00
Yann Collet 76dd3a98c4 scope: ZSTD_copySequencesToSeqStore*() are private to ZSTD_compress.c 
no need to publish them outside of this unit.
 2024-12-20 10:36:57 -08:00
Yann Collet 1ac79ba1b6 minor: simplify ZSTD_selectSequenceCopier 2024-12-20 10:36:56 -08:00
Yann Collet 894ea31281 codemod: ZSTD_sequenceCopier -> ZSTD_SequenceCopier_f 2024-12-20 10:36:56 -08:00
Yann Collet c97522f7fb codemod: ZSTD_sequenceFormat_e -> ZSTD_SequenceFormat_e 
since it's a type name.

Note: in contrast with previous names, this one is on the Public API side.
So there is a #define, so that existing programs using ZSTD_sequenceFormat_e still work.
 2024-12-20 10:36:56 -08:00
Yann Collet 0165eeb441 created ZSTD_entropyCompressSeqStore_wExtLitBuffer() 
can receive externally defined buffer of literals
 2024-12-20 10:36:56 -08:00
Yann Collet e9f8a119b4 ZSTD_entropyCompressSeqStore_internal() can accept an externally defined literals buffer 2024-12-20 10:36:56 -08:00