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Yann Collet 9671813375 codemod: seqDef -> SeqDef 
SeqDef is a type name, so it should start with a Capital letter.
It's an internal symbol, no impact on public API.
 2024-12-20 10:36:55 -08:00
Yann Collet b4a40a845f move Sequences definition to zstd_compress_internal.h 
they should not be in common/zstd_internal.h,
since these definitions are not shared beyond lib/compress/.
 2024-12-20 10:36:55 -08:00
Yann Collet a00f45a037 created ZSTD_storeSeqOnly() 
makes it possible to register a sequence without copying its literals.
 2024-12-20 10:36:04 -08:00
Yann Collet 125f05282b publish new symbol ZSTD_compressSequencesAndLiterals() 2024-12-20 10:36:04 -08:00
Yann Collet 2e02cd330d inform manual users that it's automatically generated 
suggested by @Eugeny1
 2024-10-31 15:06:48 -07:00
Yann Collet adbb536d00 fixed single file library test 
copy "zstd_errors.h" alongside "zstd.h" to pass compilation test.
 2024-10-31 14:38:36 -07:00
Yann Collet d9553fd218 elevated ZSTD_getErrorCode() to stable status 
answering #4183
 2024-10-31 14:15:50 -07:00
Yann Collet bbaba45589 change experimental parameter name 
from ZSTD_c_useBlockSplitter to ZSTD_c_splitAfterSequences.
 2024-10-31 13:43:40 -07:00
Yann Collet 4f93206d62 changed variable name to ZSTD_c_blockSplitterLevel 
suggested by @terrelln
 2024-10-29 11:12:09 -07:00
Yann Collet f593ccda04 removed trace left over 2024-10-28 16:57:01 -07:00
Yann Collet fcbf6b014a fixed minor conversion warning 2024-10-28 16:47:38 -07:00
Yann Collet 37706a677c added a test 
test both that the new parameter works as intended,
and that the over-split protection works as intended
 2024-10-28 16:31:15 -07:00
Yann Collet 226ae73311 expose new parameter ZSTD_c_blockSplitter_level 2024-10-28 16:31:15 -07:00
Yann Collet 01474bf73b add internal compression parameter preBlockSplitter_level 
not yet exposed to the interface.

Also: renames `useBlockSplitter` to `postBlockSplitter`
to better qualify the difference between the 2 settings.
 2024-10-28 16:31:15 -07:00
Yann Collet 4e1a87976f update regression results 2024-10-25 16:33:00 -07:00
Yann Collet 5b4ce643f0 update ZSTD_splitBlock() documentation 2024-10-25 16:25:02 -07:00
Yann Collet e557abc8a0 new block splitting variant _fromBorders 
less precise but still suitable for `fast` strategy.
 2024-10-25 16:13:55 -07:00
Yann Collet c63b5d2294 update regression results 2024-10-24 14:47:55 -07:00
Yann Collet da2c0dffd8 add faster block splitting heuristic, suitable for dfast strategy 2024-10-24 14:37:00 -07:00
Yann Collet 2366a87ddc fix minor visual conversion warning 2024-10-24 13:38:12 -07:00
Yann Collet ea082692aa added block splitter variant for greedy & lazy (levels 5 to 7) 2024-10-24 13:27:01 -07:00
Yann Collet 326c45bb8e complete sample11 with reduced fingerprint size 2024-10-24 13:17:56 -07:00
Yann Collet ca6e55cbf5 reduce splitBlock arguments 2024-10-24 13:17:56 -07:00
Yann Collet 94d7b07425 organize specialization at recordFingerprint level 2024-10-24 13:17:56 -07:00
Yann Collet 566763fdc9 new variant, sampling by 11 2024-10-24 13:17:56 -07:00
Yann Collet 70c77d20d6 update regression results 
first block is no longer splitted since adding the @savings over-split protection
 2024-10-24 11:43:16 -07:00
Yann Collet 90095f056d apply limit conditions for all splitting strategies 
instead of just for blind split.

This is in anticipation of adversarial input,
that would intentionally target the sampling pattern of the split detector.

Note that, even without this protection, splitting can never expand beyond ZSTD_COMPRESSBOUND(),
because this upper limit uses a 1KB block size worst case scenario,
and splitting never creates blocks thath small.

The protection is more to ensure that data is not expanded by more than 3-bytes per 128 KB full block,
which is a much stricter limit.
 2024-10-24 11:36:56 -07:00
Yann Collet bbda1acf85 update regression results 2024-10-23 15:56:56 -07:00
Yann Collet c80645a055 stricter limits to ensure expansion factor with blind-split strategy 
issue reported by @terrelln
 2024-10-23 14:55:10 -07:00
Yann Collet 7d3e5e3ba1 split all full 128 KB blocks 
this helps make the streaming behavior more consistent,
since it does no longer depend on having more data presented on the input.

suggested by @terrelln
 2024-10-23 14:18:48 -07:00
Yann Collet b68ddce818 rewrite fingerprint storage to no longer need 64-bit members 
so that it can be stored using standard alignment requirement (sizeof(void*)).

Distance function still requires 64-bit signed multiplication though,
so it won't change the issue regarding the bug in ubsan for clang 32-bit on github ci.
 2024-10-23 11:50:57 -07:00
Yann Collet 18b1e67223 fixed extraneous return 
strict C90 compliance test
 2024-10-23 11:50:57 -07:00
Yann Collet d2eeed53dc updated compression results 
due to integration of `sample5` strategy, leading to better compression ratios on a range of levels
 2024-10-23 11:50:57 -07:00
Yann Collet 0be334d208 fixes static state allocation check 
detected by @felixhandte
 2024-10-23 11:50:57 -07:00
Yann Collet 06b7cfabf8 rewrote ZSTD_cwksp_initialAllocStart() to be easier to read 
following a discussion with @felixhandte
 2024-10-23 11:50:57 -07:00
Yann Collet 16450d0732 rewrite penalty update 
suggested by @terrelln
 2024-10-23 11:50:57 -07:00
Yann Collet 1ec5f9f1f6 changed loop exit condition so that there is no need to assert() within the loop. 2024-10-23 11:50:57 -07:00
Yann Collet 4662f6e646 renamed: FingerPrint => Fingerprint 
suggested by @terrelln
 2024-10-23 11:50:57 -07:00
Yann Collet ea85dc7af6 conservatively estimate over-splitting in presence of incompressible loss 
ensure data can never be expanded by more than 3 bytes per full block.
 2024-10-23 11:50:57 -07:00
Yann Collet 5ae34e4c96 ensure lastBlock is correctly determined 
reported by @terrelln
 2024-10-23 11:50:57 -07:00
Yann Collet 7bad787d8b made ZSTD_isPower2() an inline function 2024-10-23 11:50:57 -07:00
Yann Collet a167571db5 added a faster block splitter variant 
that samples 1 in 5 positions.

This variant is fast enough for lazy2 and btlazy2,
but it's less good in combination with post-splitter at higher levels (>= btopt).
 2024-10-23 11:50:57 -07:00
Yann Collet 1c62e714ab minor split optimization 
let's fill the initial stats directly into target fingerprint
 2024-10-23 11:50:57 -07:00
Yann Collet dac26eaeac updated regression test results 2024-10-23 11:50:57 -07:00
Yann Collet cae8d13294 splitter workspace is now provided by ZSTD_CCtx* 2024-10-23 11:50:56 -07:00
Yann Collet 4685eafa81 fix alignment test 
for non 64-bit systems
 2024-10-23 11:50:56 -07:00
Yann Collet 433f4598ad fixed minor conversion warnings on Visual 2024-10-23 11:50:56 -07:00
Yann Collet 73a6653653 ZSTD_splitBlock_4k() uses externally provided workspace 
ideally, this workspace would be provided from the ZSTD_CCtx* state
 2024-10-23 11:50:56 -07:00
Yann Collet 7f015c2fd7 replaced uasan32 test by asan32 test 2024-10-23 11:50:56 -07:00
Yann Collet 31d48e9ffa fixing minor formatting issue in 32-bit mode with logs enabled 2024-10-23 11:50:56 -07:00
Yann Collet 76ad1d6903 fixed VS2010 solution 2024-10-23 11:50:56 -07:00
Yann Collet cdddcaaec9 new Makefile target mesonbuild 
for easier local testing
 2024-10-23 11:50:56 -07:00
Yann Collet 6939235f01 fixed meson build 2024-10-23 11:50:56 -07:00
Yann Collet 80a912dec1 fixed zstreamtest 2024-10-23 11:50:56 -07:00
Yann Collet 6dc52122e6 fixed c90 comment style 2024-10-23 11:50:56 -07:00
Yann Collet 20c3d176cd fix assert 2024-10-23 11:50:56 -07:00
Yann Collet 0d4b520657 only split full blocks 
short term simplification
 2024-10-23 11:50:56 -07:00
Yann Collet dd38c677eb fixed single-library build 2024-10-23 11:50:56 -07:00
Yann Collet 8b3887f579 fixed kernel build 2024-10-23 11:50:56 -07:00
Yann Collet f83ed087f6 fixed RLE detection test 2024-10-23 11:50:56 -07:00
Yann Collet 83a3402a92 fix overlap write scenario in presence of incompressible data 2024-10-23 11:50:56 -07:00
Yann Collet fa147cbb4d more ZSTD_memset() to apply 2024-10-23 11:50:56 -07:00
Yann Collet 6021b6663a minor C++-ism 
though I really wonder if this is a property worth maintaining.
 2024-10-23 11:50:56 -07:00
Yann Collet e2d7d08888 use ZSTD_memset() 
for better portability on Linux kernel
 2024-10-23 11:50:56 -07:00
Yann Collet 586ca96fec do not use new as variable name 2024-10-23 11:50:56 -07:00
Yann Collet 9e52789962 fixed strict C90 semantic 2024-10-23 11:50:56 -07:00
Yann Collet a5bce4ae84 XP: add a pre-splitter 
instead of ingesting only full blocks, make an analysis of data, and infer where to split.
 2024-10-23 11:50:56 -07:00
Yann Collet 41d870fbbf updated regression tests results 2024-10-17 11:06:26 -07:00
Yann Collet ff8e98bebe enable regression tests at pull request time 
was transferred from circleci,
but was only triggered on push into dev,
i.e. after pull request is merged.
 2024-10-17 09:45:16 -07:00
Yann Collet 47d4f5662d rewrite code in the manner suggested by @terrelln 2024-10-17 09:37:23 -07:00
Yann Collet 61d08b0e42 fix test 
a margin of 4 is insufficient to guarantee compression success.
 2024-10-17 09:37:23 -07:00
Yann Collet 6326775166 slightly improved compression ratio at levels 3 & 4 
The compression ratio benefits are small but consistent, i.e. always positive.
On `silesia.tar` corpus, this modification saves ~75 KB at level 3.
The measured speed cost is negligible, i.e. below noise level, between 0 and -1%.
 2024-10-17 09:37:23 -07:00
Yann Collet 730d2dce41 fix test 2024-10-15 18:44:40 -07:00
Yann Collet c2abfc5ba4 minor improvement to level 3 dictionary compression ratio 2024-10-15 17:58:33 -07:00
Yann Collet e63896eb58 small dictionary compression speed improvement 
not as good as small-blocks improvement,
but generally positive.
 2024-10-15 17:48:35 -07:00
Yann Collet e6740355e3 attempt parallel test running with -j 2024-10-11 18:01:28 -07:00
Yann Collet 6f2e29a234 measure if -O2 makes the test complete faster 2024-10-11 17:30:55 -07:00
Yann Collet 1024aa9252 attempt to make 32-bit tests faster 
this is the longest CI test, reaching ~40mn on last PR
 2024-10-11 16:24:25 -07:00
Yann Collet 8e5823b65c rename variable name 
findMatch -> matchFound
since it's a test, as opposed to an active search operation.
suggested by @terrelln
 2024-10-11 15:38:12 -07:00
Yann Collet 83de00316c fixed parameter ordering in dfast 
noticed by @terrelln
 2024-10-11 15:36:15 -07:00
Yann Collet 3b343dcfb1 refactor huffman prefix code paragraph 2024-10-07 17:15:07 -07:00
Yann Collet b84653fc83 fix dependency for nightly github actions tests 2024-10-03 15:10:16 -07:00
Yann Collet a8b86d024a refactor documentation of the FSE decoding table build process 2024-10-02 23:09:06 -07:00
Yann Collet de6cc98e07 fix incorrect pointer manipulation 
fix #4155
 2024-10-01 09:25:26 -07:00
Yann Collet 3d5d3f5630 removing nightly tests built on circleci 2024-09-30 21:38:29 -07:00
Yann Collet 039f404faa update documentation to specify that Dictionary can be used for benchmark 
fix #4139
 2024-09-25 16:56:01 -07:00
Yann Collet 7a48dc230c fix doc nit: ZDICT_DICTSIZE_MIN 
fix #4142
 2024-09-19 09:50:30 -07:00
Yann Collet 09cb37cbb1 Limit range of operations on Indexes in 32-bit mode 
and use unsigned type.
This reduce risks that an operation produces a negative number when crossing the 2 GB limit.
 2024-08-21 11:03:43 -07:00
Yann Collet 14b8d398fd fix c90 comment style 2024-08-06 12:47:30 -07:00
Yann Collet 89451cafbd formatString_u() can display numbers > 100 
fixes #4110
 2024-08-06 11:44:37 -07:00
Yann Collet cb784edf5d added android-ndk-build 2024-07-30 11:34:49 -07:00
Yann Collet 80170f6aad fix macos build 
weird: after replacing the UNAME line with an identical one,
it does work properly now(??).
Possibly a case of hidden special character?
 2024-06-18 20:24:00 -07:00
Yann Collet d7a84a683f added cygwin install test 2024-06-12 10:57:15 -07:00
Yann Collet 2acf90431a minor:doc: specify decompression behavior in presence of multiple concatenated frames 
directly at ZSTD_decompress() level.
 2024-06-03 18:30:23 -07:00
Yann Collet a86f5f3f33 update documentation of ZSTD_decompressStream() 
slightly more precise, by recommending to check the return value.
fix #4030
 2024-04-23 09:31:35 -07:00
Yann Collet ff7a151f2e update test name 2024-04-21 10:44:50 -07:00
Yann Collet a2f145f059 decompression errors always display the full origin filename 
instead of the truncated size-limited version.
 2024-04-01 11:49:21 -07:00
Yann Collet e0ee0fccf8 updated benchmarks for v1.5.6 2024-03-27 18:19:31 -07:00
Yann Collet ebf24b7b77 fix nodejs deprecation warning 
by updating msys2 action
 2024-03-27 16:10:15 -07:00
Yann Collet 273d1279ca try to silence some scorecard warnings 2024-03-21 13:25:48 -07:00