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420 Commits

Author SHA1 Message Date
Yann Collet
62568c9a42 added capability to generate magic-less frames 
decoder not implemented yet
 2017-09-25 14:26:26 -07:00
Nick Terrell
bbe77212ef [libzstd] Increase MaxOff 2017-09-25 13:36:18 -07:00
Yann Collet
8977224b9b Merge pull request #859 from terrelln/31 
Prepare for ZSTD_WINDOWLOG_MAX == 31
 2017-09-22 09:01:39 -07:00
Nick Terrell
d6abb28951 Prepare for ZSTD_WINDOWLOG_MAX == 31 2017-09-21 17:18:41 -07:00
Yann Collet
cd3115b284 added control from frame content size at end of decompression 
adding check at end of single-pass ZSTD_decompressFrame().
Check within ZSTD_decompressContinue() was already added in a previous patch : b3f33ccfb3
 2017-09-21 16:21:10 -07:00
Nick Terrell
18442a31ff [libzstd] Fix bad window size assert 
The window size is not validated or used in the one-pass API, so there
shouldn't be an assert based on it.

fix-fuzz-failure
 2017-09-19 13:47:59 -07:00
Nick Terrell
5f22479517 [block] Don't use fParams in ZSTD_decompressBlock() 2017-09-15 17:37:20 -07:00
Yann Collet
ce31004f20 fix following suggestions by @terrelln 2017-09-11 13:12:52 -07:00
Yann Collet
b3f33ccfb3 use ZSTD_decodingBufferSize_min() inside ZSTD_decompressStream() 
Use same definition as public one
minor : reduce allocated buffer size in some cases
(when frameContentSize is known and == windowSize)
 2017-09-09 14:37:28 -07:00
Yann Collet
058ed2ad33 ZSTD_decodingBufferSize_min() 
supporting function for bufferless streaming API (ZSTD_decompressContinue())
makes it possible to correctly size a round buffer for decoding using this API.

also : added field blockSizeMax within ZSTD_frameHeader,
as it's a necessary information to know when to restart at beginning of decoding buffer.
 2017-09-09 01:03:29 -07:00
Yann Collet
3128e03be6 updated license header 
to clarify dual-license meaning as "or"
 2017-09-08 00:09:23 -07:00
Yann Collet
8a5c0c98ae restored 32-bits decoder ability to decode long offsets (>32 MB, levels 21+) 2017-09-01 11:56:57 -07:00
Yann Collet
36aa8b5999 improved decoding speed 2017-09-01 11:40:59 -07:00
Yann Collet
3704507774 fixed decompression bug reported by @Etsukata (#828) 2017-09-01 00:05:37 -07:00
Yann Collet
d7ad99b2ab Merge branch 'longRangeMatcher' into dev 2017-08-31 18:08:37 -07:00
Stella Lau
c88fb9267f Replace 'byReference' with enum 2017-08-29 11:55:02 -07:00
Yann Collet
32fb407c9d updated a bunch of headers 
for the new license
 2017-08-18 16:52:05 -07:00
Yann Collet
2dbcfc6994 Merge pull request #794 from terrelln/force-inline 
[libzstd] Fix FORCE_INLINE macro
 2017-08-15 12:03:44 -07:00
Nick Terrell
565e925eb7 [libzstd] Fix FORCE_INLINE macro 2017-08-14 21:12:05 -07:00
Roman Gershman
b9d4f4fb74 Fix ZSTD_estimateDStreamSize function after ZSTD_DStream and ZSTD_DCtx were merged 2017-08-13 13:29:42 +03:00
Nick Terrell
9ba97182d1 [CI] Add gcc7build test 2017-08-08 13:28:56 -07:00
Yann Collet
2bd6440be0 pinned down error code enum values 
Note : all error codes are changed by this new version,
but it's expected to be the last change for existing codes.

Codes are now grouped by category, and receive a manually attributed value.
The objective is to guarantee that
error code values will not change in the future
when introducing new codes.
Intentionnal empty spaces and ranges are defined
in order to keep room for potential new codes.
 2017-07-13 17:12:16 -07:00
Nick Terrell
de0414b736 [libzstd] Pull CTables into sub-structure 2017-07-12 19:49:19 -07:00
Yann Collet
0f4fc6c20a fixed several conversion warnings 2017-07-07 17:13:12 -07:00
Yann Collet
9bde061a0b fixed minor Visual compilation limitation 2017-07-07 16:14:17 -07:00
Yann Collet
593d517ebf fixed minor cast warning 2017-07-07 16:09:47 -07:00
Yann Collet
ead4dd48f6 new field frameHeader.headerSize 2017-07-07 15:51:24 -07:00
Yann Collet
46396523c0 ZSTD_getFrameHeader : control of windowSize limits is delegated to caller 
Extracting frame header is a separate operation.
It's now possible to get frame header, whatever the window size set in it.
 2017-07-07 15:32:12 -07:00
Yann Collet
990449b89d new field : ZSTD_frameHeader.frameType 
Makes frame type (zstd,skippable) detection more straighforward.
ZSTD_getFrameHeader set frameContentSize=ZSTD_CONTENTSIZE_UNKNOWN to mean "field not present"
 2017-07-07 15:21:35 -07:00
Yann Collet
e622330a3b extended frameHeader.windowSize to unsigned long long 2017-07-07 14:19:01 -07:00
Yann Collet
f04deff4fc fixed #718, reported by @GregSlazinski, solution suggested by @mcmilk 2017-07-06 01:42:46 -07:00
Yann Collet
d75c0e71c4 minor code refactoring 2017-07-05 18:10:07 -07:00
Yann Collet
5051dd39ca Merge pull request #743 from facebook/fullbench 
compress_generic() automatic optimization opportunities
 2017-07-03 21:26:38 -07:00
Nick Terrell
c80fc50a8d [libzstd] Fix memcpy() on potential NULL source 
* `ZSTD_decompressStream_generic()` `ip` may be `NULL` for one of the calls
  to `memcpy()`
* Assert the source is not `NULL` for calls to `memcpy()` where I believe
  the source should not be `NULL`.
 2017-07-03 12:31:55 -07:00
Yann Collet
2485f88bf8 fixed legacy version init bug 2017-07-01 09:09:34 -07:00
Yann Collet
7f40bb1c39 Merge pull request #742 from stellamplau/stack-space 
Reduce stack usage of HUF_readDTableX4 and HUF_readDTableX2
 2017-06-30 14:50:23 -07:00
Stella Lau
99e315999c Reduce stack usage of HUF_readDTableX4 and HUF_readDTableX2 2017-06-29 11:49:59 -07:00
Yann Collet
33a6639039 fixed ZSTD_refPrefix with Multithread-enabled CCtx 2017-06-28 11:09:43 -07:00
Yann Collet
7d3816183f exposed ZSTD_MAGIC_DICTIONARY in zstd.h 
makes it easier to explain ZSTD_dictMode
 2017-06-27 13:50:34 -07:00
Yann Collet
c7fb884eea fixed minor conversion warning 2017-06-26 18:02:23 -07:00
Yann Collet
dde10b23fe refactored ZSTD_estimateDStreamSize() 
now uses windowSize as argument.
Also : created ZSTD_estimateDStreamSize_fromFrame()
 2017-06-26 17:44:26 -07:00
Yann Collet
ef269c1b68 Merge pull request #725 from facebook/advancedAPI2 
New Advanced API
 2017-06-23 09:50:47 -07:00
Yann Collet
dce789281b fixed : decompression of skippable frames in streaming mode 2017-06-21 15:53:42 -07:00
Yann Collet
1e4129b27b fixed dangling pointer risk, detected by @terrelln 2017-06-21 13:26:10 -07:00
Yann Collet
e51d51bdf7 fixed memcpy() overlap 2017-06-20 17:44:55 -07:00
Yann Collet
c3bce24ef4 fixed potential dangling pointer, detected by @terrelln 2017-06-20 16:09:11 -07:00
Yann Collet
695a0a3449 fixed IA64 compilation error, by @mcmilk 2017-06-19 15:27:30 -07:00
Paul Cruz
a9b77c83e5 cleaning up code for analyzing frames 2017-06-15 14:13:28 -07:00
Yann Collet
58e8d793e1 made debug definitions common within zstd_internal.h 2017-06-02 18:20:48 -07:00
Yann Collet
8ddf4c22d5 fixed missing initialization 2017-06-02 17:16:49 -07:00
Yann Collet
33a7e679e5 significant zlib wrapper code refactoring 
code indentation
variable scope and names
constify

Only coding style changes.
The logic should remain the same.
 2017-06-02 17:10:49 -07:00
Yann Collet
4effccbf56 zlib_wrapper's uncompress() uses ZSTD_isFrame() for routing 
more generic and safer than using own routing for magic number comparison
 2017-06-02 14:27:11 -07:00
Yann Collet
ae728a43b8 removed defaultCustomMem 
now ZSTD_customCMem is promoted as new default.

Advantages : ZSTD_customCMem = { NULL, NULL, NULL},
so it's natural default after a memset.

ZSTD_customCMem is public constant
(defaultCustomMem was private only).

Also : makes it possible to introduce ZSTD_calloc(),
which can now default to stdlib's calloc()
when it detects system default.

Fixed zlibwrapper which depended on defaultCustomMem.
 2017-05-30 17:11:39 -07:00
Yann Collet
b8136f019a static dctx is incompatible with legacy support 
documented, and runtime tested
 2017-05-27 00:03:08 -07:00
Yann Collet
cdf7e82222 Added ZSTD_initStaticCDict() 2017-05-25 18:05:49 -07:00
Yann Collet
57827f906f added ZSTD_initStaticDDict() 2017-05-25 15:44:06 -07:00
Yann Collet
25989e361c updated ZSTD_estimate?DictSize() to pass parameter byReference 
resulting ?Dict object is smaller when created byReference.
Seems better than a documentation note.
 2017-05-25 15:07:37 -07:00
Yann Collet
0fdc71c3dc added ZSTD_initStaticDCtx() 2017-05-24 17:41:41 -07:00
Yann Collet
ba183005d3 merged DStream's inBuff and outBuff into a single buffer 
Saves one malloc().
Also : makes it easier to implement static allocation
 2017-05-24 15:42:24 -07:00
Nick Terrell
55fc1f91fd [zstd] Fix up formatting edge cases for clang-format 2017-05-24 13:50:10 -07:00
Yann Collet
2e4db3e531 fixed performance regression with ZSTD_decompress() on small files 
memset() was a quick fix to initialization problems,
but initialize too much space (tables, buffers)
which show up in decompression speed of ZSTD_decompress()
since it needs to recreate DCtx at each invocation.

Fixed by only initialization relevant pointers and size fields.
 2017-05-24 13:15:19 -07:00
Yann Collet
11ea2f7fda Merged ZSTD_DCtx and ZSTD_DStream objects 
They are now the same object.
It's recommended to keep both types in source code
as previous versions of library (<v1.3.0)
still need this differentiation.
 2017-05-23 16:19:43 -07:00
Yann Collet
fa3671eac7 changed ZSTD_BLOCKSIZE_ABSOLUTEMAX into ZSTD_BLOCKSIZE_MAX 
Also :
change ZSTD_getBlockSizeMax() into ZSTD_getBlockSize()
created ZSTD_BLOCKSIZELOG_MAX
 2017-05-19 10:51:30 -07:00
Yann Collet
7101434ec9 pedantic : added one error check 
on a function which (today) never fails.
But who knows, maybe tomorrow ...
 2017-05-16 16:28:24 -07:00
Yann Collet
4eff8136aa added prototype ZSTD_decompressBegin_usingDDict (#700) 2017-05-16 16:05:27 -07:00
Yann Collet
cef02d9317 changed variable name, for clarity 
fhiPtr -> zfhPtr
https://github.com/facebook/zstd/pull/689#discussion_r115638676
 2017-05-10 11:14:08 -07:00
Yann Collet
f16f4497ca added ZSTD_estimateDStreamSize() 2017-05-09 16:18:17 -07:00
Yann Collet
542c9dfcf8 changed name frameParams into frameHeader 
ZSTD_frameParams => ZSTD_frameHeader
ZSTD_getFrameParams() -> ZSTD_getFrameHeader()

The new naming is more distinctive from ZSTD_frameParameters,
which is used during compression.

ZSTD_frameHeader is clearer in its intention to described frame header content.
It also implies we are decoding a ZSTD frame, hence we are at decoding stage.
 2017-05-09 15:46:07 -07:00
Yann Collet
a1d6704d7f added ZSTD_estimateCDictSize() and ZSTD_estimateDDictSize() 
it complements ZSTD_estimateCCtxSize()
for the special case of ZSTD_initCStream_usingDict()
 2017-05-08 17:51:49 -07:00
Yann Collet
b184589c4c minor code refactoring for clarity 2017-05-01 11:35:47 -07:00
Yann Collet
89f50deec7 minor code refactoring 
clearer tables
 2017-04-28 16:52:36 -07:00
Yann Collet
003a244324 DStream : ensure correct size of internal buffers in case of error 2017-04-05 15:28:56 -07:00
Sean Purcell
4708394bdd Remove extra 'F' from skippable magic mask 2017-03-29 11:46:57 -07:00
Nick Terrell
eaf69b07f0 Zero pointers after freeing 2017-03-21 13:20:59 -07:00
Sean Purcell
334cb34edb ZSTD_LEGACY_SUPPORT defines lowest supported version 2017-03-13 14:32:30 -07:00
Sean Purcell
784082f49c Change gotoDict type to uPtrDiff 2017-03-10 10:34:45 -08:00
Sean Purcell
8fe5c6862c Fix undefined behaviour in decompressor 2017-03-10 10:17:42 -08:00
Yann Collet
fe5d27062e disable prefetch-decode for 32-bits target 
This decoder variant is detrimental to x86 architecture
likely due to register pressure.

Note that the variant is disabled for all 32-bits targets.
It's unclear if it would help for different architectures,
such as ARM, MIPS or PowerPC.
 2017-03-02 17:09:21 -08:00
Sean Purcell
3d95925a59 Merge remote-tracking branch 'origin/dev' into m32 2017-03-02 15:17:56 -08:00
Yann Collet
fdb0fd34b3 Merge pull request #583 from terrelln/set-dictid 
Set dictID to 0 for content only dictionaries
 2017-03-02 13:15:31 -08:00
Nick Terrell
3475b9b431 Set dictID to 0 for content only dictionaries 2017-03-02 12:33:02 -08:00
Sean Purcell
d44703d145 Offsets >= 32MB in 32-bits mode 2017-03-01 16:27:56 -08:00
Yann Collet
4bcc69b761 solves warnings when compiling with global XXH_STATIC_LINKING_ONLY 
XXH_STATIC_LINKING_ONLY protection macro is intended to be triggered just before the include.
The main idea is to keep this setting local :
user module shall explicitly understand and accept the static linking restriction
which becomes transparent when triggering the macro at project level.
Global definition also triggers redefinition warnings for user modules which do locally define the macro.

This new version compiles lib and cli without warning when the macro is set globally.
That's not a scenario to be recommended, since it trades a local effect for a global one,
but it was easy enough to provide from zstd side.
 2017-03-01 11:33:25 -08:00
Yann Collet
31432cc57d Merge pull request #579 from iburinoc/multiframe 
Check to ensure ddict isn't null before dereference
 2017-03-01 11:02:04 -08:00
Sean Purcell
a81d4fee58 Check to ensure ddict isn't null before dereference 2017-02-28 15:28:29 -08:00
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
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
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
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
Yann Collet
3c6b808870 minor decompression speed gains 2016-07-30 03:20:47 +02:00
Yann Collet
c00d30fbe4 Merge pull request #264 from inikep/dev08 
Dev08
 2016-07-29 17:42:30 +02:00
Yann Collet
4c5bbf64f9 fixed : frame concatenation without checksum 2016-07-28 20:30:25 +02:00
Yann Collet
60ba31c570 zbuff uses ZSTD_compressEnd() 2016-07-28 19:55:09 +02:00
Yann Collet
c991cc1828 new frame end, 32-bits checksums 2016-07-28 00:55:43 +02:00
inikep
003c7a8568 optimal parser: removed ZSTD_REP_INIT 2016-07-27 11:07:13 +02:00
Eric Biggers
0a55e7a0bb ZSTD_decompressFrame(): use remainingSize instead of iend - ip 
Same behavior, but no need to have redundant variables.
 2016-07-26 13:22:27 -07:00
Eric Biggers
aa6c70bf60 ZSTD_decompressFrame(): pass up error code from ZSTD_decodeFrameHeader() 2016-07-26 13:22:27 -07:00
Eric Biggers
e4d0265ea9 Replace remaining references to "direct mode" with "single segment mode" 2016-07-26 13:22:27 -07:00
Yann Collet
cbc5e9dc19 fixes oob read 2016-07-24 18:02:04 +02:00
Yann Collet
7ed5e33b89 minor comment changes 2016-07-24 14:26:11 +02:00
Yann Collet
10b9c13d07 fixed doc on cLevel default, reported by Oliver Lange 2016-07-24 01:21:53 +02:00
Yann Collet
f8e7b5363f unified encoding types 2016-07-23 16:31:49 +02:00
Yann Collet
c2e1a68d81 changed streamNb order to 1-4-4-4 2016-07-22 17:30:52 +02:00
Yann Collet
772d912c2f more complete support for literals repeat mode 2016-07-22 15:04:25 +02:00
Yann Collet
9f2d82d4a4 fixed : big-endian decoding 2016-07-22 14:37:10 +02:00
Yann Collet
32faf6c8e7 fixed conversion warnings 2016-07-22 14:37:09 +02:00
Yann Collet
5e45a5fbb3 force loop-align to 32 for zstd_decompress 2016-07-22 14:37:09 +02:00
Yann Collet
5288ac0cb7 changed filed order 2016-07-22 14:37:09 +02:00