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483 Commits

Author SHA1 Message Date
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
a41a4ed39a Merge pull request #594 from terrelln/bugs 
Small fixes
 2017-03-08 14:56:07 -08:00
Nick Terrell
81512e9ebe Avoid '#define inline /* ... */' 
Take definition of `FORCE_INLINE` from `zstd_internal.h`.
 2017-03-08 14:00:21 -08:00
Yann Collet
1f2c95c5f3 minor code refactor in HUF module 2017-03-05 21:07:20 -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
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
Yann Collet
b89af20353 reduced table sizes for HUF_readDTableX4 2016-12-01 18:24:59 -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
af1960396b sync huff0 2016-08-19 19:38:19 +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
Yann Collet
198e6aac44 Literals header fields use little endian convention 2016-07-22 14:37:09 +02:00
Yann Collet
6fa05a2371 cBlockSize uses little-endian convention 2016-07-22 14:37:09 +02:00
Yann Collet
cf05b9d477 ZSTD_getBlockSizeMax() 2016-07-18 16:52:10 +02:00
Yann Collet
972e5806ee fixed : premature frame end on zero-sized raw block - reported by @ebiggers 2016-07-17 15:39:24 +02:00
Yann Collet
d158c35e9f added ZSTD_estimateDCtxSize() 2016-07-11 13:46:25 +02:00
Yann Collet
8e0ee681b8 added ZSTD_sizeofDCtx() 2016-07-11 13:09:52 +02:00
Yann Collet
3ae543ce75 added ZSTD_estimateCCtxSize() 2016-07-11 03:12:17 +02:00
Yann Collet
722e14bb65 fixed compilation error in decompression module 2016-07-08 19:22:16 +02:00
Yann Collet
bd10607063 updated spec 2016-07-08 19:16:57 +02:00
Yann Collet
c5fb5b7fcd support offset > 128 MB 2016-07-08 13:13:37 +02:00
Yann Collet
19c27d27f1 simplified legacy functions, no longer need magic number 2016-07-07 14:40:13 +02:00
Yann Collet
f323bf7d32 added : ZSTD_getDecompressedSize() 2016-07-07 13:14:21 +02:00
Yann Collet
f246cf5423 ZSTD_decompress_usingDDict() compatible with Legacy mode 2016-07-06 20:32:27 +02:00
Yann Collet
517e1ba623 fixed dictBuilder issue with HC levels. Reported by Bartosz Taudul. 2016-07-06 12:35:09 +02:00
Yann Collet
fe07eaa972 simplified ZSTD_decodeSequence() 2016-07-06 02:25:44 +02:00
Yann Collet
9ca73364e6 updated spec 2016-07-05 10:53:38 +02:00
Yann Collet
f9cac7a734 Added GNU separator --, to specifies that all following arguments are necessary file names (and not commands). Suggested by @chipturner (#230) 2016-07-04 18:18:24 +02:00
Yann Collet
23f05ccc6b updated specifications 2016-07-04 16:13:11 +02:00
Yann Collet
2fa9904844 update specification and comments 2016-07-01 20:55:28 +02:00
Yann Collet
c093208ab8 fix : potential leak (#229) 2016-06-30 14:07:30 +02:00
Yann Collet
d4f4e58ee1 fixed ZSTD_decompressBlock() using multiple blocks 2016-06-27 01:31:35 +02:00
Yann Collet
e4811ba761 Modified : ZSTD_createDDict() accepts dictionary < 8 bytes in pure content mode (reported by @chipturner) 2016-06-19 23:06:54 +02:00
Yann Collet
06d9a73b48 minor refactor, using WILDCOPY_OVERLENGTH macro instead of hard-coded 8 2016-06-19 14:27:21 +02:00
Yann Collet
4948f270b3 make room for reserved "information bit" in frame header 2016-06-16 15:38:51 +02:00
Yann Collet
80d033fb43 fixed ptr arithmetic warning 2016-06-16 01:41:50 +02:00
Yann Collet
736d419289 strengthened dict loading on decompresson side 2016-06-16 01:05:04 +02:00
Yann Collet
8e36a9c169 decoder restores repOffsets from dictionary 2016-06-16 01:05:04 +02:00
Yann Collet
9b998e4d08 Fixed decompression of literals in dictionary mode 2016-06-15 23:11:20 +02:00
Yann Collet
d059092897 fixed conversion warnings 2016-06-14 15:34:24 +02:00
Yann Collet
4266c0a2fd adding inter-blocks rep-offsets 2016-06-14 01:49:25 +02:00
Yann Collet
cd98f93cff Fixed decompression issue with invalid data 2016-06-11 23:26:22 +02:00
Yann Collet
37fece22e8 enable repeat-entropic-stats mode 2016-06-11 02:52:42 +02:00
Yann Collet
d60a5bf900 Literal decompression builds Huffman tables within shared space (for later re-use) 2016-06-11 02:35:31 +02:00
Yann Collet
237ad4beb3 Added single-stream decompression variant using external DTable 2016-06-11 01:46:03 +02:00
Yann Collet
289bbd52e5 Updated huff0 2016-06-11 01:31:54 +02:00
Yann Collet
9dd12742f3 litBlockType_t is an enum 2016-06-10 00:12:26 +02:00
Yann Collet
662a541431 updated huff0 - now generates a common HUF_DTable type for all decoding tables 2016-06-08 11:11:02 +02:00
Yann Collet
302fb53a76 Removed ZSTD_*_usingPrepared?Ctx() declaration from public space 2016-06-07 12:16:49 +02:00
Yann Collet
81e13ef7cf first implementation of the new dictionary API (untested) 2016-06-07 00:51:51 +02:00
Yann Collet
9d504ae85b Added decoding of RLE blocks 2016-06-06 19:52:35 +02:00
Yann Collet
673f0d7cdc new frame format, allowing custom window size 2016-06-06 00:26:38 +02:00
Yann Collet
d0e2cd15cb Merged fse_static into fse.h . Now requires FSE_STATIC_LINKING_ONLY macro. 2016-06-05 00:58:01 +02:00
Yann Collet
130fe11394 merged huf_static.h into huf.h . Requires HUF_STATIC_LINKING_ONLY macro. 2016-06-05 00:42:28 +02:00
Yann Collet
d3b7f8d21f Merged zstd_static.h into zstd.h . Now requires ZSTD_STATIC_LINKING_ONLY macro 2016-06-04 19:47:02 +02:00
Yann Collet
ac110a1f21 Removed ZBUFF internal util function from public area 2016-06-04 19:16:49 +02:00
Yann Collet
5347aee8f7 merged zbuff_static.h into zbuff.h . Now requires ZBUFF_STATIC_LINKING_ONLY macro 2016-06-04 19:12:48 +02:00
Yann Collet
198d127b35 minor comment change (unfinished description of new header format) 2016-06-04 18:40:55 +02:00
Yann Collet
f4f5affdf7 restore ZBUFF full-block-size, for better performance on small input 2016-06-03 23:09:28 +02:00
Yann Collet
ab7b6f1ece Merge pull request #198 from inikep/dev070 
Dev070
 2016-06-03 21:37:49 +02:00
inikep
3640396b1a fixed: deallocation of structures in case of error in ZBUFF_createCCtx and ZBUFF_createDCtx 2016-06-03 16:36:50 +02:00
Yann Collet
fe48775868 minor decoder code refactoring 2016-06-03 15:41:51 +02:00
inikep
3763c77f6b defaultCustomNULL replaced with defaultCustomMem 2016-06-03 13:28:20 +02:00
inikep
36fac00149 removed calloc calls from lib/ 2016-06-03 13:23:04 +02:00
inikep
db2f540414 added defaultCustomNULL 2016-06-03 12:56:56 +02:00
inikep
2866951558 opaque parameter for custom memory allocation functions 2016-06-02 13:04:18 +02:00
inikep
9242816b56 fparamsPtr->windowLog==0 means that a frame is skippable 2016-06-01 18:47:04 +02:00
inikep
13f42d9085 VS2010 project: reverted zstdlib.rc 2016-06-01 14:44:31 +02:00
inikep
5c2771710d Merge remote-tracking branch 'refs/remotes/Cyan4973/dev070' into dev070 
# Conflicts:
#	.gitignore
#	lib/decompress/zstd_decompress.c
#	programs/zbufftest.c
 2016-06-01 09:16:11 +02:00
Yann Collet
202844ebd0 fixed zbufftest : 2016-06-01 00:44:36 +02:00
Yann Collet
8e3a36a6db decompression validates frame content checksum 2016-06-01 00:18:28 +02:00
inikep
a6b942018d Merge remote-tracking branch 'refs/remotes/origin/dev' into dev070 
# Conflicts:
#	.travis.yml
#	Makefile
#	lib/common/zstd_static.h
#	programs/Makefile
#	projects/VS2008/zstd/zstd.vcproj
#	projects/VS2008/zstdlib/zstdlib.vcproj
#	projects/cmake/lib/CMakeLists.txt
#	projects/cmake/programs/CMakeLists.txt
 2016-06-01 00:07:09 +02:00
Yann Collet
f2a3b6e7b4 added : frame content checksum 2016-05-31 22:23:45 +02:00
inikep
43aa9fe8b3 fixed skippable frame 2016-05-31 19:36:51 +02:00
inikep
f772bf54a5 support for skippable frames 2016-05-31 12:43:46 +02:00
Yann Collet
30009521d7 fuzzer tests dictBuilder. 
Added : ability to not store dictID during compression; decompression doesn't check dictID then
 2016-05-30 16:17:33 +02:00
Yann Collet
c46fb924df added dictionary ID (incomplete) 2016-05-29 05:01:04 +02:00
inikep
02c244bf78 Merge remote-tracking branch 'refs/remotes/Cyan4973/dev' into dev 2016-05-24 17:15:04 +02:00
inikep
13ba880b49 added ZBUFF_createCCtx_advanced and ZBUFF_createDCtx_advanced 2016-05-23 17:04:23 +02:00
inikep
107e243195 added ZSTD_createDCtx_advanced 2016-05-23 16:24:52 +02:00
Yann Collet
f22a0d653d huff0 dynamic reduction 2016-05-20 14:36:36 +02:00
Yann Collet
ccd6e86d45 improved decoding speed by inlining x_isError() functions 2016-05-12 15:55:26 +02:00
Yann Collet
b19d5d76ec restored inline for better decompression speed 2016-05-12 14:06:31 +02:00
Yann Collet
1032fbe714 update FSE library 2016-05-11 18:30:24 +02:00
Yann Collet
b3a9938d0c Merge pull request #182 from inikep/dev 
support for Visual Studio 2012, 2013, 2015
 2016-05-10 17:18:12 +02:00
Yann Collet
bd39d54576 zbuff supports byte-by-byte decompression scenarios 2016-05-10 14:14:19 +02:00
inikep
ed9a08538c Merge remote-tracking branch 'refs/remotes/Cyan4973/dev' into dev 
# Conflicts:
#	lib/common/util.h
#	programs/paramgrill.c
#	visual/2013/fullbench/fullbench.vcxproj.filters
#	visual/2013/fuzzer/fuzzer.vcxproj.filters
 2016-05-10 13:20:01 +02:00
inikep
aaaf923a17 common/util.h moved to programs/util.h 
decompress/fse_decompress.c moved to common/
 2016-05-09 16:19:25 +02:00
Yann Collet
a5dacdf551 updated fse (minor refactor) 2016-05-06 16:55:27 +02:00
Yann Collet
18dedece91 Support legacy ZSTD_decompress_usingDict() (starting v0.5+) 2016-05-06 16:43:23 +02:00
Yann Collet
6d1d25299a fixed Huff0 quad-symbols decoder (#173) 2016-05-05 12:41:36 +02:00
Yann Collet
3f8ed50bf1 Added gnu90 test 
work-around : disabled automatic selection of huff0 quad-decoder (see #173)
 2016-05-05 03:01:13 +02:00
Yann Collet
6f9c056662 Fixed BMI behavior on x86 and x32 targets, reported by @tycho (#178) 2016-05-01 10:26:30 +02:00
inikep
db3964382c introduced ZSTD_NODECOMPRESS to link only compressor 2016-04-22 18:22:30 +02:00
inikep
a1febea01d Error functions moved to common/zstd_common.c 2016-04-22 17:14:25 +02:00
inikep
3c7c3527d0 introduced ZSTD_NOCOMPRESS to generate decompressor only 2016-04-22 13:59:05 +02:00
inikep
23a0889301 separation of lib/ into common/, compress/, decompress/, dictBuilder/, legacy/ 2016-04-22 12:43:18 +02:00