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579 Commits

Author SHA1 Message Date
Yann Collet
100d8ad6be lib/compress: created ZSTD_LLcode() and ZSTD_MLcode() 
transform length into code.
Since transformation is needed in several places throughout the code,
better write the logic in one place.
 2017-11-08 12:43:05 -08:00
Yann Collet
ee441d5d2b renamed zstd_compress.h into zstd_compress_internal.h 
to emphasize the fact that all definitions it contains
must remain private, accross lib/compress modules.
 2017-11-07 16:15:23 -08:00
Yann Collet
150354c5fe minor refactor 
added some traces and assert
related to hunting a potential ubsan error in 32-bits more
(it ends up being a compiler-side issue : https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82802).

Modified one pointer arithmetic expression for a more conformant way.
 2017-11-01 16:57:48 -07:00
Yann Collet
428e8b3bf4 fix : ZSTD_compress_generic(,,,ZSTD_e_end) automatically sets pledgedSrcSize 
as per documentation, on ZSTD_setPledgedSrcSize() :
> If all data is provided and consumed in a single round,
> this value (pledgedSrcSize) is overriden by srcSize instead.

This wasn't applied before compression level is transformed into compression parameters.
As a consequence, small input missed compression parameters adaptation.

It seems to work fine now : compression was compared with ZSTD_compress_advanced(),
results were the same.
 2017-11-01 13:15:23 -07:00
Nick Terrell
86b8134cad [libzstd] Fix parameter selection for empty input 
ZSTD_compress() and friends would treat an empty input as an unknown size
when selecting parameters. Thus, they would drastically overallocate the
context. Tell ZSTD_getParams() that the source size is 1 when it is empty.
 2017-10-25 17:24:15 -07:00
Yann Collet
1ff8a8c109 Merge pull request #891 from facebook/contentSize 
Content size
 2017-10-17 17:24:51 -07:00
Yann Collet
13bfe885aa edited ZSTD_initCStream_advanced() comment 2017-10-16 14:06:22 -07:00
Nick Terrell
7f961ba6cd Don't allow default tables to repeat 
It isn't useful in any case to repeat default tables.
Saves a few bytes on Silesia, since we don't trigger the dictionary
heuristic.

Before: 211988480 => 73651998 bytes
After:  211988480 => 73651721 bytes
 2017-10-16 11:37:56 -07:00
Yann Collet
fc8d293460 dictionary compression use correct file size estimation 
when determining compression parameters
to compress one file only.

For multiple files, it still "bets" that files are going to be small.

There was also a bug recently added in ZSTD_CCtx_loadDictionary_advanced()
making it incapable to use pledgedSrcSize to determine compression parameters.
 2017-10-14 01:21:43 -07:00
Yann Collet
213ef3b510 fixed ZSTD_initCStream_advanced() behavior, which depends on contentSizeFlag, 
and a stream fuzzer test, which was incorrect
(relied on 0 being unconditionnally transformed into `ZSTD_CONTENTSIZE_UNKNOWN`)
 2017-10-13 19:01:58 -07:00
Yann Collet
3c1e3f8ec9 contentSizeFlag enabled by default would also fail for streaming and MT operations 
fixed
 2017-10-13 18:32:06 -07:00
Yann Collet
fb44516641 ensure fParams.contentSizeFlag starts at 1 
such default was failing for ZSTD_compressBegin/ZSTD_compressContinue
fixed too
 2017-10-13 17:39:13 -07:00
Yann Collet
dd18d73e7e fileio: content size is enabled by default 2017-10-13 16:32:18 -07:00
Nick Terrell
ced6e6189c Add DEBUGLOG() that prints FSE encoding types 2017-10-13 14:55:23 -07:00
Nick Terrell
24ac2dbd2a Fix invalid use of dictionary offcode table 
Fixes #888.
 2017-10-13 12:47:03 -07:00
Yann Collet
a9e5705077 minor code formatting 
added a trace during sequence encoding
 2017-10-13 02:36:16 -07:00
Nick Terrell
a86a7097ec Ensure dictionary Huff table can encode any symbol 
* Ensure that the dictionary Huffman CTable has maxSymbolValue 255.
* Fix a stack buffer overflow during compression dictionary loading.
 2017-10-03 13:22:13 -07:00
Yann Collet
004fd34fd9 Merge pull request #876 from facebook/srcSize 
CLI Fix : srcSize written in frame headers when compressing multiple files
 2017-10-02 15:02:05 -07:00
Nick Terrell
86e83e926f [libzstd] Set CLEVEL_CUSTOM correctly 
In `ZSTD_compressBegin_advanced()`, `ZSTD_parameters` are used to set the
compression parameters, but the level didn't get set to `CLEVEL_CUSTOM`, so
`ZSTD_compressBlock()` used the wrong parameters when checking the source
size.
 2017-10-02 13:43:30 -07:00
Yann Collet
6e930c13d1 Merge branch 'dev' into compressBound 2017-10-01 11:24:02 -07:00
Yann Collet
dc404119e5 ZSTD_adjustCParams_internal : minor optimization 2017-09-30 15:02:40 -07:00
Nick Terrell
c5d6dde502 Don't size -= 1 in ZSTD_adjustCParams() 
The window size could end up too small if the source size is 2^n + 1.

Credit to OSS-Fuzz
 2017-09-30 14:20:06 -07:00
Yann Collet
5b10345b26 added ZSTD_COMPRESSBOUND() as a macro 
ZSTD_compressBound() works fine, but is only useful for dynamic allocation.
For static allocation, only a macro can provide the amount during compilation time.
 2017-09-29 23:17:41 -07:00
Yann Collet
8afb151c9b cli: fixed wrong initialization in MT mode 
It's not good to mix old and new API
ZSTD_resetCStream() doesn't just set pledgedSrcSize :
it also sets the CCtx for a single thread compression.

Problem is, when 2+ threads are defined in cctx->requestedParams,
ZSTD_compress_generic() will want to start MT compression,
since initialization is supposed to have already happened (thanks to ZSTD_resetCStream())
except that the underlying ZSTDMT_CCtx* object is not created,
resulting in a segfault.

This is an invalid construction
(correct one is to use ZSTD_CCtx_setPledgedSrcSize()).
I haven't found a nice way to mitigate this impact if someone makes the same mistake.

At some point, removing the old API to keep only the new API within fileio.c will limit these risks.
 2017-09-29 22:14:37 -07:00
Yann Collet
fbd5ab7027 minor fix : no longer use fake srcSize during resource creation 
srcSize is read and provided at each file, not at resource creation.
This used to be useful with older API, because it could not re-adapt parameters between sessions.

At some point, it will be better to remove the old code, and only keep the new_api.
It works fine by now.
 2017-09-29 19:40:27 -07:00
Yann Collet
db1668a43b fix : srcSize written in frame header when multiple files compressed 
This information used to be disabled when nbFiles>1.
It was badly initialized later in the code, resulting in an error.
 2017-09-29 18:05:18 -07:00
Yann Collet
86b4fe5b45 adjustCParams : restored previous behavior 
unknowns srcSize presumed small if there is a dictionary (dictSize>0)
and presumed large otherwise.
 2017-09-28 18:14:28 -07:00
Yann Collet
e4ec427720 Merge branch 'dev' into shorterTests 
fixed conflicts
 2017-09-28 12:19:28 -07:00
Yann Collet
8074261d00 zstdmt : move on when not enough memory for a new input buffer 
just continue operations without input forward progress,
instead of an error that stops current compression session.
 2017-09-28 11:46:19 -07:00
Yann Collet
2cd15dd9a4 fixed minor Visual conversion warning 2017-09-28 02:33:41 -07:00
Yann Collet
9b5b47ac93 ensure adjustCParams adjust hLog and cLog even without srcSize 
It would previously exit when srcSize is unknown.
But in the case of custom parameters,
hLog and cLog can still be too large in comparison with windowLog.

Reduces maximum memory allocated during zstreamtest --newapi
 2017-09-28 01:25:40 -07:00
Yann Collet
54a827fff0 Merge branch 'dev' into newFormats 
Fixed conflicts in zstdmt_compress.c
 2017-09-27 16:39:40 -07:00
Yann Collet
c994932788 fixed ZSTD_format_e value validation 2017-09-27 12:22:22 -07:00
Yann Collet
ecf1778e23 updated ZSTD_format_e value validation 
also updated manual
 2017-09-27 11:19:21 -07:00
Yann Collet
9f0b8dfbe9 Merge branch 'dev' into newFormats 2017-09-26 14:22:39 -07:00
Nick Terrell
c233bdbaee Increase maximum window size 
* Maximum window size in 32-bit mode is 1GB, since allocations for 2GB fail
  on my Mac.
* Maximum window size in 64-bit mode is 2GB, since that is the largest
  power of 2 that works with the overflow prevention.
* Allow `--long=windowLog` to set the window log, along with
  `--zstd=wlog=#`. These options also set the window size during
  decompression, but don't override `--memory=#` if it is set.
* Present a helpful error message when the window size is too large during
  decompression.
* The long range matcher defaults to a hash log 7 less than the window log,
  which keeps it at 20 for window log 27.
* Keep the default long range matcher window size and the default maximum
  window size at 27 for the API and CLI.
* Add tests that use the maximum window size and hash size for compression
  and decompression.
 2017-09-26 14:00:01 -07:00
Yann Collet
5d8fdd1641 Merge pull request #855 from terrelln/maxoff 
[libzstd] Increase MaxOff
 2017-09-25 16:34:29 -07:00
Yann Collet
6ee05a02b8 added ZSTD_decompress_generic() 
same as ZSTD_decompressStream(),
just for a similar feeling as the compression side, which uses ZSTD_compress_generic()
 2017-09-25 15:41:48 -07:00
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
96f0cde31a minor function rename 
ZSTD_estimateCStreamSize_advanced_usingCParams -> ZSTD_estimateCStreamSize_usingCParams
_usingX is clear.
_advanced feels redundant
 2017-09-24 16:47:02 -07:00
Yann Collet
7c3dea42ce added prototypes for advanced parameters for decompression API 
required to decode custom formats
 2017-09-24 15:57:29 -07:00
Nick Terrell
d6abb28951 Prepare for ZSTD_WINDOWLOG_MAX == 31 2017-09-21 17:18:41 -07:00
Yann Collet
7d1ff3817b fix ZSTD_sizeof_CCtx() / ZSTD_sizeof_CStream() 
previous result was over-estimated
by counting streaming buffers twice
 2017-09-18 14:47:34 -07:00
Yann Collet
335780c427 fixed too strong alignment assert in ZSTD_initStaticCCtx() 
64-bits fields are only 32-bits aligned on 32-bits CPU
 2017-09-13 16:35:29 -07:00
Yann Collet
f1571dad8f Merge pull request #838 from stellamplau/ldm-mergeDev 
Add long distance matcher
 2017-09-13 13:24:08 -07:00
Stella Lau
eb3327c10a Merge branch 'dev' of https://github.com/facebook/zstd into ldm-mergeDev 2017-09-11 15:00:01 -07:00
Stella Lau
f902bf9676 Merge branch 'ldm-integrate' into ldm-mergeDev 2017-09-11 14:55:29 -07:00
Yann Collet
f325ee4e84 fixed pass-through warning 2017-09-11 14:37:03 -07:00
Stella Lau
0d1b54db61 Explicitly cast raw numerals when left-shifting 2017-09-11 14:28:18 -07:00
Yann Collet
0d6ecc72a3 makes it possible to compile libzstd in single-thread mode without zstdmt_compress.c (#819) 2017-09-11 14:09:34 -07:00
Yann Collet
3128e03be6 updated license header 
to clarify dual-license meaning as "or"
 2017-09-08 00:09:23 -07:00
Stella Lau
360428c5d9 Move ldm functions to their own file 2017-09-06 18:09:26 -07:00
Stella Lau
2b99d696de Remove debug code 2017-09-06 15:57:26 -07:00
Stella Lau
eeff55dfa8 Merge remote-tracking branch 'upstream/dev' into ldm-mergeDev 2017-09-06 15:56:32 -07:00
Yann Collet
ad0046244f Merge pull request #831 from terrelln/split-compress 
Split parsers out of zstd_compress.c
 2017-09-06 10:01:27 -07:00
Stella Lau
9e4060200b Add tests and fix pointer alignment 2017-09-06 09:14:05 -07:00
Stella Lau
c706de5395 Rename and add short ldm parameters in cli 2017-09-05 21:11:18 -07:00
Stella Lau
98b85426f1 Fix setting of nextToUpdate at end of ldm matcher 2017-09-05 20:41:37 -07:00
Nick Terrell
721726d688 Split parsers out of zstd_compress.c 2017-09-05 17:10:25 -07:00
Stella Lau
08d33fe1c9 Fix parameter handling in copyCCtx with cdict 2017-09-05 15:50:20 -07:00
Stella Lau
fd0071da29 Fix parameter handling with ZSTD_copyCCtx 2017-09-05 15:34:17 -07:00
Stella Lau
67d4a6161c Add ldmBucketSizeLog param 2017-09-02 21:55:29 -07:00
Stella Lau
a1f04d518d Move hashEveryLog to cctxParams and update cli 2017-09-01 15:05:47 -07:00
Stella Lau
767a0b3be1 Move ldm hashLog, bucketLog, and mml to cctxParams 2017-09-01 12:24:59 -07:00
Stella Lau
17d8e0bdcc Merge remote-tracking branch 'upstream/longRangeMatcher' into ldm-integrate 2017-09-01 10:19:38 -07:00
Stella Lau
8081becadc Add long distance matching as a CCtxParam 2017-09-01 09:18:58 -07:00
Yann Collet
d7ad99b2ab Merge branch 'longRangeMatcher' into dev 2017-08-31 18:08:37 -07:00
Stella Lau
6a546efb8c Add long distance matcher 
Move last literals section to ZSTD_block_internal
 2017-08-31 12:53:19 -07:00
Stella Lau
90a31bfa16 Pass dictMode to ZSTDMT_initCStream; fix nits 
- Return error code in estimate{CCtx,CStream}Size functions
 2017-08-30 16:19:07 -07:00
Stella Lau
ee65701720 Minor fixes; remove formatting only changes 2017-08-29 20:27:35 -07:00
Stella Lau
a6e20e1bd7 Add test for raw content starting with dict header 2017-08-29 18:36:18 -07:00
Stella Lau
82d636b76a Rename applyCCtxParams() 2017-08-29 18:03:06 -07:00
Stella Lau
4e835720bf Delay creation of ZSTDMT_CCtx 2017-08-29 17:58:32 -07:00
Stella Lau
c7a18b7c21 Localize 'dictMode' from cctx to function param 2017-08-29 15:52:24 -07:00
Stella Lau
c88fb9267f Replace 'byReference' with enum 2017-08-29 11:55:02 -07:00
Stella Lau
b5b9275e67 Rename estimateCCtxSize_advanced() and estimateCStreamSize_advanced() 2017-08-29 10:49:29 -07:00
Stella Lau
0e56a84a1e Fix getting cParams from CCtxParams 2017-08-28 19:25:17 -07:00
Stella Lau
024098a47d Fix parameter retrieval from cdict 2017-08-25 17:58:28 -07:00
Stella Lau
2adde898c8 Fix typo with ZSTDMT_parameter 2017-08-25 16:13:40 -07:00
Stella Lau
18224608ff Remove ZSTD_setCCtxParameter() 2017-08-25 13:58:41 -07:00
Stella Lau
0744592d38 Add function initializing cctxParams from clevel 2017-08-25 13:36:47 -07:00
Stella Lau
9911153723 Move jobSize and overlapLog in zstdmt to cctxParams 2017-08-25 13:14:51 -07:00
Stella Lau
eb7bbab36a Remove ZSTD_p_refDictContent and dictContentByRef 2017-08-25 11:11:45 -07:00
Stella Lau
15fdeb9e41 Enforce nbThreads<=1 for estimateCCtxSize 2017-08-24 16:28:49 -07:00
Stella Lau
2fbf0285b2 Fix interaction with ZSTD_setCCtxParameter() and cleanup 2017-08-24 11:25:41 -07:00
Stella Lau
bf3108fb50 Ensure zstdmt uses 'job version' of cctx parameters 2017-08-23 17:03:31 -07:00
Stella Lau
1c81f725ff Remove duplicated testing code 2017-08-23 15:47:15 -07:00
Stella Lau
64ce49426b Fix cstream compression level 2017-08-23 12:30:47 -07:00
Stella Lau
5bc2c1e982 Add prototype support for customMem with cctxParams 2017-08-23 12:03:30 -07:00
Yann Collet
e9ce1208a1 Merge pull request #812 from facebook/longRangeFix 
fixed extraordinary scenario where all fields use maximum nbBits
 2017-08-23 11:35:28 -07:00
Stella Lau
6f1a21c7e9 Remove formatting-only changes 2017-08-23 10:24:19 -07:00
Stella Lau
11303778d0 Add function to make cctxParams from ZSTD_parameters 2017-08-22 14:53:13 -07:00
Stella Lau
23fc0e41fa Remove 'opaque' naming from internal functions 2017-08-22 14:24:47 -07:00
Stella Lau
8fd1636776 Remove unused functions 2017-08-22 13:33:58 -07:00
Yann Collet
6b2b6a9bd5 fixed extraordinary scenario where all fields use maximum possible nb of bits simultaneously 
can only happen if windowLog>=27  (level 22 --ultra)
 2017-08-22 12:09:21 -07:00
Stella Lau
e50ed1fa3a Fix undefined behavior when srcSize==1 2017-08-22 11:55:42 -07:00
Stella Lau
5b956f4753 Comment out CCtx_param versions of CDict functions 2017-08-21 14:49:16 -07:00
Stella Lau
fd8a25786e Check parameters are valid in initCCtxParams 2017-08-21 13:23:35 -07:00
Stella Lau
1c0dbe81b1 Add documentation for CCtx_params 2017-08-21 13:18:00 -07:00
Stella Lau
939f954285 Pass ZSTD_CCtx_params as const ptr when possible 2017-08-21 12:57:18 -07:00
Stella Lau
560b34f6d2 Return error code when initializing NULL cctxParams 2017-08-21 11:52:26 -07:00
Stella Lau
25be09c6b4 Set some parameters to zero before initializing cdict 2017-08-21 11:35:46 -07:00
Stella Lau
502031ca10 Use cctxParam version of createCDict internally 2017-08-21 11:00:44 -07:00
Stella Lau
91b30dbe84 Remove test parameter 2017-08-21 10:09:06 -07:00
Stella Lau
f181f33bdf Disable tests and refactor 2017-08-21 01:59:08 -07:00
Stella Lau
023b24e6d4 Add cctx param tests 2017-08-20 22:55:07 -07:00
Stella Lau
6cee6e07e5 Add internal createCDict function 2017-08-18 22:48:31 -07:00
Stella Lau
d775519296 Add cctxParam versions of internal functions 2017-08-18 17:37:58 -07:00
Yann Collet
32fb407c9d updated a bunch of headers 
for the new license
 2017-08-18 16:52:05 -07:00
Stella Lau
63b8c98531 Pass cctx parameters to MTCtx 2017-08-18 16:17:24 -07:00
Stella Lau
399ae013d4 Add function to apply cctx params 2017-08-18 13:01:55 -07:00
Stella Lau
81d89d82a6 Move nbThreads to cctx params 2017-08-18 12:08:57 -07:00
Stella Lau
2300c58a6f Move dictContentByRef to cctx params 2017-08-18 12:03:16 -07:00
Stella Lau
b6cb2ed8cb Move dictMode to cctxParams 2017-08-18 11:43:31 -07:00
Stella Lau
97e27affcb Move compression level to cctx params 2017-08-18 11:20:08 -07:00
Stella Lau
c0221124d5 Add function to set opaque parameters 2017-08-17 19:30:22 -07:00
Stella Lau
4169f49171 Add initialization/allocation functions for opaque params 2017-08-17 18:45:04 -07:00
Stella Lau
ade95b8bed Add opaque interfaces for static initialization 2017-08-17 18:13:08 -07:00
Stella Lau
699f11b4f7 Create opaque parameter structure 2017-08-17 17:33:46 -07:00
Nick Terrell
565e925eb7 [libzstd] Fix FORCE_INLINE macro 2017-08-14 21:12:05 -07:00
Nick Terrell
308047eb5d Fix compression failure on incompressible data 
If the destination buffer is the minimum allowed size in
`ZSTD_compressSequences()` (2^17), then if the block isn't compressible
compression might fail with `dstSize_tooSmall`, when it should instead emit
a raw uncompressed block.

Additionally, `ZSTD_compressLiterals()` implicitly called
`ZSTD_noCompressLiterals()` if Huffman compression failed. Make that
explicit.
 2017-08-07 11:45:24 -07:00
Yann Collet
e1222544be Merge pull request #753 from paulcruz74/adapt-approach-3 
adaptive compression v1
 2017-07-27 10:00:10 -07:00
Paul Cruz
6945b3c43d removed previous version of completion for compression 2017-07-19 11:51:50 -07:00
Yann Collet
77d67fb167 Merge pull request #766 from terrelln/real-block-split 
[libzstd] Pull optimal parser state out of seqStore_t
 2017-07-18 08:26:24 -07:00
Yann Collet
14c83b05c7 Merge pull request #765 from terrelln/real-block-split 
[libzstd] Remove ZSTD_CCtx* argument of ZSTD_compressSequences()
 2017-07-17 19:25:55 -07:00
Nick Terrell
7a28b9e4a3 [libzstd] Pull optimal parser state out of seqStore_t 2017-07-17 15:29:11 -07:00
Yann Collet
3381bf4b84 Merge pull request #764 from terrelln/real-block-split 
[libzstd] Refactor ZSTD_compressSequences()
 2017-07-17 14:46:01 -07:00
Nick Terrell
e198230645 [libzstd] Remove ZSTD_CCtx* argument of ZSTD_compressSequences() 2017-07-17 12:27:24 -07:00
Nick Terrell
634f012420 [libzstd] Refactor ZSTD_compressSequences() 2017-07-17 11:36:11 -07:00
Paul Cruz
50ce4eaeb6 added error detection for pthread initialization, added compression completion measurement, fixed const values 2017-07-17 10:12:44 -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
830ef4152a [libzstd] Increase granularity of FSECTable repeat mode 2017-07-13 12:45:39 -07:00
Yann Collet
d985319337 Merge pull request #759 from terrelln/real-block-split 
[libzstd] Pull CTables into sub-structure
 2017-07-13 10:24:19 -07:00
Nick Terrell
de0414b736 [libzstd] Pull CTables into sub-structure 2017-07-12 19:49:19 -07:00
Yann Collet
88da8f1816 fix : propagate custom allocator to ZSTDMT though ZSTD_CCtx_setParameter() 
also : compile fuzzer with MT enabled
 2017-07-10 14:02:33 -07:00
Yann Collet
2cb9774f5e more precise estimation of amount to flush at end of stream (single thread mode) 
also : can use DEBUGLEVEL variable in /tests
 2017-07-04 12:39:26 -07:00
Yann Collet
2084b041f4 fixed comments 2017-07-03 15:52:19 -07:00
Yann Collet
5a77361595 fixed wrong function name in comment 2017-07-03 15:21:24 -07:00
Yann Collet
d5c046c609 implemented shortcut for zstd_compress_generic() in MT mode 
added ZSTDMT_compress_advanced() API
 2017-06-30 14:51:01 -07:00
Yann Collet
a3d9926c40 compression optimization opportunity 
switch to single-pass mode directly into output buffer
when outputSize >= ZSTD_compressBound(inputSize).
Speed gains observed with fullbench (~+15% on level 1)
 2017-06-29 14:44:49 -07:00
Yann Collet
037466245f refactor ZSTD_check_compressionLevel_monotonicIncrease_memoryBudget() 
use less macro statements
the initial version was meant to work with STATIC_ASSERT
but since it doesn't work and needs assert()
it's possible to rewrite it using normally compiled code
which is better for compiler.

Downside : the error message is less precise.
There is a DEBUGLOG(3,) to compensate.
 2017-06-28 20:24:08 -07:00
Yann Collet
2bf428df45 Merge branch 'advancedAPI2' into refPrefix 2017-06-28 16:35:49 -07:00
Yann Collet
1ca76039af fixed -Wdeclaration-after-statement 2017-06-28 15:40:21 -07:00
Yann Collet
813535105b added function to control monotonic memory budget increase of ZSTD_defaultCParameters[0] 
It's a runtime test, based on assert(),
played once, on first ZSTD_getCParams() usage,
when ZSTD_DEBUG is enabled.
 2017-06-28 15:34:56 -07:00
Yann Collet
adbe74a8ac adjusted compression levels to guarantee a monotonically increasing memory budget 2017-06-28 13:22:37 -07:00
Yann Collet
33a6639039 fixed ZSTD_refPrefix with Multithread-enabled CCtx 2017-06-28 11:09:43 -07:00
Yann Collet
2e4274262d controlled dictMode 2017-06-27 17:09:12 -07:00
Yann Collet
b7372933b8 implemented ZSTD_refPrefix() 2017-06-27 15:49:12 -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