AuroraMiddleware/lz4
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Author SHA1 Message Date
Max Risuhin
9be9573533 EnableWholeProgramOptimization and UseStaticCRT msbuild custom properties 2017-12-11 14:57:19 +02:00
Yann Collet
6bbe45e1b8 remove register keyword 
deprecated in newer C++ versions,
and dubious utility
 2017-12-04 17:10:23 -08:00
Yann Collet
de49c5bed9
Merge pull request #426 from aliceatlas/cli_chmod_fix 
Fix cli sometimes calling UTIL_setFileStat on /dev/null
 2017-12-04 14:38:00 -08:00
Alice Atlas
42a31aee50 Fix bug which could sometimes result in the lz4 cli chmodding /dev/null if running as root 2017-12-04 16:07:31 -05:00
Yann Collet
6c94c94d46 minor updates to examples 
see 810e2ca27b (commitcomment-25810887)
 2017-11-24 17:18:46 -08:00
Yann Collet
da8bed4b01 API : changed a few variables' names for clarity 
updated relevant doc.
This patch has no impact on ABI/API, nor on binary generation.
 2017-11-20 10:27:05 -08:00
Yann Collet
b48839b41c updated NEWS 2017-11-13 15:54:55 -08:00
Yann Collet
dac26084a9
Merge pull request #416 from lz4/newopt 
Improve Optimal parser
 2017-11-09 14:13:30 -08:00
Yann Collet
dc3ed5b6a7 added code comments 2017-11-08 17:56:20 -08:00
Yann Collet
63f6039fb3 added constant TRAILING_LITERALS 
which is more explicit than its value `3`.
reported by @terrelln
 2017-11-08 17:47:24 -08:00
Yann Collet
f93b595718 lz4opt: simplified match finder invocation to LZ4HC_FindLongerMatch() 2017-11-08 17:11:51 -08:00
Yann Collet
fa03a9d3d9 added code comments 2017-11-08 08:42:59 -08:00
Yann Collet
b07d36245a fixed LZ4HC_reverseCountPattern() 
for multi-bytes patterns
(which is not useful for the time being)
 2017-11-07 17:58:59 -08:00
Yann Collet
897f5e9834 removed the ip++ at the beginning of block 
The first byte used to be skipped
to avoid a infinite self-comparison.
This is no longer necessary, since init() ensures that index starts at 64K.

The first byte is also useless to search when each block is independent,
but it's no longer the case when blocks are linked.

Removing the first-byte-skip saves
about 10 bytes / MB on files compressed with -BD4 (linked blocks 64Kb),
which feels correct as each MB has 16 blocks of 64KB.
 2017-11-07 17:37:31 -08:00
Yann Collet
e6365b1854
Merge pull request #418 from lz4/fasterCount 
faster LZ4_count()
 2017-11-07 12:09:32 -08:00
Yann Collet
71fd08c17d removed legacy version of LZ4HC_InsertAndFindBestMatch() 2017-11-07 11:33:40 -08:00
Yann Collet
c49f66f2ad ensure pattern is a 1-byte repetition 2017-11-07 11:29:28 -08:00
Yann Collet
5512a5f1a9 removed useless (1 && ...) condition 
as reported by @terrelln
 2017-11-07 11:22:57 -08:00
Yann Collet
7130bfe573 improved LZ4HC_reverseCountPattern() : 
works for any repetitive pattern of length 1, 2 or 4 (but not 3!)
works for any endianess
 2017-11-07 11:05:48 -08:00
Yann Collet
a004c1fbee fixed LZ4HC_countPattern() 
- works with byte values other than `0`
- works for any repetitive pattern of length 1, 2 or 4 (but not 3!)
- works for little and big endian systems
- preserve speed of previous implementation
 2017-11-07 10:53:29 -08:00
Yann Collet
9221419c6f added LZ4_FORCEINLINE to counter gcc regression 
as recommended by @terrelln
 2017-11-06 17:29:27 -08:00
Yann Collet
d51f046628 2-stages LZ4_count 
separate first branch from the rest of the compare loop
to get dedicated prediction.

measured a 3-4% compression speed improvement.
 2017-11-06 15:42:50 -08:00
Yann Collet
ce8393e8d7 build: minor : make lz4 doesn't compile liblz4 anymore 
since it's not needed.
 2017-11-06 15:20:08 -08:00
Yann Collet
263e398a52
Merge pull request #417 from sylvestre/dev 
When building with a C++ compiler, remove the 'register' keyword to silent a warning
 2017-11-06 13:56:44 -08:00
Sylvestre Ledru
4fed595dac Only ignore with C++17 2017-11-06 16:16:02 +01:00
Sylvestre Ledru
cca7618f09 When building with a C++ compiler, remove the 'register' keyword to silent a warning 
For example, with clang:

lz4.c:XXX:36: error: 'register' storage class specifier is deprecated and incompatible with C++17 [-Werror,-Wdeprecated-register]
static unsigned LZ4_NbCommonBytes (register reg_t val)
                                   ^~~~~~~~~
 2017-11-05 11:48:03 +01:00
Yann Collet
aa99163752 fixed minor static analyzer warning 
dead assignment
 2017-11-03 12:33:55 -07:00
Yann Collet
89821ac7a1 minor comment edit 2017-11-03 11:49:56 -07:00
Yann Collet
1025546347 unified HC levels 
LZ4_setCompressionLevel() can be users accross the whole range of HC levels
No more transition issue between Optimal and HC modes
 2017-11-03 11:28:28 -07:00
Yann Collet
a1f4a0d983 moved ctx->end handling from parsers 
responsibility better handled one layer above (LZ4HC_compress_generic())
 2017-11-03 10:48:55 -07:00
Yann Collet
c9bbad53ff removed ctx->searchNum 
nbSearches now transmitted directly as function parameter
easier to track and debug
 2017-11-03 10:30:52 -07:00
Yann Collet
e2eca62046 LZ4_compress_HC_continue_destSize() now compatible with optimal parser 
levels 11+
 2017-11-03 02:03:19 -07:00
Yann Collet
3b222d2d96 removes matches[] table 
saves stack space
clearer match finder interface (no more table to fill)
 2017-11-03 01:37:43 -07:00
Yann Collet
320e1d51ac removed useless parameter from hash chain matchfinder 
used to be present for compatibility with binary tree matchfinder
 2017-11-03 01:20:30 -07:00
Yann Collet
81667a1e96 removed code and reference to binary tree match finder 
reduced size of LZ4HC state
 2017-11-03 01:18:12 -07:00
Yann Collet
82c1aed419 improved level 11 speed 2017-11-03 00:59:05 -07:00
Yann Collet
890c0553d0 optimized skip strategy for level 12 2017-11-03 00:15:52 -07:00
Yann Collet
05d78eb817 new level 11 uses 512 attempts 2017-11-02 19:50:08 -07:00
Yann Collet
a1c5343d89 more generic skip formula 
improving speed
 2017-11-02 18:54:18 -07:00
Yann Collet
e06cb03c11 small adaptations for intermediate level 11 2017-11-02 16:25:10 -07:00
Yann Collet
4b81885800 partial search, while preserving compression ratio 
tag interesting places
 2017-11-02 15:37:18 -07:00
Yann Collet
bd992f12e4 searching match leading strictly farther does not work 
sometimes, it's better to re-use same match but start it later,
in order to get shorter matchlength code
 2017-11-02 15:05:45 -07:00
Yann Collet
8e16eb0cd1 fixed last lost bytes in maximal mode 
even gained 2 bytes on calgary.tar...
added conditional traces `g_debuglog_enable`
 2017-11-02 14:53:06 -07:00
Yann Collet
0ff4df1b94 changed strategy : opt[] path is complete after each match 
previous strategy would leave a few "bad choices"
on the ground they would be fixed later,
but that requires passing through each position to make the fix
and cannot give the end position of the last useful match.
 2017-11-02 13:44:57 -07:00
Yann Collet
cc4a109b0d
Merge pull request #415 from lz4/fasterDecodingXp 
Faster decoding xp
 2017-11-01 09:58:49 -07:00
Yann Collet
15b0d229c1 Merge branch 'dev' into btopt 2017-10-31 17:55:01 -07:00
Yann Collet
a5731d6b26 minor change, to help store forwarding 
in a marginal case (offset==4)
 2017-10-31 15:51:56 -07:00
Yann Collet
9378f76e41 extended shortcut match length to 18 2017-10-31 14:20:25 -07:00
Yann Collet
07c91d9dba
Merge pull request #408 from terrelln/time 
[bench] Use higher resolution timer on POSIX
 2017-10-31 13:49:29 -07:00
Yann Collet
ace334a4c9 minor : coding style : use ML_MASK constant 2017-10-31 12:22:15 -07:00