Jennifer Liu
78978d655d
set up sample .ysml
2018-06-20 13:37:49 -07:00
Yann Collet
1466e0b7f2
Merge pull request #543 from nrgiii/aix_32bit_fuzzer
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Aix 32bit fuzzer
2018-06-01 14:40:22 -07:00
Norm Green
628c1fbb3c
Merge branch 'master' of https://github.com/nrgiii/lz4 into aix_32bit_fuzzer
2018-06-01 12:00:41 -07:00
Norm Green
ebe7e35601
Fix AIX 32 bit build problem of fuzzer.c
2018-06-01 11:52:22 -07:00
Yann Collet
ef4f1e3047
Merge pull request #542 from wbx-github/dev
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allow to override uname when cross-compiling
2018-05-29 14:20:48 -07:00
Yann Collet
6a5f8d5100
Merge pull request #541 from felixhandte/hc-extern-c
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Add `extern "C"` Guard Around Experimental HC Declarations
2018-05-22 14:20:45 -07:00
Waldemar Brodkorb
6a7af839b8
allow to override uname when cross-compiling
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When cross-compiling for example from Darwin to Linux it might be
useful to override uname output to force Linux and create Linux
libraries instead of Darwin libraries.
2018-05-22 20:38:28 +02:00
W. Felix Handte
b8211544ef
Also Fix Appveyor Cast Warning
2018-05-22 11:44:15 -04:00
W. Felix Handte
4248a9bfc0
Add extern "C"
Guards Around Experimental HC Declarations
2018-05-21 22:30:10 -04:00
W. Felix Handte
91888f472d
Remove #define-rename of LZ4_decompress_safe_forceExtDict
2018-05-21 22:29:40 -04:00
W. Felix Handte
c746a27e91
Test Linking C-Compiled Library and C++-Compiled Tests
2018-05-21 22:29:20 -04:00
Yann Collet
843dfd239a
Merge pull request #540 from fbrosson/Haiku
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Add Haiku as a validated target.
2018-05-17 10:48:32 -07:00
fbrosson
2149b1a8f6
Add Haiku as a validated target.
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lz4 1.8.2 works fine on Haiku and passes all tests.
2018-05-17 16:52:53 +00:00
Yann Collet
b3692db46d
Merge pull request #531 from lz4/dev
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Preparing v1.8.2
2018-05-07 14:38:45 -07:00
Yann Collet
bf6fd938e5
Merge pull request #537 from lz4/xpHCmf2
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Speed optimization for optimal parser
2018-05-07 13:06:43 -07:00
Yann Collet
ba1c7148a5
renamed variable for clarity
2018-05-07 12:14:26 -07:00
Yann Collet
abb1f70e17
Merge pull request #538 from lz4/frameTestError
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Fix frametest error
2018-05-07 11:33:53 -07:00
Yann Collet
200b2960d5
fixed minor conversion warning
2018-05-06 18:26:14 -07:00
Yann Collet
24b9c485db
small PA optimization
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which measurably improves speed
on levels 9+
2018-05-06 16:53:33 -07:00
Yann Collet
d7b6c726ed
small extDict : fixed side-effect
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don't fix dictionaries of size 0.
setting dictEnd == source triggers prefix mode,
thus removing possibility to use CDict.
2018-05-05 19:59:00 -07:00
Yann Collet
af12733467
fixed frametest error
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The error can be reproduced using following command :
./frametest -v -i100000000 -s1659 -t31096808
It's actually a bug in the stream LZ4 API,
when starting a new stream
and providing a first chunk to complete with size < MINMATCH.
In which case, the chunk becomes a dictionary.
No hash was generated and stored,
but the chunk is accessible as default position 0 points to dictStart,
and position 0 is still within MAX_DISTANCE.
Then, next attempt to read 32-bits from position 0 fails.
The issue would have been mitigated by starting from index 64 KB,
effectively eliminating position 0 as too far away.
The proper fix is to eliminate such "dictionary" as too small.
Which is what this patch does.
2018-05-05 18:24:11 -07:00
Yann Collet
cdb0275b7f
lz4hc: fixed PA / SC parameter order
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also :
reserved PA for levels 9+ (instead of 8+).
In most cases, speed is lower, and compression benefit is not worth.
2018-05-05 14:32:57 -07:00
Yann Collet
a4e918d7a6
lz4hc: SC only enabled for opt parser
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the trade off is not good for regular HC parser :
compression is a little bit better, but speed cost is too large in comparison.
2018-05-05 14:25:37 -07:00
Yann Collet
d097bf93f8
fixed SC.opt integration with regular HC parser
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Only enabled when searching forward.
note : it slighly improves compression ratio,
but measurably decreases speed.
Trade-off to analyse.
2018-05-05 13:46:45 -07:00
Yann Collet
fa89a9e18b
lz4hc: fixed performance issue
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when combining both PA and CS optimizations
2018-05-05 13:31:03 -07:00
Yann Collet
9699ba5ddf
integrated chain swapper into HC match finder
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slower than expected
Pattern analyzer and Chain Swapper
work slower when both activated.
Reasons unclear.
2018-05-04 19:13:33 -07:00
Yann Collet
a39fa9c5fc
Merge pull request #536 from terrelln/make-install
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Fix make install
2018-05-04 16:18:46 -07:00
Nick Terrell
3e7fa1b14d
Attempt to fix travis
2018-05-04 14:33:59 -07:00
Nick Terrell
a7cc0b590a
Fix make install
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* Uninstall didn't remove the pkg-config correctly.
* Fix `mandir`
* Allow overriding either upper- or lower-case location variables, but
always use the lower case variables.
* Add test case that ensures overriding both upper- and lower-case
variables is the same, and that the directory is empty after uninstall.
2018-05-04 13:50:23 -07:00
Yann Collet
434ace7244
implemented search accelerator
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greatly improves speed compared to non-accelerated,
especially for slower files.
On my laptop, -b12 :
```
calgary.tar : 4.3 MB/s => 9.0 MB/s
enwik7 : 10.2 MB/s => 13.3 MB/s
silesia.tar : 4.0 MB/s => 8.7 MB/s
```
Note : this is the simplified version,
without handling dictionaries, external buffer, nor pattern analyzer.
Current `dev` branch on these samples gives :
```
calgary.tar : 4.2 MB/s
enwik7 : 9.7 MB/s
silesia.tar : 3.5 MB/s
```
interestingly, it's slower,
presumably due to handling of dictionaries.
2018-05-03 16:31:41 -07:00
Yann Collet
d358e33faa
Added CDict speed graph to be used for release statement
2018-05-03 16:01:24 -07:00
Yann Collet
e00ba49cde
updated API documentation
2018-05-03 15:40:01 -07:00
Yann Collet
dc42707107
created LZ4HC_FindLongestMatch()
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simplified match finder
only searching forward and within current buffer,
for easier testing of optimizations.
2018-05-03 15:38:32 -07:00
Yann Collet
f3e84ffd41
Merge pull request #529 from felixhandte/lz4f-fast-reset-for-streaming-only
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LZ4F: Only Reset the LZ4_stream_t when Init'ing a Streaming Block
2018-05-03 15:37:51 -07:00
Yann Collet
2b6c4f3d63
Merge pull request #530 from lz4/lz4fRingBuffer
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Random lz4f clarifications
2018-05-03 12:55:04 -07:00
Yann Collet
ffbff1f360
Merge branch 'dev' into lz4fRingBuffer
2018-05-03 11:54:57 -07:00
Yann Collet
95607a749b
Merge pull request #528 from lz4/complexShortcut
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Faster decoding speed
2018-05-03 11:35:50 -07:00
Cyan4973
2e2c9f6ff3
fix comments / indentation
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as requested by @terrelln
2018-05-03 07:56:33 -07:00
W. Felix Handte
5406c2e479
Only Reset the LZ4 Stream when Init'ing a Streaming Block
2018-05-03 00:03:20 -04:00
Yann Collet
1e130d23e3
updated NEWS in preparation for v1.8.2
2018-05-02 16:52:33 -07:00
Yann Collet
79af95a5b3
Merge branch 'lz4fRingBuffer' of github.com:Cyan4973/lz4 into lz4fRingBuffer
2018-05-02 16:43:51 -07:00
Yann Collet
ba168ee5c7
updated benchmark for v1.8.2
2018-05-02 16:43:05 -07:00
Yann Collet
543223851f
updated benchmark for v1.8.2
2018-05-02 16:41:15 -07:00
Yann Collet
c25eb16666
random lz4f clarifications
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the initial intention was to update lz4f ring buffer strategy,
but lz4f doesn't use ring buffer.
Instead, it uses the destination buffer as much as possible,
and merely copies just what's required to preserve history
into its own buffer, at the end.
Pretty efficient.
This patch just clarifies a few comments and add some assert().
It's built on top of #528 .
It also updates doc.
2018-05-02 16:05:42 -07:00
Yann Collet
858d12e3e1
Merge branch 'dev' into lz4fRingBuffer
2018-05-02 14:24:24 -07:00
Yann Collet
85be6b8f6d
increased nbAttempts for lz4 -12
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shaves one more kilobyte from silesia.tar
2018-05-02 14:22:35 -07:00
Yann Collet
999a8488f6
removed test that might be optimized away
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under UB rule "no overflow on int"
2018-05-02 13:57:33 -07:00
Yann Collet
93cf628a08
introduce LZ4_decoderRingBufferSize()
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fuzzer : fix and robustify ring buffer tests
2018-05-02 13:01:04 -07:00
Yann Collet
1a191b3f8d
simplify shortcut
2018-05-02 10:33:12 -07:00
Yann Collet
0114b63b40
Merge branch 'dev' into complexShortcut
2018-05-02 10:08:30 -07:00