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| author | Yann Collet <cyan@fb.com> | 2017-04-09 08:41:36 (GMT) |
|---|---|---|
| committer | Yann Collet <cyan@fb.com> | 2017-04-09 08:41:36 (GMT) |
| commit | e2c9b19122a19fa8a46a253e4ce556a5b75fa8b1 (patch) | |
| tree | c713ab373bca1e02a55036432a90fe8782e31197 /lib/lz4frame.c | |
| parent | 7eecd32c079cdf1afda8c00bba83dd3a1fee3f62 (diff) | |
| download | lz4-e2c9b19122a19fa8a46a253e4ce556a5b75fa8b1.zip lz4-e2c9b19122a19fa8a46a253e4ce556a5b75fa8b1.tar.gz lz4-e2c9b19122a19fa8a46a253e4ce556a5b75fa8b1.tar.bz2 | |
lz4frame : Added negative compression levels
Diffstat (limited to 'lib/lz4frame.c')
| -rw-r--r-- | lib/lz4frame.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/lib/lz4frame.c b/lib/lz4frame.c index fc0c7b5..356be8a 100644 --- a/lib/lz4frame.c +++ b/lib/lz4frame.c @@ -517,14 +517,14 @@ static size_t LZ4F_compressBlock(void* dst, const void* src, size_t srcSize, com static int LZ4F_localLZ4_compress_limitedOutput_withState(void* ctx, const char* src, char* dst, int srcSize, int dstCapacity, int level) { - (void) level; - return LZ4_compress_fast_extState(ctx, src, dst, srcSize, dstCapacity, 1); + int const acceleration = (level < -1) ? -level : 1; + return LZ4_compress_fast_extState(ctx, src, dst, srcSize, dstCapacity, acceleration); } static int LZ4F_localLZ4_compress_limitedOutput_continue(void* ctx, const char* src, char* dst, int srcSize, int dstCapacity, int level) { - (void) level; - return LZ4_compress_fast_continue((LZ4_stream_t*)ctx, src, dst, srcSize, dstCapacity, 1); + int const acceleration = (level < -1) ? -level : 1; + return LZ4_compress_fast_continue((LZ4_stream_t*)ctx, src, dst, srcSize, dstCapacity, acceleration); } static int LZ4F_localLZ4_compressHC_limitedOutput_continue(void* ctx, const char* src, char* dst, int srcSize, int dstSize, int level) @@ -619,7 +619,7 @@ size_t LZ4F_compressUpdate(LZ4F_cctx* cctxPtr, void* dstBuffer, size_t dstCapaci if (compressOptionsPtr->stableSrc) { cctxPtr->tmpIn = cctxPtr->tmpBuff; } else { - int realDictSize = LZ4F_localSaveDict(cctxPtr); + int const realDictSize = LZ4F_localSaveDict(cctxPtr); if (realDictSize==0) return err0r(LZ4F_ERROR_GENERIC); cctxPtr->tmpIn = cctxPtr->tmpBuff + realDictSize; } @@ -629,7 +629,7 @@ size_t LZ4F_compressUpdate(LZ4F_cctx* cctxPtr, void* dstBuffer, size_t dstCapaci if ((cctxPtr->tmpIn + blockSize) > (cctxPtr->tmpBuff + cctxPtr->maxBufferSize) /* necessarily LZ4F_blockLinked && lastBlockCompressed==fromTmpBuffer */ && !(cctxPtr->prefs.autoFlush)) { - int realDictSize = LZ4F_localSaveDict(cctxPtr); + int const realDictSize = LZ4F_localSaveDict(cctxPtr); cctxPtr->tmpIn = cctxPtr->tmpBuff + realDictSize; } |