ddidderr/zstd-rs
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added : ZSTD_maxCLevel()

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added : 256KB blocks mode
This commit is contained in:
Yann Collet
2015-12-09 09:05:22 +01:00
parent 9ad743e74d
commit d608088ca3
2 changed files with 30 additions and 4 deletions
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lib/zstd_compress.c
+4 -3
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@@ -65,6 +65,7 @@
/* *************************************
* Constants
***************************************/
unsigned ZSTD_maxCLevel(void) { return ZSTD_MAX_CLEVEL; }
static const U32 g_searchStrength = 8;
@@ -599,7 +600,7 @@ static unsigned ZSTD_NbCommonBytes (register size_t val)
# if defined(_MSC_VER) && defined(_WIN64)
unsigned long r = 0;
_BitScanForward64( &r, (U64)val );
return (int)(r>>3);
return (unsigned)(r>>3);
# elif defined(__GNUC__) && (__GNUC__ >= 3)
return (__builtin_ctzll((U64)val) >> 3);
# else
@@ -612,7 +613,7 @@ static unsigned ZSTD_NbCommonBytes (register size_t val)
# if defined(_MSC_VER)
unsigned long r=0;
_BitScanForward( &r, (U32)val );
return (int)(r>>3);
return (unsigned)(r>>3);
# elif defined(__GNUC__) && (__GNUC__ >= 3)
return (__builtin_ctz((U32)val) >> 3);
# else
@@ -2097,7 +2098,7 @@ size_t ZSTD_compressBegin_advanced(ZSTD_CCtx* ctx,
ZSTD_parameters ZSTD_getParams(int compressionLevel, U64 srcSizeHint)
{
ZSTD_parameters result;
int tableID = ((srcSizeHint-1) <= 128 KB) + ((srcSizeHint-1) <= 16 KB); /* intentional underflow for srcSizeHint == 0 */
int tableID = ((srcSizeHint-1) <= 256 KB) + ((srcSizeHint-1) <= 128 KB) + ((srcSizeHint-1) <= 16 KB); /* intentional underflow for srcSizeHint == 0 */
if (compressionLevel<=0) compressionLevel = 1;
if (compressionLevel > ZSTD_MAX_CLEVEL) compressionLevel = ZSTD_MAX_CLEVEL;
result = ZSTD_defaultParameters[tableID][compressionLevel];