diff options
Diffstat (limited to 'lib/lz4hc.c')
| -rw-r--r-- | lib/lz4hc.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/lz4hc.c b/lib/lz4hc.c index b17760d..22eb071 100644 --- a/lib/lz4hc.c +++ b/lib/lz4hc.c @@ -69,6 +69,8 @@ /*=== Macros ===*/ +#define MIN(a,b) ( (a) < (b) ? (a) : (b) ) +#define MAX(a,b) ( (a) > (b) ? (a) : (b) ) #define HASH_FUNCTION(i) (((i) * 2654435761U) >> ((MINMATCH*8)-LZ4HC_HASH_LOG)) #define DELTANEXTMAXD(p) chainTable[(p) & LZ4HC_MAXD_MASK] /* flexible, LZ4HC_MAXD dependent */ #define DELTANEXTU16(table, pos) table[(U16)(pos)] /* faster */ @@ -627,6 +629,16 @@ void LZ4_resetStreamHC (LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel) LZ4_streamHCPtr->internal_donotuse.searchNum = LZ4HC_getSearchNum(compressionLevel); } +void LZ4_setCompressionLevel(LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel) +{ + int const currentCLevel = LZ4_streamHCPtr->internal_donotuse.compressionLevel; + int const minCLevel = currentCLevel < LZ4HC_CLEVEL_OPT_MIN ? 1 : LZ4HC_CLEVEL_OPT_MIN; + int const maxCLevel = currentCLevel < LZ4HC_CLEVEL_OPT_MIN ? LZ4HC_CLEVEL_OPT_MIN-1 : LZ4HC_CLEVEL_MAX; + compressionLevel = MIN(compressionLevel, minCLevel); + compressionLevel = MAX(compressionLevel, maxCLevel); + LZ4_streamHCPtr->internal_donotuse.compressionLevel = compressionLevel; +} + int LZ4_loadDictHC (LZ4_streamHC_t* LZ4_streamHCPtr, const char* dictionary, int dictSize) { LZ4HC_CCtx_internal* const ctxPtr = &LZ4_streamHCPtr->internal_donotuse; |