diff options
| -rw-r--r-- | NEWS | 1 | ||||
| -rw-r--r-- | lib/lz4.c | 29 |
2 files changed, 13 insertions, 17 deletions
@@ -2,6 +2,7 @@ v1.7.2 Changed : moved to versioning; package, cli and library have same version number Improved: Small decompression speed boost Improved: Small compression speed improvement on 64-bits systems +Improved: Small compression ratio and speed improvement on small files Improved: Significant speed boost on ARMv6 and ARMv7 New : cli : --rm command New : cli : file attributes are preserved, by Przemyslaw Skibinki @@ -412,7 +412,7 @@ int LZ4_sizeofState() { return LZ4_STREAMSIZE; } /*-****************************** * Compression functions ********************************/ -static U32 LZ4_hashSequence(U32 sequence, tableType_t const tableType) +static U32 LZ4_hash4(U32 sequence, tableType_t const tableType) { if (tableType == byU16) return ((sequence * 2654435761U) >> ((MINMATCH*8)-(LZ4_HASHLOG+1))); @@ -420,7 +420,7 @@ static U32 LZ4_hashSequence(U32 sequence, tableType_t const tableType) return ((sequence * 2654435761U) >> ((MINMATCH*8)-LZ4_HASHLOG)); } -static U32 LZ4_hashSequence64(U64 sequence, tableType_t const tableType) +static U32 LZ4_hash5(U64 sequence, tableType_t const tableType) { static const U64 prime5bytes = 889523592379ULL; static const U64 prime8bytes = 11400714785074694791ULL; @@ -431,15 +431,10 @@ static U32 LZ4_hashSequence64(U64 sequence, tableType_t const tableType) return (U32)(((sequence >> 24) * prime8bytes) >> (64 - hashLog)); } -static U32 LZ4_hashSequenceT(size_t sequence, tableType_t const tableType) +FORCE_INLINE U32 LZ4_hashPosition(const void* p, tableType_t const tableType) { - if (LZ4_64bits()) return LZ4_hashSequence64(sequence, tableType); - return LZ4_hashSequence((U32)sequence, tableType); -} - -static U32 LZ4_hashPosition(const void* p, tableType_t tableType) -{ - return LZ4_hashSequenceT(LZ4_read_ARCH(p), tableType); + if ((LZ4_64bits()) && (tableType == byU32)) return LZ4_hash5(LZ4_read_ARCH(p), tableType); + return LZ4_hash4(LZ4_read32(p), tableType); } static void LZ4_putPositionOnHash(const BYTE* p, U32 h, void* tableBase, tableType_t const tableType, const BYTE* srcBase) @@ -452,7 +447,7 @@ static void LZ4_putPositionOnHash(const BYTE* p, U32 h, void* tableBase, tableTy } } -static void LZ4_putPosition(const BYTE* p, void* tableBase, tableType_t tableType, const BYTE* srcBase) +FORCE_INLINE void LZ4_putPosition(const BYTE* p, void* tableBase, tableType_t tableType, const BYTE* srcBase) { U32 const h = LZ4_hashPosition(p, tableType); LZ4_putPositionOnHash(p, h, tableBase, tableType, srcBase); @@ -465,7 +460,7 @@ static const BYTE* LZ4_getPositionOnHash(U32 h, void* tableBase, tableType_t tab { const U16* const hashTable = (U16*) tableBase; return hashTable[h] + srcBase; } /* default, to ensure a return */ } -static const BYTE* LZ4_getPosition(const BYTE* p, void* tableBase, tableType_t tableType, const BYTE* srcBase) +FORCE_INLINE const BYTE* LZ4_getPosition(const BYTE* p, void* tableBase, tableType_t tableType, const BYTE* srcBase) { U32 const h = LZ4_hashPosition(p, tableType); return LZ4_getPositionOnHash(h, tableBase, tableType, srcBase); @@ -655,7 +650,7 @@ _next_match: _last_literals: /* Encode Last Literals */ - { const size_t lastRun = (size_t)(iend - anchor); + { size_t const lastRun = (size_t)(iend - anchor); if ( (outputLimited) && /* Check output buffer overflow */ ((op - (BYTE*)dest) + lastRun + 1 + ((lastRun+255-RUN_MASK)/255) > (U32)maxOutputSize) ) return 0; @@ -683,12 +678,12 @@ int LZ4_compress_fast_extState(void* state, const char* source, char* dest, int if (maxOutputSize >= LZ4_compressBound(inputSize)) { if (inputSize < LZ4_64Klimit) - return LZ4_compress_generic(state, source, dest, inputSize, 0, notLimited, byU16, noDict, noDictIssue, acceleration); + return LZ4_compress_generic(state, source, dest, inputSize, 0, notLimited, byU16, noDict, noDictIssue, acceleration); else - return LZ4_compress_generic(state, source, dest, inputSize, 0, notLimited, LZ4_64bits() ? byU32 : byPtr, noDict, noDictIssue, acceleration); + return LZ4_compress_generic(state, source, dest, inputSize, 0, notLimited, LZ4_64bits() ? byU32 : byPtr, noDict, noDictIssue, acceleration); } else { if (inputSize < LZ4_64Klimit) - return LZ4_compress_generic(state, source, dest, inputSize, maxOutputSize, limitedOutput, byU16, noDict, noDictIssue, acceleration); + return LZ4_compress_generic(state, source, dest, inputSize, maxOutputSize, limitedOutput, byU16, noDict, noDictIssue, acceleration); else return LZ4_compress_generic(state, source, dest, inputSize, maxOutputSize, limitedOutput, LZ4_64bits() ? byU32 : byPtr, noDict, noDictIssue, acceleration); } @@ -704,7 +699,7 @@ int LZ4_compress_fast(const char* source, char* dest, int inputSize, int maxOutp void* const ctxPtr = &ctx; #endif - int result = LZ4_compress_fast_extState(ctxPtr, source, dest, inputSize, maxOutputSize, acceleration); + int const result = LZ4_compress_fast_extState(ctxPtr, source, dest, inputSize, maxOutputSize, acceleration); #if (HEAPMODE) FREEMEM(ctxPtr); |