diff options
Diffstat (limited to 'lz4.c')
| -rw-r--r-- | lz4.c | 420 |
1 files changed, 222 insertions, 198 deletions
@@ -31,63 +31,37 @@ - LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c */ + /************************************** Tuning parameters **************************************/ /* * HEAPMODE : * Select how default compression functions will allocate memory for their hash table, - * in memory stack (0:default, fastest), or in memory heap (1:requires memory allocation (malloc)). + * in memory stack (0:default, fastest), or in memory heap (1:requires malloc()). */ #define HEAPMODE 0 +/* + * CPU_HAS_EFFICIENT_UNALIGNED_MEMORY_ACCESS : + * You can force the code to use unaligned memory access if you know your CPU can handle it. + */ +/* #define CPU_HAS_EFFICIENT_UNALIGNED_MEMORY_ACCESS 1 */ + /************************************** CPU Feature Detection **************************************/ -/* 32 or 64 bits ? */ -#if (defined(__x86_64__) || defined(_M_X64) || defined(_WIN64) \ - || defined(__64BIT__) || defined(__mips64) \ - || defined(__powerpc64__) || defined(__powerpc64le__) \ - || defined(__ppc64__) || defined(__ppc64le__) \ - || defined(__PPC64__) || defined(__PPC64LE__) \ - || defined(__ia64) || defined(__itanium__) || defined(_M_IA64) \ - || defined(__s390x__) ) /* Detects 64 bits mode */ -# define LZ4_ARCH64 1 -#else -# define LZ4_ARCH64 0 -#endif -#define LZ4_32BITS (sizeof(void*)==4) -#define LZ4_64BITS (sizeof(void*)==8) - /* - * Little Endian or Big Endian ? - * Overwrite the #define below if you know your architecture endianess + * Unaligned memory access detection */ -#include <stdlib.h> /* Apparently required to detect endianess */ -#if defined (__GLIBC__) -# include <endian.h> -# if (__BYTE_ORDER == __BIG_ENDIAN) -# define LZ4_BIG_ENDIAN 1 -# endif -#elif (defined(__BIG_ENDIAN__) || defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN)) && !(defined(__LITTLE_ENDIAN__) || defined(__LITTLE_ENDIAN) || defined(_LITTLE_ENDIAN)) -# define LZ4_BIG_ENDIAN 1 -#elif defined(__sparc) || defined(__sparc__) \ - || defined(__powerpc__) || defined(__ppc__) || defined(__PPC__) \ - || defined(__hpux) || defined(__hppa) \ - || defined(_MIPSEB) || defined(__s390__) -# define LZ4_BIG_ENDIAN 1 +#if defined(CPU_HAS_EFFICIENT_UNALIGNED_MEMORY_ACCESS) \ + || defined(__ARM_FEATURE_UNALIGNED) \ + || defined(__i386__) || defined(__x86_64__) \ + || defined(_M_IX86) || defined(_M_X64) +# define LZ4_UNALIGNED_ACCESS 1 #else -/* Little Endian assumed. PDP Endian and other very rare endian format are unsupported. */ -#endif - -/* - * Unaligned memory access is automatically enabled for "common" CPU, such as x86. - * For others CPU, such as ARM, the compiler may be more cautious, inserting unnecessary extra code to ensure aligned access property - * If you know your target CPU supports unaligned memory access, you want to force this option manually to improve performance - */ -#if defined(__ARM_FEATURE_UNALIGNED) -# define LZ4_FORCE_UNALIGNED_ACCESS 1 +# define LZ4_UNALIGNED_ACCESS 0 #endif /* Define this parameter if your target system or compiler does not support hardware bit count */ @@ -95,18 +69,9 @@ # define LZ4_FORCE_SW_BITCOUNT #endif -/* - * BIG_ENDIAN_NATIVE_BUT_INCOMPATIBLE : - * This option may provide a small boost to performance for some big endian cpu, although probably modest. - * You may set this option to 1 if data will remain within closed environment. - * This option is useless on Little_Endian CPU (such as x86) - */ - -/* #define BIG_ENDIAN_NATIVE_BUT_INCOMPATIBLE 1 */ - /************************************** - Compiler Options + Compiler Options **************************************/ #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */ /* "restrict" is a known keyword */ @@ -117,13 +82,6 @@ #ifdef _MSC_VER /* Visual Studio */ # define FORCE_INLINE static __forceinline # include <intrin.h> /* For Visual 2005 */ -# if LZ4_ARCH64 /* 64-bits */ -# pragma intrinsic(_BitScanForward64) /* For Visual 2005 */ -# pragma intrinsic(_BitScanReverse64) /* For Visual 2005 */ -# else /* 32-bits */ -# pragma intrinsic(_BitScanForward) /* For Visual 2005 */ -# pragma intrinsic(_BitScanReverse) /* For Visual 2005 */ -# endif # pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ #else # ifdef __GNUC__ @@ -133,12 +91,6 @@ # endif #endif -#ifdef _MSC_VER /* Visual Studio */ -# define lz4_bswap16(x) _byteswap_ushort(x) -#else -# define lz4_bswap16(x) ((unsigned short int) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))) -#endif - #define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) #if (GCC_VERSION >= 302) || (__INTEL_COMPILER >= 800) || defined(__clang__) @@ -185,37 +137,167 @@ typedef unsigned long long U64; #endif -#if defined(__GNUC__) && !defined(LZ4_FORCE_UNALIGNED_ACCESS) -# define _PACKED __attribute__ ((packed)) -#else -# define _PACKED -#endif -#if !defined(LZ4_FORCE_UNALIGNED_ACCESS) && !defined(__GNUC__) -# if defined(__IBMC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) -# pragma pack(1) -# else -# pragma pack(push, 1) -# endif -#endif +/************************************** + Reading and writing into memory +**************************************/ +static unsigned LZ4_64bits(void) { return sizeof(void*)==8; } -typedef struct { U16 v; } _PACKED U16_S; -typedef struct { U32 v; } _PACKED U32_S; -typedef struct { U64 v; } _PACKED U64_S; -typedef struct {size_t v;} _PACKED size_t_S; +static unsigned LZ4_isLittleEndian(void) +{ + const union { U32 i; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */ + return one.c[0]; +} -#if !defined(LZ4_FORCE_UNALIGNED_ACCESS) && !defined(__GNUC__) -# if defined(__SUNPRO_C) || defined(__SUNPRO_CC) -# pragma pack(0) -# else -# pragma pack(pop) -# endif -#endif +static U16 LZ4_readLE16(const void* memPtr) +{ + if ((LZ4_UNALIGNED_ACCESS) && (LZ4_isLittleEndian())) + return *(U16*)memPtr; + { + const BYTE* p = memPtr; + return (U16)((U16)p[0] + (p[1]<<8)); + } +} + +static void LZ4_writeLE16(void* memPtr, U16 value) +{ + if ((LZ4_UNALIGNED_ACCESS) && (LZ4_isLittleEndian())) + { + *(U16*)memPtr = value; + return; + } + { + BYTE* p = memPtr; + p[0] = (BYTE) value; + p[1] = (BYTE)(value>>8); + } +} + +static U32 LZ4_readLE32(const void* memPtr) +{ + if ((LZ4_UNALIGNED_ACCESS) && (LZ4_isLittleEndian())) + return *(U32*)memPtr; + { + const BYTE* p = memPtr; + U32 result = (U32)((U32)p[0] + (p[1]<<8) + (p[2]<<16) + ((U32)p[3]<<24)); + return result; + } +} + +/* +static void LZ4_writeLE32(void* memPtr, U32 value) +{ + BYTE* p = memPtr; + p[0] = (BYTE) value; + p[1] = (BYTE)(value>>8); + p[2] = (BYTE)(value>>16); + p[3] = (BYTE)(value>>24); +} +*/ + +static void LZ4_copy4(void* dstPtr, const void* srcPtr) +{ + if (LZ4_UNALIGNED_ACCESS) + { + *(U32*)dstPtr = *(U32*)srcPtr; + return; + } + { + BYTE* d = dstPtr; + const BYTE* s = srcPtr; + d[0] = s[0]; + d[1] = s[1]; + d[2] = s[2]; + d[3] = s[3]; + } +} + +static U64 LZ4_readLE64(const void* memPtr) +{ + if ((LZ4_UNALIGNED_ACCESS) && (LZ4_isLittleEndian())) + return *(U64*)memPtr; + { + const BYTE* p = memPtr; + return (U64)((U64)p[0] + (p[1]<<8) + (p[2]<<16) + ((U64)p[3]<<24) + + (((U64)p[4])<<32) + ((U64)p[5]<<40) + ((U64)p[6]<<48) + ((U64)p[7]<<56)); + } +} + +/* +static void LZ4_writeLE64(void* memPtr, U64 value) +{ + BYTE* p = memPtr; + p[0] = (BYTE) value; + p[1] = (BYTE)(value>>8); + p[2] = (BYTE)(value>>16); + p[3] = (BYTE)(value>>24); + p[4] = (BYTE)(value>>32); + p[5] = (BYTE)(value>>40); + p[6] = (BYTE)(value>>48); + p[7] = (BYTE)(value>>56); +} +*/ + +static void LZ4_copy8(void* dstPtr, const void* srcPtr) +{ + if (LZ4_UNALIGNED_ACCESS) + { + if (LZ4_64bits()) + *(U64*)dstPtr = *(U64*)srcPtr; + else + ((U32*)dstPtr)[0] = ((U32*)srcPtr)[0], + ((U32*)dstPtr)[1] = ((U32*)srcPtr)[1]; + return; + } + { + BYTE* d = dstPtr; + const BYTE* s = srcPtr; + d[0] = s[0]; + d[1] = s[1]; + d[2] = s[2]; + d[3] = s[3]; + d[4] = s[4]; + d[5] = s[5]; + d[6] = s[6]; + d[7] = s[7]; + } +} -#define A16(x) (((U16_S *)(x))->v) -#define A32(x) (((U32_S *)(x))->v) -#define A64(x) (((U64_S *)(x))->v) -#define AARCH(x) (((size_t_S *)(x))->v) +#define STEPSIZE sizeof(size_t) + +static size_t LZ4_readLE_ARCH(const void* p) +{ + if (LZ4_64bits()) + return (size_t)LZ4_readLE64(p); + else + return (size_t)LZ4_readLE32(p); +} + +/* +static void LZ4_writeLE_ARCH(void* p, size_t value) +{ + if (LZ4_64BITS) + LZ4_writeLE64(p, (U64)value); + else + LZ4_writeLE32(p, (U32)value); +} + +static void LZ4_copyARCH(void* dstPtr, const void* srcPtr) +{ + if (LZ4_64BITS) + LZ4_copy8(dstPtr, srcPtr); + else + LZ4_copy4(dstPtr, srcPtr); +} +*/ + +#if !defined(__GNUC__) +# define LZ4_WILDCOPY(d,s,e) { do { LZ4_copy8(d,s); d+=8; s+=8; } while (d<e); } /* at the end, d>=e; */ +#else +# define LZ4_WILDCOPY64(d,s,e) { do { LZ4_copy8(d,s); d+=8; s+=8; } while (d<e); } /* at the end, d>=e; */ +# define LZ4_WILDCOPY32(d,s,e) { if (likely(e-d <= 8)) { LZ4_copy8(d,s); d+=8; s+=8; } else do { LZ4_copy8(d,s); d+=8; s+=8; } while (d<e); } +# define LZ4_WILDCOPY(d,s,e) { if (LZ4_64bits()) LZ4_WILDCOPY64(d,s,e) else LZ4_WILDCOPY32(d,s,e); } +#endif /************************************** @@ -252,12 +334,12 @@ static const int LZ4_minLength = (MFLIMIT+1); Structures and local types **************************************/ typedef struct { - U32 hashTable[HASH_SIZE_U32]; - U32 currentOffset; - U32 initCheck; + U32 hashTable[HASH_SIZE_U32]; + U32 currentOffset; + U32 initCheck; const BYTE* dictionary; const BYTE* bufferStart; - U32 dictSize; + U32 dictSize; } LZ4_stream_t_internal; typedef enum { notLimited = 0, limitedOutput = 1 } limitedOutput_directive; @@ -271,108 +353,49 @@ typedef enum { full = 0, partial = 1 } earlyEnd_directive; /************************************** - Architecture-specific macros -**************************************/ -#define STEPSIZE sizeof(size_t) -#define LZ4_COPYSTEP(d,s) { AARCH(d) = AARCH(s); d+=STEPSIZE; s+=STEPSIZE; } -#define LZ4_COPY8(d,s) { LZ4_COPYSTEP(d,s); if (STEPSIZE<8) LZ4_COPYSTEP(d,s); } - -#if (defined(LZ4_BIG_ENDIAN) && !defined(BIG_ENDIAN_NATIVE_BUT_INCOMPATIBLE)) -# define LZ4_READ_LITTLEENDIAN_16(d,s,p) { U16 v = A16(p); v = lz4_bswap16(v); d = (s) - v; } -# define LZ4_WRITE_LITTLEENDIAN_16(p,i) { U16 v = (U16)(i); v = lz4_bswap16(v); A16(p) = v; p+=2; } -#else /* Little Endian */ -# define LZ4_READ_LITTLEENDIAN_16(d,s,p) { d = (s) - A16(p); } -# define LZ4_WRITE_LITTLEENDIAN_16(p,v) { A16(p) = v; p+=2; } -#endif - - -/************************************** - Macros + Utils **************************************/ #define LZ4_STATIC_ASSERT(c) { enum { LZ4_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */ -#if LZ4_ARCH64 || !defined(__GNUC__) -# define LZ4_WILDCOPY(d,s,e) { do { LZ4_COPY8(d,s) } while (d<e); } /* at the end, d>=e; */ -#else -# define LZ4_WILDCOPY(d,s,e) { if (likely(e-d <= 8)) LZ4_COPY8(d,s) else do { LZ4_COPY8(d,s) } while (d<e); } -#endif +int LZ4_versionNumber (void) { return LZ4_VERSION_NUMBER; } +int LZ4_compressBound(int isize) { return LZ4_COMPRESSBOUND(isize); } -/**************************** - Private local functions -****************************/ -#if LZ4_ARCH64 -static int LZ4_NbCommonBytes (register U64 val) +/******************************** + Compression functions +********************************/ +static int LZ4_NbCommonBytes (register size_t val) { -# if defined(LZ4_BIG_ENDIAN) -# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT) - unsigned long r = 0; - _BitScanReverse64( &r, val ); - return (int)(r>>3); -# elif defined(__GNUC__) && (GCC_VERSION >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT) - return (__builtin_clzll(val) >> 3); -# else - int r; - if (!(val>>32)) { r=4; } else { r=0; val>>=32; } - if (!(val>>16)) { r+=2; val>>=8; } else { val>>=24; } - r += (!val); - return r; -# endif -# else -# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT) + if (LZ4_64bits()) + { +# if defined(_MSC_VER) && defined(_WIN64) && !defined(LZ4_FORCE_SW_BITCOUNT) unsigned long r = 0; - _BitScanForward64( &r, val ); + _BitScanForward64( &r, (U64)val ); return (int)(r>>3); # elif defined(__GNUC__) && (GCC_VERSION >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT) - return (__builtin_ctzll(val) >> 3); + return (__builtin_ctzll((U64)val) >> 3); # else static const int DeBruijnBytePos[64] = { 0, 0, 0, 0, 0, 1, 1, 2, 0, 3, 1, 3, 1, 4, 2, 7, 0, 2, 3, 6, 1, 5, 3, 5, 1, 3, 4, 4, 2, 5, 6, 7, 7, 0, 1, 2, 3, 3, 4, 6, 2, 6, 5, 5, 3, 4, 5, 6, 7, 1, 2, 4, 6, 4, 4, 5, 7, 2, 6, 5, 7, 6, 7, 7 }; return DeBruijnBytePos[((U64)((val & -(long long)val) * 0x0218A392CDABBD3FULL)) >> 58]; # endif -# endif -} - -#else - -static int LZ4_NbCommonBytes (register U32 val) -{ -# if defined(LZ4_BIG_ENDIAN) -# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT) - unsigned long r = 0; - _BitScanReverse( &r, val ); - return (int)(r>>3); -# elif defined(__GNUC__) && (GCC_VERSION >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT) - return (__builtin_clz(val) >> 3); -# else - int r; - if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; } - r += (!val); - return r; -# endif -# else + } + /* 32 bits */ + { # if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT) unsigned long r; - _BitScanForward( &r, val ); + _BitScanForward( &r, (U32)val ); return (int)(r>>3); # elif defined(__GNUC__) && (GCC_VERSION >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT) - return (__builtin_ctz(val) >> 3); + return (__builtin_ctz((U32)val) >> 3); # else static const int DeBruijnBytePos[32] = { 0, 0, 3, 0, 3, 1, 3, 0, 3, 2, 2, 1, 3, 2, 0, 1, 3, 3, 1, 2, 2, 2, 2, 0, 3, 1, 2, 0, 1, 0, 1, 1 }; return DeBruijnBytePos[((U32)((val & -(S32)val) * 0x077CB531U)) >> 27]; # endif -# endif + } } -#endif - - -/******************************** - Compression functions -********************************/ -int LZ4_versionNumber (void) { return LZ4_VERSION_NUMBER; } -int LZ4_compressBound(int isize) { return LZ4_COMPRESSBOUND(isize); } -static int LZ4_hashSequence(U32 sequence, tableType_t tableType) +static U32 LZ4_hashSequence(U32 sequence, tableType_t tableType) { if (tableType == byU16) return (((sequence) * 2654435761U) >> ((MINMATCH*8)-(LZ4_HASHLOG+1))); @@ -380,15 +403,15 @@ static int LZ4_hashSequence(U32 sequence, tableType_t tableType) return (((sequence) * 2654435761U) >> ((MINMATCH*8)-LZ4_HASHLOG)); } -static int LZ4_hashPosition(const BYTE* p, tableType_t tableType) { return LZ4_hashSequence(A32(p), tableType); } +static U32 LZ4_hashPosition(const BYTE* p, tableType_t tableType) { return LZ4_hashSequence(LZ4_readLE32(p), tableType); } static void LZ4_putPositionOnHash(const BYTE* p, U32 h, void* tableBase, tableType_t tableType, const BYTE* srcBase) { switch (tableType) { - case byPtr: { const BYTE** hashTable = (const BYTE**) tableBase; hashTable[h] = p; break; } - case byU32: { U32* hashTable = (U32*) tableBase; hashTable[h] = (U32)(p-srcBase); break; } - case byU16: { U16* hashTable = (U16*) tableBase; hashTable[h] = (U16)(p-srcBase); break; } + case byPtr: { const BYTE** hashTable = (const BYTE**) tableBase; hashTable[h] = p; return; } + case byU32: { U32* hashTable = (U32*) tableBase; hashTable[h] = (U32)(p-srcBase); return; } + case byU16: { U16* hashTable = (U16*) tableBase; hashTable[h] = (U16)(p-srcBase); return; } } } @@ -417,13 +440,13 @@ static unsigned LZ4_count(const BYTE* pIn, const BYTE* pRef, const BYTE* pInLimi while (likely(pIn<pInLimit-(STEPSIZE-1))) { - size_t diff = AARCH(pRef) ^ AARCH(pIn); + size_t diff = LZ4_readLE_ARCH(pRef) ^ LZ4_readLE_ARCH(pIn); if (!diff) { pIn+=STEPSIZE; pRef+=STEPSIZE; continue; } pIn += LZ4_NbCommonBytes(diff); return (unsigned)(pIn - pStart); } - if (LZ4_64BITS) if ((pIn<(pInLimit-3)) && (A32(pRef) == A32(pIn))) { pIn+=4; pRef+=4; } - if ((pIn<(pInLimit-1)) && (A16(pRef) == A16(pIn))) { pIn+=2; pRef+=2; } + if (LZ4_64bits()) if ((pIn<(pInLimit-3)) && (LZ4_readLE32(pRef) == LZ4_readLE32(pIn))) { pIn+=4; pRef+=4; } + if ((pIn<(pInLimit-1)) && (LZ4_readLE16(pRef) == LZ4_readLE16(pIn))) { pIn+=2; pRef+=2; } if ((pIn<pInLimit) && (*pRef == *pIn)) pIn++; return (unsigned)(pIn - pStart); @@ -526,7 +549,7 @@ static int LZ4_compress_generic( } while ( ((dictIssue==dictSmall) ? (ref < lowRefLimit) : 0) || ((tableType==byU16) ? 0 : (ref + MAX_DISTANCE < ip)) - || (A32(ref+refDelta) != A32(ip)) ); + || (LZ4_readLE32(ref+refDelta) != LZ4_readLE32(ip)) ); } /* Catch up */ @@ -553,7 +576,7 @@ static int LZ4_compress_generic( _next_match: /* Encode Offset */ - LZ4_WRITE_LITTLEENDIAN_16(op, (U16)(ip-ref)); + LZ4_writeLE16(op, (U16)(ip-ref)); op+=2; /* Encode MatchLength */ { @@ -619,7 +642,7 @@ _next_match: LZ4_putPosition(ip, ctx, tableType, base); if ( ((dictIssue==dictSmall) ? (ref>=lowRefLimit) : 1) && (ref+MAX_DISTANCE>=ip) - && (A32(ref+refDelta)==A32(ip)) ) + && (LZ4_readLE32(ref+refDelta)==LZ4_readLE32(ip)) ) { token=op++; *token=0; goto _next_match; } /* Prepare next loop */ @@ -646,16 +669,16 @@ _last_literals: int LZ4_compress(const char* source, char* dest, int inputSize) { #if (HEAPMODE) - void* ctx = ALLOCATOR(LZ4_STREAMSIZE_U32, 4); /* Aligned on 4-bytes boundaries */ + void* ctx = ALLOCATOR(LZ4_STREAMSIZE_U64, 8); /* Aligned on 8-bytes boundaries */ #else - U32 ctx[LZ4_STREAMSIZE_U32] = {0}; /* Ensure data is aligned on 4-bytes boundaries */ + U64 ctx[LZ4_STREAMSIZE_U64] = {0}; /* Ensure data is aligned on 8-bytes boundaries */ #endif int result; if (inputSize < (int)LZ4_64KLIMIT) result = LZ4_compress_generic((void*)ctx, source, dest, inputSize, 0, notLimited, byU16, noDict, noDictIssue); else - result = LZ4_compress_generic((void*)ctx, source, dest, inputSize, 0, notLimited, LZ4_64BITS ? byU32 : byPtr, noDict, noDictIssue); + result = LZ4_compress_generic((void*)ctx, source, dest, inputSize, 0, notLimited, LZ4_64bits() ? byU32 : byPtr, noDict, noDictIssue); #if (HEAPMODE) FREEMEM(ctx); @@ -666,16 +689,16 @@ int LZ4_compress(const char* source, char* dest, int inputSize) int LZ4_compress_limitedOutput(const char* source, char* dest, int inputSize, int maxOutputSize) { #if (HEAPMODE) - void* ctx = ALLOCATOR(LZ4_STREAMSIZE_U32, 4); /* Aligned on 4-bytes boundaries */ + void* ctx = ALLOCATOR(LZ4_STREAMSIZE_U64, 4); /* Aligned on 8-bytes boundaries */ #else - U32 ctx[LZ4_STREAMSIZE_U32] = {0}; /* Ensure data is aligned on 4-bytes boundaries */ + U64 ctx[LZ4_STREAMSIZE_U64] = {0}; /* Ensure data is aligned on 8-bytes boundaries */ #endif int result; if (inputSize < (int)LZ4_64KLIMIT) result = LZ4_compress_generic((void*)ctx, source, dest, inputSize, maxOutputSize, limitedOutput, byU16, noDict, noDictIssue); else - result = LZ4_compress_generic((void*)ctx, source, dest, inputSize, maxOutputSize, limitedOutput, LZ4_64BITS ? byU32 : byPtr, noDict, noDictIssue); + result = LZ4_compress_generic((void*)ctx, source, dest, inputSize, maxOutputSize, limitedOutput, LZ4_64bits() ? byU32 : byPtr, noDict, noDictIssue); #if (HEAPMODE) FREEMEM(ctx); @@ -700,7 +723,7 @@ void LZ4_resetStream (LZ4_stream_t* LZ4_stream) LZ4_stream_t* LZ4_createStream(void) { - LZ4_stream_t* lz4s = (LZ4_stream_t*)ALLOCATOR(4, LZ4_STREAMSIZE_U32); + LZ4_stream_t* lz4s = (LZ4_stream_t*)ALLOCATOR(8, LZ4_STREAMSIZE_U64); LZ4_STATIC_ASSERT(LZ4_STREAMSIZE >= sizeof(LZ4_stream_t_internal)); /* A compilation error here means LZ4_STREAMSIZE is not large enough */ LZ4_resetStream(lz4s); return lz4s; @@ -959,11 +982,12 @@ FORCE_INLINE int LZ4_decompress_generic( LZ4_WILDCOPY(op, ip, cpy); ip -= (op-cpy); op = cpy; /* get offset */ - LZ4_READ_LITTLEENDIAN_16(match,cpy,ip); ip+=2; + match = cpy - LZ4_readLE16(ip); ip+=2; if ((checkOffset) && (unlikely(match < lowLimit))) goto _output_error; /* Error : offset outside destination buffer */ /* get matchlength */ - if ((length=(token&ML_MASK)) == ML_MASK) + length = token & ML_MASK; + if (length == ML_MASK) { unsigned s; do @@ -1020,9 +1044,9 @@ FORCE_INLINE int LZ4_decompress_generic( op[2] = match[2]; op[3] = match[3]; match += dec32table[op-match]; - A32(op+4) = A32(match); + LZ4_copy4(op+4, match); op += 8; match -= dec64; - } else { LZ4_COPY8(op,match); } + } else { LZ4_copy8(op, match); op+=8; match+=8; } if (unlikely(cpy>oend-12)) { @@ -1079,7 +1103,7 @@ typedef struct */ LZ4_streamDecode_t* LZ4_createStreamDecode(void) { - LZ4_streamDecode_t* lz4s = (LZ4_streamDecode_t*) ALLOCATOR(sizeof(U32), LZ4_STREAMDECODESIZE_U32); + LZ4_streamDecode_t* lz4s = (LZ4_streamDecode_t*) ALLOCATOR(sizeof(U64), LZ4_STREAMDECODESIZE_U64); return lz4s; } @@ -1241,7 +1265,7 @@ int LZ4_resetStreamState(void* state, const char* inputBuffer) void* LZ4_create (const char* inputBuffer) { - void* lz4ds = ALLOCATOR(4, LZ4_STREAMSIZE_U32); + void* lz4ds = ALLOCATOR(8, LZ4_STREAMSIZE_U64); LZ4_init ((LZ4_stream_t_internal*)lz4ds, (const BYTE*)inputBuffer); return lz4ds; } @@ -1267,7 +1291,7 @@ int LZ4_compress_withState (void* state, const char* source, char* dest, int inp if (inputSize < (int)LZ4_64KLIMIT) return LZ4_compress_generic(state, source, dest, inputSize, 0, notLimited, byU16, noDict, noDictIssue); else - return LZ4_compress_generic(state, source, dest, inputSize, 0, notLimited, LZ4_64BITS ? byU32 : byPtr, noDict, noDictIssue); + return LZ4_compress_generic(state, source, dest, inputSize, 0, notLimited, LZ4_64bits() ? byU32 : byPtr, noDict, noDictIssue); } int LZ4_compress_limitedOutput_withState (void* state, const char* source, char* dest, int inputSize, int maxOutputSize) @@ -1278,7 +1302,7 @@ int LZ4_compress_limitedOutput_withState (void* state, const char* source, char* if (inputSize < (int)LZ4_64KLIMIT) return LZ4_compress_generic(state, source, dest, inputSize, maxOutputSize, limitedOutput, byU16, noDict, noDictIssue); else - return LZ4_compress_generic(state, source, dest, inputSize, maxOutputSize, limitedOutput, LZ4_64BITS ? byU32 : byPtr, noDict, noDictIssue); + return LZ4_compress_generic(state, source, dest, inputSize, maxOutputSize, limitedOutput, LZ4_64bits() ? byU32 : byPtr, noDict, noDictIssue); } /* Obsolete streaming decompression functions */ |