diff --git a/src/static_libs/lz4/README b/src/static_libs/lz4/README index 0abb85714a..718f773793 100644 --- a/src/static_libs/lz4/README +++ b/src/static_libs/lz4/README @@ -4,4 +4,4 @@ by: yann.collet.73@gmail.com Copyright/licensing info in source files here. -this was from revsion 66. +this was from revision 84. diff --git a/src/static_libs/lz4/lz4.c b/src/static_libs/lz4/lz4.c index eeefa67388..a651748a7a 100644 --- a/src/static_libs/lz4/lz4.c +++ b/src/static_libs/lz4/lz4.c @@ -91,7 +91,7 @@ //************************************** // Compiler Options //************************************** -#if __STDC_VERSION__ >= 199901L // C99 +#if __STDC_VERSION__ >= 199901L // C99 /* "restrict" is a known keyword */ #else # define restrict // Disable restrict @@ -100,7 +100,6 @@ #define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) #ifdef _MSC_VER // Visual Studio -# define inline __forceinline // Visual is not C99, but supports some kind of inline # include // For Visual 2005 # if LZ4_ARCH64 // 64-bit # pragma intrinsic(_BitScanForward64) // For Visual 2005 @@ -190,8 +189,8 @@ typedef struct _U64_S { U64 v; } U64_S; #define MAXD_LOG 16 #define MAX_DISTANCE ((1 << MAXD_LOG) - 1) -#define ML_BITS 4 -#define ML_MASK ((1U<= 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; + 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) @@ -275,8 +274,8 @@ static inline int LZ4_NbCommonBytes (register U64 val) #elif defined(__GNUC__) && (GCC_VERSION >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT) return (__builtin_ctzll(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 & -val) * 0x0218A392CDABBD3F)) >> 58]; + 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 & -val) * 0x0218A392CDABBD3F)) >> 58]; #endif #endif } @@ -293,10 +292,10 @@ static inline int LZ4_NbCommonBytes (register U32 val) #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; + int r; + if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; } + r += (!val); + return r; #endif #else #if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT) @@ -306,8 +305,8 @@ static inline int LZ4_NbCommonBytes (register U32 val) #elif defined(__GNUC__) && (GCC_VERSION >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT) return (__builtin_ctz(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]; + 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 } @@ -327,161 +326,161 @@ static inline int LZ4_NbCommonBytes (register U32 val) // return : the number of bytes written in buffer 'dest', or 0 if the compression fails static inline int LZ4_compressCtx(void** ctx, - const char* source, - char* dest, - int isize, - int maxOutputSize) + const char* source, + char* dest, + int isize, + int maxOutputSize) { #if HEAPMODE - struct refTables *srt = (struct refTables *) (*ctx); - HTYPE* HashTable; + struct refTables *srt = (struct refTables *) (*ctx); + HTYPE* HashTable; #else - HTYPE HashTable[HASHTABLESIZE] = {0}; + HTYPE HashTable[HASHTABLESIZE] = {0}; #endif - const BYTE* ip = (BYTE*) source; - INITBASE(base); - const BYTE* anchor = ip; - const BYTE* const iend = ip + isize; - const BYTE* const mflimit = iend - MFLIMIT; + const BYTE* ip = (BYTE*) source; + INITBASE(base); + const BYTE* anchor = ip; + const BYTE* const iend = ip + isize; + const BYTE* const mflimit = iend - MFLIMIT; #define matchlimit (iend - LASTLITERALS) - BYTE* op = (BYTE*) dest; - BYTE* const oend = op + maxOutputSize; + BYTE* op = (BYTE*) dest; + BYTE* const oend = op + maxOutputSize; - int len, length; - const int skipStrength = SKIPSTRENGTH; - U32 forwardH; + int len, length; + const int skipStrength = SKIPSTRENGTH; + U32 forwardH; - // Init - if (isizehashTable); - memset((void*)HashTable, 0, sizeof(srt->hashTable)); + if (*ctx == NULL) + { + srt = (struct refTables *) malloc ( sizeof(struct refTables) ); + *ctx = (void*) srt; + } + HashTable = (HTYPE*)(srt->hashTable); + memset((void*)HashTable, 0, sizeof(srt->hashTable)); #else - (void) ctx; + (void) ctx; #endif - // First Byte - HashTable[LZ4_HASH_VALUE(ip)] = ip - base; - ip++; forwardH = LZ4_HASH_VALUE(ip); + // First Byte + HashTable[LZ4_HASH_VALUE(ip)] = ip - base; + ip++; forwardH = LZ4_HASH_VALUE(ip); - // Main Loop + // Main Loop for ( ; ; ) - { - int findMatchAttempts = (1U << skipStrength) + 3; - const BYTE* forwardIp = ip; - const BYTE* ref; - BYTE* token; + { + int findMatchAttempts = (1U << skipStrength) + 3; + const BYTE* forwardIp = ip; + const BYTE* ref; + BYTE* token; - // Find a match - do { - U32 h = forwardH; - int step = findMatchAttempts++ >> skipStrength; - ip = forwardIp; - forwardIp = ip + step; + // Find a match + do { + U32 h = forwardH; + int step = findMatchAttempts++ >> skipStrength; + ip = forwardIp; + forwardIp = ip + step; - if unlikely(forwardIp > mflimit) { goto _last_literals; } + if unlikely(forwardIp > mflimit) { goto _last_literals; } - forwardH = LZ4_HASH_VALUE(forwardIp); - ref = base + HashTable[h]; - HashTable[h] = ip - base; + forwardH = LZ4_HASH_VALUE(forwardIp); + ref = base + HashTable[h]; + HashTable[h] = ip - base; - } while ((ref < ip - MAX_DISTANCE) || (A32(ref) != A32(ip))); + } while ((ref < ip - MAX_DISTANCE) || (A32(ref) != A32(ip))); - // Catch up - while ((ip>anchor) && (ref>(BYTE*)source) && unlikely(ip[-1]==ref[-1])) { ip--; ref--; } + // Catch up + while ((ip>anchor) && (ref>(BYTE*)source) && unlikely(ip[-1]==ref[-1])) { ip--; ref--; } - // Encode Literal length - length = (int)(ip - anchor); - token = op++; - if unlikely(op + length + (2 + 1 + LASTLITERALS) + (length>>8) >= oend) return 0; // Check output limit + // Encode Literal length + length = (int)(ip - anchor); + token = op++; + if unlikely(op + length + (2 + 1 + LASTLITERALS) + (length>>8) > oend) return 0; // Check output limit #ifdef _MSC_VER - if (length>=(int)RUN_MASK) - { - int len = length-RUN_MASK; - *token=(RUN_MASK<254) - { - do { *op++ = 255; len -= 255; } while (len>254); - *op++ = (BYTE)len; - memcpy(op, anchor, length); - op += length; - goto _next_match; - } - else - *op++ = (BYTE)len; - } - else *token = (length<=(int)RUN_MASK) + { + int len = length-RUN_MASK; + *token=(RUN_MASK<254) + { + do { *op++ = 255; len -= 255; } while (len>254); + *op++ = (BYTE)len; + memcpy(op, anchor, length); + op += length; + goto _next_match; + } + else + *op++ = (BYTE)len; + } + else *token = (length<=(int)RUN_MASK) { *token=(RUN_MASK< 254 ; len-=255) *op++ = 255; *op++ = (BYTE)len; } - else *token = (length<=(int)RUN_MASK) { *token=(RUN_MASK< 254 ; len-=255) *op++ = 255; *op++ = (BYTE)len; } + else *token = (length<>8) >= oend) return 0; // Check output limit - if (len>=(int)ML_MASK) { *token+=ML_MASK; len-=ML_MASK; for(; len > 509 ; len-=510) { *op++ = 255; *op++ = 255; } if (len > 254) { len-=255; *op++ = 255; } *op++ = (BYTE)len; } - else *token += len; + // Encode MatchLength + len = (int)(ip - anchor); + if unlikely(op + (1 + LASTLITERALS) + (len>>8) > oend) return 0; // Check output limit + if (len>=(int)ML_MASK) { *token+=ML_MASK; len-=ML_MASK; for(; len > 509 ; len-=510) { *op++ = 255; *op++ = 255; } if (len > 254) { len-=255; *op++ = 255; } *op++ = (BYTE)len; } + else *token += len; - // Test end of chunk - if (ip > mflimit) { anchor = ip; break; } + // Test end of chunk + if (ip > mflimit) { anchor = ip; break; } - // Fill table - HashTable[LZ4_HASH_VALUE(ip-2)] = ip - 2 - base; + // Fill table + HashTable[LZ4_HASH_VALUE(ip-2)] = ip - 2 - base; - // Test next position - ref = base + HashTable[LZ4_HASH_VALUE(ip)]; - HashTable[LZ4_HASH_VALUE(ip)] = ip - base; - if ((ref > ip - (MAX_DISTANCE + 1)) && (A32(ref) == A32(ip))) { token = op++; *token=0; goto _next_match; } + // Test next position + ref = base + HashTable[LZ4_HASH_VALUE(ip)]; + HashTable[LZ4_HASH_VALUE(ip)] = ip - base; + if ((ref > ip - (MAX_DISTANCE + 1)) && (A32(ref) == A32(ip))) { token = op++; *token=0; goto _next_match; } - // Prepare next loop - anchor = ip++; - forwardH = LZ4_HASH_VALUE(ip); - } + // Prepare next loop + anchor = ip++; + forwardH = LZ4_HASH_VALUE(ip); + } _last_literals: - // Encode Last Literals - { - int lastRun = (int)(iend - anchor); - if (((char*)op - dest) + lastRun + 1 + ((lastRun-15)/255) >= maxOutputSize) return 0; - if (lastRun>=(int)RUN_MASK) { *op++=(RUN_MASK< 254 ; lastRun-=255) *op++ = 255; *op++ = (BYTE) lastRun; } - else *op++ = (lastRun< (U32)maxOutputSize) return 0; + if (lastRun>=(int)RUN_MASK) { *op++=(RUN_MASK< 254 ; lastRun-=255) *op++ = 255; *op++ = (BYTE) lastRun; } + else *op++ = (lastRun<> ((MINMATCH*8)-HASHLOG64K)) #define LZ4_HASH64K_VALUE(p) LZ4_HASH64K_FUNCTION(A32(p)) static inline int LZ4_compress64kCtx(void** ctx, - const char* source, - char* dest, - int isize, - int maxOutputSize) + const char* source, + char* dest, + int isize, + int maxOutputSize) { #if HEAPMODE - struct refTables *srt = (struct refTables *) (*ctx); - U16* HashTable; + struct refTables *srt = (struct refTables *) (*ctx); + U16* HashTable; #else - U16 HashTable[HASH64KTABLESIZE] = {0}; + U16 HashTable[HASH64KTABLESIZE] = {0}; #endif - const BYTE* ip = (BYTE*) source; - const BYTE* anchor = ip; - const BYTE* const base = ip; - const BYTE* const iend = ip + isize; - const BYTE* const mflimit = iend - MFLIMIT; + const BYTE* ip = (BYTE*) source; + const BYTE* anchor = ip; + const BYTE* const base = ip; + const BYTE* const iend = ip + isize; + const BYTE* const mflimit = iend - MFLIMIT; #define matchlimit (iend - LASTLITERALS) - BYTE* op = (BYTE*) dest; - BYTE* const oend = op + maxOutputSize; + BYTE* op = (BYTE*) dest; + BYTE* const oend = op + maxOutputSize; - int len, length; - const int skipStrength = SKIPSTRENGTH; - U32 forwardH; + int len, length; + const int skipStrength = SKIPSTRENGTH; + U32 forwardH; - // Init - if (isizehashTable); - memset((void*)HashTable, 0, sizeof(srt->hashTable)); + if (*ctx == NULL) + { + srt = (struct refTables *) malloc ( sizeof(struct refTables) ); + *ctx = (void*) srt; + } + HashTable = (U16*)(srt->hashTable); + memset((void*)HashTable, 0, sizeof(srt->hashTable)); #else - (void) ctx; + (void) ctx; #endif - // First Byte - ip++; forwardH = LZ4_HASH64K_VALUE(ip); + // First Byte + ip++; forwardH = LZ4_HASH64K_VALUE(ip); - // Main Loop + // Main Loop for ( ; ; ) - { - int findMatchAttempts = (1U << skipStrength) + 3; - const BYTE* forwardIp = ip; - const BYTE* ref; - BYTE* token; + { + int findMatchAttempts = (1U << skipStrength) + 3; + const BYTE* forwardIp = ip; + const BYTE* ref; + BYTE* token; - // Find a match - do { - U32 h = forwardH; - int step = findMatchAttempts++ >> skipStrength; - ip = forwardIp; - forwardIp = ip + step; + // Find a match + do { + U32 h = forwardH; + int step = findMatchAttempts++ >> skipStrength; + ip = forwardIp; + forwardIp = ip + step; - if (forwardIp > mflimit) { goto _last_literals; } + if (forwardIp > mflimit) { goto _last_literals; } - forwardH = LZ4_HASH64K_VALUE(forwardIp); - ref = base + HashTable[h]; - HashTable[h] = (U16)(ip - base); + forwardH = LZ4_HASH64K_VALUE(forwardIp); + ref = base + HashTable[h]; + HashTable[h] = (U16)(ip - base); - } while (A32(ref) != A32(ip)); + } while (A32(ref) != A32(ip)); - // Catch up - while ((ip>anchor) && (ref>(BYTE*)source) && (ip[-1]==ref[-1])) { ip--; ref--; } + // Catch up + while ((ip>anchor) && (ref>(BYTE*)source) && (ip[-1]==ref[-1])) { ip--; ref--; } - // Encode Literal length - length = (int)(ip - anchor); - token = op++; - if unlikely(op + length + (2 + 1 + LASTLITERALS) + (length>>8) >= oend) return 0; // Check output limit + // Encode Literal length + length = (int)(ip - anchor); + token = op++; + if unlikely(op + length + (2 + 1 + LASTLITERALS) + (length>>8) > oend) return 0; // Check output limit #ifdef _MSC_VER - if (length>=(int)RUN_MASK) - { - int len = length-RUN_MASK; - *token=(RUN_MASK<254) - { - do { *op++ = 255; len -= 255; } while (len>254); - *op++ = (BYTE)len; - memcpy(op, anchor, length); - op += length; - goto _next_match; - } - else - *op++ = (BYTE)len; - } - else *token = (length<=(int)RUN_MASK) + { + int len = length-RUN_MASK; + *token=(RUN_MASK<254) + { + do { *op++ = 255; len -= 255; } while (len>254); + *op++ = (BYTE)len; + memcpy(op, anchor, length); + op += length; + goto _next_match; + } + else + *op++ = (BYTE)len; + } + else *token = (length<=(int)RUN_MASK) { *token=(RUN_MASK< 254 ; len-=255) *op++ = 255; *op++ = (BYTE)len; } - else *token = (length<=(int)RUN_MASK) { *token=(RUN_MASK< 254 ; len-=255) *op++ = 255; *op++ = (BYTE)len; } + else *token = (length<>8) >= oend) return 0; // Check output limit - if (len>=(int)ML_MASK) { *token+=ML_MASK; len-=ML_MASK; for(; len > 509 ; len-=510) { *op++ = 255; *op++ = 255; } if (len > 254) { len-=255; *op++ = 255; } *op++ = (BYTE)len; } - else *token += len; + // Encode MatchLength + len = (int)(ip - anchor); + if unlikely(op + (1 + LASTLITERALS) + (len>>8) > oend) return 0; // Check output limit + if (len>=(int)ML_MASK) { *token+=ML_MASK; len-=ML_MASK; for(; len > 509 ; len-=510) { *op++ = 255; *op++ = 255; } if (len > 254) { len-=255; *op++ = 255; } *op++ = (BYTE)len; } + else *token += len; - // Test end of chunk - if (ip > mflimit) { anchor = ip; break; } + // Test end of chunk + if (ip > mflimit) { anchor = ip; break; } - // Fill table - HashTable[LZ4_HASH64K_VALUE(ip-2)] = (U16)(ip - 2 - base); + // Fill table + HashTable[LZ4_HASH64K_VALUE(ip-2)] = (U16)(ip - 2 - base); - // Test next position - ref = base + HashTable[LZ4_HASH64K_VALUE(ip)]; - HashTable[LZ4_HASH64K_VALUE(ip)] = (U16)(ip - base); - if (A32(ref) == A32(ip)) { token = op++; *token=0; goto _next_match; } + // Test next position + ref = base + HashTable[LZ4_HASH64K_VALUE(ip)]; + HashTable[LZ4_HASH64K_VALUE(ip)] = (U16)(ip - base); + if (A32(ref) == A32(ip)) { token = op++; *token=0; goto _next_match; } - // Prepare next loop - anchor = ip++; - forwardH = LZ4_HASH64K_VALUE(ip); - } + // Prepare next loop + anchor = ip++; + forwardH = LZ4_HASH64K_VALUE(ip); + } _last_literals: - // Encode Last Literals - { - int lastRun = (int)(iend - anchor); - if (((char*)op - dest) + lastRun + 1 + ((lastRun)>>8) >= maxOutputSize) return 0; - if (lastRun>=(int)RUN_MASK) { *op++=(RUN_MASK< 254 ; lastRun-=255) *op++ = 255; *op++ = (BYTE) lastRun; } - else *op++ = (lastRun< oend) return 0; + if (lastRun>=(int)RUN_MASK) { *op++=(RUN_MASK< 254 ; lastRun-=255) *op++ = 255; *op++ = (BYTE) lastRun; } + else *op++ = (lastRun<>ML_BITS)) == RUN_MASK) { for (;(len=*ip++)==255;length+=255){} length += len; } + // Main Loop + while (1) + { + // get runlength + token = *ip++; + if ((length=(token>>ML_BITS)) == RUN_MASK) { for (;(len=*ip++)==255;length+=255){} length += len; } - // copy literals - cpy = op+length; - if unlikely(cpy>oend-COPYLENGTH) - { - if (cpy > oend) goto _output_error; // Error : request to write beyond destination buffer - memcpy(op, ip, length); - ip += length; - break; // Necessarily EOF - } - LZ4_WILDCOPY(ip, op, cpy); ip -= (op-cpy); op = cpy; + // copy literals + cpy = op+length; + if unlikely(cpy>oend-COPYLENGTH) + { + if (cpy != oend) goto _output_error; // Error : we must necessarily stand at EOF + memcpy(op, ip, length); + ip += length; + break; // EOF + } + LZ4_WILDCOPY(ip, op, cpy); ip -= (op-cpy); op = cpy; - // get offset - LZ4_READ_LITTLEENDIAN_16(ref,cpy,ip); ip+=2; - if (ref < (BYTE* const)dest) goto _output_error; // Error : offset create reference outside destination buffer + // get offset + LZ4_READ_LITTLEENDIAN_16(ref,cpy,ip); ip+=2; + if (ref < (BYTE* const)dest) goto _output_error; // Error : offset create reference outside destination buffer - // get matchlength - if ((length=(token&ML_MASK)) == ML_MASK) { for (;*ip==255;length+=255) {ip++;} length += *ip++; } + // get matchlength + if ((length=(token&ML_MASK)) == ML_MASK) { for (;*ip==255;length+=255) {ip++;} length += *ip++; } - // copy repeated sequence - if unlikely(op-refoend-COPYLENGTH) - { - if (cpy > oend) goto _output_error; // Error : request to write beyond destination buffer - LZ4_SECURECOPY(ref, op, (oend-COPYLENGTH)); - while(opoend-COPYLENGTH) + { + if (cpy > oend) goto _output_error; // Error : request to write beyond destination buffer + LZ4_SECURECOPY(ref, op, (oend-COPYLENGTH)); + while(op>ML_BITS)) == RUN_MASK) { int s=255; while ((ip>ML_BITS)) == RUN_MASK) { int s=255; while ((ipoend-COPYLENGTH) || (ip+length>iend-COPYLENGTH)) - { - if (cpy > oend) goto _output_error; // Error : request to write beyond destination buffer - if (ip+length > iend) goto _output_error; // Error : request to read beyond source buffer - memcpy(op, ip, length); - op += length; - ip += length; - if (ipoend-COPYLENGTH) || (ip+length>iend-COPYLENGTH)) + { + if (cpy > oend) goto _output_error; // Error : writes beyond output buffer + if (ip+length != iend) goto _output_error; // Error : LZ4 format requires to consume all input at this stage + memcpy(op, ip, length); + op += length; + ip = iend; + break; // Necessarily EOF, due to parsing restrictions + } + LZ4_WILDCOPY(ip, op, cpy); ip -= (op-cpy); op = cpy; - // get offset - LZ4_READ_LITTLEENDIAN_16(ref,cpy,ip); ip+=2; - if (ref < (BYTE* const)dest) goto _output_error; // Error : offset creates reference outside of destination buffer + // get offset + LZ4_READ_LITTLEENDIAN_16(ref,cpy,ip); ip+=2; + if (ref < (BYTE* const)dest) goto _output_error; // Error : offset creates reference outside of destination buffer - // get matchlength - if ((length=(token&ML_MASK)) == ML_MASK) { while (ipoend-COPYLENGTH) - { - if (cpy > oend) goto _output_error; // Error : request to write outside of destination buffer - LZ4_SECURECOPY(ref, op, (oend-COPYLENGTH)); - while(opoend-COPYLENGTH) + { + if (cpy > oend) goto _output_error; // Error : request to write outside of destination buffer + LZ4_SECURECOPY(ref, op, (oend-COPYLENGTH)); + while(op (ip-MAX_DISTANCE)) && (nbAttempts)) + while ((ref >= (ip-MAX_DISTANCE)) && (nbAttempts)) { nbAttempts--; if (*(ref+ml) == *(ip+ml)) @@ -380,7 +380,7 @@ inline static int LZ4HC_InsertAndGetWiderMatch (LZ4HC_Data_Structure* hc4, const LZ4HC_Insert(hc4, ip); ref = HASH_POINTER(ip); - while ((ref > ip-MAX_DISTANCE) && (ref >= hc4->base) && (nbAttempts)) + while ((ref >= ip-MAX_DISTANCE) && (ref >= hc4->base) && (nbAttempts)) { nbAttempts--; if (*(startLimit + longest) == *(ref - delta + longest))