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author | Yann Collet <yann.collet.73@gmail.com> | 2015-03-10 15:57:42 (GMT) |
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committer | Yann Collet <yann.collet.73@gmail.com> | 2015-03-10 15:57:42 (GMT) |
commit | ceec6fa8492a5ff0ed163c96516716a3c2b09461 (patch) | |
tree | 2e478ef1c6960cb419760761e432471f115522c5 /lib/lz4frame.c | |
parent | 6b0c39b839b8343da195252a8c46e6d93138f3b8 (diff) | |
download | lz4-ceec6fa8492a5ff0ed163c96516716a3c2b09461.zip lz4-ceec6fa8492a5ff0ed163c96516716a3c2b09461.tar.gz lz4-ceec6fa8492a5ff0ed163c96516716a3c2b09461.tar.bz2 |
g++ compatibility
Diffstat (limited to 'lib/lz4frame.c')
-rw-r--r-- | lib/lz4frame.c | 92 |
1 files changed, 41 insertions, 51 deletions
diff --git a/lib/lz4frame.c b/lib/lz4frame.c index 5183f22..d81690f 100644 --- a/lib/lz4frame.c +++ b/lib/lz4frame.c @@ -1,6 +1,7 @@ /* LZ4 auto-framing library Copyright (C) 2011-2014, Yann Collet. + BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) Redistribution and use in source and binary forms, with or without @@ -32,8 +33,8 @@ You can contact the author at : */ /* LZ4F is a stand-alone API to create LZ4-compressed Frames -* fully conformant to specification v1.4.1. -* All related operations, including memory management, are handled by the library. +* in full conformance with specification v1.4.1. +* All related operations, including memory management, are handled by the library. * */ @@ -46,13 +47,12 @@ Compiler Options #define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) #ifdef __GNUC__ -# pragma GCC diagnostic ignored "-Wmissing-braces" /* GCC bug 53119 : doesn't accept { 0 } as initializer (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119) */ -# pragma GCC diagnostic ignored "-Wmissing-field-initializers" /* GCC bug 53119 : doesn't accept { 0 } as initializer (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119) */ +# pragma GCC diagnostic ignored "-Wmissing-field-initializers" /* GCC bug 53119 : doesn't accept {0} nor {} as initializer (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119) */ #endif /************************************** -Memory routines +* Memory routines **************************************/ #include <stdlib.h> /* malloc, calloc, free */ #define ALLOCATOR(s) calloc(1,s) @@ -62,7 +62,7 @@ Memory routines /************************************** -Includes +* Includes **************************************/ #include "lz4frame_static.h" #include "lz4.h" @@ -71,7 +71,7 @@ Includes /************************************** -Basic Types +* Basic Types **************************************/ #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */ # include <stdint.h> @@ -90,7 +90,7 @@ typedef unsigned long long U64; /************************************** -Constants +* Constants **************************************/ #define KB *(1<<10) #define MB *(1<<20) @@ -110,7 +110,7 @@ Constants static const U32 minHClevel = 3; /************************************** -Structures and local types +* Structures and local types **************************************/ typedef struct { @@ -150,12 +150,7 @@ typedef struct /************************************** -Macros -**************************************/ - - -/************************************** -Error management +* Error management **************************************/ #define LZ4F_GENERATE_STRING(STRING) #STRING, static const char* LZ4F_errorStrings[] = { LZ4F_LIST_ERRORS(LZ4F_GENERATE_STRING) }; @@ -175,7 +170,7 @@ const char* LZ4F_getErrorName(LZ4F_errorCode_t code) /************************************** -Private functions +* Private functions **************************************/ static size_t LZ4F_getBlockSize(unsigned blockSizeID) { @@ -215,14 +210,15 @@ static BYTE LZ4F_headerChecksum (const BYTE* header, size_t length) /************************************** -Simple compression functions +* Simple compression functions **************************************/ size_t LZ4F_compressFrameBound(size_t srcSize, const LZ4F_preferences_t* preferencesPtr) { - LZ4F_preferences_t prefs = { 0 }; + LZ4F_preferences_t prefs; size_t headerSize; size_t streamSize; + memset(&prefs, 0, sizeof(prefs)); if (preferencesPtr!=NULL) prefs = *preferencesPtr; { blockSizeID_t proposedBSID = max64KB; @@ -234,7 +230,7 @@ size_t LZ4F_compressFrameBound(size_t srcSize, const LZ4F_preferences_t* prefere prefs.frameInfo.blockSizeID = proposedBSID; break; } - proposedBSID++; + proposedBSID = (blockSizeID_t)( ((int)proposedBSID) + 1); maxBlockSize <<= 2; } } @@ -258,14 +254,17 @@ size_t LZ4F_compressFrameBound(size_t srcSize, const LZ4F_preferences_t* prefere */ size_t LZ4F_compressFrame(void* dstBuffer, size_t dstMaxSize, const void* srcBuffer, size_t srcSize, const LZ4F_preferences_t* preferencesPtr) { - LZ4F_cctx_internal_t cctxI = { 0 }; /* works because no allocation */ - LZ4F_preferences_t prefs = { 0 }; - LZ4F_compressOptions_t options = { 0 }; + LZ4F_cctx_internal_t cctxI; + LZ4F_preferences_t prefs; + LZ4F_compressOptions_t options; LZ4F_errorCode_t errorCode; BYTE* const dstStart = (BYTE*) dstBuffer; BYTE* dstPtr = dstStart; BYTE* const dstEnd = dstStart + dstMaxSize; + memset(&cctxI, 0, sizeof(cctxI)); /* works because no allocation */ + memset(&prefs, 0, sizeof(prefs)); + memset(&options, 0, sizeof(options)); cctxI.version = LZ4F_VERSION; cctxI.maxBufferSize = 5 MB; /* mess with real buffer size to prevent allocation; works because autoflush==1 & stableSrc==1 */ @@ -281,7 +280,7 @@ size_t LZ4F_compressFrame(void* dstBuffer, size_t dstMaxSize, const void* srcBuf prefs.frameInfo.blockSizeID = proposedBSID; break; } - proposedBSID++; + proposedBSID = (blockSizeID_t)((int)proposedBSID + 1); maxBlockSize <<= 2; } } @@ -361,7 +360,7 @@ LZ4F_errorCode_t LZ4F_freeCompressionContext(LZ4F_compressionContext_t LZ4F_comp */ size_t LZ4F_compressBegin(LZ4F_compressionContext_t compressionContext, void* dstBuffer, size_t dstMaxSize, const LZ4F_preferences_t* preferencesPtr) { - LZ4F_preferences_t prefNull = { 0 }; + LZ4F_preferences_t prefNull; LZ4F_cctx_internal_t* cctxPtr = (LZ4F_cctx_internal_t*)compressionContext; BYTE* const dstStart = (BYTE*)dstBuffer; BYTE* dstPtr = dstStart; @@ -370,6 +369,7 @@ size_t LZ4F_compressBegin(LZ4F_compressionContext_t compressionContext, void* ds if (dstMaxSize < LZ4F_MAXHEADERFRAME_SIZE) return (size_t)-ERROR_dstMaxSize_tooSmall; if (cctxPtr->cStage != 0) return (size_t)-ERROR_GENERIC; + memset(&prefNull, 0, sizeof(prefNull)); if (preferencesPtr == NULL) preferencesPtr = &prefNull; cctxPtr->prefs = *preferencesPtr; @@ -436,7 +436,7 @@ size_t LZ4F_compressBegin(LZ4F_compressionContext_t compressionContext, void* ds * */ size_t LZ4F_compressBound(size_t srcSize, const LZ4F_preferences_t* preferencesPtr) { - const LZ4F_preferences_t prefsNull = { 0 }; + const LZ4F_preferences_t prefsNull = {}; /* init to zero */ const LZ4F_preferences_t* prefsPtr = (preferencesPtr==NULL) ? &prefsNull : preferencesPtr; blockSizeID_t bid = prefsPtr->frameInfo.blockSizeID; size_t blockSize = LZ4F_getBlockSize(bid); @@ -444,9 +444,8 @@ size_t LZ4F_compressBound(size_t srcSize, const LZ4F_preferences_t* preferencesP size_t lastBlockSize = prefsPtr->autoFlush ? srcSize % blockSize : blockSize; size_t blockInfo = 4; /* default, without block CRC option */ size_t frameEnd = 4 + (prefsPtr->frameInfo.contentChecksumFlag*4); - size_t result = (blockInfo * nbBlocks) + (blockSize * (nbBlocks-1)) + lastBlockSize + frameEnd; - return result; + return (blockInfo * nbBlocks) + (blockSize * (nbBlocks-1)) + lastBlockSize + frameEnd;; } @@ -712,7 +711,7 @@ LZ4F_errorCode_t LZ4F_createDecompressionContext(LZ4F_compressionContext_t* LZ4F { LZ4F_dctx_internal_t* dctxPtr; - dctxPtr = ALLOCATOR(sizeof(LZ4F_dctx_internal_t)); + dctxPtr = (LZ4F_dctx_internal_t*)ALLOCATOR(sizeof(LZ4F_dctx_internal_t)); if (dctxPtr==NULL) return (LZ4F_errorCode_t)-ERROR_GENERIC; dctxPtr->version = versionNumber; @@ -732,11 +731,12 @@ LZ4F_errorCode_t LZ4F_freeDecompressionContext(LZ4F_compressionContext_t LZ4F_de /* Decompression */ -static size_t LZ4F_decodeHeader(LZ4F_dctx_internal_t* dctxPtr, const BYTE* srcPtr, size_t srcSize) +static size_t LZ4F_decodeHeader(LZ4F_dctx_internal_t* dctxPtr, const void* srcVoidPtr, size_t srcSize) { BYTE FLG, BD, HC; unsigned version, blockMode, blockChecksumFlag, contentSizeFlag, contentChecksumFlag, dictFlag, blockSizeID; size_t bufferNeeded; + const BYTE* srcPtr = (const BYTE*)srcVoidPtr; /* need to decode header to get frameInfo */ if (srcSize < 7) return (size_t)-ERROR_GENERIC; /* minimal header size */ @@ -747,7 +747,7 @@ static size_t LZ4F_decodeHeader(LZ4F_dctx_internal_t* dctxPtr, const BYTE* srcPt /* Flags */ FLG = srcPtr[0]; - version = (FLG>>6)&_2BITS; + version = (FLG>>6) & _2BITS; blockMode = (FLG>>5) & _1BIT; blockChecksumFlag = (FLG>>4) & _1BIT; contentSizeFlag = (FLG>>3) & _1BIT; @@ -761,19 +761,19 @@ static size_t LZ4F_decodeHeader(LZ4F_dctx_internal_t* dctxPtr, const BYTE* srcPt if (HC != srcPtr[2]) return (size_t)-ERROR_GENERIC; /* Bad header checksum error */ /* validate */ - if (version != 1) return (size_t)-ERROR_GENERIC; /* Version Number, only supported value */ - if (blockChecksumFlag != 0) return (size_t)-ERROR_GENERIC; /* Only supported value for the time being */ + if (version != 1) return (size_t)-ERROR_GENERIC; /* Version Number, only supported value */ + if (blockChecksumFlag != 0) return (size_t)-ERROR_GENERIC; /* Only supported value for the time being */ if (contentSizeFlag != 0) return (size_t)-ERROR_GENERIC; /* Only supported value for the time being */ - if (((FLG>>1)&_1BIT) != 0) return (size_t)-ERROR_GENERIC; /* Reserved bit */ - if (dictFlag != 0) return (size_t)-ERROR_GENERIC; /* Only supported value for the time being */ + if (((FLG>>1)&_1BIT) != 0) return (size_t)-ERROR_GENERIC; /* Reserved bit */ + if (dictFlag != 0) return (size_t)-ERROR_GENERIC; /* Only supported value for the time being */ if (((BD>>7)&_1BIT) != 0) return (size_t)-ERROR_GENERIC; /* Reserved bit */ - if (blockSizeID < 4) return (size_t)-ERROR_GENERIC; /* Only supported values for the time being */ - if (((BD>>0)&_4BITS) != 0) return (size_t)-ERROR_GENERIC; /* Reserved bits */ + if (blockSizeID < 4) return (size_t)-ERROR_GENERIC; /* 4-7 only supported values for the time being */ + if (((BD>>0)&_4BITS) != 0) return (size_t)-ERROR_GENERIC; /* Reserved bits */ /* save */ - dctxPtr->frameInfo.blockMode = blockMode; - dctxPtr->frameInfo.contentChecksumFlag = contentChecksumFlag; - dctxPtr->frameInfo.blockSizeID = blockSizeID; + dctxPtr->frameInfo.blockMode = (blockMode_t)blockMode; + dctxPtr->frameInfo.contentChecksumFlag = (contentChecksum_t)contentChecksumFlag; + dctxPtr->frameInfo.blockSizeID = (blockSizeID_t)blockSizeID; dctxPtr->maxBlockSize = LZ4F_getBlockSize(blockSizeID); /* init */ @@ -786,9 +786,9 @@ static size_t LZ4F_decodeHeader(LZ4F_dctx_internal_t* dctxPtr, const BYTE* srcPt FREEMEM(dctxPtr->tmpIn); FREEMEM(dctxPtr->tmpOutBuffer); dctxPtr->maxBufferSize = bufferNeeded; - dctxPtr->tmpIn = ALLOCATOR(dctxPtr->maxBlockSize); + dctxPtr->tmpIn = (BYTE*)ALLOCATOR(dctxPtr->maxBlockSize); if (dctxPtr->tmpIn == NULL) return (size_t)-ERROR_GENERIC; - dctxPtr->tmpOutBuffer= ALLOCATOR(dctxPtr->maxBufferSize); + dctxPtr->tmpOutBuffer= (BYTE*)ALLOCATOR(dctxPtr->maxBufferSize); if (dctxPtr->tmpOutBuffer== NULL) return (size_t)-ERROR_GENERIC; } dctxPtr->tmpInSize = 0; @@ -880,15 +880,6 @@ static void LZ4F_updateDict(LZ4F_dctx_internal_t* dctxPtr, const BYTE* dstPtr, s if (withinTmp) /* copy relevant dict portion in front of tmpOut within tmpOutBuffer */ { -#if 0 - size_t savedDictSize = dctxPtr->tmpOut - dctxPtr->tmpOutBuffer; - memcpy(dctxPtr->tmpOutBuffer, dctxPtr->dict + dctxPtr->dictSize - dctxPtr->tmpOutStart- savedDictSize, savedDictSize); - dctxPtr->dict = dctxPtr->tmpOutBuffer; - dctxPtr->dictSize = savedDictSize + dctxPtr->tmpOutStart + dstSize; - return; - -#else - size_t preserveSize = dctxPtr->tmpOut - dctxPtr->tmpOutBuffer; size_t copySize = 64 KB - dctxPtr->tmpOutSize; BYTE* oldDictEnd = dctxPtr->dict + dctxPtr->dictSize - dctxPtr->tmpOutStart; @@ -900,7 +891,6 @@ static void LZ4F_updateDict(LZ4F_dctx_internal_t* dctxPtr, const BYTE* dstPtr, s dctxPtr->dict = dctxPtr->tmpOutBuffer; dctxPtr->dictSize = preserveSize + dctxPtr->tmpOutStart + dstSize; return; -#endif } if (dctxPtr->dict == dctxPtr->tmpOutBuffer) /* copy dst into tmp to complete dict */ |