ulib/lz4/lz4frame.c

188 static U32 LZ4F_readLE32 (const BYTE* srcPtr)
190     U32 value32 = srcPtr[0];
191     value32 += (srcPtr[1]<<8);
192     value32 += (srcPtr[2]<<16);
193     value32 += ((U32)srcPtr[3])<<24;
205 static U64 LZ4F_readLE64 (const BYTE* srcPtr)
207     U64 value64 = srcPtr[0];
208     value64 += ((U64)srcPtr[1]<<8);
209     value64 += ((U64)srcPtr[2]<<16);
210     value64 += ((U64)srcPtr[3]<<24);
211     value64 += ((U64)srcPtr[4]<<32);
212     value64 += ((U64)srcPtr[5]<<40);
213     value64 += ((U64)srcPtr[6]<<48);
214     value64 += ((U64)srcPtr[7]<<56);
567     const BYTE* srcPtr = (const BYTE*)srcBuffer;
568     const BYTE* const srcEnd = srcPtr + srcSize;
591             srcPtr = srcEnd;
600             srcPtr += sizeToCopy;
609     while ((size_t)(srcEnd - srcPtr) >= blockSize)
613         dstPtr += LZ4F_compressBlock(dstPtr, srcPtr, blockSize, compress, cctxPtr->lz4CtxPtr, cctxPtr->prefs.compressionLevel);
614         srcPtr += blockSize;
617     if ((cctxPtr->prefs.autoFlush) && (srcPtr < srcEnd))
621         dstPtr += LZ4F_compressBlock(dstPtr, srcPtr, srcEnd - srcPtr, compress, cctxPtr->lz4CtxPtr, cctxPtr->prefs.compressionLevel);
622         srcPtr  = srcEnd;
649     if (srcPtr < srcEnd)
652         size_t sizeToCopy = srcEnd - srcPtr;
653         memcpy(cctxPtr->tmpIn, srcPtr, sizeToCopy);
816     const BYTE* srcPtr = (const BYTE*)srcVoidPtr;
823     if ((LZ4F_readLE32(srcPtr) & 0xFFFFFFF0U) == LZ4F_MAGIC_SKIPPABLE_START)
841     if (LZ4F_readLE32(srcPtr) != LZ4F_MAGICNUMBER) return (size_t)-LZ4F_ERROR_frameType_unknown;
845     FLG = srcPtr[4];
858         if (srcPtr != dctxPtr->header)
859             memcpy(dctxPtr->header, srcPtr, srcSize);
866     BD = srcPtr[5];
878     HC = LZ4F_headerChecksum(srcPtr+4, frameHeaderSize-5);
879     if (HC != srcPtr[frameHeaderSize-1]) return (size_t)-LZ4F_ERROR_headerChecksum_invalid;   /* Bad header checksum error */
887         dctxPtr->frameRemainingSize = dctxPtr->frameInfo.contentSize = LZ4F_readLE64(srcPtr+6);
1053     const BYTE* srcPtr = srcStart;
1083                 if ((size_t)(srcEnd-srcPtr) >= maxFHSize)   /* enough to decode - shortcut */
1085                     LZ4F_errorCode_t errorCode = LZ4F_decodeHeader(dctxPtr, srcPtr, srcEnd-srcPtr);
1087                     srcPtr += errorCode;
1098                 if (sizeToCopy > (size_t)(srcEnd - srcPtr)) sizeToCopy =  srcEnd - srcPtr;
1099                 memcpy(dctxPtr->header + dctxPtr->tmpInSize, srcPtr, sizeToCopy);
1101                 srcPtr += sizeToCopy;
1117                 if ((size_t)(srcEnd - srcPtr) >= BHSize)
1119                     selectedIn = srcPtr;
1120                     srcPtr += BHSize;
1134                 if (sizeToCopy > (size_t)(srcEnd - srcPtr)) sizeToCopy = srcEnd - srcPtr;
1135                 memcpy(dctxPtr->tmpIn + dctxPtr->tmpInSize, srcPtr, sizeToCopy);
1136                 srcPtr += sizeToCopy;
1174                 if ((size_t)(srcEnd-srcPtr) < sizeToCopy) sizeToCopy = srcEnd - srcPtr;  /* not enough input to read full block */
1176                 memcpy(dstPtr, srcPtr, sizeToCopy);
1177                 if (dctxPtr->frameInfo.contentChecksumFlag) XXH32_update(&(dctxPtr->xxh), srcPtr, sizeToCopy);
1184                 srcPtr += sizeToCopy;
1199                 if ((size_t)(srcEnd-srcPtr) < dctxPtr->tmpInTarget)
1205                 selectedIn = srcPtr;
1206                 srcPtr += dctxPtr->tmpInTarget;
1214                 if (sizeToCopy > (size_t)(srcEnd-srcPtr)) sizeToCopy = srcEnd-srcPtr;
1215                 memcpy(dctxPtr->tmpIn + dctxPtr->tmpInSize, srcPtr, sizeToCopy);
1217                 srcPtr += sizeToCopy;
1339                 if ((srcEnd - srcPtr) < 4)   /* not enough size for entire CRC */
1346                     selectedIn = srcPtr;
1347                     srcPtr += 4;
1355                 if (sizeToCopy > (size_t)(srcEnd - srcPtr)) sizeToCopy = srcEnd - srcPtr;
1356                 memcpy(dctxPtr->tmpIn + dctxPtr->tmpInSize, srcPtr, sizeToCopy);
1357                 srcPtr += sizeToCopy;
1381                 if ((srcEnd - srcPtr) >= 4)
1383                     selectedIn = srcPtr;
1384                     srcPtr += 4;
1399                 if (sizeToCopy > (size_t)(srcEnd - srcPtr)) sizeToCopy = srcEnd - srcPtr;
1400                 memcpy(dctxPtr->header + dctxPtr->tmpInSize, srcPtr, sizeToCopy);
1401                 srcPtr += sizeToCopy;
1424                 if (skipSize > (size_t)(srcEnd-srcPtr)) skipSize = srcEnd-srcPtr;
1425                 srcPtr += skipSize;
1471     if (srcPtr<srcEnd)
1472         dctxPtr->srcExpect = srcPtr;
1476     *srcSizePtr = (srcPtr - srcStart);