size_t FSE_decompress_wksp(void* dst, size_t dstCapacity, const void* cSrc, size_t cSrcSize, FSE_DTable* workSpace, unsigned maxLog) { const BYTE* const istart = (const BYTE*)cSrc; const BYTE* ip = istart; short counting[FSE_MAX_SYMBOL_VALUE+1]; unsigned tableLog; unsigned maxSymbolValue = FSE_MAX_SYMBOL_VALUE; /* normal FSE decoding mode */ size_t const NCountLength = FSE_readNCount (counting, &maxSymbolValue, &tableLog, istart, cSrcSize); if (FSE_isError(NCountLength)) return NCountLength; //if (NCountLength >= cSrcSize) return ERROR(srcSize_wrong); /* too small input size; supposed to be already checked in NCountLength, only remaining case : NCountLength==cSrcSize */ if (tableLog > maxLog) return ERROR(tableLog_tooLarge); ip += NCountLength; cSrcSize -= NCountLength; CHECK_F( FSE_buildDTable (workSpace, counting, maxSymbolValue, tableLog) ); return FSE_decompress_usingDTable (dst, dstCapacity, ip, cSrcSize, workSpace); /* always return, even if it is an error code */ }
size_t FSE_decompress(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize) { const BYTE* const istart = (const BYTE*)cSrc; const BYTE* ip = istart; short counting[FSE_MAX_SYMBOL_VALUE+1]; DTable_max_t dt; /* Static analyzer seems unable to understand this table will be properly initialized later */ unsigned tableLog; unsigned maxSymbolValue = FSE_MAX_SYMBOL_VALUE; if (cSrcSize<2) return ERROR(srcSize_wrong); /* too small input size */ /* normal FSE decoding mode */ { size_t const NCountLength = FSE_readNCount (counting, &maxSymbolValue, &tableLog, istart, cSrcSize); if (FSE_isError(NCountLength)) return NCountLength; if (NCountLength >= cSrcSize) return ERROR(srcSize_wrong); /* too small input size */ ip += NCountLength; cSrcSize -= NCountLength; } CHECK_F( FSE_buildDTable (dt, counting, maxSymbolValue, tableLog) ); return FSE_decompress_usingDTable (dst, maxDstSize, ip, cSrcSize, dt); /* always return, even if it is an error code */ }