1 // InStreamWithCRC.cpp 2 3 #include "StdAfx.h" 4 5 #include "InStreamWithCRC.h" 6 7 STDMETHODIMP CSequentialInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize) 8 { 9 UInt32 realProcessedSize; 10 HRESULT result = _stream->Read(data, size, &realProcessedSize); 11 _size += realProcessedSize; 12 if (size > 0 && realProcessedSize == 0) 13 _wasFinished = true; 14 _crc = CrcUpdate(_crc, data, realProcessedSize); 15 if(processedSize != NULL) 16 *processedSize = realProcessedSize; 17 return result; 18 } 19 20 STDMETHODIMP CInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize) 21 { 22 UInt32 realProcessedSize; 23 HRESULT result = _stream->Read(data, size, &realProcessedSize); 24 /* 25 if (size > 0 && realProcessedSize == 0) 26 _wasFinished = true; 27 */ 28 _size += realProcessedSize; 29 _crc = CrcUpdate(_crc, data, realProcessedSize); 30 if(processedSize != NULL) 31 *processedSize = realProcessedSize; 32 return result; 33 } 34 35 STDMETHODIMP CInStreamWithCRC::Seek(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) 36 { 37 if (seekOrigin != STREAM_SEEK_SET || offset != 0) 38 return E_FAIL; 39 _size = 0; 40 _crc = CRC_INIT_VAL; 41 return _stream->Seek(offset, seekOrigin, newPosition); 42 } 43
