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 realProcessed = 0; 10 HRESULT result = S_OK; 11 if (_stream) 12 result = _stream->Read(data, size, &realProcessed); 13 _size += realProcessed; 14 if (size != 0 && realProcessed == 0) 15 _wasFinished = true; 16 _crc = CrcUpdate(_crc, data, realProcessed); 17 if (processedSize) 18 *processedSize = realProcessed; 19 return result; 20 } 21 22 STDMETHODIMP CInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize) 23 { 24 UInt32 realProcessed = 0; 25 HRESULT result = S_OK; 26 if (_stream) 27 result = _stream->Read(data, size, &realProcessed); 28 _size += realProcessed; 29 /* 30 if (size != 0 && realProcessed == 0) 31 _wasFinished = true; 32 */ 33 _crc = CrcUpdate(_crc, data, realProcessed); 34 if (processedSize) 35 *processedSize = realProcessed; 36 return result; 37 } 38 39 STDMETHODIMP CInStreamWithCRC::Seek(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) 40 { 41 if (seekOrigin != STREAM_SEEK_SET || offset != 0) 42 return E_FAIL; 43 _size = 0; 44 _crc = CRC_INIT_VAL; 45 return _stream->Seek(offset, seekOrigin, newPosition); 46 } 47
