rlm@1: // InStreamWithCRC.cpp
rlm@1: 
rlm@1: #include "StdAfx.h"
rlm@1: 
rlm@1: #include "InStreamWithCRC.h"
rlm@1: 
rlm@1: STDMETHODIMP CSequentialInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize)
rlm@1: {
rlm@1:   UInt32 realProcessedSize;
rlm@1:   HRESULT result = _stream->Read(data, size, &realProcessedSize);
rlm@1:   _size += realProcessedSize;
rlm@1:   if (size > 0 && realProcessedSize == 0)
rlm@1:     _wasFinished = true;
rlm@1:   _crc = CrcUpdate(_crc, data, realProcessedSize);
rlm@1:   if(processedSize != NULL)
rlm@1:     *processedSize = realProcessedSize;
rlm@1:   return result;
rlm@1: }
rlm@1: 
rlm@1: STDMETHODIMP CInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize)
rlm@1: {
rlm@1:   UInt32 realProcessedSize;
rlm@1:   HRESULT result = _stream->Read(data, size, &realProcessedSize);
rlm@1:   if (size > 0 && realProcessedSize == 0)
rlm@1:     _wasFinished = true;
rlm@1:   _size += realProcessedSize;
rlm@1:   _crc = CrcUpdate(_crc, data, realProcessedSize);
rlm@1:   if(processedSize != NULL)
rlm@1:     *processedSize = realProcessedSize;
rlm@1:   return result;
rlm@1: }
rlm@1: 
rlm@1: STDMETHODIMP CInStreamWithCRC::Seek(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition)
rlm@1: {
rlm@1:   if (seekOrigin != STREAM_SEEK_SET || offset != 0)
rlm@1:     return E_FAIL;
rlm@1:   _size = 0;
rlm@1:   _crc = CRC_INIT_VAL;
rlm@1:   return _stream->Seek(offset, seekOrigin, newPosition);
rlm@1: }