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