/
InStreamWithCRC.cpp
40 lines (35 loc) · 1.15 KB
/
InStreamWithCRC.cpp
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// InStreamWithCRC.cpp
#include "StdAfx.h"
#include "InStreamWithCRC.h"
STDMETHODIMP CSequentialInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize)
{
UInt32 realProcessedSize;
HRESULT result = _stream->Read(data, size, &realProcessedSize);
_size += realProcessedSize;
if (size > 0 && realProcessedSize == 0)
_wasFinished = true;
_crc = CrcUpdate(_crc, data, realProcessedSize);
if(processedSize != NULL)
*processedSize = realProcessedSize;
return result;
}
STDMETHODIMP CInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize)
{
UInt32 realProcessedSize;
HRESULT result = _stream->Read(data, size, &realProcessedSize);
if (size > 0 && realProcessedSize == 0)
_wasFinished = true;
_size += realProcessedSize;
_crc = CrcUpdate(_crc, data, realProcessedSize);
if(processedSize != NULL)
*processedSize = realProcessedSize;
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);
}