41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
// 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);
|
|
}
|