// 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); | |
} |