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