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42 lines
1.0 KiB
C++
Executable File
42 lines
1.0 KiB
C++
Executable File
// OffsetStream.cpp
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#include "StdAfx.h"
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#include "Common/Defs.h"
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#include "OffsetStream.h"
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HRESULT COffsetOutStream::Init(IOutStream *stream, UINT64 offset)
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{
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_offset = offset;
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_stream = stream;
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return _stream->Seek(offset, STREAM_SEEK_SET, NULL);
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}
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STDMETHODIMP COffsetOutStream::Write(const void *data, UINT32 size,
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UINT32 *processedSize)
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{
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return _stream->Write(data, size, processedSize);
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}
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STDMETHODIMP COffsetOutStream::WritePart(const void *data, UINT32 size, UINT32 *processedSize)
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{
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return _stream->WritePart(data, size, processedSize);
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}
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STDMETHODIMP COffsetOutStream::Seek(INT64 offset, UINT32 seekOrigin,
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UINT64 *newPosition)
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{
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UINT64 absoluteNewPosition;
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if (seekOrigin == STREAM_SEEK_SET)
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offset += _offset;
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HRESULT result = _stream->Seek(offset, seekOrigin, &absoluteNewPosition);
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if (newPosition != NULL)
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*newPosition = absoluteNewPosition - _offset;
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return result;
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}
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STDMETHODIMP COffsetOutStream::SetSize(INT64 newSize)
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{
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return _stream->SetSize(_offset + newSize);
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}
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