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// OffsetStream.cpp↩
↩
#include "StdAfx.h"↩
↩
#include "../../Common/Defs.h"↩
↩
#include "OffsetStream.h"↩
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HRESULT COffsetOutStream::Init(IOutStream *stream, UInt64 offset)↩
{↩
_offset = offset;↩
_stream = stream;↩
return _stream->Seek(offset, STREAM_SEEK_SET, NULL);↩
}↩
↩
STDMETHODIMP COffsetOutStream::Write(const void *data, UInt32 size, UInt32 *processedSize)↩
{↩
return _stream->Write(data, size, processedSize);↩
}↩
↩
STDMETHODIMP COffsetOutStream::Seek(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition)↩
{↩
UInt64 absoluteNewPosition;↩
if (seekOrigin == STREAM_SEEK_SET)↩
{↩
if (offset < 0)↩
return HRESULT_WIN32_ERROR_NEGATIVE_SEEK;↩
offset += _offset;↩
}↩
HRESULT result = _stream->Seek(offset, seekOrigin, &absoluteNewPosition);↩
if (newPosition)↩
*newPosition = absoluteNewPosition - _offset;↩
return result;↩
}↩
↩
STDMETHODIMP COffsetOutStream::SetSize(UInt64 newSize)↩
{↩
return _stream->SetSize(_offset + newSize);↩
}↩