misc/libphysfs/lzma/CPP/7zip/Common/OffsetStream.cpp
author nemo
Mon, 10 Apr 2017 12:06:43 -0400
changeset 12213 bb5522e88ab2
permissions -rw-r--r--
bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
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// 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, 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::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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}