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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <tools/stream.hxx>
#include <tools/vcompat.hxx>
VersionCompatRead::VersionCompatRead(SvStream& rStm)
: mrRStm(rStm)
, mnCompatPos(0)
, mnTotalSize(0)
, mnVersion(1)
{
if (mrRStm.GetError())
return;
mrRStm.ReadUInt16(mnVersion);
mrRStm.ReadUInt32(mnTotalSize);
mnCompatPos = mrRStm.Tell();
}
VersionCompatWrite::VersionCompatWrite(SvStream& rStm, sal_uInt16 nVersion)
: mrWStm(rStm)
, mnCompatPos(0)
, mnTotalSize(0)
{
if (mrWStm.GetError())
return;
mrWStm.WriteUInt16(nVersion);
mnCompatPos = mrWStm.Tell();
mnTotalSize = mnCompatPos + 4;
mrWStm.SeekRel(4);
}
VersionCompatRead::~VersionCompatRead()
{
const sal_uInt32 nReadSize = mrRStm.Tell() - mnCompatPos;
if (mnTotalSize > nReadSize)
mrRStm.SeekRel(mnTotalSize - nReadSize);
}
VersionCompatWrite::~VersionCompatWrite()
{
const sal_uInt32 nEndPos = mrWStm.Tell();
mrWStm.Seek(mnCompatPos);
mrWStm.WriteUInt32(nEndPos - mnTotalSize);
mrWStm.Seek(nEndPos);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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