/* -*- 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: */