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