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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/debug.hxx>
#include <sdiocmpt.hxx>
old_SdrDownCompat::old_SdrDownCompat(SvStream& rNewStream, StreamMode nNewMode)
: rStream(rNewStream),
nSubRecSiz(0),
nSubRecPos(0),
nMode(nNewMode),
bOpen(false)
{
OpenSubRecord();
}
old_SdrDownCompat::~old_SdrDownCompat()
{
if(bOpen)
CloseSubRecord();
}
void old_SdrDownCompat::Write()
{
rStream.WriteUInt32( nSubRecSiz );
}
void old_SdrDownCompat::OpenSubRecord()
{
if(rStream.GetError())
return;
nSubRecPos = rStream.Tell();
if(nMode == StreamMode::READ)
{
rStream.ReadUInt32( nSubRecSiz );
}
else if(nMode == StreamMode::WRITE)
{
Write();
}
bOpen = true;
}
void old_SdrDownCompat::CloseSubRecord()
{
if(rStream.GetError())
return;
sal_uInt32 nCurrentPos(rStream.Tell());
if(nMode == StreamMode::READ)
{
sal_uInt32 nReadCnt(nCurrentPos - nSubRecPos);
if(nReadCnt != nSubRecSiz)
{
rStream.Seek(nSubRecPos + nSubRecSiz);
}
}
else if(nMode == StreamMode::WRITE)
{
nSubRecSiz = nCurrentPos - nSubRecPos;
rStream.Seek(nSubRecPos);
Write();
rStream.Seek(nCurrentPos);
}
bOpen = false;
}
/*************************************************************************
|*
|* Constructor, writes and reads version number
|*
\************************************************************************/
SdIOCompat::SdIOCompat(SvStream& rNewStream, StreamMode nNewMode, sal_uInt16 nVersion)
: old_SdrDownCompat(rNewStream, nNewMode)
{
if (nNewMode == StreamMode::WRITE)
{
DBG_ASSERT(nVersion != SDIOCOMPAT_VERSIONDONTKNOW,
"can't write unknown version");
rNewStream.WriteUInt16( nVersion );
}
else if (nNewMode == StreamMode::READ)
{
DBG_ASSERT(nVersion == SDIOCOMPAT_VERSIONDONTKNOW,
"referring to the version while reading is silly!");
rNewStream.ReadUInt16( nVersion );
}
}
SdIOCompat::~SdIOCompat()
{
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
