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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 <vcl/imap.hxx>
#include <tools/debug.hxx>
/******************************************************************************
|*
|* Ctor
|*
\******************************************************************************/
IMapCompat::IMapCompat(SvStream& rStm, const StreamMode nStreamMode)
: pRWStm(&rStm)
, nCompatPos(0)
, nTotalSize(0)
, nStmMode(nStreamMode)
{
DBG_ASSERT(nStreamMode == StreamMode::READ || nStreamMode == StreamMode::WRITE, "Wrong Mode!");
if (pRWStm->GetError())
return;
if (nStmMode == StreamMode::WRITE)
{
nCompatPos = pRWStm->Tell();
pRWStm->SeekRel(4);
nTotalSize = nCompatPos + 4;
}
else
{
sal_uInt32 nTotalSizeTmp;
pRWStm->ReadUInt32(nTotalSizeTmp);
nTotalSize = nTotalSizeTmp;
nCompatPos = pRWStm->Tell();
}
}
/******************************************************************************
|*
|* Dtor
|*
\******************************************************************************/
IMapCompat::~IMapCompat()
{
if (pRWStm->GetError())
return;
if (nStmMode == StreamMode::WRITE)
{
const sal_uInt64 nEndPos = pRWStm->Tell();
pRWStm->Seek(nCompatPos);
pRWStm->WriteUInt32(nEndPos - nTotalSize);
pRWStm->Seek(nEndPos);
}
else
{
const sal_uInt64 nReadSize = pRWStm->Tell() - nCompatPos;
if (nTotalSize > nReadSize)
pRWStm->SeekRel(nTotalSize - nReadSize);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
