Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include <svtools/imap.hxx>
      21             : 
      22             : #include <tools/debug.hxx>
      23             : 
      24             : 
      25             : /******************************************************************************
      26             : |*
      27             : |* Ctor
      28             : |*
      29             : \******************************************************************************/
      30             : 
      31           0 : IMapCompat::IMapCompat( SvStream& rStm, const StreamMode nStreamMode )
      32             :     : pRWStm(&rStm)
      33             :     , nCompatPos(0)
      34             :     , nTotalSize(0)
      35           0 :     , nStmMode(nStreamMode)
      36             : {
      37             :     DBG_ASSERT( nStreamMode == StreamMode::READ || nStreamMode == StreamMode::WRITE, "Wrong Mode!" );
      38             : 
      39           0 :     if ( !pRWStm->GetError() )
      40             :     {
      41           0 :         if ( nStmMode == StreamMode::WRITE )
      42             :         {
      43           0 :             nCompatPos = pRWStm->Tell();
      44           0 :             pRWStm->SeekRel( 4 );
      45           0 :             nTotalSize = nCompatPos + 4;
      46             :         }
      47             :         else
      48             :         {
      49             :             sal_uInt32 nTotalSizeTmp;
      50           0 :             pRWStm->ReadUInt32( nTotalSizeTmp );
      51           0 :             nTotalSize = nTotalSizeTmp;
      52           0 :             nCompatPos = pRWStm->Tell();
      53             :         }
      54             :     }
      55           0 : }
      56             : 
      57             : 
      58             : /******************************************************************************
      59             : |*
      60             : |* Dtor
      61             : |*
      62             : \******************************************************************************/
      63             : 
      64           0 : IMapCompat::~IMapCompat()
      65             : {
      66           0 :     if ( !pRWStm->GetError() )
      67             :     {
      68           0 :         if ( nStmMode == StreamMode::WRITE )
      69             :         {
      70           0 :             const sal_uLong nEndPos = pRWStm->Tell();
      71             : 
      72           0 :             pRWStm->Seek( nCompatPos );
      73           0 :             pRWStm->WriteUInt32( nEndPos - nTotalSize );
      74           0 :             pRWStm->Seek( nEndPos );
      75             :         }
      76             :         else
      77             :         {
      78           0 :             const sal_uLong nReadSize = pRWStm->Tell() - nCompatPos;
      79             : 
      80           0 :             if ( nTotalSize > nReadSize )
      81           0 :                 pRWStm->SeekRel( nTotalSize - nReadSize );
      82             :         }
      83             :     }
      84           0 : }
      85             : 
      86             : 
      87             : 
      88             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */