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 <tools/debug.hxx>
      21             : 
      22             : #include "sdiocmpt.hxx"
      23             : 
      24           0 : old_SdrDownCompat::old_SdrDownCompat(SvStream& rNewStream, StreamMode nNewMode)
      25             : :   rStream(rNewStream),
      26             :     nSubRecSiz(0),
      27             :     nSubRecPos(0),
      28             :     nMode(nNewMode),
      29           0 :     bOpen(false)
      30             : {
      31           0 :     OpenSubRecord();
      32           0 : }
      33             : 
      34           0 : old_SdrDownCompat::~old_SdrDownCompat()
      35             : {
      36           0 :     if(bOpen)
      37           0 :         CloseSubRecord();
      38           0 : }
      39             : 
      40           0 : void old_SdrDownCompat::Read()
      41             : {
      42           0 :     rStream.ReadUInt32( nSubRecSiz );
      43           0 : }
      44             : 
      45           0 : void old_SdrDownCompat::Write()
      46             : {
      47           0 :     rStream.WriteUInt32( nSubRecSiz );
      48           0 : }
      49             : 
      50           0 : void old_SdrDownCompat::OpenSubRecord()
      51             : {
      52           0 :     if(rStream.GetError())
      53           0 :         return;
      54             : 
      55           0 :     nSubRecPos = rStream.Tell();
      56             : 
      57           0 :     if(nMode == StreamMode::READ)
      58             :     {
      59           0 :         Read();
      60             :     }
      61           0 :     else if(nMode == StreamMode::WRITE)
      62             :     {
      63           0 :         Write();
      64             :     }
      65             : 
      66           0 :     bOpen = true;
      67             : }
      68             : 
      69           0 : void old_SdrDownCompat::CloseSubRecord()
      70             : {
      71           0 :     if(rStream.GetError())
      72           0 :         return;
      73             : 
      74           0 :     sal_uInt32 nAktPos(rStream.Tell());
      75             : 
      76           0 :     if(nMode == StreamMode::READ)
      77             :     {
      78           0 :         sal_uInt32 nReadAnz(nAktPos - nSubRecPos);
      79           0 :         if(nReadAnz != nSubRecSiz)
      80             :         {
      81           0 :             rStream.Seek(nSubRecPos + nSubRecSiz);
      82             :         }
      83             :     }
      84           0 :     else if(nMode == StreamMode::WRITE)
      85             :     {
      86           0 :         nSubRecSiz = nAktPos - nSubRecPos;
      87           0 :         rStream.Seek(nSubRecPos);
      88           0 :         Write();
      89           0 :         rStream.Seek(nAktPos);
      90             :     }
      91             : 
      92           0 :     bOpen = false;
      93             : }
      94             : 
      95             : /*************************************************************************
      96             : |*
      97             : |* Constructor, writes and reads version number
      98             : |*
      99             : \************************************************************************/
     100             : 
     101           0 : SdIOCompat::SdIOCompat(SvStream& rNewStream, StreamMode nNewMode, sal_uInt16 nVer)
     102           0 : :   old_SdrDownCompat(rNewStream, nNewMode), nVersion(nVer)
     103             : {
     104           0 :     if (nNewMode == StreamMode::WRITE)
     105             :     {
     106             :         DBG_ASSERT(nVer != SDIOCOMPAT_VERSIONDONTKNOW,
     107             :                    "can´t write unknown version");
     108           0 :         rNewStream.WriteUInt16( nVersion );
     109             :     }
     110           0 :     else if (nNewMode == StreamMode::READ)
     111             :     {
     112             :         DBG_ASSERT(nVer == SDIOCOMPAT_VERSIONDONTKNOW,
     113             :                    "referring to the version while reading is silly!");
     114           0 :         rNewStream.ReadUInt16( nVersion );
     115             :     }
     116           0 : }
     117             : 
     118           0 : SdIOCompat::~SdIOCompat()
     119             : {
     120           0 : }
     121             : 
     122             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */