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/stream.hxx>
      21             : #include <tools/vcompat.hxx>
      22             : 
      23           0 : VersionCompat::VersionCompat( SvStream& rStm, sal_uInt16 nStreamMode, sal_uInt16 nVersion ) :
      24             :             mpRWStm     ( &rStm ),
      25             :             mnCompatPos ( 0 ),
      26             :             mnTotalSize ( 0 ),
      27             :             mnStmMode   ( nStreamMode ),
      28           0 :             mnVersion   ( nVersion )
      29             : {
      30           0 :     if( !mpRWStm->GetError() )
      31             :     {
      32           0 :         if( STREAM_WRITE == mnStmMode )
      33             :         {
      34           0 :             mpRWStm->WriteUInt16( mnVersion );
      35           0 :             mnTotalSize = ( mnCompatPos = mpRWStm->Tell() ) + 4UL;
      36           0 :             mpRWStm->SeekRel( 4L );
      37             :         }
      38             :         else
      39             :         {
      40           0 :             mpRWStm->ReadUInt16( mnVersion );
      41           0 :             mpRWStm->ReadUInt32( mnTotalSize );
      42           0 :             mnCompatPos = mpRWStm->Tell();
      43             :         }
      44             :     }
      45           0 : }
      46             : 
      47           0 : VersionCompat::~VersionCompat()
      48             : {
      49           0 :     if( STREAM_WRITE == mnStmMode )
      50             :     {
      51           0 :         const sal_uInt32 nEndPos = mpRWStm->Tell();
      52             : 
      53           0 :         mpRWStm->Seek( mnCompatPos );
      54           0 :         mpRWStm->WriteUInt32(  nEndPos - mnTotalSize  );
      55           0 :         mpRWStm->Seek( nEndPos );
      56             :     }
      57             :     else
      58             :     {
      59           0 :         const sal_uInt32 nReadSize = mpRWStm->Tell() - mnCompatPos;
      60             : 
      61           0 :         if( mnTotalSize > nReadSize )
      62           0 :             mpRWStm->SeekRel( mnTotalSize - nReadSize );
      63             :     }
      64           0 : }
      65             : 
      66             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */