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      417803 : VersionCompat::VersionCompat( SvStream& rStm, sal_uInt16 nStreamMode, sal_uInt16 nVersion ) :
      24             :             mpRWStm     ( &rStm ),
      25             :             mnStmMode   ( nStreamMode ),
      26      417803 :             mnVersion   ( nVersion )
      27             : {
      28      417803 :     if( !mpRWStm->GetError() )
      29             :     {
      30      417803 :         if( STREAM_WRITE == mnStmMode )
      31             :         {
      32      216392 :             *mpRWStm << mnVersion;
      33      216392 :             mnTotalSize = ( mnCompatPos = mpRWStm->Tell() ) + 4UL;
      34      216392 :             mpRWStm->SeekRel( 4L );
      35             :         }
      36             :         else
      37             :         {
      38      201411 :             *mpRWStm >> mnVersion;
      39      201411 :             *mpRWStm >> mnTotalSize;
      40      201411 :             mnCompatPos = mpRWStm->Tell();
      41             :         }
      42             :     }
      43      417803 : }
      44             : 
      45      417803 : VersionCompat::~VersionCompat()
      46             : {
      47      417803 :     if( STREAM_WRITE == mnStmMode )
      48             :     {
      49      216392 :         const sal_uInt32 nEndPos = mpRWStm->Tell();
      50             : 
      51      216392 :         mpRWStm->Seek( mnCompatPos );
      52      216392 :         *mpRWStm << ( nEndPos - mnTotalSize );
      53      216392 :         mpRWStm->Seek( nEndPos );
      54             :     }
      55             :     else
      56             :     {
      57      201411 :         const sal_uInt32 nReadSize = mpRWStm->Tell() - mnCompatPos;
      58             : 
      59      201411 :         if( mnTotalSize > nReadSize )
      60           0 :             mpRWStm->SeekRel( mnTotalSize - nReadSize );
      61             :     }
      62      417803 : }
      63             : 
      64             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */