svtools/source/misc/imap3.cxx

   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 IMapCompat::IMapCompat( SvStream& rStm, const sal_uInt16 nStreamMode ) :
  32             pRWStm      ( &rStm ),
  33             nStmMode    ( nStreamMode )
  34 {
  35     DBG_ASSERT( nStreamMode == STREAM_READ || nStreamMode == STREAM_WRITE, "Wrong Mode!" );
  36
  37     if ( !pRWStm->GetError() )
  38     {
  39         if ( nStmMode == STREAM_WRITE )
  40         {
  41             nCompatPos = pRWStm->Tell();
  42             pRWStm->SeekRel( 4 );
  43             nTotalSize = nCompatPos + 4;
  44         }
  45         else
  46         {
  47             sal_uInt32 nTotalSizeTmp;
  48             *pRWStm >> nTotalSizeTmp;
  49             nTotalSize = nTotalSizeTmp;
  50             nCompatPos = pRWStm->Tell();
  51         }
  52     }
  53 }
  54
  55
  56 /******************************************************************************
  57 |*
  58 |* Dtor
  59 |*
  60 \******************************************************************************/
  61
  62 IMapCompat::~IMapCompat()
  63 {
  64     if ( !pRWStm->GetError() )
  65     {
  66         if ( nStmMode == STREAM_WRITE )
  67         {
  68             const sal_uLong nEndPos = pRWStm->Tell();
  69
  70             pRWStm->Seek( nCompatPos );
  71             *pRWStm << (sal_uInt32) ( nEndPos - nTotalSize );
  72             pRWStm->Seek( nEndPos );
  73         }
  74         else
  75         {
  76             const sal_uLong nReadSize = pRWStm->Tell() - nCompatPos;
  77
  78             if ( nTotalSize > nReadSize )
  79                 pRWStm->SeekRel( nTotalSize - nReadSize );
  80         }
  81     }
  82 }
  83
  84
  85
  86 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */