vcl/source/treelist/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 <vcl/imap.hxx>
  21
  22 #include <tools/debug.hxx>
  23
  24 /******************************************************************************
  25 |*
  26 |* Ctor
  27 |*
  28 \******************************************************************************/
  29
  30 IMapCompat::IMapCompat(SvStream& rStm, const StreamMode nStreamMode)
  31     : pRWStm(&rStm)
  32     , nCompatPos(0)
  33     , nTotalSize(0)
  34     , nStmMode(nStreamMode)
  35 {
  36     DBG_ASSERT(nStreamMode == StreamMode::READ || nStreamMode == StreamMode::WRITE, "Wrong Mode!");
  37
  38     if (pRWStm->GetError())
  39         return;
  40
  41     if (nStmMode == StreamMode::WRITE)
  42     {
  43         nCompatPos = pRWStm->Tell();
  44         pRWStm->SeekRel(4);
  45         nTotalSize = nCompatPos + 4;
  46     }
  47     else
  48     {
  49         sal_uInt32 nTotalSizeTmp;
  50         pRWStm->ReadUInt32(nTotalSizeTmp);
  51         nTotalSize = nTotalSizeTmp;
  52         nCompatPos = pRWStm->Tell();
  53     }
  54 }
  55
  56 /******************************************************************************
  57 |*
  58 |* Dtor
  59 |*
  60 \******************************************************************************/
  61
  62 IMapCompat::~IMapCompat()
  63 {
  64     if (pRWStm->GetError())
  65         return;
  66
  67     if (nStmMode == StreamMode::WRITE)
  68     {
  69         const sal_uInt64 nEndPos = pRWStm->Tell();
  70
  71         pRWStm->Seek(nCompatPos);
  72         pRWStm->WriteUInt32(nEndPos - nTotalSize);
  73         pRWStm->Seek(nEndPos);
  74     }
  75     else
  76     {
  77         const sal_uInt64 nReadSize = pRWStm->Tell() - nCompatPos;
  78
  79         if (nTotalSize > nReadSize)
  80             pRWStm->SeekRel(nTotalSize - nReadSize);
  81     }
  82 }
  83
  84 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */