sd/source/core/sdiocmpt.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 <tools/debug.hxx>
  21
  22 #include "sdiocmpt.hxx"
  23
  24 //////////////////////////////////////////////////////////////////////////////
  25
  26 old_SdrDownCompat::old_SdrDownCompat(SvStream& rNewStream, sal_uInt16 nNewMode)
  27 :   rStream(rNewStream),
  28     nSubRecSiz(0),
  29     nSubRecPos(0),
  30     nMode(nNewMode),
  31     bOpen(sal_False)
  32 {
  33     OpenSubRecord();
  34 }
  35
  36 old_SdrDownCompat::~old_SdrDownCompat()
  37 {
  38     if(bOpen)
  39         CloseSubRecord();
  40 }
  41
  42 void old_SdrDownCompat::Read()
  43 {
  44     rStream >> nSubRecSiz;
  45 }
  46
  47 void old_SdrDownCompat::Write()
  48 {
  49     rStream << nSubRecSiz;
  50 }
  51
  52 void old_SdrDownCompat::OpenSubRecord()
  53 {
  54     if(rStream.GetError())
  55         return;
  56
  57     nSubRecPos = rStream.Tell();
  58
  59     if(nMode == STREAM_READ)
  60     {
  61         Read();
  62     }
  63     else if(nMode == STREAM_WRITE)
  64     {
  65         Write();
  66     }
  67
  68     bOpen = sal_True;
  69 }
  70
  71 void old_SdrDownCompat::CloseSubRecord()
  72 {
  73     if(rStream.GetError())
  74         return;
  75
  76     sal_uInt32 nAktPos(rStream.Tell());
  77
  78     if(nMode == STREAM_READ)
  79     {
  80         sal_uInt32 nReadAnz(nAktPos - nSubRecPos);
  81         if(nReadAnz != nSubRecSiz)
  82         {
  83             rStream.Seek(nSubRecPos + nSubRecSiz);
  84         }
  85     }
  86     else if(nMode == STREAM_WRITE)
  87     {
  88         nSubRecSiz = nAktPos - nSubRecPos;
  89         rStream.Seek(nSubRecPos);
  90         Write();
  91         rStream.Seek(nAktPos);
  92     }
  93
  94     bOpen = sal_False;
  95 }
  96
  97 /*************************************************************************
  98 |*
  99 |* Constructor, writes and reads version number
 100 |*
 101 \************************************************************************/
 102
 103 SdIOCompat::SdIOCompat(SvStream& rNewStream, sal_uInt16 nNewMode, sal_uInt16 nVer)
 104 :   old_SdrDownCompat(rNewStream, nNewMode), nVersion(nVer)
 105 {
 106     if (nNewMode == STREAM_WRITE)
 107     {
 108         DBG_ASSERT(nVer != SDIOCOMPAT_VERSIONDONTKNOW,
 109                    "kann unbekannte Version nicht schreiben");
 110         rNewStream << nVersion;
 111     }
 112     else if (nNewMode == STREAM_READ)
 113     {
 114         DBG_ASSERT(nVer == SDIOCOMPAT_VERSIONDONTKNOW,
 115                    "Lesen mit Angabe der Version ist Quatsch!");
 116         rNewStream >> nVersion;
 117     }
 118 }
 119
 120 SdIOCompat::~SdIOCompat()
 121 {
 122 }
 123
 124 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */