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 old_SdrDownCompat::old_SdrDownCompat(SvStream& rNewStream, StreamMode nNewMode)
  25 :   rStream(rNewStream),
  26     nSubRecSiz(0),
  27     nSubRecPos(0),
  28     nMode(nNewMode),
  29     bOpen(false)
  30 {
  31     OpenSubRecord();
  32 }
  33
  34 old_SdrDownCompat::~old_SdrDownCompat()
  35 {
  36     if(bOpen)
  37         CloseSubRecord();
  38 }
  39
  40 void old_SdrDownCompat::Write()
  41 {
  42     rStream.WriteUInt32( nSubRecSiz );
  43 }
  44
  45 void old_SdrDownCompat::OpenSubRecord()
  46 {
  47     if(rStream.GetError())
  48         return;
  49
  50     nSubRecPos = rStream.Tell();
  51
  52     if(nMode == StreamMode::READ)
  53     {
  54         rStream.ReadUInt32( nSubRecSiz );
  55     }
  56     else if(nMode == StreamMode::WRITE)
  57     {
  58         Write();
  59     }
  60
  61     bOpen = true;
  62 }
  63
  64 void old_SdrDownCompat::CloseSubRecord()
  65 {
  66     if(rStream.GetError())
  67         return;
  68
  69     sal_uInt32 nCurrentPos(rStream.Tell());
  70
  71     if(nMode == StreamMode::READ)
  72     {
  73         sal_uInt32 nReadCnt(nCurrentPos - nSubRecPos);
  74         if(nReadCnt != nSubRecSiz)
  75         {
  76             rStream.Seek(nSubRecPos + nSubRecSiz);
  77         }
  78     }
  79     else if(nMode == StreamMode::WRITE)
  80     {
  81         nSubRecSiz = nCurrentPos - nSubRecPos;
  82         rStream.Seek(nSubRecPos);
  83         Write();
  84         rStream.Seek(nCurrentPos);
  85     }
  86
  87     bOpen = false;
  88 }
  89
  90 /*************************************************************************
  91 |*
  92 |* Constructor, writes and reads version number
  93 |*
  94 \************************************************************************/
  95
  96 SdIOCompat::SdIOCompat(SvStream& rNewStream, StreamMode nNewMode, sal_uInt16 nVersion)
  97 :   old_SdrDownCompat(rNewStream, nNewMode)
  98 {
  99     if (nNewMode == StreamMode::WRITE)
 100     {
 101         DBG_ASSERT(nVersion != SDIOCOMPAT_VERSIONDONTKNOW,
 102                    "can't write unknown version");
 103         rNewStream.WriteUInt16( nVersion );
 104     }
 105     else if (nNewMode == StreamMode::READ)
 106     {
 107         DBG_ASSERT(nVersion == SDIOCOMPAT_VERSIONDONTKNOW,
 108                    "referring to the version while reading is silly!");
 109         rNewStream.ReadUInt16( nVersion );
 110     }
 111 }
 112
 113 SdIOCompat::~SdIOCompat()
 114 {
 115 }
 116
 117 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */