sc/source/core/tool/rechead.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 "rechead.hxx"
  21 #include "scerrors.hxx"
  22
  23 #include <osl/diagnose.h>
  24
  25 // STATIC DATA
  26
  27 ScMultipleReadHeader::ScMultipleReadHeader(SvStream& rNewStream) :
  28     rStream( rNewStream )
  29 {
  30     sal_uInt32 nDataSize;
  31     rStream.ReadUInt32( nDataSize );
  32     sal_uLong nDataPos = rStream.Tell();
  33     nTotalEnd = nDataPos + nDataSize;
  34     nEntryEnd = nTotalEnd;
  35
  36     rStream.SeekRel(nDataSize);
  37     sal_uInt16 nID;
  38     rStream.ReadUInt16( nID );
  39     if (nID != SCID_SIZES)
  40     {
  41         OSL_FAIL("SCID_SIZES not found");
  42         if ( rStream.GetError() == SVSTREAM_OK )
  43             rStream.SetError( SVSTREAM_FILEFORMAT_ERROR );
  44
  45         //  everything to 0, so  BytesLeft() aborts at least
  46         pBuf = NULL; pMemStream = NULL;
  47         nEntryEnd = nDataPos;
  48     }
  49     else
  50     {
  51         sal_uInt32 nSizeTableLen;
  52         rStream.ReadUInt32( nSizeTableLen );
  53         pBuf = new sal_uInt8[nSizeTableLen];
  54         rStream.Read( pBuf, nSizeTableLen );
  55         pMemStream = new SvMemoryStream( pBuf, nSizeTableLen, StreamMode::READ );
  56     }
  57
  58     nEndPos = rStream.Tell();
  59     rStream.Seek( nDataPos );
  60 }
  61
  62 ScMultipleReadHeader::~ScMultipleReadHeader()
  63 {
  64     if ( pMemStream && pMemStream->Tell() != pMemStream->GetEndOfData() )
  65     {
  66         OSL_FAIL( "Sizes not fully read" );
  67         if ( rStream.GetError() == SVSTREAM_OK )
  68             rStream.SetError( SCWARN_IMPORT_INFOLOST );
  69     }
  70     delete pMemStream;
  71     delete[] pBuf;
  72
  73     rStream.Seek(nEndPos);
  74 }
  75
  76 void ScMultipleReadHeader::EndEntry()
  77 {
  78     sal_uLong nPos = rStream.Tell();
  79     OSL_ENSURE( nPos <= nEntryEnd, "read too much" );
  80     if ( nPos != nEntryEnd )
  81     {
  82         if ( rStream.GetError() == SVSTREAM_OK )
  83             rStream.SetError( SCWARN_IMPORT_INFOLOST );
  84         rStream.Seek( nEntryEnd );          // ignore the rest
  85     }
  86
  87     nEntryEnd = nTotalEnd;          // all remaining, if no StartEntry follows
  88 }
  89
  90 void ScMultipleReadHeader::StartEntry()
  91 {
  92     sal_uLong nPos = rStream.Tell();
  93     sal_uInt32 nEntrySize;
  94     (*pMemStream).ReadUInt32( nEntrySize );
  95
  96     nEntryEnd = nPos + nEntrySize;
  97     OSL_ENSURE( nEntryEnd <= nTotalEnd, "read too many entries" );
  98 }
  99
 100 sal_uLong ScMultipleReadHeader::BytesLeft() const
 101 {
 102     sal_uLong nReadEnd = rStream.Tell();
 103     if (nReadEnd <= nEntryEnd)
 104         return nEntryEnd-nReadEnd;
 105
 106     OSL_FAIL("ScMultipleReadHeader::BytesLeft: Error");
 107     return 0;
 108 }
 109
 110 ScMultipleWriteHeader::ScMultipleWriteHeader(SvStream& rNewStream, sal_uInt32 nDefault) :
 111     rStream( rNewStream ),
 112     aMemStream( 4096, 4096 )
 113 {
 114     nDataSize = nDefault;
 115     rStream.WriteUInt32( nDataSize );
 116
 117     nDataPos = rStream.Tell();
 118     nEntryStart = nDataPos;
 119 }
 120
 121 ScMultipleWriteHeader::~ScMultipleWriteHeader()
 122 {
 123     sal_uLong nDataEnd = rStream.Tell();
 124
 125     rStream.WriteUInt16( SCID_SIZES );
 126     rStream.WriteUInt32( aMemStream.Tell() );
 127     rStream.Write( aMemStream.GetData(), aMemStream.Tell() );
 128
 129     if ( nDataEnd - nDataPos != nDataSize )                 // matched default ?
 130     {
 131         nDataSize = nDataEnd - nDataPos;
 132         sal_uLong nPos = rStream.Tell();
 133         rStream.Seek(nDataPos-sizeof(sal_uInt32));
 134         rStream.WriteUInt32( nDataSize );                               // record size at the beginning
 135         rStream.Seek(nPos);
 136     }
 137 }
 138
 139 void ScMultipleWriteHeader::EndEntry()
 140 {
 141     sal_uLong nPos = rStream.Tell();
 142     aMemStream.WriteUInt32( nPos - nEntryStart );
 143 }
 144
 145 void ScMultipleWriteHeader::StartEntry()
 146 {
 147     sal_uLong nPos = rStream.Tell();
 148     nEntryStart = nPos;
 149 }
 150
 151 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */