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