Line data    Source code

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