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Viewing changes to src/lib/WP3VariableLengthGroup.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Rene Engelhard
  • Date: 2006-07-15 11:58:12 UTC
  • mfrom: (1.1.5 upstream)
  • Revision ID: james.westby@ubuntu.com-20060715115812-v18efmdayby4clau
Tags: 0.8.6-1
* New upstream release
* swap maintainer/uploader

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src/lib/WP3VariableLengthGroup.cpp
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/* libwpd
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 * Copyright (C) 2004 Marc Maurer (uwog@uwog.net)
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 * Copyright (C) 2004-2005 Fridrich Strba (fridrich.strba@bluewin.ch)
 
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 * Copyright (C) 2004-2006 Fridrich Strba (fridrich.strba@bluewin.ch)
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 *  
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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        }
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}
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bool WP3VariableLengthGroup::isGroupConsistent(WPXInputStream *input, const uint8_t group)
 
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{
 
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        uint32_t startPosition = input->tell();
 
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        try
 
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        {
 
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                uint8_t subGroup = readU8(input);
 
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                uint16_t size = readU16(input, true);
 
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                if (input->seek((startPosition + size - 1 - input->tell()), WPX_SEEK_CUR) || input->atEOS())
 
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                {
 
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                        input->seek(startPosition, WPX_SEEK_SET);
 
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                        return false;
 
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                }
 
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                if (size != readU16(input, true))
 
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                {
 
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                        input->seek(startPosition, WPX_SEEK_SET);
 
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                        return false;
 
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                }
 
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                if (subGroup != readU8(input))
 
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                {
 
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                        input->seek(startPosition, WPX_SEEK_SET);
 
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                        return false;
 
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                }
 
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                if (group != readU8(input))
 
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                {
 
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                        input->seek(startPosition, WPX_SEEK_SET);
 
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                        return false;
 
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                }
 
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                input->seek(startPosition, WPX_SEEK_SET);
 
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                return true;
 
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        }
 
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        catch(...)
 
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        {
 
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                input->seek(startPosition, WPX_SEEK_SET);
 
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                return false;
 
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        }
 
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}
 
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void WP3VariableLengthGroup::_read(WPXInputStream *input)
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{
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        uint32_t startPosition = input->tell();
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        _readContents(input);
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        input->seek((startPosition + m_size - 5 - input->tell()), WPX_SEEK_CUR);
 
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        if (m_size != (readU16(input, true) + 4))
 
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        {
 
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                WPD_DEBUG_MSG(("WordPerfect: Possible corruption detected. Bailing out!\n"));
 
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                throw FileException();
 
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        }
 
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        if (m_subGroup != readU8(input))
 
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        {
 
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                WPD_DEBUG_MSG(("WordPerfect: Possible corruption detected. Bailing out!\n"));
 
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                throw FileException();
 
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        }
 
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        input->seek((startPosition + m_size - 1 - input->tell()), WPX_SEEK_CUR);
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}