/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* libwpd
* Version: MPL 2.0 / LGPLv2.1+
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Major Contributor(s):
* Copyright (C) 2003 William Lachance (wrlach@gmail.com)
* Copyright (C) 2003-2004 Marc Maurer (uwog@uwog.net)
* Copyright (C) 2006 Fridrich Strba (fridrich.strba@bluewin.ch)
*
* For minor contributions see the git repository.
*
* Alternatively, the contents of this file may be used under the terms
* of the GNU Lesser General Public License Version 2.1 or later
* (LGPLv2.1+), in which case the provisions of the LGPLv2.1+ are
* applicable instead of those above.
*
* For further information visit http://libwpd.sourceforge.net
*/
/* "This product is not manufactured, approved, or supported by
* Corel Corporation or Corel Corporation Limited."
*/
#include "WP5PageFormatGroup.h"
#include "WP5VariableLengthGroup.h"
#include "WP5UnsupportedVariableLengthGroup.h"
#include "libwpd_internal.h"
#include "WP5HeaderFooterGroup.h"
#include "WP5FontGroup.h"
#include "WP5BoxGroup.h"
#include "WP5FootnoteEndnoteGroup.h"
#include "WP5DefinitionGroup.h"
#include "WP5TableEOLGroup.h"
#include "WP5TableEOPGroup.h"
WP5VariableLengthGroup::WP5VariableLengthGroup() :
m_subGroup(0),
m_size(0)
{
}
WP5VariableLengthGroup *WP5VariableLengthGroup::constructVariableLengthGroup(librevenge::RVNGInputStream *input, WPXEncryption *encryption, const unsigned char group)
{
WPD_DEBUG_MSG(("WordPerfect: handling a variable length group Ox%x\n", group));
switch (group)
{
case WP5_TOP_DEFINITION_GROUP:
return new WP5DefinitionGroup(input, encryption);
case WP5_TOP_PAGE_FORMAT_GROUP:
return new WP5PageFormatGroup(input, encryption);
case WP5_TOP_HEADER_FOOTER_GROUP:
return new WP5HeaderFooterGroup(input, encryption);
case WP5_TOP_FONT_GROUP:
return new WP5FontGroup(input, encryption);
case WP5_TOP_FOOTNOTE_ENDNOTE_GROUP:
return new WP5FootnoteEndnoteGroup(input, encryption);
case WP5_TOP_BOX_GROUP:
return new WP5BoxGroup(input, encryption);
case WP5_TOP_TABLE_EOL_GROUP:
return new WP5TableEOLGroup(input, encryption);
case WP5_TOP_TABLE_EOP_GROUP:
return new WP5TableEOPGroup(input, encryption);
default:
// this is an unhandled group, just skip it
return new WP5UnsupportedVariableLengthGroup(input, encryption);
}
}
bool WP5VariableLengthGroup::isGroupConsistent(librevenge::RVNGInputStream *input, WPXEncryption *encryption, const unsigned char group)
{
long startPosition = input->tell();
try
{
unsigned char subGroup = readU8(input, encryption);
unsigned short size = readU16(input, encryption);
if (input->seek((startPosition + size - 1), librevenge::RVNG_SEEK_SET) || input->isEnd())
{
input->seek(startPosition, librevenge::RVNG_SEEK_SET);
return false;
}
if (size != readU16(input, encryption))
{
input->seek(startPosition, librevenge::RVNG_SEEK_SET);
return false;
}
if (subGroup != readU8(input, encryption))
{
input->seek(startPosition, librevenge::RVNG_SEEK_SET);
return false;
}
if (group != readU8(input, encryption))
{
input->seek(startPosition, librevenge::RVNG_SEEK_SET);
return false;
}
input->seek(startPosition, librevenge::RVNG_SEEK_SET);
return true;
}
catch (...)
{
input->seek(startPosition, librevenge::RVNG_SEEK_SET);
return false;
}
}
void WP5VariableLengthGroup::_read(librevenge::RVNGInputStream *input, WPXEncryption *encryption)
{
long startPosition = input->tell();
m_subGroup = readU8(input, encryption);
m_size = (unsigned short)(readU16(input, encryption) + 4); // the length is the number of data bytes minus 4 (ie. the function codes)
WPD_DEBUG_MSG(("WordPerfect: Read variable group header (start_position: %li, sub_group: 0x%2x, size: %u)\n", startPosition, m_subGroup, m_size));
_readContents(input, encryption);
input->seek((startPosition + m_size - 5), librevenge::RVNG_SEEK_SET);
if (m_size != (readU16(input, encryption) + 4))
{
WPD_DEBUG_MSG(("WordPerfect: Possible corruption detected. Bailing out!\n"));
throw FileException();
}
if (m_subGroup != readU8(input, encryption))
{
WPD_DEBUG_MSG(("WordPerfect: Possible corruption detected. Bailing out!\n"));
throw FileException();
}
input->seek((startPosition + m_size - 1), librevenge::RVNG_SEEK_SET);
}
/* vim:set shiftwidth=4 softtabstop=4 noexpandtab: */