/* -*- 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) 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 "WP3FixedLengthGroup.h"
#include "WP3FileStructure.h"
#include "WP3AttributeGroup.h"
#include "WP3UnsupportedFixedLengthGroup.h"
#include "WP3ExtendedCharacterGroup.h"
#include "WP3DoubleByteScriptCharacterGroup.h"
#include "WP3TabGroup.h"
#include "WP3IndentGroup.h"
#include "WP3UndoGroup.h"
#include "libwpd_internal.h"
WP3FixedLengthGroup::WP3FixedLengthGroup(const unsigned char groupID)
: m_group(groupID)
{
}
WP3FixedLengthGroup *WP3FixedLengthGroup::constructFixedLengthGroup(librevenge::RVNGInputStream *input, WPXEncryption *encryption, const unsigned char groupID)
{
switch (groupID)
{
case WP3_EXTENDED_CHARACTER_GROUP:
return new WP3ExtendedCharacterGroup(input, encryption, groupID);
case WP3_TAB_GROUP:
return new WP3TabGroup(input, encryption, groupID);
case WP3_INDENT_GROUP:
return new WP3IndentGroup(input, encryption, groupID);
case WP3_UNDO_GROUP:
return new WP3UndoGroup(input, encryption, groupID);
case WP3_ATTRIBUTE_GROUP:
return new WP3AttributeGroup(input, encryption, groupID);
case WP3_DOUBLE_BYTE_SCRIPT_CHARACTER_GROUP:
return new WP3DoubleByteScriptCharacterGroup(input, encryption, groupID);
// Add the remaining cases here
default:
return new WP3UnsupportedFixedLengthGroup(input, encryption, groupID);
}
}
bool WP3FixedLengthGroup::isGroupConsistent(librevenge::RVNGInputStream *input, WPXEncryption *encryption, const unsigned char groupID)
{
long startPosition = input->tell();
try
{
int size = WP3_FIXED_LENGTH_FUNCTION_GROUP_SIZE[groupID-0xC0];
if (input->seek((startPosition + size - 2), librevenge::RVNG_SEEK_SET) || input->isEnd())
{
input->seek(startPosition, librevenge::RVNG_SEEK_SET);
return false;
}
if (groupID != 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 WP3FixedLengthGroup::_read(librevenge::RVNGInputStream *input, WPXEncryption *encryption)
{
long startPosition = input->tell();
_readContents(input, encryption);
if (m_group >= 0xC0 && m_group <= 0xCF) // just an extra safety check
{
int size = WP3_FIXED_LENGTH_FUNCTION_GROUP_SIZE[m_group-0xC0];
input->seek((startPosition + size - 2), librevenge::RVNG_SEEK_SET);
if (m_group != readU8(input, encryption))
{
WPD_DEBUG_MSG(("WordPerfect: Possible corruption detected. Bailing out!\n"));
throw FileException();
}
}
else
throw FileException();
}
/* vim:set shiftwidth=4 softtabstop=4 noexpandtab: */