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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* libwpd
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* Version: MPL 2.0 / LGPLv2.1+
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Major Contributor(s):
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* Copyright (C) 2004 Marc Maurer (uwog@uwog.net)
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* Copyright (C) 2006 Fridrich Strba (fridrich.strba@bluewin.ch)
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*
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* For minor contributions see the git repository.
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*
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* Alternatively, the contents of this file may be used under the terms
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* of the GNU Lesser General Public License Version 2.1 or later
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* (LGPLv2.1+), in which case the provisions of the LGPLv2.1+ are
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* applicable instead of those above.
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*
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* For further information visit http://libwpd.sourceforge.net
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*/
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/* "This product is not manufactured, approved, or supported by
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* Corel Corporation or Corel Corporation Limited."
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*/
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#include "WP3FixedLengthGroup.h"
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#include "WP3FileStructure.h"
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#include "WP3AttributeGroup.h"
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#include "WP3UnsupportedFixedLengthGroup.h"
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#include "WP3ExtendedCharacterGroup.h"
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#include "WP3DoubleByteScriptCharacterGroup.h"
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#include "WP3TabGroup.h"
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#include "WP3IndentGroup.h"
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#include "WP3UndoGroup.h"
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#include "libwpd_internal.h"
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WP3FixedLengthGroup::WP3FixedLengthGroup(const unsigned char groupID)
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: m_group(groupID)
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{
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}
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WP3FixedLengthGroup *WP3FixedLengthGroup::constructFixedLengthGroup(librevenge::RVNGInputStream *input, WPXEncryption *encryption, const unsigned char groupID)
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{
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switch (groupID)
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{
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case WP3_EXTENDED_CHARACTER_GROUP:
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return new WP3ExtendedCharacterGroup(input, encryption, groupID);
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case WP3_TAB_GROUP:
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return new WP3TabGroup(input, encryption, groupID);
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case WP3_INDENT_GROUP:
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return new WP3IndentGroup(input, encryption, groupID);
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case WP3_UNDO_GROUP:
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return new WP3UndoGroup(input, encryption, groupID);
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case WP3_ATTRIBUTE_GROUP:
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return new WP3AttributeGroup(input, encryption, groupID);
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case WP3_DOUBLE_BYTE_SCRIPT_CHARACTER_GROUP:
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return new WP3DoubleByteScriptCharacterGroup(input, encryption, groupID);
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// Add the remaining cases here
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default:
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return new WP3UnsupportedFixedLengthGroup(input, encryption, groupID);
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}
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}
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bool WP3FixedLengthGroup::isGroupConsistent(librevenge::RVNGInputStream *input, WPXEncryption *encryption, const unsigned char groupID)
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{
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long startPosition = input->tell();
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try
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{
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int size = WP3_FIXED_LENGTH_FUNCTION_GROUP_SIZE[groupID-0xC0];
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if (input->seek((startPosition + size - 2), librevenge::RVNG_SEEK_SET) || input->isEnd())
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{
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input->seek(startPosition, librevenge::RVNG_SEEK_SET);
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return false;
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}
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if (groupID != readU8(input, encryption))
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{
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input->seek(startPosition, librevenge::RVNG_SEEK_SET);
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return false;
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}
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input->seek(startPosition, librevenge::RVNG_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, librevenge::RVNG_SEEK_SET);
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return false;
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}
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}
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void WP3FixedLengthGroup::_read(librevenge::RVNGInputStream *input, WPXEncryption *encryption)
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{
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long startPosition = input->tell();
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_readContents(input, encryption);
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if (m_group >= 0xC0 && m_group <= 0xCF) // just an extra safety check
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{
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int size = WP3_FIXED_LENGTH_FUNCTION_GROUP_SIZE[m_group-0xC0];
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input->seek((startPosition + size - 2), librevenge::RVNG_SEEK_SET);
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if (m_group != readU8(input, encryption))
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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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}
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else
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throw FileException();
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}
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/* vim:set shiftwidth=4 softtabstop=4 noexpandtab: */
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