/* -*- 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 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 "WP5Part.h"
#include "WP5VariableLengthGroup.h"
#include "WP5FixedLengthGroup.h"
#include "WP5SingleByteFunction.h"
#include "WP5Listener.h"
// constructPart: constructs a parseable low-level representation of part of the document
// returns the part if it successfully creates the part, returns 0 if it can't
// throws an exception if there is an error
// precondition: readVal is between 0xC0 and 0xFF
WP5Part *WP5Part::constructPart(librevenge::RVNGInputStream *input, WPXEncryption *encryption, const unsigned char readVal)
{
WPD_DEBUG_MSG(("WordPerfect: ConstructPart\n"));
if (readVal >= (unsigned char)0x80 && readVal <= (unsigned char)0xBF)
{
// single-byte function
WPD_DEBUG_MSG(("WordPerfect: constructSingleByteFunction(input, val)\n"));
return WP5SingleByteFunction::constructSingleByteFunction(input, encryption, readVal);
}
else if (readVal >= (unsigned char)0xC0 && readVal <= (unsigned char)0xCF)
{
// fixed length multi-byte function
if (!WP5FixedLengthGroup::isGroupConsistent(input, encryption, readVal))
{
WPD_DEBUG_MSG(("WordPerfect: Consistency Check (fixed length) failed; ignoring this byte\n"));
return nullptr;
}
WPD_DEBUG_MSG(("WordPerfect: constructFixedLengthGroup(input, val)\n"));
return WP5FixedLengthGroup::constructFixedLengthGroup(input, encryption, readVal);
}
else if (readVal >= (unsigned char)0xD0)
{
// variable length multi-byte function
/* check whether the function is consistent with the variable length
* function definition. If not, just skip the function byte and try next position.
* The documentation speaks about variable length functions from 0xD0 to 0xFF, but
* only 0xD0 to 0xDF, 0xE1 and 0xFE are documented. We saw in some documents that
* the 0xE8 function was a single byte undocumented function (or corruption???) */
if (!WP5VariableLengthGroup::isGroupConsistent(input, encryption, readVal))
{
WPD_DEBUG_MSG(("WordPerfect: Consistency Check (variable length) failed; ignoring this byte\n"));
return nullptr;
}
WPD_DEBUG_MSG(("WordPerfect: constructVariableLengthGroup(input, val)\n"));
return WP5VariableLengthGroup::constructVariableLengthGroup(input, encryption, readVal);
}
WPD_DEBUG_MSG(("WordPerfect: Returning 0 from constructPart\n"));
return nullptr;
}
/* vim:set shiftwidth=4 softtabstop=4 noexpandtab: */