/* -*- 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) 2005 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 <set>
#include "WP5PrefixData.h"
#include "WP5GeneralPacketIndex.h"
#include "WP5SpecialHeaderIndex.h"
#include "libwpd_internal.h"
WP5PrefixData::WP5PrefixData(librevenge::RVNGInputStream *input, WPXEncryption *encryption) :
m_generalPacketData()
{
std::vector<WP5GeneralPacketIndex> prefixIndexVector;
std::set<long> readBlocks; // guard against a cycle in the block list
int id = 0;
while (true)
{
readBlocks.insert(input->tell());
WP5SpecialHeaderIndex shi = WP5SpecialHeaderIndex(input, encryption);
if ((shi.getType() != 0xfffb) || (shi.getNumOfIndexes() != 5) || (shi.getIndexBlockSize() != 50))
{
WPD_DEBUG_MSG(("WordPerfect: detected possible prefix data corruption, ignoring this and all following packets.\n"));
break;
}
bool tmpFoundPossibleCorruption = false;
for (int i=0; i<(shi.getNumOfIndexes()-1); i++)
{
WP5GeneralPacketIndex gpi = WP5GeneralPacketIndex(input, encryption, id);
if ((gpi.getType() > 0x02ff) && (gpi.getType() < 0xfffb))
{
WPD_DEBUG_MSG(("WordPerfect: detected possible prefix data corruption, ignoring this and all following packets.\n"));
tmpFoundPossibleCorruption = true;
break;
}
if ((gpi.getType() != 0) && (gpi.getType() != 0xffff))
{
WPD_DEBUG_MSG(("WordPerfect: constructing general packet index 0x%x\n", id));
prefixIndexVector.push_back(gpi);
id++;
}
}
if (tmpFoundPossibleCorruption)
break;
if (readBlocks.find(long(shi.getNextBlockOffset())) != readBlocks.end())
{
WPD_DEBUG_MSG(("WordPerfect: detected a cycle in the special header index list\n"));
break;
}
if (shi.getNextBlockOffset() != 0)
input->seek(shi.getNextBlockOffset(), librevenge::RVNG_SEEK_SET);
else
break;
}
std::vector<WP5GeneralPacketIndex>::iterator gpiIter;
for (gpiIter = prefixIndexVector.begin(); gpiIter != prefixIndexVector.end(); ++gpiIter)
{
WPD_DEBUG_MSG(("WordPerfect: constructing general packet data %i\n", (*gpiIter).getID()));
WP5GeneralPacketData *generalPacketData = WP5GeneralPacketData::constructGeneralPacketData(input, encryption, &(*gpiIter));
if (generalPacketData)
{
m_generalPacketData[gpiIter->getType()] = generalPacketData;
}
}
}
WP5PrefixData::~WP5PrefixData()
{
std::map<int, WP5GeneralPacketData *>::const_iterator Iter;
for (Iter = m_generalPacketData.begin(); Iter != m_generalPacketData.end(); ++Iter)
delete (Iter->second);
}
const WP5GeneralPacketData *WP5PrefixData::getGeneralPacketData(const int type) const
{
std::map<int, WP5GeneralPacketData *>::const_iterator Iter = m_generalPacketData.find(type);
if (Iter != m_generalPacketData.end())
return static_cast<const WP5GeneralPacketData *>(Iter->second);
else
return nullptr;
}
/* vim:set shiftwidth=4 softtabstop=4 noexpandtab: */