qcross/libqnono/cnonogram.cpp

/***************************************************************************
 *   Copyright (C) 2008 by Oliver Groß                                     *
 *   z.o.gross@gmx.de                                                      *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include "cnonogram.h"
#include <QImage>
#include <QDataStream>

namespace libqnono {
	static const quint64 CNonogram_MAGIC = Q_UINT64_C(0x35a8bca32006c5a9);
	
	CNonogram::CNonogram() {
	}
	
	CNonogram::CNonogram(const NonogramProblem & problem)
	: m_problem(problem), m_marker(problem.size()) {
	}
	
	bool CNonogram::readFromStream(QDataStream & stream) {
		quint64 magic;
		stream >> magic;
		if (CNonogram_MAGIC != magic || QDataStream::Ok != stream.status()) {
			if (QDataStream::ReadPastEnd != stream.status()) stream.setStatus(QDataStream::ReadCorruptData);
			return false;
		}
		
		NonogramProblem problem;
		NonogramMarker marker;
		
		if (!problem.readFromStream(stream)) return false;
		if (!marker.readFromStream(stream)) return false;
		
		if (problem.size() != marker.size()) {
			stream.setStatus(QDataStream::ReadCorruptData);
			return false;
		}
		
		m_problem = problem;
		m_marker = marker;
		
		return true;
	}
	
	void CNonogram::writeToStream(QDataStream & stream) const {
		stream << CNonogram_MAGIC << m_problem << m_marker;
	}
	
	QDataStream & operator<<(QDataStream& stream, const libqnono::CNonogram& nonogram) {
		nonogram.writeToStream(stream);
		return stream;
	}
	
	QDataStream & operator>>(QDataStream & stream, CNonogram & nonogram) {
		nonogram.readFromStream(stream);
		return stream;
	}
}