path: root/src/utils/bool_translator.hpp

/*
 * UltraStar Deluxe - Karaoke Game
 *
 * UltraStar Deluxe is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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; see the file COPYING. If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef BOOL_TRANSLATOR_HPP
#define BOOL_TRANSLATOR_HPP

#include <boost/algorithm/string/predicate.hpp>

namespace usdx
{
	struct BoolTranslator
	{
		typedef std::string internal_type;
		typedef bool external_type;

		boost::optional<external_type> get_value(const internal_type& str)
		{
			if (!str.empty())
			{
				if (boost::algorithm::iequals(str, "true")
					|| boost::algorithm::iequals(str, "yes")
					|| str == "1")
					return boost::optional<external_type>(true);
				else
					return boost::optional<external_type>(false);
			}
			else
				return boost::optional<external_type>(boost::none);
		}

		boost::optional<internal_type> put_value(const external_type& b)
		{
			return boost::optional<internal_type>(b ? "true" : "false");
		}
	};
};

namespace boost {
	namespace property_tree {

		template<typename Ch, typename Traits, typename Alloc>
		struct translator_between<std::basic_string< Ch, Traits, Alloc >, bool>
		{
			typedef usdx::BoolTranslator type;
		};

	};
};

#endif