/*=============================================================================
 * parser for CSP instances represented in XML format
 * 
 * Copyright (c) 2008 <NAME> (olivier.roussel <at> cril.univ-artois.fr)
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *=============================================================================
 */
#ifndef _CostRepresentation_h_
#define _CostRepresentation_h_

#include <limits>

namespace CSPXMLParser {
using namespace std;

class DefaultCostRepresentation {
public:
    // type which holds a cost
    typedef int Cost;

    static void assignInfinity(Cost& c)
    {
        c = numeric_limits<Cost>::max(); // max. value
    }

    static bool isInfinity(const Cost& c)
    {
        return c == numeric_limits<Cost>::max();
    }
};

class AltCostRepresentation {
public:
    // type which holds a cost
    typedef int Cost;

    static void assignInfinity(Cost& c)
    {
        c = -1; // conventional value
    }

    static bool isInfinity(const Cost& c)
    {
        return c < 0;
    }
};

} // namespace
#endif
