/* -*- C++ -*-

 * src/lemon/lp_glpk.h - Part of LEMON, a generic C++ optimization library

 *

 * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Combinatorial Optimization Research Group, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#ifndef LEMON_LP_GLPK_H

#define LEMON_LP_GLPK_H

///\file

///\brief Header of the LEMON-GLPK lp solver interface.

#include "lp_base.h"

extern "C" {

#include "glpk.h"

}

namespace lemon {

  /// \brief Wrapper for GLPK solver

  /// 

  /// This class implements a lemon wrapper for GLPK.

  class LpGlpk : public LpSolverBase {

  public:

    typedef LpSolverBase Parent;

    /// \e

    LPX* lp;

    /// \e

    LpGlpk() : Parent(), 

			lp(lpx_create_prob()) {

      lpx_set_int_parm(lp, LPX_K_DUAL, 1);

    }

    /// \e

    ~LpGlpk() {

      lpx_delete_prob(lp);

    }

  protected:

    virtual int _addCol();

    virtual int _addRow();

    virtual void _setRowCoeffs(int i, 

			       int length,

                               const int   * indices, 

                               const Value   * values );

    virtual void _setColCoeffs(int i, 

			       int length,

                               const int   * indices, 

                               const Value   * values);

    virtual void _setColLowerBound(int i, Value value);

    virtual void _setColUpperBound(int i, Value value);

    virtual void _setRowLowerBound(int i, Value value);

    virtual void _setRowUpperBound(int i, Value value);

    virtual void _setObjCoeff(int i, Value obj_coef);

    ///\e

    ///\bug Unimplemented

    ///

    virtual SolutionType _solve();

    ///\e

    ///\bug Unimplemented

    ///

    virtual Value _getSolution(int i);

  };

} //END OF NAMESPACE LEMON

#endif //LEMON_LP_GLPK_H