RhodeCode

/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2008

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, 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_GLPK_H

#define LEMON_GLPK_H

///\file

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

///\ingroup lp_group

#include <lemon/lp_base.h>

// forward declaration

#define _GLP_PROB

/* LP/MIP problem object */

#endif

namespace lemon {

  /// \brief Base interface for the GLPK LP and MIP solver

  ///

  /// This class implements the common interface of the GLPK LP and MIP solver.

  /// \ingroup lp_group

  class GlpkBase : virtual public LpBase {

  protected:

    typedef glp_prob LPX;

    glp_prob* lp;

    GlpkBase();

    GlpkBase(const GlpkBase&);

    virtual ~GlpkBase();

  protected:

    virtual int _addCol();

    virtual int _addRow();

    virtual void _eraseCol(int i);

    virtual void _eraseRow(int i);

    virtual void _eraseColId(int i);

    virtual void _eraseRowId(int i);

    virtual void _getColName(int col, std::string& name) const;

    virtual void _setColName(int col, const std::string& name);

    virtual int _colByName(const std::string& name) const;

    virtual void _getRowName(int row, std::string& name) const;

    virtual void _setRowName(int row, const std::string& name);

    virtual int _rowByName(const std::string& name) const;

    virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e);

    virtual void _getRowCoeffs(int i, InsertIterator b) const;

    virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e);

    virtual void _getColCoeffs(int i, InsertIterator b) const;

    virtual void _setCoeff(int row, int col, Value value);

    virtual Value _getCoeff(int row, int col) const;

    virtual void _setColLowerBound(int i, Value value);

    virtual Value _getColLowerBound(int i) const;

    virtual void _setColUpperBound(int i, Value value);

    virtual Value _getColUpperBound(int i) const;

    virtual void _setRowLowerBound(int i, Value value);

    virtual Value _getRowLowerBound(int i) const;

    virtual void _setRowUpperBound(int i, Value value);

    virtual Value _getRowUpperBound(int i) const;

    virtual void _setObjCoeffs(ExprIterator b, ExprIterator e);

    virtual void _getObjCoeffs(InsertIterator b) const;

    virtual void _setObjCoeff(int i, Value obj_coef);

    virtual Value _getObjCoeff(int i) const;

    virtual void _setSense(Sense);

    virtual Sense _getSense() const;

    virtual void _clear();

    virtual void _messageLevel(MessageLevel level);

  private:

    static void freeEnv();

    struct FreeEnvHelper {

      ~FreeEnvHelper() {

        freeEnv();

      }

    };

    static FreeEnvHelper freeEnvHelper;

  protected:

    int _message_level;

  public:

    ///Pointer to the underlying GLPK data structure.

    LPX *lpx() {return lp;}

    ///Const pointer to the underlying GLPK data structure.

    const LPX *lpx() const {return lp;}