athos@1261: /* -*- C++ -*-
athos@1261:  *
alpar@1956:  * This file is a part of LEMON, a generic C++ optimization library
alpar@1956:  *
alpar@2391:  * Copyright (C) 2003-2007
alpar@1956:  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@1359:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
athos@1261:  *
athos@1261:  * Permission to use, modify and distribute this software is granted
athos@1261:  * provided that this copyright notice appears in all copies. For
athos@1261:  * precise terms see the accompanying LICENSE file.
athos@1261:  *
athos@1261:  * This software is provided "AS IS" with no warranty of any kind,
athos@1261:  * express or implied, and with no claim as to its suitability for any
athos@1261:  * purpose.
athos@1261:  *
athos@1261:  */
athos@1261: 
athos@1261: #ifndef LEMON_LP_GLPK_H
athos@1261: #define LEMON_LP_GLPK_H
athos@1261: 
athos@1261: ///\file
athos@1261: ///\brief Header of the LEMON-GLPK lp solver interface.
deba@2370: ///\ingroup lp_group
athos@1261: 
ladanyi@1356: #include <lemon/lp_base.h>
athos@1261: extern "C" {
alpar@1326: #include <glpk.h>
athos@1261: }
athos@1261: 
athos@1261: namespace lemon {
athos@1261: 
athos@1261: 
alpar@1398:   /// \brief Interface for the GLPK LP solver
athos@1261:   /// 
alpar@1398:   /// This class implements an interface for the GLPK LP solver.
deba@2370:   ///\ingroup lp_group
athos@2144:   class LpGlpk : virtual public LpSolverBase {
alpar@1321:   protected:
alpar@1321:     LPX* lp;
alpar@1321:     
athos@1261:   public:
alpar@1321:     
athos@1261:     typedef LpSolverBase Parent;
athos@1261:     
alpar@1321:     LpGlpk();
alpar@2321:     LpGlpk(const LpGlpk &);
alpar@1321:     ~LpGlpk();
alpar@1321:     
athos@1261:   protected:
alpar@1364:     virtual LpSolverBase &_newLp();
alpar@1364:     virtual LpSolverBase &_copyLp();
alpar@1364: 
athos@1261:     virtual int _addCol();
athos@1261:     virtual int _addRow();
athos@1432:     virtual void _eraseCol(int i);
athos@1432:     virtual void _eraseRow(int i);
deba@2366:     virtual void _getColName(int col, std::string & name) const;
alpar@1895:     virtual void _setColName(int col, const std::string & name);
deba@2366:     virtual int _colByName(const std::string& name) const;
deba@2364:     virtual void _setRowCoeffs(int i, ConstRowIterator b, ConstRowIterator e);
deba@2366:     virtual void _getRowCoeffs(int i, RowIterator b) const;
deba@2364:     virtual void _setColCoeffs(int i, ConstColIterator b, ConstColIterator e);
deba@2366:     virtual void _getColCoeffs(int i, ColIterator b) const;
athos@1431:     virtual void _setCoeff(int row, int col, Value value);
deba@2366:     virtual Value _getCoeff(int row, int col) const;
athos@2324: 
athos@1261:     virtual void _setColLowerBound(int i, Value value);
deba@2366:     virtual Value _getColLowerBound(int i) const;
athos@1261:     virtual void _setColUpperBound(int i, Value value);
deba@2366:     virtual Value _getColUpperBound(int i) const;
athos@2328: 
athos@1379:     virtual void _setRowBounds(int i, Value lower, Value upper);
deba@2366:     virtual void _getRowBounds(int i, Value &lb, Value &ub) const;
athos@1261:     virtual void _setObjCoeff(int i, Value obj_coef);
deba@2366:     virtual Value _getObjCoeff(int i) const;
athos@1377:     virtual void _clearObj();
athos@1376: 
alpar@1263:     ///\e
alpar@1263:     
alpar@1321:     ///\todo It should be clarified
alpar@1263:     ///
alpar@1303:     virtual SolveExitStatus _solve();
deba@2366:     virtual Value _getPrimal(int i) const;
deba@2366:     virtual Value _getDual(int i) const;
deba@2366:     virtual Value _getPrimalValue() const;
deba@2366:     virtual bool _isBasicCol(int i) const;
alpar@1312:     ///\e
alpar@1312:     
alpar@1321:     ///\todo It should be clarified
alpar@1312:     ///
deba@2366:     virtual SolutionStatus _getPrimalStatus() const;
deba@2366:     virtual SolutionStatus _getDualStatus() const;
deba@2366:     virtual ProblemTypes _getProblemType() const;
athos@1460: 
alpar@1321:     virtual void _setMax();
alpar@1321:     virtual void _setMin();
athos@1261: 
deba@2366:     virtual bool _isMax() const;
athos@2324: 
alpar@1321:   public:
alpar@1321:     ///Set the verbosity of the messages
alpar@1321: 
alpar@1326:     ///Set the verbosity of the messages
alpar@1326:     ///
alpar@1321:     ///\param m is the level of the messages output by the solver routines.
alpar@1321:     ///The possible values are:
alpar@1321:     ///- 0 --- no output (default value)
alpar@1321:     ///- 1 --- error messages only
alpar@1321:     ///- 2 --- normal output
alpar@1321:     ///- 3 --- full output (includes informational messages)
alpar@1321:     void messageLevel(int m);
alpar@1326:     ///Turns on or off the presolver
alpar@1326: 
alpar@1326:     ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
alpar@1326:     ///
alpar@1326:     ///The presolver is off by default.
alpar@1326:     void presolver(bool b);
alpar@2321: 
alpar@2321:     LPX *lpx() {return lp;}
athos@1261:   };
athos@1261: } //END OF NAMESPACE LEMON
athos@1261: 
athos@1261: #endif //LEMON_LP_GLPK_H
athos@1261: