COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/lp_glpk.h @ 2429:fd51b552bcf2

Last change on this file since 2429:fd51b552bcf2 was 2391:14a343be7a5a, checked in by Alpar Juttner, 17 years ago

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1/* -*- C++ -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library
4 *
5 * Copyright (C) 2003-2007
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
8 *
9 * Permission to use, modify and distribute this software is granted
10 * provided that this copyright notice appears in all copies. For
11 * precise terms see the accompanying LICENSE file.
12 *
13 * This software is provided "AS IS" with no warranty of any kind,
14 * express or implied, and with no claim as to its suitability for any
15 * purpose.
16 *
17 */
18
19#ifndef LEMON_LP_GLPK_H
20#define LEMON_LP_GLPK_H
21
22///\file
23///\brief Header of the LEMON-GLPK lp solver interface.
24///\ingroup lp_group
25
26#include <lemon/lp_base.h>
27extern "C" {
28#include <glpk.h>
29}
30
31namespace lemon {
32
33
34  /// \brief Interface for the GLPK LP solver
35  ///
36  /// This class implements an interface for the GLPK LP solver.
37  ///\ingroup lp_group
38  class LpGlpk : virtual public LpSolverBase {
39  protected:
40    LPX* lp;
41   
42  public:
43   
44    typedef LpSolverBase Parent;
45   
46    LpGlpk();
47    LpGlpk(const LpGlpk &);
48    ~LpGlpk();
49   
50  protected:
51    virtual LpSolverBase &_newLp();
52    virtual LpSolverBase &_copyLp();
53
54    virtual int _addCol();
55    virtual int _addRow();
56    virtual void _eraseCol(int i);
57    virtual void _eraseRow(int i);
58    virtual void _getColName(int col, std::string & name) const;
59    virtual void _setColName(int col, const std::string & name);
60    virtual int _colByName(const std::string& name) const;
61    virtual void _setRowCoeffs(int i, ConstRowIterator b, ConstRowIterator e);
62    virtual void _getRowCoeffs(int i, RowIterator b) const;
63    virtual void _setColCoeffs(int i, ConstColIterator b, ConstColIterator e);
64    virtual void _getColCoeffs(int i, ColIterator b) const;
65    virtual void _setCoeff(int row, int col, Value value);
66    virtual Value _getCoeff(int row, int col) const;
67
68    virtual void _setColLowerBound(int i, Value value);
69    virtual Value _getColLowerBound(int i) const;
70    virtual void _setColUpperBound(int i, Value value);
71    virtual Value _getColUpperBound(int i) const;
72
73    virtual void _setRowBounds(int i, Value lower, Value upper);
74    virtual void _getRowBounds(int i, Value &lb, Value &ub) const;
75    virtual void _setObjCoeff(int i, Value obj_coef);
76    virtual Value _getObjCoeff(int i) const;
77    virtual void _clearObj();
78
79    ///\e
80   
81    ///\todo It should be clarified
82    ///
83    virtual SolveExitStatus _solve();
84    virtual Value _getPrimal(int i) const;
85    virtual Value _getDual(int i) const;
86    virtual Value _getPrimalValue() const;
87    virtual bool _isBasicCol(int i) const;
88    ///\e
89   
90    ///\todo It should be clarified
91    ///
92    virtual SolutionStatus _getPrimalStatus() const;
93    virtual SolutionStatus _getDualStatus() const;
94    virtual ProblemTypes _getProblemType() const;
95
96    virtual void _setMax();
97    virtual void _setMin();
98
99    virtual bool _isMax() const;
100
101  public:
102    ///Set the verbosity of the messages
103
104    ///Set the verbosity of the messages
105    ///
106    ///\param m is the level of the messages output by the solver routines.
107    ///The possible values are:
108    ///- 0 --- no output (default value)
109    ///- 1 --- error messages only
110    ///- 2 --- normal output
111    ///- 3 --- full output (includes informational messages)
112    void messageLevel(int m);
113    ///Turns on or off the presolver
114
115    ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
116    ///
117    ///The presolver is off by default.
118    void presolver(bool b);
119
120    LPX *lpx() {return lp;}
121  };
122} //END OF NAMESPACE LEMON
123
124#endif //LEMON_LP_GLPK_H
125
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