COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/lp_glpk.h @ 1882:2c3f6c7e01b4

Last change on this file since 1882:2c3f6c7e01b4 was 1875:98698b69a902, checked in by Alpar Juttner, 14 years ago

Happy new year to LEMON

File size: 3.3 KB
Line 
1/* -*- C++ -*-
2 * lemon/lp_glpk.h - Part of LEMON, a generic C++ optimization library
3 *
4 * Copyright (C) 2006 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
5 * (Egervary Research Group on Combinatorial Optimization, EGRES).
6 *
7 * Permission to use, modify and distribute this software is granted
8 * provided that this copyright notice appears in all copies. For
9 * precise terms see the accompanying LICENSE file.
10 *
11 * This software is provided "AS IS" with no warranty of any kind,
12 * express or implied, and with no claim as to its suitability for any
13 * purpose.
14 *
15 */
16
17#ifndef LEMON_LP_GLPK_H
18#define LEMON_LP_GLPK_H
19
20///\file
21///\brief Header of the LEMON-GLPK lp solver interface.
22///\ingroup gen_opt_group
23
24#include <lemon/lp_base.h>
25extern "C" {
26#include <glpk.h>
27}
28
29namespace lemon {
30
31
32  /// \brief Interface for the GLPK LP solver
33  ///
34  /// This class implements an interface for the GLPK LP solver.
35  ///\ingroup gen_opt_group
36  class LpGlpk : public LpSolverBase {
37  protected:
38    LPX* lp;
39   
40  public:
41   
42    typedef LpSolverBase Parent;
43   
44    LpGlpk();
45    ~LpGlpk();
46   
47  protected:
48    virtual LpSolverBase &_newLp();
49    virtual LpSolverBase &_copyLp();
50
51    virtual int _addCol();
52    virtual int _addRow();
53    virtual void _eraseCol(int i);
54    virtual void _eraseRow(int i);
55
56    virtual void _setRowCoeffs(int i,
57                               int length,
58                               const int   * indices,
59                               const Value   * values );
60    virtual void _setColCoeffs(int i,
61                               int length,
62                               const int   * indices,
63                               const Value   * values);
64    virtual void _setCoeff(int row, int col, Value value);
65    virtual void _setColLowerBound(int i, Value value);
66    virtual void _setColUpperBound(int i, Value value);
67//     virtual void _setRowLowerBound(int i, Value value);
68//     virtual void _setRowUpperBound(int i, Value value);
69    virtual void _setRowBounds(int i, Value lower, Value upper);
70    virtual void _setObjCoeff(int i, Value obj_coef);
71    virtual void _clearObj();
72//     virtual void _setObj(int length,
73//                          int  const * indices,
74//                          Value  const * values ) = 0;
75
76    ///\e
77   
78    ///\todo It should be clarified
79    ///
80    virtual SolveExitStatus _solve();
81    virtual Value _getPrimal(int i);
82    virtual Value _getDual(int i);
83    virtual Value _getPrimalValue();
84    virtual bool _isBasicCol(int i);
85    ///\e
86   
87    ///\todo It should be clarified
88    ///
89    virtual SolutionStatus _getPrimalStatus();
90    virtual SolutionStatus _getDualStatus();
91    virtual ProblemTypes _getProblemType();
92
93    virtual void _setMax();
94    virtual void _setMin();
95
96  public:
97    ///Set the verbosity of the messages
98
99    ///Set the verbosity of the messages
100    ///
101    ///\param m is the level of the messages output by the solver routines.
102    ///The possible values are:
103    ///- 0 --- no output (default value)
104    ///- 1 --- error messages only
105    ///- 2 --- normal output
106    ///- 3 --- full output (includes informational messages)
107    void messageLevel(int m);
108    ///Turns on or off the presolver
109
110    ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
111    ///
112    ///The presolver is off by default.
113    void presolver(bool b);
114   
115  };
116} //END OF NAMESPACE LEMON
117
118#endif //LEMON_LP_GLPK_H
119
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