COIN-OR::LEMON - Graph Library

source: lemon-0.x/src/lemon/lp_glpk.h @ 1431:ad44b1dd8013

Last change on this file since 1431:ad44b1dd8013 was 1431:ad44b1dd8013, checked in by athos, 15 years ago

Added function _setCoeff().

File size: 3.1 KB
Line 
1/* -*- C++ -*-
2 * src/lemon/lp_glpk.h - Part of LEMON, a generic C++ optimization library
3 *
4 * Copyright (C) 2005 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 _setRowCoeffs(int i,
54                               int length,
55                               const int   * indices,
56                               const Value   * values );
57    virtual void _setColCoeffs(int i,
58                               int length,
59                               const int   * indices,
60                               const Value   * values);
61    virtual void _setCoeff(int row, int col, Value value);
62    virtual void _setColLowerBound(int i, Value value);
63    virtual void _setColUpperBound(int i, Value value);
64//     virtual void _setRowLowerBound(int i, Value value);
65//     virtual void _setRowUpperBound(int i, Value value);
66    virtual void _setRowBounds(int i, Value lower, Value upper);
67    virtual void _setObjCoeff(int i, Value obj_coef);
68    virtual void _clearObj();
69//     virtual void _setObj(int length,
70//                          int  const * indices,
71//                          Value  const * values ) = 0;
72
73    ///\e
74   
75    ///\todo It should be clarified
76    ///
77    virtual SolveExitStatus _solve();
78    virtual Value _getPrimal(int i);
79    virtual Value _getPrimalValue();
80    ///\e
81   
82    ///\todo It should be clarified
83    ///
84    virtual SolutionStatus _getPrimalStatus();
85    virtual void _setMax();
86    virtual void _setMin();
87
88  public:
89    ///Set the verbosity of the messages
90
91    ///Set the verbosity of the messages
92    ///
93    ///\param m is the level of the messages output by the solver routines.
94    ///The possible values are:
95    ///- 0 --- no output (default value)
96    ///- 1 --- error messages only
97    ///- 2 --- normal output
98    ///- 3 --- full output (includes informational messages)
99    void messageLevel(int m);
100    ///Turns on or off the presolver
101
102    ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
103    ///
104    ///The presolver is off by default.
105    void presolver(bool b);
106   
107  };
108} //END OF NAMESPACE LEMON
109
110#endif //LEMON_LP_GLPK_H
111
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