COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/lp_glpk.h @ 1933:a876a3d6a4c7

Last change on this file since 1933:a876a3d6a4c7 was 1895:5b01801efbc0, checked in by Alpar Juttner, 14 years ago
  • colName() added (untested on CPLEX)
  • possibility to set lower/upper bounds of several cols at once
  • setObj() -> obj()
  • setRow() -> row()
File size: 3.5 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    virtual void _getColName(int col,       std::string & name);
56    virtual void _setColName(int col, const std::string & name);
57    virtual void _setRowCoeffs(int i,
58                               int length,
59                               const int   * indices,
60                               const Value   * values );
61    virtual void _setColCoeffs(int i,
62                               int length,
63                               const int   * indices,
64                               const Value   * values);
65    virtual void _setCoeff(int row, int col, Value value);
66    virtual void _setColLowerBound(int i, Value value);
67    virtual void _setColUpperBound(int i, Value value);
68//     virtual void _setRowLowerBound(int i, Value value);
69//     virtual void _setRowUpperBound(int i, Value value);
70    virtual void _setRowBounds(int i, Value lower, Value upper);
71    virtual void _setObjCoeff(int i, Value obj_coef);
72    virtual void _clearObj();
73//     virtual void _setObj(int length,
74//                          int  const * indices,
75//                          Value  const * values ) = 0;
76
77    ///\e
78   
79    ///\todo It should be clarified
80    ///
81    virtual SolveExitStatus _solve();
82    virtual Value _getPrimal(int i);
83    virtual Value _getDual(int i);
84    virtual Value _getPrimalValue();
85    virtual bool _isBasicCol(int i);
86    ///\e
87   
88    ///\todo It should be clarified
89    ///
90    virtual SolutionStatus _getPrimalStatus();
91    virtual SolutionStatus _getDualStatus();
92    virtual ProblemTypes _getProblemType();
93
94    virtual void _setMax();
95    virtual void _setMin();
96
97  public:
98    ///Set the verbosity of the messages
99
100    ///Set the verbosity of the messages
101    ///
102    ///\param m is the level of the messages output by the solver routines.
103    ///The possible values are:
104    ///- 0 --- no output (default value)
105    ///- 1 --- error messages only
106    ///- 2 --- normal output
107    ///- 3 --- full output (includes informational messages)
108    void messageLevel(int m);
109    ///Turns on or off the presolver
110
111    ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
112    ///
113    ///The presolver is off by default.
114    void presolver(bool b);
115   
116  };
117} //END OF NAMESPACE LEMON
118
119#endif //LEMON_LP_GLPK_H
120
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