COIN-OR::LEMON - Graph Library

source: lemon-0.x/src/lemon/lp_glpk.h @ 1326:85f1c483279e

Last change on this file since 1326:85f1c483279e was 1326:85f1c483279e, checked in by Alpar Juttner, 16 years ago

Add presolver() to turn on/off the GLPK presolver

File size: 2.7 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 Combinatorial Optimization Research Group, 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
23#include "lp_base.h"
24extern "C" {
25#include <glpk.h>
26}
27
28namespace lemon {
29
30
31  /// \brief Wrapper for GLPK solver
32  ///
33  /// This class implements a lemon wrapper for GLPK.
34  class LpGlpk : public LpSolverBase {
35  protected:
36    LPX* lp;
37   
38  public:
39   
40    typedef LpSolverBase Parent;
41   
42    LpGlpk();
43    ~LpGlpk();
44   
45  protected:
46    virtual int _addCol();
47    virtual int _addRow();
48    virtual void _setRowCoeffs(int i,
49                               int length,
50                               const int   * indices,
51                               const Value   * values );
52    virtual void _setColCoeffs(int i,
53                               int length,
54                               const int   * indices,
55                               const Value   * values);
56    virtual void _setColLowerBound(int i, Value value);
57    virtual void _setColUpperBound(int i, Value value);
58    virtual void _setRowLowerBound(int i, Value value);
59    virtual void _setRowUpperBound(int i, Value value);
60    virtual void _setObjCoeff(int i, Value obj_coef);
61    ///\e
62   
63    ///\todo It should be clarified
64    ///
65    virtual SolveExitStatus _solve();
66    virtual Value _getPrimal(int i);
67    virtual Value _getPrimalValue();
68    ///\e
69   
70    ///\todo It should be clarified
71    ///
72    virtual SolutionStatus _getPrimalStatus();
73    virtual void _setMax();
74    virtual void _setMin();
75
76  public:
77    ///Set the verbosity of the messages
78
79    ///Set the verbosity of the messages
80    ///
81    ///\param m is the level of the messages output by the solver routines.
82    ///The possible values are:
83    ///- 0 --- no output (default value)
84    ///- 1 --- error messages only
85    ///- 2 --- normal output
86    ///- 3 --- full output (includes informational messages)
87    void messageLevel(int m);
88    ///Turns on or off the presolver
89
90    ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
91    ///
92    ///The presolver is off by default.
93    void presolver(bool b);
94   
95  };
96} //END OF NAMESPACE LEMON
97
98#endif //LEMON_LP_GLPK_H
99
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