COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/lp_glpk.h @ 2324:18fc834761d9

Last change on this file since 2324:18fc834761d9 was 2324:18fc834761d9, checked in by athos, 14 years ago

Some query functions got implemented, but only for GLPK.

File size: 3.4 KB
Line 
1/* -*- C++ -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library
4 *
5 * Copyright (C) 2003-2006
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 gen_opt_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 gen_opt_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);
59    virtual void _setColName(int col, const std::string & name);
60    virtual void _setRowCoeffs(int i, LpRowIterator b, LpRowIterator e);
61    virtual void _setColCoeffs(int i, LpColIterator b, LpColIterator e);
62    virtual void _setCoeff(int row, int col, Value value);
63    virtual Value _getCoeff(int row, int col);
64
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 Value _getObjCoeff(int i);
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    virtual bool _isMax();
98
99  public:
100    ///Set the verbosity of the messages
101
102    ///Set the verbosity of the messages
103    ///
104    ///\param m is the level of the messages output by the solver routines.
105    ///The possible values are:
106    ///- 0 --- no output (default value)
107    ///- 1 --- error messages only
108    ///- 2 --- normal output
109    ///- 3 --- full output (includes informational messages)
110    void messageLevel(int m);
111    ///Turns on or off the presolver
112
113    ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
114    ///
115    ///The presolver is off by default.
116    void presolver(bool b);
117
118    LPX *lpx() {return lp;}
119  };
120} //END OF NAMESPACE LEMON
121
122#endif //LEMON_LP_GLPK_H
123
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