COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/lp_glpk.h @ 2553:bfced05fa852

Last change on this file since 2553:bfced05fa852 was 2553:bfced05fa852, checked in by Alpar Juttner, 12 years ago

Happy New Year to LEMON (+ better update-copyright-header script)

File size: 3.6 KB
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1/* -*- C++ -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library
4 *
5 * Copyright (C) 2003-2008
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 lp_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 lp_group
38  class LpGlpk : virtual public LpSolverBase {
39  protected:
40    LPX* lp;
41    bool solved;
42   
43  public:
44   
45    typedef LpSolverBase Parent;
46   
47    LpGlpk();
48    LpGlpk(const LpGlpk &);
49    ~LpGlpk();
50   
51  protected:
52    virtual LpSolverBase &_newLp();
53    virtual LpSolverBase &_copyLp();
54
55    virtual int _addCol();
56    virtual int _addRow();
57    virtual void _eraseCol(int i);
58    virtual void _eraseRow(int i);
59    virtual void _getColName(int col, std::string & name) const;
60    virtual void _setColName(int col, const std::string & name);
61    virtual int _colByName(const std::string& name) const;
62    virtual void _setRowCoeffs(int i, ConstRowIterator b, ConstRowIterator e);
63    virtual void _getRowCoeffs(int i, RowIterator b) const;
64    virtual void _setColCoeffs(int i, ConstColIterator b, ConstColIterator e);
65    virtual void _getColCoeffs(int i, ColIterator b) const;
66    virtual void _setCoeff(int row, int col, Value value);
67    virtual Value _getCoeff(int row, int col) const;
68
69    virtual void _setColLowerBound(int i, Value value);
70    virtual Value _getColLowerBound(int i) const;
71    virtual void _setColUpperBound(int i, Value value);
72    virtual Value _getColUpperBound(int i) const;
73
74    virtual void _setRowBounds(int i, Value lower, Value upper);
75    virtual void _getRowBounds(int i, Value &lb, Value &ub) const;
76    virtual void _setObjCoeff(int i, Value obj_coef);
77    virtual Value _getObjCoeff(int i) const;
78    virtual void _clearObj();
79
80    ///\e
81   
82    ///\todo It should be clarified
83    ///
84    virtual SolveExitStatus _solve();
85    virtual Value _getPrimal(int i) const;
86    virtual Value _getDual(int i) const;
87    virtual Value _getPrimalValue() const;
88    virtual bool _isBasicCol(int i) const;
89    ///\e
90   
91    ///\todo It should be clarified
92    ///
93    virtual SolutionStatus _getPrimalStatus() const;
94    virtual SolutionStatus _getDualStatus() const;
95    virtual ProblemTypes _getProblemType() const;
96
97    virtual void _setMax();
98    virtual void _setMin();
99
100    virtual bool _isMax() const;
101
102  public:
103    ///Set the verbosity of the messages
104
105    ///Set the verbosity of the messages
106    ///
107    ///\param m is the level of the messages output by the solver routines.
108    ///The possible values are:
109    ///- 0 --- no output (default value)
110    ///- 1 --- error messages only
111    ///- 2 --- normal output
112    ///- 3 --- full output (includes informational messages)
113    void messageLevel(int m);
114    ///Turns on or off the presolver
115
116    ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
117    ///
118    ///The presolver is off by default.
119    void presolver(bool b);
120
121    LPX *lpx() {return lp;}
122  };
123} //END OF NAMESPACE LEMON
124
125#endif //LEMON_LP_GLPK_H
126
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