Added the function isFinite(), and replaced the calls to finite() with it.
This was necessary because finite() is not a standard function. Neither can
we use its standard counterpart isfinite(), because it was introduced only
in C99, and therefore it is not supplied by all C++ implementations.
3 * This file is a part of LEMON, a generic C++ optimization library
5 * Copyright (C) 2003-2007
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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.
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
19 #ifndef LEMON_LP_GLPK_H
20 #define LEMON_LP_GLPK_H
23 ///\brief Header of the LEMON-GLPK lp solver interface.
26 #include <lemon/lp_base.h>
34 /// \brief Interface for the GLPK LP solver
36 /// This class implements an interface for the GLPK LP solver.
38 class LpGlpk : virtual public LpSolverBase {
45 typedef LpSolverBase Parent;
48 LpGlpk(const LpGlpk &);
52 virtual LpSolverBase &_newLp();
53 virtual LpSolverBase &_copyLp();
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;
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;
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();
82 ///\todo It should be clarified
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;
91 ///\todo It should be clarified
93 virtual SolutionStatus _getPrimalStatus() const;
94 virtual SolutionStatus _getDualStatus() const;
95 virtual ProblemTypes _getProblemType() const;
97 virtual void _setMax();
98 virtual void _setMin();
100 virtual bool _isMax() const;
103 ///Set the verbosity of the messages
105 ///Set the verbosity of the messages
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
116 ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
118 ///The presolver is off by default.
119 void presolver(bool b);
121 LPX *lpx() {return lp;}
123 } //END OF NAMESPACE LEMON
125 #endif //LEMON_LP_GLPK_H