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2 * lemon/lp_glpk.h - Part of LEMON, a generic C++ optimization library
4 * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
5 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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.
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
17 #ifndef LEMON_LP_GLPK_H
18 #define LEMON_LP_GLPK_H
21 ///\brief Header of the LEMON-GLPK lp solver interface.
22 ///\ingroup gen_opt_group
24 #include <lemon/lp_base.h>
32 /// \brief Interface for the GLPK LP solver
34 /// This class implements an interface for the GLPK LP solver.
35 ///\ingroup gen_opt_group
36 class LpGlpk : public LpSolverBase {
42 typedef LpSolverBase Parent;
48 virtual LpSolverBase &_newLp();
49 virtual LpSolverBase &_copyLp();
51 virtual int _addCol();
52 virtual int _addRow();
53 virtual void _eraseCol(int i);
54 virtual void _eraseRow(int i);
56 virtual void _setRowCoeffs(int i,
59 const Value * values );
60 virtual void _setColCoeffs(int i,
63 const Value * values);
64 virtual void _setCoeff(int row, int col, Value value);
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 void _clearObj();
72 // virtual void _setObj(int length,
73 // int const * indices,
74 // Value const * values ) = 0;
78 ///\todo It should be clarified
80 virtual SolveExitStatus _solve();
81 virtual Value _getPrimal(int i);
82 virtual Value _getPrimalValue();
85 ///\todo It should be clarified
87 virtual SolutionStatus _getPrimalStatus();
88 virtual SolutionStatus _getDualStatus();
89 virtual ProblemTypes _getProblemType();
91 virtual void _setMax();
92 virtual void _setMin();
95 ///Set the verbosity of the messages
97 ///Set the verbosity of the messages
99 ///\param m is the level of the messages output by the solver routines.
100 ///The possible values are:
101 ///- 0 --- no output (default value)
102 ///- 1 --- error messages only
103 ///- 2 --- normal output
104 ///- 3 --- full output (includes informational messages)
105 void messageLevel(int m);
106 ///Turns on or off the presolver
108 ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
110 ///The presolver is off by default.
111 void presolver(bool b);
114 } //END OF NAMESPACE LEMON
116 #endif //LEMON_LP_GLPK_H