COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/lp_glpk.h @ 2364:3a5e67bd42d2

Last change on this file since 2364:3a5e67bd42d2 was 2364:3a5e67bd42d2, checked in by Balazs Dezso, 13 years ago

Lp row and col getter function
lp section reader and writer for lemon IO

File size: 3.7 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, ConstRowIterator b, ConstRowIterator e);
61    virtual void _getRowCoeffs(int i, RowIterator b);
62    virtual void _setColCoeffs(int i, ConstColIterator b, ConstColIterator e);
63    virtual void _getColCoeffs(int i, ColIterator b);
64    virtual void _setCoeff(int row, int col, Value value);
65    virtual Value _getCoeff(int row, int col);
66
67    virtual void _setColLowerBound(int i, Value value);
68    virtual Value _getColLowerBound(int i);
69    virtual void _setColUpperBound(int i, Value value);
70    virtual Value _getColUpperBound(int i);
71
72//     virtual void _setRowLowerBound(int i, Value value);
73//     virtual void _setRowUpperBound(int i, Value value);
74    virtual void _setRowBounds(int i, Value lower, Value upper);
75    virtual void _getRowBounds(int i, Value &lb, Value &ub);
76    virtual void _setObjCoeff(int i, Value obj_coef);
77    virtual Value _getObjCoeff(int i);
78    virtual void _clearObj();
79//     virtual void _setObj(int length,
80//                          int  const * indices,
81//                          Value  const * values ) = 0;
82
83    ///\e
84   
85    ///\todo It should be clarified
86    ///
87    virtual SolveExitStatus _solve();
88    virtual Value _getPrimal(int i);
89    virtual Value _getDual(int i);
90    virtual Value _getPrimalValue();
91    virtual bool _isBasicCol(int i);
92    ///\e
93   
94    ///\todo It should be clarified
95    ///
96    virtual SolutionStatus _getPrimalStatus();
97    virtual SolutionStatus _getDualStatus();
98    virtual ProblemTypes _getProblemType();
99
100    virtual void _setMax();
101    virtual void _setMin();
102
103    virtual bool _isMax();
104
105  public:
106    ///Set the verbosity of the messages
107
108    ///Set the verbosity of the messages
109    ///
110    ///\param m is the level of the messages output by the solver routines.
111    ///The possible values are:
112    ///- 0 --- no output (default value)
113    ///- 1 --- error messages only
114    ///- 2 --- normal output
115    ///- 3 --- full output (includes informational messages)
116    void messageLevel(int m);
117    ///Turns on or off the presolver
118
119    ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
120    ///
121    ///The presolver is off by default.
122    void presolver(bool b);
123
124    LPX *lpx() {return lp;}
125  };
126} //END OF NAMESPACE LEMON
127
128#endif //LEMON_LP_GLPK_H
129
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