COIN-OR::LEMON - Graph Library

source: lemon-1.2/lemon/glpk.h @ 764:1fac515a59c1

Last change on this file since 764:1fac515a59c1 was 650:a8dfe89b7719, checked in by Balazs Dezso <deba@…>, 11 years ago

Fix glp_prob definition (#286)

File size: 5.8 KB
Line 
1/* -*- mode: C++; indent-tabs-mode: nil; -*-
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_GLPK_H
20#define LEMON_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>
27
28// forward declaration
29#if !defined _GLP_PROB && !defined GLP_PROB
30#define _GLP_PROB
31#define GLP_PROB
32typedef struct { double _opaque_prob; } glp_prob;
33/* LP/MIP problem object */
34#endif
35
36namespace lemon {
37
38
39  /// \brief Base interface for the GLPK LP and MIP solver
40  ///
41  /// This class implements the common interface of the GLPK LP and MIP solver.
42  /// \ingroup lp_group
43  class GlpkBase : virtual public LpBase {
44  protected:
45
46    typedef glp_prob LPX;
47    glp_prob* lp;
48
49    GlpkBase();
50    GlpkBase(const GlpkBase&);
51    virtual ~GlpkBase();
52
53  protected:
54
55    virtual int _addCol();
56    virtual int _addRow();
57
58    virtual void _eraseCol(int i);
59    virtual void _eraseRow(int i);
60
61    virtual void _eraseColId(int i);
62    virtual void _eraseRowId(int i);
63
64    virtual void _getColName(int col, std::string& name) const;
65    virtual void _setColName(int col, const std::string& name);
66    virtual int _colByName(const std::string& name) const;
67
68    virtual void _getRowName(int row, std::string& name) const;
69    virtual void _setRowName(int row, const std::string& name);
70    virtual int _rowByName(const std::string& name) const;
71
72    virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e);
73    virtual void _getRowCoeffs(int i, InsertIterator b) const;
74
75    virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e);
76    virtual void _getColCoeffs(int i, InsertIterator b) const;
77
78    virtual void _setCoeff(int row, int col, Value value);
79    virtual Value _getCoeff(int row, int col) const;
80
81    virtual void _setColLowerBound(int i, Value value);
82    virtual Value _getColLowerBound(int i) const;
83
84    virtual void _setColUpperBound(int i, Value value);
85    virtual Value _getColUpperBound(int i) const;
86
87    virtual void _setRowLowerBound(int i, Value value);
88    virtual Value _getRowLowerBound(int i) const;
89
90    virtual void _setRowUpperBound(int i, Value value);
91    virtual Value _getRowUpperBound(int i) const;
92
93    virtual void _setObjCoeffs(ExprIterator b, ExprIterator e);
94    virtual void _getObjCoeffs(InsertIterator b) const;
95
96    virtual void _setObjCoeff(int i, Value obj_coef);
97    virtual Value _getObjCoeff(int i) const;
98
99    virtual void _setSense(Sense);
100    virtual Sense _getSense() const;
101
102    virtual void _clear();
103
104    virtual void _messageLevel(MessageLevel level);
105
106  private:
107
108    static void freeEnv();
109
110    struct FreeEnvHelper {
111      ~FreeEnvHelper() {
112        freeEnv();
113      }
114    };
115   
116    static FreeEnvHelper freeEnvHelper;
117
118  protected:
119   
120    int _message_level;
121   
122  public:
123
124    ///Pointer to the underlying GLPK data structure.
125    LPX *lpx() {return lp;}
126    ///Const pointer to the underlying GLPK data structure.
127    const LPX *lpx() const {return lp;}
128
129    ///Returns the constraint identifier understood by GLPK.
130    int lpxRow(Row r) const { return rows(id(r)); }
131
132    ///Returns the variable identifier understood by GLPK.
133    int lpxCol(Col c) const { return cols(id(c)); }
134
135  };
136
137  /// \brief Interface for the GLPK LP solver
138  ///
139  /// This class implements an interface for the GLPK LP solver.
140  ///\ingroup lp_group
141  class GlpkLp : public LpSolver, public GlpkBase {
142  public:
143
144    ///\e
145    GlpkLp();
146    ///\e
147    GlpkLp(const GlpkLp&);
148
149    ///\e
150    virtual GlpkLp* cloneSolver() const;
151    ///\e
152    virtual GlpkLp* newSolver() const;
153
154  private:
155
156    mutable std::vector<double> _primal_ray;
157    mutable std::vector<double> _dual_ray;
158
159    void _clear_temporals();
160
161  protected:
162
163    virtual const char* _solverName() const;
164
165    virtual SolveExitStatus _solve();
166    virtual Value _getPrimal(int i) const;
167    virtual Value _getDual(int i) const;
168
169    virtual Value _getPrimalValue() const;
170
171    virtual VarStatus _getColStatus(int i) const;
172    virtual VarStatus _getRowStatus(int i) const;
173
174    virtual Value _getPrimalRay(int i) const;
175    virtual Value _getDualRay(int i) const;
176
177    virtual ProblemType _getPrimalType() const;
178    virtual ProblemType _getDualType() const;
179
180  public:
181
182    ///Solve with primal simplex
183    SolveExitStatus solvePrimal();
184
185    ///Solve with dual simplex
186    SolveExitStatus solveDual();
187
188  private:
189
190    bool _presolve;
191
192  public:
193
194    ///Turns on or off the presolver
195
196    ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
197    ///
198    ///The presolver is off by default.
199    void presolver(bool presolve);
200
201  };
202
203  /// \brief Interface for the GLPK MIP solver
204  ///
205  /// This class implements an interface for the GLPK MIP solver.
206  ///\ingroup lp_group
207  class GlpkMip : public MipSolver, public GlpkBase {
208  public:
209
210    ///\e
211    GlpkMip();
212    ///\e
213    GlpkMip(const GlpkMip&);
214
215    virtual GlpkMip* cloneSolver() const;
216    virtual GlpkMip* newSolver() const;
217
218  protected:
219
220    virtual const char* _solverName() const;
221
222    virtual ColTypes _getColType(int col) const;
223    virtual void _setColType(int col, ColTypes col_type);
224
225    virtual SolveExitStatus _solve();
226    virtual ProblemType _getType() const;
227    virtual Value _getSol(int i) const;
228    virtual Value _getSolValue() const;
229
230  };
231
232
233} //END OF NAMESPACE LEMON
234
235#endif //LEMON_GLPK_H
236
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