COIN-OR::LEMON - Graph Library

source: lemon/lemon/clp.h @ 924:c67e235c832f

Last change on this file since 924:c67e235c832f was 623:745e182d0139, checked in by Balazs Dezso <deba@…>, 11 years ago

Unified message handling for LP and MIP solvers (#9)

File size: 4.4 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_CLP_H
20#define LEMON_CLP_H
21
22///\file
23///\brief Header of the LEMON-CLP lp solver interface.
24
25#include <vector>
26#include <string>
27
28#include <lemon/lp_base.h>
29
30class ClpSimplex;
31
32namespace lemon {
33
34  /// \ingroup lp_group
35  ///
36  /// \brief Interface for the CLP solver
37  ///
38  /// This class implements an interface for the Clp LP solver.  The
39  /// Clp library is an object oriented lp solver library developed at
40  /// the IBM. The CLP is part of the COIN-OR package and it can be
41  /// used with Common Public License.
42  class ClpLp : public LpSolver {
43  protected:
44
45    ClpSimplex* _prob;
46
47    std::map<std::string, int> _col_names_ref;
48    std::map<std::string, int> _row_names_ref;
49
50  public:
51
52    /// \e
53    ClpLp();
54    /// \e
55    ClpLp(const ClpLp&);
56    /// \e
57    ~ClpLp();
58
59    /// \e
60    virtual ClpLp* newSolver() const;
61    /// \e
62    virtual ClpLp* cloneSolver() const;
63
64  protected:
65
66    mutable double* _primal_ray;
67    mutable double* _dual_ray;
68
69    void _init_temporals();
70    void _clear_temporals();
71
72  protected:
73
74    virtual const char* _solverName() const;
75
76    virtual int _addCol();
77    virtual int _addRow();
78
79    virtual void _eraseCol(int i);
80    virtual void _eraseRow(int i);
81
82    virtual void _eraseColId(int i);
83    virtual void _eraseRowId(int i);
84
85    virtual void _getColName(int col, std::string& name) const;
86    virtual void _setColName(int col, const std::string& name);
87    virtual int _colByName(const std::string& name) const;
88
89    virtual void _getRowName(int row, std::string& name) const;
90    virtual void _setRowName(int row, const std::string& name);
91    virtual int _rowByName(const std::string& name) const;
92
93    virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e);
94    virtual void _getRowCoeffs(int i, InsertIterator b) const;
95
96    virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e);
97    virtual void _getColCoeffs(int i, InsertIterator b) const;
98
99    virtual void _setCoeff(int row, int col, Value value);
100    virtual Value _getCoeff(int row, int col) const;
101
102    virtual void _setColLowerBound(int i, Value value);
103    virtual Value _getColLowerBound(int i) const;
104    virtual void _setColUpperBound(int i, Value value);
105    virtual Value _getColUpperBound(int i) const;
106
107    virtual void _setRowLowerBound(int i, Value value);
108    virtual Value _getRowLowerBound(int i) const;
109    virtual void _setRowUpperBound(int i, Value value);
110    virtual Value _getRowUpperBound(int i) const;
111
112    virtual void _setObjCoeffs(ExprIterator, ExprIterator);
113    virtual void _getObjCoeffs(InsertIterator) const;
114
115    virtual void _setObjCoeff(int i, Value obj_coef);
116    virtual Value _getObjCoeff(int i) const;
117
118    virtual void _setSense(Sense sense);
119    virtual Sense _getSense() const;
120
121    virtual SolveExitStatus _solve();
122
123    virtual Value _getPrimal(int i) const;
124    virtual Value _getDual(int i) const;
125
126    virtual Value _getPrimalValue() const;
127
128    virtual Value _getPrimalRay(int i) const;
129    virtual Value _getDualRay(int i) const;
130
131    virtual VarStatus _getColStatus(int i) const;
132    virtual VarStatus _getRowStatus(int i) const;
133
134    virtual ProblemType _getPrimalType() const;
135    virtual ProblemType _getDualType() const;
136
137    virtual void _clear();
138
139    virtual void _messageLevel(MessageLevel);
140   
141  public:
142
143    ///Solves LP with primal simplex method.
144    SolveExitStatus solvePrimal();
145
146    ///Solves LP with dual simplex method.
147    SolveExitStatus solveDual();
148
149    ///Solves LP with barrier method.
150    SolveExitStatus solveBarrier();
151
152    ///Returns the constraint identifier understood by CLP.
153    int clpRow(Row r) const { return rows(id(r)); }
154
155    ///Returns the variable identifier understood by CLP.
156    int clpCol(Col c) const { return cols(id(c)); }
157
158  };
159
160} //END OF NAMESPACE LEMON
161
162#endif //LEMON_CLP_H
163
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