COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/lp_skeleton.h @ 1875:98698b69a902

Last change on this file since 1875:98698b69a902 was 1875:98698b69a902, checked in by Alpar Juttner, 14 years ago

Happy new year to LEMON

File size: 3.9 KB
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1/* -*- C++ -*-
2 * lemon/lp_skeleton.h - Part of LEMON, a generic C++ optimization library
3 *
4 * Copyright (C) 2006 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
5 * (Egervary Research Group on Combinatorial Optimization, EGRES).
6 *
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.
10 *
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
13 * purpose.
14 *
15 */
16
17#ifndef LEMON_LP_SKELETON
18#define LEMON_LP_SKELETON
19
20#include <lemon/lp_base.h>
21
22///\file
23///\brief A skeleton file to implement LP solver interfaces
24namespace lemon {
25
26  ///A skeleton class to implement LP solver interfaces
27  class LpSkeleton :public LpSolverBase {
28    int col_num,row_num;
29   
30  protected:
31    ///\e
32    virtual LpSolverBase &_newLp();
33    ///\e
34    virtual LpSolverBase &_copyLp();
35    /// \e
36    virtual int _addCol();
37    /// \e
38    virtual int _addRow();
39    /// \e
40    virtual void _eraseCol(int i);
41    /// \e
42    virtual void _eraseRow(int i);
43    /// \e
44
45    /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)
46    ///
47    virtual void _setRowCoeffs(int i,
48                               int length,
49                               int  const * indices,
50                               Value  const * values );
51    /// \e
52
53    /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)
54    ///
55    virtual void _setColCoeffs(int i,
56                               int length,
57                               int  const * indices,
58                               Value  const * values );
59   
60    /// Set one element of the coefficient matrix
61    virtual void _setCoeff(int row, int col, Value value);
62
63    /// The lower bound of a variable (column) have to be given by an
64    /// extended number of type Value, i.e. a finite number of type
65    /// Value or -\ref INF.
66    virtual void _setColLowerBound(int i, Value value);
67    /// \e
68
69    /// The upper bound of a variable (column) have to be given by an
70    /// extended number of type Value, i.e. a finite number of type
71    /// Value or \ref INF.
72    virtual void _setColUpperBound(int i, Value value);
73    /// \e
74
75//     /// The lower bound of a linear expression (row) have to be given by an
76//     /// extended number of type Value, i.e. a finite number of type
77//     /// Value or -\ref INF.
78//     virtual void _setRowLowerBound(int i, Value value);
79//     /// \e
80
81//     /// The upper bound of a linear expression (row) have to be given by an
82//     /// extended number of type Value, i.e. a finite number of type
83//     /// Value or \ref INF.
84//     virtual void _setRowUpperBound(int i, Value value);
85
86    /// The lower and upper bound of a linear expression (row) have to be
87    /// given by an
88    /// extended number of type Value, i.e. a finite number of type
89    /// Value or +/-\ref INF.
90    virtual void _setRowBounds(int i, Value lb, Value ub);
91    /// \e
92
93
94    /// \e
95    virtual void _clearObj();
96    /// \e
97    virtual void _setObjCoeff(int i, Value obj_coef);
98
99    ///\e
100   
101    ///\bug Wrong interface
102    ///
103    virtual SolveExitStatus _solve();
104
105    ///\e
106
107    ///\bug Wrong interface
108    ///
109    virtual Value _getPrimal(int i);
110
111    ///\e
112
113    ///\bug Wrong interface
114    ///
115    virtual Value _getDual(int i);
116
117    ///\e
118
119    ///\bug Wrong interface
120    ///
121    virtual Value _getPrimalValue();
122
123    ///\e
124
125    ///\bug Wrong interface
126    ///
127    virtual SolutionStatus _getPrimalStatus();
128
129    ////e
130    virtual SolutionStatus _getDualStatus();
131
132
133    ///\e
134    virtual ProblemTypes _getProblemType();
135
136    ///\e
137    virtual void _setMax();
138    ///\e
139    virtual void _setMin();
140
141    ///\e
142    virtual bool _isBasicCol(int i);
143
144   
145
146  public:
147    LpSkeleton() : LpSolverBase(), col_num(0), row_num(0) {}
148  }; 
149
150} //namespace lemon
151
152#endif // LEMON_LP_SKELETON
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