COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/lp_skeleton.h @ 2116:b6a68c15a6a3

Last change on this file since 2116:b6a68c15a6a3 was 1956:a055123339d5, checked in by Alpar Juttner, 14 years ago

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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_SKELETON
20#define LEMON_LP_SKELETON
21
22#include <lemon/lp_base.h>
23
24///\file
25///\brief A skeleton file to implement LP solver interfaces
26namespace lemon {
27
28  ///A skeleton class to implement LP solver interfaces
29  class LpSkeleton :public LpSolverBase {
30    int col_num,row_num;
31   
32  protected:
33    ///\e
34    virtual LpSolverBase &_newLp();
35    ///\e
36    virtual LpSolverBase &_copyLp();
37    /// \e
38    virtual int _addCol();
39    /// \e
40    virtual int _addRow();
41    /// \e
42    virtual void _eraseCol(int i);
43    /// \e
44    virtual void _eraseRow(int i);
45    /// \e
46    virtual void _getColName(int col,       std::string & name);
47    /// \e
48    virtual void _setColName(int col, const std::string & name);
49
50    /// \e
51
52    /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)
53    ///
54    virtual void _setRowCoeffs(int i,
55                               int length,
56                               int  const * indices,
57                               Value  const * values );
58    /// \e
59
60    /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)
61    ///
62    virtual void _setColCoeffs(int i,
63                               int length,
64                               int  const * indices,
65                               Value  const * values );
66   
67    /// Set one element of the coefficient matrix
68    virtual void _setCoeff(int row, int col, Value value);
69
70    /// The lower bound of a variable (column) have to be given by an
71    /// extended number of type Value, i.e. a finite number of type
72    /// Value or -\ref INF.
73    virtual void _setColLowerBound(int i, Value value);
74    /// \e
75
76    /// The upper bound of a variable (column) have to be given by an
77    /// extended number of type Value, i.e. a finite number of type
78    /// Value or \ref INF.
79    virtual void _setColUpperBound(int i, Value value);
80    /// \e
81
82//     /// The lower bound of a linear expression (row) have to be given by an
83//     /// extended number of type Value, i.e. a finite number of type
84//     /// Value or -\ref INF.
85//     virtual void _setRowLowerBound(int i, Value value);
86//     /// \e
87
88//     /// The upper bound of a linear expression (row) have to be given by an
89//     /// extended number of type Value, i.e. a finite number of type
90//     /// Value or \ref INF.
91//     virtual void _setRowUpperBound(int i, Value value);
92
93    /// The lower and upper bound of a linear expression (row) have to be
94    /// given by an
95    /// extended number of type Value, i.e. a finite number of type
96    /// Value or +/-\ref INF.
97    virtual void _setRowBounds(int i, Value lb, Value ub);
98    /// \e
99
100
101    /// \e
102    virtual void _clearObj();
103    /// \e
104    virtual void _setObjCoeff(int i, Value obj_coef);
105
106    ///\e
107   
108    ///\bug Wrong interface
109    ///
110    virtual SolveExitStatus _solve();
111
112    ///\e
113
114    ///\bug Wrong interface
115    ///
116    virtual Value _getPrimal(int i);
117
118    ///\e
119
120    ///\bug Wrong interface
121    ///
122    virtual Value _getDual(int i);
123
124    ///\e
125
126    ///\bug Wrong interface
127    ///
128    virtual Value _getPrimalValue();
129
130    ///\e
131
132    ///\bug Wrong interface
133    ///
134    virtual SolutionStatus _getPrimalStatus();
135
136    ////e
137    virtual SolutionStatus _getDualStatus();
138
139
140    ///\e
141    virtual ProblemTypes _getProblemType();
142
143    ///\e
144    virtual void _setMax();
145    ///\e
146    virtual void _setMin();
147
148    ///\e
149    virtual bool _isBasicCol(int i);
150
151   
152
153  public:
154    LpSkeleton() : LpSolverBase(), col_num(0), row_num(0) {}
155  }; 
156
157} //namespace lemon
158
159#endif // LEMON_LP_SKELETON
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