2 * src/lemon/lp_skeleton.h
3 * - Part of LEMON, a generic C++ optimization library
5 * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
6 * (Egervary Research Group on Combinatorial Optimization, EGRES).
8 * Permission to use, modify and distribute this software is granted
9 * provided that this copyright notice appears in all copies. For
10 * precise terms see the accompanying LICENSE file.
12 * This software is provided "AS IS" with no warranty of any kind,
13 * express or implied, and with no claim as to its suitability for any
18 #ifndef LEMON_LP_SKELETON
19 #define LEMON_LP_SKELETON
21 #include <lemon/lp_base.h>
24 ///\brief A skeleton file to implement LP solver interfaces
27 ///A skeleton class to implement LP solver interfaces
28 class LpSkeleton :public LpSolverBase {
33 virtual LpSolverBase &_newLp();
35 virtual LpSolverBase &_copyLp();
37 virtual int _addCol();
39 virtual int _addRow();
41 virtual void _eraseCol(int i);
43 virtual void _eraseRow(int i);
46 /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)
48 virtual void _setRowCoeffs(int i,
51 Value const * values );
54 /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)
56 virtual void _setColCoeffs(int i,
59 Value const * values );
61 /// Set one element of the coefficient matrix
62 virtual void _setCoeff(int row, int col, Value value);
64 /// The lower bound of a variable (column) have to be given by an
65 /// extended number of type Value, i.e. a finite number of type
66 /// Value or -\ref INF.
67 virtual void _setColLowerBound(int i, Value value);
70 /// The upper 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 _setColUpperBound(int i, Value value);
76 // /// The lower bound of a linear expression (row) 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 _setRowLowerBound(int i, Value value);
82 // /// The upper 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 _setRowUpperBound(int i, Value value);
87 /// The lower and upper bound of a linear expression (row) have to be
89 /// extended number of type Value, i.e. a finite number of type
90 /// Value or +/-\ref INF.
91 virtual void _setRowBounds(int i, Value lb, Value ub);
96 virtual void _clearObj();
98 virtual void _setObjCoeff(int i, Value obj_coef);
102 ///\bug Wrong interface
104 virtual SolveExitStatus _solve();
108 ///\bug Wrong interface
110 virtual Value _getPrimal(int i);
113 ///\bug Wrong interface
115 virtual Value _getPrimalValue();
118 ///\bug Wrong interface
120 virtual SolutionStatus _getPrimalStatus();
123 virtual void _setMax();
125 virtual void _setMin();
129 LpSkeleton() : LpSolverBase(), col_num(0), row_num(0) {}
134 #endif // LEMON_LP_SKELETON