[461] | 1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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| 2 | * |
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| 3 | * This file is a part of LEMON, a generic C++ optimization library. |
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| 4 | * |
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| 5 | * Copyright (C) 2003-2008 |
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| 6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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| 7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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| 8 | * |
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| 9 | * Permission to use, modify and distribute this software is granted |
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| 10 | * provided that this copyright notice appears in all copies. For |
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| 11 | * precise terms see the accompanying LICENSE file. |
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| 12 | * |
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| 13 | * This software is provided "AS IS" with no warranty of any kind, |
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| 14 | * express or implied, and with no claim as to its suitability for any |
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| 15 | * purpose. |
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| 16 | * |
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| 17 | */ |
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| 18 | |
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| 19 | #ifndef LEMON_CLP_H |
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| 20 | #define LEMON_CLP_H |
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| 21 | |
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| 22 | ///\file |
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| 23 | ///\brief Header of the LEMON-CLP lp solver interface. |
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| 24 | |
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| 25 | #include <vector> |
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| 26 | #include <string> |
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| 27 | |
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| 28 | #include <lemon/lp_base.h> |
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| 29 | |
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| 30 | class ClpSimplex; |
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| 31 | |
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| 32 | namespace lemon { |
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| 33 | |
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| 34 | /// \ingroup lp_group |
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| 35 | /// |
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| 36 | /// \brief Interface for the CLP solver |
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| 37 | /// |
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| 38 | /// This class implements an interface for the Clp LP solver. The |
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| 39 | /// Clp library is an object oriented lp solver library developed at |
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| 40 | /// the IBM. The CLP is part of the COIN-OR package and it can be |
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| 41 | /// used with Common Public License. |
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[462] | 42 | class ClpLp : public LpSolver { |
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[461] | 43 | protected: |
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| 44 | |
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| 45 | ClpSimplex* _prob; |
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| 46 | |
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| 47 | std::map<std::string, int> _col_names_ref; |
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| 48 | std::map<std::string, int> _row_names_ref; |
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| 49 | |
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| 50 | public: |
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| 51 | |
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| 52 | /// \e |
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[462] | 53 | ClpLp(); |
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[461] | 54 | /// \e |
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[462] | 55 | ClpLp(const ClpLp&); |
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[461] | 56 | /// \e |
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[462] | 57 | ~ClpLp(); |
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[461] | 58 | |
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[540] | 59 | /// \e |
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| 60 | virtual ClpLp* newSolver() const; |
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| 61 | /// \e |
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| 62 | virtual ClpLp* cloneSolver() const; |
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| 63 | |
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[461] | 64 | protected: |
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| 65 | |
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| 66 | mutable double* _primal_ray; |
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| 67 | mutable double* _dual_ray; |
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| 68 | |
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| 69 | void _init_temporals(); |
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| 70 | void _clear_temporals(); |
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| 71 | |
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| 72 | protected: |
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| 73 | |
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| 74 | virtual const char* _solverName() const; |
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| 75 | |
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| 76 | virtual int _addCol(); |
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| 77 | virtual int _addRow(); |
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| 78 | |
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| 79 | virtual void _eraseCol(int i); |
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| 80 | virtual void _eraseRow(int i); |
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| 81 | |
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| 82 | virtual void _eraseColId(int i); |
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| 83 | virtual void _eraseRowId(int i); |
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| 84 | |
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| 85 | virtual void _getColName(int col, std::string& name) const; |
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| 86 | virtual void _setColName(int col, const std::string& name); |
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| 87 | virtual int _colByName(const std::string& name) const; |
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| 88 | |
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| 89 | virtual void _getRowName(int row, std::string& name) const; |
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| 90 | virtual void _setRowName(int row, const std::string& name); |
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| 91 | virtual int _rowByName(const std::string& name) const; |
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| 92 | |
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| 93 | virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e); |
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| 94 | virtual void _getRowCoeffs(int i, InsertIterator b) const; |
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| 95 | |
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| 96 | virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e); |
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| 97 | virtual void _getColCoeffs(int i, InsertIterator b) const; |
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| 98 | |
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| 99 | virtual void _setCoeff(int row, int col, Value value); |
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| 100 | virtual Value _getCoeff(int row, int col) const; |
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| 101 | |
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| 102 | virtual void _setColLowerBound(int i, Value value); |
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| 103 | virtual Value _getColLowerBound(int i) const; |
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| 104 | virtual void _setColUpperBound(int i, Value value); |
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| 105 | virtual Value _getColUpperBound(int i) const; |
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| 106 | |
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| 107 | virtual void _setRowLowerBound(int i, Value value); |
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| 108 | virtual Value _getRowLowerBound(int i) const; |
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| 109 | virtual void _setRowUpperBound(int i, Value value); |
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| 110 | virtual Value _getRowUpperBound(int i) const; |
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| 111 | |
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| 112 | virtual void _setObjCoeffs(ExprIterator, ExprIterator); |
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| 113 | virtual void _getObjCoeffs(InsertIterator) const; |
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| 114 | |
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| 115 | virtual void _setObjCoeff(int i, Value obj_coef); |
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| 116 | virtual Value _getObjCoeff(int i) const; |
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| 117 | |
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| 118 | virtual void _setSense(Sense sense); |
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| 119 | virtual Sense _getSense() const; |
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| 120 | |
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| 121 | virtual SolveExitStatus _solve(); |
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| 122 | |
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| 123 | virtual Value _getPrimal(int i) const; |
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| 124 | virtual Value _getDual(int i) const; |
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| 125 | |
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| 126 | virtual Value _getPrimalValue() const; |
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| 127 | |
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| 128 | virtual Value _getPrimalRay(int i) const; |
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| 129 | virtual Value _getDualRay(int i) const; |
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| 130 | |
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| 131 | virtual VarStatus _getColStatus(int i) const; |
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| 132 | virtual VarStatus _getRowStatus(int i) const; |
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| 133 | |
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| 134 | virtual ProblemType _getPrimalType() const; |
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| 135 | virtual ProblemType _getDualType() const; |
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| 136 | |
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| 137 | virtual void _clear(); |
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| 138 | |
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[576] | 139 | virtual void _messageLevel(MessageLevel); |
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| 140 | |
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[461] | 141 | public: |
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| 142 | |
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| 143 | ///Solves LP with primal simplex method. |
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| 144 | SolveExitStatus solvePrimal(); |
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| 145 | |
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| 146 | ///Solves LP with dual simplex method. |
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| 147 | SolveExitStatus solveDual(); |
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| 148 | |
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| 149 | ///Solves LP with barrier method. |
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| 150 | SolveExitStatus solveBarrier(); |
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| 151 | |
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| 152 | ///Returns the constraint identifier understood by CLP. |
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| 153 | int clpRow(Row r) const { return rows(id(r)); } |
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| 154 | |
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| 155 | ///Returns the variable identifier understood by CLP. |
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| 156 | int clpCol(Col c) const { return cols(id(c)); } |
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| 157 | |
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| 158 | }; |
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| 159 | |
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| 160 | } //END OF NAMESPACE LEMON |
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| 161 | |
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| 162 | #endif //LEMON_CLP_H |
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| 163 | |
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