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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42 | class ClpLp : public LpSolver { |
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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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53 | ClpLp(); |
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54 | /// \e |
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55 | ClpLp(const ClpLp&); |
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56 | /// \e |
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57 | ~ClpLp(); |
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58 | |
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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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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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139 | virtual void _messageLevel(MessageLevel); |
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140 | |
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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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