1 | /* -*- C++ -*- |
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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_LP_SKELETON |
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20 | #define LEMON_LP_SKELETON |
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21 | |
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22 | #include <lemon/lp_base.h> |
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23 | |
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24 | ///\file |
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25 | ///\brief A skeleton file to implement LP solver interfaces |
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26 | namespace lemon { |
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27 | |
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28 | ///A skeleton class to implement LP solver interfaces |
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29 | class LpSkeleton :public LpSolverBase { |
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30 | int col_num,row_num; |
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31 | |
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32 | protected: |
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33 | |
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34 | ///\e |
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35 | virtual LpSolverBase* _newLp(); |
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36 | ///\e |
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37 | virtual LpSolverBase* _copyLp(); |
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38 | /// \e |
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39 | virtual int _addCol(); |
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40 | /// \e |
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41 | virtual int _addRow(); |
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42 | /// \e |
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43 | virtual void _eraseCol(int i); |
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44 | /// \e |
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45 | virtual void _eraseRow(int i); |
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46 | /// \e |
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47 | virtual void _getColName(int col, std::string & name) const; |
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48 | /// \e |
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49 | virtual void _setColName(int col, const std::string & name); |
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50 | /// \e |
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51 | virtual int _colByName(const std::string& name) const; |
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52 | |
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53 | /// \e |
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54 | virtual void _setRowCoeffs(int i, ConstRowIterator b, ConstRowIterator e); |
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55 | /// \e |
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56 | virtual void _getRowCoeffs(int i, RowIterator b) const; |
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57 | /// \e |
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58 | virtual void _setColCoeffs(int i, ConstColIterator b, ConstColIterator e); |
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59 | /// \e |
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60 | virtual void _getColCoeffs(int i, ColIterator b) const; |
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61 | |
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62 | /// Set one element of the coefficient matrix |
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63 | virtual void _setCoeff(int row, int col, Value value); |
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64 | |
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65 | /// Get one element of the coefficient matrix |
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66 | virtual Value _getCoeff(int row, int col) const; |
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67 | |
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68 | /// The lower bound of a variable (column) have to be given by an |
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69 | /// extended number of type Value, i.e. a finite number of type |
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70 | /// Value or -\ref INF. |
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71 | virtual void _setColLowerBound(int i, Value value); |
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72 | /// \e |
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73 | |
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74 | /// The lower bound of a variable (column) is an |
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75 | /// extended number of type Value, i.e. a finite number of type |
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76 | /// Value or -\ref INF. |
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77 | virtual Value _getColLowerBound(int i) const; |
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78 | |
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79 | /// The upper bound of a variable (column) have to be given by an |
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80 | /// extended number of type Value, i.e. a finite number of type |
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81 | /// Value or \ref INF. |
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82 | virtual void _setColUpperBound(int i, Value value); |
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83 | /// \e |
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84 | |
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85 | /// The upper bound of a variable (column) is an |
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86 | /// extended number of type Value, i.e. a finite number of type |
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87 | /// Value or \ref INF. |
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88 | virtual Value _getColUpperBound(int i) const; |
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89 | |
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90 | // /// The lower bound of a linear expression (row) have to be given by an |
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91 | // /// extended number of type Value, i.e. a finite number of type |
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92 | // /// Value or -\ref INF. |
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93 | // virtual void _setRowLowerBound(int i, Value value); |
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94 | // /// \e |
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95 | |
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96 | // /// The upper bound of a linear expression (row) have to be given by an |
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97 | // /// extended number of type Value, i.e. a finite number of type |
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98 | // /// Value or \ref INF. |
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99 | // virtual void _setRowUpperBound(int i, Value value); |
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100 | |
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101 | /// The lower and upper bound of a linear expression (row) have to be |
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102 | /// given by an |
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103 | /// extended number of type Value, i.e. a finite number of type |
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104 | /// Value or +/-\ref INF. |
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105 | virtual void _setRowBounds(int i, Value lb, Value ub); |
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106 | /// \e |
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107 | |
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108 | |
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109 | /// The lower and the upper bound of |
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110 | /// a constraint (row) are |
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111 | /// extended numbers of type Value, i.e. finite numbers of type |
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112 | /// Value, -\ref INF or \ref INF. |
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113 | virtual void _getRowBounds(int i, Value &lb, Value &ub) const; |
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114 | /// \e |
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115 | |
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116 | |
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117 | /// \e |
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118 | virtual void _clearObj(); |
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119 | /// \e |
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120 | virtual void _setObjCoeff(int i, Value obj_coef); |
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121 | |
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122 | /// \e |
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123 | virtual Value _getObjCoeff(int i) const; |
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124 | |
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125 | ///\e |
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126 | |
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127 | ///\bug Wrong interface |
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128 | /// |
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129 | virtual SolveExitStatus _solve(); |
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130 | |
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131 | ///\e |
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132 | |
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133 | ///\bug Wrong interface |
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134 | /// |
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135 | virtual Value _getPrimal(int i) const; |
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136 | |
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137 | ///\e |
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138 | |
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139 | ///\bug Wrong interface |
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140 | /// |
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141 | virtual Value _getDual(int i) const; |
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142 | |
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143 | ///\e |
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144 | |
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145 | ///\bug Wrong interface |
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146 | /// |
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147 | virtual Value _getPrimalValue() const; |
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148 | |
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149 | ///\e |
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150 | |
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151 | ///\bug Wrong interface |
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152 | /// |
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153 | virtual SolutionStatus _getPrimalStatus() const; |
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154 | |
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155 | ////e |
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156 | virtual SolutionStatus _getDualStatus() const; |
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157 | |
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158 | |
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159 | ///\e |
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160 | virtual ProblemTypes _getProblemType() const; |
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161 | |
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162 | ///\e |
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163 | virtual void _setMax(); |
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164 | ///\e |
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165 | virtual void _setMin(); |
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166 | |
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167 | ///\e |
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168 | virtual bool _isMax() const; |
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169 | |
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170 | |
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171 | |
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172 | ///\e |
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173 | virtual bool _isBasicCol(int i) const; |
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174 | |
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175 | |
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176 | |
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177 | public: |
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178 | LpSkeleton() : LpSolverBase(), col_num(0), row_num(0) {} |
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179 | }; |
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180 | |
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181 | } //namespace lemon |
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182 | |
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183 | #endif // LEMON_LP_SKELETON |
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