1 | // -*- c++ -*- |
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2 | #ifndef LEMON_LP_SOLVER_WRAPPER_H |
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3 | #define LEMON_LP_SOLVER_WRAPPER_H |
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4 | |
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5 | ///\ingroup misc |
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6 | ///\file |
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7 | ///\brief Dijkstra algorithm. |
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8 | |
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9 | // #include <stdio.h> |
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10 | #include <stdlib.h> |
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11 | #include <iostream> |
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12 | #include <map> |
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13 | #include <limits> |
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14 | // #include <stdio> |
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15 | //#include <stdlib> |
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16 | extern "C" { |
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17 | #include "glpk.h" |
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18 | } |
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19 | |
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20 | #include <iostream> |
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21 | #include <vector> |
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22 | #include <string> |
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23 | #include <list> |
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24 | #include <memory> |
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25 | #include <utility> |
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26 | |
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27 | //#include <sage_graph.h> |
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28 | //#include <lemon/list_graph.h> |
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29 | //#include <lemon/graph_wrapper.h> |
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30 | #include <lemon/invalid.h> |
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31 | #include <expression.h> |
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32 | //#include <bfs_dfs.h> |
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33 | //#include <stp.h> |
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34 | //#include <lemon/max_flow.h> |
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35 | //#include <augmenting_flow.h> |
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36 | //#include <iter_map.h> |
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37 | |
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38 | using std::cout; |
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39 | using std::cin; |
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40 | using std::endl; |
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41 | |
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42 | namespace lemon { |
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43 | |
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44 | /// \addtogroup misc |
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45 | /// @{ |
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46 | |
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47 | /// \brief A partitioned vector with iterable classes. |
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48 | /// |
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49 | /// This class implements a container in which the data is stored in an |
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50 | /// stl vector, the range is partitioned into sets and each set is |
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51 | /// doubly linked in a list. |
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52 | /// That is, each class is iterable by lemon iterators, and any member of |
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53 | /// the vector can bo moved to an other class. |
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54 | template <typename T> |
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55 | class IterablePartition { |
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56 | protected: |
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57 | struct Node { |
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58 | T data; |
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59 | int prev; //invalid az -1 |
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60 | int next; |
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61 | }; |
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62 | std::vector<Node> nodes; |
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63 | struct Tip { |
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64 | int first; |
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65 | int last; |
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66 | }; |
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67 | std::vector<Tip> tips; |
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68 | public: |
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69 | /// The classes are indexed by integers from \c 0 to \c classNum()-1. |
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70 | int classNum() const { return tips.size(); } |
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71 | /// This lemon style iterator iterates through a class. |
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72 | class ClassIt; |
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73 | /// Constructor. The number of classes is to be given which is fixed |
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74 | /// over the life of the container. |
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75 | /// The partition classes are indexed from 0 to class_num-1. |
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76 | IterablePartition(int class_num) { |
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77 | for (int i=0; i<class_num; ++i) { |
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78 | Tip t; |
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79 | t.first=t.last=-1; |
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80 | tips.push_back(t); |
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81 | } |
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82 | } |
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83 | protected: |
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84 | void befuz(ClassIt it, int class_id) { |
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85 | if (tips[class_id].first==-1) { |
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86 | if (tips[class_id].last==-1) { |
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87 | nodes[it.i].prev=nodes[it.i].next=-1; |
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88 | tips[class_id].first=tips[class_id].last=it.i; |
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89 | } |
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90 | } else { |
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91 | nodes[it.i].prev=tips[class_id].last; |
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92 | nodes[it.i].next=-1; |
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93 | nodes[tips[class_id].last].next=it.i; |
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94 | tips[class_id].last=it.i; |
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95 | } |
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96 | } |
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97 | void kifuz(ClassIt it, int class_id) { |
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98 | if (tips[class_id].first==it.i) { |
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99 | if (tips[class_id].last==it.i) { |
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100 | tips[class_id].first=tips[class_id].last=-1; |
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101 | } else { |
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102 | tips[class_id].first=nodes[it.i].next; |
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103 | nodes[nodes[it.i].next].prev=-1; |
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104 | } |
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105 | } else { |
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106 | if (tips[class_id].last==it.i) { |
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107 | tips[class_id].last=nodes[it.i].prev; |
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108 | nodes[nodes[it.i].prev].next=-1; |
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109 | } else { |
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110 | nodes[nodes[it.i].next].prev=nodes[it.i].prev; |
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111 | nodes[nodes[it.i].prev].next=nodes[it.i].next; |
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112 | } |
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113 | } |
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114 | } |
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115 | public: |
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116 | /// A new element with data \c t is pushed into the vector and into class |
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117 | /// \c class_id. |
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118 | ClassIt push_back(const T& t, int class_id) { |
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119 | Node n; |
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120 | n.data=t; |
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121 | nodes.push_back(n); |
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122 | int i=nodes.size()-1; |
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123 | befuz(i, class_id); |
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124 | return i; |
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125 | } |
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126 | /// A member is moved to an other class. |
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127 | void set(ClassIt it, int old_class_id, int new_class_id) { |
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128 | kifuz(it.i, old_class_id); |
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129 | befuz(it.i, new_class_id); |
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130 | } |
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131 | /// Returns the data pointed by \c it. |
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132 | T& operator[](ClassIt it) { return nodes[it.i].data; } |
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133 | /// Returns the data pointed by \c it. |
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134 | const T& operator[](ClassIt it) const { return nodes[it.i].data; } |
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135 | ///. |
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136 | class ClassIt { |
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137 | friend class IterablePartition; |
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138 | protected: |
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139 | int i; |
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140 | public: |
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141 | /// Default constructor. |
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142 | ClassIt() { } |
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143 | /// This constructor constructs an iterator which points |
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144 | /// to the member of th container indexed by the integer _i. |
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145 | ClassIt(const int& _i) : i(_i) { } |
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146 | /// Invalid constructor. |
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147 | ClassIt(const Invalid&) : i(-1) { } |
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148 | friend bool operator<(const ClassIt& x, const ClassIt& y); |
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149 | friend std::ostream& operator<<(std::ostream& os, |
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150 | const ClassIt& it); |
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151 | }; |
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152 | friend bool operator<(const ClassIt& x, const ClassIt& y) { |
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153 | return (x.i < y.i); |
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154 | } |
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155 | friend std::ostream& operator<<(std::ostream& os, |
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156 | const ClassIt& it) { |
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157 | os << it.i; |
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158 | return os; |
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159 | } |
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160 | /// First member of class \c class_id. |
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161 | ClassIt& first(ClassIt& it, int class_id) const { |
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162 | it.i=tips[class_id].first; |
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163 | return it; |
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164 | } |
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165 | /// Next member. |
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166 | ClassIt& next(ClassIt& it) const { |
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167 | it.i=nodes[it.i].next; |
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168 | return it; |
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169 | } |
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170 | /// True iff the iterator is valid. |
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171 | bool valid(const ClassIt& it) const { return it.i!=-1; } |
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172 | }; |
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173 | |
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174 | |
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175 | /*! \e |
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176 | |
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177 | \todo A[x,y]-t cserel. Jobboldal, baloldal csere. |
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178 | \todo LEKERDEZESEK!!! |
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179 | \todo DOKSI!!!! Doxygen group!!! |
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180 | |
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181 | */ |
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182 | template <typename _Value> |
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183 | class LPSolverBase { |
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184 | public: |
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185 | /// \e |
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186 | typedef _Value Value; |
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187 | /// \e |
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188 | typedef IterablePartition<int>::ClassIt RowIt; |
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189 | /// \e |
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190 | typedef IterablePartition<int>::ClassIt ColIt; |
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191 | public: |
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192 | /// \e |
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193 | IterablePartition<int> row_iter_map; |
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194 | /// \e |
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195 | IterablePartition<int> col_iter_map; |
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196 | /// \e |
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197 | const int VALID_CLASS; |
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198 | /// \e |
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199 | const int INVALID_CLASS; |
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200 | /// \e |
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201 | static const _Value INF; |
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202 | public: |
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203 | /// \e |
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204 | LPSolverBase() : row_iter_map(2), |
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205 | col_iter_map(2), |
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206 | VALID_CLASS(0), INVALID_CLASS(1) { } |
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207 | /// \e |
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208 | virtual ~LPSolverBase() { } |
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209 | |
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210 | //MATRIX INDEPEDENT MANIPULATING FUNCTIONS |
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211 | |
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212 | public: |
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213 | /// \e |
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214 | virtual void setMinimize() = 0; |
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215 | /// \e |
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216 | virtual void setMaximize() = 0; |
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217 | |
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218 | //LOW LEVEL INTERFACE, MATRIX MANIPULATING FUNCTIONS |
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219 | |
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220 | protected: |
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221 | /// \e |
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222 | virtual int _addRow() = 0; |
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223 | /// \e |
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224 | virtual int _addCol() = 0; |
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225 | /// \e |
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226 | virtual void _setRowCoeffs(int i, |
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227 | const std::vector<std::pair<int, _Value> >& coeffs) = 0; |
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228 | /// \e |
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229 | virtual void _setColCoeffs(int i, |
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230 | const std::vector<std::pair<int, _Value> >& coeffs) = 0; |
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231 | /// \e |
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232 | virtual void _eraseCol(int i) = 0; |
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233 | /// \e |
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234 | virtual void _eraseRow(int i) = 0; |
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235 | public: |
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236 | /// \e |
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237 | enum Bound { FREE, LOWER, UPPER, DOUBLE, FIXED }; |
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238 | protected: |
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239 | /// \e |
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240 | /// The lower bound of a variable (column) have to be given by an |
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241 | /// extended number of type _Value, i.e. a finite number of type |
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242 | /// _Value or -INF. |
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243 | virtual void _setColLowerBound(int i, _Value value) = 0; |
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244 | /// \e |
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245 | /// The upper bound of a variable (column) have to be given by an |
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246 | /// extended number of type _Value, i.e. a finite number of type |
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247 | /// _Value or INF. |
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248 | virtual void _setColUpperBound(int i, _Value value) = 0; |
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249 | /// \e |
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250 | /// The lower bound of a variable (column) is an |
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251 | /// extended number of type _Value, i.e. a finite number of type |
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252 | /// _Value or -INF. |
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253 | virtual _Value _getColLowerBound(int i) = 0; |
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254 | /// \e |
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255 | /// The upper bound of a variable (column) is an |
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256 | /// extended number of type _Value, i.e. a finite number of type |
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257 | /// _Value or INF. |
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258 | virtual _Value _getColUpperBound(int i) = 0; |
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259 | /// \e |
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260 | virtual void _setColBounds(int i, Bound bound, |
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261 | _Value lo, _Value up) = 0; |
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262 | /// \e |
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263 | virtual void _setRowBounds(int i, Bound bound, |
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264 | _Value lo, _Value up) = 0; |
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265 | /// \e |
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266 | virtual void _setObjCoef(int i, _Value obj_coef) = 0; |
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267 | /// \e |
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268 | virtual _Value _getObjCoef(int i) = 0; |
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269 | |
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270 | //LOW LEVEL, SOLUTION RETRIEVING FUNCTIONS |
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271 | |
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272 | protected: |
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273 | virtual _Value _getPrimal(int i) = 0; |
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274 | |
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275 | //HIGH LEVEL INTERFACE, MATRIX MANIPULATING FUNTIONS |
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276 | |
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277 | public: |
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278 | /// \e |
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279 | RowIt addRow() { |
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280 | int i=_addRow(); |
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281 | RowIt row_it; |
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282 | row_iter_map.first(row_it, INVALID_CLASS); |
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283 | if (row_iter_map.valid(row_it)) { //van hasznalhato hely |
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284 | row_iter_map.set(row_it, INVALID_CLASS, VALID_CLASS); |
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285 | row_iter_map[row_it]=i; |
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286 | } else { //a cucc vegere kell inzertalni mert nincs szabad hely |
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287 | row_it=row_iter_map.push_back(i, VALID_CLASS); |
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288 | } |
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289 | return row_it; |
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290 | } |
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291 | /// \e |
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292 | ColIt addCol() { |
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293 | int i=_addCol(); |
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294 | ColIt col_it; |
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295 | col_iter_map.first(col_it, INVALID_CLASS); |
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296 | if (col_iter_map.valid(col_it)) { //van hasznalhato hely |
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297 | col_iter_map.set(col_it, INVALID_CLASS, VALID_CLASS); |
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298 | col_iter_map[col_it]=i; |
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299 | } else { //a cucc vegere kell inzertalni mert nincs szabad hely |
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300 | col_it=col_iter_map.push_back(i, VALID_CLASS); |
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301 | } |
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302 | return col_it; |
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303 | } |
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304 | /// \e |
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305 | template <typename Begin, typename End> |
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306 | void setRowCoeffs(RowIt row_it, Begin begin, End end) { |
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307 | std::vector<std::pair<int, double> > coeffs; |
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308 | for ( ; begin!=end; ++begin) { |
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309 | coeffs.push_back(std:: |
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310 | make_pair(col_iter_map[begin->first], begin->second)); |
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311 | } |
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312 | _setRowCoeffs(row_iter_map[row_it], coeffs); |
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313 | } |
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314 | /// \e |
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315 | template <typename Begin, typename End> |
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316 | void setColCoeffs(ColIt col_it, Begin begin, End end) { |
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317 | std::vector<std::pair<int, double> > coeffs; |
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318 | for ( ; begin!=end; ++begin) { |
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319 | coeffs.push_back(std:: |
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320 | make_pair(row_iter_map[begin->first], begin->second)); |
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321 | } |
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322 | _setColCoeffs(col_iter_map[col_it], coeffs); |
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323 | } |
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324 | /// \e |
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325 | void eraseCol(const ColIt& col_it) { |
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326 | col_iter_map.set(col_it, VALID_CLASS, INVALID_CLASS); |
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327 | int cols[2]; |
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328 | cols[1]=col_iter_map[col_it]; |
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329 | _eraseCol(cols[1]); |
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330 | col_iter_map[col_it]=0; //glpk specifikus, de kell ez?? |
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331 | ColIt it; |
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332 | for (col_iter_map.first(it, VALID_CLASS); |
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333 | col_iter_map.valid(it); col_iter_map.next(it)) { |
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334 | if (col_iter_map[it]>cols[1]) --col_iter_map[it]; |
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335 | } |
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336 | } |
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337 | /// \e |
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338 | void eraseRow(const RowIt& row_it) { |
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339 | row_iter_map.set(row_it, VALID_CLASS, INVALID_CLASS); |
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340 | int rows[2]; |
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341 | rows[1]=row_iter_map[row_it]; |
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342 | _eraseRow(rows[1]); |
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343 | row_iter_map[row_it]=0; //glpk specifikus, de kell ez?? |
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344 | RowIt it; |
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345 | for (row_iter_map.first(it, VALID_CLASS); |
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346 | row_iter_map.valid(it); row_iter_map.next(it)) { |
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347 | if (row_iter_map[it]>rows[1]) --row_iter_map[it]; |
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348 | } |
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349 | } |
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350 | /// \e |
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351 | void setColLowerBound(ColIt col_it, _Value lo) { |
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352 | _setColLowerBound(col_iter_map[col_it], lo); |
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353 | } |
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354 | /// \e |
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355 | void setColUpperBound(ColIt col_it, _Value up) { |
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356 | _setColUpperBound(col_iter_map[col_it], up); |
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357 | } |
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358 | /// \e |
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359 | _Value getColLowerBound(ColIt col_it) { |
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360 | return _getColLowerBound(col_iter_map[col_it]); |
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361 | } |
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362 | /// \e |
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363 | _Value getColUpperBound(ColIt col_it) { |
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364 | return _getColUpperBound(col_iter_map[col_it]); |
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365 | } |
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366 | /// \e |
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367 | void setColBounds(const ColIt& col_it, Bound bound, |
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368 | _Value lo, _Value up) { |
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369 | _setColBounds(col_iter_map[col_it], bound, lo, up); |
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370 | } |
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371 | /// \e |
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372 | void setRowBounds(const RowIt& row_it, Bound bound, |
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373 | _Value lo, _Value up) { |
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374 | _setRowBounds(row_iter_map[row_it], bound, lo, up); |
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375 | } |
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376 | /// \e |
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377 | void setObjCoef(const ColIt& col_it, _Value obj_coef) { |
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378 | _setObjCoef(col_iter_map[col_it], obj_coef); |
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379 | } |
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380 | /// \e |
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381 | _Value getObjCoef(const ColIt& col_it) { |
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382 | return _getObjCoef(col_iter_map[col_it]); |
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383 | } |
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384 | |
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385 | //MOST HIGH LEVEL, USER FRIEND FUNCTIONS |
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386 | |
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387 | /// \e |
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388 | typedef Expr<ColIt, _Value> Expression; |
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389 | /// \e |
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390 | typedef Expr<RowIt, _Value> DualExpression; |
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391 | /// \e |
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392 | void setRowCoeffs(RowIt row_it, const Expression& expr) { |
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393 | std::vector<std::pair<int, _Value> > row_coeffs; |
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394 | for(typename Expression::Data::const_iterator i=expr.data.begin(); |
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395 | i!=expr.data.end(); ++i) { |
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396 | row_coeffs.push_back(std::make_pair |
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397 | (col_iter_map[(*i).first], (*i).second)); |
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398 | } |
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399 | _setRowCoeffs(row_iter_map[row_it], row_coeffs); |
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400 | } |
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401 | /// \e |
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402 | void setColCoeffs(ColIt col_it, const DualExpression& expr) { |
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403 | std::vector<std::pair<int, _Value> > col_coeffs; |
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404 | for(typename DualExpression::Data::const_iterator i=expr.data.begin(); |
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405 | i!=expr.data.end(); ++i) { |
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406 | col_coeffs.push_back(std::make_pair |
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407 | (row_iter_map[(*i).first], (*i).second)); |
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408 | } |
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409 | _setColCoeffs(col_iter_map[col_it], col_coeffs); |
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410 | } |
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411 | /// \e |
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412 | void setObjCoeffs(const Expression& expr) { |
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413 | for(typename Expression::Data::const_iterator i=expr.data.begin(); |
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414 | i!=expr.data.end(); ++i) { |
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415 | setObjCoef((*i).first, (*i).second); |
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416 | } |
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417 | } |
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418 | //SOLVER FUNCTIONS |
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419 | |
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420 | /// \e |
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421 | virtual void solveSimplex() = 0; |
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422 | /// \e |
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423 | virtual void solvePrimalSimplex() = 0; |
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424 | /// \e |
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425 | virtual void solveDualSimplex() = 0; |
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426 | /// \e |
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427 | |
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428 | //HIGH LEVEL, SOLUTION RETRIEVING FUNCTIONS |
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429 | |
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430 | public: |
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431 | _Value getPrimal(const ColIt& col_it) { |
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432 | return _getPrimal(col_iter_map[col_it]); |
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433 | } |
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434 | /// \e |
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435 | virtual _Value getObjVal() = 0; |
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436 | |
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437 | //OTHER FUNCTIONS |
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438 | |
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439 | /// \e |
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440 | virtual int rowNum() const = 0; |
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441 | /// \e |
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442 | virtual int colNum() const = 0; |
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443 | /// \e |
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444 | virtual int warmUp() = 0; |
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445 | /// \e |
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446 | virtual void printWarmUpStatus(int i) = 0; |
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447 | /// \e |
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448 | virtual int getPrimalStatus() = 0; |
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449 | /// \e |
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450 | virtual void printPrimalStatus(int i) = 0; |
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451 | /// \e |
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452 | virtual int getDualStatus() = 0; |
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453 | /// \e |
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454 | virtual void printDualStatus(int i) = 0; |
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455 | /// Returns the status of the slack variable assigned to row \c row_it. |
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456 | virtual int getRowStat(const RowIt& row_it) = 0; |
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457 | /// \e |
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458 | virtual void printRowStatus(int i) = 0; |
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459 | /// Returns the status of the variable assigned to column \c col_it. |
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460 | virtual int getColStat(const ColIt& col_it) = 0; |
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461 | /// \e |
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462 | virtual void printColStatus(int i) = 0; |
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463 | }; |
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464 | |
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465 | template <typename _Value> |
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466 | const _Value LPSolverBase<_Value>::INF=std::numeric_limits<_Value>::infinity(); |
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467 | |
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468 | |
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469 | /// \brief Wrappers for LP solvers |
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470 | /// |
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471 | /// This class implements a lemon wrapper for glpk. |
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472 | /// Later other LP-solvers will be wrapped into lemon. |
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473 | /// The aim of this class is to give a general surface to different |
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474 | /// solvers, i.e. it makes possible to write algorithms using LP's, |
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475 | /// in which the solver can be changed to an other one easily. |
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476 | class LPGLPK : public LPSolverBase<double> { |
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477 | public: |
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478 | typedef LPSolverBase<double> Parent; |
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479 | |
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480 | public: |
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481 | /// \e |
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482 | LPX* lp; |
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483 | |
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484 | public: |
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485 | /// \e |
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486 | LPGLPK() : Parent(), |
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487 | lp(lpx_create_prob()) { |
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488 | lpx_set_int_parm(lp, LPX_K_DUAL, 1); |
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489 | } |
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490 | /// \e |
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491 | ~LPGLPK() { |
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492 | lpx_delete_prob(lp); |
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493 | } |
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494 | |
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495 | //MATRIX INDEPEDENT MANIPULATING FUNCTIONS |
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496 | |
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497 | /// \e |
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498 | void setMinimize() { |
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499 | lpx_set_obj_dir(lp, LPX_MIN); |
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500 | } |
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501 | /// \e |
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502 | void setMaximize() { |
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503 | lpx_set_obj_dir(lp, LPX_MAX); |
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504 | } |
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505 | |
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506 | //LOW LEVEL INTERFACE, MATRIX MANIPULATING FUNCTIONS |
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507 | |
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508 | protected: |
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509 | /// \e |
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510 | int _addCol() { |
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511 | int i=lpx_add_cols(lp, 1); |
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512 | _setColLowerBound(i, -INF); |
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513 | _setColUpperBound(i, INF); |
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514 | return i; |
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515 | } |
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516 | /// \e |
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517 | int _addRow() { |
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518 | int i=lpx_add_rows(lp, 1); |
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519 | return i; |
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520 | } |
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521 | /// \e |
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522 | virtual void _setRowCoeffs(int i, |
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523 | const std::vector<std::pair<int, double> >& coeffs) { |
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524 | int mem_length=1+colNum(); |
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525 | int* indices = new int[mem_length]; |
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526 | double* doubles = new double[mem_length]; |
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527 | int length=0; |
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528 | for (std::vector<std::pair<int, double> >:: |
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529 | const_iterator it=coeffs.begin(); it!=coeffs.end(); ++it) { |
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530 | ++length; |
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531 | indices[length]=it->first; |
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532 | doubles[length]=it->second; |
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533 | // std::cout << " " << indices[length] << " " |
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534 | // << doubles[length] << std::endl; |
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535 | } |
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536 | // std::cout << i << " " << length << std::endl; |
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537 | lpx_set_mat_row(lp, i, length, indices, doubles); |
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538 | delete [] indices; |
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539 | delete [] doubles; |
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540 | } |
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541 | /// \e |
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542 | virtual void _setColCoeffs(int i, |
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543 | const std::vector<std::pair<int, double> >& coeffs) { |
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544 | int mem_length=1+rowNum(); |
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545 | int* indices = new int[mem_length]; |
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546 | double* doubles = new double[mem_length]; |
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547 | int length=0; |
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548 | for (std::vector<std::pair<int, double> >:: |
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549 | const_iterator it=coeffs.begin(); it!=coeffs.end(); ++it) { |
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550 | ++length; |
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551 | indices[length]=it->first; |
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552 | doubles[length]=it->second; |
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553 | } |
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554 | lpx_set_mat_col(lp, i, length, indices, doubles); |
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555 | delete [] indices; |
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556 | delete [] doubles; |
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557 | } |
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558 | /// \e |
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559 | virtual void _eraseCol(int i) { |
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560 | int cols[2]; |
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561 | cols[1]=i; |
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562 | lpx_del_cols(lp, 1, cols); |
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563 | } |
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564 | virtual void _eraseRow(int i) { |
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565 | int rows[2]; |
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566 | rows[1]=i; |
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567 | lpx_del_rows(lp, 1, rows); |
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568 | } |
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569 | virtual void _setColLowerBound(int i, double lo) { |
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570 | if (lo==INF) { |
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571 | //FIXME error |
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572 | } |
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573 | int b=lpx_get_col_type(lp, i); |
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574 | double up=lpx_get_col_ub(lp, i); |
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575 | if (lo==-INF) { |
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576 | switch (b) { |
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577 | case LPX_FR: |
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578 | case LPX_LO: |
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579 | lpx_set_col_bnds(lp, i, LPX_FR, lo, up); |
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580 | break; |
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581 | case LPX_UP: |
---|
582 | break; |
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583 | case LPX_DB: |
---|
584 | case LPX_FX: |
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585 | lpx_set_col_bnds(lp, i, LPX_UP, lo, up); |
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586 | break; |
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587 | default: ; |
---|
588 | //FIXME error |
---|
589 | } |
---|
590 | } else { |
---|
591 | switch (b) { |
---|
592 | case LPX_FR: |
---|
593 | case LPX_LO: |
---|
594 | lpx_set_col_bnds(lp, i, LPX_LO, lo, up); |
---|
595 | break; |
---|
596 | case LPX_UP: |
---|
597 | case LPX_DB: |
---|
598 | case LPX_FX: |
---|
599 | if (lo==up) |
---|
600 | lpx_set_col_bnds(lp, i, LPX_FX, lo, up); |
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601 | else |
---|
602 | lpx_set_col_bnds(lp, i, LPX_DB, lo, up); |
---|
603 | break; |
---|
604 | default: ; |
---|
605 | //FIXME error |
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606 | } |
---|
607 | } |
---|
608 | } |
---|
609 | virtual void _setColUpperBound(int i, double up) { |
---|
610 | if (up==-INF) { |
---|
611 | //FIXME error |
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612 | } |
---|
613 | int b=lpx_get_col_type(lp, i); |
---|
614 | double lo=lpx_get_col_lb(lp, i); |
---|
615 | if (up==INF) { |
---|
616 | switch (b) { |
---|
617 | case LPX_FR: |
---|
618 | case LPX_LO: |
---|
619 | break; |
---|
620 | case LPX_UP: |
---|
621 | lpx_set_col_bnds(lp, i, LPX_FR, lo, up); |
---|
622 | break; |
---|
623 | case LPX_DB: |
---|
624 | case LPX_FX: |
---|
625 | lpx_set_col_bnds(lp, i, LPX_LO, lo, up); |
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626 | break; |
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627 | default: ; |
---|
628 | //FIXME error |
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629 | } |
---|
630 | } else { |
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631 | switch (b) { |
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632 | case LPX_FR: |
---|
633 | lpx_set_col_bnds(lp, i, LPX_UP, lo, up); |
---|
634 | case LPX_LO: |
---|
635 | if (lo==up) |
---|
636 | lpx_set_col_bnds(lp, i, LPX_FX, lo, up); |
---|
637 | else |
---|
638 | lpx_set_col_bnds(lp, i, LPX_DB, lo, up); |
---|
639 | break; |
---|
640 | case LPX_UP: |
---|
641 | lpx_set_col_bnds(lp, i, LPX_UP, lo, up); |
---|
642 | break; |
---|
643 | case LPX_DB: |
---|
644 | case LPX_FX: |
---|
645 | if (lo==up) |
---|
646 | lpx_set_col_bnds(lp, i, LPX_FX, lo, up); |
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647 | else |
---|
648 | lpx_set_col_bnds(lp, i, LPX_DB, lo, up); |
---|
649 | break; |
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650 | default: ; |
---|
651 | //FIXME error |
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652 | } |
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653 | } |
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654 | } |
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655 | virtual double _getColLowerBound(int i) { |
---|
656 | int b=lpx_get_col_type(lp, i); |
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657 | switch (b) { |
---|
658 | case LPX_FR: |
---|
659 | return -INF; |
---|
660 | case LPX_LO: |
---|
661 | return lpx_get_col_lb(lp, i); |
---|
662 | case LPX_UP: |
---|
663 | return -INF; |
---|
664 | case LPX_DB: |
---|
665 | case LPX_FX: |
---|
666 | return lpx_get_col_lb(lp, i); |
---|
667 | default: ; |
---|
668 | //FIXME error |
---|
669 | return 0.0; |
---|
670 | } |
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671 | } |
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672 | virtual double _getColUpperBound(int i) { |
---|
673 | int b=lpx_get_col_type(lp, i); |
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674 | switch (b) { |
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675 | case LPX_FR: |
---|
676 | case LPX_LO: |
---|
677 | return INF; |
---|
678 | case LPX_UP: |
---|
679 | case LPX_DB: |
---|
680 | case LPX_FX: |
---|
681 | return lpx_get_col_ub(lp, i); |
---|
682 | default: ; |
---|
683 | //FIXME error |
---|
684 | return 0.0; |
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685 | } |
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686 | } |
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687 | virtual void _setColBounds(int i, Bound bound, |
---|
688 | double lo, double up) { |
---|
689 | switch (bound) { |
---|
690 | case FREE: |
---|
691 | lpx_set_col_bnds(lp, i, LPX_FR, lo, up); |
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692 | break; |
---|
693 | case LOWER: |
---|
694 | lpx_set_col_bnds(lp, i, LPX_LO, lo, up); |
---|
695 | break; |
---|
696 | case UPPER: |
---|
697 | lpx_set_col_bnds(lp, i, LPX_UP, lo, up); |
---|
698 | break; |
---|
699 | case DOUBLE: |
---|
700 | lpx_set_col_bnds(lp, i, LPX_DB, lo, up); |
---|
701 | break; |
---|
702 | case FIXED: |
---|
703 | lpx_set_col_bnds(lp, i, LPX_FX, lo, up); |
---|
704 | break; |
---|
705 | } |
---|
706 | } |
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707 | virtual void _setRowBounds(int i, Bound bound, |
---|
708 | double lo, double up) { |
---|
709 | switch (bound) { |
---|
710 | case FREE: |
---|
711 | lpx_set_row_bnds(lp, i, LPX_FR, lo, up); |
---|
712 | break; |
---|
713 | case LOWER: |
---|
714 | lpx_set_row_bnds(lp, i, LPX_LO, lo, up); |
---|
715 | break; |
---|
716 | case UPPER: |
---|
717 | lpx_set_row_bnds(lp, i, LPX_UP, lo, up); |
---|
718 | break; |
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719 | case DOUBLE: |
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720 | lpx_set_row_bnds(lp, i, LPX_DB, lo, up); |
---|
721 | break; |
---|
722 | case FIXED: |
---|
723 | lpx_set_row_bnds(lp, i, LPX_FX, lo, up); |
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724 | break; |
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725 | } |
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726 | } |
---|
727 | protected: |
---|
728 | /// \e |
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729 | virtual double _getObjCoef(int i) { |
---|
730 | return lpx_get_obj_coef(lp, i); |
---|
731 | } |
---|
732 | /// \e |
---|
733 | virtual void _setObjCoef(int i, double obj_coef) { |
---|
734 | lpx_set_obj_coef(lp, i, obj_coef); |
---|
735 | } |
---|
736 | public: |
---|
737 | /// \e |
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738 | void solveSimplex() { lpx_simplex(lp); } |
---|
739 | /// \e |
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740 | void solvePrimalSimplex() { lpx_simplex(lp); } |
---|
741 | /// \e |
---|
742 | void solveDualSimplex() { lpx_simplex(lp); } |
---|
743 | /// \e |
---|
744 | protected: |
---|
745 | virtual double _getPrimal(int i) { |
---|
746 | return lpx_get_col_prim(lp, i); |
---|
747 | } |
---|
748 | public: |
---|
749 | /// \e |
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750 | double getObjVal() { return lpx_get_obj_val(lp); } |
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751 | /// \e |
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752 | int rowNum() const { return lpx_get_num_rows(lp); } |
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753 | /// \e |
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754 | int colNum() const { return lpx_get_num_cols(lp); } |
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755 | /// \e |
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756 | int warmUp() { return lpx_warm_up(lp); } |
---|
757 | /// \e |
---|
758 | void printWarmUpStatus(int i) { |
---|
759 | switch (i) { |
---|
760 | case LPX_E_OK: cout << "LPX_E_OK" << endl; break; |
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761 | case LPX_E_EMPTY: cout << "LPX_E_EMPTY" << endl; break; |
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762 | case LPX_E_BADB: cout << "LPX_E_BADB" << endl; break; |
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763 | case LPX_E_SING: cout << "LPX_E_SING" << endl; break; |
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764 | } |
---|
765 | } |
---|
766 | /// \e |
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767 | int getPrimalStatus() { return lpx_get_prim_stat(lp); } |
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768 | /// \e |
---|
769 | void printPrimalStatus(int i) { |
---|
770 | switch (i) { |
---|
771 | case LPX_P_UNDEF: cout << "LPX_P_UNDEF" << endl; break; |
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772 | case LPX_P_FEAS: cout << "LPX_P_FEAS" << endl; break; |
---|
773 | case LPX_P_INFEAS: cout << "LPX_P_INFEAS" << endl; break; |
---|
774 | case LPX_P_NOFEAS: cout << "LPX_P_NOFEAS" << endl; break; |
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775 | } |
---|
776 | } |
---|
777 | /// \e |
---|
778 | int getDualStatus() { return lpx_get_dual_stat(lp); } |
---|
779 | /// \e |
---|
780 | void printDualStatus(int i) { |
---|
781 | switch (i) { |
---|
782 | case LPX_D_UNDEF: cout << "LPX_D_UNDEF" << endl; break; |
---|
783 | case LPX_D_FEAS: cout << "LPX_D_FEAS" << endl; break; |
---|
784 | case LPX_D_INFEAS: cout << "LPX_D_INFEAS" << endl; break; |
---|
785 | case LPX_D_NOFEAS: cout << "LPX_D_NOFEAS" << endl; break; |
---|
786 | } |
---|
787 | } |
---|
788 | /// Returns the status of the slack variable assigned to row \c row_it. |
---|
789 | int getRowStat(const RowIt& row_it) { |
---|
790 | return lpx_get_row_stat(lp, row_iter_map[row_it]); |
---|
791 | } |
---|
792 | /// \e |
---|
793 | void printRowStatus(int i) { |
---|
794 | switch (i) { |
---|
795 | case LPX_BS: cout << "LPX_BS" << endl; break; |
---|
796 | case LPX_NL: cout << "LPX_NL" << endl; break; |
---|
797 | case LPX_NU: cout << "LPX_NU" << endl; break; |
---|
798 | case LPX_NF: cout << "LPX_NF" << endl; break; |
---|
799 | case LPX_NS: cout << "LPX_NS" << endl; break; |
---|
800 | } |
---|
801 | } |
---|
802 | /// Returns the status of the variable assigned to column \c col_it. |
---|
803 | int getColStat(const ColIt& col_it) { |
---|
804 | return lpx_get_col_stat(lp, col_iter_map[col_it]); |
---|
805 | } |
---|
806 | /// \e |
---|
807 | void printColStatus(int i) { |
---|
808 | switch (i) { |
---|
809 | case LPX_BS: cout << "LPX_BS" << endl; break; |
---|
810 | case LPX_NL: cout << "LPX_NL" << endl; break; |
---|
811 | case LPX_NU: cout << "LPX_NU" << endl; break; |
---|
812 | case LPX_NF: cout << "LPX_NF" << endl; break; |
---|
813 | case LPX_NS: cout << "LPX_NS" << endl; break; |
---|
814 | } |
---|
815 | } |
---|
816 | }; |
---|
817 | |
---|
818 | /// @} |
---|
819 | |
---|
820 | } //namespace lemon |
---|
821 | |
---|
822 | #endif //LEMON_LP_SOLVER_WRAPPER_H |
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