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) 2003-2006 |
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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 | #include <lemon/bits/traits.h> |
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20 | #include <lemon/bits/invalid.h> |
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21 | |
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22 | #include <lemon/bits/default_map.h> |
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23 | #include <lemon/bits/map_extender.h> |
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24 | |
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25 | #include <vector> |
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26 | #include <map> |
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27 | |
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28 | #include <iterator> |
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29 | #include <limits> |
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30 | |
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31 | ///\ingroup maps |
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32 | ///\file |
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33 | ///\brief Maps that makes it possible to iterate through the keys having |
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34 | ///a certain value |
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35 | /// |
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36 | /// |
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37 | |
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38 | |
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39 | namespace lemon { |
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40 | |
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41 | ///\ingroup graph_maps |
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42 | /// |
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43 | /// \brief Dynamic iterable bool map. |
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44 | /// |
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45 | /// This class provides a special graph map type which can store |
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46 | /// for each graph item(node, edge, etc.) a bool value. For both |
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47 | /// the true and the false it is possible to iterate on the keys which |
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48 | /// mapped to the given value. |
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49 | /// |
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50 | /// \param _Graph The graph type. |
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51 | /// \param _Item One of the graph's item type, the key of the map. |
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52 | template <typename _Graph, typename _Item> |
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53 | class IterableBoolMap : protected DefaultMap<_Graph, _Item, int> { |
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54 | private: |
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55 | typedef _Graph Graph; |
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56 | |
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57 | typedef typename ItemSetTraits<Graph, _Item>::ItemIt KeyIt; |
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58 | typedef DefaultMap<_Graph, _Item, int> Parent; |
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59 | |
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60 | std::vector<_Item> array; |
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61 | int sep; |
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62 | |
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63 | const Graph& graph; |
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64 | |
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65 | public: |
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66 | |
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67 | /// Indicates that the map if reference map. |
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68 | typedef True ReferenceMapTag; |
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69 | |
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70 | /// The key type |
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71 | typedef _Item Key; |
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72 | /// The value type |
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73 | typedef bool Value; |
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74 | /// The const reference type. |
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75 | typedef const Value& ConstReference; |
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76 | |
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77 | private: |
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78 | |
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79 | int position(const Key& key) const { |
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80 | return Parent::operator[](key); |
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81 | } |
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82 | |
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83 | public: |
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84 | |
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85 | /// \brief Refernce to the value of the map. |
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86 | /// |
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87 | /// This class is near to similar to the bool type. It can |
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88 | /// be converted to bool and it has the same operators. |
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89 | class Reference { |
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90 | friend class IterableBoolMap; |
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91 | private: |
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92 | Reference(IterableBoolMap& map, const Key& key) |
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93 | : _key(key), _map(map) {} |
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94 | public: |
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95 | |
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96 | Reference& operator=(const Reference& value) { |
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97 | _map.set(_key, (bool)value); |
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98 | return *this; |
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99 | } |
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100 | |
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101 | operator bool() const { |
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102 | return static_cast<const IterableBoolMap&>(_map)[_key]; |
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103 | } |
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104 | |
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105 | Reference& operator=(bool value) { |
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106 | _map.set(_key, value); |
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107 | return *this; |
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108 | } |
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109 | Reference& operator&=(bool value) { |
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110 | _map.set(_key, _map[_key] & value); |
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111 | return *this; |
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112 | } |
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113 | Reference& operator|=(bool value) { |
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114 | _map.set(_key, _map[_key] | value); |
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115 | return *this; |
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116 | } |
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117 | Reference& operator^=(bool value) { |
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118 | _map.set(_key, _map[_key] ^ value); |
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119 | return *this; |
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120 | } |
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121 | private: |
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122 | Key _key; |
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123 | IterableBoolMap& _map; |
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124 | }; |
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125 | |
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126 | /// \brief Constructor of the Map with a default value. |
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127 | /// |
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128 | /// Constructor of the Map with a default value. |
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129 | IterableBoolMap(const Graph& _graph, bool def = false) |
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130 | : Parent(_graph), graph(_graph) { |
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131 | for (KeyIt it(graph); it != INVALID; ++it) { |
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132 | Parent::set(it, array.size()); |
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133 | array.push_back(it); |
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134 | } |
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135 | sep = (def ? array.size() : 0); |
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136 | } |
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137 | |
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138 | /// \brief Const subscript operator of the map. |
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139 | /// |
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140 | /// Const subscript operator of the map. |
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141 | bool operator[](const Key& key) const { |
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142 | return position(key) < sep; |
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143 | } |
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144 | |
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145 | /// \brief Subscript operator of the map. |
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146 | /// |
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147 | /// Subscript operator of the map. |
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148 | Reference operator[](const Key& key) { |
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149 | return Reference(*this, key); |
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150 | } |
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151 | |
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152 | /// \brief Set operation of the map. |
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153 | /// |
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154 | /// Set operation of the map. |
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155 | void set(const Key& key, bool value) { |
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156 | int pos = position(key); |
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157 | if (value) { |
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158 | if (pos < sep) return; |
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159 | Key tmp = array[sep]; |
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160 | array[sep] = key; |
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161 | Parent::set(key, sep); |
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162 | array[pos] = tmp; |
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163 | Parent::set(tmp, pos); |
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164 | ++sep; |
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165 | } else { |
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166 | if (pos >= sep) return; |
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167 | --sep; |
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168 | Key tmp = array[sep]; |
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169 | array[sep] = key; |
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170 | Parent::set(key, sep); |
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171 | array[pos] = tmp; |
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172 | Parent::set(tmp, pos); |
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173 | } |
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174 | } |
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175 | |
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176 | /// \brief Returns the number of the keys mapped to true. |
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177 | /// |
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178 | /// Returns the number of the keys mapped to true. |
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179 | int trueNum() const { |
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180 | return sep; |
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181 | } |
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182 | |
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183 | /// \brief Returns the number of the keys mapped to false. |
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184 | /// |
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185 | /// Returns the number of the keys mapped to false. |
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186 | int falseNum() const { |
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187 | return array.size() - sep; |
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188 | } |
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189 | |
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190 | /// \brief Iterator for the keys mapped to true. |
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191 | /// |
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192 | /// Iterator for the keys mapped to true. It works |
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193 | /// like a graph item iterator in the map, it can be converted |
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194 | /// the key type of the map, incremented with \c ++ operator, and |
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195 | /// if the iterator leave the last valid key it will be equal to |
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196 | /// \c INVALID. |
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197 | class TrueIt : public Key { |
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198 | public: |
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199 | typedef Key Parent; |
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200 | |
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201 | /// \brief Creates an iterator. |
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202 | /// |
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203 | /// Creates an iterator. It iterates on the |
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204 | /// keys which mapped to true. |
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205 | /// \param _map The IterableIntMap |
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206 | TrueIt(const IterableBoolMap& _map) |
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207 | : Parent(_map.sep > 0 ? _map.array[_map.sep - 1] : INVALID), |
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208 | map(&_map) {} |
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209 | |
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210 | /// \brief Invalid constructor \& conversion. |
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211 | /// |
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212 | /// This constructor initializes the key to be invalid. |
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213 | /// \sa Invalid for more details. |
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214 | TrueIt(Invalid) : Parent(INVALID), map(0) {} |
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215 | |
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216 | /// \brief Increment operator. |
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217 | /// |
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218 | /// Increment Operator. |
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219 | TrueIt& operator++() { |
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220 | int pos = map->position(*this); |
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221 | Parent::operator=(pos > 0 ? map->array[pos - 1] : INVALID); |
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222 | return *this; |
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223 | } |
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224 | |
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225 | |
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226 | private: |
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227 | const IterableBoolMap* map; |
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228 | }; |
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229 | |
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230 | /// \brief Iterator for the keys mapped to false. |
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231 | /// |
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232 | /// Iterator for the keys mapped to false. It works |
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233 | /// like a graph item iterator in the map, it can be converted |
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234 | /// the key type of the map, incremented with \c ++ operator, and |
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235 | /// if the iterator leave the last valid key it will be equal to |
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236 | /// \c INVALID. |
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237 | class FalseIt : public Key { |
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238 | public: |
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239 | typedef Key Parent; |
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240 | |
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241 | /// \brief Creates an iterator. |
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242 | /// |
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243 | /// Creates an iterator. It iterates on the |
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244 | /// keys which mapped to false. |
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245 | /// \param _map The IterableIntMap |
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246 | FalseIt(const IterableBoolMap& _map) |
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247 | : Parent(_map.sep < (int)_map.array.size() ? |
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248 | _map.array.back() : INVALID), map(&_map) {} |
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249 | |
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250 | /// \brief Invalid constructor \& conversion. |
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251 | /// |
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252 | /// This constructor initializes the key to be invalid. |
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253 | /// \sa Invalid for more details. |
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254 | FalseIt(Invalid) : Parent(INVALID), map(0) {} |
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255 | |
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256 | /// \brief Increment operator. |
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257 | /// |
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258 | /// Increment Operator. |
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259 | FalseIt& operator++() { |
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260 | int pos = map->position(*this); |
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261 | Parent::operator=(pos > map->sep ? map->array[pos - 1] : INVALID); |
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262 | return *this; |
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263 | } |
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264 | |
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265 | private: |
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266 | const IterableBoolMap* map; |
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267 | }; |
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268 | |
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269 | /// \brief Iterator for the keys mapped to a given value. |
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270 | /// |
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271 | /// Iterator for the keys mapped to a given value. It works |
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272 | /// like a graph item iterator in the map, it can be converted |
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273 | /// the key type of the map, incremented with \c ++ operator, and |
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274 | /// if the iterator leave the last valid key it will be equal to |
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275 | /// \c INVALID. |
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276 | class ItemIt : public Key { |
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277 | public: |
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278 | typedef Key Parent; |
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279 | |
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280 | /// \brief Creates an iterator. |
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281 | /// |
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282 | /// Creates an iterator. It iterates on the |
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283 | /// keys which mapped to false. |
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284 | /// \param _map The IterableIntMap |
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285 | /// \param value Which elements should be iterated. |
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286 | ItemIt(const IterableBoolMap& _map, bool value) |
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287 | : Parent(value ? (_map.sep > 0 ? _map.array[_map.sep - 1] : INVALID) : |
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288 | (_map.sep < (int)_map.array.size() ? |
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289 | _map.array.back() : INVALID)), map(&_map) {} |
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290 | |
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291 | /// \brief Invalid constructor \& conversion. |
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292 | /// |
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293 | /// This constructor initializes the key to be invalid. |
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294 | /// \sa Invalid for more details. |
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295 | ItemIt(Invalid) : Parent(INVALID), map(0) {} |
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296 | |
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297 | /// \brief Increment operator. |
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298 | /// |
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299 | /// Increment Operator. |
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300 | ItemIt& operator++() { |
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301 | int pos = map->position(*this); |
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302 | int sep = pos >= map->sep ? map->sep : 0; |
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303 | Parent::operator=(pos > sep ? map->array[pos - 1] : INVALID); |
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304 | return *this; |
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305 | } |
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306 | |
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307 | private: |
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308 | const IterableBoolMap* map; |
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309 | }; |
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310 | |
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311 | protected: |
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312 | |
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313 | virtual void add(const Key& key) { |
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314 | Parent::add(key); |
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315 | Parent::set(key, array.size()); |
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316 | array.push_back(key); |
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317 | } |
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318 | |
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319 | virtual void add(const std::vector<Key>& keys) { |
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320 | Parent::add(keys); |
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321 | for (int i = 0; i < (int)keys.size(); ++i) { |
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322 | Parent::set(keys[i], array.size()); |
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323 | array.push_back(keys[i]); |
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324 | } |
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325 | } |
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326 | |
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327 | virtual void erase(const Key& key) { |
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328 | int pos = position(key); |
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329 | if (pos < sep) { |
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330 | --sep; |
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331 | Parent::set(array[sep], pos); |
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332 | array[pos] = array[sep]; |
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333 | Parent::set(array.back(), sep); |
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334 | array[sep] = array.back(); |
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335 | array.pop_back(); |
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336 | } else { |
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337 | Parent::set(array.back(), pos); |
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338 | array[pos] = array.back(); |
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339 | array.pop_back(); |
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340 | } |
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341 | Parent::erase(key); |
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342 | } |
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343 | |
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344 | virtual void erase(const std::vector<Key>& keys) { |
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345 | for (int i = 0; i < (int)keys.size(); ++i) { |
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346 | int pos = position(keys[i]); |
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347 | if (pos < sep) { |
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348 | --sep; |
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349 | Parent::set(array[sep], pos); |
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350 | array[pos] = array[sep]; |
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351 | Parent::set(array.back(), sep); |
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352 | array[sep] = array.back(); |
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353 | array.pop_back(); |
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354 | } else { |
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355 | Parent::set(array.back(), pos); |
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356 | array[pos] = array.back(); |
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357 | array.pop_back(); |
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358 | } |
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359 | } |
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360 | Parent::erase(keys); |
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361 | } |
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362 | |
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363 | virtual void build() { |
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364 | Parent::build(); |
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365 | for (KeyIt it(graph); it != INVALID; ++it) { |
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366 | Parent::set(it, array.size()); |
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367 | array.push_back(it); |
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368 | } |
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369 | sep = 0; |
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370 | } |
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371 | |
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372 | virtual void clear() { |
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373 | array.clear(); |
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374 | sep = 0; |
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375 | Parent::clear(); |
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376 | } |
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377 | |
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378 | }; |
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379 | |
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380 | |
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381 | namespace _iterable_maps_bits { |
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382 | template <typename Item> |
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383 | struct IterableIntMapNode { |
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384 | IterableIntMapNode() : value(-1) {} |
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385 | IterableIntMapNode(int _value) : value(_value) {} |
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386 | Item prev, next; |
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387 | int value; |
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388 | }; |
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389 | } |
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390 | |
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391 | ///\ingroup graph_maps |
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392 | /// |
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393 | /// \brief Dynamic iterable integer map. |
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394 | /// |
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395 | /// This class provides a special graph map type which can store |
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396 | /// for each graph item(node, edge, etc.) an integer value. For each |
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397 | /// non negative value it is possible to iterate on the keys which |
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398 | /// mapped to the given value. |
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399 | /// |
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400 | /// \param _Graph The graph type. |
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401 | /// \param _Item One of the graph's item type, the key of the map. |
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402 | template <typename _Graph, typename _Item> |
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403 | class IterableIntMap |
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404 | : protected MapExtender<DefaultMap<_Graph, _Item, _iterable_maps_bits:: |
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405 | IterableIntMapNode<_Item> > >{ |
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406 | public: |
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407 | typedef MapExtender<DefaultMap<_Graph, _Item, _iterable_maps_bits:: |
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408 | IterableIntMapNode<_Item> > > Parent; |
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409 | |
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410 | /// The key type |
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411 | typedef _Item Key; |
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412 | /// The value type |
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413 | typedef int Value; |
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414 | /// The graph type |
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415 | typedef _Graph Graph; |
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416 | |
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417 | /// \brief Constructor of the Map. |
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418 | /// |
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419 | /// Constructor of the Map. It set all values -1. |
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420 | explicit IterableIntMap(const Graph& graph) |
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421 | : Parent(graph) {} |
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422 | |
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423 | /// \brief Constructor of the Map with a given value. |
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424 | /// |
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425 | /// Constructor of the Map with a given value. |
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426 | explicit IterableIntMap(const Graph& graph, int value) |
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427 | : Parent(graph, _iterable_maps_bits::IterableIntMapNode<_Item>(value)) { |
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428 | if (value >= 0) { |
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429 | for (typename Parent::ItemIt it(*this); it != INVALID; ++it) { |
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430 | lace(it); |
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431 | } |
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432 | } |
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433 | } |
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434 | |
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435 | private: |
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436 | |
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437 | void unlace(const Key& key) { |
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438 | typename Parent::Value& node = Parent::operator[](key); |
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439 | if (node.value < 0) return; |
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440 | if (node.prev != INVALID) { |
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441 | Parent::operator[](node.prev).next = node.next; |
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442 | } else { |
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443 | first[node.value] = node.next; |
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444 | } |
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445 | if (node.next != INVALID) { |
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446 | Parent::operator[](node.next).prev = node.prev; |
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447 | } |
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448 | while (!first.empty() && first.back() == INVALID) { |
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449 | first.pop_back(); |
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450 | } |
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451 | } |
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452 | |
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453 | void lace(const Key& key) { |
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454 | typename Parent::Value& node = Parent::operator[](key); |
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455 | if (node.value < 0) return; |
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456 | if (node.value >= (int)first.size()) { |
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457 | first.resize(node.value + 1, INVALID); |
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458 | } |
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459 | node.prev = INVALID; |
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460 | node.next = first[node.value]; |
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461 | if (node.next != INVALID) { |
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462 | Parent::operator[](node.next).prev = key; |
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463 | } |
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464 | first[node.value] = key; |
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465 | } |
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466 | |
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467 | public: |
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468 | |
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469 | /// Indicates that the map if reference map. |
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470 | typedef True ReferenceMapTag; |
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471 | |
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472 | /// \brief Refernce to the value of the map. |
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473 | /// |
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474 | /// This class is near to similar to the int type. It can |
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475 | /// be converted to int and it has the same operators. |
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476 | class Reference { |
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477 | friend class IterableIntMap; |
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478 | private: |
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479 | Reference(IterableIntMap& map, const Key& key) |
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480 | : _key(key), _map(map) {} |
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481 | public: |
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482 | |
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483 | Reference& operator=(const Reference& value) { |
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484 | _map.set(_key, (const int&)value); |
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485 | return *this; |
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486 | } |
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487 | |
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488 | operator const int&() const { |
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489 | return static_cast<const IterableIntMap&>(_map)[_key]; |
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490 | } |
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491 | |
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492 | Reference& operator=(int value) { |
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493 | _map.set(_key, value); |
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494 | return *this; |
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495 | } |
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496 | Reference& operator++() { |
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497 | _map.set(_key, _map[_key] + 1); |
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498 | return *this; |
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499 | } |
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500 | int operator++(int) { |
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501 | int value = _map[_key]; |
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502 | _map.set(_key, value + 1); |
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503 | return value; |
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504 | } |
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505 | Reference& operator--() { |
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506 | _map.set(_key, _map[_key] - 1); |
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507 | return *this; |
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508 | } |
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509 | int operator--(int) { |
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510 | int value = _map[_key]; |
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511 | _map.set(_key, value - 1); |
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512 | return value; |
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513 | } |
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514 | Reference& operator+=(int value) { |
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515 | _map.set(_key, _map[_key] + value); |
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516 | return *this; |
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517 | } |
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518 | Reference& operator-=(int value) { |
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519 | _map.set(_key, _map[_key] - value); |
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520 | return *this; |
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521 | } |
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522 | Reference& operator*=(int value) { |
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523 | _map.set(_key, _map[_key] * value); |
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524 | return *this; |
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525 | } |
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526 | Reference& operator/=(int value) { |
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527 | _map.set(_key, _map[_key] / value); |
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528 | return *this; |
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529 | } |
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530 | Reference& operator%=(int value) { |
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531 | _map.set(_key, _map[_key] % value); |
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532 | return *this; |
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533 | } |
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534 | Reference& operator&=(int value) { |
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535 | _map.set(_key, _map[_key] & value); |
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536 | return *this; |
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537 | } |
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538 | Reference& operator|=(int value) { |
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539 | _map.set(_key, _map[_key] | value); |
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540 | return *this; |
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541 | } |
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542 | Reference& operator^=(int value) { |
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543 | _map.set(_key, _map[_key] ^ value); |
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544 | return *this; |
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545 | } |
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546 | Reference& operator<<=(int value) { |
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547 | _map.set(_key, _map[_key] << value); |
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548 | return *this; |
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549 | } |
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550 | Reference& operator>>=(int value) { |
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551 | _map.set(_key, _map[_key] >> value); |
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552 | return *this; |
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553 | } |
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554 | |
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555 | private: |
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556 | Key _key; |
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557 | IterableIntMap& _map; |
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558 | }; |
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559 | |
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560 | /// The const reference type. |
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561 | typedef const Value& ConstReference; |
---|
562 | |
---|
563 | /// \brief Gives back the maximal value plus one. |
---|
564 | /// |
---|
565 | /// Gives back the maximal value plus one. |
---|
566 | unsigned int size() const { |
---|
567 | return first.size(); |
---|
568 | } |
---|
569 | |
---|
570 | /// \brief Set operation of the map. |
---|
571 | /// |
---|
572 | /// Set operation of the map. |
---|
573 | void set(const Key& key, const Value& value) { |
---|
574 | unlace(key); |
---|
575 | Parent::operator[](key).value = value; |
---|
576 | lace(key); |
---|
577 | } |
---|
578 | |
---|
579 | /// \brief Const subscript operator of the map. |
---|
580 | /// |
---|
581 | /// Const subscript operator of the map. |
---|
582 | const Value& operator[](const Key& key) const { |
---|
583 | return Parent::operator[](key).value; |
---|
584 | } |
---|
585 | |
---|
586 | /// \brief Subscript operator of the map. |
---|
587 | /// |
---|
588 | /// Subscript operator of the map. |
---|
589 | Reference operator[](const Key& key) { |
---|
590 | return Reference(*this, key); |
---|
591 | } |
---|
592 | |
---|
593 | /// \brief Iterator for the keys with the same value. |
---|
594 | /// |
---|
595 | /// Iterator for the keys with the same value. It works |
---|
596 | /// like a graph item iterator in the map, it can be converted |
---|
597 | /// the item type of the map, incremented with \c ++ operator, and |
---|
598 | /// if the iterator leave the last valid item it will be equal to |
---|
599 | /// \c INVALID. |
---|
600 | class ItemIt : public _Item { |
---|
601 | public: |
---|
602 | typedef _Item Parent; |
---|
603 | |
---|
604 | /// \brief Invalid constructor \& conversion. |
---|
605 | /// |
---|
606 | /// This constructor initializes the item to be invalid. |
---|
607 | /// \sa Invalid for more details. |
---|
608 | ItemIt(Invalid) : Parent(INVALID), _map(0) {} |
---|
609 | |
---|
610 | /// \brief Creates an iterator with a value. |
---|
611 | /// |
---|
612 | /// Creates an iterator with a value. It iterates on the |
---|
613 | /// keys which have the given value. |
---|
614 | /// \param map The IterableIntMap |
---|
615 | /// \param value The value |
---|
616 | ItemIt(const IterableIntMap& map, int value) : _map(&map) { |
---|
617 | if (value < 0 || value >= (int)_map->first.size()) { |
---|
618 | Parent::operator=(INVALID); |
---|
619 | } else { |
---|
620 | Parent::operator=(_map->first[value]); |
---|
621 | } |
---|
622 | } |
---|
623 | |
---|
624 | /// \brief Increment operator. |
---|
625 | /// |
---|
626 | /// Increment Operator. |
---|
627 | ItemIt& operator++() { |
---|
628 | Parent::operator=(_map->IterableIntMap::Parent:: |
---|
629 | operator[](static_cast<Parent&>(*this)).next); |
---|
630 | return *this; |
---|
631 | } |
---|
632 | |
---|
633 | |
---|
634 | private: |
---|
635 | const IterableIntMap* _map; |
---|
636 | }; |
---|
637 | |
---|
638 | protected: |
---|
639 | |
---|
640 | virtual void erase(const Key& key) { |
---|
641 | unlace(key); |
---|
642 | Parent::erase(key); |
---|
643 | } |
---|
644 | |
---|
645 | virtual void erase(const std::vector<Key>& keys) { |
---|
646 | for (int i = 0; i < (int)keys.size(); ++i) { |
---|
647 | unlace(keys[i]); |
---|
648 | } |
---|
649 | Parent::erase(keys); |
---|
650 | } |
---|
651 | |
---|
652 | virtual void clear() { |
---|
653 | first.clear(); |
---|
654 | Parent::clear(); |
---|
655 | } |
---|
656 | |
---|
657 | private: |
---|
658 | std::vector<_Item> first; |
---|
659 | }; |
---|
660 | |
---|
661 | namespace _iterable_maps_bits { |
---|
662 | template <typename Item, typename Value> |
---|
663 | struct IterableValueMapNode { |
---|
664 | IterableValueMapNode(Value _value = Value()) : value(_value) {} |
---|
665 | Item prev, next; |
---|
666 | Value value; |
---|
667 | }; |
---|
668 | } |
---|
669 | |
---|
670 | ///\ingroup graph_maps |
---|
671 | /// |
---|
672 | /// \brief Dynamic iterable map for comparable values. |
---|
673 | /// |
---|
674 | /// This class provides a special graph map type which can store |
---|
675 | /// for each graph item(node, edge, etc.) a value. For each |
---|
676 | /// value it is possible to iterate on the keys which mapped to the |
---|
677 | /// given value. The type stores for each value a linked list with |
---|
678 | /// the items which mapped to the value, and the values are stored |
---|
679 | /// in balanced binary tree. The values of the map can be accessed |
---|
680 | /// with stl compatible forward iterator. |
---|
681 | /// |
---|
682 | /// This type is not reference map so it cannot be modified with |
---|
683 | /// the subscription operator. |
---|
684 | /// |
---|
685 | /// \see InvertableMap |
---|
686 | /// |
---|
687 | /// \param _Graph The graph type. |
---|
688 | /// \param _Item One of the graph's item type, the key of the map. |
---|
689 | /// \param _Value Any comparable value type. |
---|
690 | template <typename _Graph, typename _Item, typename _Value> |
---|
691 | class IterableValueMap |
---|
692 | : protected MapExtender<DefaultMap<_Graph, _Item, _iterable_maps_bits:: |
---|
693 | IterableValueMapNode<_Item, _Value> > >{ |
---|
694 | public: |
---|
695 | typedef MapExtender<DefaultMap<_Graph, _Item, _iterable_maps_bits:: |
---|
696 | IterableValueMapNode<_Item, _Value> > > |
---|
697 | Parent; |
---|
698 | |
---|
699 | /// The key type |
---|
700 | typedef _Item Key; |
---|
701 | /// The value type |
---|
702 | typedef _Value Value; |
---|
703 | /// The graph type |
---|
704 | typedef _Graph Graph; |
---|
705 | |
---|
706 | public: |
---|
707 | |
---|
708 | /// \brief Constructor of the Map with a given value. |
---|
709 | /// |
---|
710 | /// Constructor of the Map with a given value. |
---|
711 | explicit IterableValueMap(const Graph& graph, |
---|
712 | const Value& value = Value()) |
---|
713 | : Parent(graph, _iterable_maps_bits:: |
---|
714 | IterableValueMapNode<_Item, _Value>(value)) { |
---|
715 | for (typename Parent::ItemIt it(*this); it != INVALID; ++it) { |
---|
716 | lace(it); |
---|
717 | } |
---|
718 | } |
---|
719 | |
---|
720 | protected: |
---|
721 | |
---|
722 | void unlace(const Key& key) { |
---|
723 | typename Parent::Value& node = Parent::operator[](key); |
---|
724 | if (node.prev != INVALID) { |
---|
725 | Parent::operator[](node.prev).next = node.next; |
---|
726 | } else { |
---|
727 | if (node.next != INVALID) { |
---|
728 | first[node.value] = node.next; |
---|
729 | } else { |
---|
730 | first.erase(node.value); |
---|
731 | } |
---|
732 | } |
---|
733 | if (node.next != INVALID) { |
---|
734 | Parent::operator[](node.next).prev = node.prev; |
---|
735 | } |
---|
736 | } |
---|
737 | |
---|
738 | void lace(const Key& key) { |
---|
739 | typename Parent::Value& node = Parent::operator[](key); |
---|
740 | typename std::map<Value, Key>::iterator it = first.find(node.value); |
---|
741 | if (it == first.end()) { |
---|
742 | node.prev = node.next = INVALID; |
---|
743 | if (node.next != INVALID) { |
---|
744 | Parent::operator[](node.next).prev = key; |
---|
745 | } |
---|
746 | first.insert(make_pair(node.value, key)); |
---|
747 | } else { |
---|
748 | node.prev = INVALID; |
---|
749 | node.next = it->second; |
---|
750 | if (node.next != INVALID) { |
---|
751 | Parent::operator[](node.next).prev = key; |
---|
752 | } |
---|
753 | it->second = key; |
---|
754 | } |
---|
755 | } |
---|
756 | |
---|
757 | public: |
---|
758 | |
---|
759 | /// \brief Forward iterator for values. |
---|
760 | /// |
---|
761 | /// This iterator is an stl compatible forward |
---|
762 | /// iterator on the values of the map. The values can |
---|
763 | /// be accessed in the [beginValue, endValue) range. |
---|
764 | /// |
---|
765 | class ValueIterator |
---|
766 | : public std::iterator<std::forward_iterator_tag, Value> { |
---|
767 | friend class IterableValueMap; |
---|
768 | private: |
---|
769 | ValueIterator(typename std::map<Value, Key>::const_iterator _it) |
---|
770 | : it(_it) {} |
---|
771 | public: |
---|
772 | |
---|
773 | ValueIterator() {} |
---|
774 | |
---|
775 | ValueIterator& operator++() { ++it; return *this; } |
---|
776 | ValueIterator operator++(int) { |
---|
777 | ValueIterator tmp(*this); |
---|
778 | operator++(); |
---|
779 | return tmp; |
---|
780 | } |
---|
781 | |
---|
782 | const Value& operator*() const { return it->first; } |
---|
783 | const Value* operator->() const { return &(it->first); } |
---|
784 | |
---|
785 | bool operator==(ValueIterator jt) const { return it == jt.it; } |
---|
786 | bool operator!=(ValueIterator jt) const { return it != jt.it; } |
---|
787 | |
---|
788 | private: |
---|
789 | typename std::map<Value, Key>::const_iterator it; |
---|
790 | }; |
---|
791 | |
---|
792 | /// \brief Returns an iterator to the first value. |
---|
793 | /// |
---|
794 | /// Returns an stl compatible iterator to the |
---|
795 | /// first value of the map. The values of the |
---|
796 | /// map can be accessed in the [beginValue, endValue) |
---|
797 | /// range. |
---|
798 | ValueIterator beginValue() const { |
---|
799 | return ValueIterator(first.begin()); |
---|
800 | } |
---|
801 | |
---|
802 | /// \brief Returns an iterator after the last value. |
---|
803 | /// |
---|
804 | /// Returns an stl compatible iterator after the |
---|
805 | /// last value of the map. The values of the |
---|
806 | /// map can be accessed in the [beginValue, endValue) |
---|
807 | /// range. |
---|
808 | ValueIterator endValue() const { |
---|
809 | return ValueIterator(first.end()); |
---|
810 | } |
---|
811 | |
---|
812 | /// \brief Set operation of the map. |
---|
813 | /// |
---|
814 | /// Set operation of the map. |
---|
815 | void set(const Key& key, const Value& value) { |
---|
816 | unlace(key); |
---|
817 | Parent::operator[](key).value = value; |
---|
818 | lace(key); |
---|
819 | } |
---|
820 | |
---|
821 | /// \brief Const subscript operator of the map. |
---|
822 | /// |
---|
823 | /// Const subscript operator of the map. |
---|
824 | const Value& operator[](const Key& key) const { |
---|
825 | return Parent::operator[](key).value; |
---|
826 | } |
---|
827 | |
---|
828 | /// \brief Iterator for the keys with the same value. |
---|
829 | /// |
---|
830 | /// Iterator for the keys with the same value. It works |
---|
831 | /// like a graph item iterator in the map, it can be converted |
---|
832 | /// the item type of the map, incremented with \c ++ operator, and |
---|
833 | /// if the iterator leave the last valid item it will be equal to |
---|
834 | /// \c INVALID. |
---|
835 | class ItemIt : public _Item { |
---|
836 | public: |
---|
837 | typedef _Item Parent; |
---|
838 | |
---|
839 | /// \brief Invalid constructor \& conversion. |
---|
840 | /// |
---|
841 | /// This constructor initializes the item to be invalid. |
---|
842 | /// \sa Invalid for more details. |
---|
843 | ItemIt(Invalid) : Parent(INVALID), _map(0) {} |
---|
844 | |
---|
845 | /// \brief Creates an iterator with a value. |
---|
846 | /// |
---|
847 | /// Creates an iterator with a value. It iterates on the |
---|
848 | /// keys which have the given value. |
---|
849 | /// \param map The IterableValueMap |
---|
850 | /// \param value The value |
---|
851 | ItemIt(const IterableValueMap& map, const Value& value) : _map(&map) { |
---|
852 | typename std::map<Value, Key>::const_iterator it = |
---|
853 | map.first.find(value); |
---|
854 | if (it == map.first.end()) { |
---|
855 | Parent::operator=(INVALID); |
---|
856 | } else { |
---|
857 | Parent::operator=(it->second); |
---|
858 | } |
---|
859 | } |
---|
860 | |
---|
861 | /// \brief Increment operator. |
---|
862 | /// |
---|
863 | /// Increment Operator. |
---|
864 | ItemIt& operator++() { |
---|
865 | Parent::operator=(_map->IterableValueMap::Parent:: |
---|
866 | operator[](static_cast<Parent&>(*this)).next); |
---|
867 | return *this; |
---|
868 | } |
---|
869 | |
---|
870 | |
---|
871 | private: |
---|
872 | const IterableValueMap* _map; |
---|
873 | }; |
---|
874 | |
---|
875 | protected: |
---|
876 | |
---|
877 | virtual void add(const Key& key) { |
---|
878 | Parent::add(key); |
---|
879 | unlace(key); |
---|
880 | } |
---|
881 | |
---|
882 | virtual void add(const std::vector<Key>& keys) { |
---|
883 | Parent::add(keys); |
---|
884 | for (int i = 0; i < (int)keys.size(); ++i) { |
---|
885 | lace(keys[i]); |
---|
886 | } |
---|
887 | } |
---|
888 | |
---|
889 | virtual void erase(const Key& key) { |
---|
890 | unlace(key); |
---|
891 | Parent::erase(key); |
---|
892 | } |
---|
893 | |
---|
894 | virtual void erase(const std::vector<Key>& keys) { |
---|
895 | for (int i = 0; i < (int)keys.size(); ++i) { |
---|
896 | unlace(keys[i]); |
---|
897 | } |
---|
898 | Parent::erase(keys); |
---|
899 | } |
---|
900 | |
---|
901 | virtual void build() { |
---|
902 | Parent::build(); |
---|
903 | for (typename Parent::ItemIt it(*this); it != INVALID; ++it) { |
---|
904 | lace(it); |
---|
905 | } |
---|
906 | } |
---|
907 | |
---|
908 | virtual void clear() { |
---|
909 | first.clear(); |
---|
910 | Parent::clear(); |
---|
911 | } |
---|
912 | |
---|
913 | private: |
---|
914 | std::map<Value, Key> first; |
---|
915 | }; |
---|
916 | |
---|
917 | /// @} |
---|
918 | } |
---|