1 | //----------------------------------------------------------- |
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2 | // Copyright Christian Arnault LAL-Orsay CNRS |
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3 | // arnault@lal.in2p3.fr |
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4 | // See the complete license in cmt_license.txt "http://www.cecill.info". |
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5 | //----------------------------------------------------------- |
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6 | |
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7 | #ifndef __cmt_map_h__ |
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8 | #define __cmt_map_h__ |
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9 | |
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10 | #include "cmt_std.h" |
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11 | #include "cmt_string.h" |
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12 | #include "cmt_vector.h" |
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13 | |
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14 | #include <stdlib.h> |
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15 | |
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16 | /** |
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17 | * class cmt_node |
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18 | * |
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19 | * Implements a binary tree of T* keyed by the class K |
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20 | * |
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21 | * The class K must have the < and > operators. |
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22 | * |
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23 | * This is the basic constituent for the cmt_map class. |
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24 | */ |
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25 | template <class K, class T> class cmt_node |
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26 | { |
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27 | public: |
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28 | |
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29 | /** |
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30 | * Required constructor. |
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31 | * Provides the key and the value. |
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32 | */ |
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33 | cmt_node (const K& key, T& t) : |
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34 | m_left (0), |
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35 | m_key (key), |
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36 | m_t (&t), |
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37 | m_right (0) |
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38 | { |
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39 | } |
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40 | |
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41 | /** |
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42 | * Destructor |
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43 | */ |
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44 | ~cmt_node () |
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45 | { |
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46 | clear (); |
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47 | } |
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48 | |
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49 | /** |
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50 | * Recursive clear operation. |
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51 | * Will delete sub-nodes |
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52 | */ |
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53 | void clear () |
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54 | { |
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55 | if (m_left == 0) return; |
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56 | |
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57 | delete m_left; |
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58 | m_left = 0; |
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59 | |
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60 | m_t = 0; |
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61 | |
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62 | if (m_right == 0) return; |
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63 | |
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64 | delete m_right; |
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65 | m_right = 0; |
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66 | } |
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67 | |
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68 | /** |
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69 | * Add an item. |
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70 | */ |
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71 | void add (const K& key, T& t) |
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72 | { |
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73 | if (key < m_key) |
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74 | { |
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75 | if (m_left == 0) |
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76 | { |
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77 | m_left = new cmt_node (key, t); |
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78 | } |
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79 | else |
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80 | { |
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81 | m_left->add (key, t); |
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82 | } |
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83 | } |
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84 | else if (key > m_key) |
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85 | { |
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86 | if (m_right == 0) |
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87 | { |
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88 | m_right = new cmt_node (key, t); |
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89 | } |
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90 | else |
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91 | { |
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92 | m_right->add (key, t); |
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93 | } |
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94 | } |
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95 | else |
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96 | { |
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97 | m_t = &t; |
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98 | } |
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99 | } |
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100 | |
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101 | /** |
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102 | * Finds whether the tree starting from this node |
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103 | * contains this key |
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104 | */ |
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105 | bool has (const K& key) const |
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106 | { |
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107 | if (key < m_key) |
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108 | { |
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109 | if (m_left == 0) return (false); |
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110 | else return (m_left->has (key)); |
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111 | } |
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112 | else if (key > m_key) |
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113 | { |
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114 | if (m_right == 0) return (false); |
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115 | else return (m_right->has (key)); |
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116 | } |
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117 | else |
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118 | { |
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119 | return (true); |
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120 | } |
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121 | } |
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122 | |
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123 | /** |
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124 | * Finds in the tree starting from this node |
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125 | * the value associated with this key |
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126 | * Return 0 if not found |
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127 | */ |
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128 | T* find (const K& key) const |
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129 | { |
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130 | if (key < m_key) |
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131 | { |
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132 | if (m_left == 0) return (0); |
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133 | else return (m_left->find (key)); |
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134 | } |
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135 | else if (key > m_key) |
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136 | { |
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137 | if (m_right == 0) return (0); |
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138 | else return (m_right->find (key)); |
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139 | } |
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140 | else |
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141 | { |
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142 | return (m_t); |
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143 | } |
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144 | } |
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145 | |
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146 | /** |
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147 | * Finds in the tree starting from this node |
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148 | * the node holding the value associated with this key |
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149 | * Return 0 if not found |
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150 | */ |
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151 | const cmt_node* find_node (const K& key) const |
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152 | { |
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153 | if (key < m_key) |
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154 | { |
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155 | if (m_left == 0) return (0); |
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156 | else return (m_left->find_node (key)); |
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157 | } |
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158 | else if (key > m_key) |
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159 | { |
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160 | if (m_right == 0) return (0); |
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161 | else return (m_right->find_node (key)); |
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162 | } |
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163 | else |
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164 | { |
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165 | return (this); |
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166 | } |
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167 | } |
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168 | |
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169 | protected: |
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170 | cmt_node<K,T>* m_left; |
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171 | K m_key; |
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172 | T* m_t; |
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173 | cmt_node<K,T>* m_right; |
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174 | }; |
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175 | |
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176 | |
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177 | template <class K, class T> class cmt_vnode |
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178 | { |
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179 | public: |
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180 | |
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181 | /** |
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182 | * Required constructor. |
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183 | * Provides the key and the value. |
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184 | */ |
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185 | cmt_vnode (const K& key, T& t) : |
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186 | m_left (0), |
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187 | m_key (key), |
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188 | m_t (t), |
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189 | m_right (0) |
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190 | { |
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191 | } |
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192 | |
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193 | /** |
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194 | * Destructor |
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195 | */ |
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196 | ~cmt_vnode () |
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197 | { |
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198 | clear (); |
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199 | } |
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200 | |
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201 | /** |
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202 | * Recursive clear operation. |
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203 | * Will delete sub-nodes |
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204 | */ |
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205 | void clear () |
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206 | { |
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207 | if (m_left == 0) return; |
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208 | |
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209 | delete m_left; |
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210 | m_left = 0; |
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211 | |
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212 | if (m_right == 0) return; |
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213 | |
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214 | delete m_right; |
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215 | m_right = 0; |
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216 | } |
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217 | |
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218 | /** |
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219 | * Add an item. |
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220 | */ |
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221 | void add (const K& key, T& t) |
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222 | { |
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223 | if (key < m_key) |
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224 | { |
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225 | if (m_left == 0) |
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226 | { |
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227 | m_left = new cmt_vnode (key, t); |
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228 | } |
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229 | else |
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230 | { |
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231 | m_left->add (key, t); |
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232 | } |
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233 | } |
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234 | else if (key > m_key) |
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235 | { |
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236 | if (m_right == 0) |
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237 | { |
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238 | m_right = new cmt_vnode (key, t); |
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239 | } |
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240 | else |
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241 | { |
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242 | m_right->add (key, t); |
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243 | } |
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244 | } |
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245 | else |
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246 | { |
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247 | m_t = t; |
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248 | } |
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249 | } |
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250 | |
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251 | /** |
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252 | * Finds whether the tree starting from this node |
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253 | * contains this key |
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254 | */ |
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255 | bool has (const K& key) const |
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256 | { |
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257 | if (key < m_key) |
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258 | { |
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259 | if (m_left == 0) return (false); |
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260 | else return (m_left->has (key)); |
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261 | } |
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262 | else if (key > m_key) |
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263 | { |
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264 | if (m_right == 0) return (false); |
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265 | else return (m_right->has (key)); |
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266 | } |
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267 | else |
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268 | { |
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269 | return (true); |
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270 | } |
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271 | } |
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272 | |
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273 | /** |
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274 | * Finds in the tree starting from this node |
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275 | * the value associated with this key |
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276 | * Return 0 if not found |
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277 | */ |
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278 | const T* find (const K& key) const |
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279 | { |
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280 | if (key < m_key) |
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281 | { |
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282 | if (m_left == 0) return (0); |
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283 | else return (m_left->find (key)); |
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284 | } |
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285 | else if (key > m_key) |
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286 | { |
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287 | if (m_right == 0) return (0); |
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288 | else return (m_right->find (key)); |
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289 | } |
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290 | else |
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291 | { |
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292 | return (&m_t); |
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293 | } |
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294 | } |
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295 | |
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296 | /** |
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297 | * Finds in the tree starting from this node |
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298 | * the node holding the value associated with this key |
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299 | * Return 0 if not found |
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300 | */ |
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301 | const cmt_vnode* find_node (const K& key) const |
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302 | { |
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303 | if (key < m_key) |
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304 | { |
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305 | if (m_left == 0) return (0); |
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306 | else return (m_left->find_node (key)); |
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307 | } |
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308 | else if (key > m_key) |
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309 | { |
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310 | if (m_right == 0) return (0); |
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311 | else return (m_right->find_node (key)); |
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312 | } |
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313 | else |
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314 | { |
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315 | return (this); |
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316 | } |
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317 | } |
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318 | |
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319 | protected: |
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320 | cmt_vnode<K,T>* m_left; |
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321 | K m_key; |
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322 | T m_t; |
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323 | cmt_vnode<K,T>* m_right; |
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324 | }; |
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325 | |
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326 | |
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327 | /** |
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328 | * Public interface for maps. |
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329 | * It is implemented by one top cmt_node. |
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330 | * |
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331 | * At creation the map is empty. |
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332 | */ |
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333 | template <class K, class T> class cmt_map |
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334 | { |
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335 | public: |
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336 | |
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337 | /** |
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338 | * Constructor |
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339 | */ |
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340 | cmt_map () : m_top (0) |
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341 | { |
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342 | } |
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343 | |
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344 | /** |
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345 | * Destructor |
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346 | */ |
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347 | ~cmt_map () |
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348 | { |
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349 | clear (); |
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350 | } |
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351 | |
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352 | /** |
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353 | * clear: erase everything from this map |
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354 | */ |
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355 | void clear () |
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356 | { |
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357 | if (m_top != 0) |
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358 | { |
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359 | delete m_top; |
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360 | m_top = 0; |
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361 | } |
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362 | } |
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363 | |
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364 | /** |
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365 | * Add an entry. |
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366 | * |
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367 | * Existing entries with the same key will be overridden |
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368 | */ |
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369 | void add (const K& key, T& t) |
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370 | { |
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371 | if (m_top == 0) |
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372 | { |
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373 | m_top = new cmt_node<K, T> (key, t); |
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374 | } |
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375 | else |
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376 | { |
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377 | m_top->add (key, t); |
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378 | } |
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379 | } |
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380 | |
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381 | void add (const K& key, T* t) |
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382 | { |
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383 | if (m_top == 0) |
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384 | { |
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385 | m_top = new cmt_node<K, T> (key, *t); |
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386 | } |
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387 | else |
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388 | { |
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389 | m_top->add (key, *t); |
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390 | } |
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391 | } |
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392 | |
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393 | /** |
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394 | * Finds whether there is a node holding that key |
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395 | */ |
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396 | bool has (const K& key) const |
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397 | { |
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398 | if (m_top != 0) |
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399 | { |
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400 | return (m_top->has (key)); |
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401 | } |
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402 | else |
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403 | { |
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404 | return (false); |
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405 | } |
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406 | } |
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407 | |
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408 | /** |
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409 | * Finds the value associated with that key. |
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410 | * Returns 0 if not found |
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411 | */ |
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412 | T* find (const K& key) const |
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413 | { |
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414 | if (m_top != 0) |
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415 | { |
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416 | return (m_top->find (key)); |
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417 | } |
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418 | else |
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419 | { |
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420 | return (0); |
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421 | } |
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422 | } |
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423 | |
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424 | /** |
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425 | * Finds the node containing the value associated with that key. |
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426 | * Returns 0 if not found |
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427 | */ |
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428 | const cmt_node<K, T>* find_node (const K& key) const |
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429 | { |
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430 | if (m_top == 0) return (0); |
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431 | |
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432 | return (m_top->find_node (key)); |
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433 | } |
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434 | |
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435 | private: |
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436 | cmt_node<K, T>* m_top; |
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437 | }; |
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438 | |
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439 | template <class K, class T> class cmt_vmap |
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440 | { |
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441 | public: |
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442 | |
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443 | /** |
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444 | * Constructor |
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445 | */ |
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446 | cmt_vmap () : m_top (0) |
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447 | { |
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448 | } |
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449 | |
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450 | /** |
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451 | * Destructor |
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452 | */ |
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453 | ~cmt_vmap () |
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454 | { |
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455 | clear (); |
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456 | } |
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457 | |
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458 | /** |
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459 | * clear: erase everything from this map |
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460 | */ |
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461 | void clear () |
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462 | { |
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463 | if (m_top != 0) |
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464 | { |
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465 | delete m_top; |
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466 | m_top = 0; |
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467 | } |
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468 | } |
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469 | |
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470 | /** |
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471 | * Add an entry. |
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472 | * |
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473 | * Existing entries with the same key will be overridden |
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474 | */ |
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475 | void add (const K& key, T& t) |
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476 | { |
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477 | if (m_top == 0) |
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478 | { |
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479 | m_top = new cmt_vnode<K, T> (key, t); |
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480 | } |
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481 | else |
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482 | { |
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483 | m_top->add (key, t); |
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484 | } |
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485 | } |
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486 | |
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487 | /** |
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488 | * Finds whether there is a node holding that key |
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489 | */ |
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490 | bool has (const K& key) const |
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491 | { |
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492 | if (m_top != 0) |
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493 | { |
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494 | return (m_top->has (key)); |
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495 | } |
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496 | else |
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497 | { |
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498 | return (false); |
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499 | } |
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500 | } |
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501 | |
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502 | /** |
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503 | * Finds the value associated with that key. |
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504 | * Returns 0 if not found |
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505 | */ |
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506 | const T* find (const K& key) const |
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507 | { |
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508 | if (m_top != 0) |
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509 | { |
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510 | return (m_top->find (key)); |
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511 | } |
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512 | else |
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513 | { |
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514 | return (0); |
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515 | } |
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516 | } |
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517 | |
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518 | /** |
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519 | * Finds the node containing the value associated with that key. |
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520 | * Returns 0 if not found |
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521 | */ |
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522 | const cmt_vnode<K, T>* find_node (const K& key) const |
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523 | { |
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524 | if (m_top == 0) return (0); |
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525 | |
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526 | return (m_top->find_node (key)); |
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527 | } |
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528 | |
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529 | private: |
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530 | cmt_vnode<K, T>* m_top; |
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531 | }; |
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532 | |
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533 | |
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534 | |
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535 | |
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536 | /* |
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537 | T& operator [] (const K& key) |
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538 | { |
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539 | T* t = find (key); |
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540 | |
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541 | if (t == 0) |
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542 | { |
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543 | static T t; |
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544 | |
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545 | add (key, t); |
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546 | return ((*this)[key]); |
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547 | } |
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548 | else |
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549 | { |
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550 | return (*t); |
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551 | } |
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552 | } |
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553 | */ |
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554 | |
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555 | |
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556 | /* ------------------------------------------------------------ |
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557 | |
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558 | This is a future possible implementation for the remove node function |
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559 | |
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560 | void add (cmt_node* other) |
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561 | { |
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562 | if (other->m_key < m_key) |
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563 | { |
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564 | if (m_left == 0) |
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565 | { |
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566 | m_left = other; |
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567 | } |
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568 | else |
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569 | { |
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570 | m_left->add (other); |
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571 | } |
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572 | } |
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573 | else if (other->m_key > m_key) |
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574 | { |
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575 | if (m_right == 0) |
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576 | { |
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577 | m_right = other; |
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578 | } |
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579 | else |
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580 | { |
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581 | m_right->add (other); |
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582 | } |
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583 | } |
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584 | else |
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585 | { |
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586 | m_t = other->m_t; |
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587 | } |
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588 | } |
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589 | |
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590 | cmt_node* remove_greatest () |
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591 | { |
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592 | if (m_right == 0) return (this); |
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593 | |
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594 | cmt_node* result = m_right->remove_greatest (); |
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595 | if (result == m_right) m_right = 0; |
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596 | |
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597 | return (result); |
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598 | } |
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599 | |
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600 | cmt_node* remove_node (const K& key) |
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601 | { |
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602 | if (key < m_key) |
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603 | { |
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604 | if (m_left != 0) |
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605 | { |
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606 | cmt_node* node = m_left->remove_node (key); |
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607 | if (node != 0) |
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608 | { |
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609 | delete m_left; |
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610 | m_left = node; |
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611 | } |
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612 | } |
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613 | |
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614 | return (0); |
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615 | } |
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616 | else if (key > m_key) |
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617 | { |
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618 | if (m_right != 0) |
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619 | { |
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620 | cmt_node* node = m_right->remove_node (key); |
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621 | if (node != 0) |
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622 | { |
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623 | delete m_right; |
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624 | m_right = node; |
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625 | } |
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626 | } |
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627 | |
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628 | return (0); |
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629 | } |
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630 | else |
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631 | { |
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632 | // This node will be removed. |
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633 | // The replacement will be returned. |
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634 | |
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635 | if (m_left == 0) |
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636 | { |
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637 | cmt_node* rep = m_right; |
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638 | m_right == 0; |
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639 | return (rep); |
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640 | } |
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641 | else if (m_right == 0) |
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642 | { |
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643 | cmt_node* rep = m_left; |
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644 | m_left == 0; |
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645 | return (rep); |
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646 | } |
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647 | else |
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648 | { |
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649 | // here both sides are busy |
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650 | |
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651 | cmt_node* rep = remove_greatest (); |
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652 | |
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653 | rep->add (this); |
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654 | |
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655 | return (rep); |
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656 | } |
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657 | |
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658 | return (this); |
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659 | } |
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660 | } |
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661 | |
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662 | |
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663 | void cmt_map::remove (const K& key) |
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664 | { |
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665 | if (m_top == 0) return; |
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666 | |
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667 | cmt_node<K, T>* node = m_top->remove (key); |
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668 | if (node == 0) return; |
---|
669 | |
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670 | if (node == m_top) |
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671 | { |
---|
672 | } |
---|
673 | else |
---|
674 | { |
---|
675 | } |
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676 | } |
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677 | |
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678 | |
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679 | |
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680 | ------------------------------------------------------------ */ |
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681 | |
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682 | #endif |
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683 | |
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