Mercurial > fife-parpg
annotate engine/core/util/structures/priorityqueue.h @ 697:ecaa4d98f05f tip
Abstracted the GUI code and refactored the GUIChan-specific code into its own module.
* Most of the GUIChan code has been refactored into its own gui/guichan module. However, references to the GuiFont class still persist in the Engine and GuiManager code and these will need further refactoring.
* GuiManager is now an abstract base class which specific implementations (e.g. GUIChan) should subclass.
* The GUIChan GUI code is now a concrete implementation of GuiManager, most of which is in the new GuiChanGuiManager class.
* The GUI code in the Console class has been refactored out of the Console and into the GUIChan module as its own GuiChanConsoleWidget class. The rest of the Console class related to executing commands was left largely unchanged.
* Existing client code may need to downcast the GuiManager pointer received from FIFE::Engine::getGuiManager() to GuiChanGuiManager, since not all functionality is represented in the GuiManager abstract base class. Python client code can use the new GuiChanGuiManager.castTo static method for this purpose.
author | M. George Hansen <technopolitica@gmail.com> |
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date | Sat, 18 Jun 2011 00:28:40 -1000 |
parents | 90005975cdbb |
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rev | line source |
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1 /*************************************************************************** |
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2 * Copyright (C) 2005-2008 by the FIFE team * |
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3 * http://www.fifengine.de * |
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4 * This file is part of FIFE. * |
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5 * * |
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6 * FIFE is free software; you can redistribute it and/or * |
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7 * modify it under the terms of the GNU Lesser General Public * |
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8 * License as published by the Free Software Foundation; either * |
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9 * version 2.1 of the License, or (at your option) any later version. * |
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10 * * |
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11 * This library is distributed in the hope that it will be useful, * |
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * |
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14 * Lesser General Public License for more details. * |
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15 * * |
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16 * You should have received a copy of the GNU Lesser General Public * |
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17 * License along with this library; if not, write to the * |
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18 * Free Software Foundation, Inc., * |
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19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * |
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20 ***************************************************************************/ |
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21 |
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22 #ifndef FIFE_SOLVER_INDEXEDPQ_H |
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23 #define FIFE_SOLVER_INDEXEDPQ_H |
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24 |
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25 #include <cassert> |
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26 #include <list> |
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27 |
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28 namespace FIFE { |
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29 |
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30 /** A pq which stores index-value pairs for elements. |
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31 * |
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32 * This acts as a normal PQ but stores some extra information about the |
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33 * elements that it's storing, namely a special unique index. |
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34 */ |
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35 template<typename index_type, typename priority_type> |
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36 class PriorityQueue { |
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37 public: |
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38 /** Used for element ordering. |
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39 * |
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40 */ |
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41 enum Ordering { |
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42 Ascending, //!< lowest priority first. |
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43 Descending //!< highest priority first. |
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44 }; |
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45 |
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46 typedef std::pair<index_type, priority_type> value_type; |
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47 |
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48 /** Constructor |
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49 * |
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50 */ |
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51 PriorityQueue(void) : m_ordering(Ascending) { |
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52 } |
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53 |
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54 /** Constructor |
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55 * |
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56 * @param ordering The ordering the priority queue should use. |
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57 */ |
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58 PriorityQueue(const Ordering ordering) : m_ordering(ordering) { |
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59 } |
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60 |
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61 /** Pushes a new element onto the queue. |
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62 * |
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63 * The element is pushed onto the queue and then moved up the queue until it's |
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64 * in the correct position by priority. |
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65 * |
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66 * @param element Of type value_type which contains both the index and the priority of the element. |
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67 */ |
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68 void pushElement(const value_type& element); |
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69 |
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70 /** Pops the element with the highest priority from the queue. |
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71 * |
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72 * Removes and deletes the highest priority element. |
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73 */ |
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74 void popElement(void); |
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75 |
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76 /** Changes the priority of an element. |
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77 * |
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78 * Locates the element with the given index and changes it's priority to the given |
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79 * priority, it then re-orders the priority queue to take account of this new information. |
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80 * |
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81 * @param index The index of the element to change the priority of. |
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82 * @param newPriority The new priority of the element. |
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83 * @return True if the element could be found, false otherwise. |
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84 */ |
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85 bool changeElementPriority(const index_type& index, const priority_type& newPriority); |
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86 |
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87 /** Removes all elements from the priority queue. |
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88 * |
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89 */ |
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90 void clear(void); |
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91 |
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92 /** Retrieves the element with the highest priority. |
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93 * |
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94 * This function will generate an assertion error if the pq is |
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95 * empty. |
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96 * |
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97 * @return A const reference to the highest priority element. |
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98 */ |
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99 const value_type getPriorityElement(void) const { |
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100 |
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101 assert(!empty()); |
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102 |
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103 return m_elements.front(); |
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104 |
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105 } |
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106 |
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107 /** Determines whether the queue is currently empty. |
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108 * |
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109 * @return true if it is empty, false otherwise. |
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110 */ |
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111 bool empty(void) const { |
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112 return m_elements.empty(); |
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113 } |
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114 |
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115 /** Returns the current size of the queue. |
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116 * |
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117 */ |
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118 size_t size(void) const { |
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119 return m_elements.size(); |
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120 } |
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121 private: |
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122 typedef std::list<value_type> ElementList; |
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123 typedef typename ElementList::iterator ElementListIt; |
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124 typedef typename ElementList::const_iterator ElementListConstIt; |
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125 |
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126 //A list of valuetype pairs that represents the pq. |
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127 ElementList m_elements; |
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128 |
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129 //The order to use when sorting the pq. |
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130 Ordering m_ordering; |
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131 |
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132 /** Orders a PQ element up the list. |
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133 * |
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134 * @param i An iterator representing the element in the list to be sorted up. |
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135 */ |
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136 void orderUp(ElementListIt i); |
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137 /** Orders a PQ element up the list. |
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138 * |
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139 * @param entry A const reference to a value_type which represents the element to be added to the |
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140 * pq. |
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141 */ |
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142 void orderUp(const value_type& entry); |
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143 |
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144 /** Orders a PQ element down the list. |
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145 * |
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146 * @param An iterator representing the element in the PQ to order down. |
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147 */ |
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148 void orderDown(ElementListIt i); |
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149 |
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150 /** Retrieves the iterator to the element with the given index. |
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151 * |
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152 * @param index A const reference to the index to find. |
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153 */ |
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154 ElementListIt getElementIterator(const index_type& index) { |
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155 |
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156 for(ElementListIt i = m_elements.begin(); i != m_elements.end(); ++i) { |
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157 if(i->first == index) { |
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158 return i; |
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159 } |
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160 } |
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161 |
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162 return m_elements.end(); |
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163 |
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164 } |
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165 |
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166 /** The comparison function, used to compare two elements. |
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167 * |
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168 * @param a The l-operand of the comparison operation. |
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169 * @param b The r-operand of the comparison operation. |
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170 * @return An integer representing the result of the comparison operation. 1 being a is greather than b, |
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171 * -1 being a is less than b and 0 meaning that they're equal. |
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172 */ |
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173 int compare(const value_type& a, const value_type& b); |
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174 }; |
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175 } |
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176 |
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177 template<typename index_type, typename priority_type> |
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178 void FIFE::PriorityQueue<index_type, priority_type>::pushElement(const value_type& element) { |
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179 if(empty()) { |
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180 m_elements.push_front(element); |
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181 } |
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182 else { |
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183 orderUp(element); |
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184 } |
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185 } |
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186 |
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187 template<typename index_type, typename priority_type> |
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188 void FIFE::PriorityQueue<index_type, priority_type>::popElement(void) { |
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189 |
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190 if(!empty()) { |
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191 m_elements.pop_front(); |
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192 } |
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193 |
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194 } |
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195 |
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196 template<typename index_type, typename priority_type> |
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197 bool FIFE::PriorityQueue<index_type, priority_type>::changeElementPriority(const index_type& index, const priority_type& newPriority) { |
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198 |
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199 ElementListIt i = getElementIterator(index); |
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200 |
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201 if(i == m_elements.end()) { |
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202 return false; |
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203 } |
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204 |
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205 int compare_res = compare(value_type(index, newPriority), (*i)); |
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206 |
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207 i->second = newPriority; |
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208 |
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209 if(compare_res > 0 && i != m_elements.begin()) { |
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210 orderDown(i); |
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211 } else if(compare_res < 0) { |
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212 orderUp(i); |
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213 } |
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214 |
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215 return true; |
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216 |
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217 } |
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218 |
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219 template<typename index_type, typename priority_type> |
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* Datasets becomes the new trunk and retires after that :-)
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220 void FIFE::PriorityQueue<index_type, priority_type>::clear(void) { |
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221 |
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222 m_elements.clear(); |
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223 |
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224 } |
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225 |
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226 template<typename index_type, typename priority_type> |
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227 void FIFE::PriorityQueue<index_type, priority_type>::orderUp(ElementListIt i) { |
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228 |
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229 assert(i != m_elements.end() && L"Invalid iterator passed to function"); |
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230 |
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231 value_type vt = (*i); |
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232 |
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233 i = m_elements.erase(i); |
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* Datasets becomes the new trunk and retires after that :-)
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234 |
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* Datasets becomes the new trunk and retires after that :-)
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235 while(i != m_elements.end()) { |
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* Datasets becomes the new trunk and retires after that :-)
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236 |
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237 if(compare(vt, (*i)) > 0) { |
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* Datasets becomes the new trunk and retires after that :-)
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238 |
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239 m_elements.insert(i, vt); |
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* Datasets becomes the new trunk and retires after that :-)
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240 |
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* Datasets becomes the new trunk and retires after that :-)
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241 return; |
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* Datasets becomes the new trunk and retires after that :-)
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242 } |
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* Datasets becomes the new trunk and retires after that :-)
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243 |
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* Datasets becomes the new trunk and retires after that :-)
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244 ++i; |
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* Datasets becomes the new trunk and retires after that :-)
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245 } |
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* Datasets becomes the new trunk and retires after that :-)
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246 |
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247 m_elements.push_back(vt); |
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248 |
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249 } |
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250 |
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* Datasets becomes the new trunk and retires after that :-)
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|
251 template<class index_type, class priority_type> |
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* Datasets becomes the new trunk and retires after that :-)
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252 void FIFE::PriorityQueue<index_type, priority_type>::orderUp(const value_type& val) |
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* Datasets becomes the new trunk and retires after that :-)
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253 { |
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254 for(ElementListIt i = m_elements.begin(); i != m_elements.end(); ++i) |
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* Datasets becomes the new trunk and retires after that :-)
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255 { |
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* Datasets becomes the new trunk and retires after that :-)
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|
256 assert(val.first != i->first); |
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* Datasets becomes the new trunk and retires after that :-)
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257 |
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* Datasets becomes the new trunk and retires after that :-)
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|
258 if(compare(val, (*i)) > 0) |
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* Datasets becomes the new trunk and retires after that :-)
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|
259 { |
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* Datasets becomes the new trunk and retires after that :-)
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|
260 assert(val.first != i->first); |
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* Datasets becomes the new trunk and retires after that :-)
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|
261 |
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* Datasets becomes the new trunk and retires after that :-)
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|
262 m_elements.insert(i, val); |
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* Datasets becomes the new trunk and retires after that :-)
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|
263 |
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* Datasets becomes the new trunk and retires after that :-)
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|
264 return; |
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* Datasets becomes the new trunk and retires after that :-)
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|
265 } |
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* Datasets becomes the new trunk and retires after that :-)
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|
266 } |
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* Datasets becomes the new trunk and retires after that :-)
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|
267 |
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* Datasets becomes the new trunk and retires after that :-)
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|
268 m_elements.push_back(val); |
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* Datasets becomes the new trunk and retires after that :-)
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|
269 } |
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* Datasets becomes the new trunk and retires after that :-)
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|
270 |
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* Datasets becomes the new trunk and retires after that :-)
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|
271 template<typename index_type, typename priority_type> |
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* Datasets becomes the new trunk and retires after that :-)
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|
272 void FIFE::PriorityQueue<index_type, priority_type>::orderDown(ElementListIt i) { |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
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|
273 |
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* Datasets becomes the new trunk and retires after that :-)
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|
274 assert(i != m_elements.end()); |
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* Datasets becomes the new trunk and retires after that :-)
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275 |
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* Datasets becomes the new trunk and retires after that :-)
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|
276 value_type vt = (*i); |
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* Datasets becomes the new trunk and retires after that :-)
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|
277 |
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* Datasets becomes the new trunk and retires after that :-)
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|
278 i = m_elements.erase(i); |
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* Datasets becomes the new trunk and retires after that :-)
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|
279 |
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* Datasets becomes the new trunk and retires after that :-)
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|
280 if(i == m_elements.end()) { |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
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parents:
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|
281 --i; |
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* Datasets becomes the new trunk and retires after that :-)
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|
282 } |
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* Datasets becomes the new trunk and retires after that :-)
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|
283 |
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* Datasets becomes the new trunk and retires after that :-)
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changeset
|
284 ElementListIt j = i; |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
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|
285 |
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* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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|
286 ++j; |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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|
287 |
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* Datasets becomes the new trunk and retires after that :-)
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changeset
|
288 while(i != m_elements.begin()) { |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
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parents:
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|
289 if(compare(vt, (*i)) < 0) { |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
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|
290 |
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* Datasets becomes the new trunk and retires after that :-)
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changeset
|
291 m_elements.insert(j, vt); |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
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|
292 |
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* Datasets becomes the new trunk and retires after that :-)
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changeset
|
293 return; |
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* Datasets becomes the new trunk and retires after that :-)
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parents:
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|
294 } |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
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|
295 |
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* Datasets becomes the new trunk and retires after that :-)
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|
296 --i; |
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* Datasets becomes the new trunk and retires after that :-)
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|
297 --j; |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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|
298 } |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
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|
299 |
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* Datasets becomes the new trunk and retires after that :-)
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changeset
|
300 m_elements.push_front(vt); |
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
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parents:
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|
301 } |
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* Datasets becomes the new trunk and retires after that :-)
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302 |
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* Datasets becomes the new trunk and retires after that :-)
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303 template<typename index_type, typename priority_type> |
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* Datasets becomes the new trunk and retires after that :-)
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304 int FIFE::PriorityQueue<index_type, priority_type>::compare(const value_type& a, const value_type& b) { |
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* Datasets becomes the new trunk and retires after that :-)
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305 |
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* Datasets becomes the new trunk and retires after that :-)
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306 if(m_ordering == Descending) { |
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* Datasets becomes the new trunk and retires after that :-)
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307 |
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* Datasets becomes the new trunk and retires after that :-)
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308 if(a.second > b.second) { |
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* Datasets becomes the new trunk and retires after that :-)
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309 return 1; |
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* Datasets becomes the new trunk and retires after that :-)
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310 } else if(b.second > a.second) { |
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* Datasets becomes the new trunk and retires after that :-)
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311 return -1; |
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* Datasets becomes the new trunk and retires after that :-)
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312 } |
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* Datasets becomes the new trunk and retires after that :-)
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313 |
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* Datasets becomes the new trunk and retires after that :-)
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314 } else { |
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* Datasets becomes the new trunk and retires after that :-)
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315 |
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* Datasets becomes the new trunk and retires after that :-)
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316 if(a.second < b.second) { |
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* Datasets becomes the new trunk and retires after that :-)
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317 return 1; |
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* Datasets becomes the new trunk and retires after that :-)
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318 } else if(b.second < a.second) { |
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* Datasets becomes the new trunk and retires after that :-)
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319 return -1; |
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* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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320 } |
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* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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321 } |
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* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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322 |
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* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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323 return 0; |
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* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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324 } |
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* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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325 |
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* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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326 #endif |