[790] | 1 | /* |
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| 2 | * ORXONOX - the hottest 3D action shooter ever to exist |
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[1056] | 3 | * > www.orxonox.net < |
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[790] | 4 | * |
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| 5 | * |
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| 6 | * License notice: |
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| 7 | * |
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| 8 | * This program is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU General Public License |
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| 10 | * as published by the Free Software Foundation; either version 2 |
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| 11 | * of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * This program is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | * GNU General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU General Public License |
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| 19 | * along with this program; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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| 21 | * |
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| 22 | * Author: |
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| 23 | * Fabian 'x3n' Landau |
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| 24 | * Co-authors: |
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| 25 | * ... |
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| 26 | * |
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| 27 | */ |
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| 28 | |
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[871] | 29 | /** |
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[790] | 30 | @file ObjectList.h |
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| 31 | @brief Definition and implementation of the ObjectList class. |
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| 32 | |
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| 33 | The ObjectList is a double-linked list, used by Identifiers to store all objects of a given class. |
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| 34 | Newly created objects are added through the RegisterObject-macro in its constructor. |
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| 35 | Use Iterator<class> to iterate through all objects of the class. |
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| 36 | */ |
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| 37 | |
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[197] | 38 | #ifndef _ObjectList_H__ |
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| 39 | #define _ObjectList_H__ |
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| 40 | |
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[790] | 41 | #include "CorePrereqs.h" |
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[1062] | 42 | |
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[790] | 43 | #include "Iterator.h" |
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[871] | 44 | #include "ClassManager.h" |
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[790] | 45 | |
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[197] | 46 | namespace orxonox |
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| 47 | { |
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[224] | 48 | // ############################### |
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| 49 | // ### ObjectListElement ### |
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| 50 | // ############################### |
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[790] | 51 | //! The list-element of the ObjectList |
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[224] | 52 | template <class T> |
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[197] | 53 | class ObjectListElement |
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| 54 | { |
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| 55 | public: |
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[224] | 56 | ObjectListElement(T* object); |
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[197] | 57 | |
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[790] | 58 | T* object_; //!< The object |
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| 59 | ObjectListElement* next_; //!< The next element in the list |
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| 60 | ObjectListElement* prev_; //!< The previous element in the list |
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[197] | 61 | }; |
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| 62 | |
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[790] | 63 | /** |
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| 64 | @brief Constructor: Creates the list-element with an object. |
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| 65 | @param object The object to store |
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| 66 | */ |
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[224] | 67 | template <class T> |
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| 68 | ObjectListElement<T>::ObjectListElement(T* object) |
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| 69 | { |
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| 70 | this->object_ = object; |
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| 71 | this->next_ = 0; |
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| 72 | this->prev_ = 0; |
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| 73 | } |
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| 74 | |
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| 75 | |
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| 76 | // ############################### |
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| 77 | // ### ObjectList ### |
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| 78 | // ############################### |
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[790] | 79 | //! The ObjectList contains all objects of a given class. |
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| 80 | /** |
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| 81 | The ObjectList is used by Identifiers to store all objects of a given class. |
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| 82 | Use Iterator<class> to iterate through all objects in the list. |
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| 83 | */ |
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[224] | 84 | template <class T> |
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[197] | 85 | class ObjectList |
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| 86 | { |
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| 87 | public: |
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[871] | 88 | ObjectList(); |
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| 89 | ~ObjectList(); |
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[790] | 90 | |
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[246] | 91 | ObjectListElement<T>* add(T* object); |
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[790] | 92 | // void remove(OrxonoxClass* object, bool bIterateForwards = true); |
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[197] | 93 | |
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[871] | 94 | /** @brief Returns the first element in the list. @return The first element */ |
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[248] | 95 | inline static Iterator<T> start() |
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[871] | 96 | { return Iterator<T>(ClassManager<T>::getIdentifier()->getObjects()->first_); } |
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[790] | 97 | |
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[871] | 98 | /** @brief Returns the first element in the list. @return The first element */ |
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[790] | 99 | inline static Iterator<T> begin() |
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[871] | 100 | { return Iterator<T>(ClassManager<T>::getIdentifier()->getObjects()->first_); } |
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[790] | 101 | |
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[871] | 102 | /** @brief Returns the last element in the list. @return The last element */ |
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[248] | 103 | inline static Iterator<T> end() |
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[871] | 104 | { return Iterator<T>(ClassManager<T>::getIdentifier()->getObjects()->last_); } |
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[248] | 105 | |
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[790] | 106 | ObjectListElement<T>* first_; //!< The first element in the list |
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| 107 | ObjectListElement<T>* last_; //!< The last element in the list |
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[197] | 108 | }; |
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[224] | 109 | |
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[790] | 110 | /** |
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| 111 | @brief Constructor: Sets default values. |
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| 112 | */ |
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[224] | 113 | template <class T> |
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| 114 | ObjectList<T>::ObjectList() |
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| 115 | { |
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| 116 | this->first_ = 0; |
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| 117 | this->last_ = 0; |
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| 118 | } |
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| 119 | |
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[790] | 120 | /** |
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| 121 | @brief Destructor: Deletes all list-elements, but NOT THE OBJECTS. |
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| 122 | */ |
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[224] | 123 | template <class T> |
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| 124 | ObjectList<T>::~ObjectList() |
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| 125 | { |
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| 126 | ObjectListElement<T>* temp; |
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| 127 | while (this->first_) |
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| 128 | { |
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| 129 | temp = this->first_->next_; |
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| 130 | delete this->first_; |
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| 131 | this->first_ = temp; |
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| 132 | } |
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| 133 | } |
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| 134 | |
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[790] | 135 | /** |
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| 136 | @brief Adds a new object to the end of the list. |
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| 137 | @param object The object to add |
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| 138 | @return The pointer to the new ObjectListElement, needed by the MetaObjectList of the added object |
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| 139 | */ |
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| 140 | template <class T> |
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[246] | 141 | ObjectListElement<T>* ObjectList<T>::add(T* object) |
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[224] | 142 | { |
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| 143 | if (!this->last_) |
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| 144 | { |
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[790] | 145 | // If the list is empty |
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[224] | 146 | this->last_ = new ObjectListElement<T>(object); |
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[790] | 147 | this->first_ = this->last_; // There's only one object in the list now |
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[224] | 148 | } |
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| 149 | else |
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| 150 | { |
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[790] | 151 | // If the list isn't empty |
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[224] | 152 | ObjectListElement<T>* temp = this->last_; |
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| 153 | this->last_ = new ObjectListElement<T>(object); |
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| 154 | this->last_->prev_ = temp; |
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| 155 | temp->next_ = this->last_; |
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| 156 | } |
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[246] | 157 | |
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| 158 | return this->last_; |
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[224] | 159 | } |
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| 160 | |
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[790] | 161 | |
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| 162 | // /** |
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| 163 | // @brief Removes an object from the list. |
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| 164 | // @param object The object to remove |
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| 165 | // @param bIterateForwards If true: Start searching the object at the beginning of the list |
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| 166 | // */ |
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| 167 | /* |
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[224] | 168 | template <class T> |
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| 169 | void ObjectList<T>::remove(OrxonoxClass* object, bool bIterateForwards) |
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| 170 | { |
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| 171 | if (!object || !this->first_ || !this->last_) |
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| 172 | return; |
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| 173 | |
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[790] | 174 | // If there's only one object in the list, we have to set first_ and last_ to zero |
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[224] | 175 | if (this->first_ == this->last_) |
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| 176 | { |
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| 177 | if (this->first_->object_ == object) |
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| 178 | { |
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| 179 | delete this->first_; |
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| 180 | this->first_ = 0; |
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| 181 | this->last_ = 0; |
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| 182 | } |
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| 183 | |
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| 184 | return; |
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| 185 | } |
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| 186 | |
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[790] | 187 | // Now we are sure we have more than one element in the list |
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[224] | 188 | if (bIterateForwards) |
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| 189 | { |
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[790] | 190 | // Start at the beginning of the list |
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| 191 | |
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| 192 | // Check if it's the first object |
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[224] | 193 | if (this->first_->object_ == object) |
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| 194 | { |
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| 195 | ObjectListElement<T>* temp = this->first_->next_; |
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| 196 | delete this->first_; |
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| 197 | this->first_ = temp; |
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| 198 | this->first_->prev_ = 0; |
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| 199 | |
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| 200 | return; |
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| 201 | } |
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| 202 | |
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[790] | 203 | // Iterate through the whole list |
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[224] | 204 | ObjectListElement<T>* temp = this->first_; |
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| 205 | while (temp->next_) |
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| 206 | { |
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| 207 | if (temp->next_->object_ == object) |
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| 208 | { |
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| 209 | ObjectListElement<T>* temp2 = temp->next_->next_; |
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| 210 | delete temp->next_; |
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| 211 | temp->next_ = temp2; |
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| 212 | if (temp2) |
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| 213 | temp2->prev_ = temp; |
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| 214 | else |
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[790] | 215 | this->last_ = temp; // If there is no next_, we deleted the last element and have to update the last_ pointer. |
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[224] | 216 | |
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| 217 | return; |
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| 218 | } |
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| 219 | |
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| 220 | temp = temp->next_; |
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| 221 | } |
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| 222 | } |
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| 223 | else |
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| 224 | { |
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[790] | 225 | // Start at the end of the list |
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| 226 | |
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| 227 | // Check if it's the last object |
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[224] | 228 | if (this->last_->object_ == object) |
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| 229 | { |
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| 230 | ObjectListElement<T>* temp = this->last_->prev_; |
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| 231 | delete this->last_; |
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| 232 | this->last_ = temp; |
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| 233 | this->last_->next_ = 0; |
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| 234 | |
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| 235 | return; |
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| 236 | } |
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| 237 | |
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[790] | 238 | // Iterate through the whole list |
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[224] | 239 | ObjectListElement<T>* temp = this->last_; |
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| 240 | while (temp->prev_) |
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| 241 | { |
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| 242 | if (temp->prev_->object_ == object) |
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| 243 | { |
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| 244 | ObjectListElement<T>* temp2 = temp->prev_->prev_; |
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| 245 | delete temp->prev_; |
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| 246 | temp->prev_ = temp2; |
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| 247 | if (temp2) |
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| 248 | temp2->next_ = temp; |
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| 249 | else |
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[790] | 250 | this->first_ = temp; // If there is no prev_, we deleted the first element and have to update the first_ pointer. |
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[224] | 251 | |
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| 252 | return; |
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| 253 | } |
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| 254 | |
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| 255 | temp = temp->prev_; |
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| 256 | } |
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| 257 | } |
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| 258 | } |
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[790] | 259 | */ |
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[197] | 260 | } |
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| 261 | |
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[790] | 262 | #endif /* _ObjectList_H__ */ |
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