1 | /* |
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2 | * ORXONOX - the hottest 3D action shooter ever to exist |
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3 | * > www.orxonox.net < |
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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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29 | /** |
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30 | @file IteratorBase.h |
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31 | @brief Definition and implementation of the Iterator class. |
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32 | |
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33 | The Iterator of a given class allows to iterate through an ObjectListBase, containing all objects of that type. |
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34 | This is the only way to access the objects stored in an ObjectListBase. |
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35 | */ |
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36 | |
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37 | #ifndef _IteratorBase_H__ |
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38 | #define _IteratorBase_H__ |
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39 | |
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40 | #include "CorePrereqs.h" |
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41 | |
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42 | #include "ObjectListBase.h" |
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43 | |
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44 | namespace orxonox |
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45 | { |
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46 | //! The IteratorBase allows to iterate through an ObjectListBase |
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47 | class _CoreExport IteratorBase |
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48 | { |
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49 | public: |
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50 | /** |
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51 | @brief Default Constructor: Sets the element to zero. |
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52 | */ |
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53 | inline IteratorBase() |
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54 | { |
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55 | this->element_ = 0; |
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56 | } |
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57 | |
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58 | /** |
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59 | @brief Constructor: Sets the element, whereon the iterator points, to a given element. |
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60 | @param element The element to start with |
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61 | */ |
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62 | inline IteratorBase(ObjectListBaseElement* element) |
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63 | { |
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64 | this->element_ = element; |
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65 | } |
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66 | |
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67 | /** |
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68 | @brief Constructor: Sets this element to the element of the other IteratorBase. |
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69 | @param other The other IteratorBase |
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70 | */ |
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71 | inline IteratorBase(const IteratorBase& other) |
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72 | { |
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73 | this->element_ = other.element_; |
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74 | } |
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75 | |
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76 | /** |
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77 | @brief Assigns the element of another IteratorBase. |
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78 | @param element The other IteratorBase |
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79 | */ |
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80 | inline IteratorBase operator=(const IteratorBase& other) |
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81 | { |
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82 | this->element_ = other.element_; |
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83 | return (*this); |
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84 | } |
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85 | |
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86 | /** |
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87 | @brief Overloading of the ++it operator: IteratorBase points to the next object in the list. |
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88 | @return The IteratorBase itself |
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89 | */ |
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90 | inline IteratorBase operator++() |
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91 | { |
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92 | if (this->element_) |
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93 | this->element_ = this->element_->next_; |
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94 | return (*this); |
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95 | } |
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96 | |
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97 | /** |
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98 | @brief Overloading of the it++ operator: IteratorBase points to the next object in the list. |
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99 | @return The IteratorBase itself |
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100 | */ |
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101 | inline IteratorBase operator++(int i) |
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102 | { |
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103 | IteratorBase copy = *this; |
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104 | if (this->element_) |
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105 | this->element_ = this->element_->next_; |
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106 | return copy; |
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107 | } |
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108 | |
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109 | /** |
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110 | @brief Overloading of the --it operator: IteratorBase points to the previous object in the list. |
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111 | @return The IteratorBase itself |
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112 | */ |
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113 | inline IteratorBase operator--() |
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114 | { |
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115 | if (this->element_) |
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116 | this->element_ = this->element_->prev_; |
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117 | return (*this); |
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118 | } |
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119 | |
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120 | /** |
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121 | @brief Overloading of the it-- operator: IteratorBase points to the previous object in the list. |
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122 | @return The IteratorBase itself |
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123 | */ |
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124 | inline IteratorBase operator--(int i) |
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125 | { |
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126 | IteratorBase copy = *this; |
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127 | if (this->element_) |
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128 | this->element_ = this->element_->prev_; |
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129 | return copy; |
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130 | } |
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131 | |
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132 | /** |
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133 | @brief Overloading of the *it operator: returns the pointer to the object. |
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134 | @return The object the IteratorBase points at |
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135 | */ |
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136 | inline OrxonoxClass* operator*() |
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137 | { |
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138 | if (this->element_) |
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139 | return this->element_->object_; |
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140 | else |
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141 | return 0; |
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142 | } |
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143 | |
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144 | /** |
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145 | @brief Overloading of the it-> operator: returns the pointer to the object. |
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146 | @return The object the IteratorBase points at |
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147 | */ |
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148 | inline OrxonoxClass* operator->() const |
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149 | { |
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150 | if (this->element_) |
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151 | return this->element_->object_; |
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152 | else |
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153 | return 0; |
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154 | } |
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155 | |
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156 | /** |
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157 | @brief Overloading of the typecast-operator to bool: returns true if the iterator points to an existing object. |
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158 | @return True if the IteratorBase points to an existing object. |
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159 | */ |
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160 | inline operator bool() |
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161 | { |
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162 | return (this->element_ != 0); |
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163 | } |
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164 | |
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165 | /** |
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166 | @brief Overloading of the == operator to compare with another IteratorBase. |
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167 | @param compare The other IteratorBase |
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168 | @return True if the iterators point to the same element |
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169 | */ |
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170 | inline bool operator==(const IteratorBase& compare) |
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171 | { |
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172 | return (this->element_ == compare.element_); |
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173 | } |
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174 | |
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175 | /** |
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176 | @brief Overloading of the != operator to compare with another IteratorBase. |
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177 | @param compare The other IteratorBase |
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178 | @return True if the iterators point to different elements |
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179 | */ |
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180 | inline bool operator!=(const IteratorBase& compare) |
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181 | { |
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182 | return (this->element_ != compare.element_); |
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183 | } |
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184 | |
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185 | protected: |
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186 | ObjectListBaseElement* element_; //!< The element the Iterator points at |
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187 | }; |
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188 | } |
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189 | |
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190 | #endif /* _IteratorBase_H__ */ |
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