Mercurial > almixer_isolated
annotate LinkedList.c @ 60:f7acef5a80fe
Bug and casting fixes to SimpleThreadWindows.c. Thanks to Johnson Lin for testing and reporting these issues!
Johnson Lin < arch . jslin - at - gmail . com >
author | Eric Wing <ewing . public |-at-| gmail . com> |
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date | Tue, 19 Jun 2012 00:23:35 -0700 |
parents | 14c22fc3c753 |
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rev | line source |
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1 #include "LinkedList.h" |
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2 #include <stddef.h> /* for NULL */ |
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3 #include <stdlib.h> /* for malloc/free */ |
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4 #include <stdio.h> /* for debugging */ |
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5 |
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6 struct LinkedListNode |
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7 { |
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8 LinkedListNode* nextNode; |
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9 LinkedListNode* previousNode; |
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10 void* dataPtr; |
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11 }; |
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12 |
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13 struct LinkedList |
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14 { |
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15 size_t currentSize; |
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16 LinkedListNode* headPtr; |
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17 LinkedListNode* tailPtr; |
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18 }; |
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19 |
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20 |
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21 LinkedListNode* LinkedListNode_Create() |
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22 { |
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23 LinkedListNode* list_node; |
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24 list_node = (LinkedListNode*)calloc(1, sizeof(LinkedListNode)); |
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25 if(NULL == list_node) |
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26 { |
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27 /* Very bad, but not sure what to do here. */ |
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28 return NULL; |
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29 } |
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30 |
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31 return list_node; |
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32 } |
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33 |
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34 |
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35 void LinkedListNode_Free(LinkedListNode* list_node) |
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36 { |
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37 if(NULL == list_node) |
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38 { |
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39 return; |
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40 } |
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41 free(list_node); |
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42 } |
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43 |
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44 |
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45 LinkedList* LinkedList_Create() |
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46 { |
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47 LinkedList* linked_list; |
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48 linked_list = (LinkedList*)calloc(1, sizeof(LinkedList)); |
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49 if(NULL == linked_list) |
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50 { |
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51 /* Very bad, but not sure what to do here. */ |
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52 return NULL; |
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53 } |
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54 |
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55 return linked_list; |
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56 } |
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57 |
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58 void LinkedList_Free(LinkedList* linked_list) |
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59 { |
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60 /* Both functions check for NULL */ |
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61 LinkedList_Clear(linked_list); |
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62 free(linked_list); |
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63 } |
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64 |
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65 |
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66 /** |
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67 * Returns 1 if successful, 0 if failure. |
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68 */ |
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69 unsigned int LinkedList_PushFront(LinkedList* linked_list, void* new_item) |
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70 { |
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71 LinkedListNode* new_node; |
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72 |
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73 if(NULL == linked_list) |
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74 { |
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75 return 0; |
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76 } |
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77 |
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78 new_node = LinkedListNode_Create(); |
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79 if(NULL == new_node) |
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80 { |
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81 return 0; |
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82 } |
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83 |
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84 new_node->dataPtr = new_item; |
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85 |
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86 if(0 == linked_list->currentSize) |
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87 { |
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88 linked_list->tailPtr = new_node; |
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89 } |
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90 else |
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91 { |
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92 LinkedListNode* head_node = linked_list->headPtr; |
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93 new_node->nextNode = head_node; |
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94 head_node->previousNode = new_node; |
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95 } |
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96 |
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97 linked_list->headPtr = new_node; |
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98 linked_list->currentSize++; |
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99 return 1; |
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100 } |
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101 |
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102 unsigned int LinkedList_PushBack(LinkedList* linked_list, void* new_item) |
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103 { |
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104 LinkedListNode* new_node; |
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105 |
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106 if(NULL == linked_list) |
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107 { |
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108 return 0; |
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109 } |
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110 |
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111 new_node = LinkedListNode_Create(); |
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112 if(NULL == new_node) |
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113 { |
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114 return 0; |
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115 } |
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116 |
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117 new_node->dataPtr = new_item; |
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118 |
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119 if(0 == linked_list->currentSize) |
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120 { |
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121 linked_list->headPtr = new_node; |
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122 } |
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123 else |
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124 { |
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125 LinkedListNode* tail_node = linked_list->tailPtr; |
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126 new_node->previousNode = tail_node; |
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127 tail_node->nextNode = new_node; |
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128 } |
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129 |
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130 linked_list->tailPtr = new_node; |
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131 linked_list->currentSize++; |
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132 return 1; |
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133 |
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134 } |
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135 |
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136 void* LinkedList_PopFront(LinkedList* linked_list) |
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|
137 { |
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parents:
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|
138 LinkedListNode* head_node; |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
139 void* return_data; |
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|
140 |
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parents:
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|
141 if(NULL == linked_list) |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
142 { |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
143 return 0; |
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parents:
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|
144 } |
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|
145 if(0 == linked_list->currentSize) |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
146 { |
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Eric Wing <ewing . public |-at-| gmail . com>
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|
147 return NULL; |
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parents:
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|
148 } |
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149 |
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|
150 head_node = linked_list->headPtr; |
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151 return_data = head_node->dataPtr; |
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152 |
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153 if(1 == linked_list->currentSize) |
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|
154 { |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
155 LinkedList_Clear(linked_list); |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
156 } |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
157 else |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
158 { |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
159 LinkedListNode* next_node = head_node->nextNode; |
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|
160 next_node->previousNode = NULL; |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
161 LinkedListNode_Free(head_node); |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
162 linked_list->headPtr = next_node; |
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|
163 linked_list->currentSize = linked_list->currentSize - 1; |
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|
164 |
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|
165 } |
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|
166 return return_data; |
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|
167 } |
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|
168 |
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|
169 void* LinkedList_PopBack(LinkedList* linked_list) |
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|
170 { |
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Eric Wing <ewing . public |-at-| gmail . com>
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|
171 LinkedListNode* tail_node; |
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parents:
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|
172 void* return_data; |
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|
173 |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
174 if(NULL == linked_list) |
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|
175 { |
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|
176 return NULL; |
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|
177 } |
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Eric Wing <ewing . public |-at-| gmail . com>
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|
178 if(0 == linked_list->currentSize) |
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|
179 { |
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Eric Wing <ewing . public |-at-| gmail . com>
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|
180 return NULL; |
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|
181 } |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
182 |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
183 tail_node = linked_list->tailPtr; |
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|
184 return_data = tail_node->dataPtr; |
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|
185 |
17
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
186 if(1 == linked_list->currentSize) |
13
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Eric Wing <ewing . public |-at-| gmail . com>
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|
187 { |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
188 LinkedList_Clear(linked_list); |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
189 } |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
190 else |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
191 { |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
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|
192 LinkedListNode* previous_node = tail_node->previousNode; |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
193 previous_node->nextNode = NULL; |
54aa96ae8912
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
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|
194 LinkedListNode_Free(tail_node); |
54aa96ae8912
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
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|
195 linked_list->tailPtr = previous_node; |
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Eric Wing <ewing . public |-at-| gmail . com>
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|
196 linked_list->currentSize = linked_list->currentSize - 1; |
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|
197 } |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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|
198 return return_data; |
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parents:
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|
199 } |
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
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|
200 |
17
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
201 |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
202 void* LinkedList_Front(LinkedList* linked_list) |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
203 { |
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Needed new Front and Back (non-popping) functions for LinkedList.
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parents:
15
diff
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|
204 LinkedListNode* head_node; |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
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15
diff
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|
205 void* return_data; |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
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15
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|
206 |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
207 if(NULL == linked_list) |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
208 { |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
209 return 0; |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
210 } |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
211 if(0 == linked_list->currentSize) |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
212 { |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
213 return NULL; |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
214 } |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
215 |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
216 head_node = linked_list->headPtr; |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
217 return_data = head_node->dataPtr; |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
218 |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
219 return return_data; |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
220 } |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
221 |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
222 void* LinkedList_Back(LinkedList* linked_list) |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
223 { |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
224 LinkedListNode* tail_node; |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
225 void* return_data; |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
226 |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
227 if(NULL == linked_list) |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
228 { |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
229 return NULL; |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
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|
230 } |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
231 if(0 == linked_list->currentSize) |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
232 { |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
233 return NULL; |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
234 } |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
235 |
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Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
236 tail_node = linked_list->tailPtr; |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
237 return_data = tail_node->dataPtr; |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
238 |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
239 return return_data; |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
240 } |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
241 |
d58eb38c771b
Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
15
diff
changeset
|
242 |
13
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
243 size_t LinkedList_Size(LinkedList* linked_list) |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
244 { |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
245 if(NULL == linked_list) |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
246 { |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
247 return 0; |
54aa96ae8912
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
248 } |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
249 return linked_list->currentSize; |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
250 } |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
251 |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
252 void LinkedList_Clear(LinkedList* linked_list) |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
253 { |
21
14c22fc3c753
Fix to LinkedList_Clear
Eric Wing <ewing . public |-at-| gmail . com>
parents:
17
diff
changeset
|
254 LinkedListNode* current_node; |
14c22fc3c753
Fix to LinkedList_Clear
Eric Wing <ewing . public |-at-| gmail . com>
parents:
17
diff
changeset
|
255 LinkedListNode* next_node; |
13
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
256 if(NULL == linked_list) |
54aa96ae8912
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
257 { |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
258 return; |
54aa96ae8912
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
259 } |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
260 |
21
14c22fc3c753
Fix to LinkedList_Clear
Eric Wing <ewing . public |-at-| gmail . com>
parents:
17
diff
changeset
|
261 current_node = linked_list->headPtr; |
13
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
262 while(NULL != current_node) |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
263 { |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
|
264 next_node = current_node->nextNode; |
54aa96ae8912
Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff
changeset
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265 LinkedListNode_Free(current_node); |
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266 current_node = next_node; |
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267 } |
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268 linked_list->headPtr = NULL; |
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269 linked_list->tailPtr = NULL; |
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270 linked_list->currentSize = 0; |
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271 } |
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272 |
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273 void* LinkedListNode_GetData(LinkedListNode* list_node) |
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274 { |
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275 if(NULL == list_node) |
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276 { |
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277 return NULL; |
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278 } |
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279 return list_node->dataPtr; |
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280 } |
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281 |
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282 LinkedListNode* LinkedList_Find(LinkedList* linked_list, void* the_data, LinkedListNode* start_node) |
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283 { |
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284 LinkedListNode* current_node; |
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285 if(NULL == linked_list) |
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286 { |
15
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287 return NULL; |
13
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288 } |
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289 if(NULL == start_node) |
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290 { |
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291 start_node = linked_list->headPtr; |
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292 } |
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293 |
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294 for(current_node = start_node; NULL != current_node; current_node = current_node->nextNode) |
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295 { |
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296 if(current_node->dataPtr == the_data) |
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297 { |
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298 return current_node; |
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299 } |
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300 } |
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301 return current_node; |
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302 } |
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303 |
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304 /* Make sure your LinkedListNode is actually connected to the |
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305 * LinkedList instance you pass. |
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306 */ |
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307 unsigned int LinkedList_Remove(LinkedList* linked_list, LinkedListNode* list_node) |
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308 { |
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309 LinkedListNode* previous_node; |
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310 LinkedListNode* next_node; |
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311 if(NULL == linked_list) |
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312 { |
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313 return 0; |
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314 } |
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315 if(NULL == list_node) |
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316 { |
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317 return 0; |
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318 } |
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319 |
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320 if(1 == linked_list->currentSize) |
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321 { |
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322 LinkedList_Clear(linked_list); |
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323 } |
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324 else if(list_node == linked_list->headPtr) |
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325 { |
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326 LinkedList_PopFront(linked_list); |
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327 } |
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328 else if(list_node == linked_list->tailPtr) |
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329 { |
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330 LinkedList_PopBack(linked_list); |
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331 } |
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332 else |
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333 { |
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334 previous_node = list_node->previousNode; |
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335 next_node = list_node->nextNode; |
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336 |
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337 previous_node->nextNode = next_node; |
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338 next_node->previousNode = previous_node; |
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339 LinkedListNode_Free(list_node); |
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340 |
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341 linked_list->currentSize = linked_list->currentSize - 1; |
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342 } |
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343 |
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344 return 1; |
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345 |
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346 } |
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347 |
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348 |
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349 |