Mercurial > almixer_isolated

annotate LinkedList.c @ 19:a8d96c934e77

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Reverted linked list.
author Eric Wing <ewing . public |-at-| gmail . com>
date Sun, 07 Nov 2010 05:20:21 -0800
parents d58eb38c771b
children 14c22fc3c753
rev   line source
13
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
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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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138 LinkedListNode* head_node;
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139 void* return_data;
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140
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141 if(NULL == linked_list)
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142 {
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143 return 0;
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144 }
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145 if(0 == linked_list->currentSize)
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146 {
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147 return NULL;
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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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155 LinkedList_Clear(linked_list);
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156 }
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157 else
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158 {
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159 LinkedListNode* next_node = head_node->nextNode;
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
160 next_node->previousNode = NULL;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
161 LinkedListNode_Free(head_node);
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
162 linked_list->headPtr = next_node;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
163 linked_list->currentSize = linked_list->currentSize - 1;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
164
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
165 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
166 return return_data;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
167 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
168
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
169 void* LinkedList_PopBack(LinkedList* linked_list)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
170 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
171 LinkedListNode* tail_node;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
172 void* return_data;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
173
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
174 if(NULL == linked_list)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
175 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
176 return NULL;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
177 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
178 if(0 == linked_list->currentSize)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
179 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
180 return NULL;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
181 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
182
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
183 tail_node = linked_list->tailPtr;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
184 return_data = tail_node->dataPtr;
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
185
17
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
186 if(1 == linked_list->currentSize)
13
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
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187 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
188 LinkedList_Clear(linked_list);
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
189 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
190 else
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
191 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
192 LinkedListNode* previous_node = tail_node->previousNode;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
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193 previous_node->nextNode = NULL;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
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194 LinkedListNode_Free(tail_node);
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
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195 linked_list->tailPtr = previous_node;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
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196 linked_list->currentSize = linked_list->currentSize - 1;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
197 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
198 return return_data;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
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199 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
200
17
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
201
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
202 void* LinkedList_Front(LinkedList* linked_list)
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
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parents: 15
diff changeset
203 {
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
204 LinkedListNode* head_node;
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
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parents: 15
diff changeset
205 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
206
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
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 changeset
208 {
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
209 return 0;
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
210 }
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
211 if(0 == linked_list->currentSize)
d58eb38c771b 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 changeset
213 return NULL;
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
214 }
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
215
d58eb38c771b 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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Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
218
d58eb38c771b 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;
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
220 }
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
221
d58eb38c771b 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 {
d58eb38c771b 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 changeset
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 {
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
229 return NULL;
d58eb38c771b Needed new Front and Back (non-popping) functions for LinkedList.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 15
diff changeset
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)
d58eb38c771b 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
d58eb38c771b 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
54aa96ae8912 Added LinkedList class to project.
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 Added LinkedList class to project.
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 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
254 if(NULL == linked_list)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
255 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
256 return;
54aa96ae8912 Added LinkedList class to project.
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
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
259 LinkedListNode* current_node = linked_list->headPtr;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
260 LinkedListNode* next_node;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
261 while(NULL != current_node)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
262 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
263 next_node = current_node->nextNode;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
264 LinkedListNode_Free(current_node);
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
265 current_node = next_node;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
266 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
267 linked_list->headPtr = NULL;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
268 linked_list->tailPtr = NULL;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
269 linked_list->currentSize = 0;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
270 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
271
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
272 void* LinkedListNode_GetData(LinkedListNode* list_node)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
273 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
274 if(NULL == list_node)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
275 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
276 return NULL;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
277 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
278 return list_node->dataPtr;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
279 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
280
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
281 LinkedListNode* LinkedList_Find(LinkedList* linked_list, void* the_data, LinkedListNode* start_node)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
282 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
283 LinkedListNode* current_node;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
284 if(NULL == linked_list)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
285 {
15
b27f7ff5e44b Needed return NULL.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 13
diff changeset
286 return NULL;
13
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
287 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
288 if(NULL == start_node)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
289 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
290 start_node = linked_list->headPtr;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
291 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
292
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
293 for(current_node = start_node; NULL != current_node; current_node = current_node->nextNode)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
294 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
295 if(current_node->dataPtr == the_data)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
296 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
297 return current_node;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
298 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
299 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
300 return current_node;
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
301 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
302
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
303 /* Make sure your LinkedListNode is actually connected to the
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
304 * LinkedList instance you pass.
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
305 */
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
306 unsigned int LinkedList_Remove(LinkedList* linked_list, LinkedListNode* list_node)
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
307 {
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
308 LinkedListNode* previous_node;
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309 LinkedListNode* next_node;
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310 if(NULL == linked_list)
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311 {
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312 return 0;
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313 }
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314 if(NULL == list_node)
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315 {
54aa96ae8912 Added LinkedList class to project.
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316 return 0;
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317 }
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Eric Wing <ewing . public |-at-| gmail . com>
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318
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319 if(1 == linked_list->currentSize)
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320 {
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321 LinkedList_Clear(linked_list);
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322 }
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323 else if(list_node == linked_list->headPtr)
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324 {
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325 LinkedList_PopFront(linked_list);
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326 }
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327 else if(list_node == linked_list->tailPtr)
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328 {
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329 LinkedList_PopBack(linked_list);
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330 }
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331 else
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332 {
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333 previous_node = list_node->previousNode;
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334 next_node = list_node->nextNode;
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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335
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336 previous_node->nextNode = next_node;
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337 next_node->previousNode = previous_node;
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338 LinkedListNode_Free(list_node);
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parents:
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339
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340 linked_list->currentSize = linked_list->currentSize - 1;
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parents:
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341 }
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
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342
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
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343 return 1;
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parents:
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344
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
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345 }
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
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346
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
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347
54aa96ae8912 Added LinkedList class to project.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
348