Mercurial > almixer_isolated

annotate CircularQueue.c @ 20:9365e714fc4b

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Added SeekChannel, SeekSource. Fixed a return value bug in RewindSource.
author Eric Wing <ewing@anscamobile.com>
date Mon, 08 Nov 2010 22:19:47 -0800
parents 279d0427ef26
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0
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1 /*
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2 CircularQueue
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3 Copyright (C) 2002 Eric Wing
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 */
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19
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20 #include "CircularQueue.h"
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21 #include <stddef.h> /* for NULL */
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22 #include <stdlib.h> /* for malloc/free */
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23 #include <stdio.h> /* for debugging */
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24
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25 CircularQueueUnsignedInt* CircularQueueUnsignedInt_CreateQueue(unsigned int max_size)
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26 {
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27 CircularQueueUnsignedInt* ret_ptr;
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28 if(max_size < 1)
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29 {
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30 return NULL;
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31 }
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32 ret_ptr = (CircularQueueUnsignedInt*)malloc(sizeof(CircularQueueUnsignedInt));
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33 if(NULL == ret_ptr)
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34 {
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35 /* Out of memory */
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36 return NULL;
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37 }
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38 ret_ptr->internalQueue = (unsigned int*)malloc(sizeof(unsigned int) * max_size);
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39 if(NULL == ret_ptr->internalQueue)
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40 {
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41 /* Out of memory */
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42 free(ret_ptr);
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43 return NULL;
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44 }
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45 ret_ptr->maxSize = max_size;
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46 ret_ptr->currentSize = 0;
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47 ret_ptr->headIndex = 0;
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48 ret_ptr->tailIndex = 0;
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49
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50 return ret_ptr;
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51 }
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52
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53 void CircularQueueUnsignedInt_FreeQueue(CircularQueueUnsignedInt* queue)
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54 {
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55 if(NULL == queue)
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56 {
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57 return;
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58 }
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59
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60 free(queue->internalQueue);
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61 free(queue);
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62 }
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63
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64 /**
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65 * Returns 1 if successful, 0 if failure.
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66 */
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67 unsigned int CircularQueueUnsignedInt_PushBack(CircularQueueUnsignedInt* queue, unsigned int value)
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68 {
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69 // printf("pushBack: %d\n", value);
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70
0
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71 unsigned int temp_index;
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72 if(NULL == queue)
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73 {
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74 return 0;
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75 }
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76 if(queue->currentSize >= queue->maxSize)
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77 {
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78 printf("failed to pushBack: %d\n", value);
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79
0
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80 return 0;
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81 }
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82 temp_index = queue->tailIndex + 1;
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83 if(temp_index >= queue->maxSize)
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84 {
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85 /* need to wrap tail index around */
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86 temp_index = 0;
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87 }
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88 /* So with my implementation, the tail index actually points
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89 * to the slot right after the last value.
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90 * So we will enter the value in the current tail, and then increment
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91 * the tail.
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92 * Note that in a full queue, the head and tail will be the same (I think).
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93 */
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94 queue->internalQueue[queue->tailIndex] = value;
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95 queue->tailIndex = temp_index;
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96 queue->currentSize++;
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97
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98 return 1;
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99 }
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100
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101 /**
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102 * Returns 1 if successful, 0 if failure.
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103 */
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104 unsigned int CircularQueueUnsignedInt_PushFront(CircularQueueUnsignedInt* queue, unsigned int value)
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105 {
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106 unsigned int temp_index;
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107 if(NULL == queue)
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108 {
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109 return 0;
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110 }
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111 if(queue->currentSize >= queue->maxSize)
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112 {
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113 return 0;
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114 }
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115
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116 /* This check is needed to prevent the unsigned int from overflowing. */
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117 if(0 == queue->headIndex)
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118 {
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119 /* Need to wrap head index around */
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120 temp_index = queue->maxSize - 1;
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121 }
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122 else
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123 {
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124 temp_index = queue->headIndex - 1;
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125 }
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126 /* So unlike the tail, the head index actually points to the element
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127 * at the head, and not an element before (or after) the head.
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128 */
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129 queue->internalQueue[temp_index] = value;
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130 queue->headIndex = temp_index;
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131 queue->currentSize++;
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132 return 1;
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133 }
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134
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135 unsigned int CircularQueueUnsignedInt_PopFront(CircularQueueUnsignedInt* queue)
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136 {
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137 unsigned int temp_index;
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138 // printf("PopFront: %d, %d\n", queue->headIndex,queue->internalQueue[queue->headIndex] );
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139
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140 if(NULL == queue)
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141 {
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142 return 0;
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143 }
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144 if(queue->currentSize == 0)
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145 {
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146 return 0;
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147 }
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148 temp_index = queue->headIndex + 1;
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149 if(temp_index >= queue->maxSize)
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150 {
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151 /* need to wrap tail index around */
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152 temp_index = 0;
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153 }
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
154 queue->headIndex = temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
155 queue->currentSize--;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
156 return 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
157 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
158
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
159
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
160 unsigned int CircularQueueUnsignedInt_PopBack(CircularQueueUnsignedInt* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
161 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
162 unsigned int temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
163 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
164 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
165 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
166 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
167 if(queue->currentSize == 0)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
168 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
169 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
170 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
171
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
172 /* This check is needed to prevent the unsigned int from overflowing. */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
173 if(0 == queue->tailIndex)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
174 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
175 temp_index = queue->maxSize - 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
176 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
177 else
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
178 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
179 temp_index = queue->tailIndex - 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
180 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
181
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
182 queue->tailIndex = temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
183 queue->currentSize--;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
184 return 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
185 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
186
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
187 unsigned int CircularQueueUnsignedInt_Front(CircularQueueUnsignedInt* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
188 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
189 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
190 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
191 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
192 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
193 if(0 == queue->currentSize)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
194 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
195 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
196 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
197 return queue->internalQueue[queue->headIndex];
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
198 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
199
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
200
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
201 unsigned int CircularQueueUnsignedInt_Back(CircularQueueUnsignedInt* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
202 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
203 unsigned int temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
204 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
205 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
206 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
207 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
208 if(0 == queue->currentSize)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
209 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
210 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
211 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
212 if(0 == queue->tailIndex)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
213 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
214 /* need to wrap tail index around */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
215 temp_index = queue->maxSize-1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
216 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
217 else
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
218 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
219 temp_index = queue->tailIndex-1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
220 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
221
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
222 return queue->internalQueue[temp_index];
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
223 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
224
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
225 unsigned int CircularQueueUnsignedInt_Size(CircularQueueUnsignedInt* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
226 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
227 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
228 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
229 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
230 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
231 return queue->currentSize;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
232 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
233
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
234 unsigned int CircularQueueUnsignedInt_MaxSize(CircularQueueUnsignedInt* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
235 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
236 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
237 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
238 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
239 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
240 return queue->maxSize;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
241 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
242
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
243 void CircularQueueUnsignedInt_Clear(CircularQueueUnsignedInt* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
244 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
245 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
246 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
247 return;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
248 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
249
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
250 queue->currentSize = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
251 queue->headIndex = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
252 queue->tailIndex = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
253 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
254
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
255 void CircularQueueUnsignedInt_Print(CircularQueueUnsignedInt* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
256 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
257 unsigned int i;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
258 unsigned int count;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
259 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
260 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
261 return;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
262 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
263 fprintf(stderr, "Queue: ");
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
264 for(count=0, i=queue->headIndex; count<queue->currentSize; count++, i++)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
265 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
266 if(i >= queue->maxSize)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
267 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
268 i=0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
269 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
270 fprintf(stderr, "%d ", queue->internalQueue[i]);
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
271 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
272 fprintf(stderr, "\n");
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
273 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
274
1
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
275 unsigned int CircularQueueUnsignedInt_ValueAtIndex(CircularQueueUnsignedInt* queue, unsigned int the_index)
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
276 {
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
277 unsigned int i;
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
278 if(NULL == queue)
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
279 {
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
280 return 0;
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
281 }
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
282 if(the_index >= queue->currentSize)
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
283 {
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
284 return 0;
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
285 }
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
286 i = (queue->headIndex + the_index) % queue->currentSize;
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
287 // fprintf(stderr, "%d\n", queue->internalQueue[i]);
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
288 return queue->internalQueue[i];
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
289 }
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
290
0
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
291 /*
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
292 * Implementation for void* version starts here.
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
293 */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
294
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
295 CircularQueueVoid* CircularQueueVoid_CreateQueue(unsigned int max_size)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
296 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
297 CircularQueueVoid* ret_ptr;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
298 if(max_size < 1)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
299 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
300 return NULL;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
301 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
302 ret_ptr = (CircularQueueVoid*)malloc(sizeof(CircularQueueVoid));
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
303 if(NULL == ret_ptr)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
304 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
305 /* Out of memory */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
306 return NULL;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
307 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
308 ret_ptr->internalQueue = (void**)malloc(sizeof(void*) * max_size);
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
309 if(NULL == ret_ptr->internalQueue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
310 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
311 /* Out of memory */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
312 free(ret_ptr);
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
313 return NULL;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
314 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
315 ret_ptr->maxSize = max_size;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
316 ret_ptr->currentSize = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
317 ret_ptr->headIndex = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
318 ret_ptr->tailIndex = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
319
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
320 return ret_ptr;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
321 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
322
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
323 void CircularQueueVoid_FreeQueue(CircularQueueVoid* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
324 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
325 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
326 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
327 return;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
328 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
329
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
330 free(queue->internalQueue);
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
331 free(queue);
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
332 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
333
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
334 /**
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
335 * Returns 1 if successful, 0 if failure.
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
336 */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
337 unsigned int CircularQueueVoid_PushBack(CircularQueueVoid* queue, void* value)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
338 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
339 unsigned int temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
340 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
341 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
342 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
343 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
344 if(queue->currentSize >= queue->maxSize)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
345 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
346 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
347 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
348 temp_index = queue->tailIndex + 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
349 if(temp_index >= queue->maxSize)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
350 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
351 /* need to wrap tail index around */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
352 temp_index = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
353 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
354 queue->internalQueue[queue->tailIndex] = value;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
355 queue->tailIndex = temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
356 queue->currentSize++;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
357
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
358 return 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
359 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
360
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
361 /**
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
362 * Returns 1 if successful, 0 if failure.
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
363 */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
364 unsigned int CircularQueueVoid_PushFront(CircularQueueVoid* queue, void* value)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
365 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
366 unsigned int temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
367 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
368 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
369 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
370 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
371 if(queue->currentSize >= queue->maxSize)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
372 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
373 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
374 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
375
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
376 /* This check is needed to prevent the unsigned int from overflowing. */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
377 if(0 == queue->headIndex)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
378 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
379 /* Need to wrap head index around */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
380 temp_index = queue->maxSize - 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
381 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
382 else
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
383 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
384 temp_index = queue->headIndex - 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
385 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
386 queue->internalQueue[temp_index] = value;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
387 queue->headIndex = temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
388 queue->currentSize++;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
389 return 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
390 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
391
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
392 unsigned int CircularQueueVoid_PopFront(CircularQueueVoid* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
393 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
394 unsigned int temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
395 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
396 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
397 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
398 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
399 if(queue->currentSize == 0)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
400 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
401 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
402 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
403 temp_index = queue->headIndex + 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
404 if(temp_index >= queue->maxSize)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
405 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
406 /* need to wrap tail index around */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
407 temp_index = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
408 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
409 queue->headIndex = temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
410 queue->currentSize--;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
411 return 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
412 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
413
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
414
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
415 unsigned int CircularQueueVoid_PopBack(CircularQueueVoid* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
416 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
417 unsigned int temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
418 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
419 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
420 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
421 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
422 if(queue->currentSize == 0)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
423 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
424 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
425 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
426
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
427 /* This check is needed to prevent the unsigned int from overflowing. */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
428 if(0 == queue->tailIndex)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
429 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
430 temp_index = queue->maxSize - 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
431 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
432 else
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
433 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
434 temp_index = queue->tailIndex - 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
435 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
436
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
437 queue->tailIndex = temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
438 queue->currentSize--;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
439 return 1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
440 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
441
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
442 void* CircularQueueVoid_Front(CircularQueueVoid* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
443 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
444 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
445 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
446 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
447 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
448 if(0 == queue->currentSize)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
449 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
450 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
451 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
452 return queue->internalQueue[queue->headIndex];
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
453 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
454
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
455
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
456 void* CircularQueueVoid_Back(CircularQueueVoid* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
457 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
458 unsigned int temp_index;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
459 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
460 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
461 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
462 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
463 if(0 == queue->currentSize)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
464 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
465 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
466 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
467 if(0 == queue->tailIndex)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
468 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
469 /* need to wrap tail index around */
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
470 temp_index = queue->maxSize-1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
471 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
472 else
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
473 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
474 temp_index = queue->tailIndex-1;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
475 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
476
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
477 return queue->internalQueue[temp_index];
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
478 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
479
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
480 unsigned int CircularQueueVoid_Size(CircularQueueVoid* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
481 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
482 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
483 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
484 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
485 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
486 return queue->currentSize;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
487 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
488
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
489 unsigned int CircularQueueVoid_MaxSize(CircularQueueVoid* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
490 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
491 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
492 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
493 return 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
494 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
495 return queue->maxSize;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
496 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
497
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
498 void CircularQueueVoid_Clear(CircularQueueVoid* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
499 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
500 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
501 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
502 return;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
503 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
504
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
505 queue->currentSize = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
506 queue->headIndex = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
507 queue->tailIndex = 0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
508 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
509
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
510 void CircularQueueVoid_Print(CircularQueueVoid* queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
511 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
512 unsigned int i;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
513 unsigned int count;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
514 if(NULL == queue)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
515 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
516 return;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
517 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
518 fprintf(stderr, "Queue: ");
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
519 for(count=0, i=queue->headIndex; count<queue->currentSize; count++, i++)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
520 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
521 if(i >= queue->maxSize)
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
522 {
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
523 i=0;
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
524 }
1
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
525 fprintf(stderr, "%x ", (unsigned int)queue->internalQueue[i]);
0
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
526 }
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
527 fprintf(stderr, "\n");
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
528 }
1
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
529
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
530 void* CircularQueueVoid_ValueAtIndex(CircularQueueVoid* queue, unsigned int the_index)
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
531 {
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
532 unsigned int i;
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
533 if(NULL == queue)
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
534 {
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
535 return NULL;
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
536 }
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
537 if(the_index >= queue->currentSize)
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
538 {
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
539 return NULL;
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
540 }
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
541 i = (queue->headIndex + the_index) % queue->currentSize;
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
542 // fprintf(stderr, "%d\n", queue->internalQueue[i]);
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
543 return queue->internalQueue[i];
a8a8fe374984 Subversion era
Eric Wing <ewing . public |-at-| gmail . com>
parents: 0
diff changeset
544 }
0
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
545
01e39f9f58d5 Bitkeeper era.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
546