annotate CircularQueue.c @ 73:32757e494675

Fixed bug that sets the wrong variable for fading in Pause. There still seems to be another bug related to fading though based on Johnson Lin's test case. Audio no longer stops and triggers the completion callback, but the volume doesn't seem to go up to max for long fade-ins. Still investigating.
author Eric Wing <ewing . public |-at-| gmail . com>
date Fri, 10 Aug 2012 22:53:14 -0700
parents 279d0427ef26
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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
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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
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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