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annotate xrogue/list.c @ 220:f54901b9c39b

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XRogue: convert to ANSI-style function declarations.
author John "Elwin" Edwards
date Wed, 02 Mar 2016 21:13:26 -0500
parents ce0cf824c192
children 0250220d8cdd
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1 /*
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2 list.c - Functions for dealing with linked lists of goodies
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3
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4 XRogue: Expeditions into the Dungeons of Doom
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5 Copyright (C) 1991 Robert Pietkivitch
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6 All rights reserved.
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7
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8 Based on "Advanced Rogue"
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9 Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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10 All rights reserved.
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11
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12 Based on "Rogue: Exploring the Dungeons of Doom"
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13 Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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14 All rights reserved.
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15
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16 See the file LICENSE.TXT for full copyright and licensing information.
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17 */
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18
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19 #include <stdlib.h>
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20 #include <string.h>
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21 #include <curses.h>
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22 #include "rogue.h"
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23
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24 void r_discard(struct linked_list *item);
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25 void t_discard(struct linked_list *item);
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26
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27 /*
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28 * detach:
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29 * Takes an item out of whatever linked list it might be in
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30 */
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31
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32 void
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33 _detach(struct linked_list **list, struct linked_list *item)
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34 {
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35 if (*list == item)
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36 *list = next(item);
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37 if (prev(item) != NULL) item->l_prev->l_next = next(item);
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38 if (next(item) != NULL) item->l_next->l_prev = prev(item);
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39 item->l_next = NULL;
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40 item->l_prev = NULL;
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41 }
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42
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43 /*
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44 * _attach:
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45 * add an item to the head of a list
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46 */
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47
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48 void
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49 _attach(struct linked_list **list, struct linked_list *item)
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50 {
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51 if (*list != NULL)
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52 {
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53 item->l_next = *list;
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54 (*list)->l_prev = item;
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55 item->l_prev = NULL;
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56 }
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57 else
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58 {
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59 item->l_next = NULL;
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60 item->l_prev = NULL;
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61 }
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62
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63 *list = item;
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64 }
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65
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66 /*
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67 * o_free_list:
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68 * Throw the whole object list away
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69 */
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70
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71 void
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72 _o_free_list(struct linked_list **ptr)
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73 {
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74 register struct linked_list *item;
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75
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76 while (*ptr != NULL)
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77 {
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78 item = *ptr;
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79 *ptr = next(item);
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80 o_discard(item);
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81 }
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82 }
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83
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84 /*
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85 * o_discard:
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86 * free up an item and its object(and maybe contents)
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87 */
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88
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89 void
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90 o_discard(struct linked_list *item)
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91 {
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92 register struct object *obj;
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93
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94 obj = OBJPTR(item);
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95 if (obj->contents != NULL)
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96 o_free_list(obj->contents);
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97 total -= 2;
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98 FREE(obj);
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99 FREE(item);
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100 }
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101
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102 /*
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103 r_free_fire_list
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104 Throw the whole list of fire monsters away. But don't
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105 discard the item (monster) itself as that belong to mlist.
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106 */
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107
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108 void
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109 _r_free_fire_list(struct linked_list **ptr)
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110 {
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111 register struct linked_list *item;
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112
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113 while (*ptr != NULL)
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114 {
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115 item = *ptr;
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116 *ptr = next(item);
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117 free(item);
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118 }
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119 }
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120 /*
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121 * r_free_list:
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122 * Throw the whole list of room exits away
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123 */
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124
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125 void
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126 _r_free_list(struct linked_list **ptr)
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127 {
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128 register struct linked_list *item;
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129
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130 while (*ptr != NULL)
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131 {
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132 item = *ptr;
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133 *ptr = next(item);
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134 r_discard(item);
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135 }
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136 }
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137
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138 /*
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139 * r_discard:
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140 * free up an item and its room
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141 */
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142
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143 void
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144 r_discard(struct linked_list *item)
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145 {
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146 total -= 2;
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147 FREE(DOORPTR(item));
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148 FREE(item);
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149 }
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150
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151 /*
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152 * t_free_list:
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153 * Throw the whole thing list away
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154 */
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155
220
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156 void
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157 _t_free_list(struct linked_list **ptr)
133
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158 {
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159 register struct linked_list *item;
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160
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161 while (*ptr != NULL)
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162 {
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163 item = *ptr;
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164 *ptr = next(item);
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165 t_discard(item);
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166 }
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167 }
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168
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169 /*
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170 * t_discard:
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171 * free up an item and its thing
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172 */
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173
220
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174 void
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175 t_discard(struct linked_list *item)
133
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176 {
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177 register struct thing *tp;
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178
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179 total -= 2;
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180 tp = THINGPTR(item);
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181 if (tp->t_name != NULL) FREE(tp->t_name);
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182 if (tp->t_pack != NULL)
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183 o_free_list(tp->t_pack);
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184 FREE(tp);
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185 FREE(item);
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186 }
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187
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188 /*
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189 * destroy_item:
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190 * get rid of an item structure -- don't worry about contents
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191 */
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192
220
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193 void
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194 destroy_item(struct linked_list *item)
133
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195 {
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196 total--;
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197 FREE(item);
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198 }
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199
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200 /*
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201 * new_item
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202 * get a new item with a specified size
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203 */
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204
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205 struct linked_list *
220
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206 new_item(int size)
133
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207 {
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208 register struct linked_list *item;
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209
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210 if ((item = (struct linked_list *) new(sizeof *item)) == NULL)
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211 msg("Ran out of memory for header after %d items", total);
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212 if ((item->l_data = new(size)) == NULL)
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213 msg("Ran out of memory for data after %d items", total);
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214 item->l_next = item->l_prev = NULL;
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215 memset(item->l_data,0,size);
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216 return item;
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217 }
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218
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219 /*
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220 * creat_item:
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221 * Create just an item structure -- don't make any contents
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222 */
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223
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224 struct linked_list *
220
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225 creat_item(void)
133
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226 {
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227 register struct linked_list *item;
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228
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229 if ((item = (struct linked_list *) new(sizeof *item)) == NULL)
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230 msg("Ran out of memory for header after %d items", total);
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231 item->l_next = item->l_prev = NULL;
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232 return item;
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233 }
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234
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235 char *
220
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236 new(int size)
133
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237 {
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238 register char *space = ALLOC(size);
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239
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240 if (space == NULL) {
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241 sprintf(prbuf,"Rogue ran out of memory (used = %d, wanted = %d).",
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242 md_memused(), size);
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243 fatal(prbuf);
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244 }
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245 total++;
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246 return space;
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247 }
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248