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annotate arogue7/list.c @ 211:382ff498acdd

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Initialize some more pointers for the benefit of MSVC. There should be no more errors with Visual Studio 2015, in Debug or Release mode.
author John "Elwin" Edwards
date Thu, 21 Jan 2016 21:10:23 -0500
parents adfa37e67084
children f9ef86cf22b2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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125
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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 * Advanced Rogue
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5 * Copyright (C) 1984, 1985, 1986 Michael Morgan, Ken Dalka and AT&T
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6 * All rights reserved.
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7 *
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8 * Based on "Rogue: Exploring the Dungeons of Doom"
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9 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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10 * All rights reserved.
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11 *
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12 * See the file LICENSE.TXT for full copyright and licensing information.
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13 */
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14
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15 /*
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16 * Functions for dealing with linked lists of goodies
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17 *
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18 */
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19
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20 #include "curses.h"
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21 #include <stdlib.h>
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22 #include "rogue.h"
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23
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24 /*
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25 * detach:
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26 * Takes an item out of whatever linked list it might be in
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27 */
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28
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29 _detach(list, item)
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30 register struct linked_list **list, *item;
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31 {
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32 if (*list == item)
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33 *list = next(item);
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34 if (prev(item) != NULL) item->l_prev->l_next = next(item);
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35 if (next(item) != NULL) item->l_next->l_prev = prev(item);
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36 item->l_next = NULL;
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37 item->l_prev = NULL;
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38 }
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39
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40 /*
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41 * _attach:
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42 * add an item to the head of a list
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43 */
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44
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45 _attach(list, item)
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46 register struct linked_list **list, *item;
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47 {
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48 if (*list != NULL)
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49 {
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50 item->l_next = *list;
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51 (*list)->l_prev = item;
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52 item->l_prev = NULL;
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53 }
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54 else
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55 {
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56 item->l_next = NULL;
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57 item->l_prev = NULL;
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58 }
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59
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60 *list = item;
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61 }
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62
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63 /*
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64 * o_free_list:
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65 * Throw the whole object list away
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66 */
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67
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68 _o_free_list(ptr)
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69 register struct linked_list **ptr;
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70 {
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71 register struct linked_list *item;
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72
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73 while (*ptr != NULL)
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74 {
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75 item = *ptr;
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76 *ptr = next(item);
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77 o_discard(item);
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78 }
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79 }
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80
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81 /*
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82 * o_discard:
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83 * free up an item and its object(and maybe contents)
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84 */
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85
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86 o_discard(item)
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87 register struct linked_list *item;
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88 {
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89 register struct object *obj;
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90
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91 obj = OBJPTR(item);
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92 if (obj->contents != NULL)
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93 o_free_list(obj->contents);
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94 total -= 2;
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95 FREE(obj);
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96 FREE(item);
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97 }
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98
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99 /*
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100 * r_free_list:
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101 * Throw the whole list of room exits away
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102 */
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103
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104 _r_free_list(ptr)
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105 register struct linked_list **ptr;
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106 {
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107 register struct linked_list *item;
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108
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109 while (*ptr != NULL)
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110 {
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111 item = *ptr;
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112 *ptr = next(item);
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113 r_discard(item);
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114 }
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115 }
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116
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117 /*
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118 * r_discard:
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119 * free up an item and its room
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120 */
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121
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122 r_discard(item)
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123 register struct linked_list *item;
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124 {
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125 total -= 2;
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126 FREE(DOORPTR(item));
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127 FREE(item);
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128 }
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129
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130 /*
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131 * t_free_list:
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132 * Throw the whole thing list away
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133 */
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134
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135 _t_free_list(ptr)
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136 register struct linked_list **ptr;
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137 {
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138 register struct linked_list *item;
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139
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140 while (*ptr != NULL)
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141 {
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142 item = *ptr;
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143 *ptr = next(item);
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144 t_discard(item);
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145 }
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146 }
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147
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148 /*
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149 * t_discard:
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150 * free up an item and its thing
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151 */
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152
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153 t_discard(item)
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154 register struct linked_list *item;
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155 {
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156 register struct thing *tp;
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157
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158 total -= 2;
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159 tp = THINGPTR(item);
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160 if (tp->t_name != NULL) FREE(tp->t_name);
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161 FREE(tp);
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162 FREE(item);
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163 }
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164
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165 /*
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166 * destroy_item:
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167 * get rid of an item structure -- don't worry about contents
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168 */
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169
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170 destroy_item(item)
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171 register struct linked_list *item;
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172 {
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173 total--;
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174 FREE(item);
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175 }
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176
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177 /*
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178 * new_item
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179 * get a new item with a specified size
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180 */
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181
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182 struct linked_list *
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183 new_item(size)
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184 int size;
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185 {
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186 register struct linked_list *item;
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187
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188 if ((item = (struct linked_list *) new(sizeof *item)) == NULL)
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189 msg("Ran out of memory for header after %d items", total);
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190 if ((item->l_data = new(size)) == NULL)
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191 msg("Ran out of memory for data after %d items", total);
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192 item->l_next = item->l_prev = NULL;
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193 return item;
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194 }
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195
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196 /*
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197 * creat_item:
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198 * Create just an item structure -- don't make any contents
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199 */
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200
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201 struct linked_list *
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202 creat_item()
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203 {
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204 register struct linked_list *item;
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205
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206 if ((item = (struct linked_list *) new(sizeof *item)) == NULL)
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207 msg("Ran out of memory for header after %d items", total);
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208 item->l_next = item->l_prev = NULL;
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209 return item;
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210 }
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211
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212 char *
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213 new(size)
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214 int size;
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215 {
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216 register char *space = ALLOC(size);
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217 static char errbuf[LINELEN];
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218
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219 if (space == NULL) {
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220 sprintf(errbuf,"Rogue ran out of memory (used = %d, wanted = %d).",
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221 md_memused(), size);
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222 fatal(errbuf);
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223 }
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224 total++;
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225 return space;
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226 }