Mercurial > hg > early-roguelike
annotate arogue5/list.c @ 317:aab761616489 default tip
Rearrange some Autoconf files.
Autoconf was failing to detect install-sh at the top level and needed
some explicit directions. It also wants config.guess and config.sub to
be provided too.
A few other macros have also been updated.
author | John "Elwin" Edwards |
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date | Tue, 05 Sep 2023 20:05:24 -0400 |
parents | 0250220d8cdd |
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rev | line source |
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63
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1 /* |
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2 * 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 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 #include <stdlib.h> |
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16 #include "curses.h" |
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17 #include "rogue.h" |
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18 |
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19 /* |
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20 * detach: |
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21 * Takes an item out of whatever linked list it might be in |
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22 */ |
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23 |
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24 void |
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25 _detach(struct linked_list **list, struct linked_list *item) |
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26 { |
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27 if (*list == item) |
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28 *list = next(item); |
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29 if (prev(item) != NULL) item->l_prev->l_next = next(item); |
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30 if (next(item) != NULL) item->l_next->l_prev = prev(item); |
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31 item->l_next = NULL; |
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32 item->l_prev = NULL; |
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33 } |
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34 |
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35 /* |
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36 * _attach: |
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37 * add an item to the head of a list |
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38 */ |
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39 |
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40 void |
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41 _attach(struct linked_list **list, struct linked_list *item) |
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42 { |
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43 if (*list != NULL) |
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44 { |
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45 item->l_next = *list; |
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46 (*list)->l_prev = item; |
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47 item->l_prev = NULL; |
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48 } |
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49 else |
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50 { |
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51 item->l_next = NULL; |
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52 item->l_prev = NULL; |
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53 } |
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54 |
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55 *list = item; |
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56 } |
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57 |
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58 /* |
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59 * o_free_list: |
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60 * Throw the whole object list away |
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61 */ |
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62 |
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63 void |
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64 _o_free_list(struct linked_list **ptr) |
63
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65 { |
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66 register struct linked_list *item; |
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67 |
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68 while (*ptr != NULL) |
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69 { |
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70 item = *ptr; |
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71 *ptr = next(item); |
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72 o_discard(item); |
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73 } |
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74 } |
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75 |
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76 /* |
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77 * o_discard: |
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78 * free up an item and its object(and maybe contents) |
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79 */ |
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80 |
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81 void |
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82 o_discard(struct linked_list *item) |
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83 { |
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84 register struct object *obj; |
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85 obj = OBJPTR(item); |
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86 if (obj->contents != NULL) |
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87 o_free_list(obj->contents); |
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88 total -= 2; |
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89 FREE(item->l_data); |
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90 FREE(item); |
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91 } |
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92 |
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93 /* |
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94 * t_free_list: |
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95 * Throw the whole thing list away |
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96 */ |
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97 |
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98 void |
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99 _t_free_list(struct linked_list **ptr) |
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100 { |
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101 register struct linked_list *item; |
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102 |
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103 while (*ptr != NULL) |
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104 { |
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105 item = *ptr; |
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106 *ptr = next(item); |
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107 t_discard(item); |
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108 } |
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109 } |
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110 |
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111 /* |
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112 * t_discard: |
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113 * free up an item and its thing |
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114 */ |
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115 |
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116 void |
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117 t_discard(struct linked_list *item) |
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118 { |
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119 total -= 2; |
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120 FREE(item->l_data); |
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121 FREE(item); |
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122 } |
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123 |
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124 /* |
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125 * destroy_item: |
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126 * get rid of an item structure -- don't worry about contents |
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127 */ |
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128 |
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129 void |
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130 destroy_item(struct linked_list *item) |
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131 { |
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132 total--; |
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133 FREE(item); |
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134 } |
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135 |
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136 /* |
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137 * new_item |
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138 * get a new item with a specified size |
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139 */ |
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140 |
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141 struct linked_list * |
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142 new_item(int size) |
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143 { |
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144 register struct linked_list *item; |
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145 |
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146 if ((item = (struct linked_list *) new(sizeof *item)) == NULL) |
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147 msg("Ran out of memory for header after %d items", total); |
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148 if ((item->l_data = new(size)) == NULL) |
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149 msg("Ran out of memory for data after %d items", total); |
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150 item->l_next = item->l_prev = NULL; |
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151 return item; |
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152 } |
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153 |
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154 /* |
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155 * creat_item: |
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156 * Create just an item structure -- don't make any contents |
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157 */ |
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158 |
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159 struct linked_list * |
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160 creat_item(void) |
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161 { |
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162 register struct linked_list *item; |
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163 |
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164 if ((item = (struct linked_list *) new(sizeof *item)) == NULL) |
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165 msg("Ran out of memory for header after %d items", total); |
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166 item->l_next = item->l_prev = NULL; |
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167 return item; |
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168 } |
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169 |
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170 char * |
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171 new(int size) |
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172 { |
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173 register char *space = ALLOC(size); |
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174 static char errbuf[LINELEN]; |
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175 |
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176 if (space == NULL) { |
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177 sprintf(errbuf,"Rogue ran out of memory (used = %ld, wanted = %d).", |
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178 md_memused(), size); |
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179 fatal(errbuf); |
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180 } |
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181 total++; |
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182 return space; |
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183 } |