Mercurial > hg > early-roguelike
annotate urogue/bag.c @ 315:ad2570b5b21f
Advanced Rogue 5, 7: fix some trading post messages.
When attempting to buy an unaffordable object, messages were often of
the form "You can't afford that a scroll of hold monster !", because
the object description (stored in curpurch) was the same text used in
inventory displays.
This has been worked around by inspecting the contents of curpurch and
using different message templates.
author | John "Elwin" Edwards |
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date | Sun, 24 Oct 2021 20:26:21 -0400 |
parents | 0250220d8cdd |
children |
rev | line source |
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1 /* |
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2 bag.c - functions for dealing with bags |
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3 |
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4 UltraRogue: The Ultimate Adventure in the Dungeons of Doom |
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5 Copyright (C) 1986, 1992, 1993, 1995 Herb Chong |
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6 All rights reserved. |
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7 |
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8 See the file LICENSE.TXT for full copyright and licensing information. |
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9 */ |
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10 |
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11 /* |
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12 * new bag functions |
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13 * |
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14 * This is a simple version of bag.c that uses linked lists to perform the bag |
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15 * functions. The bag is just a linked list of objects (struct object) to be |
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16 * specific, but most of that is supposed to be hidden from the user, who |
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17 * should access the bag only through the functions presented here. |
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18 */ |
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19 |
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20 #include <stdlib.h> |
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21 #include "rogue.h" |
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22 |
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23 /* |
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24 * apply_to_bag |
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25 * |
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26 * This is the general bag manipulation routine. The bag is subjected to |
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27 * selection criteria and those objects which pass are processed by an action |
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28 * routine. The two criteria are type and filter function. The filter |
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29 * function returns TRUE if the object passes and FALSE otherwise. The filter |
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30 * function is passed the object and the user-supplied argument. This gives |
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31 * the user plenty of flexibility in determining which items will be |
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32 * processed. The action routine is passed the object, the id, and the |
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33 * user-supplied argument given to apply_to_bag. Specifying NULL for either |
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34 * the type or filter function means that criterion always selects. A NULL |
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35 * action routine means no processing is done and the first object which |
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36 * passes the filter is returned to the user. The action routine returns TRUE |
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37 * if processing should continue or FALSE if the current item should be |
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38 * returned to the caller. |
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39 * |
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40 * Returns NULL if the bag is empty or if nothing qualified. |
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41 * |
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42 * linked_list *bag_p; // linked list of objects |
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43 * int type; // what is its type (ARMOR, ...) |
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44 * int (*bff_p)(); // bag filter function |
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45 * int (*baf_p)(); // bag action routine |
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46 * long user_arg; // user argument for filter, action |
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47 * |
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48 */ |
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49 |
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50 struct object * |
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51 apply_to_bag(struct linked_list *bag_p, |
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52 int type, |
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53 int (*bff_p)(struct object *obj, bag_arg *user_arg), |
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54 int (*baf_p)(struct object *obj, bag_arg *user_arg, int id), |
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55 void *user_arg) |
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56 { |
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57 struct object *bag_obj_p = NULL; /* qualifying object */ |
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58 struct object *cur_obj_p; /* current object */ |
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59 bag_arg arg; |
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60 |
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61 arg.varg = user_arg; |
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62 |
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63 if (bag_p == NULL) |
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64 return (NULL); |
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65 |
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66 for (; bag_p != NULL; bag_p = next(bag_p)) |
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67 { |
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68 cur_obj_p = OBJPTR(bag_p); |
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69 |
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70 if (type != 0 && type != cur_obj_p->o_type) |
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71 continue; |
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72 |
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73 if (bff_p != NULL && !(*bff_p)(cur_obj_p, &arg)) |
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74 continue; |
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75 |
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76 /* |
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77 * At this point, we have an object which qualifies for |
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78 * processing |
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79 */ |
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80 |
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81 bag_obj_p = cur_obj_p; /* in case the user wants it */ |
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82 |
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83 if (baf_p != NULL && (*baf_p)(cur_obj_p, &arg, identifier(bag_obj_p))) |
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84 continue; |
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85 |
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86 /* |
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87 * We have an object which qualifies, quit now! |
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88 */ |
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89 |
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90 break; |
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91 } |
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92 |
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93 if (bag_p == NULL) |
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94 return (NULL); |
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95 |
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96 return (bag_obj_p); |
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97 } |
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98 |
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99 /* |
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100 count_bag() |
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101 |
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102 Counts up all bag items which meet the selection criteria |
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103 */ |
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104 |
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105 int |
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106 count_bag(linked_list *bag_p, |
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107 int type, |
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108 int (*bff_p)(struct object *obj, bag_arg *junk)) |
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109 { |
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110 int cnt = 0; |
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111 apply_to_bag(bag_p, type, bff_p, baf_increment, &cnt); |
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112 |
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113 return(cnt); |
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114 } |
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115 |
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116 /* |
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117 del_bag() |
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118 |
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119 Removes an object from a bag and throws it away. |
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120 */ |
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121 |
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122 void |
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123 del_bag(linked_list *bag_p, object *obj_p) |
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124 { |
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125 pop_bag(&bag_p, obj_p); /* get the thing from the bag */ |
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126 ur_free(obj_p); /* release the memory */ |
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127 } |
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128 |
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129 /* |
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130 pop_bag() |
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131 |
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132 Removes an item from a bag and returns it to the user. If the item is |
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133 not in the bag, return NULL. |
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134 */ |
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135 |
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136 struct object * |
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137 pop_bag(linked_list **bag_pp, object *obj_p) |
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138 { |
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139 linked_list *item_p; |
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140 |
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141 for (item_p = *bag_pp; item_p != NULL && OBJPTR(item_p) != obj_p; |
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142 item_p = next(item_p)); |
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143 |
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144 if (item_p == NULL) |
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145 return (NULL); |
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146 |
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147 _detach(bag_pp, item_p); |
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148 |
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149 return (obj_p); |
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150 } |
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151 |
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152 /* |
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153 push_bag() |
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154 |
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155 stuff another item into the bag |
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156 */ |
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157 |
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158 void |
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159 push_bag(linked_list **bag_pp, object *obj_p) |
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160 { |
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161 struct linked_list *item_p = NULL; |
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162 struct linked_list *new_p = NULL; |
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163 struct linked_list *best_p = NULL; |
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164 |
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165 new_p = new_list(); |
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166 new_p->data.obj = obj_p; /* attach our object */ |
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167 identifier(obj_p) = get_ident(obj_p); /* tag this object for */ |
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168 /* inventory */ |
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169 /* |
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170 * Find a place in the bag - try to match the type, then sort by |
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171 * identifier |
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172 */ |
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173 |
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174 for (item_p = *bag_pp; item_p != NULL; item_p = next(item_p)) |
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175 { |
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176 if ((OBJPTR(item_p))->o_type == obj_p->o_type) |
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177 { |
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178 if (best_p == NULL) |
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179 best_p = item_p; |
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180 else if (identifier((OBJPTR(item_p))) > |
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181 identifier((OBJPTR(best_p))) && |
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182 identifier((OBJPTR(item_p))) < |
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183 identifier(obj_p)) |
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184 best_p = item_p; |
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185 } |
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186 } |
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187 |
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188 _attach_after(bag_pp, best_p, new_p); /* stuff it in the list */ |
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189 |
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190 return; |
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191 } |
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192 |
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193 /* |
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194 scan_bag() |
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195 |
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196 Gets the object from the bag that matches the type and id. The object |
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197 is not removed from the bag. |
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198 */ |
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199 |
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200 struct object * |
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201 scan_bag(linked_list *bag_p, int type, int id) |
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202 { |
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203 object *obj_p = NULL; |
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204 |
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205 for (; bag_p != NULL; bag_p = next(bag_p)) |
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206 { |
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207 obj_p = OBJPTR(bag_p); |
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208 |
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209 if (obj_p->o_type == type && identifier(obj_p) == id) |
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210 break; |
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211 } |
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212 |
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213 if (bag_p == NULL) |
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214 return(NULL); |
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215 |
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216 return(obj_p); |
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217 } |
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218 |
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219 /* |
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220 baf_decrement_test() |
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221 |
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222 Assumes the argument is a pointer to int and it just decrements it. |
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223 Returns TRUE, except when the count goes to zero. |
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224 */ |
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225 |
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226 int |
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227 baf_decrement_test(struct object *obj_p, bag_arg *count_p, int id) |
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228 { |
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229 NOOP(obj_p); |
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230 NOOP(id); |
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231 |
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232 if (*count_p->iarg > 0) |
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233 return(TRUE); |
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234 |
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235 return(FALSE); |
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236 } |
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237 |
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238 /* |
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239 baf_identify() |
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240 |
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241 Bag action function to identify an object. This is needed to conform |
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242 to bag action routine calling conventions and to put the linked list |
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243 structure on top of the object before calling whatis() |
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244 */ |
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245 |
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246 int |
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247 baf_identify(struct object *obj_p, bag_arg *junk, int id) |
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248 { |
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249 linked_list l; |
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250 linked_list *lp = &l; |
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251 |
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252 NOOP(junk); |
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253 NOOP(id); |
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254 |
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255 lp->data.obj = obj_p; /* stuff object in the right place */ |
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256 whatis(lp); |
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257 |
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258 return(TRUE); |
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259 } |
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260 |
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261 /* |
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262 baf_increment() |
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263 |
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264 Assumes the argument is a pointer to int and it just increments it and |
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265 returns TRUE |
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266 */ |
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267 |
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268 int |
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269 baf_increment(object *obj_p, bag_arg *count_p, int id) |
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270 { |
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271 NOOP(obj_p); |
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272 NOOP(id); |
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273 |
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274 (*count_p->iarg)++; |
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275 |
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276 return(TRUE); |
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277 } |
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278 |
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279 /* |
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280 baf_print_item() |
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281 Bag action function to print a single item, inventory style. |
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282 */ |
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283 |
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284 int |
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285 baf_print_item(struct object *obj_p, bag_arg *type, int id) |
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286 { |
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287 char inv_temp[3 * LINELEN]; /* plenty of space for paranoid programmers */ |
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288 |
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289 if (*type->iarg == 0) |
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290 sprintf(inv_temp, "%c%c) %s", obj_p->o_type, |
300
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291 print_letters[id], inv_name(obj_p, LOWERCASE)); |
256
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292 else |
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293 sprintf(inv_temp, "%c) %s", print_letters[id], |
300
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294 inv_name(obj_p, LOWERCASE)); |
256
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295 |
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296 add_line(inv_temp); |
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297 return(TRUE); |
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298 } |
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299 |
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300 /* |
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301 bff_group() |
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302 This bag filter function checks to see if two items can be combined by |
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303 adjusting the count. Grouped items can be combined if the group numbers |
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304 match. The only other item that is allowed to have a count is food, and |
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305 there an exact match is required. |
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306 */ |
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307 |
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308 int |
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309 bff_group(struct object *obj_p, bag_arg *arg) |
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310 { |
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311 struct object *new_obj_p = arg->obj; |
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312 |
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313 if (new_obj_p->o_group > 0 && new_obj_p->o_group == obj_p->o_group) |
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314 return(TRUE); |
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315 |
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316 if (new_obj_p->o_type == FOOD && |
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317 obj_p->o_type == new_obj_p->o_type && |
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318 obj_p->o_which == new_obj_p->o_which) |
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319 return(TRUE); |
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320 |
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321 return(FALSE); |
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322 } |
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323 |
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324 /* |
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325 bff_callable |
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326 Figures out which items can be callable: current rules are: |
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327 potions, scrolls, staffs, and rings. |
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328 */ |
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329 |
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330 int |
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331 bff_callable(struct object *obj_p, bag_arg *junk) |
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332 { |
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333 NOOP(junk); |
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334 |
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335 if (obj_p->o_type == POTION || obj_p->o_type == RING || |
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336 obj_p->o_type == STICK || obj_p->o_type == SCROLL) |
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337 return(TRUE); |
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338 |
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339 return(FALSE); |
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340 } |
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341 |
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342 /* |
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343 bff_markable() |
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344 Selects which items can be marked. Current rules exclude only gold. |
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345 */ |
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346 |
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347 int |
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348 bff_markable(struct object *obj_p, bag_arg *junk) |
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349 { |
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350 NOOP(junk); |
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351 |
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352 if (obj_p->o_type == GOLD) |
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353 return(FALSE); |
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354 |
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355 return(TRUE); |
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356 } |
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357 |
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358 /* |
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359 bffron() |
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360 returns TRUE if hero is wearing this ring |
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361 */ |
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362 |
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363 int |
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364 bffron(object *obj_p, bag_arg *junk) |
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365 { |
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366 NOOP(junk); |
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367 |
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368 return(cur_ring[LEFT_1] == obj_p || cur_ring[LEFT_2] == obj_p || |
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369 cur_ring[LEFT_3] == obj_p || cur_ring[LEFT_4] == obj_p || |
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370 cur_ring[LEFT_5] || |
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371 cur_ring[RIGHT_1] == obj_p || cur_ring[RIGHT_2] == obj_p || |
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372 cur_ring[RIGHT_3] == obj_p || cur_ring[RIGHT_4] == obj_p || |
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373 cur_ring[RIGHT_5]); |
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374 } |
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375 |
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376 /* |
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377 bff_zappable() |
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378 Selects which items can be zapped. This includes both sticks and |
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379 magically enhanced weapons with lightning ability. |
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380 */ |
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381 |
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382 int |
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383 bff_zappable(struct object *obj_p, bag_arg *junk) |
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384 { |
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385 NOOP(junk); |
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386 |
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387 if (obj_p->o_type == STICK) |
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388 return(TRUE); |
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389 |
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390 if (obj_p->o_type == WEAPON && obj_p->o_flags & ISZAPPED) |
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391 return(TRUE); |
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392 |
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393 return (FALSE); |
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394 } |
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395 |
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396 /* |
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397 baf_curse() |
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398 Curse all non-artifact items in the player's pack |
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399 */ |
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400 |
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401 int |
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402 baf_curse(struct object *obj_p, bag_arg *junk, int id) |
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403 { |
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404 NOOP(junk); |
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405 NOOP(id); |
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406 |
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407 if (obj_p->o_type != ARTIFACT && rnd(8) == 0) |
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408 { |
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409 obj_p->o_flags |= ISCURSED; |
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410 obj_p->o_flags &= ~ISBLESSED; |
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411 } |
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412 |
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413 return(TRUE); |
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414 } |
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415 |
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416 /* |
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417 bafcweapon() |
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418 bag action routine to fetch the current weapon |
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419 */ |
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420 |
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421 int |
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422 bafcweapon(struct object *obj_p, bag_arg *junk, int id) |
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423 { |
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424 NOOP(junk); |
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425 NOOP(id); |
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426 |
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427 if (obj_p == cur_weapon) |
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428 return(FALSE); /* found what we wanted - stop and return it */ |
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429 |
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430 return(TRUE); |
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431 } |
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432 |
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433 /* |
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434 bafcarmor() |
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435 bag action routine to fetch the current armor |
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436 */ |
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437 |
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438 int |
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439 bafcarmor(struct object *obj_p, bag_arg *junk, int id) |
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440 { |
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441 NOOP(junk); |
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442 NOOP(id); |
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443 |
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444 if (obj_p == cur_armor) |
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445 return(FALSE); /* found what we wanted - stop and return it */ |
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446 |
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447 return(TRUE); |
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448 } |