Mercurial > hg > early-roguelike
annotate urogue/ident.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 | c495a4f288c6 |
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rev | line source |
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1 /* |
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2 ident.c - routines to associate an identifier with an object |
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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, 1991, 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 * ident |
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13 * |
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14 * This file contains routines to associate an identifier with an object. The |
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15 * identifiers are organized by type. Once an identifier is attached to an |
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16 * object, it remains with that object until the object is removed from the |
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17 * game. The identifiers are small integers, and they are assigned merely by |
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18 * counting objects of the same type. Allocation picks the next available |
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19 * integer. |
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20 * |
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21 * It is required that the linked list be sorted within types so that gaps can |
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22 * easily be detected. |
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23 */ |
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24 |
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25 #include "rogue.h" |
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26 |
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27 /* |
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28 * Index of 0 is invalid (unused state) |
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29 */ |
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30 |
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31 char print_letters[] = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; |
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32 linked_list *ident_list = NULL; /* master list of all items */ |
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33 |
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34 /* |
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35 get_ident() |
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36 |
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37 Gets the identifier for the given object. If an identifier exists, it is |
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38 returned. If not, one is allocated and returned to the user. The |
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39 identifier remains constant as long as the object is in the game. |
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40 */ |
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41 |
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42 int |
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43 get_ident(struct object *obj_p) |
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44 { |
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45 int obj_type = obj_p->o_type; |
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46 linked_list *list_p; /* pointer into ident_list */ |
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47 int new_id = 1; /* in case we have to allocate */ |
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48 struct object *tmp_obj_p; |
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49 struct linked_list *new_place_p = NULL; |
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50 |
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51 if (identifier(obj_p) != 0) |
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52 return (identifier(obj_p)); |
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53 |
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54 /* no identifier - must allocate one */ |
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55 |
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56 for (list_p = ident_list; list_p != NULL; list_p = next(list_p)) |
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57 { |
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58 tmp_obj_p = OBJPTR(list_p); |
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59 |
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60 if (tmp_obj_p->o_type == obj_type) |
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61 { |
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62 if (identifier(tmp_obj_p) == new_id) |
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63 { |
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64 /* if this id is taken, try next */ |
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65 new_place_p = list_p; |
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66 new_id++; |
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67 } |
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68 } |
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69 } |
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70 |
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71 /* |
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72 * If we get here, the object is not in the list, and we need to add |
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73 * it. The proper id is in new_id, and the place to put it is right |
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74 * after new_place_p. |
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75 */ |
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76 |
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77 list_p = new_list(); |
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78 _attach_after(&ident_list, new_place_p, list_p); |
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79 identifier(obj_p) = new_id; |
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80 list_p->data.obj = obj_p; |
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81 return(new_id); |
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82 } |
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83 |
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84 /* |
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85 free_ident() |
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86 |
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87 Frees up an identifier by removing the list entry that contains that item. |
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88 If the item isn't found, nothing is done. |
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89 */ |
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90 |
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91 void |
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92 free_ident(struct object *obj_p) |
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93 { |
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94 linked_list *list_p; |
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95 |
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96 for (list_p = ident_list; list_p != NULL; list_p = next(list_p)) |
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97 { |
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98 if (obj_p == OBJPTR(list_p)) |
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99 { |
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100 _detach(&ident_list, list_p); /* unlink it from the list */ |
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101 ur_free(list_p); /* release link structure */ |
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102 break; |
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103 } |
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104 } |
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105 } |
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106 |
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107 /* |
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108 unprint_id() |
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109 |
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110 Converts a printable id from print_letters to the real thing by getting the |
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111 index. |
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112 */ |
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113 |
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114 int |
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115 unprint_id(char *print_id) |
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116 { |
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117 char *id_p; |
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118 |
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119 for (id_p = print_letters; id_p != NULL; id_p++) |
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120 if (*id_p == *print_id) |
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121 break; |
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122 |
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123 return( (int) (id_p - print_letters) ); |
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124 } |
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125 |
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126 /* |
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127 max_print() |
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128 |
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129 returns the size of the print list |
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130 */ |
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131 |
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132 int |
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133 max_print(void) |
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134 { |
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135 return(sizeof(print_letters) - 2); /* 1 for blank and 1 for EOS string */ |
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136 } |