Mercurial > hg > early-roguelike
annotate rogue3/list.c @ 227:696277507a2e
Rogue V4, V5: disable a cheat granting permanent monster detection.
In these two games, a potion of monster detection turns on the player's
SEEMONST flag. A fuse is set to call turn_see() to turn the flag back
off. But the save and restore functions do not recognize turn_see() and
fail to set the fuse up again.
When restoring, Rogue V4 merely sets the fuse's function to NULL and
leaves it burning. When it goes off, a segfault results. Rogue V5
clears all the fuse's fields, and the player retains the ability to see
all monsters on the level.
The save and restore code can now handle the fuse. The function used is
a new wrapper, turn_see_off(), which should lead to less problems with
daemons being multiple incompatible types.
Also, Rogue V4 and Super-Rogue now properly clear unrecognized daemon
and fuse slots when restoring a saved game.
author | John "Elwin" Edwards |
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date | Sat, 05 Mar 2016 12:10:20 -0500 |
parents | 527e2150eaf0 |
children | 0250220d8cdd |
rev | line source |
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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 * @(#)list.c 3.3 (Berkeley) 6/15/81 |
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5 * |
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6 * Rogue: Exploring the Dungeons of Doom |
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7 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman |
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8 * All rights reserved. |
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9 * |
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10 * See the file LICENSE.TXT for full copyright and licensing information. |
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11 */ |
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12 |
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13 #include "curses.h" |
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14 #include <stdlib.h> |
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15 #include <string.h> |
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16 #include "machdep.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 * _free_list: |
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60 * Throw the whole blamed thing away |
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61 */ |
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62 |
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63 void |
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64 _free_list(struct linked_list **ptr) |
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65 { |
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66 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 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 * discard: |
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78 * free up an item |
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79 */ |
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80 |
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81 void |
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82 discard(struct linked_list *item) |
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83 { |
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84 total -= 2; |
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85 FREE(item->l_data); |
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86 FREE(item); |
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87 } |
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88 |
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89 /* |
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90 * new_item |
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91 * get a new item with a specified size |
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92 */ |
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93 |
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94 struct linked_list * |
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95 new_item(int size) |
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96 { |
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97 struct linked_list *item; |
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98 |
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99 if ((item = (struct linked_list *) _new(sizeof *item)) == NULL) |
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100 { |
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101 msg("Ran out of memory for header after %d items", total); |
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102 return NULL; |
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103 } |
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104 |
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105 if ((item->l_data = _new(size)) == NULL) |
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106 { |