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annotate rogue3/list.c @ 114:a5433ba4cabf

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arogue5: fix some daemon-related pointer/int casting. Daemons and fuses take a single argument, nominally an int but either ignored or unsafely cast to a pointer. Its type has now been changed to void*. The save/restore code no longer tries to store this argument in the savefile. For doctor(), this is not a problem, because player is the only argument it is ever given as a daemon. However, alchemy() will fail to do anything when passed NULL. Fixing this would be complicated but possible. Summary: the code is slightly safer, but alchemy jugs are guaranteed to stop working after save and restore, instead of just extremely likely.
author John "Elwin" Edwards
date Fri, 28 Mar 2014 10:57:03 -0700
parents 527e2150eaf0
children 0250220d8cdd
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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 {
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