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annotate srogue/list.c @ 306:057c5114e244

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Super-Rogue: fix some out-of-range constants. Constants K_ARROW etc., for causes of death other than monsters, are in the 240-255 range. They were often passed to functions taking char, which is usually signed, making the values out of range. The function declarations have been changed to unsigned char, which is also the type used by the scoreboard code.
author John "Elwin" Edwards
date Sat, 17 Apr 2021 15:41:12 -0400
parents 0250220d8cdd
children
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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 9.0 (rdk) 7/17/84
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5 *
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6 * Super-Rogue
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7 * Copyright (C) 1984 Robert D. Kindelberger
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8 * All rights reserved.
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9 *
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10 * Based on "Rogue: Exploring the Dungeons of Doom"
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11 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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12 * All rights reserved.
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13 *
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14 * See the file LICENSE.TXT for full copyright and licensing information.
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15 */
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16
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17 #include <stdlib.h>
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18 #include "rogue.h"
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19 #include "rogue.ext"
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20
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21 /*
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22 * detach:
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23 * Takes an item out of whatever linked list it might be in
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24 */
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25
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26 void
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27 _detach(struct linked_list **list, struct linked_list *item)
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28 {
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29 if (*list == item)
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30 *list = next(item);
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31 if (prev(item) != NULL)
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32 item->l_prev->l_next = next(item);
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33 if (next(item) != NULL)
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34 item->l_next->l_prev = prev(item);
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35 item->l_next = NULL;
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36 item->l_prev = NULL;
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37 }
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38
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39 /*
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40 * _attach: add an item to the head of a list
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41 */
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42 void
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43 _attach(struct linked_list **list, struct linked_list *item)
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44 {
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45 if (*list != NULL) {
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46 item->l_next = *list;
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47 (*list)->l_prev = item;
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48 item->l_prev = NULL;
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49 }
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50 else {
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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 *list = item;
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55 }
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56
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57 /*
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58 * _free_list: Throw the whole blamed thing away
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59 */
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60 void
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61 _free_list(struct linked_list **ptr)
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62 {
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63 register struct linked_list *item;
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64
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65 while (*ptr != NULL) {
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66 item = *ptr;
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67 *ptr = next(item);
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68 discard(item);
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69 }
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70 }
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71
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72 /*
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73 * discard: free up an item
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74 */
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75 void
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76 discard(struct linked_list *item)
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77 {
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78 total -= 2;
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79 FREE(item->l_data);
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80 FREE(item);
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81 }
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82
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83 /*
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84 * new_item: get a new item with a specified size
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85 */
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86 struct linked_list *
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87 new_item(int size)
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88 {
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89 register struct linked_list *item;
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90
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91 item = (struct linked_list *) new(sizeof *item);
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92 item->l_data = new(size);
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93 item->l_next = item->l_prev = NULL;
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94 return item;
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95 }
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96
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97 char *
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98 new(int size)
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99 {
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100 register char *space = ALLOC(size);
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101
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102 if (space == NULL) {
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103 sprintf(prbuf,"Rogue ran out of memory (%ld).", md_memused());
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