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annotate urogue/list.c @ 295:1e1c81fbb533

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Rogue V5: fix elemental wands. Bolts often failed to hit, due to some struct members not being initialized. Reported by 'LazyCat' from RogueTemple.
author John "Elwin" Edwards
date Fri, 12 Jan 2018 18:02:39 -0500
parents c495a4f288c6
children
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1 /*
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2 list.c - Functions for dealing with linked lists of goodies
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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) 1985, 1986, 1992, 1993, 1995 Herb Chong
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6 All rights reserved.
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7
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8 Based on "Advanced Rogue"
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9 Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka
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10 All rights reserved.
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11
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12 Based on "Rogue: Exploring the Dungeons of Doom"
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13 Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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14 All rights reserved.
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15
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16 See the file LICENSE.TXT for full copyright and licensing information.
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17 */
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18
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19 #include <stdlib.h>
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20 #include <stdio.h>
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21 #include <string.h>
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22 #include "rogue.h"
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23
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24 static char errbuf[2 * LINELEN];
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25
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26 /*
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27 ur_alloc()
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28 ur_free()
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29
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30 These are just calls to the system alloc and free, and they also adjust
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31 the totals. The buffer is cleared out because idents need to be zero
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32 before going into the pack, or they will be used as indices!
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33 */
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34
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35 void *
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36 ur_alloc(size_t size)
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37 {
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38 char *buf_p;
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39
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40 total++;
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41
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42 buf_p = mem_malloc(size);
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43
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44 if (buf_p == NULL)
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45 return(NULL);
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46
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47 memset(buf_p,0,size);
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48
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49 return(buf_p);
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50 }
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51
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52 void
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53 ur_free(void *buf_p)
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54 {
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55 mem_free(buf_p);
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56 total--;
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57 }
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58
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59 /*
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60 detach()
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61 Takes an item out of whatever linked list it might be in
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62 .... function needs to be renamed....
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63 */
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64
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65 void
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66 _detach(struct linked_list **list, struct linked_list *item)
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67 {
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68 if (*list == item)
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69 *list = next(item);
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70
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71 if (prev(item) != NULL)
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72 item->l_prev->l_next = next(item);
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73
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74 if (next(item) != NULL)
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75 item->l_next->l_prev = prev(item);
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76
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77 item->l_next = NULL;
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78 item->l_prev = NULL;
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79 }
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80
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81 /*
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82 _attach()
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83 add an item to the head of a list
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84 ... this needs to be renamed as well ...
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85 */
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86
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87 void
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88 _attach(struct linked_list **list, struct linked_list *item)
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89 {
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90 if (*list != NULL)
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91 {
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92 item->l_next = *list;
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93 (*list)->l_prev = item;
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94 item->l_prev = NULL;
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