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annotate rogue4/list.c @ 171:80c060734f51

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arogue7: fix messages from detection potions. Another fix for overwritten messages, this time for potions of monster detection and magic detection. I've made the message appear before the display of information, which may be closer to the originally intended behavior.
author John "Elwin" Edwards
date Thu, 02 Jul 2015 16:27:39 -0400
parents 9535a08ddc39
children 1b73a8641b37
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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12
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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 4.7 (Berkeley) 12/19/81
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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, 1982 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 <stdlib.h>
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14 #include <curses.h>
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15 #include "rogue.h"
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16
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17 /*
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18 * detach:
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19 * Takes an item out of whatever linked list it might be in
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20 */
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21 _detach(list, item)
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22 register THING **list, *item;
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23 {
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24 if (*list == item)
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25 *list = next(item);
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26 if (prev(item) != NULL) item->l_prev->l_next = next(item);
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27 if (next(item) != NULL) item->l_next->l_prev = prev(item);
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28 item->l_next = NULL;
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29 item->l_prev = NULL;
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30 }
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31
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32 /*
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33 * _attach:
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34 * add an item to the head of a list
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35 */
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36 _attach(list, item)
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37 register THING **list, *item;
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38 {
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39 if (*list != NULL)
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40 {
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41 item->l_next = *list;
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42 (*list)->l_prev = item;
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43 item->l_prev = NULL;
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44 }
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45 else
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46 {
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47 item->l_next = NULL;
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48 item->l_prev = NULL;
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49 }
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50 *list = item;
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51 }
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52
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53 /*
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54 * _free_list:
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55 * Throw the whole blamed thing away
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56 */
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57 _free_list(ptr)
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58 register THING **ptr;
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59 {
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60 register THING *item;
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61
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62 while (*ptr != NULL)
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63 {
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64 item = *ptr;
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65 *ptr = next(item);
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66 discard(item);
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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 * discard:
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72 * Free up an item
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73 */
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74 discard(item)
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75 register THING *item;
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76 {
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77 total--;
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78 free((char *) item);
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79 }
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80
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81 /*
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82 * new_item
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83 * Get a new item with a specified size
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84 */
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85 THING *
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86 new_item()
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87 {
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88 register THING *item;
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89
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90 if ((item = calloc(1, sizeof *item)) == NULL)
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91 msg("ran out of memory after %d items", total);
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92 else
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93 total++;
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94 item->l_next = item->l_prev = NULL;
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95 return item;
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96 }