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annotate arogue7/list.c @ 229:50b89f165a34

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Use uniform return types for functions related to options. Functions for printing options now return void. Functions for setting options now return int. Argument types still vary, though converting all the option pointers to void* would be possible.
author John "Elwin" Edwards
date Sun, 06 Mar 2016 14:45:18 -0500
parents f9ef86cf22b2
children 0250220d8cdd
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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 * Advanced Rogue
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5 * Copyright (C) 1984, 1985, 1986 Michael Morgan, Ken Dalka and AT&T
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6 * All rights reserved.
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7 *
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8 * Based on "Rogue: Exploring the Dungeons of Doom"
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9 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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10 * All rights reserved.
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11 *
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12 * See the file LICENSE.TXT for full copyright and licensing information.
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13 */
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14
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15 /*
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16 * Functions for dealing with linked lists of goodies
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17 *
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18 */
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19
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20 #include "curses.h"
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21 #include <stdlib.h>
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22 #include "rogue.h"
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23
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24 void r_discard(struct linked_list *item);
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25 void t_discard(struct linked_list *item);
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26
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27 /*
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28 * detach:
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29 * Takes an item out of whatever linked list it might be in
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30 */
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31
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32 void
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33 _detach(struct linked_list **list, struct linked_list *item)
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34 {
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35 if (*list == item)
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36 *list = next(item);
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37 if (prev(item) != NULL) item->l_prev->l_next = next(item);
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38 if (next(item) != NULL) item->l_next->l_prev = prev(item);
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39 item->l_next = NULL;
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40 item->l_prev = NULL;
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41 }
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42
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43 /*
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44 * _attach:
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45 * add an item to the head of a list
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46 */
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47
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48 void
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49 _attach(struct linked_list **list, struct linked_list *item)
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50 {
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51 if (*list != NULL)
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52 {
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53 item->l_next = *list;
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54 (*list)->l_prev = item;
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55 item->l_prev = NULL;
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56 }
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57 else
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58 {
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59 item->l_next = NULL;
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60 item->l_prev = NULL;
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61 }
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62
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63 *list = item;
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64 }
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65
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66 /*
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67 * o_free_list:
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68 * Throw the whole object list away
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69 */
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71 void
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72 _o_free_list(struct linked_list **ptr)
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73 {
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74 register struct linked_list *item;
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75
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76 while (*ptr != NULL)
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77 {
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78 item = *ptr;
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79 *ptr = next(item);
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80 o_discard(item);
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81 }
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82 }
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83
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84 /*
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85 * o_discard:
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86 * free up an item and its object(and maybe contents)
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87 */
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88
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89 void
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90 o_discard(struct linked_list *item)
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91 {