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annotate rogue3/list.c @ 162:600873555ec0

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Don't swap signal handlers in md_shellescape(). md_shellescape() sets SIGINT and SIGQUIT to be ignored, storing the previous handlers, and restores them after the shell exits. But it mixed up the two handlers. Since the signals were usually handled by the same function, this fix doesn't have much effect, but anything that makes signal code less confusing is a good thing.
author John "Elwin" Edwards
date Mon, 08 Jun 2015 10:01:25 -0400
parents 527e2150eaf0
children 0250220d8cdd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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107 msg("Ran out of memory for data after %d items", total);