Mercurial > hg > early-roguelike
annotate rogue5/list.c @ 162:600873555ec0
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 |
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date | Mon, 08 Jun 2015 10:01:25 -0400 |
parents | f502bf60e6e4 |
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rev | line source |
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33
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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 4.12 (Berkeley) 02/05/99 |
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5 * |
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6 * Rogue: Exploring the Dungeons of Doom |
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7 * Copyright (C) 1980-1983, 1985, 1999 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 #ifdef MASTER |
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18 int total = 0; /* total dynamic memory bytes */ |
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19 #endif |
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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(THING **list, THING *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: |
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41 * add an item to the head of a list |
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42 */ |
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43 |
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44 void |
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45 _attach(THING **list, THING *item) |
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46 { |
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47 if (*list != NULL) |
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48 { |
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49 item->l_next = *list; |
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50 (*list)->l_prev = item; |
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51 item->l_prev = NULL; |
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52 } |
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53 else |
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54 { |
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55 item->l_next = NULL; |
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56 item->l_prev = NULL; |
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57 } |
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58 *list = item; |
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59 } |
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60 |
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61 /* |
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62 * _free_list: |
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63 * Throw the whole blamed thing away |
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64 */ |
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65 |
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66 void |
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67 _free_list(THING **ptr) |
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68 { |
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69 THING *item; |
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70 |
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71 while (*ptr != NULL) |
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72 { |
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73 item = *ptr; |
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74 *ptr = next(item); |
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75 discard(item); |
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76 } |
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77 } |
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78 |
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79 /* |
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80 * discard: |
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81 * Free up an item |
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82 */ |
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83 |
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84 void |
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85 discard(THING *item) |
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86 { |
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87 #ifdef MASTER |
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88 total--; |
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89 #endif |
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90 free(item); |
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91 } |
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92 |
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93 /* |
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94 * new_item |
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95 * Get a new item with a specified size |
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96 */ |
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97 THING * |
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98 new_item(void) |
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99 { |
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100 THING *item; |
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101 |
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102 if ((item = calloc(1, sizeof *item)) == NULL) { |
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103 #ifdef MASTER |
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104 msg("ran out of memory after %d items", total); |
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105 #endif |
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106 return NULL; |
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107 } |
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108 |
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109 #ifdef MASTER |