Mercurial > hg > early-roguelike
annotate rogue5/chase.c @ 280:70aa5808c782
Fix potential segfaults at restore related to ctime().
In some games, restore() passes the result of ctime() to mvprintw() or
some other variadic message-formatting function. If ctime() has not
been declared properly, its return type is inferred to be int instead
of char *. This does not cause a warning because the compiler does not
know the correct type of variadic arguments.
On platforms where ints and pointers are not the same size, this can,
probably depending on alignment, result in a segfault that is not easy
to trace.
Including time.h fixes the problem. Some games manually declared
ctime() and avoided the bug. These declarations have also been
replaced with the include.
author | John "Elwin" Edwards |
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date | Fri, 15 Sep 2017 20:51:10 -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 * Code for one creature to chase another |
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3 * |
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4 * @(#)chase.c 4.57 (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 #define DRAGONSHOT 5 /* one chance in DRAGONSHOT that a dragon will flame */ |
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18 |
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19 static coord ch_ret; /* Where chasing takes you */ |
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20 |
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21 /* |
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22 * runners: |
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23 * Make all the running monsters move. |
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24 */ |
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25 void |
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26 runners(void) |
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27 { |
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28 THING *tp; |
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29 THING *next; |
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30 int wastarget; |
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31 coord orig_pos; |
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32 |
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33 for (tp = mlist; tp != NULL; tp = next) |
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34 { |
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35 /* remember this in case the monster's "next" is changed */ |
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36 next = next(tp); |
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37 if (!on(*tp, ISHELD) && on(*tp, ISRUN)) |
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38 { |
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39 orig_pos = tp->t_pos; |
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40 wastarget = on(*tp, ISTARGET); |
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41 if (move_monst(tp) == -1) |
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42 continue; |
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43 if (on(*tp, ISFLY) && dist_cp(&hero, &tp->t_pos) >= 3) |
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44 move_monst(tp); |
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45 if (wastarget && !ce(orig_pos, tp->t_pos)) |
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46 { |
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47 tp->t_flags &= ~ISTARGET; |
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48 to_death = FALSE; |
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49 } |
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50 } |
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51 } |
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52 if (has_hit) |
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53 { |
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54 endmsg(); |
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55 has_hit = FALSE; |
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56 } |
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57 } |
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58 |
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59 /* |
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60 * move_monst: |
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61 * Execute a single turn of running for a monster |
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62 */ |
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63 int |
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64 move_monst(THING *tp) |
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65 { |
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66 if (!on(*tp, ISSLOW) || tp->t_turn) |
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67 if (do_chase(tp) == -1) |
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68 return(-1); |
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69 if (on(*tp, ISHASTE)) |
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70 if (do_chase(tp) == -1) |
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71 return(-1); |
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72 tp->t_turn ^= TRUE; |
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73 return(0); |
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74 } |
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75 |
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76 /* |
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77 * relocate: |
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78 * Make the monster's new location be the specified one, updating |
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79 * all the relevant state. |
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80 */ |
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81 void |
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82 relocate(THING *th, const coord *new_loc) |
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83 { |
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84 struct room *oroom; |
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85 |
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86 if (!ce(*new_loc, th->t_pos)) |
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87 { |
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88 mvaddch(th->t_pos.y, th->t_pos.x, th->t_oldch); |
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89 th->t_room = roomin(new_loc); |
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90 set_oldch(th, new_loc); |
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91 oroom = th->t_room; |
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92 moat(th->t_pos.y, th->t_pos.x) = NULL; |
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93 |
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94 if (oroom != th->t_room) |
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95 th->t_dest = find_dest(th); |
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96 th->t_pos = *new_loc; |
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97 moat(new_loc->y, new_loc->x) = th; |
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98 } |
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99 move(new_loc->y, new_loc->x); |
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100 if (see_monst(th)) |
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101 addch(th->t_disguise); |
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102 else if (on(player, SEEMONST)) |
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103 { |
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104 standout(); |
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105 addch(th->t_type); |
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106 standend(); |
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107 } |
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