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annotate rogue5/chase.c @ 110:5f51f7d9805f

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arogue5: fix some save/restore-related crashes. The save/restore code took the pointer intended as an argument for the doctor() daemon and wrote it to the savefile as an int. I don't know why it took so long to fail horribly. The problem has been avoided by replacing the value with &player when restoring. That seems to be the only argument ever actually used. The code also writes only four bytes for an unsigned long; if sizeof(long) == 8, it casts to unsigned int first. It failed to do the cast when reading back, with the result that four bytes were read and the other half of the number was effectively uninitialized. It apparently works now, but the save/restore code ought still to be regarded as decidedly unfortunate.
author John "Elwin" Edwards
date Mon, 06 Jan 2014 15:57:17 -0500
parents f502bf60e6e4
children
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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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