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annotate rogue3/chase.c @ 310:827441d05b3e

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Advanced Rogue family: fix some potential buffer overflows. Some code for determining the score file location assumed that PATH_MAX would be less than 1024, which cannot be guaranteed. Advanced Rogue 5 and 7, and XRogue, have had the buffers for the file name enlarged. UltraRogue never called the functions, so the code has been deleted instead.
author John "Elwin" Edwards
date Mon, 03 May 2021 19:05:37 -0400
parents d9e44e18eeec
children
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1 /*
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2 * Code for one object to chase another
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3 *
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4 * @(#)chase.c 3.17 (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 "rogue.h"
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15
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16 coord ch_ret; /* Where chasing takes you */
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17
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18 /*
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19 * runners:
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20 * Make all the running monsters move.
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21 */
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22
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23 void
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24 runners()
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25 {
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26 struct linked_list *item;
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27 struct thing *tp;
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28
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29 for (item = mlist; item != NULL;)
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30 {
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31 tp = (struct thing *) ldata(item);
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32 item = next(item);
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33 if (off(*tp, ISHELD) && on(*tp, ISRUN))
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34 {
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35 if (off(*tp, ISSLOW) || tp->t_turn)
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36 if (do_chase(tp) == -1)
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37 continue;
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38 if (on(*tp, ISHASTE))
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39 if (do_chase(tp) == -1)
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40 continue;
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41 tp->t_turn ^= TRUE;
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42 }
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43 }
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44 }
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45
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46 /*
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47 * do_chase:
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48 * Make one thing chase another.
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49 */
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50
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51 int
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52 do_chase(struct thing *th)
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53 {
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54 struct room *rer, *ree; /* room of chaser, room of chasee */
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55 int mindist = 32767, i, dist;
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56 int stoprun = FALSE; /* TRUE means we are there */
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57 int sch;
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58 coord this; /* Temporary destination for chaser */
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59
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60 rer = roomin(&th->t_pos); /* Find room of chaser */
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61 ree = roomin(th->t_dest); /* Find room of chasee */
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62 /*
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63 * We don't count doors as inside rooms for this routine
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64 */
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65 if (mvwinch(stdscr, th->t_pos.y, th->t_pos.x) == DOOR)
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66 rer = NULL;
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67 this = *th->t_dest;
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68 /*
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69 * If the object of our desire is in a different room,
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70 * than we are and we ar not in a corridor, run to the
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71 * door nearest to our goal.
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72 */
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73 if (rer != NULL && rer != ree)
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74 for (i = 0; i < rer->r_nexits; i++) /* loop through doors */
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75 {
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76 dist = DISTANCE(th->t_dest->y, th->t_dest->x,
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77 rer->r_exit[i].y, rer->r_exit[i].x);
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78 if (dist < mindist) /* minimize distance */
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79 {
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80 this = rer->r_exit[i];
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81 mindist = dist;
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82 }
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83 }
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84 /*
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85 * this now contains what we want to run to this time
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86 * so we run to it. If we hit it we either want to fight it
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87 * or stop running
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88 */
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89 if (!chase(th, &this))
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90 {
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91 if (ce(this, hero))
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92 {
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93 return( attack(th) );
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94 }
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95 else if (th->t_type != 'F')
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96 stoprun = TRUE;
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97 }
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98 else if (th->t_type == 'F')
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99 return(0);
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100 mvwaddch(cw, th->t_pos.y, th->t_pos.x, th->t_oldch);
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101 sch = mvwinch(cw, ch_ret.y, ch_ret.x);
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102 if (rer != NULL && (rer->r_flags & ISDARK) && sch == FLOOR
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103 && DISTANCE(ch_ret.y, ch_ret.x, th->t_pos.y, th->t_pos.x) < 3
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104 && off(player, ISBLIND))
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105 th->t_oldch = ' ';
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