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annotate rogue3/misc.c @ 314:2f0eb38da609

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Advanced Rogue 7: fix a crash when casting magic missile. do_zap() dereferenced a struct object pointer while ignoring the result of a NULL check. XRogue had the same problem, though triggering it was unlikely, since XRogue does not include a magic missile spell. Reported by John Harris of @Play.
author John "Elwin" Edwards
date Thu, 21 Oct 2021 21:00:15 -0400
parents e52a8a7ad4c5
children
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1 /*
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2 * all sorts of miscellaneous routines
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3 *
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4 * @(#)misc.c 3.13 (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 #include <ctype.h>
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16
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17 /*
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18 * tr_name:
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19 * print the name of a trap
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20 */
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21
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22 char *
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23 tr_name(int ch)
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24 {
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25 char *s = "";
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26
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27 switch (ch)
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28 {
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29 case TRAPDOOR:
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30 s = terse ? "A trapdoor." : "You found a trapdoor.";
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31 when BEARTRAP:
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32 s = terse ? "A beartrap." : "You found a beartrap.";
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33 when SLEEPTRAP:
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34 s = terse ? "A sleeping gas trap.":"You found a sleeping gas trap.";
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35 when ARROWTRAP:
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36 s = terse ? "An arrow trap." : "You found an arrow trap.";
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37 when TELTRAP:
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38 s = terse ? "A teleport trap." : "You found a teleport trap.";
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39 when DARTTRAP:
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40 s = terse ? "A dart trap." : "You found a poison dart trap.";
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41 }
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42 return s;
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43 }
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44
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45 /*
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46 * Look:
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47 * A quick glance all around the player
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48 */
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49
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50 void
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51 look(int wakeup)
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52 {
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53 int x, y;
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54 int ch;
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55 int oldx, oldy;
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56 int inpass;
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57 int passcount = 0;
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58 struct room *rp;
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59 int ey, ex;
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60
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61 getyx(cw, oldy, oldx);
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62 if (oldrp != NULL && (oldrp->r_flags & ISDARK) && off(player, ISBLIND))
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63 {
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64 for (x = oldpos.x - 1; x <= oldpos.x + 1; x++)
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65 for (y = oldpos.y - 1; y <= oldpos.y + 1; y++)
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66 if ((y != hero.y || x != hero.x) && show(y, x) == FLOOR)
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67 mvwaddch(cw, y, x, ' ');
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68 }
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69 inpass = ((rp = roomin(&hero)) == NULL);
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70 ey = hero.y + 1;
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71 ex = hero.x + 1;
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72 for (x = hero.x - 1; x <= ex; x++)
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73 if (x >= 0 && x < COLS) for (y = hero.y - 1; y <= ey; y++)
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74 {
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75 if (y <= 0 || y >= LINES - 1)
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76 continue;
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77 if (isupper(mvwinch(mw, y, x)))
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78 {
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79 struct linked_list *it;
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80 struct thing *tp;
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81
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82 if (wakeup)
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83 it = wake_monster(y, x);
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84 else
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85 it = find_mons(y, x);
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86 tp = (struct thing *) ldata(it);
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87 if ((tp->t_oldch = mvinch(y, x)) == TRAP)
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88 tp->t_oldch =
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89 (trap_at(y,x)->tr_flags&ISFOUND) ? TRAP : FLOOR;
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90 if (tp->t_oldch == FLOOR && (rp != NULL) && (rp->r_flags & ISDARK)
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91 && off(player, ISBLIND))
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92 tp->t_oldch = ' ';
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93 }
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94 /*
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95 * Secret doors show as walls
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96 */
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97 if ((ch = show(y, x)) == SECRETDOOR)
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98 ch = secretdoor(y, x);
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99 /*
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100 * Don't show room walls if he is in a passage
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101 */
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102 if (off(player, ISBLIND))
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103 {
304
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104 if ((y == hero.y && x == hero.x)
0
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105 || (inpass && (ch == '-' || ch == '|')))
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