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annotate arogue7/weapons.c @ 227:696277507a2e

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Rogue V4, V5: disable a cheat granting permanent monster detection. In these two games, a potion of monster detection turns on the player's SEEMONST flag. A fuse is set to call turn_see() to turn the flag back off. But the save and restore functions do not recognize turn_see() and fail to set the fuse up again. When restoring, Rogue V4 merely sets the fuse's function to NULL and leaves it burning. When it goes off, a segfault results. Rogue V5 clears all the fuse's fields, and the player retains the ability to see all monsters on the level. The save and restore code can now handle the fuse. The function used is a new wrapper, turn_see_off(), which should lead to less problems with daemons being multiple incompatible types. Also, Rogue V4 and Super-Rogue now properly clear unrecognized daemon and fuse slots when restoring a saved game.
author John "Elwin" Edwards
date Sat, 05 Mar 2016 12:10:20 -0500
parents f9ef86cf22b2
children 28e22fb35989
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1 /*
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2 * weapons.c - Functions for dealing with problems brought about by weapons
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3 *
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4 * Advanced Rogue
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5 * Copyright (C) 1984, 1985, 1986 Michael Morgan, Ken Dalka and AT&T
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6 * All rights reserved.
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7 *
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8 * Based on "Rogue: Exploring the Dungeons of Doom"
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9 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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10 * All rights reserved.
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11 *
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12 * See the file LICENSE.TXT for full copyright and licensing information.
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13 */
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14
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15 /*
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16 * Functions for dealing with problems brought about by weapons
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17 *
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18 */
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19
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20 #include "curses.h"
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21 #include <ctype.h>
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22 #include <string.h>
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23 #include "rogue.h"
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24
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25 void
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26 boomerang(int ydelta, int xdelta, struct linked_list *item, struct thing *tp)
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27 {
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28 register struct object *obj;
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29 struct thing midpoint;
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30 coord oldpos;
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31
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32 obj = OBJPTR(item);
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33 oldpos = obj->o_pos;
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34
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35 /*
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36 * make it appear to fly at the target
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37 */
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38 do_motion(obj, ydelta, xdelta, tp);
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39 hit_monster(unc(obj->o_pos), obj, tp);
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40
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41 /*
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42 * Now let's make it fly back to the wielder. We need to
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43 * use midpoint to fool do_motion into thinking the action
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44 * starts there. Do_motion only looks at the t_pos field.
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45 */
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46 midpoint.t_pos = obj->o_pos; /* Simulate a new start position */
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47 do_motion(obj, -ydelta, -xdelta, &midpoint);
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48
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49 obj->o_pos = oldpos;
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50 }
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51
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52 /*
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53 * do the actual motion on the screen done by an object traveling
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54 * across the room. Note that we should not look at any field in
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55 * tp other than t_pos unless we change boomerang().
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56 */
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57 void
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58 do_motion(struct object *obj, int ydelta, int xdelta, struct thing *tp)
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59 {
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60
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61 /*
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62 * Come fly with us ...
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63 */
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64 obj->o_pos = tp->t_pos;
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65 for (; ;) {
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66 register int ch;
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67 /*
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68 * Erase the old one
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69 */
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70 if (!ce(obj->o_pos, tp->t_pos) &&
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71 cansee(unc(obj->o_pos)) &&
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72 mvwinch(cw, obj->o_pos.y, obj->o_pos.x) != ' ') {
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73 mvwaddch(cw, obj->o_pos.y, obj->o_pos.x, show(obj->o_pos.y, obj->o_pos.x));
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74 }
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75 /*
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76 * Get the new position
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77 */
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78 obj->o_pos.y += ydelta;
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79 obj->o_pos.x += xdelta;
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80 if (shoot_ok(ch = winat(obj->o_pos.y, obj->o_pos.x)) && ch != DOOR && !ce(obj->o_pos, hero)) {
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81 /*
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82 * It hasn't hit anything yet, so display it
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83 * If it alright.
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84 */
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85 if (cansee(unc(obj->o_pos)) &&
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86 mvwinch(cw, obj->o_pos.y, obj->o_pos.x) != ' ') {
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87 mvwaddch(cw, obj->o_pos.y, obj->o_pos.x, obj->o_type);
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88 draw(cw);
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89 }
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