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+/*	$NetBSD: zap.c,v 1.9 2008/01/14 03:50:03 dholland Exp $	*/
+
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Timothy C. Stoehr.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)zap.c	8.1 (Berkeley) 5/31/93";
+#else
+__RCSID("$NetBSD: zap.c,v 1.9 2008/01/14 03:50:03 dholland Exp $");
+#endif
+#endif /* not lint */
+
+/*
+ * zap.c
+ *
+ * This source herein may be modified and/or distributed by anybody who
+ * so desires, with the following restrictions:
+ *    1.)  No portion of this notice shall be removed.
+ *    2.)  Credit shall not be taken for the creation of this source.
+ *    3.)  This code is not to be traded, sold, or used for personal
+ *         gain or profit.
+ *
+ */
+
+#include "rogue.h"
+
+static object *get_zapped_monster(short, short *, short *);
+static void tele_away(object *);
+static void wdrain_life(object *);
+static void zap_monster(object *, unsigned short);
+
+boolean wizard = 0;
+
+void
+zapp(void)
+{
+	short wch;
+	boolean first_miss = 1;
+	object *wand;
+	short dir, d, row, col;
+	object *monster;
+
+	while (!is_direction(dir = rgetchar(), &d)) {
+		sound_bell();
+		if (first_miss) {
+			messagef(0, "direction? ");
+			first_miss = 0;
+		}
+	}
+	check_message();
+	if (dir == CANCEL) {
+		return;
+	}
+	if ((wch = pack_letter("zap with what?", WAND)) == CANCEL) {
+		return;
+	}
+	check_message();
+
+	if (!(wand = get_letter_object(wch))) {
+		messagef(0, "no such item.");
+		return;
+	}
+	if (wand->what_is != WAND) {
+		messagef(0, "you can't zap with that");
+		return;
+	}
+	if (wand->class <= 0) {
+		messagef(0, "nothing happens");
+	} else {
+		wand->class--;
+		row = rogue.row; col = rogue.col;
+		if ((wand->which_kind == COLD) || (wand->which_kind == FIRE)) {
+			bounce((short)wand->which_kind, d, row, col, 0);
+		} else {
+			monster = get_zapped_monster(d, &row, &col);
+			if (wand->which_kind == DRAIN_LIFE) {
+				wdrain_life(monster);
+			} else if (monster) {
+				wake_up(monster);
+				s_con_mon(monster);
+				zap_monster(monster, wand->which_kind);
+				relight();
+			}
+		}
+	}
+	(void)reg_move();
+}
+
+static object *
+get_zapped_monster(short dir, short *row, short *col)
+{
+	short orow, ocol;
+
+	for (;;) {
+		orow = *row; ocol = *col;
+		get_dir_rc(dir, row, col, 0);
+		if (((*row == orow) && (*col == ocol)) ||
+		   (dungeon[*row][*col] & (HORWALL | VERTWALL)) ||
+		   (dungeon[*row][*col] == NOTHING)) {
+			return(0);
+		}
+		if (dungeon[*row][*col] & MONSTER) {
+			if (!imitating(*row, *col)) {
+				return(object_at(&level_monsters, *row, *col));
+			}
+		}
+	}
+}
+
+static void
+zap_monster(object *monster, unsigned short kind)
+{
+	short row, col;
+	object *nm;
+	short tc;
+
+	row = monster->row;
+	col = monster->col;
+
+	switch(kind) {
+	case SLOW_MONSTER:
+		if (monster->m_flags & HASTED) {
+			monster->m_flags &= (~HASTED);
+		} else {
+			monster->slowed_toggle = 0;
+			monster->m_flags |= SLOWED;
+		}
+		break;
+	case HASTE_MONSTER:
+		if (monster->m_flags & SLOWED) {
+			monster->m_flags &= (~SLOWED);
+		} else {
+			monster->m_flags |= HASTED;
+		}
+		break;
+	case TELE_AWAY:
+		tele_away(monster);
+		break;
+	case INVISIBILITY:
+		monster->m_flags |= INVISIBLE;
+		break;
+	case POLYMORPH:
+		if (monster->m_flags & HOLDS) {
+			being_held = 0;
+		}
+		nm = monster->next_monster;
+		tc = monster->trail_char;
+		(void)gr_monster(monster, get_rand(0, MONSTERS-1));
+		monster->row = row;
+		monster->col = col;
+		monster->next_monster = nm;
+		monster->trail_char = tc;
+		if (!(monster->m_flags & IMITATES)) {
+			wake_up(monster);
+		}
+		break;
+	case MAGIC_MISSILE:
+		rogue_hit(monster, 1);
+		break;
+	case CANCELLATION:
+		if (monster->m_flags & HOLDS) {
+			being_held = 0;
+		}
+		if (monster->m_flags & STEALS_ITEM) {
+			monster->drop_percent = 0;
+		}
+		monster->m_flags &= (~(FLIES | FLITS | SPECIAL_HIT | INVISIBLE |
+			FLAMES | IMITATES | CONFUSES | SEEKS_GOLD | HOLDS));
+		break;
+	case DO_NOTHING:
+		messagef(0, "nothing happens");
+		break;
+	}
+}
+
+static void
+tele_away(object *monster)
+{
+	short row, col;
+
+	if (monster->m_flags & HOLDS) {
+		being_held = 0;
+	}
+	gr_row_col(&row, &col, (FLOOR | TUNNEL | STAIRS | OBJECT));
+	mvaddch(monster->row, monster->col, monster->trail_char);
+	dungeon[monster->row][monster->col] &= ~MONSTER;
+	monster->row = row; monster->col = col;
+	dungeon[row][col] |= MONSTER;
+	monster->trail_char = mvinch(row, col);
+	if (detect_monster || rogue_can_see(row, col)) {
+		mvaddch(row, col, gmc(monster));
+	}
+}
+
+void
+wizardize(void)
+{
+	char buf[100];
+
+	if (wizard) {
+		wizard = 0;
+		messagef(0, "not wizard anymore");
+	} else {
+		if (get_input_line("wizard's password:", "", buf, sizeof(buf),
+				"", 0, 0)) {
+			(void)xxx(1);
+			xxxx(buf, strlen(buf));
+			if (!strncmp(buf, "\247\104\126\272\115\243\027", 7)) {
+				wizard = 1;
+				score_only = 1;
+				messagef(0, "Welcome, mighty wizard!");
+			} else {
+				messagef(0, "sorry");
+			}
+		}
+	}
+}
+
+static void
+wdrain_life(object *monster)
+{
+	short hp;
+	object *lmon, *nm;
+
+	hp = rogue.hp_current / 3;
+	rogue.hp_current = (rogue.hp_current + 1) / 2;
+
+	if (cur_room >= 0) {
+		lmon = level_monsters.next_monster;
+		while (lmon) {
+			nm = lmon->next_monster;
+			if (get_room_number(lmon->row, lmon->col) == cur_room) {
+				wake_up(lmon);
+				(void)mon_damage(lmon, hp);
+			}
+			lmon = nm;
+		}
+	} else {
+		if (monster) {
+			wake_up(monster);
+			(void)mon_damage(monster, hp);
+		}
+	}
+	print_stats(STAT_HP);
+	relight();
+}
+
+void
+bounce(short ball, short dir, short row, short col, short r)
+{
+	short orow, ocol;
+	const char *s;
+	short i, ch, new_dir = -1, damage;
+	static short btime;
+
+	if (++r == 1) {
+		btime = get_rand(3, 6);
+	} else if (r > btime) {
+		return;
+	}
+
+	if (ball == FIRE) {
+		s = "fire";
+	} else {
+		s = "ice";
+	}
+	if (r > 1) {
+		messagef(0, "the %s bounces", s);
+	}
+	orow = row;
+	ocol = col;
+	do {
+		ch = mvinch(orow, ocol);
+		standout();
+		mvaddch(orow, ocol, ch);
+		get_dir_rc(dir, &orow, &ocol, 1);
+	} while (!(	(ocol <= 0) ||
+				(ocol >= DCOLS-1) ||
+				(dungeon[orow][ocol] == NOTHING) ||
+				(dungeon[orow][ocol] & MONSTER) ||
+				(dungeon[orow][ocol] & (HORWALL | VERTWALL)) ||
+				((orow == rogue.row) && (ocol == rogue.col))));
+	standend();
+	refresh();
+	do {
+		orow = row;
+		ocol = col;
+		ch = mvinch(row, col);
+		mvaddch(row, col, ch);
+		get_dir_rc(dir, &row, &col, 1);
+	} while (!(	(col <= 0) ||
+				(col >= DCOLS-1) ||
+				(dungeon[row][col] == NOTHING) ||
+				(dungeon[row][col] & MONSTER) ||
+				(dungeon[row][col] & (HORWALL | VERTWALL)) ||
+				((row == rogue.row) && (col == rogue.col))));
+
+	if (dungeon[row][col] & MONSTER) {
+		object *monster;
+
+		monster = object_at(&level_monsters, row, col);
+
+		wake_up(monster);
+		if (rand_percent(33)) {
+			messagef(0, "the %s misses the %s", s,
+				mon_name(monster));
+			goto ND;
+		}
+		if (ball == FIRE) {
+			if (!(monster->m_flags & RUSTS)) {
+				if (monster->m_flags & FREEZES) {
+					damage = monster->hp_to_kill;
+				} else if (monster->m_flags & FLAMES) {
+					damage = (monster->hp_to_kill / 10) + 1;
+				} else {
+					damage = get_rand((rogue.hp_current / 3), rogue.hp_max);
+				}
+			} else {
+				damage = (monster->hp_to_kill / 2) + 1;
+			}
+			messagef(0, "the %s hits the %s", s,
+				mon_name(monster));
+			(void)mon_damage(monster, damage);
+		} else {
+			damage = -1;
+			if (!(monster->m_flags & FREEZES)) {
+				if (rand_percent(33)) {
+					messagef(0, "the monster is frozen");
+					monster->m_flags |= (ASLEEP | NAPPING);
+					monster->nap_length = get_rand(3, 6);
+				} else {
+					damage = rogue.hp_current / 4;
+				}
+			} else {
+				damage = -2;
+			}
+			if (damage != -1) {
+				messagef(0, "the %s hits the %s", s,
+					mon_name(monster));
+				(void)mon_damage(monster, damage);
+			}
+		}
+	} else if ((row == rogue.row) && (col == rogue.col)) {
+		if (rand_percent(10 + (3 * get_armor_class(rogue.armor)))) {
+			messagef(0, "the %s misses", s);
+			goto ND;
+		} else {
+			damage = get_rand(3, (3 * rogue.exp));
+			if (ball == FIRE) {
+				damage = (damage * 3) / 2;
+				damage -= get_armor_class(rogue.armor);
+			}
+			rogue_damage(damage, NULL,
+					((ball == FIRE) ? KFIRE : HYPOTHERMIA));
+			messagef(0, "the %s hits", s);
+		}
+	} else {
+		short nrow, ncol;
+
+ND:		for (i = 0; i < 10; i++) {
+			dir = get_rand(0, DIRS-1);
+			nrow = orow;
+			ncol = ocol;
+			get_dir_rc(dir, &nrow, &ncol, 1);
+			if (((ncol >= 0) && (ncol <= DCOLS-1)) &&
+				(dungeon[nrow][ncol] != NOTHING) &&
+				(!(dungeon[nrow][ncol] & (VERTWALL | HORWALL)))) {
+				new_dir = dir;
+				break;
+			}
+		}
+		if (new_dir != -1) {
+			bounce(ball, new_dir, orow, ocol, r);
+		}
+	}
+}