/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* hack.c - version 1.0.3 */

#include <stdio.h>
#include "hack.h"
#ifdef UNIX
static	char	SCCS_Id[] = "@(#)hack.c	1.3\t87/07/14";
#endif
extern char news0();
extern char *nomovemsg;
extern char *exclam();
extern struct obj *addinv();
extern boolean hmon();

/* called on movement:
	1. when throwing ball+chain far away
	2. when teleporting
	3. when walking out of a lit room
 */
unsee() {
	register x,y;
	register struct rm *lev;

/*
	if(u.udispl){
		u.udispl = 0;
		newsym(u.udisx, u.udisy);
	}
*/
#ifndef QUEST
	if(seehx){
		seehx = 0;
	} else
#endif
	for(x = u.ux-1; x < u.ux+2; x++)
	  for(y = u.uy-1; y < u.uy+2; y++) {
		if(!isok(x, y)) continue;
		lev = &levl[x][y];
#ifdef DGK
		if(!lev->lit && lev->scrsym == symbol.room) {
#else
		if(!lev->lit && lev->scrsym == '.') {
#endif
			lev->scrsym =' ';
			lev->new = 1;
			on_scr(x,y);
		}
	}
}

/* called:
	in apply.c:  seeoff(0) - when taking a picture of yourself
	in do.c:     seeoff(0) - blind after drinking potion
	in do.c:     seeoff(1) - go up or down the stairs
	in eat.c:    seeoff(0) - blind after eating rotten food
	in mhitu.c:  seeoff(0) - blinded by a yellow light
	in mon.c:    seeoff(1) - swallowed
	in potion.c: seeoff(0) - quaffing or sniffing a potion of blindness
	in spell.c:  seeoff(0) - due to a cursed spellbook
	in trap.c:   seeoff(1) - fall through trapdoor
	in wizard.c: seeoff(0) - hit by a cream pie.
 */
seeoff(mode)	/* 1 to redo @, 0 to leave them */
{	/* 1 means misc movement, 0 means blindness */
	register x,y;
	register struct rm *lev;

	if(u.udispl && mode){
		u.udispl = 0;
		levl[u.udisx][u.udisy].scrsym = news0(u.udisx,u.udisy);
	}
#ifndef QUEST
	if(seehx) {
		seehx = 0;
	} else
#endif
	if(!mode) {
		for(x = u.ux-1; x < u.ux+2; x++)
			for(y = u.uy-1; y < u.uy+2; y++) {
				if(!isok(x, y)) continue;
				lev = &levl[x][y];
#ifdef DGK
				if(!lev->lit && lev->scrsym == symbol.room)
#else
				if(!lev->lit && lev->scrsym == '.')
#endif
					lev->seen = 0;
			}
	}
}

static
moverock() {
	register xchar rx, ry;
	register struct obj *otmp;
	register struct trap *ttmp;

	while(otmp = sobj_at(ENORMOUS_ROCK, u.ux+u.dx, u.uy+u.dy)) {
		rx = u.ux+2*u.dx;
		ry = u.uy+2*u.dy;
		nomul(0);
		if(isok(rx,ry) && !IS_ROCK(levl[rx][ry].typ) &&
		    (levl[rx][ry].typ != DOOR || !(u.dx && u.dy)) &&
		    !sobj_at(ENORMOUS_ROCK, rx, ry)) {
			if(m_at(rx,ry)) {
			    pline("You hear a monster behind the rock.");
			    pline("Perhaps that's why you cannot move it.");
			    goto cannot_push;
			}
			if(ttmp = t_at(rx,ry))
			    switch(ttmp->ttyp) {
			    case PIT:
				pline("You push the rock into a pit!");
				deltrap(ttmp);
				delobj(otmp);
				pline("It completely fills the pit!");
				continue;
			    case TELEP_TRAP:
				pline("You push the rock and suddenly it disappears!");
				delobj(otmp);
				continue;
			    }
			if(levl[rx][ry].typ == POOL) {
				levl[rx][ry].typ = ROOM;
				mnewsym(rx,ry);
				prl(rx,ry);
				pline("You push the rock into the water.");
				pline("Now you can cross the water!");
				delobj(otmp);
				continue;
			}
			otmp->ox = rx;
			otmp->oy = ry;
			/* pobj(otmp); */
			if(cansee(rx,ry)) atl(rx,ry,otmp->olet);
			if(Invisible) newsym(u.ux+u.dx, u.uy+u.dy);

			{ static long lastmovetime;
			/* note: this var contains garbage initially and
			   after a restore */
			if(moves > lastmovetime+2 || moves < lastmovetime)
			pline("With great effort you move the enormous rock.");
			lastmovetime = moves;
			}
		} else {
		    pline("You try to move the enormous rock, but in vain.");
	    cannot_push:
#ifdef KAA
		    if (u.usym=='9') {
# ifdef DGKMOD
			if(!flags.pickup)
				pline("You easily can push it aside.");
			else
# endif
				pline("However, you easily can pick it up.");
			break;
		    }
#endif
		    if((!invent || inv_weight()+90 <= 0) &&
			(!u.dx || !u.dy || (IS_ROCK(levl[u.ux][u.uy+u.dy].typ)
					&& IS_ROCK(levl[u.ux+u.dx][u.uy].typ)))){
			pline("However, you can squeeze yourself into a small opening.");
			break;
		    } else
			return (-1);
		}
	}
	return (0);
}

domove()
{
	register struct monst *mtmp;
	register struct rm *tmpr,*ust;
	struct trap *trap;
	register struct obj *otmp;

	u_wipe_engr(rnd(5));

	if(inv_weight() > 0){
		pline("You collapse under your load.");
		nomul(0);
		return;
	}
	if(u.uswallow) {
		u.dx = u.dy = 0;
		u.ux = u.ustuck->mx;
		u.uy = u.ustuck->my;
	} else {
		if(Confusion) {
			do {
				confdir();
			} while(!isok(u.ux+u.dx, u.uy+u.dy) ||
			    IS_ROCK(levl[u.ux+u.dx][u.uy+u.dy].typ));
		}
		if(!isok(u.ux+u.dx, u.uy+u.dy)){
			nomul(0);
			return;
		}
	}

	ust = &levl[u.ux][u.uy];
	u.ux0 = u.ux;
	u.uy0 = u.uy;
	if(!u.uswallow && (trap = t_at(u.ux+u.dx, u.uy+u.dy)) && trap->tseen)
		nomul(0);
	if(u.ustuck && !u.uswallow && (u.ux+u.dx != u.ustuck->mx ||
		u.uy+u.dy != u.ustuck->my)) {
		if(dist(u.ustuck->mx, u.ustuck->my) > 2){
			/* perhaps it fled (or was teleported or ... ) */
			u.ustuck = 0;
		} else {
			if(Blind) pline("You cannot escape from it!");
			else pline("You cannot escape from %s!",
				monnam(u.ustuck));
			nomul(0);
			return;
		}
	}
	if(u.uswallow || (mtmp = m_at(u.ux+u.dx,u.uy+u.dy))) {
	/* attack monster */

#ifdef SAFE_ATTACK
		/* Don't attack if you're running */
		if (flags.run && !mtmp->mimic
		&& (Blind ? Telepat : (!mtmp->minvis || See_invisible))) {
			nomul(0);
			flags.move = 0;
			return;
		}
#endif
		nomul(0);
		gethungry();
		if(multi < 0) return;	/* we just fainted */

		/* try to attack; note that it might evade */
		if(attack(u.uswallow ? u.ustuck : mtmp))
			return;
	}
	/* not attacking an animal, so we try to move */
	if(u.utrap) {
		if(u.utraptype == TT_PIT) {
			pline("You are still in a pit.");
			u.utrap--;
		} else {
			pline("You are caught in a beartrap.");
			if((u.dx && u.dy) || !rn2(5)) u.utrap--;
		}
		return;
	}
	tmpr = &levl[u.ux+u.dx][u.uy+u.dy];
	if(IS_ROCK(tmpr->typ) ||
	   (u.dx && u.dy && (tmpr->typ == DOOR || ust->typ == DOOR))){
		flags.move = 0;
		nomul(0);
		return;
	}
	if(moverock() < 0) return;
	if(u.dx && u.dy && IS_ROCK(levl[u.ux][u.uy+u.dy].typ) &&
		IS_ROCK(levl[u.ux+u.dx][u.uy].typ) &&
		invent && inv_weight()+40 > 0) {
		pline("You are carrying too much to get through.");
		nomul(0);
		return;
	}
	if(Punished &&
	   DIST(u.ux+u.dx, u.uy+u.dy, uchain->ox, uchain->oy) > 2){
		if(carried(uball)) {
			movobj(uchain, u.ux, u.uy);
			goto nodrag;
		}

		if(DIST(u.ux+u.dx, u.uy+u.dy, uball->ox, uball->oy) < 3){
			/* leave ball, move chain under/over ball */
			movobj(uchain, uball->ox, uball->oy);
			goto nodrag;
		}

		if(inv_weight() + (int) uball->owt/2 > 0) {
			pline("You cannot %sdrag the heavy iron ball.",
			invent ? "carry all that and also " : "");
			nomul(0);
			return;
		}

		movobj(uball, uchain->ox, uchain->oy);
		unpobj(uball);		/* BAH %% */
		uchain->ox = u.ux;
		uchain->oy = u.uy;
		nomul(-2);
		nomovemsg = "";
	nodrag:	;
	}
	u.ux += u.dx;
	u.uy += u.dy;
	if(flags.run) {
		if(tmpr->typ == DOOR ||
		(xupstair == u.ux && yupstair == u.uy) ||
		(xdnstair == u.ux && ydnstair == u.uy)
#ifdef FOUNTAINS
		|| IS_FOUNTAIN(levl[u.ux][u.uy].typ)
#endif
#ifdef NEWCLASS
		|| IS_THRONE(levl[u.ux][u.uy].typ)
#endif
		)
			nomul(0);
	}

	if(tmpr->typ == POOL && !Levitation)
		drown();	/* not necessarily fatal */

/*
	if(u.udispl) {
		u.udispl = 0;
		newsym(u.ux0,u.uy0);
	}
*/
	if(!Blind) {
#ifdef QUEST
		setsee();
#else
		if(ust->lit) {
			if(tmpr->lit) {
				if(tmpr->typ == DOOR)
					prl1(u.ux+u.dx,u.uy+u.dy);
				else if(ust->typ == DOOR)
					nose1(u.ux0-u.dx,u.uy0-u.dy);
			} else {
				unsee();
				prl1(u.ux+u.dx,u.uy+u.dy);
			}
		} else {
			if(tmpr->lit) setsee();
			else {
				prl1(u.ux+u.dx,u.uy+u.dy);
				if(tmpr->typ == DOOR) {
					if(u.dy) {
						prl(u.ux-1,u.uy);
						prl(u.ux+1,u.uy);
					} else {
						prl(u.ux,u.uy-1);
						prl(u.ux,u.uy+1);
					}
				}
			}
			nose1(u.ux0-u.dx,u.uy0-u.dy);
		}
#endif /* QUEST /**/
	} else {
		pru();
	}
	if(!flags.nopick) pickup(1);
	if(trap) dotrap(trap);		/* fall into pit, arrow trap, etc. */
	(void) inshop();
	if(!Blind) read_engr_at(u.ux,u.uy);
}

movobj(obj, ox, oy)
register struct obj *obj;
register int ox, oy;
{
	/* Some dirty programming to get display right */
	freeobj(obj);
	unpobj(obj);
	obj->nobj = fobj;
	fobj = obj;
	obj->ox = ox;
	obj->oy = oy;
}

dopickup(){
	/* uswallow case added by GAN 01/29/87 */
	if(u.uswallow)  {
		pline("You pick up %s's tongue.",monnam(u.ustuck));
		pline("But it's kind of slimy, so you drop it.");
		return(1);
	}
	if(!g_at(u.ux,u.uy) && !o_at(u.ux,u.uy)) {
		pline("There is nothing here to pick up.");
		return(0);
	}
	if(Levitation) {
		pline("You cannot reach the floor.");
		return(1);
	}
	pickup(0);
	return(1);
}

pickup(all)
{
	register struct gold *gold;
	register struct obj *obj, *obj2;
	register int wt;
	char buf[BUFSZ];
	register char *ip;
	register char sym;
	register int oletct = 0, iletct = 0;
	char olets[20], ilets[20];

	if(Levitation) return;
#ifdef DGKMOD
	if (all && !flags.pickup) {
		int ct = 0;

		for (obj = fobj; obj; obj = obj->nobj)
			if (obj->ox == u.ux && obj->oy == u.uy)
				if (!Punished || obj != uchain)
					ct++;
		/* If gold is the only thing here, pick it up.
		 */
		if (!ct && g_at(u.ux, u.uy)) {
			if (flags.run) nomul(0);
			while (gold = g_at(u.ux,u.uy)) {
				pline("%ld gold piece%s.", gold->amount,
					plur(gold->amount));
				u.ugold += gold->amount;
				flags.botl = 1;
				freegold(gold);
			}
			if (Invisible) newsym(u.ux,u.uy);
		}

		/* If there are objects here, take a look.
		 */
		if (ct) {
			if (flags.run)
				nomul(0);
			nscr();
			if (ct < 5)
				dolook();
			else
				pline("There are several objects here.");
		}
		return;
	}
#endif
	while(gold = g_at(u.ux,u.uy)) {
		pline("%ld gold piece%s.", gold->amount, plur(gold->amount));
		u.ugold += gold->amount;
		flags.botl = 1;
		freegold(gold);
		if(flags.run) nomul(0);
		if(Invisible) newsym(u.ux,u.uy);
	}
	/* check for more than one object */
	if(!all) {
		register int ct = 0;

		for(obj = fobj; obj; obj = obj->nobj)
			if(obj->ox == u.ux && obj->oy == u.uy) ct++;
		if(g_at(u.ux,u.uy))
			ct++;
		if(ct < 2)
			all++;
		else
			pline("There are several objects here.");
	}

	/* added by GAN 10/24/86 to allow selective picking up */
	if(!all)  {
		register struct obj *otmp = fobj;

		if(g_at(u.ux,u.uy)) ilets[iletct++] = '$';
		ilets[iletct] = 0;
		while(otmp) {
			if(!index(ilets, otmp->olet) &&
			   otmp->ox == u.ux && otmp->oy == u.uy)  {
				ilets[iletct++] = otmp->olet;
				ilets[iletct] = 0;
			}
			otmp = otmp->nobj;
		}        
		if(iletct == 1)
			strcpy(buf,ilets);
		else  {
			ilets[iletct++] = ' ';
			ilets[iletct++] = 'a';
			ilets[iletct++] = 'A';
			ilets[iletct] = 0;

			if(iletct = 3)    
			pline("What kinds of thing do you want to pick up? [%s]", ilets);
			getlin(buf);
			if(buf[0] == '\033') {
				clrlin();
				return(0);
			}
		}
		ip = buf;
		olets[0] = 0;
		while(sym = *ip++){
			/* new A function (selective all) added by
			 * GAN 01/09/87
			 */
			if(sym == 'A')  {
				for(oletct = 0; ilets[oletct] != ' '; oletct++)
					olets[oletct] = ilets[oletct];
				olets[oletct] = 0;
				break;
			}
			if(sym == ' ') continue;
			if(sym == 'a') all++; else
			if(index(ilets, sym)){
				if(!index(olets, sym)){
					olets[oletct++] = sym;
					olets[oletct] = 0;
				}
			}
			else pline("There are no %c's here.", sym);
		}        
	}

	if(all || index(olets,'$'))
		while(gold = g_at(u.ux,u.uy)) {
			pline("%ld gold piece%s.", gold->amount,
			   plur(gold->amount));
			u.ugold += gold->amount;
			flags.botl = 1;
			freegold(gold);
			if(flags.run) nomul(0);
			if(Invis) newsym(u.ux,u.uy);
	}


	for(obj = fobj; obj; obj = obj2) {
	    obj2 = obj->nobj;   /* perhaps obj will be picked up */
	    if(obj->ox == u.ux && obj->oy == u.uy) {
		if(flags.run) nomul(0);

		if(!all)  {
			char c;
		       
			if(!index(olets,obj->olet)) continue;
 
			pline("Pick up %s ? [ynaq]", doname(obj));
			while(!index("ynaq ", (c = readchar())))
				bell();
			if(c == 'q') return;
			if(c == 'n') continue;
			if(c == 'a') all = 1;
		}
 
		if(obj->otyp == DEAD_COCKATRICE && !uarmg && u.usym != 'c') {
		    pline("Touching the dead cockatrice is a fatal mistake.");
		    pline("You turn to stone.");
		    pline("You die...");
		    killer = "cockatrice cadaver";
		    done("died");
		}        
 
		if(obj->otyp == SCR_SCARE_MONSTER){
		  if(!obj->spe) obj->spe = 1;
		  else {
		    /* Note: perhaps the 1st pickup failed: you cannot
			carry anymore, and so we never dropped it -
			lets assume that treading on it twice also
			destroys the scroll */
		    pline("The scroll turns to dust as you pick it up.");
#ifdef KAA
			if(!(objects[SCR_SCARE_MONSTER].oc_name_known) &&
			   !(objects[SCR_SCARE_MONSTER].oc_uname))
				docall(obj);
#endif
		    delobj(obj);
		    continue;
		  }
		}
		   
		/* do not pick up uchain */
		if(Punished && obj == uchain)
			continue;

				  
		wt = inv_weight() + obj->owt;
		if(wt > 0) {
			if(obj->quan > 1) {
				/* see how many we can lift */
				extern struct obj *splitobj();
				int savequan = obj->quan;
				int iw = inv_weight();
				int qq;
				for(qq = 1; qq < savequan; qq++){
					obj->quan = qq;
					if(iw + weight(obj) > 0)
						break;
				}
				obj->quan = savequan;
				qq--;
				/* we can carry qq of them */
				if(!qq) goto too_heavy;
			pline("You can only carry %s of the %s lying here.",
					(qq == 1) ? "one" : "some",
					doname(obj));
				(void) splitobj(obj, qq);
				/* note: obj2 is set already, so well never
				 * encounter the other half; if it should be
				 * otherwise then write
				 *      obj2 = splitobj(obj,qq);
				 */
				goto lift_some;
			}          
		too_heavy:
			pline("There %s %s here, but %s.",
				(obj->quan == 1) ? "is" : "are",
				doname(obj),
				!invent ? "it is too heavy for you to lift"
				/* There is no such word as "anymore". KAA */
					: "you cannot carry any more");
			break;
		}
	lift_some:
		if(inv_cnt() >= 52) {
		    pline("Your knapsack cannot accomodate any more items.");
		    break;
		}
		if(wt > -5) pline("You have a little trouble lifting");
		freeobj(obj);
		if(Invisible) newsym(u.ux,u.uy);
		addtobill(obj);       /* sets obj->unpaid if necessary */
		{ int pickquan = obj->quan;
		  int mergquan;
#ifdef KAA
		if(!Blind) if(obj->olet != WEAPON_SYM) obj->dknown = 1;
#else
		if(!Blind) obj->dknown = 1;     /* this is done by prinv(),
				 but addinv() needs it already for merging */
#endif
		obj = addinv(obj);    /* might merge it with other objects */
		  mergquan = obj->quan;
		  obj->quan = pickquan; /* to fool prinv() */
		prinv(obj);
		  obj->quan = mergquan;
		}
	    }
	}
}

/* stop running if we see something interesting */
/* turn around a corner if that is the only way we can proceed */
/* do not turn left or right twice */
lookaround(){
register x,y,i,x0,y0,m0,i0 = 9;
register int corrct = 0, noturn = 0;
register struct monst *mtmp;
#ifdef lint
	/* suppress "used before set" message */
	x0 = y0 = 0;
#endif
	if(Blind || flags.run == 0) return;
	if(flags.run == 1 && levl[u.ux][u.uy].typ == ROOM) return;
#ifdef QUEST
	if(u.ux0 == u.ux+u.dx && u.uy0 == u.uy+u.dy) goto stop;
#endif
	for(x = u.ux-1; x <= u.ux+1; x++) for(y = u.uy-1; y <= u.uy+1; y++){
		if(x == u.ux && y == u.uy) continue;
		if(!levl[x][y].typ) continue;
		if((mtmp = m_at(x,y)) && !mtmp->mimic &&
		    (!mtmp->minvis || See_invisible)){
			if(!mtmp->mtame || (x == u.ux+u.dx && y == u.uy+u.dy))
				goto stop;
		} else mtmp = 0; /* invisible M cannot influence us */
		if(x == u.ux-u.dx && y == u.uy-u.dy) continue;
#ifdef DGK
		{
		register uchar sym = levl[x][y].scrsym;

		if (sym == symbol.vwall || sym == symbol.hwall
			|| sym == symbol.room || sym == ' ' || IS_CORNER(sym))
			continue;
		else if (sym == symbol.door) {
			if(x != u.ux && y != u.uy) continue;
			if(flags.run != 1) goto stop;
			goto corr;
		} else if (sym == symbol.corr) {
		corr:
			if(flags.run == 1 || flags.run == 3) {
				i = DIST(x,y,u.ux+u.dx,u.uy+u.dy);
				if(i > 2) continue;
				if(corrct == 1 && DIST(x,y,x0,y0) != 1)
					noturn = 1;
				if(i < i0) {
					i0 = i;
					x0 = x;
					y0 = y;
					m0 = mtmp ? 1 : 0;
				}
			}
			corrct++;
			continue;
		} else if (sym == '^') {
			if(flags.run == 1) goto corr;	/* if you must */
			if(x == u.ux+u.dx && y == u.uy+u.dy) goto stop;
			continue;
		} else {		/* e.g. objects or trap or stairs */
			if(flags.run == 1) goto corr;
			if(mtmp) continue;		/* d */
		}
		stop:
			nomul(0);
			return;
		}
#else
		switch(levl[x][y].scrsym){
		case '|':
		case '-':
		case '.':
		case ' ':
			break;
		case '+':
			if(x != u.ux && y != u.uy) break;
			if(flags.run != 1) goto stop;
			/* fall into next case */
		case CORR_SYM:
		corr:
			if(flags.run == 1 || flags.run == 3) {
				i = DIST(x,y,u.ux+u.dx,u.uy+u.dy);
				if(i > 2) break;
				if(corrct == 1 && DIST(x,y,x0,y0) != 1)
					noturn = 1;
				if(i < i0) {
					i0 = i;
					x0 = x;
					y0 = y;
					m0 = mtmp ? 1 : 0;
				}
			}
			corrct++;
			break;
		case '^':
			if(flags.run == 1) goto corr;	/* if you must */
			if(x == u.ux+u.dx && y == u.uy+u.dy) goto stop;
			break;
		default:	/* e.g. objects or trap or stairs */
			if(flags.run == 1) goto corr;
			if(mtmp) break;		/* d */
		stop:
			nomul(0);
			return;
		}
#endif
	}
#ifdef QUEST
	if(corrct > 0 && (flags.run == 4 || flags.run == 5)) goto stop;
#endif
	if(corrct > 1 && flags.run == 2) goto stop;
	if((flags.run == 1 || flags.run == 3) && !noturn && !m0 && i0 &&
		(corrct == 1 || (corrct == 2 && i0 == 1))) {
		/* make sure that we do not turn too far */
		if(i0 == 2) {
		    if(u.dx == y0-u.uy && u.dy == u.ux-x0)
			i = 2;		/* straight turn right */
		    else
			i = -2;		/* straight turn left */
		} else if(u.dx && u.dy) {
		    if((u.dx == u.dy && y0 == u.uy) ||
			(u.dx != u.dy && y0 != u.uy))
			i = -1;		/* half turn left */
		    else
			i = 1;		/* half turn right */
		} else {
		    if((x0-u.ux == y0-u.uy && !u.dy) ||
			(x0-u.ux != y0-u.uy && u.dy))
			i = 1;		/* half turn right */
		    else
			i = -1;		/* half turn left */
		}
		i += u.last_str_turn;
		if(i <= 2 && i >= -2) {
			u.last_str_turn = i;
			u.dx = x0-u.ux, u.dy = y0-u.uy;
		}
	}
}

/* something like lookaround, but we are not running */
/* react only to monsters that might hit us */
monster_nearby() {
register int x,y;
register struct monst *mtmp;
	if(!Blind)
	for(x = u.ux-1; x <= u.ux+1; x++) for(y = u.uy-1; y <= u.uy+1; y++){
		if(x == u.ux && y == u.uy) continue;
		if((mtmp = m_at(x,y)) && !mtmp->mimic && !mtmp->mtame &&
			!mtmp->mpeaceful && !index("Ea", mtmp->data->mlet) &&
			!mtmp->mfroz && !mtmp->msleep &&  /* aplvax!jcn */
			(!mtmp->minvis || See_invisible))
			return(1);
	}
	return(0);
}

#ifdef QUEST
cansee(x,y) xchar x,y; {
register int dx,dy,adx,ady,sdx,sdy,dmax,d;
	if(Blind) return(0);
	if(!isok(x,y)) return(0);
	d = dist(x,y);
	if(d < 3) return(1);
	if(d > u.uhorizon*u.uhorizon) return(0);
	if(!levl[x][y].lit)
		return(0);
	dx = x - u.ux;	adx = abs(dx);	sdx = sgn(dx);
	dy = y - u.uy;  ady = abs(dy);	sdy = sgn(dy);
	if(dx == 0 || dy == 0 || adx == ady){
		dmax = (dx == 0) ? ady : adx;
		for(d = 1; d <= dmax; d++)
			if(!rroom(sdx*d,sdy*d))
				return(0);
		return(1);
	} else if(ady > adx){
		for(d = 1; d <= ady; d++){
			if(!rroom(sdx*( (d*adx)/ady ), sdy*d) ||
			   !rroom(sdx*( (d*adx-1)/ady+1 ), sdy*d))
				return(0);
		}
		return(1);
	} else {
		for(d = 1; d <= adx; d++){
			if(!rroom(sdx*d, sdy*( (d*ady)/adx )) ||
			   !rroom(sdx*d, sdy*( (d*ady-1)/adx+1 )))
				return(0);
		}
		return(1);
	}
}

rroom(x,y) register int x,y; {
	return(IS_ROOM(levl[u.ux+x][u.uy+y].typ));
}

#else

cansee(x,y) xchar x,y; {
	if(Blind || u.uswallow) return(0);
	if(dist(x,y) < 3) return(1);
	if(levl[x][y].lit && seelx <= x && x <= seehx && seely <= y &&
		y <= seehy) return(1);
	return(0);
}
#endif /* QUEST /**/

sgn(a) register int a; {
	return((a > 0) ? 1 : (a == 0) ? 0 : -1);
}

#ifdef QUEST
setsee()
{
	register x,y;

	if(Blind) {
		pru();
		return;
	}
	for(y = u.uy-u.uhorizon; y <= u.uy+u.uhorizon; y++)
		for(x = u.ux-u.uhorizon; x <= u.ux+u.uhorizon; x++) {
			if(cansee(x,y))
				prl(x,y);
	}
}

#else

setsee()
{
	register x,y;

	if(Blind) {
		pru();
		return;
	}
	if(!levl[u.ux][u.uy].lit) {
		seelx = u.ux-1;
		seehx = u.ux+1;
		seely = u.uy-1;
		seehy = u.uy+1;
	} else {
		for(seelx = u.ux; levl[seelx-1][u.uy].lit; seelx--);
		for(seehx = u.ux; levl[seehx+1][u.uy].lit; seehx++);
		for(seely = u.uy; levl[u.ux][seely-1].lit; seely--);
		for(seehy = u.uy; levl[u.ux][seehy+1].lit; seehy++);
	}
	for(y = seely; y <= seehy; y++)
		for(x = seelx; x <= seehx; x++) {
			prl(x,y);
	}
	if(!levl[u.ux][u.uy].lit) seehx = 0; /* seems necessary elsewhere */
	else {
	    if(seely == u.uy) for(x = u.ux-1; x <= u.ux+1; x++) prl(x,seely-1);
	    if(seehy == u.uy) for(x = u.ux-1; x <= u.ux+1; x++) prl(x,seehy+1);
	    if(seelx == u.ux) for(y = u.uy-1; y <= u.uy+1; y++) prl(seelx-1,y);
	    if(seehx == u.ux) for(y = u.uy-1; y <= u.uy+1; y++) prl(seehx+1,y);
	}
}
#endif /* QUEST /**/

nomul(nval)
register nval;
{
#ifdef DGKMOD
	if(multi < nval) return;	/* This is a bug fix by ab@unido */
#else
	if(multi < 0) return;
#endif
	multi = nval;
	flags.mv = flags.run = 0;
}

abon()
{
#ifdef KAA
	if (u.usym != '@') return(mons[u.umonnum].mlevel-3);
#endif
	if(u.ustr == 3) return(-3);
	else if(u.ustr < 6) return(-2);
	else if(u.ustr < 8) return(-1);
	else if(u.ustr < 17) return(0);
	else if(u.ustr < 69) return(1);	/* up to 18/50 */
	else if(u.ustr < 118) return(2);
	else return(3);
}

dbon()
{
	if (u.usym != '@') return(0);

	if(u.ustr < 6) return(-1);
	else if(u.ustr < 16) return(0);
	else if(u.ustr < 18) return(1);
	else if(u.ustr == 18) return(2);	/* up to 18 */
	else if(u.ustr < 94) return(3);		/* up to 18/75 */
	else if(u.ustr < 109) return(4);	/* up to 18/90 */
	else if(u.ustr < 118) return(5);	/* up to 18/99 */
	else return(6);
}

losestr(num)	/* may kill you; cause may be poison or monster like 'A' */
register num;
{
	u.ustr -= num;
	while(u.ustr < 3) {
		u.ustr++;
		u.uhp -= 6;
		u.uhpmax -= 6;
	}
	flags.botl = 1;
}

losehp(n,knam)
register n;
register char *knam;
{
#ifdef KAA
	if (u.mtimedone) {
		u.mh -= n;
		if (u.mhmax < u.mh) u.mhmax = u.mh;
		flags.botl = 1;
		if (u.mh < 1) rehumanize();
		return(0);
	}
#endif
	u.uhp -= n;
	if(u.uhp > u.uhpmax)
		u.uhpmax = u.uhp;	/* perhaps n was negative */
	flags.botl = 1;
	if(u.uhp < 1) {
		killer = knam;	/* the thing that killed you */
		pline("you died");
		done("died");
	}
}

losehp_m(n,mtmp)
register n;
register struct monst *mtmp;
{
#ifdef KAA
	if (u.mtimedone) {
		u.mh -= n;
		flags.botl = 1;
		if (u.mh < 1) rehumanize();
		return;
	}
#endif
	u.uhp -= n;
	flags.botl = 1;
	if(u.uhp < 1)
		done_in_by(mtmp);
}

losexp()	/* hit by V or W */
{
	register num;
	extern long newuexp();

	if (u.usym == 'V' || u.usym=='W') return;

	if(u.ulevel > 1)
		pline("Goodbye level %u.", u.ulevel--);
	else
		u.uhp = -1;
	num = rnd(10);
	u.uhp -= num;
	u.uhpmax -= num;
#ifdef SPELLS
	num = rnd(u.ulevel/2+1) + 1;		/* M. Stephenson */
	u.uen -= num;
	if (u.uen < 0)		u.uen = 0;
	u.uenmax -= num;
	if (u.uenmax < 0)	u.uenmax = 0;
#endif
	u.uexp = newuexp();
	flags.botl = 1;
}

inv_weight(){
register struct obj *otmp = invent;
register int wt = (u.ugold + 500)/1000;
register int carrcap;
#ifdef KAA
	if (u.mtimedone) {
		if (u.usym == '9') carrcap = MAX_CARR_CAP * 4;
		else if (u.usym == 'N') carrcap = MAX_CARR_CAP;
		else if (mons[u.umonnum].mlevel <= 3)
			carrcap = 5*mons[u.umonnum].mlevel + 30;
		else carrcap = 5*mons[u.umonnum].mlevel + 100;
	}
#endif
	if(Levitation)			/* pugh@cornell */
		carrcap = MAX_CARR_CAP;
	else {
		carrcap = 5*(((u.ustr > 18) ? 20 : u.ustr) + u.ulevel);
		if(carrcap > MAX_CARR_CAP) carrcap = MAX_CARR_CAP;
		if(Wounded_legs & LEFT_SIDE) carrcap -= 10;
		if(Wounded_legs & RIGHT_SIDE) carrcap -= 10;
	}
	while(otmp){
		wt += otmp->owt;
		otmp = otmp->nobj;
	}
	return(wt - carrcap);
}

inv_cnt(){
register struct obj *otmp = invent;
register int ct = 0;
	while(otmp){
		ct++;
		otmp = otmp->nobj;
	}
	return(ct);
}

long
newuexp()
{
	return(10*(1L << (u.ulevel-1)));
}
