/*	$NetBSD: hack.worn.c,v 1.4 1997/10/19 16:59:32 christos Exp $	*/

/*
 * Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985.
 */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: hack.worn.c,v 1.4 1997/10/19 16:59:32 christos Exp $");
#endif				/* not lint */

#include "hack.h"
#include "extern.h"

struct worn {
	long            w_mask;
	struct obj    **w_obj;
}               worn[] = {
	{
		W_ARM, &uarm
	},
	{
		W_ARM2, &uarm2
	},
	{
		W_ARMH, &uarmh
	},
	{
		W_ARMS, &uarms
	},
	{
		W_ARMG, &uarmg
	},
	{
		W_RINGL, &uleft
	},
	{
		W_RINGR, &uright
	},
	{
		W_WEP, &uwep
	},
	{
		W_BALL, &uball
	},
	{
		W_CHAIN, &uchain
	},
	{
		0, 0
	}
};

void
setworn(obj, mask)
	struct obj     *obj;
	long            mask;
{
	struct worn    *wp;
	struct obj     *oobj;

	for (wp = worn; wp->w_mask; wp++)
		if (wp->w_mask & mask) {
			oobj = *(wp->w_obj);
			if (oobj && !(oobj->owornmask & wp->w_mask))
				impossible("Setworn: mask = %ld.", wp->w_mask);
			if (oobj)
				oobj->owornmask &= ~wp->w_mask;
			if (obj && oobj && wp->w_mask == W_ARM) {
				if (uarm2) {
					impossible("Setworn: uarm2 set?");
				} else
					setworn(uarm, W_ARM2);
			}
			*(wp->w_obj) = obj;
			if (obj)
				obj->owornmask |= wp->w_mask;
		}
	if (uarm2 && !uarm) {
		uarm = uarm2;
		uarm2 = 0;
		uarm->owornmask ^= (W_ARM | W_ARM2);
	}
}

/* called e.g. when obj is destroyed */
void
setnotworn(obj)
	struct obj     *obj;
{
	struct worn    *wp;

	for (wp = worn; wp->w_mask; wp++)
		if (obj == *(wp->w_obj)) {
			*(wp->w_obj) = 0;
			obj->owornmask &= ~wp->w_mask;
		}
	if (uarm2 && !uarm) {
		uarm = uarm2;
		uarm2 = 0;
		uarm->owornmask ^= (W_ARM | W_ARM2);
	}
}