1/*	$OpenBSD: hack.worn.c,v 1.5 2009/10/27 23:59:25 deraadt Exp $	*/
2
3/*
4 * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
5 * Amsterdam
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * - Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * - Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * - Neither the name of the Stichting Centrum voor Wiskunde en
20 * Informatica, nor the names of its contributors may be used to endorse or
21 * promote products derived from this software without specific prior
22 * written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
25 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
27 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
28 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
29 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
31 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
32 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
33 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
34 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36
37/*
38 * Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
39 * All rights reserved.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 *    notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 *    notice, this list of conditions and the following disclaimer in the
48 *    documentation and/or other materials provided with the distribution.
49 * 3. The name of the author may not be used to endorse or promote products
50 *    derived from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
53 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
54 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
55 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
56 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
57 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
58 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
59 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
60 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
61 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 */
63
64#include "hack.h"
65
66struct worn {
67	long w_mask;
68	struct obj **w_obj;
69} worn[] = {
70	{ W_ARM, &uarm },
71	{ W_ARM2, &uarm2 },
72	{ W_ARMH, &uarmh },
73	{ W_ARMS, &uarms },
74	{ W_ARMG, &uarmg },
75	{ W_RINGL, &uleft },
76	{ W_RINGR, &uright },
77	{ W_WEP, &uwep },
78	{ W_BALL, &uball },
79	{ W_CHAIN, &uchain },
80	{ 0, 0 }
81};
82
83void
84setworn(struct obj *obj, long mask)
85{
86	struct worn *wp;
87	struct obj *oobj;
88
89	for(wp = worn; wp->w_mask; wp++) if(wp->w_mask & mask) {
90		oobj = *(wp->w_obj);
91		if(oobj && !(oobj->owornmask & wp->w_mask))
92			impossible("Setworn: mask = %ld.", wp->w_mask);
93		if(oobj) oobj->owornmask &= ~wp->w_mask;
94		if(obj && oobj && wp->w_mask == W_ARM){
95			if(uarm2) {
96				impossible("Setworn: uarm2 set?");
97			} else
98				setworn(uarm, W_ARM2);
99		}
100		*(wp->w_obj) = obj;
101		if(obj) obj->owornmask |= wp->w_mask;
102	}
103	if(uarm2 && !uarm) {
104		uarm = uarm2;
105		uarm2 = 0;
106		uarm->owornmask ^= (W_ARM | W_ARM2);
107	}
108}
109
110/* called e.g. when obj is destroyed */
111void
112setnotworn(struct obj *obj)
113{
114	struct worn *wp;
115
116	for(wp = worn; wp->w_mask; wp++)
117		if(obj == *(wp->w_obj)) {
118			*(wp->w_obj) = 0;
119			obj->owornmask &= ~wp->w_mask;
120		}
121	if(uarm2 && !uarm) {
122		uarm = uarm2;
123		uarm2 = 0;
124		uarm->owornmask ^= (W_ARM | W_ARM2);
125	}
126}
127