1/*	$OpenBSD: dr_4.c,v 1.5 2016/01/08 20:26:33 mestre Exp $	*/
2/*	$NetBSD: dr_4.c,v 1.3 1995/04/22 10:36:50 cgd Exp $	*/
3
4/*
5 * Copyright (c) 1983, 1993
6 *	The Regents of the University of California.  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
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <stdlib.h>
34
35#include "extern.h"
36
37void
38ungrap(struct ship *from, struct ship *to)
39{
40	int k;
41	char friend;
42
43	if ((k = grappled2(from, to)) == 0)
44		return;
45	friend = capship(from)->nationality == capship(to)->nationality;
46	while (--k >= 0) {
47		if (friend || die() < 3) {
48			cleangrapple(from, to, 0);
49			makesignal(from, "ungrappling $$", to);
50		}
51	}
52}
53
54void
55grap(struct ship *from, struct ship *to)
56{
57	if (capship(from)->nationality != capship(to)->nationality && die() > 2)
58		return;
59	Write(W_GRAP, from, to->file->index, 0, 0, 0);
60	Write(W_GRAP, to, from->file->index, 0, 0, 0);
61	makesignal(from, "grappled with $$", to);
62}
63