1/*	$NetBSD: dr_4.c,v 1.14 2009/03/14 19:35:13 dholland Exp $	*/
2
3/*
4 * Copyright (c) 1983, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34#if 0
35static char sccsid[] = "@(#)dr_4.c	8.2 (Berkeley) 4/28/95";
36#else
37__RCSID("$NetBSD: dr_4.c,v 1.14 2009/03/14 19:35:13 dholland Exp $");
38#endif
39#endif /* not lint */
40
41#include <stdlib.h>
42#include "extern.h"
43
44void
45ungrap(struct ship *from, struct ship *to)
46{
47	int k;
48	char friend;
49
50	if ((k = grappled2(from, to)) == 0)
51		return;
52	friend = capship(from)->nationality == capship(to)->nationality;
53	while (--k >= 0) {
54		if (friend || dieroll() < 3) {
55			cleangrapple(from, to, 0);
56			makesignal(from, "ungrappling $$", to);
57		}
58	}
59}
60
61void
62grap(struct ship *from, struct ship *to)
63{
64	if (capship(from)->nationality != capship(to)->nationality &&
65	    dieroll() > 2)
66		return;
67	send_grap(from, to->file->index);
68	send_grap(to, from->file->index);
69	makesignal(from, "grappled with $$", to);
70}
71