386BSD 0.1 development
[unix-history] / usr / othersrc / games / sail / dr_4.c
CommitLineData
65717166
WJ
1/*
2 * Copyright (c) 1983 Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char sccsid[] = "@(#)dr_4.c 5.4 (Berkeley) 6/1/90";
36#endif /* not lint */
37
38#include "externs.h"
39
40ungrap(from, to)
41register struct ship *from, *to;
42{
43 register k;
44 char friend;
45
46 if ((k = grappled2(from, to)) == 0)
47 return;
48 friend = capship(from)->nationality == capship(to)->nationality;
49 while (--k >= 0) {
50 if (friend || die() < 3) {
51 cleangrapple(from, to, 0);
52 makesignal(from, "ungrappling %s (%c%c)", to);
53 }
54 }
55}
56
57grap(from, to)
58register struct ship *from, *to;
59{
60 if (capship(from)->nationality != capship(to)->nationality && die() > 2)
61 return;
62 Write(W_GRAP, from, 0, to->file->index, 0, 0, 0);
63 Write(W_GRAP, to, 0, from->file->index, 0, 0, 0);
64 makesignal(from, "grappled with %s (%c%c)", to);
65}