xref: /dragonfly/games/sail/dr_4.c (revision 984263bc)
1 /*
2  * Copyright (c) 1983, 1993
3  *	The Regents of the University of California.  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
35 #if 0
36 static char sccsid[] = "@(#)dr_4.c	8.1 (Berkeley) 5/31/93";
37 #endif
38 static const char rcsid[] =
39  "$FreeBSD: src/games/sail/dr_4.c,v 1.5 1999/11/30 03:49:32 billf Exp $";
40 #endif /* not lint */
41 
42 #include "externs.h"
43 
44 ungrap(from, to)
45 struct ship *from, *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 || die() < 3) {
55 			cleangrapple(from, to, 0);
56 			makesignal(from, "ungrappling %s (%c%c)", to);
57 		}
58 	}
59 }
60 
61 grap(from, to)
62 struct ship *from, *to;
63 {
64 	if (capship(from)->nationality != capship(to)->nationality && die() > 2)
65 		return;
66 	Write(W_GRAP, from, 0, to->file->index, 0, 0, 0);
67 	Write(W_GRAP, to, 0, from->file->index, 0, 0, 0);
68 	makesignal(from, "grappled with %s (%c%c)", to);
69 }
70