xref: /openbsd/games/sail/parties.c (revision 73471bf0)
1 /*	$OpenBSD: parties.c,v 1.5 2016/01/08 20:26:33 mestre Exp $	*/
2 /*	$NetBSD: parties.c,v 1.3 1995/04/22 10:37:04 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 "extern.h"
34 
35 int
36 meleeing(struct ship *from, struct ship *to)
37 {
38 	struct BP *p = from->file->OBP;
39 	struct BP *q = p + NBP;
40 
41 	for (; p < q; p++)
42 		if (p->turnsent && p->toship == to)
43 			return 1;
44 	return 0;
45 }
46 
47 int
48 boarding(struct ship *from, int isdefense)
49 {
50 	struct BP *p = isdefense ? from->file->DBP : from->file->OBP;
51 	struct BP *q = p + NBP;
52 
53 	for (; p < q; p++)
54 		if (p->turnsent)
55 			return 1;
56 	return 0;
57 }
58 
59 void
60 unboard(struct ship *ship, struct ship *to, int isdefense)
61 {
62 	struct BP *p = isdefense ? ship->file->DBP : ship->file->OBP;
63 	int n;
64 
65 	for (n = 0; n < NBP; p++, n++)
66 		if (p->turnsent && (p->toship == to || isdefense || ship == to))
67 			Write(isdefense ? W_DBP : W_OBP, ship, n, 0, 0, 0);
68 }
69