1/*	$NetBSD: game.c,v 1.12 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[] = "@(#)game.c	8.2 (Berkeley) 4/28/95";
36#else
37__RCSID("$NetBSD: game.c,v 1.12 2009/03/14 19:35:13 dholland Exp $");
38#endif
39#endif /* not lint */
40
41#include <sys/types.h>
42#include <stdbool.h>
43#include "extern.h"
44
45int
46maxturns(struct ship *ship, bool *af)
47{
48	int turns;
49
50	turns = ship->specs->ta;
51	*af = (ship->file->drift > 1 && turns);
52	if (*af != false) {
53		turns--;
54		if (ship->file->FS == 1)
55			turns = 0;
56	}
57	return turns;
58}
59
60int
61maxmove(struct ship *ship, int dir, int fs)
62{
63	int riggone = 0, Move, flank = 0;
64
65	Move = ship->specs->bs;
66	if (!ship->specs->rig1)
67		riggone++;
68	if (!ship->specs->rig2)
69		riggone++;
70	if (!ship->specs->rig3)
71		riggone++;
72	if (!ship->specs->rig4)
73		riggone++;
74	if ((ship->file->FS || fs) && fs != -1) {
75		flank = 1;
76		Move = ship->specs->fs;
77	}
78	if (dir == winddir)
79		Move -= 1 + WET[windspeed][ship->specs->class-1].B;
80	else if (dir == winddir + 2 || dir == winddir - 2 ||
81		 dir == winddir - 6 || dir == winddir + 6)
82		Move -= 1 + WET[windspeed][ship->specs->class-1].C;
83	else if (dir == winddir + 3 || dir == winddir - 3 ||
84		 dir == winddir - 5 || dir == winddir + 5)
85		Move = (flank ? 2 : 1) - WET[windspeed][ship->specs->class-1].D;
86	else if (dir == winddir + 4 || dir == winddir - 4)
87		Move = 0;
88	else
89		Move -= WET[windspeed][ship->specs->class-1].A;
90	Move -= riggone;
91	Move = Move < 0 ? 0 : Move;
92	return(Move);
93}
94