1/*	$NetBSD: capture.c,v 1.11 2009/05/24 22:55:03 dholland Exp $	*/
2
3/*
4 * Copyright (c) 1980, 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[] = "@(#)capture.c	8.1 (Berkeley) 5/31/93";
36#else
37__RCSID("$NetBSD: capture.c,v 1.11 2009/05/24 22:55:03 dholland Exp $");
38#endif
39#endif /* not lint */
40
41#include <stdio.h>
42#include "trek.h"
43
44static struct kling *selectklingon(void);
45
46/*
47**  Ask a Klingon To Surrender
48**
49**	(Fat chance)
50**
51**	The Subspace Radio is needed to ask a Klingon if he will kindly
52**	surrender.  A random Klingon from the ones in the quadrant is
53**	chosen.
54**
55**	The Klingon is requested to surrender.  The probability of this
56**	is a function of that Klingon's remaining power, our power,
57**	etc.
58*/
59
60/*ARGSUSED*/
61void
62capture(int v __unused)
63{
64	int		i;
65	struct kling	*k;
66	double			x;
67
68	/* check for not cloaked */
69	if (Ship.cloaked) {
70		printf("Ship-ship communications out when cloaked\n");
71		return;
72	}
73	if (damaged(SSRADIO)) {
74		out(SSRADIO);
75		return;
76	}
77	/* find out if there are any at all */
78	if (Etc.nkling <= 0) {
79		printf("Uhura: Getting no response, sir\n");
80		return;
81	}
82
83	/* if there is more than one Klingon, find out which one */
84	k = selectklingon();
85	Move.free = 0;
86	Move.time = 0.05;
87
88	/* check out that Klingon */
89	k->srndreq++;
90	x = Param.klingpwr;
91	x *= Ship.energy;
92	x /= k->power * Etc.nkling;
93	x *= Param.srndrprob;
94	i = x;
95#ifdef xTRACE
96	if (Trace)
97		printf("Prob = %d (%.4f)\n", i, x);
98#endif
99	if (i > ranf(100)) {
100		/* guess what, he surrendered!!! */
101		printf("Klingon at %d,%d surrenders\n", k->x, k->y);
102		i = ranf(Param.klingcrew);
103		if ( i > 0 )
104			printf("%d klingons commit suicide rather than be "
105			       "taken captive\n", Param.klingcrew - i);
106		if (i > Ship.brigfree)
107			i = Ship.brigfree;
108		Ship.brigfree -= i;
109		printf("%d captives taken\n", i);
110		killk(k->x, k->y);
111		return;
112	}
113
114	/* big surprise, he refuses to surrender */
115	printf("Fat chance, captain\n");
116	return;
117}
118
119
120/*
121**  SELECT A KLINGON
122**
123**	Cruddy, just takes one at random.  Should ask the captain.
124*/
125
126static struct kling *
127selectklingon(void)
128{
129	int		i;
130
131	if (Etc.nkling < 2)
132		i = 0;
133	else
134		i = ranf(Etc.nkling);
135	return (&Etc.klingon[i]);
136}
137