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      1 /*	$NetBSD: capture.c,v 1.12 2009/08/12 08:54:54 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
     35 static char sccsid[] = "@(#)capture.c	8.1 (Berkeley) 5/31/93";
     36 #else
     37 __RCSID("$NetBSD: capture.c,v 1.12 2009/08/12 08:54:54 dholland Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <stdio.h>
     42 #include "trek.h"
     43 
     44 static 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*/
     61 void
     62 capture(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 
    126 static struct kling *
    127 selectklingon(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