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capture.c revision 1.3 
      1 /*	$NetBSD: capture.c,v 1.3 1995/04/22 10:58:32 cgd 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)capture.c	8.1 (Berkeley) 5/31/93";
     39 #else
     40 static char rcsid[] = "$NetBSD: capture.c,v 1.3 1995/04/22 10:58:32 cgd Exp $";
     41 #endif
     42 #endif /* not lint */
     43 
     44 # include	"trek.h"
     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 capture()
     61 {
     62 	register int		i;
     63 	register struct kling	*k;
     64 	double			x;
     65 	extern struct kling	*selectklingon();
     66 
     67 	/* check for not cloaked */
     68 	if (Ship.cloaked)
     69 	{
     70 		printf("Ship-ship communications out when cloaked\n");
     71 		return;
     72 	}
     73 	if (damaged(SSRADIO))
     74 		return (out(SSRADIO));
     75 	/* find out if there are any at all */
     76 	if (Etc.nkling <= 0)
     77 	{
     78 		printf("Uhura: Getting no response, sir\n");
     79 		return;
     80 	}
     81 
     82 	/* if there is more than one Klingon, find out which one */
     83 	k = selectklingon();
     84 	Move.free = 0;
     85 	Move.time = 0.05;
     86 
     87 	/* check out that Klingon */
     88 	k->srndreq++;
     89 	x = Param.klingpwr;
     90 	x *= Ship.energy;
     91 	x /= k->power * Etc.nkling;
     92 	x *= Param.srndrprob;
     93 	i = x;
     94 #	ifdef xTRACE
     95 	if (Trace)
     96 		printf("Prob = %d (%.4f)\n", i, x);
     97 #	endif
     98 	if (i > ranf(100))
     99 	{
    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 taken captive\n", Param.klingcrew - i);
    105 		if (i > Ship.brigfree)
    106 			i = Ship.brigfree;
    107 		Ship.brigfree -= i;
    108 		printf("%d captives taken\n", i);
    109 		killk(k->x, k->y);
    110 		return;
    111 	}
    112 
    113 	/* big surprise, he refuses to surrender */
    114 	printf("Fat chance, captain\n");
    115 	return;
    116 }
    117 
    118 
    119 /*
    120 **  SELECT A KLINGON
    121 **
    122 **	Cruddy, just takes one at random.  Should ask the captain.
    123 */
    124 
    125 struct kling	*selectklingon()
    126 {
    127 	register int		i;
    128 
    129 	if (Etc.nkling < 2)
    130 		i = 0;
    131 	else
    132 		i = ranf(Etc.nkling);
    133 	return (&Etc.klingon[i]);
    134 }
    135