trek/capture.c

   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 }