trek/capture.c

   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 }