games/trek/capture.c

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)capture.c        8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/trek/capture.c,v 1.4 1999/11/30 03:49:43 billf Exp $
  35  * $DragonFly: src/games/trek/capture.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
  36  */
  37
  38 # include       "trek.h"
  39
  40 static struct kling     *selectklingon(void);
  41
  42 /*
  43 **  Ask a Klingon To Surrender
  44 **
  45 **      (Fat chance)
  46 **
  47 **      The Subspace Radio is needed to ask a Klingon if he will kindly
  48 **      surrender.  A random Klingon from the ones in the quadrant is
  49 **      chosen.
  50 **
  51 **      The Klingon is requested to surrender.  The probability of this
  52 **      is a function of that Klingon's remaining power, our power,
  53 **      etc.
  54 */
  55
  56 void
  57 capture(__unused int unused)
  58 {
  59         int             i;
  60         struct kling    *k;
  61         double                  x;
  62
  63         /* check for not cloaked */
  64         if (Ship.cloaked)
  65         {
  66                 printf("Ship-ship communications out when cloaked\n");
  67                 return;
  68         }
  69         if (damaged(SSRADIO))
  70                 return (out(SSRADIO));
  71         /* find out if there are any at all */
  72         if (Etc.nkling <= 0)
  73         {
  74                 printf("Uhura: Getting no response, sir\n");
  75                 return;
  76         }
  77
  78         /* if there is more than one Klingon, find out which one */
  79         k = selectklingon();
  80         Move.free = 0;
  81         Move.time = 0.05;
  82
  83         /* check out that Klingon */
  84         k->srndreq++;
  85         x = Param.klingpwr;
  86         x *= Ship.energy;
  87         x /= k->power * Etc.nkling;
  88         x *= Param.srndrprob;
  89         i = x;
  90 #       ifdef xTRACE
  91         if (Trace)
  92                 printf("Prob = %d (%.4f)\n", i, x);
  93 #       endif
  94         if (i > ranf(100))
  95         {
  96                 /* guess what, he surrendered!!! */
  97                 printf("Klingon at %d,%d surrenders\n", k->x, k->y);
  98                 i = ranf(Param.klingcrew);
  99                 if ( i > 0 )
 100                         printf("%d klingons commit suicide rather than be taken captive\n", Param.klingcrew - i);
 101                 if (i > Ship.brigfree)
 102                         i = Ship.brigfree;
 103                 Ship.brigfree -= i;
 104                 printf("%d captives taken\n", i);
 105                 killk(k->x, k->y);
 106                 return;
 107         }
 108
 109         /* big surprise, he refuses to surrender */
 110         printf("Fat chance, captain\n");
 111         return;
 112 }
 113
 114
 115 /*
 116 **  SELECT A KLINGON
 117 **
 118 **      Cruddy, just takes one at random.  Should ask the captain.
 119 */
 120
 121 static struct kling *
 122 selectklingon(void)
 123 {
 124         int             i;
 125
 126         if (Etc.nkling < 2)
 127                 i = 0;
 128         else
 129                 i = ranf(Etc.nkling);
 130         return (&Etc.klingon[i]);
 131 }