trek/capture.c

   1 /*
   2  * Copyright (c) 1980 Regents of the University of California.
   3  * 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
  34 #ifndef lint
  35 /*static char sccsid[] = "from: @(#)capture.c   5.4 (Berkeley) 6/1/90";*/
  36 static char rcsid[] = "$Id: capture.c,v 1.2 1993/08/01 18:50:51 mycroft Exp $";
  37 #endif /* not lint */
  38
  39 # include       "trek.h"
  40
  41 /*
  42 **  Ask a Klingon To Surrender
  43 **
  44 **      (Fat chance)
  45 **
  46 **      The Subspace Radio is needed to ask a Klingon if he will kindly
  47 **      surrender.  A random Klingon from the ones in the quadrant is
  48 **      chosen.
  49 **
  50 **      The Klingon is requested to surrender.  The probability of this
  51 **      is a function of that Klingon's remaining power, our power,
  52 **      etc.
  53 */
  54
  55 capture()
  56 {
  57         register int            i;
  58         register struct kling   *k;
  59         double                  x;
  60         extern struct kling     *selectklingon();
  61
  62         /* check for not cloaked */
  63         if (Ship.cloaked)
  64         {
  65                 printf("Ship-ship communications out when cloaked\n");
  66                 return;
  67         }
  68         if (damaged(SSRADIO))
  69                 return (out(SSRADIO));
  70         /* find out if there are any at all */
  71         if (Etc.nkling <= 0)
  72         {
  73                 printf("Uhura: Getting no response, sir\n");
  74                 return;
  75         }
  76
  77         /* if there is more than one Klingon, find out which one */
  78         k = selectklingon();
  79         Move.free = 0;
  80         Move.time = 0.05;
  81
  82         /* check out that Klingon */
  83         k->srndreq++;
  84         x = Param.klingpwr;
  85         x *= Ship.energy;
  86         x /= k->power * Etc.nkling;
  87         x *= Param.srndrprob;
  88         i = x;
  89 #       ifdef xTRACE
  90         if (Trace)
  91                 printf("Prob = %d (%.4f)\n", i, x);
  92 #       endif
  93         if (i > ranf(100))
  94         {
  95                 /* guess what, he surrendered!!! */
  96                 printf("Klingon at %d,%d surrenders\n", k->x, k->y);
  97                 i = ranf(Param.klingcrew);
  98                 if ( i > 0 )
  99                         printf("%d klingons commit suicide rather than be taken captive\n", Param.klingcrew - i);
 100                 if (i > Ship.brigfree)
 101                         i = Ship.brigfree;
 102                 Ship.brigfree -= i;
 103                 printf("%d captives taken\n", i);
 104                 killk(k->x, k->y);
 105                 return;
 106         }
 107
 108         /* big surprise, he refuses to surrender */
 109         printf("Fat chance, captain\n");
 110         return;
 111 }
 112
 113
 114 /*
 115 **  SELECT A KLINGON
 116 **
 117 **      Cruddy, just takes one at random.  Should ask the captain.
 118 */
 119
 120 struct kling    *selectklingon()
 121 {
 122         register int            i;
 123
 124         if (Etc.nkling < 2)
 125                 i = 0;
 126         else
 127                 i = ranf(Etc.nkling);
 128         return (&Etc.klingon[i]);
 129 }