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