trek/shield.c

   1 /*      $NetBSD: shield.c,v 1.9 2009/05/24 19:18:44 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[] = "@(#)shield.c    8.1 (Berkeley) 5/31/93";
  36 #else
  37 __RCSID("$NetBSD: shield.c,v 1.9 2009/05/24 19:18:44 dholland Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include <stdio.h>
  42 #include "trek.h"
  43 #include "getpar.h"
  44
  45 /*
  46 **  SHIELD AND CLOAKING DEVICE CONTROL
  47 **
  48 **      'f' is one for auto shield up (in case of Condition RED),
  49 **      zero for shield control, and negative one for cloaking
  50 **      device control.
  51 **
  52 **      Called with an 'up' or 'down' on the same line, it puts
  53 **      the shields/cloak into the specified mode.  Otherwise it
  54 **      reports to the user the current mode, and asks if she wishes
  55 **      to change.
  56 **
  57 **      This is not a free move.  Hits that occur as a result of
  58 **      this move appear as though the shields are half up/down,
  59 **      so you get partial hits.
  60 */
  61
  62 const struct cvntab Udtab[] =
  63 {
  64         { "u",          "p",            (cmdfun)1,      0 },
  65         { "d",          "own",          (cmdfun)0,      0 },
  66         { NULL,         NULL,           NULL,           0 }
  67 };
  68
  69 void
  70 shield(int f)
  71 {
  72         int             i;
  73         const struct cvntab     *r;
  74         char            s[100];
  75         const char      *device, *dev2, *dev3;
  76         int             ind;
  77         char            *stat;
  78
  79         if (f > 0 && (Ship.shldup || damaged(SRSCAN)))
  80                 return;
  81         if (f < 0)
  82         {
  83                 /* cloaking device */
  84                 if (Ship.ship == QUEENE) {
  85                         printf("Ye Faire Queene does not have the cloaking device.\n");
  86                         return;
  87                 }
  88                 device = "Cloaking device";
  89                 dev2 = "is";
  90                 ind = CLOAK;
  91                 dev3 = "it";
  92                 stat = &Ship.cloaked;
  93         }
  94         else
  95         {
  96                 /* shields */
  97                 device = "Shields";
  98                 dev2 = "are";
  99                 dev3 = "them";
 100                 ind = SHIELD;
 101                 stat = &Ship.shldup;
 102         }
 103         if (damaged(ind))
 104         {
 105                 if (f <= 0)
 106                         out(ind);
 107                 return;
 108         }
 109         if (Ship.cond == DOCKED)
 110         {
 111                 printf("%s %s down while docked\n", device, dev2);
 112                 return;
 113         }
 114         if (f <= 0 && !testnl())
 115         {
 116                 r = getcodpar("Up or down", Udtab);
 117                 i = (long) r->value;
 118         }
 119         else
 120         {
 121                 if (*stat)
 122                         (void)sprintf(s, "%s %s up.  Do you want %s down", device, dev2, dev3);
 123                 else
 124                         (void)sprintf(s, "%s %s down.  Do you want %s up", device, dev2, dev3);
 125                 if (!getynpar(s))
 126                         return;
 127                 i = !*stat;
 128         }
 129         if (*stat == i)
 130         {
 131                 printf("%s already ", device);
 132                 if (i)
 133                         printf("up\n");
 134                 else
 135                         printf("down\n");
 136                 return;
 137         }
 138         if (i) {
 139                 if (f >= 0)
 140                         Ship.energy -= Param.shupengy;
 141                 else
 142                         Ship.cloakgood = 0;
 143         }
 144         Move.free = 0;
 145         if (f >= 0)
 146                 Move.shldchg = 1;
 147         *stat = i;
 148         return;
 149 }