trek/shield.c

   1 /*      $NetBSD: shield.c,v 1.5 1997/10/12 21:25:17 christos 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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 #if 0
  39 static char sccsid[] = "@(#)shield.c    8.1 (Berkeley) 5/31/93";
  40 #else
  41 __RCSID("$NetBSD: shield.c,v 1.5 1997/10/12 21:25:17 christos Exp $");
  42 #endif
  43 #endif /* not lint */
  44
  45 #include <stdio.h>
  46 #include "trek.h"
  47 #include "getpar.h"
  48
  49 /*
  50 **  SHIELD AND CLOAKING DEVICE CONTROL
  51 **
  52 **      'f' is one for auto shield up (in case of Condition RED),
  53 **      zero for shield control, and negative one for cloaking
  54 **      device control.
  55 **
  56 **      Called with an 'up' or 'down' on the same line, it puts
  57 **      the shields/cloak into the specified mode.  Otherwise it
  58 **      reports to the user the current mode, and asks if she wishes
  59 **      to change.
  60 **
  61 **      This is not a free move.  Hits that occur as a result of
  62 **      this move appear as though the shields are half up/down,
  63 **      so you get partial hits.
  64 */
  65
  66 struct cvntab Udtab[] =
  67 {
  68         { "u",          "p",            (cmdfun)1,      0 },
  69         { "d",          "own",          (cmdfun)0,      0 },
  70         { NULL,         NULL,           NULL,           0 }
  71 };
  72
  73 void
  74 shield(f)
  75 int     f;
  76 {
  77         int             i;
  78         struct cvntab   *r;
  79         char            s[100];
  80         char            *device, *dev2, *dev3;
  81         int             ind;
  82         char            *stat;
  83
  84         if (f > 0 && (Ship.shldup || damaged(SRSCAN)))
  85                 return;
  86         if (f < 0)
  87         {
  88                 /* cloaking device */
  89                 if (Ship.ship == QUEENE) {
  90                         printf("Ye Faire Queene does not have the cloaking device.\n");
  91                         return;
  92                 }
  93                 device = "Cloaking device";
  94                 dev2 = "is";
  95                 ind = CLOAK;
  96                 dev3 = "it";
  97                 stat = &Ship.cloaked;
  98         }
  99         else
 100         {
 101                 /* shields */
 102                 device = "Shields";
 103                 dev2 = "are";
 104                 dev3 = "them";
 105                 ind = SHIELD;
 106                 stat = &Ship.shldup;
 107         }
 108         if (damaged(ind))
 109         {
 110                 if (f <= 0)
 111                         out(ind);
 112                 return;
 113         }
 114         if (Ship.cond == DOCKED)
 115         {
 116                 printf("%s %s down while docked\n", device, dev2);
 117                 return;
 118         }
 119         if (f <= 0 && !testnl())
 120         {
 121                 r = getcodpar("Up or down", Udtab);
 122                 i = (long) r->value;
 123         }
 124         else
 125         {
 126                 if (*stat)
 127                         (void)sprintf(s, "%s %s up.  Do you want %s down", device, dev2, dev3);
 128                 else
 129                         (void)sprintf(s, "%s %s down.  Do you want %s up", device, dev2, dev3);
 130                 if (!getynpar(s))
 131                         return;
 132                 i = !*stat;
 133         }
 134         if (*stat == i)
 135         {
 136                 printf("%s already ", device);
 137                 if (i)
 138                         printf("up\n");
 139                 else
 140                         printf("down\n");
 141                 return;
 142         }
 143         if (i)
 144                 if (f >= 0)
 145                         Ship.energy -= Param.shupengy;
 146                 else
 147                         Ship.cloakgood = 0;
 148         Move.free = 0;
 149         if (f >= 0)
 150                 Move.shldchg = 1;
 151         *stat = i;
 152         return;
 153 }