games/trek/shield.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  * @(#)shield.c 8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/trek/shield.c,v 1.5 1999/11/30 03:49:54 billf Exp $
  31  * $DragonFly: src/games/trek/shield.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
  32  */
  33
  34 #include "trek.h"
  35 #include "getpar.h"
  36
  37 /*
  38 **  SHIELD AND CLOAKING DEVICE CONTROL
  39 **
  40 **      'f' is one for auto shield up (in case of Condition RED),
  41 **      zero for shield control, and negative one for cloaking
  42 **      device control.
  43 **
  44 **      Called with an 'up' or 'down' on the same line, it puts
  45 **      the shields/cloak into the specified mode.  Otherwise it
  46 **      reports to the user the current mode, and asks if she wishes
  47 **      to change.
  48 **
  49 **      This is not a free move.  Hits that occur as a result of
  50 **      this move appear as though the shields are half up/down,
  51 **      so you get partial hits.
  52 */
  53
  54 struct cvntab Udtab[] = {
  55         { "u",          "p",            (cmdfun)1,      0 },
  56         { "d",          "own",          (cmdfun)0,      0 },
  57         { NULL,         NULL,           NULL,           0 }
  58 };
  59
  60 void
  61 shield(int f)
  62 {
  63         int             i;
  64         struct cvntab   *r;
  65         char            s[100];
  66         const char      *device, *dev2, *dev3;
  67         int             ind;
  68         char            *stat;
  69
  70         if (f > 0 && (Ship.shldup || damaged(SRSCAN)))
  71                 return;
  72         if (f < 0) {
  73                 /* cloaking device */
  74                 if (Ship.ship == QUEENE) {
  75                         printf("Ye Faire Queene does not have the cloaking device.\n");
  76                         return;
  77                 }
  78                 device = "Cloaking device";
  79                 dev2 = "is";
  80                 ind = CLOAK;
  81                 dev3 = "it";
  82                 stat = &Ship.cloaked;
  83         } else {
  84                 /* shields */
  85                 device = "Shields";
  86                 dev2 = "are";
  87                 dev3 = "them";
  88                 ind = SHIELD;
  89                 stat = &Ship.shldup;
  90         }
  91         if (damaged(ind)) {
  92                 if (f <= 0)
  93                         out(ind);
  94                 return;
  95         }
  96         if (Ship.cond == DOCKED) {
  97                 printf("%s %s down while docked\n", device, dev2);
  98                 return;
  99         }
 100         if (f <= 0 && !testnl()) {
 101                 r = getcodpar("Up or down", Udtab);
 102                 i = (long) r->value;
 103         } else {
 104                 if (*stat)
 105                         sprintf(s, "%s %s up.  Do you want %s down", device, dev2, dev3);
 106                 else
 107                         sprintf(s, "%s %s down.  Do you want %s up", device, dev2, dev3);
 108                 if (!getynpar(s))
 109                         return;
 110                 i = !*stat;
 111         }
 112         if (*stat == i) {
 113                 printf("%s already ", device);
 114                 if (i)
 115                         printf("up\n");
 116                 else
 117                         printf("down\n");
 118                 return;
 119         }
 120         if (i) {
 121                 if (f >= 0)
 122                         Ship.energy -= Param.shupengy;
 123                 else
 124                         Ship.cloakgood = 0;
 125         }
 126         Move.free = 0;
 127         if (f >= 0)
 128                 Move.shldchg = 1;
 129         *stat = i;
 130         return;
 131 }