games/trek/shield.c

   1 /*      $NetBSD: shield.c,v 1.12 2009/05/25 00:43:34 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 1.12 2009/05/25 00:43:34 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 static const struct cvntab Udtab[] = {
  63         { "u",          "p",            (cmdfun)1,      0 },
  64         { "d",          "own",          (cmdfun)0,      0 },
  65         { NULL,         NULL,           NULL,           0 }
  66 };
  67
  68 void
  69 shield(int f)
  70 {
  71         int             i;
  72         const struct cvntab     *r;
  73         char            s[100];
  74         const char      *device, *dev2, *dev3;
  75         int             ind;
  76         char            *stat;
  77
  78         if (f > 0 && (Ship.shldup || damaged(SRSCAN)))
  79                 return;
  80         if (f < 0) {
  81                 /* cloaking device */
  82                 if (Ship.ship == QUEENE) {
  83                         printf("Ye Faire Queene does not have the "
  84                                "cloaking device.\n");
  85                         return;
  86                 }
  87                 device = "Cloaking device";
  88                 dev2 = "is";
  89                 ind = CLOAK;
  90                 dev3 = "it";
  91                 stat = &Ship.cloaked;
  92         } else {
  93                 /* shields */
  94                 device = "Shields";
  95                 dev2 = "are";
  96                 dev3 = "them";
  97                 ind = SHIELD;
  98                 stat = &Ship.shldup;
  99         }
 100         if (damaged(ind)) {
 101                 if (f <= 0)
 102                         out(ind);
 103                 return;
 104         }
 105         if (Ship.cond == DOCKED) {
 106                 printf("%s %s down while docked\n", device, dev2);
 107                 return;
 108         }
 109         if (f <= 0 && !testnl()) {
 110                 r = getcodpar("Up or down", Udtab);
 111                 i = (long) r->value;
 112         } else {
 113                 if (*stat)
 114                         (void)snprintf(s, sizeof(s),
 115                                 "%s %s up.  Do you want %s down",
 116                                 device, dev2, dev3);
 117                 else
 118                         (void)snprintf(s, sizeof(s),
 119                                 "%s %s down.  Do you want %s up",
 120                                 device, dev2, dev3);
 121                 if (!getynpar(s))
 122                         return;
 123                 i = !*stat;
 124         }
 125         if (*stat == i) {
 126                 printf("%s already ", device);
 127                 if (i)
 128                         printf("up\n");
 129                 else
 130                         printf("down\n");
 131                 return;
 132         }
 133         if (i) {
 134                 if (f >= 0)
 135                         Ship.energy -= Param.shupengy;
 136                 else
 137                         Ship.cloakgood = 0;
 138         }
 139         Move.free = 0;
 140         if (f >= 0)
 141                 Move.shldchg = 1;
 142         *stat = i;
 143         return;
 144 }