BSD 4_4 release

[unix-history] / usr / src / games / trek / shield.c

/*
* Copyright (c) 1980, 1993
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char sccsid[] = "@(#)shield.c    8.1 (Berkeley) 5/31/93";
#endif /* not lint */

# include       "trek.h"
# include       "getpar.h"

/*
**  SHIELD AND CLOAKING DEVICE CONTROL
**
**      'f' is one for auto shield up (in case of Condition RED),
**      zero for shield control, and negative one for cloaking
**      device control.
**
**      Called with an 'up' or 'down' on the same line, it puts
**      the shields/cloak into the specified mode.  Otherwise it
**      reports to the user the current mode, and asks if she wishes
**      to change.
**
**      This is not a free move.  Hits that occur as a result of
**      this move appear as though the shields are half up/down,
**      so you get partial hits.
*/

struct cvntab Udtab[] =
{
       "u",            "p",                    (int (*)())1,           0,
       "d",            "own",                  0,              0,
       0
};

shield(f)
int     f;
{
       register int            i;
       char                    c;
       struct cvntab           *r;
       char                    s[100];
       char                    *device, *dev2, *dev3;
       int                     ind;
       char                    *stat;

       if (f > 0 && (Ship.shldup || damaged(SRSCAN)))
               return;
       if (f < 0)
       {
               /* cloaking device */
               if (Ship.ship == QUEENE)
                       return (printf("Ye Faire Queene does not have the cloaking device.\n"));
               device = "Cloaking device";
               dev2 = "is";
               ind = CLOAK;
               dev3 = "it";
               stat = &Ship.cloaked;
       }
       else
       {
               /* shields */
               device = "Shields";
               dev2 = "are";
               dev3 = "them";
               ind = SHIELD;
               stat = &Ship.shldup;
       }
       if (damaged(ind))
       {
               if (f <= 0)
                       out(ind);
               return;
       }
       if (Ship.cond == DOCKED)
       {
               printf("%s %s down while docked\n", device, dev2);
               return;
       }
       if (f <= 0 && !testnl())
       {
               r = getcodpar("Up or down", Udtab);
               i = (int) r->value;
       }
       else
       {
               if (*stat)
                       (void)sprintf(s, "%s %s up.  Do you want %s down", device, dev2, dev3);
               else
                       (void)sprintf(s, "%s %s down.  Do you want %s up", device, dev2, dev3);
               if (!getynpar(s))
                       return;
               i = !*stat;
       }
       if (*stat == i)
       {
               printf("%s already ", device);
               if (i)
                       printf("up\n");
               else
                       printf("down\n");
               return;
       }
       if (i)
               if (f >= 0)
                       Ship.energy -= Param.shupengy;
               else
                       Ship.cloakgood = 0;
       Move.free = 0;
       if (f >= 0)
               Move.shldchg = 1;
       *stat = i;
       return;
}