BSD 4_4_Lite2 release

[unix-history] / usr / src / games / sail / game.c

/*
* Copyright (c) 1983, 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[] = "@(#)game.c      8.2 (Berkeley) 4/28/95";
#endif /* not lint */

#include "extern.h"

maxturns(ship, af)
register struct ship *ship;
char *af;
{
       register int turns;

       turns = ship->specs->ta;
       if (*af = (ship->file->drift > 1 && turns)) {
               turns--;
               if (ship->file->FS == 1)
                       turns = 0;
       }
       return turns;
}

maxmove(ship, dir, fs)
register struct ship *ship;
int dir, fs;
{
       register int riggone = 0, Move, flank = 0;

       Move = ship->specs->bs;
       if (!ship->specs->rig1)
               riggone++;
       if (!ship->specs->rig2)
               riggone++;
       if (!ship->specs->rig3)
               riggone++;
       if (!ship->specs->rig4)
               riggone++;
       if ((ship->file->FS || fs) && fs != -1) {
               flank = 1;
               Move = ship->specs->fs;
       }
       if (dir == winddir)
               Move -= 1 + WET[windspeed][ship->specs->class-1].B;
       else if (dir == winddir + 2 || dir == winddir - 2 || dir == winddir - 6 || dir == winddir + 6)
               Move -= 1 + WET[windspeed][ship->specs->class-1].C;
       else if (dir == winddir + 3 || dir == winddir - 3 || dir == winddir - 5 || dir == winddir + 5)
               Move = (flank ? 2 : 1) - WET[windspeed][ship->specs->class-1].D;
       else if (dir == winddir + 4 || dir == winddir - 4)
               Move = 0;
       else 
               Move -= WET[windspeed][ship->specs->class-1].A;
       Move -= riggone;
       Move = Move < 0 ? 0 : Move;
       return(Move);
}