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game.c revision 1.6 
      1 /*	$NetBSD: game.c,v 1.6 1999/09/17 17:07:11 jsm Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1983, 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[] = "@(#)game.c	8.2 (Berkeley) 4/28/95";
     40 #else
     41 __RCSID("$NetBSD: game.c,v 1.6 1999/09/17 17:07:11 jsm Exp $");
     42 #endif
     43 #endif /* not lint */
     44 
     45 #include "extern.h"
     46 
     47 int
     48 maxturns(ship, af)
     49 struct ship *ship;
     50 char *af;
     51 {
     52 	int turns;
     53 
     54 	turns = ship->specs->ta;
     55 	*af = (ship->file->drift > 1 && turns);
     56 	if (*af != '\0') {
     57 		turns--;
     58 		if (ship->file->FS == 1)
     59 			turns = 0;
     60 	}
     61 	return turns;
     62 }
     63 
     64 int
     65 maxmove(ship, dir, fs)
     66 struct ship *ship;
     67 int dir, fs;
     68 {
     69 	int riggone = 0, Move, flank = 0;
     70 
     71 	Move = ship->specs->bs;
     72 	if (!ship->specs->rig1)
     73 		riggone++;
     74 	if (!ship->specs->rig2)
     75 		riggone++;
     76 	if (!ship->specs->rig3)
     77 		riggone++;
     78 	if (!ship->specs->rig4)
     79 		riggone++;
     80 	if ((ship->file->FS || fs) && fs != -1) {
     81 		flank = 1;
     82 		Move = ship->specs->fs;
     83 	}
     84 	if (dir == winddir)
     85 		Move -= 1 + WET[windspeed][ship->specs->class-1].B;
     86 	else if (dir == winddir + 2 || dir == winddir - 2 || dir == winddir - 6 || dir == winddir + 6)
     87 		Move -= 1 + WET[windspeed][ship->specs->class-1].C;
     88 	else if (dir == winddir + 3 || dir == winddir - 3 || dir == winddir - 5 || dir == winddir + 5)
     89 		Move = (flank ? 2 : 1) - WET[windspeed][ship->specs->class-1].D;
     90 	else if (dir == winddir + 4 || dir == winddir - 4)
     91 		Move = 0;
     92 	else
     93 		Move -= WET[windspeed][ship->specs->class-1].A;
     94 	Move -= riggone;
     95 	Move = Move < 0 ? 0 : Move;
     96 	return(Move);
     97 }
     98