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      1 /*	$NetBSD: game.c,v 1.13 2009/03/14 20:04:43 dholland 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. 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[] = "@(#)game.c	8.2 (Berkeley) 4/28/95";
     36 #else
     37 __RCSID("$NetBSD: game.c,v 1.13 2009/03/14 20:04:43 dholland Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <sys/types.h>
     42 #include <stdbool.h>
     43 #include "extern.h"
     44 
     45 int
     46 maxturns(struct ship *ship, bool *af)
     47 {
     48 	int turns;
     49 
     50 	turns = ship->specs->ta;
     51 	*af = (ship->file->drift > 1 && turns);
     52 	if (*af != false) {
     53 		turns--;
     54 		if (ship->file->FS == 1)
     55 			turns = 0;
     56 	}
     57 	return turns;
     58 }
     59 
     60 int
     61 maxmove(struct ship *ship, int dir, int fs)
     62 {
     63 	int riggone = 0, Move, flank = 0;
     64 
     65 	Move = ship->specs->bs;
     66 	if (!ship->specs->rig1)
     67 		riggone++;
     68 	if (!ship->specs->rig2)
     69 		riggone++;
     70 	if (!ship->specs->rig3)
     71 		riggone++;
     72 	if (!ship->specs->rig4)
     73 		riggone++;
     74 	if ((ship->file->FS || fs) && fs != -1) {
     75 		flank = 1;
     76 		Move = ship->specs->fs;
     77 	}
     78 	if (dir == winddir)
     79 		Move -= 1 + WET[windspeed][ship->specs->class-1].B;
     80 	else if (dir == winddir + 2 || dir == winddir - 2 ||
     81 		 dir == winddir - 6 || dir == winddir + 6)
     82 		Move -= 1 + WET[windspeed][ship->specs->class-1].C;
     83 	else if (dir == winddir + 3 || dir == winddir - 3 ||
     84 		 dir == winddir - 5 || dir == winddir + 5)
     85 		Move = (flank ? 2 : 1) - WET[windspeed][ship->specs->class-1].D;
     86 	else if (dir == winddir + 4 || dir == winddir - 4)
     87 		Move = 0;
     88 	else
     89 		Move -= WET[windspeed][ship->specs->class-1].A;
     90 	Move -= riggone;
     91 	Move = Move < 0 ? 0 : Move;
     92 	return(Move);
     93 }
     94