Home | History | Annotate | Line # | Download | only in sail
game.c revision 1.2 
      1 /*
      2  * Copyright (c) 1983 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 /*static char sccsid[] = "from: @(#)game.c	5.4 (Berkeley) 6/1/90";*/
     36 static char rcsid[] = "$Id: game.c,v 1.2 1993/08/01 18:51:47 mycroft Exp $";
     37 #endif /* not lint */
     38 
     39 #include "externs.h"
     40 
     41 maxturns(ship, af)
     42 register struct ship *ship;
     43 char *af;
     44 {
     45 	register int turns;
     46 
     47 	turns = ship->specs->ta;
     48 	if (*af = (ship->file->drift > 1 && turns)) {
     49 		turns--;
     50 		if (ship->file->FS == 1)
     51 			turns = 0;
     52 	}
     53 	return turns;
     54 }
     55 
     56 maxmove(ship, dir, fs)
     57 register struct ship *ship;
     58 int dir, fs;
     59 {
     60 	register int riggone = 0, Move, flank = 0;
     61 
     62 	Move = ship->specs->bs;
     63 	if (!ship->specs->rig1)
     64 		riggone++;
     65 	if (!ship->specs->rig2)
     66 		riggone++;
     67 	if (!ship->specs->rig3)
     68 		riggone++;
     69 	if (!ship->specs->rig4)
     70 		riggone++;
     71 	if ((ship->file->FS || fs) && fs != -1) {
     72 		flank = 1;
     73 		Move = ship->specs->fs;
     74 	}
     75 	if (dir == winddir)
     76 		Move -= 1 + WET[windspeed][ship->specs->class-1].B;
     77 	else if (dir == winddir + 2 || dir == winddir - 2 || dir == winddir - 6 || dir == winddir + 6)
     78 		Move -= 1 + WET[windspeed][ship->specs->class-1].C;
     79 	else if (dir == winddir + 3 || dir == winddir - 3 || dir == winddir - 5 || dir == winddir + 5)
     80 		Move = (flank ? 2 : 1) - WET[windspeed][ship->specs->class-1].D;
     81 	else if (dir == winddir + 4 || dir == winddir - 4)
     82 		Move = 0;
     83 	else
     84 		Move -= WET[windspeed][ship->specs->class-1].A;
     85 	Move -= riggone;
     86 	Move = Move < 0 ? 0 : Move;
     87 	return(Move);
     88 }
     89