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game.c revision 1.1 
      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[] = "@(#)game.c	5.4 (Berkeley) 6/1/90";
     36 #endif /* not lint */
     37 
     38 #include "externs.h"
     39 
     40 maxturns(ship, af)
     41 register struct ship *ship;
     42 char *af;
     43 {
     44 	register int turns;
     45 
     46 	turns = ship->specs->ta;
     47 	if (*af = (ship->file->drift > 1 && turns)) {
     48 		turns--;
     49 		if (ship->file->FS == 1)
     50 			turns = 0;
     51 	}
     52 	return turns;
     53 }
     54 
     55 maxmove(ship, dir, fs)
     56 register struct ship *ship;
     57 int dir, fs;
     58 {
     59 	register int riggone = 0, Move, flank = 0;
     60 
     61 	Move = ship->specs->bs;
     62 	if (!ship->specs->rig1)
     63 		riggone++;
     64 	if (!ship->specs->rig2)
     65 		riggone++;
     66 	if (!ship->specs->rig3)
     67 		riggone++;
     68 	if (!ship->specs->rig4)
     69 		riggone++;
     70 	if ((ship->file->FS || fs) && fs != -1) {
     71 		flank = 1;
     72 		Move = ship->specs->fs;
     73 	}
     74 	if (dir == winddir)
     75 		Move -= 1 + WET[windspeed][ship->specs->class-1].B;
     76 	else if (dir == winddir + 2 || dir == winddir - 2 || dir == winddir - 6 || dir == winddir + 6)
     77 		Move -= 1 + WET[windspeed][ship->specs->class-1].C;
     78 	else if (dir == winddir + 3 || dir == winddir - 3 || dir == winddir - 5 || dir == winddir + 5)
     79 		Move = (flank ? 2 : 1) - WET[windspeed][ship->specs->class-1].D;
     80 	else if (dir == winddir + 4 || dir == winddir - 4)
     81 		Move = 0;
     82 	else
     83 		Move -= WET[windspeed][ship->specs->class-1].A;
     84 	Move -= riggone;
     85 	Move = Move < 0 ? 0 : Move;
     86 	return(Move);
     87 }
     88