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

/*
 * Copyright (c) 1983 Regents of the University of California,
 * All rights reserved.  Redistribution permitted subject to
 * the terms of the Berkeley Software License Agreement.
 */

#ifndef lint
static	char *sccsid = "@(#)game.c	2.2 85/04/23";
#endif

#include "externs.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);
}