/*****************************************************************************
 * Copyright (c) 2014 Ted John
 * OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
 *
 * This file is part of OpenRCT2.
 *
 * OpenRCT2 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *****************************************************************************/

#include "util.h"

int squaredmetres_to_squaredfeet(int squaredMetres)
{
	// 1 metre squared = 10.7639104 feet squared
	// RCT2 approximates as 11
	return squaredMetres * 11;
}

int metres_to_feet(int metres)
{
	// 1 metre = 3.2808399 feet
	// RCT2 approximates as 3.28125
	return (metres * 840) / 256;
}

int mph_to_kmph(int mph)
{
	// 1 mph = 1.60934 kmph
	// RCT2 approximates as 1.609375
	return (mph * 1648) / 1024;
}

long fsize(FILE *fp)
{
	long originalPosition, size;

	originalPosition = ftell(fp);
	fseek(fp, 0, SEEK_END);
	size = ftell(fp);
	fseek(fp, originalPosition, SEEK_SET);

	return size;
}

int bitscanforward(int source)
{
	int i;

	for (i = 0; i < 32; i++)
		if (source & (1 << i))
			return i;

	return -1;
}