[apple/libc.git] / gen / FreeBSD / erand48.c

/*
 * Copyright (c) 1993 Martin Birgmeier
 * All rights reserved.
 *
 * You may redistribute unmodified or modified versions of this source
 * code provided that the above copyright notice and this and the
 * following conditions are retained.
 *
 * This software is provided ``as is'', and comes with no warranties
 * of any kind. I shall in no event be liable for anything that happens
 * to anyone/anything when using this software.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/gen/erand48.c,v 1.2 2002/03/22 21:52:05 obrien Exp $");

#include "rand48.h"

double
erand48(unsigned short xseed[3])
{
	_dorand48(xseed);
	return ldexp((double) xseed[0], -48) +
	       ldexp((double) xseed[1], -32) +
	       ldexp((double) xseed[2], -16);
}
Commit	Line	Data
5b2abdfb A	1	/*
	2	* Copyright (c) 1993 Martin Birgmeier
	3	* All rights reserved.
	4	*
	5	* You may redistribute unmodified or modified versions of this source
	6	* code provided that the above copyright notice and this and the
	7	* following conditions are retained.
	8	*
	9	* This software is provided ``as is'', and comes with no warranties
	10	* of any kind. I shall in no event be liable for anything that happens
	11	* to anyone/anything when using this software.
	12	*/
	13
9385eb3d A	14	#include <sys/cdefs.h>
	15	__FBSDID("$FreeBSD: src/lib/libc/gen/erand48.c,v 1.2 2002/03/22 21:52:05 obrien Exp $");
	16
5b2abdfb A	17	#include "rand48.h"
	18
	19	double
	20	erand48(unsigned short xseed[3])
	21	{
	22	_dorand48(xseed);
	23	return ldexp((double) xseed[0], -48) +
	24	ldexp((double) xseed[1], -32) +
	25	ldexp((double) xseed[2], -16);
	26	}