erand48.c revision 92986 
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
14#include <sys/cdefs.h>
15__FBSDID("$FreeBSD: head/lib/libc/gen/erand48.c 92986 2002-03-22 21:53:29Z obrien $");
16
17#include "rand48.h"
18
19double
20erand48(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}
27