libc/upstream-netbsd/lib/libc/stdlib/nrand48.c

/*	$NetBSD: nrand48.c,v 1.10 2013/10/22 08:08:51 matt Exp $	*/

/*
 * 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>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: nrand48.c,v 1.10 2013/10/22 08:08:51 matt Exp $");
#endif /* LIBC_SCCS and not lint */

#include "namespace.h"

#include <assert.h>

#include "rand48.h"

#ifdef __weak_alias
__weak_alias(nrand48,_nrand48)
#endif

long
nrand48(unsigned short xseed[3])
{
	_DIAGASSERT(xseed != NULL);

	__dorand48(xseed);
	return xseed[2] * 32768 + (xseed[1] >> 1);
}