1 /*        $NetBSD: seed48.c,v 1.8 2005/06/12 05:21:28 lukem Exp $     */
2 
3 /*
4  * Copyright (c) 1993 Martin Birgmeier
5  * All rights reserved.
6  *
7  * You may redistribute unmodified or modified versions of this source
8  * code provided that the above copyright notice and this and the
9  * following conditions are retained.
10  *
11  * This software is provided ``as is'', and comes with no warranties
12  * of any kind. I shall in no event be liable for anything that happens
13  * to anyone/anything when using this software.
14  */
15 
16 #include <sys/cdefs.h>
17 #if defined(LIBC_SCCS) && !defined(lint)
18 __RCSID("$NetBSD: seed48.c,v 1.8 2005/06/12 05:21:28 lukem Exp $");
19 #endif /* LIBC_SCCS and not lint */
20 
21 #include "namespace.h"
22 
23 #include <assert.h>
24 
25 #include "rand48.h"
26 
27 #ifdef __weak_alias
__weak_alias(seed48,_seed48)28 __weak_alias(seed48,_seed48)
29 #endif
30 
31 unsigned short *
32 seed48(unsigned short xseed[3])
33 {
34           static unsigned short sseed[3];
35 
36           _DIAGASSERT(xseed != NULL);
37 
38           sseed[0] = __rand48_seed[0];
39           sseed[1] = __rand48_seed[1];
40           sseed[2] = __rand48_seed[2];
41           __rand48_seed[0] = xseed[0];
42           __rand48_seed[1] = xseed[1];
43           __rand48_seed[2] = xseed[2];
44           __rand48_mult[0] = RAND48_MULT_0;
45           __rand48_mult[1] = RAND48_MULT_1;
46           __rand48_mult[2] = RAND48_MULT_2;
47           __rand48_add = RAND48_ADD;
48           return sseed;
49 }
50