xref: /openbsd/lib/libc/stdlib/seed48.c (revision 404b540a)
1 /*	$OpenBSD: seed48.c,v 1.3 2005/08/08 08:05:37 espie Exp $ */
2 /*
3  * Copyright (c) 1993 Martin Birgmeier
4  * All rights reserved.
5  *
6  * You may redistribute unmodified or modified versions of this source
7  * code provided that the above copyright notice and this and the
8  * following conditions are retained.
9  *
10  * This software is provided ``as is'', and comes with no warranties
11  * of any kind. I shall in no event be liable for anything that happens
12  * to anyone/anything when using this software.
13  */
14 
15 #include "rand48.h"
16 
17 extern unsigned short __rand48_seed[3];
18 extern unsigned short __rand48_mult[3];
19 extern unsigned short __rand48_add;
20 
21 unsigned short *
22 seed48(unsigned short xseed[3])
23 {
24 	static unsigned short sseed[3];
25 
26 	sseed[0] = __rand48_seed[0];
27 	sseed[1] = __rand48_seed[1];
28 	sseed[2] = __rand48_seed[2];
29 	__rand48_seed[0] = xseed[0];
30 	__rand48_seed[1] = xseed[1];
31 	__rand48_seed[2] = xseed[2];
32 	__rand48_mult[0] = RAND48_MULT_0;
33 	__rand48_mult[1] = RAND48_MULT_1;
34 	__rand48_mult[2] = RAND48_MULT_2;
35 	__rand48_add = RAND48_ADD;
36 	return sseed;
37 }
38