xref: /haiku/src/system/libroot/posix/glibc/stdlib/seed48_r.c (revision 2600324b57fa31cdea1627d584d314f2a579c4a8)
1 /* Copyright (C) 1995, 1997, 1998, 2001 Free Software Foundation, Inc.
2    This file is part of the GNU C Library.
3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
4 
5    The GNU C Library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9 
10    The GNU C Library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14 
15    You should have received a copy of the GNU Lesser General Public
16    License along with the GNU C Library; if not, write to the Free
17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18    02111-1307 USA.  */
19 
20 #include <stdlib.h>
21 #include <string.h>
22 #include <limits.h>
23 
24 int
25 __seed48_r (seed16v, buffer)
26      unsigned short int seed16v[3];
27      struct drand48_data *buffer;
28 {
29   /* Save old value at a private place to be used as return value.  */
30   memcpy (buffer->__old_x, buffer->__x, sizeof (buffer->__x));
31 
32   /* Install new state.  */
33   buffer->__x[2] = seed16v[2];
34   buffer->__x[1] = seed16v[1];
35   buffer->__x[0] = seed16v[0];
36   buffer->__a = 0x5deece66dull;
37   buffer->__c = 0xb;
38   buffer->__init = 1;
39 
40   return 0;
41 }
42 weak_alias (__seed48_r, seed48_r)
43