Update.
[glibc.git] / stdlib / seed48_r.c
blob910a2256c6e2af3eb1f0b25c60e868370c741a40
1 /* Copyright (C) 1995, 1997, 1998 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.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <stdlib.h>
21 #include <string.h>
22 #include <limits.h>
24 int
25 __seed48_r (seed16v, buffer)
26 unsigned short int seed16v[3];
27 struct drand48_data *buffer;
29 /* Save old value at a private place to be used as return value. */
30 memcpy (buffer->old_x, buffer->x, sizeof (buffer->x));
32 /* Install new state. */
33 #if USHRT_MAX == 0xffffU
34 buffer->x[2] = seed16v[2];
35 buffer->x[1] = seed16v[1];
36 buffer->x[0] = seed16v[0];
38 buffer->a[2] = 0x5;
39 buffer->a[1] = 0xdeec;
40 buffer->a[0] = 0xe66d;
41 #else
42 buffer->x[2] = (seed16v[2] << 16) | seed16v[1];
43 buffer->x[1] = seed16v[0] << 16;
44 buffer->x[0] = 0;
46 buffer->a[2] = 0x5deecUL;
47 buffer->a[1] = 0xe66d0000UL;
48 buffer->a[0] = 0;
49 #endif
50 buffer->c = 0xb;
51 buffer->init = 1;
53 return 0;
55 weak_alias (__seed48_r, seed48_r)