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[glibc.git] / stdlib / seed48_r.c
blob4644ff2440e603582a5b2e237b62c56a701fb571
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.
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.
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.
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. */
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 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;
40 return 0;
42 weak_alias (__seed48_r, seed48_r)