glibc/stdlib/seed48_r.c

/* Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#include <stdlib.h>
#include <string.h>

int
seed48_r (seed16v, buffer)
     unsigned short int seed16v[3];
     struct drand48_data *buffer;
{
  /* Save old value at a private place to be used as return value.  */
  memcpy (buffer->old_X, buffer->X, sizeof (buffer->X));

  /* Install new state.  */
  memcpy (buffer->X, seed16v, sizeof (buffer->X));

  return 0;
}