/* Reentrant random function from POSIX.1c.

   Copyright (C) 1996-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <stdlib.h>

/* This algorithm is mentioned in the ISO C standard, here extended

   for 32 bits.  */

int

rand_r (unsigned int *seed)

{

  unsigned int next = *seed;

  int result;

  next *= 1103515245;

  next += 12345;

  result = (unsigned int) (next / 65536) % 2048;

  next *= 1103515245;

  next += 12345;

  result <<= 10;

  result ^= (unsigned int) (next / 65536) % 1024;

  next *= 1103515245;

  next += 12345;

  result <<= 10;

  result ^= (unsigned int) (next / 65536) % 1024;

  *seed = next;

  return result;

}