ndb_rand.c

/*
   Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include <ndb_rand.h>

static unsigned long next= 1;

int ndb_rand(void)
{
  next= next * 1103515245 + 12345;
  return((unsigned)(next/65536) % 32768);
}

void ndb_srand(unsigned seed)
{
  next= seed;
}

int
ndb_rand_r(unsigned * seed)
{
  * seed = (* seed) * 1103515245 + 12345;
  return ((unsigned)(*seed / 65536) % 32768);
}