stdlib/tst-random2.c

   1 /* Test initstate saving the old state.
   2    Copyright (C) 2005 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jakub Jelinek <jakub@redhat.com>, 2005.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22
  23 int
  24 main (void)
  25 {
  26   int pass;
  27   int ret = 0;
  28   long int r[2];
  29
  30   for (pass = 0; pass < 2; pass++)
  31     {
  32       srandom (0x12344321);
  33
  34       int j;
  35       for (j = 0; j < 3; ++j)
  36         random ();
  37       if (pass == 1)
  38         {
  39           char state[128];
  40           char *ostate = initstate (0x34562101, state, 128);
  41           if (setstate (ostate) != state)
  42             {
  43               puts ("setstate (ostate) != state");
  44               ret = 1;
  45             }
  46         }
  47
  48       random ();
  49       r[pass] = random ();
  50     }
  51
  52   if (r[0] != r[1])
  53     {
  54       printf ("%ld != %ld\n", r[0], r[1]);
  55       ret = 1;
  56     }
  57   return ret;
  58 }