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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24 int
  25 main (void)
  26 {
  27   int pass;
  28   int ret = 0;
  29   long int r[2];
  30
  31   for (pass = 0; pass < 2; pass++)
  32     {
  33       srandom (0x12344321);
  34
  35       int j;
  36       for (j = 0; j < 3; ++j)
  37         random ();
  38       if (pass == 1)
  39         {
  40           char state[128];
  41           char *ostate = initstate (0x34562101, state, 128);
  42           if (setstate (ostate) != state)
  43             {
  44               puts ("setstate (ostate) != state");
  45               ret = 1;
  46             }
  47         }
  48
  49       random ();
  50       r[pass] = random ();
  51     }
  52
  53   if (r[0] != r[1])
  54     {
  55       printf ("%ld != %ld\n", r[0], r[1]);
  56       ret = 1;
  57     }
  58   return ret;
  59 }