stdlib/tst-random2.c

   1 /* Test initstate saving the old state.
   2    Copyright (C) 2005-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21
  22 static int
  23 do_test (void)
  24 {
  25   int pass;
  26   int ret = 0;
  27   long int r[2];
  28
  29   for (pass = 0; pass < 2; pass++)
  30     {
  31       srandom (0x12344321);
  32
  33       int j;
  34       for (j = 0; j < 3; ++j)
  35         random ();
  36       if (pass == 1)
  37         {
  38           char state[128];
  39           char *ostate = initstate (0x34562101, state, 128);
  40           if (setstate (ostate) != state)
  41             {
  42               puts ("setstate (ostate) != state");
  43               ret = 1;
  44             }
  45         }
  46
  47       random ();
  48       r[pass] = random ();
  49     }
  50
  51   if (r[0] != r[1])
  52     {
  53       printf ("%ld != %ld\n", r[0], r[1]);
  54       ret = 1;
  55     }
  56   return ret;
  57 }
  58
  59 #define TEST_FUNCTION do_test ()
  60 #include "../test-skeleton.c"