glibc/stdlib/tst-random2.c

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/* Test initstate saving the old state.
Copyright (C) 2005-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2005.
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 <stdio.h>
#include <stdlib.h>
int
main (void)
{
int pass;
int ret = 0;
long int r[2];
for (pass = 0; pass < 2; pass++)
{
srandom (0x12344321);
int j;
for (j = 0; j < 3; ++j)
random ();
if (pass == 1)
{
char state[128];
char *ostate = initstate (0x34562101, state, 128);
if (setstate (ostate) != state)
{
puts ("setstate (ostate) != state");
ret = 1;
}
}
random ();
r[pass] = random ();
}
if (r[0] != r[1])
{
printf ("%ld != %ld\n", r[0], r[1]);
ret = 1;
}
return ret;
}