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/* Test random.
Copyright (C) 2008-2024 Free Software Foundation, Inc.
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, either version 3 of the License, or
(at your option) any later version.
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, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <stdlib.h>
#include "signature.h"
SIGNATURE_CHECK (srandom, void, (unsigned int));
SIGNATURE_CHECK (initstate, char *, (unsigned int, char *, size_t));
SIGNATURE_CHECK (setstate, char *, (char *));
SIGNATURE_CHECK (random, long, (void));
#include <time.h>
#include "macros.h"
int
main ()
{
char buf[128];
unsigned int i;
unsigned int n_big = 0;
initstate (time (NULL), buf, sizeof buf);
for (i = 0; i < 1000; i++)
{
long r = random ();
ASSERT (0 <= r);
if (RAND_MAX / 2 < r)
++n_big;
}
/* Fail if none of the numbers were larger than RAND_MAX / 2. */
return !n_big;
}
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