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/* Test random_r.
Copyright (C) 2008-2023 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_r, int, (unsigned int, struct random_data *));
SIGNATURE_CHECK (initstate_r, int, (unsigned int, char *, size_t,
struct random_data *));
SIGNATURE_CHECK (setstate_r, int, (char *, struct random_data *));
SIGNATURE_CHECK (random_r, int, (struct random_data *, int32_t *));
#include <time.h>
#include "macros.h"
static int
test_failed (int alignment)
{
struct random_data rand_state;
char buf[128 + sizeof (int32_t)];
unsigned int i;
unsigned int n_big = 0;
rand_state.state = NULL;
if (initstate_r (time (NULL), buf + alignment, sizeof buf - alignment,
&rand_state))
return 1;
for (i = 0; i < 1000; i++)
{
int32_t r;
ASSERT (random_r (&rand_state, &r) == 0);
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;
}
int
main ()
{
int alignment;
for (alignment = 0; alignment < sizeof (int32_t); alignment++)
if (test_failed (alignment))
return 1;
return 0;
}
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