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57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
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/* Test random_r.
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Copyright (C) 2008 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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#define ASSERT(expr) \
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do \
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{ \
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if (!(expr)) \
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{ \
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fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
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fflush (stderr); \
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abort (); \
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} \
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} \
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while (0)
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int
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main ()
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{
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struct random_data rand_state;
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char buf[128];
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unsigned int i;
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unsigned int n_big = 0;
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rand_state.state = NULL;
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if (initstate_r (time (NULL), buf, sizeof buf, &rand_state))
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return 1;
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for (i = 0; i < 1000; i++)
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{
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int32_t r;
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ASSERT (random_r (&rand_state, &r) == 0);
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ASSERT (0 <= r);
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if (RAND_MAX / 2 < r)
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++n_big;
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}
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/* Fail if none of the numbers were larger than RAND_MAX / 2. */
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return !n_big;
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}
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