162 lines
3.5 KiB
C
162 lines
3.5 KiB
C
/* Test mpz_urandomm.
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Copyright 2002 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "tests.h"
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#ifndef TRUE
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#define TRUE (1)
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#endif
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#ifndef FALSE
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#define FALSE (0)
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#endif
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int
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check_params (void)
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{
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gmp_randstate_t r1, r2;
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mpz_t a, b, m;
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int i;
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int result;
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result = TRUE;
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mpz_init (a);
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mpz_init (b);
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mpz_init (m);
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if (result)
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{
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/* Test the consistency between urandomm and urandomb. */
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gmp_randinit_default (r1);
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gmp_randinit_default (r2);
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gmp_randseed_ui (r1, 85L);
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gmp_randseed_ui (r2, 85L);
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mpz_set_ui (m, 0L);
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mpz_setbit (m, 80L);
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for (i = 0; i < 100; i++)
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{
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mpz_urandomm (a, r1, m);
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mpz_urandomb (b, r2, 80L);
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if (mpz_cmp (a, b) != 0)
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{
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result = FALSE;
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printf ("mpz_urandomm != mpz_urandomb\n");
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break;
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}
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}
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gmp_randclear (r1);
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gmp_randclear (r2);
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}
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if (result)
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{
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/* Test that mpz_urandomm returns the correct result with a
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broken LC. */
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mpz_set_ui (a, 0L);
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gmp_randinit_lc_2exp (r1, a, 0xffL, 8L);
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mpz_set_ui (m, 5L);
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/* Warning: This code hangs in gmp 4.1 and below */
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for (i = 0; i < 100; i++)
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{
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mpz_urandomm (a, r1, m);
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if (mpz_cmp_ui (a, 2L) != 0)
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{
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result = FALSE;
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gmp_printf ("mpz_urandomm returns %Zd instead of 2\n", a);
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break;
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}
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}
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gmp_randclear (r1);
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}
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if (result)
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{
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/* Test that the results are always in range for either
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positive or negative values of m. */
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gmp_randinit_default (r1);
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mpz_set_ui (m, 5L);
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mpz_set_si (b, -5L);
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for (i = 0; i < 100; i++)
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{
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mpz_urandomm (a, r1, m);
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if (mpz_cmp_ui (a, 5L) >= 0 || mpz_sgn (a) < 0)
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{
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result = FALSE;
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gmp_printf ("Out-of-range or non-positive value: %Zd\n", a);
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break;
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}
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mpz_urandomm (a, r1, b);
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if (mpz_cmp_ui (a, 5L) >= 0 || mpz_sgn (a) < 0)
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{
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result = FALSE;
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gmp_printf ("Out-of-range or non-positive value (from negative modulus): %Zd\n", a);
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break;
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}
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}
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gmp_randclear (r1);
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}
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if (result)
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{
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/* Test that m=1 forces always result=0. */
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gmp_randinit_default (r1);
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mpz_set_ui (m, 1L);
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for (i = 0; i < 100; i++)
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{
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mpz_urandomm (a, r1, m);
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if (mpz_sgn (a) != 0)
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{
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result = FALSE;
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gmp_printf ("mpz_urandomm fails with m=1 (result=%Zd)\n", a);
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break;
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}
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}
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gmp_randclear (r1);
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}
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mpz_clear (a);
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mpz_clear (b);
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mpz_clear (m);
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return result;
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}
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int
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main (int argc, char *argv[])
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{
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int result = TRUE;
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tests_start ();
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if (result)
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if (!check_params ())
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result = FALSE;
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tests_end ();
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if (result)
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return 0; /* pass */
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else
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return 1; /* fail */
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}
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