111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
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/* Test mpq_cmp_ui.
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Copyright 1996, 1997, 2001, 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 <stdlib.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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#define NUM(x) (&((x)->_mp_num))
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#define DEN(x) (&((x)->_mp_den))
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#define SGN(x) ((x) < 0 ? -1 : (x) > 0 ? 1 : 0)
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int
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ref_mpq_cmp_ui (mpq_t a, unsigned long int bn, unsigned long int bd)
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{
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mpz_t ai, bi;
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int cc;
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mpz_init (ai);
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mpz_init (bi);
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mpz_mul_ui (ai, NUM (a), bd);
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mpz_mul_ui (bi, DEN (a), bn);
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cc = mpz_cmp (ai, bi);
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mpz_clear (ai);
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mpz_clear (bi);
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return cc;
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}
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#ifndef SIZE
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#define SIZE 8 /* increasing this lowers the probabilty of finding an error */
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#endif
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int
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main (int argc, char **argv)
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{
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mpq_t a, b;
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mp_size_t size;
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int reps = 10000;
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int i;
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int cc, ccref;
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unsigned long int bn, bd;
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tests_start ();
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if (argc == 2)
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reps = atoi (argv[1]);
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mpq_init (a);
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mpq_init (b);
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for (i = 0; i < reps; i++)
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{
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size = urandom () % SIZE - SIZE/2;
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mpz_random2 (NUM (a), size);
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do
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{
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size = urandom () % SIZE - SIZE/2;
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mpz_random2 (DEN (a), size);
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}
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while (mpz_cmp_ui (DEN (a), 0) == 0);
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mpz_random2 (NUM (b), (mp_size_t) 1);
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mpz_mod_ui (NUM (b), NUM (b), ~(unsigned long int) 0);
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mpz_add_ui (NUM (b), NUM (b), 1);
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mpz_random2 (DEN (b), (mp_size_t) 1);
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mpz_mod_ui (DEN (b), DEN (b), ~(unsigned long int) 0);
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mpz_add_ui (DEN (b), DEN (b), 1);
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mpq_canonicalize (a);
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mpq_canonicalize (b);
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bn = mpz_get_ui (NUM (b));
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bd = mpz_get_ui (DEN (b));
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ccref = ref_mpq_cmp_ui (a, bn, bd);
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cc = mpq_cmp_ui (a, bn, bd);
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if (SGN (ccref) != SGN (cc))
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abort ();
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}
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mpq_clear (a);
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mpq_clear (b);
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tests_end ();
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exit (0);
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}
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