110 lines
2.3 KiB
C
110 lines
2.3 KiB
C
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/* Test mpq_cmp.
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Copyright (C) 1996 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 Library General Public License as published by
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the Free Software Foundation; either version 2 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 Library General Public
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License for more details.
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You should have received a copy of the GNU Library 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., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, 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 "urandom.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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ref_mpq_cmp (a, b)
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mpq_t a, b;
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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 (ai, NUM (a), DEN (b));
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mpz_mul (bi, NUM (b), DEN (a));
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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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main (argc, argv)
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int argc;
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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 = 100000;
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int i;
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int cc, ccref;
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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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size = urandom () % SIZE - SIZE/2;
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mpz_random2 (NUM (b), 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 (b), size);
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}
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while (mpz_cmp_ui (DEN (b), 0) == 0);
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mpq_canonicalize (a);
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mpq_canonicalize (b);
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ccref = ref_mpq_cmp (a, b);
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cc = mpq_cmp (a, b);
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if (SGN (ccref) != SGN (cc))
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abort ();
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}
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exit (0);
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}
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dump (x)
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mpq_t x;
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{
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mpz_out_str (stdout, 10, NUM (x));
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printf ("/");
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mpz_out_str (stdout, 10, DEN (x));
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printf ("\n");
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}
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