t-cmp_d.c
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上传日期:2022-08-06
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- /* Test mpf_cmp_d.
- Copyright 2001, 2003, 2003, 2005 Free Software Foundation, Inc.
- This file is part of the GNU MP Library.
- The GNU MP Library is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 3 of the License, or (at your
- option) any later version.
- The GNU MP Library 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 Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- #include "tests.h"
- #define SGN(n) ((n) > 0 ? 1 : (n) < 0 ? -1 : 0)
- void
- check_one (const char *name, mpf_srcptr x, double y, int cmp)
- {
- int got;
- got = mpf_cmp_d (x, y);
- if (SGN(got) != cmp)
- {
- int i;
- printf ("mpf_cmp_d wrong (from %s)n", name);
- printf (" got %dn", got);
- printf (" want %dn", cmp);
- mpf_trace (" x", x);
- printf (" y %gn", y);
- mp_trace_base=-16;
- mpf_trace (" x", x);
- printf (" y %gn", y);
- printf (" y");
- for (i = 0; i < sizeof(y); i++)
- printf (" %02X", (unsigned) ((unsigned char *) &y)[i]);
- printf ("n");
- abort ();
- }
- }
- void
- check_infinity (void)
- {
- mpf_t x;
- double y = tests_infinity_d ();
- if (y == 0.0)
- return;
- mpf_init (x);
- /* 0 cmp inf */
- mpf_set_ui (x, 0L);
- check_one ("check_infinity", x, y, -1);
- check_one ("check_infinity", x, -y, 1);
- /* 123 cmp inf */
- mpf_set_ui (x, 123L);
- check_one ("check_infinity", x, y, -1);
- check_one ("check_infinity", x, -y, 1);
- /* -123 cmp inf */
- mpf_set_si (x, -123L);
- check_one ("check_infinity", x, y, -1);
- check_one ("check_infinity", x, -y, 1);
- /* 2^5000 cmp inf */
- mpf_set_ui (x, 1L);
- mpf_mul_2exp (x, x, 5000L);
- check_one ("check_infinity", x, y, -1);
- check_one ("check_infinity", x, -y, 1);
- /* -2^5000 cmp inf */
- mpf_neg (x, x);
- check_one ("check_infinity", x, y, -1);
- check_one ("check_infinity", x, -y, 1);
- mpf_clear (x);
- }
- int
- main (int argc, char *argv[])
- {
- tests_start ();
- check_infinity ();
- tests_end ();
- exit (0);
- }