t-get_si.c
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上传日期:2022-08-06
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- /* Exercise mpz_get_si.
- Copyright 2000, 2001 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 "gmp.h"
- #include "gmp-impl.h"
- #include "tests.h"
- void
- check_data (void)
- {
- static const struct {
- const char *n;
- long want;
- } data[] = {
- { "0", 0L },
- { "1", 1L },
- { "-1", -1L },
- { "2", 2L },
- { "-2", -2L },
- { "12345", 12345L },
- { "-12345", -12345L },
- };
- int i;
- mpz_t n;
- long got;
- mpz_init (n);
- for (i = 0; i < numberof (data); i++)
- {
- mpz_set_str_or_abort (n, data[i].n, 0);
- got = mpz_get_si (n);
- if (got != data[i].want)
- {
- printf ("mpz_get_si wrong at data[%d]n", i);
- printf (" n "%s" (", data[i].n);
- mpz_out_str (stdout, 10, n); printf (", hex ");
- mpz_out_str (stdout, 16, n); printf (")n");
- printf (" got %ld (0x%lX)n", got, got);
- printf (" want %ld (0x%lX)n", data[i].want, data[i].want);
- abort();
- }
- }
- mpz_clear (n);
- }
- void
- check_max (void)
- {
- mpz_t n;
- long want;
- long got;
- mpz_init (n);
- #define CHECK_MAX(name)
- if (got != want)
- {
- printf ("mpz_get_si wrong on %sn", name);
- printf (" n ");
- mpz_out_str (stdout, 10, n); printf (", hex ");
- mpz_out_str (stdout, 16, n); printf ("n");
- printf (" got %ld, hex %lXn", got, got);
- printf (" want %ld, hex %lXn", want, want);
- abort();
- }
- want = LONG_MAX;
- mpz_set_si (n, want);
- got = mpz_get_si (n);
- CHECK_MAX ("LONG_MAX");
- want = LONG_MIN;
- mpz_set_si (n, want);
- got = mpz_get_si (n);
- CHECK_MAX ("LONG_MIN");
- /* The following checks that -0x100000000 gives -0x80000000. This doesn't
- actually fit in a long and the result from mpz_get_si() is undefined,
- but -0x80000000 is what comes out currently, and it should be that
- value irrespective of the mp_limb_t size (long or long long). */
- want = LONG_MIN;
- mpz_mul_2exp (n, n, 1);
- CHECK_MAX ("-0x100...00");
- mpz_clear (n);
- }
- int
- main (void)
- {
- tests_start ();
- check_data ();
- check_max ();
- tests_end ();
- exit (0);
- }