167 lines
3.7 KiB
C
167 lines
3.7 KiB
C
/* test mpz_divisible_p and mpz_divisible_ui_p
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Copyright 2001, 2009 Free Software Foundation, Inc.
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This file is part of the GNU MP Library test suite.
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The GNU MP Library test suite is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 3 of the License,
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or (at your option) any later version.
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The GNU MP Library test suite is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along with
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the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "gmp-impl.h"
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#include "tests.h"
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void
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check_one (mpz_srcptr a, mpz_srcptr d, int want)
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{
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int got;
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if (mpz_fits_ulong_p (d))
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{
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unsigned long u = mpz_get_ui (d);
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got = (mpz_divisible_ui_p (a, u) != 0);
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if (want != got)
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{
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printf ("mpz_divisible_ui_p wrong\n");
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printf (" expected %d got %d\n", want, got);
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mpz_trace (" a", a);
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printf (" d=%lu\n", u);
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mp_trace_base = -16;
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mpz_trace (" a", a);
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printf (" d=0x%lX\n", u);
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abort ();
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}
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}
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got = (mpz_divisible_p (a, d) != 0);
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if (want != got)
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{
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printf ("mpz_divisible_p wrong\n");
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printf (" expected %d got %d\n", want, got);
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mpz_trace (" a", a);
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mpz_trace (" d", d);
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mp_trace_base = -16;
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mpz_trace (" a", a);
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mpz_trace (" d", d);
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abort ();
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}
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}
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void
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check_data (void)
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{
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static const struct {
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const char *a;
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const char *d;
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int want;
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} data[] = {
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{ "0", "0", 1 },
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{ "17", "0", 0 },
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{ "0", "1", 1 },
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{ "123", "1", 1 },
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{ "-123", "1", 1 },
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{ "0", "2", 1 },
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{ "1", "2", 0 },
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{ "2", "2", 1 },
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{ "-2", "2", 1 },
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{ "0x100000000000000000000000000000000", "2", 1 },
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{ "0x100000000000000000000000000000001", "2", 0 },
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{ "0x3333333333333333", "3", 1 },
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{ "0x3333333333333332", "3", 0 },
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{ "0x33333333333333333333333333333333", "3", 1 },
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{ "0x33333333333333333333333333333332", "3", 0 },
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/* divisor changes from 2 to 1 limb after stripping 2s */
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{ "0x3333333300000000", "0x180000000", 1 },
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{ "0x33333333333333330000000000000000", "0x18000000000000000", 1 },
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{ "0x133333333333333330000000000000000", "0x18000000000000000", 0 },
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};
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mpz_t a, d;
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int i;
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mpz_init (a);
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mpz_init (d);
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for (i = 0; i < numberof (data); i++)
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{
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mpz_set_str_or_abort (a, data[i].a, 0);
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mpz_set_str_or_abort (d, data[i].d, 0);
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check_one (a, d, data[i].want);
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}
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mpz_clear (a);
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mpz_clear (d);
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}
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void
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check_random (int reps)
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{
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gmp_randstate_ptr rands = RANDS;
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mpz_t a, d, r;
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int i;
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int want;
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mpz_init (a);
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mpz_init (d);
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mpz_init (r);
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for (i = 0; i < reps; i++)
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{
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mpz_erandomb (a, rands, 1 << 19);
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mpz_erandomb_nonzero (d, rands, 1 << 18);
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mpz_fdiv_r (r, a, d);
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want = (mpz_sgn (r) == 0);
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check_one (a, d, want);
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mpz_sub (a, a, r);
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check_one (a, d, 1);
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if (mpz_cmpabs_ui (d, 1L) == 0)
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continue;
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mpz_add_ui (a, a, 1L);
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check_one (a, d, 0);
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}
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mpz_clear (a);
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mpz_clear (d);
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mpz_clear (r);
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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 reps = 100;
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tests_start ();
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TESTS_REPS (reps, argv, argc);
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check_data ();
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check_random (reps);
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tests_end ();
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exit (0);
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}
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