From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001 From: Duncan Wilkie Date: Sat, 18 Nov 2023 06:11:09 -0600 Subject: Initial commit. --- gmp-6.3.0/tests/mpz/t-divis.c | 166 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 gmp-6.3.0/tests/mpz/t-divis.c (limited to 'gmp-6.3.0/tests/mpz/t-divis.c') diff --git a/gmp-6.3.0/tests/mpz/t-divis.c b/gmp-6.3.0/tests/mpz/t-divis.c new file mode 100644 index 0000000..fe8186a --- /dev/null +++ b/gmp-6.3.0/tests/mpz/t-divis.c @@ -0,0 +1,166 @@ +/* test mpz_divisible_p and mpz_divisible_ui_p + +Copyright 2001, 2009 Free Software Foundation, Inc. + +This file is part of the GNU MP Library test suite. + +The GNU MP Library test suite is free software; you can redistribute it +and/or modify it under the terms of the GNU 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 test suite 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 General +Public License for more details. + +You should have received a copy of the GNU General Public License along with +the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */ + +#include +#include + +#include "gmp-impl.h" +#include "tests.h" + + +void +check_one (mpz_srcptr a, mpz_srcptr d, int want) +{ + int got; + + if (mpz_fits_ulong_p (d)) + { + unsigned long u = mpz_get_ui (d); + got = (mpz_divisible_ui_p (a, u) != 0); + if (want != got) + { + printf ("mpz_divisible_ui_p wrong\n"); + printf (" expected %d got %d\n", want, got); + mpz_trace (" a", a); + printf (" d=%lu\n", u); + mp_trace_base = -16; + mpz_trace (" a", a); + printf (" d=0x%lX\n", u); + abort (); + } + } + + got = (mpz_divisible_p (a, d) != 0); + if (want != got) + { + printf ("mpz_divisible_p wrong\n"); + printf (" expected %d got %d\n", want, got); + mpz_trace (" a", a); + mpz_trace (" d", d); + mp_trace_base = -16; + mpz_trace (" a", a); + mpz_trace (" d", d); + abort (); + } +} + +void +check_data (void) +{ + static const struct { + const char *a; + const char *d; + int want; + + } data[] = { + + { "0", "0", 1 }, + { "17", "0", 0 }, + { "0", "1", 1 }, + { "123", "1", 1 }, + { "-123", "1", 1 }, + + { "0", "2", 1 }, + { "1", "2", 0 }, + { "2", "2", 1 }, + { "-2", "2", 1 }, + { "0x100000000000000000000000000000000", "2", 1 }, + { "0x100000000000000000000000000000001", "2", 0 }, + + { "0x3333333333333333", "3", 1 }, + { "0x3333333333333332", "3", 0 }, + { "0x33333333333333333333333333333333", "3", 1 }, + { "0x33333333333333333333333333333332", "3", 0 }, + + /* divisor changes from 2 to 1 limb after stripping 2s */ + { "0x3333333300000000", "0x180000000", 1 }, + { "0x33333333333333330000000000000000", "0x18000000000000000", 1 }, + { "0x133333333333333330000000000000000", "0x18000000000000000", 0 }, + }; + + mpz_t a, d; + int i; + + mpz_init (a); + mpz_init (d); + + for (i = 0; i < numberof (data); i++) + { + mpz_set_str_or_abort (a, data[i].a, 0); + mpz_set_str_or_abort (d, data[i].d, 0); + check_one (a, d, data[i].want); + } + + mpz_clear (a); + mpz_clear (d); +} + +void +check_random (int reps) +{ + gmp_randstate_ptr rands = RANDS; + mpz_t a, d, r; + int i; + int want; + + mpz_init (a); + mpz_init (d); + mpz_init (r); + + for (i = 0; i < reps; i++) + { + mpz_erandomb (a, rands, 1 << 19); + mpz_erandomb_nonzero (d, rands, 1 << 18); + + mpz_fdiv_r (r, a, d); + + want = (mpz_sgn (r) == 0); + check_one (a, d, want); + + mpz_sub (a, a, r); + check_one (a, d, 1); + + if (mpz_cmpabs_ui (d, 1L) == 0) + continue; + + mpz_add_ui (a, a, 1L); + check_one (a, d, 0); + } + + mpz_clear (a); + mpz_clear (d); + mpz_clear (r); +} + + +int +main (int argc, char *argv[]) +{ + int reps = 100; + + tests_start (); + + TESTS_REPS (reps, argv, argc); + + check_data (); + check_random (reps); + + tests_end (); + exit (0); +} -- cgit v1.2.3