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/* Test mpq_inv (and set/get_num/den).
Copyright 2012 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 "gmp-impl.h"
#include "tests.h"
int
main (int argc, char **argv)
{
mpq_t a, b;
mpz_t m, n;
const char* s = "-420000000000000000000000";
tests_start ();
mpq_inits (a, b, (mpq_ptr)0);
mpz_inits (m, n, (mpz_ptr)0);
mpz_set_ui (m, 13);
mpq_set_den (a, m);
mpz_set_str (m, s, 0);
mpq_set_num (a, m);
MPQ_CHECK_FORMAT (a);
mpq_inv (b, a);
MPQ_CHECK_FORMAT (b);
mpq_get_num (n, b);
ASSERT_ALWAYS (mpz_cmp_si (n, -13) == 0);
mpq_neg (b, b);
mpq_inv (a, b);
MPQ_CHECK_FORMAT (a);
mpq_inv (b, b);
MPQ_CHECK_FORMAT (b);
mpq_get_den (n, b);
ASSERT_ALWAYS (mpz_cmp_ui (n, 13) == 0);
mpq_get_num (n, a);
mpz_add (n, n, m);
ASSERT_ALWAYS (mpz_sgn (n) == 0);
mpq_clears (a, b, (mpq_ptr)0);
mpz_clears (m, n, (mpz_ptr)0);
tests_end ();
return 0;
}
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