1/* Test mpq_inv (and set/get_num/den).
2
3Copyright 2012 Free Software Foundation, Inc.
4
5This file is part of the GNU MP Library test suite.
6
7The GNU MP Library test suite is free software; you can redistribute it
8and/or modify it under the terms of the GNU General Public License as
9published by the Free Software Foundation; either version 3 of the License,
10or (at your option) any later version.
11
12The GNU MP Library test suite is distributed in the hope that it will be
13useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
15Public License for more details.
16
17You should have received a copy of the GNU General Public License along with
18the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */
19
20#include "gmp-impl.h"
21#include "tests.h"
22
23int
24main (int argc, char **argv)
25{
26  mpq_t a, b;
27  mpz_t m, n;
28  const char* s = "-420000000000000000000000";
29
30  tests_start ();
31
32  mpq_inits (a, b, (mpq_ptr)0);
33  mpz_inits (m, n, (mpz_ptr)0);
34
35  mpz_set_ui (m, 13);
36  mpq_set_den (a, m);
37  mpz_set_str (m, s, 0);
38  mpq_set_num (a, m);
39  MPQ_CHECK_FORMAT (a);
40  mpq_inv (b, a);
41  MPQ_CHECK_FORMAT (b);
42  mpq_get_num (n, b);
43  ASSERT_ALWAYS (mpz_cmp_si (n, -13) == 0);
44  mpq_neg (b, b);
45  mpq_inv (a, b);
46  MPQ_CHECK_FORMAT (a);
47  mpq_inv (b, b);
48  MPQ_CHECK_FORMAT (b);
49  mpq_get_den (n, b);
50  ASSERT_ALWAYS (mpz_cmp_ui (n, 13) == 0);
51  mpq_get_num (n, a);
52  mpz_add (n, n, m);
53  ASSERT_ALWAYS (mpz_sgn (n) == 0);
54
55  mpq_clears (a, b, (mpq_ptr)0);
56  mpz_clears (m, n, (mpz_ptr)0);
57
58  tests_end ();
59  return 0;
60}
61