1 /* mpq_canonicalize(op) -- Remove common factors of the denominator and
4 Copyright 1991, 1994, 1995, 1996, 2000, 2001, 2005 Free Software Foundation,
7 This file is part of the GNU MP Library.
9 The GNU MP Library is free software; you can redistribute it and/or modify
10 it under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or (at your
12 option) any later version.
14 The GNU MP Library is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17 License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
26 mpq_canonicalize (MP_RAT *op)
31 if (op->_mp_den._mp_size == 0)
36 /* ??? Dunno if the 1+ is needed. */
37 MPZ_TMP_INIT (gcd, 1 + MAX (ABS (op->_mp_num._mp_size),
38 ABS (op->_mp_den._mp_size)));
40 mpz_gcd (gcd, &(op->_mp_num), &(op->_mp_den));
41 if (! MPZ_EQUAL_1_P (gcd))
43 mpz_divexact_gcd (&(op->_mp_num), &(op->_mp_num), gcd);
44 mpz_divexact_gcd (&(op->_mp_den), &(op->_mp_den), gcd);
47 if (op->_mp_den._mp_size < 0)
49 op->_mp_num._mp_size = -op->_mp_num._mp_size;
50 op->_mp_den._mp_size = -op->_mp_den._mp_size;