1 /* mpq_canonicalize(op) -- Remove common factors of the denominator and
4 Copyright (C) 1991, 1994, 1995, 1996 Free Software Foundation, Inc.
6 This file is part of the GNU MP Library.
8 The GNU MP Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Library General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or (at your
11 option) any later version.
13 The GNU MP Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
16 License for more details.
18 You should have received a copy of the GNU Library General Public License
19 along with the GNU MP Library; see the file COPYING.LIB. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21 MA 02111-1307, USA. */
28 mpq_canonicalize (MP_RAT *op)
39 /* ??? Dunno if the 1+ is needed. */
40 MPZ_TMP_INIT (gcd, 1 + MAX (ABS (op->_mp_num._mp_size),
41 ABS (op->_mp_den._mp_size)));
43 mpz_gcd (gcd, &(op->_mp_num), &(op->_mp_den));
44 mpz_divexact (&(op->_mp_num), &(op->_mp_num), gcd);
45 mpz_divexact (&(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;