| /* mpq_canonicalize(op) -- Remove common factors of the denominator and |
| numerator in OP. |
| |
| Copyright 1991, 1994, 1995, 1996, 2000, 2001, 2005 Free Software Foundation, |
| Inc. |
| |
| This file is part of the GNU MP Library. |
| |
| The GNU MP Library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser 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 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 Lesser General Public |
| License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ |
| |
| #include "gmp.h" |
| #include "gmp-impl.h" |
| |
| void |
| mpq_canonicalize (MP_RAT *op) |
| { |
| mpz_t gcd; |
| TMP_DECL; |
| |
| if (op->_mp_den._mp_size == 0) |
| DIVIDE_BY_ZERO; |
| |
| TMP_MARK; |
| |
| /* ??? Dunno if the 1+ is needed. */ |
| MPZ_TMP_INIT (gcd, 1 + MAX (ABS (op->_mp_num._mp_size), |
| ABS (op->_mp_den._mp_size))); |
| |
| mpz_gcd (gcd, &(op->_mp_num), &(op->_mp_den)); |
| if (! MPZ_EQUAL_1_P (gcd)) |
| { |
| mpz_divexact_gcd (&(op->_mp_num), &(op->_mp_num), gcd); |
| mpz_divexact_gcd (&(op->_mp_den), &(op->_mp_den), gcd); |
| } |
| |
| if (op->_mp_den._mp_size < 0) |
| { |
| op->_mp_num._mp_size = -op->_mp_num._mp_size; |
| op->_mp_den._mp_size = -op->_mp_den._mp_size; |
| } |
| TMP_FREE; |
| } |