From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001 From: Duncan Wilkie Date: Sat, 18 Nov 2023 06:11:09 -0600 Subject: Initial commit. --- gmp-6.3.0/mpq/canonicalize.c | 61 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 gmp-6.3.0/mpq/canonicalize.c (limited to 'gmp-6.3.0/mpq/canonicalize.c') diff --git a/gmp-6.3.0/mpq/canonicalize.c b/gmp-6.3.0/mpq/canonicalize.c new file mode 100644 index 0000000..7ac2331 --- /dev/null +++ b/gmp-6.3.0/mpq/canonicalize.c @@ -0,0 +1,61 @@ +/* mpq_canonicalize(op) -- Remove common factors of the denominator and + numerator in OP. + +Copyright 1991, 1994-1996, 2000, 2001, 2005, 2014 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 either: + + * 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. + +or + + * the GNU General Public License as published by the Free Software + Foundation; either version 2 of the License, or (at your option) any + later version. + +or both in parallel, as here. + +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 General Public License +for more details. + +You should have received copies of the GNU General Public License and the +GNU Lesser General Public License along with the GNU MP Library. If not, +see https://www.gnu.org/licenses/. */ + +#include "gmp-impl.h" + +void +mpq_canonicalize (mpq_ptr op) +{ + mpz_t gcd; + TMP_DECL; + + if (SIZ(DEN(op)) < 0) + { + SIZ(NUM(op)) = -SIZ(NUM(op)); + SIZ(DEN(op)) = -SIZ(DEN(op)); + } + else if (UNLIKELY (SIZ(DEN(op)) == 0)) + DIVIDE_BY_ZERO; + + TMP_MARK; + + /* ??? Dunno if the 1+ is needed. */ + MPZ_TMP_INIT (gcd, 1 + MAX (ABSIZ(NUM(op)), + SIZ(DEN(op)))); + + mpz_gcd (gcd, NUM(op), DEN(op)); + if (! MPZ_EQUAL_1_P (gcd)) + { + mpz_divexact_gcd (NUM(op), NUM(op), gcd); + mpz_divexact_gcd (DEN(op), DEN(op), gcd); + } + TMP_FREE; +} -- cgit v1.2.3