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/* mpq_canonicalize(op) -- Remove common factors of the denominator and
numerator in OP.
Copyright 1991, 1994-1996, 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 https://www.gnu.org/licenses/. */
#include "gmp.h"
#include "gmp-impl.h"
void
mpq_canonicalize (mpq_t op)
{
mpz_t gcd;
TMP_DECL;
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)),
ABSIZ(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);
}
if (SIZ(DEN(op)) < 0)
{
SIZ(NUM(op)) = -SIZ(NUM(op));
SIZ(DEN(op)) = -SIZ(DEN(op));
}
TMP_FREE;
}
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