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/*
Copyright (C) 2011 Fredrik Johansson
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "fmpq.h"
void _fmpq_canonicalise(fmpz_t num, fmpz_t den)
{
fmpz_t u;
if (fmpz_is_one(den))
return;
if (fmpz_is_zero(num))
{
fmpz_one(den);
return;
}
fmpz_init(u);
fmpz_gcd(u, num, den);
if (!fmpz_is_one(u))
{
fmpz_divexact(num, num, u);
fmpz_divexact(den, den, u);
}
fmpz_clear(u);
if (fmpz_sgn(den) < 0)
{
fmpz_neg(num, num);
fmpz_neg(den, den);
}
}
void fmpq_canonicalise(fmpq_t res)
{
_fmpq_canonicalise(fmpq_numref(res), fmpq_denref(res));
}