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/*
Copyright (C) 2020 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 "qqbar.h"
void
qqbar_sgn(qqbar_t res, const qqbar_t x)
{
int re, im;
re = qqbar_sgn_re(x);
im = qqbar_sgn_im(x);
if (im == 0)
{
qqbar_set_si(res, re);
}
else if (re == 0)
{
qqbar_i(res);
if (im < 0)
qqbar_neg(res, res);
}
else
{
qqbar_t t;
qqbar_init(t);
qqbar_abs(t, x);
qqbar_div(res, x, t);
qqbar_clear(t);
}
}