arb/acb/get_mag_lower.c

41 lines
947 B
C

/*
Copyright (C) 2014 Fredrik Johansson
This file is part of Arb.
Arb 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 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "acb.h"
void
acb_get_mag_lower(mag_t z, const acb_t x)
{
if (arb_is_zero(acb_imagref(x)))
{
arb_get_mag_lower(z, acb_realref(x));
}
else if (arb_is_zero(acb_realref(x)))
{
arb_get_mag_lower(z, acb_imagref(x));
}
else
{
mag_t t;
mag_init(t);
arb_get_mag_lower(t, acb_realref(x));
arb_get_mag_lower(z, acb_imagref(x));
mag_mul_lower(t, t, t);
mag_mul_lower(z, z, z);
mag_add_lower(z, z, t);
mag_sqrt_lower(z, z);
mag_clear(t);
}
}