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/*
Copyright (C) 2014 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 "arf.h"
slong
arf_abs_bound_lt_2exp_si(const arf_t x)
{
slong res;
if (arf_is_special(x))
{
if (arf_is_zero(x))
return -ARF_PREC_EXACT;
else
return ARF_PREC_EXACT;
}
if (!COEFF_IS_MPZ(ARF_EXP(x)))
return ARF_EXP(x);
if (fmpz_fits_si(ARF_EXPREF(x)))
res = fmpz_get_si(ARF_EXPREF(x));
else
res = fmpz_sgn(ARF_EXPREF(x)) < 0 ? -ARF_PREC_EXACT : ARF_PREC_EXACT;
if (res < -ARF_PREC_EXACT)
res = -ARF_PREC_EXACT;
if (res > ARF_PREC_EXACT)
res = ARF_PREC_EXACT;
return res;
}