mirror of
https://github.com/vale981/arb
synced 2025-03-06 01:41:39 -05:00
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/*=============================================================================
|
|
|
|
This file is part of ARB.
|
|
|
|
ARB is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ARB 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with ARB; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
=============================================================================*/
|
|
/******************************************************************************
|
|
|
|
Copyright (C) 2013 Fredrik Johansson
|
|
|
|
******************************************************************************/
|
|
|
|
#include "fmpr.h"
|
|
|
|
slong
|
|
fmpr_abs_bound_lt_2exp_si(const fmpr_t x)
|
|
{
|
|
if (fmpr_is_special(x))
|
|
{
|
|
if (fmpr_is_zero(x))
|
|
return -FMPR_PREC_EXACT;
|
|
else
|
|
return FMPR_PREC_EXACT;
|
|
}
|
|
else
|
|
{
|
|
slong res;
|
|
fmpz_t t;
|
|
fmpz_init(t);
|
|
fmpr_abs_bound_lt_2exp_fmpz(t, x);
|
|
|
|
if (fmpz_fits_si(t))
|
|
res = fmpz_get_si(t);
|
|
else
|
|
res = fmpz_sgn(t) < 0 ? -FMPR_PREC_EXACT : FMPR_PREC_EXACT;
|
|
|
|
fmpz_clear(t);
|
|
|
|
if (res < -FMPR_PREC_EXACT)
|
|
res = -FMPR_PREC_EXACT;
|
|
if (res > FMPR_PREC_EXACT)
|
|
res = FMPR_PREC_EXACT;
|
|
|
|
return res;
|
|
}
|
|
}
|
|
|