mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
44 lines
1 KiB
C
44 lines
1 KiB
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 "arf.h"
|
|
|
|
void
|
|
arf_ceil(arf_t z, const arf_t x)
|
|
{
|
|
if (arf_is_special(x) || arf_is_int(x))
|
|
{
|
|
arf_set(z, x);
|
|
}
|
|
else
|
|
{
|
|
slong exp = ARF_EXP(x);
|
|
|
|
/* now exp cannot be too large, as we would have
|
|
caught this in arf_is_int() */
|
|
if (COEFF_IS_MPZ(exp) || exp <= 0)
|
|
{
|
|
if (ARF_SGNBIT(x))
|
|
arf_zero(z);
|
|
else
|
|
arf_one(z);
|
|
}
|
|
else if (exp == 1)
|
|
{
|
|
arf_set_si(z, ARF_SGNBIT(x) ? -1 : 2);
|
|
}
|
|
else
|
|
{
|
|
arf_set_round(z, x, exp, ARF_RND_CEIL);
|
|
}
|
|
}
|
|
}
|
|
|