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/* Emulation for ceill.
Contributed by Paolo Bonzini
Copyright 2002, 2003 Free Software Foundation, Inc.
This file is part of gnulib.
This program 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, or (at your option)
any later version.
This program 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 this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <float.h>
#include "mathl.h"
/* To compute the integer part of X, sum a big enough
integer so that the precision of the floating point
number is exactly 1. */
long double
ceill(long double x)
{
long double y;
if (x < 0.0L)
y = -(1.0L / LDBL_EPSILON - x - 1.0 / LDBL_EPSILON);
else
y = 1.0L / LDBL_EPSILON + x - 1.0 / LDBL_EPSILON;
if (y < x)
return y + 1.0L;
else
return y;
}
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