mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 16:21:07 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* Round double value to long int.
|
|
Copyright (C) 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <math.h>
|
|
|
|
/* I think that what this routine is supposed to do is round a value
|
|
to the nearest integer, with values exactly on the boundary rounded
|
|
away from zero. */
|
|
/* This routine relies on (long int)x, when x is out of range of a long int,
|
|
clipping to MAX_LONG or MIN_LONG. */
|
|
|
|
long int
|
|
__lround (double x)
|
|
{
|
|
double xrf;
|
|
long int xr;
|
|
xr = (long int) x;
|
|
xrf = (double) xr;
|
|
if (x >= 0.0)
|
|
if (x - xrf >= 0.5 && x - xrf < 1.0 && x+1 > 0)
|
|
return x+1;
|
|
else
|
|
return x;
|
|
else
|
|
if (xrf - x >= 0.5 && xrf - x < 1.0 && x-1 < 0)
|
|
return x-1;
|
|
else
|
|
return x;
|
|
}
|
|
weak_alias (__lround, lround)
|
|
#ifdef NO_LONG_DOUBLE
|
|
strong_alias (__lround, __lroundl)
|
|
weak_alias (__lround, lroundl)
|
|
#endif
|