mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-11-15 05:00:09 +00:00
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/* GTK - The GIMP Toolkit
|
|
* Copyright (C) 2011 Chun-wei Fan <fanc999@yahoo.com.tw>
|
|
*
|
|
* Author: Chun-wei Fan <fanc999@yahoo.com.tw>
|
|
*
|
|
* This 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 of the License, or (at your option) any later version.
|
|
*
|
|
* This 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 this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <float.h>
|
|
|
|
#ifndef HAVE_DECL_ISNAN
|
|
/* it seems of the supported compilers only
|
|
* MSVC does not have isnan(), but it does
|
|
* have _isnan() which does the same as isnan()
|
|
*/
|
|
static inline gboolean
|
|
isnan (double x)
|
|
{
|
|
return _isnan (x);
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_DECL_ISINF
|
|
/* Unfortunately MSVC does not have finite()
|
|
* but it does have _finite() which is the same
|
|
* as finite() except when x is a NaN
|
|
*/
|
|
static inline gboolean
|
|
isinf (double x)
|
|
{
|
|
return (!_finite (x) && !_isnan (x));
|
|
}
|
|
#endif
|
|
|
|
/* Workaround for round() for non-GCC/non-C99 compilers */
|
|
#ifndef HAVE_ROUND
|
|
static inline double
|
|
round (double x)
|
|
{
|
|
if (x >= 0)
|
|
return floor (x + 0.5);
|
|
else
|
|
return ceil (x - 0.5);
|
|
}
|
|
#endif
|