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/* GStreamer
* Copyright (C) 2010 Tim-Philipp Müller <tim centricular net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_MATH_COMPAT_H__
#define __GST_MATH_COMPAT_H__
/* This header is not included automatically via gst/gst.h, you need to
* include it explicitly if you need it. */
#ifndef _USE_MATH_DEFINES
#define _USE_MATH_DEFINES /* so MSVC defines M_PI etc. */
#endif
#include <math.h>
#include <glib.h>
G_BEGIN_DECLS
/* http://en.wikipedia.org/wiki/Math.h */
#define __GST_MATH_COMPAT_NEED_RINT
#define __GST_MATH_COMPAT_NEED_RINTF
#define __GST_MATH_COMPAT_NEED_ISNAN
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
#undef __GST_MATH_COMPAT_NEED_RINT
#undef __GST_MATH_COMPAT_NEED_RINTF
#undef __GST_MATH_COMPAT_NEED_ISNAN
#endif
#if defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L
#undef __GST_MATH_COMPAT_NEED_RINT
#undef __GST_MATH_COMPAT_NEED_RINTF
#undef __GST_MATH_COMPAT_NEED_ISNAN
#endif
#ifndef M_PI
#define M_PI G_PI
#endif
#ifndef M_PI_2
#define M_PI_2 G_PI_2
#endif
#ifndef M_PI_4
#define M_PI_4 G_PI_4
#endif
static inline double
__gst_math_compat_rint (double x)
{
return floor (x + 0.5);
}
static inline float
__gst_math_compat_rintf (float x)
{
return floorf (x + 0.5);
}
static inline gboolean
__gst_math_compat_isnan (double x)
{
return x != x;
}
#if defined (__GST_MATH_COMPAT_NEED_RINT) && !defined (rint)
#define rint(x) __gst_math_compat_rint(x)
#endif
#if defined (__GST_MATH_COMPAT_NEED_RINTF) && !defined (rintf)
#define rintf(x) __gst_math_compat_rintf(x)
#endif
#if defined (__GST_MATH_COMPAT_NEED_ISNAN) && !defined (isnan)
#define isnan(x) __gst_math_compat_isnan (x)
#endif
#ifndef NAN
#if G_BYTE_ORDER == G_BIG_ENDIAN
#define __GST_NAN_BYTES { 0x7f, 0xc0, 0, 0 }
#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
#define __GST_NAN_BYTES { 0, 0, 0xc0, 0x7f }
#endif
static union {
unsigned char __c[4];
float __d;
} __gst_nan_union G_GNUC_UNUSED = {
__GST_NAN_BYTES
};
#define NAN (__gst_nan_union.__d)
#endif
G_END_DECLS
#endif /* __GST_MATH_COMPAT_H__ */
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