1 /* 

     2  * GStreamer

     3  * Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>

     4  *

     5  * This library is free software; you can redistribute it and/or

     6  * modify it under the terms of the GNU Library General Public

     7  * License as published by the Free Software Foundation; either

     8  * version 2 of the License, or (at your option) any later version.

     9  *

    10  * This library is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13  * Library General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU Library General Public

    16  * License along with this library; if not, write to the

    17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    18  * Boston, MA 02111-1307, USA.

    19  */

    20 

    21 #ifndef __MATH_COMPAT_H__

    22 #define __MATH_COMPAT_H__

    23 

    24 #ifdef HAVE_CONFIG_H

    25 #include "config.h"

    26 #endif

    27 

    28 #include <glib.h>

    29 #include <math.h>

    30 

    31 #ifndef HAVE_ASINH

    32 static inline gdouble

    33 asinh (gdouble x)

    34 {

    35   return log(x + sqrt (x * x + 1));

    36 }

    37 #endif

    38 

    39 #ifndef HAVE_SINH

    40 static inline gdouble

    41 sinh (gdouble x)

    42 {

    43   return 0.5 * (exp (x) - exp (-x));

    44 }

    45 #endif

    46 

    47 #ifndef HAVE_COSH

    48 static inline gdouble

    49 cosh (gdouble x)

    50 {

    51   return 0.5 * (exp (x) + exp (-x));

    52 }

    53 #endif

    54 

    55 #endif /* __MATH_COMPAT_H__ */