#ifndef _MATH_H
#define _MATH_H

#ifdef __cplusplus
extern "C" {
#endif

#ifndef LIBC_INLINE
# define LIBC_INLINE extern inline
#endif

	LIBC_INLINE double fabs(double val)
	{
		if(val < 0)
			return -val;
		return val;
	}
	
	LIBC_INLINE float fabsf(float val)
	{
		if(val < 0)
			return -val;
		return val;
	}

	double sin(double x) __attribute__((__const__));
	double cos(double x) __attribute__((__const__));
	double fmod(double x, double y) __attribute__((__const__));
	float fmodf(float x, float y) __attribute__((__const__));
	
	double pow(double x, double y) __attribute__((__const__));

	double sqrt(double x) __attribute__((__const__));

	double floor(double x) __attribute__((__const__));
	double ceil(double x) __attribute__((__const__));

// taken from glibc
# define M_E            2.7182818284590452354   /* e */
# define M_LOG2E        1.4426950408889634074   /* log_2 e */
# define M_LOG10E       0.43429448190325182765  /* log_10 e */
# define M_LN2          0.69314718055994530942  /* log_e 2 */
# define M_LN10         2.30258509299404568402  /* log_e 10 */
# define M_PI           3.14159265358979323846  /* pi */
# define M_PI_2         1.57079632679489661923  /* pi/2 */
# define M_PI_4         0.78539816339744830962  /* pi/4 */
# define M_1_PI         0.31830988618379067154  /* 1/pi */
# define M_2_PI         0.63661977236758134308  /* 2/pi */
# define M_2_SQRTPI     1.12837916709551257390  /* 2/sqrt(pi) */
# define M_SQRT2        1.41421356237309504880  /* sqrt(2) */
# define M_SQRT1_2      0.70710678118654752440  /* 1/sqrt(2) */

#ifdef __cplusplus
}
#endif

#endif