#include <math.h>
#include <stdlib.h>
#include <limits.h>

#define PI	3.1415926
#define PID2	(PI/2)

#define TWOPI   (2*PI)
#define LOGE    0.43429448190325183 
#define LN10    2.3025850929940457

#define LOG10_2 0.3010299956639812      /* log10(2) */
#define LOG2_10 3.3219280948873623      /* log2(10) */


float _nan(void);