j0_y0.c File Reference

#include <math.h>
#include <float.h>
#include "ieee754/ieee754.h"

Include dependency graph for j0_y0.c:

Go to the source code of this file.

Functions
int *	_errno (void)
double	_j0 (double num)
double	_y0 (double num)

Function Documentation

_errno()

int * _errno

(

void

)

Definition at line 17 of file errno.c.

{
    return &(msvcrt_get_thread_data()->thread_errno);
}

Referenced by _j0(), and _y0().

_j0()

double _j0

(

double

num

)

Definition at line 10 of file j0_y0.c.

{
  if (!_finite(num)) *_errno() = EDOM;
  return __ieee754_j0(num);
}

_y0()

double _y0

(

double

num

)

Definition at line 19 of file j0_y0.c.

{
  double retval;
  int fpclass = _fpclass(num);
 
  if (!_finite(num) || fpclass == _FPCLASS_NN ||
      fpclass == _FPCLASS_ND || fpclass == _FPCLASS_NZ)
    *_errno() = EDOM;
 
  retval  = __ieee754_y0(num);
  if (_fpclass(retval) == _FPCLASS_NINF)
  {
    *_errno() = EDOM;
    retval = sqrt(-1);
  }
  return retval;
}