missing/erf.c File Reference

#include "ruby/missing.h"
#include <stdio.h>
#include <math.h>
#include <float.h>

Go to the source code of this file.

Defines
#define	isinf(x)   (!_finite(x) && !_isnan(x))
#define	finite(x)   _finite(x)
#define	LOG_PI_OVER_2   0.572364942924700087071713675675
Functions
static double	q_gamma (double, double, double)
static double	p_gamma (double a, double x, double loggamma_a)
double	erf (double x)
double	erfc (double x)

---

Define Documentation

#define finite

(

x

)

_finite(x)

Definition at line 20 of file erf.c.

Referenced by erf(), erfc(), and flo_is_finite_p().

#define isinf

(

x

)

(!_finite(x) && !_isnan(x))

Definition at line 17 of file erf.c.

Referenced by atanh(), big_op(), BigMath_s_exp(), BigMath_s_log(), BSD_vfprintf(), c_valid_start_p(), c_virtual_sg(), dbl2big(), finite(), flo_cmp(), flo_is_finite_p(), flo_is_infinite_p(), flo_round(), flo_to_s(), float_denominator(), float_numerator(), float_value(), flodivmod(), generate_json_float(), guess_style(), m_julian_p(), m_proleptic_gregorian_p(), m_proleptic_julian_p(), math_atan2(), math_gamma(), math_lgamma(), nurat_div(), rand_range(), rb_big2dbl(), rb_big_cmp(), rb_big_eq(), rb_big_fdiv(), rb_str_format(), ruby_float_step(), ruby_hdtoa(), s_virtual_sg(), VpDtoV(), and w_float().

#define LOG_PI_OVER_2   0.572364942924700087071713675675

Definition at line 69 of file erf.c.

Referenced by erf(), and erfc().

---

Function Documentation

double erf

(

double

x

)

Definition at line 71 of file erf.c.

References finite, isnan, LOG_PI_OVER_2, and p_gamma().

Referenced by math_erf().

double erfc

(

double

x

)

Definition at line 81 of file erf.c.

References finite, isnan, LOG_PI_OVER_2, p_gamma(), and q_gamma().

Referenced by math_erfc().

static double p_gamma	(	double	a,
		double	x,
		double	loggamma_a
	)			[static]

Definition at line 29 of file erf.c.

References q_gamma(), result, and term.

Referenced by erf(), erfc(), and q_gamma().

static double q_gamma	(	double	a,
		double	x,
		double	loggamma_a
	)			[static]

Definition at line 48 of file erf.c.

References p_gamma(), and result.

Referenced by erfc(), and p_gamma().