Ruby  2.0.0p247(2013-06-27revision41674)
Macros | Functions
tgamma.c File Reference
#include "ruby/config.h"
#include <math.h>
#include <errno.h>

Go to the source code of this file.

Macros

#define PI   3.14159265358979324 /* $\pi$ */
 
#define LOG_2PI   1.83787706640934548 /* $\log 2\pi$ */
 
#define N   8
 
#define B0   1 /* Bernoulli numbers */
 
#define B1   (-1.0 / 2.0)
 
#define B2   ( 1.0 / 6.0)
 
#define B4   (-1.0 / 30.0)
 
#define B6   ( 1.0 / 42.0)
 
#define B8   (-1.0 / 30.0)
 
#define B10   ( 5.0 / 66.0)
 
#define B12   (-691.0 / 2730.0)
 
#define B14   ( 7.0 / 6.0)
 
#define B16   (-3617.0 / 510.0)
 

Functions

static double loggamma (double x)
 
double tgamma (double x)
 

Macro Definition Documentation

#define B0   1 /* Bernoulli numbers */

Definition at line 46 of file tgamma.c.

#define B1   (-1.0 / 2.0)

Definition at line 47 of file tgamma.c.

#define B10   ( 5.0 / 66.0)

Definition at line 52 of file tgamma.c.

Referenced by loggamma().

#define B12   (-691.0 / 2730.0)

Definition at line 53 of file tgamma.c.

Referenced by loggamma().

#define B14   ( 7.0 / 6.0)

Definition at line 54 of file tgamma.c.

Referenced by loggamma().

#define B16   (-3617.0 / 510.0)

Definition at line 55 of file tgamma.c.

Referenced by loggamma().

#define B2   ( 1.0 / 6.0)

Definition at line 48 of file tgamma.c.

Referenced by loggamma().

#define B4   (-1.0 / 30.0)

Definition at line 49 of file tgamma.c.

Referenced by loggamma().

#define B6   ( 1.0 / 42.0)

Definition at line 50 of file tgamma.c.

Referenced by loggamma().

#define B8   (-1.0 / 30.0)

Definition at line 51 of file tgamma.c.

Referenced by loggamma().

#define LOG_2PI   1.83787706640934548 /* $\log 2\pi$ */

Definition at line 43 of file tgamma.c.

Referenced by loggamma().

#define N   8

Definition at line 44 of file tgamma.c.

Referenced by loggamma().

#define PI   3.14159265358979324 /* $\pi$ */

Definition at line 42 of file tgamma.c.

Referenced by tgamma().

Function Documentation

static double loggamma ( double  x)
static

Definition at line 58 of file tgamma.c.

References B10, B12, B14, B16, B2, B4, B6, B8, LOG_2PI, N, and v.

Referenced by tgamma().

double tgamma ( double  x)

Definition at line 72 of file tgamma.c.

References errno, f, i, loggamma(), PI, and zero().

Referenced by math_gamma().