admin/mruby-mruby
1
0
Fork 0
mirror of https://github.com/mruby/mruby synced 2026-06-08 16:11:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

removed lines the seem not to conform C99

Browse Source
This commit is contained in:
Yukihiro Matsumoto
2012-05-14 11:36:42 +09:00
parent 6b67801d4e
commit 628e60d6f3
1 changed files with 0 additions and 168 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/math.c
-168
View File
@@ -5,32 +5,8 @@
*/
#include "mruby.h"
#include <math.h>
#if defined(__FreeBSD__) && __FreeBSD__ < 4
#include <floatingpoint.h>
#endif
#ifdef HAVE_FLOAT_H
#include <float.h>
#endif
#ifdef HAVE_IEEEFP_H
#include <ieeefp.h>
#endif
#define SIGNED_VALUE intptr_t
#ifdef MRB_USE_FLOAT
#define floor(f) floorf(f)
#define ceil(f) ceilf(f)
#define floor(f) floorf(f)
#define fmod(x,y) fmodf(x,y)
#endif
#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))
#define domain_error(msg) \
mrb_raise(mrb, E_RANGE_ERROR, "Numerical argument is out of domain - " #msg);
@@ -185,22 +161,6 @@ math_atan2(mrb_state *mrb, mrb_value obj)
/*
HYPERBOLIC TRIG FUNCTIONS
*/
#ifndef HAVE_SINH
double
sinh(double x)
{
return (exp(x) - exp(-x)) / 2;
}
#endif
#ifndef HAVE_TANH
double
tanh(double x)
{
return sinh(x) / cosh(x);
}
#endif
/*
* call-seq:
* Math.sinh(x) -> float
@@ -568,131 +528,6 @@ math_erfc(mrb_state *mrb, mrb_value obj)
return mrb_float_value(x);
}
/*
* call-seq:
* Math.gamma(x) -> float
*
* Calculates the gamma function of x.
*
* Note that gamma(n) is same as fact(n-1) for integer n > 0.
* However gamma(n) returns float and can be an approximation.
*
* def fact(n) (1..n).inject(1) {|r,i| r*i } end
* 1.upto(26) {|i| p [i, Math.gamma(i), fact(i-1)] }
* #=> [1, 1.0, 1]
* # [2, 1.0, 1]
* # [3, 2.0, 2]
* # [4, 6.0, 6]
* # [5, 24.0, 24]
* # [6, 120.0, 120]
* # [7, 720.0, 720]
* # [8, 5040.0, 5040]
* # [9, 40320.0, 40320]
* # [10, 362880.0, 362880]
* # [11, 3628800.0, 3628800]
* # [12, 39916800.0, 39916800]
* # [13, 479001600.0, 479001600]
* # [14, 6227020800.0, 6227020800]
* # [15, 87178291200.0, 87178291200]
* # [16, 1307674368000.0, 1307674368000]
* # [17, 20922789888000.0, 20922789888000]
* # [18, 355687428096000.0, 355687428096000]
* # [19, 6.402373705728e+15, 6402373705728000]
* # [20, 1.21645100408832e+17, 121645100408832000]
* # [21, 2.43290200817664e+18, 2432902008176640000]
* # [22, 5.109094217170944e+19, 51090942171709440000]
* # [23, 1.1240007277776077e+21, 1124000727777607680000]
* # [24, 2.5852016738885062e+22, 25852016738884976640000]
* # [25, 6.204484017332391e+23, 620448401733239439360000]
* # [26, 1.5511210043330954e+25, 15511210043330985984000000]
*
*/
static mrb_value
math_gamma(mrb_state *mrb, mrb_value obj)
{
static const double fact_table[] = {
/* fact(0) */ 1.0,
/* fact(1) */ 1.0,
/* fact(2) */ 2.0,
/* fact(3) */ 6.0,
/* fact(4) */ 24.0,
/* fact(5) */ 120.0,
/* fact(6) */ 720.0,
/* fact(7) */ 5040.0,
/* fact(8) */ 40320.0,
/* fact(9) */ 362880.0,
/* fact(10) */ 3628800.0,
/* fact(11) */ 39916800.0,
/* fact(12) */ 479001600.0,
/* fact(13) */ 6227020800.0,
/* fact(14) */ 87178291200.0,
/* fact(15) */ 1307674368000.0,
/* fact(16) */ 20922789888000.0,
/* fact(17) */ 355687428096000.0,
/* fact(18) */ 6402373705728000.0,
/* fact(19) */ 121645100408832000.0,
/* fact(20) */ 2432902008176640000.0,
/* fact(21) */ 51090942171709440000.0,
/* fact(22) */ 1124000727777607680000.0,
/* fact(23)=25852016738884976640000 needs 56bit mantissa which is
* impossible to represent exactly in IEEE 754 double which have
* 53bit mantissa. */
};
double intpart, fracpart;
mrb_float x;
mrb_get_args(mrb, "f", &x);
/* check for domain error */
if (isinf(x) && signbit(x)) domain_error("gamma");
fracpart = modf(x, &intpart);
if (fracpart == 0.0) {
if (intpart < 0) domain_error("gamma");
if (0 < intpart &&
intpart - 1 < (double)numberof(fact_table)) {
return mrb_float_value(fact_table[(int)intpart - 1]);
}
}
return mrb_float_value(tgamma(x));
}
/*
* call-seq:
* Math.lgamma(x) -> [float, -1 or 1]
*
* Calculates the logarithmic gamma of x and
* the sign of gamma of x.
*
* Math.lgamma(x) is same as
* [Math.log(Math.gamma(x).abs), Math.gamma(x) < 0 ? -1 : 1]
* but avoid overflow by Math.gamma(x) for large x.
*/
/* TODO: lgamma_r() is missing */
/*
static mrb_value
math_lgamma(mrb_state *mrb, mrb_value obj)
{
double d0, d;
int sign=1;
mrb_float x;
mrb_get_args(mrb, "f", &x);
// check for domain error
if (isinf(x)) {
if (signbit(x)) domain_error("lgamma");
return rb_assoc_new(mrb_float_value(INFINITY), mrb_fixnum_value(1));
}
d = lgamma_r(x, &sign);
return mrb_assoc_new(mrb, mrb_float_value(d), mrb_fixnum_value(sign));
}
*/
/* ------------------------------------------------------------------------*/
void
mrb_init_math(mrb_state *mrb)
@@ -742,7 +577,4 @@ mrb_init_math(mrb_state *mrb)
mrb_define_class_method(mrb, mrb_math, "erf", math_erf, 1);
mrb_define_class_method(mrb, mrb_math, "erfc", math_erfc, 1);
mrb_define_class_method(mrb, mrb_math, "gamma", math_gamma, 1);
/* mrb_define_class_method(mrb, mrb_math, "lgamma", math_lgamma, 1); */
}