1 files changed, 0 insertions, 89 deletions
diff --git a/ruby_1_9_3/missing/erf.c b/ruby_1_9_3/missing/erf.c
deleted file mode 100644
index d72c4eaf4e..0000000000
--- a/ruby_1_9_3/missing/erf.c
+++ /dev/null
@@ -1,89 +0,0 @@
-/* erf.c  - public domain implementation of error function erf(3m)
-
-reference - Haruhiko Okumura: C-gengo niyoru saishin algorithm jiten
-            (New Algorithm handbook in C language) (Gijyutsu hyouron
-            sha, Tokyo, 1991) p.227 [in Japanese]                 */
-#include "ruby/missing.h"
-#include <stdio.h>
-#include <math.h>
-
-#ifdef _WIN32
-# include <float.h>
-# if !defined __MINGW32__ || defined __NO_ISOCEXT
-#  ifndef isnan
-#   define isnan(x) _isnan(x)
-#  endif
-#  ifndef isinf
-#   define isinf(x) (!_finite(x) && !_isnan(x))
-#  endif
-#  ifndef finite
-#   define finite(x) _finite(x)
-#  endif
-# endif
-#endif
-
-static double q_gamma(double, double, double);
-
-/* Incomplete gamma function
-   1 / Gamma(a) * Int_0^x exp(-t) t^(a-1) dt  */
-static double p_gamma(double a, double x, double loggamma_a)
-{
-    int k;
-    double result, term, previous;
-
-    if (x >= 1 + a) return 1 - q_gamma(a, x, loggamma_a);
-    if (x == 0)     return 0;
-    result = term = exp(a * log(x) - x - loggamma_a) / a;
-    for (k = 1; k < 1000; k++) {
-        term *= x / (a + k);
-        previous = result;  result += term;
-        if (result == previous) return result;
-    }
-    fprintf(stderr, "erf.c:%d:p_gamma() could not converge.", __LINE__);
-    return result;
-}
-
-/* Incomplete gamma function
-   1 / Gamma(a) * Int_x^inf exp(-t) t^(a-1) dt  */
-static double q_gamma(double a, double x, double loggamma_a)
-{
-    int k;
-    double result, w, temp, previous;
-    double la = 1, lb = 1 + x - a;  /* Laguerre polynomial */
-
-    if (x < 1 + a) return 1 - p_gamma(a, x, loggamma_a);
-    w = exp(a * log(x) - x - loggamma_a);
-    result = w / lb;
-    for (k = 2; k < 1000; k++) {
-        temp = ((k - 1 - a) * (lb - la) + (k + x) * lb) / k;
-        la = lb;  lb = temp;
-        w *= (k - 1 - a) / k;
-        temp = w / (la * lb);
-        previous = result;  result += temp;
-        if (result == previous) return result;
-    }
-    fprintf(stderr, "erf.c:%d:q_gamma() could not converge.", __LINE__);
-    return result;
-}
-
-#define LOG_PI_OVER_2 0.572364942924700087071713675675 /* log_e(PI)/2 */
-
-double erf(double x)
-{
-    if (!finite(x)) {
-        if (isnan(x)) return x;      /* erf(NaN)   = NaN   */
-        return (x>0 ? 1.0 : -1.0);   /* erf(+-inf) = +-1.0 */
-    }
-    if (x >= 0) return   p_gamma(0.5, x * x, LOG_PI_OVER_2);
-    else        return - p_gamma(0.5, x * x, LOG_PI_OVER_2);
-}
-
-double erfc(double x)
-{
-    if (!finite(x)) {
-        if (isnan(x)) return x;      /* erfc(NaN)   = NaN      */
-        return (x>0 ? 0.0 : 2.0);    /* erfc(+-inf) = 0.0, 2.0 */
-    }
-    if (x >= 0) return  q_gamma(0.5, x * x, LOG_PI_OVER_2);
-    else        return  1 + p_gamma(0.5, x * x, LOG_PI_OVER_2);
-}