зеркало из https://github.com/github/ruby.git
341 строка
6.0 KiB
C
341 строка
6.0 KiB
C
/**********************************************************************
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math.c -
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$Author$
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$Date$
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created at: Tue Jan 25 14:12:56 JST 1994
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Copyright (C) 1993-2003 Yukihiro Matsumoto
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**********************************************************************/
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#include "ruby.h"
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#include <math.h>
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#include <errno.h>
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VALUE rb_mMath;
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#define Need_Float(x) (x) = rb_Float(x)
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#define Need_Float2(x,y) do {\
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Need_Float(x);\
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Need_Float(y);\
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} while (0)
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static VALUE
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math_atan2(obj, y, x)
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VALUE obj, x, y;
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{
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Need_Float2(y, x);
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return rb_float_new(atan2(RFLOAT(y)->value, RFLOAT(x)->value));
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}
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static VALUE
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math_cos(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(cos(RFLOAT(x)->value));
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}
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static VALUE
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math_sin(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(sin(RFLOAT(x)->value));
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}
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static VALUE
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math_tan(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(tan(RFLOAT(x)->value));
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}
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static VALUE
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math_acos(obj, x)
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VALUE obj, x;
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{
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double d;
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Need_Float(x);
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errno = 0;
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d = acos(RFLOAT(x)->value);
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if (errno) {
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rb_sys_fail("acos");
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}
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return rb_float_new(d);
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}
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static VALUE
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math_asin(obj, x)
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VALUE obj, x;
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{
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double d;
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Need_Float(x);
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errno = 0;
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d = asin(RFLOAT(x)->value);
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if (errno) {
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rb_sys_fail("asin");
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}
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return rb_float_new(d);
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}
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static VALUE
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math_atan(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(atan(RFLOAT(x)->value));
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}
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#ifndef HAVE_COSH
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double
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cosh(x)
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double x;
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{
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return (exp(x) + exp(-x)) / 2;
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}
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#endif
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static VALUE
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math_cosh(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(cosh(RFLOAT(x)->value));
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}
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#ifndef HAVE_SINH
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double
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sinh(x)
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double x;
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{
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return (exp(x) - exp(-x)) / 2;
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}
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#endif
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static VALUE
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math_sinh(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(sinh(RFLOAT(x)->value));
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}
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#ifndef HAVE_TANH
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double
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tanh(x)
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double x;
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{
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return sinh(x) / cosh(x);
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}
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#endif
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static VALUE
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math_tanh(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(tanh(RFLOAT(x)->value));
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}
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static VALUE
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math_acosh(obj, x)
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VALUE obj, x;
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{
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double d;
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Need_Float(x);
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errno = 0;
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d = acosh(RFLOAT(x)->value);
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if (errno) {
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rb_sys_fail("acosh");
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}
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return rb_float_new(d);
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}
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static VALUE
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math_asinh(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(asinh(RFLOAT(x)->value));
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}
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static VALUE
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math_atanh(obj, x)
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VALUE obj, x;
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{
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double d;
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Need_Float(x);
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errno = 0;
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d = atanh(RFLOAT(x)->value);
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if (errno) {
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rb_sys_fail("atanh");
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}
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return rb_float_new(d);
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}
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static VALUE
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math_exp(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(exp(RFLOAT(x)->value));
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}
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#if defined __CYGWIN__
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# include <cygwin/version.h>
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# if CYGWIN_VERSION_DLL_MAJOR < 1005
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# define nan(x) nan()
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# endif
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# define log(x) ((x) < 0.0 ? nan("") : log(x))
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# define log10(x) ((x) < 0.0 ? nan("") : log10(x))
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#endif
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static VALUE
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math_log(obj, x)
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VALUE obj, x;
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{
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double d;
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Need_Float(x);
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errno = 0;
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d = log(RFLOAT(x)->value);
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if (errno) {
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rb_sys_fail("log");
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}
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return rb_float_new(d);
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}
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static VALUE
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math_log10(obj, x)
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VALUE obj, x;
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{
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double d;
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Need_Float(x);
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errno = 0;
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d = log10(RFLOAT(x)->value);
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if (errno) {
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rb_sys_fail("log10");
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}
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return rb_float_new(d);
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}
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static VALUE
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math_sqrt(obj, x)
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VALUE obj, x;
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{
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double d;
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Need_Float(x);
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errno = 0;
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d = sqrt(RFLOAT(x)->value);
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if (errno) {
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rb_sys_fail("sqrt");
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}
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return rb_float_new(d);
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}
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static VALUE
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math_frexp(obj, x)
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VALUE obj, x;
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{
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double d;
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int exp;
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Need_Float(x);
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d = frexp(RFLOAT(x)->value, &exp);
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return rb_assoc_new(rb_float_new(d), INT2NUM(exp));
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}
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static VALUE
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math_ldexp(obj, x, n)
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VALUE obj, x, n;
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{
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Need_Float(x);
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return rb_float_new(ldexp(RFLOAT(x)->value, NUM2INT(n)));
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}
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static VALUE
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math_hypot(obj, x, y)
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VALUE obj, x, y;
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{
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Need_Float2(x, y);
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return rb_float_new(hypot(RFLOAT(x)->value, RFLOAT(y)->value));
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}
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static VALUE
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math_erf(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(erf(RFLOAT(x)->value));
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}
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static VALUE
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math_erfc(obj, x)
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VALUE obj, x;
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{
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Need_Float(x);
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return rb_float_new(erfc(RFLOAT(x)->value));
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}
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void
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Init_Math()
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{
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rb_mMath = rb_define_module("Math");
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#ifdef M_PI
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rb_define_const(rb_mMath, "PI", rb_float_new(M_PI));
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#else
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rb_define_const(rb_mMath, "PI", rb_float_new(atan(1.0)*4.0));
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#endif
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#ifdef M_E
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rb_define_const(rb_mMath, "E", rb_float_new(M_E));
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#else
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rb_define_const(rb_mMath, "E", rb_float_new(exp(1.0)));
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#endif
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rb_define_module_function(rb_mMath, "atan2", math_atan2, 2);
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rb_define_module_function(rb_mMath, "cos", math_cos, 1);
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rb_define_module_function(rb_mMath, "sin", math_sin, 1);
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rb_define_module_function(rb_mMath, "tan", math_tan, 1);
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rb_define_module_function(rb_mMath, "acos", math_acos, 1);
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rb_define_module_function(rb_mMath, "asin", math_asin, 1);
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rb_define_module_function(rb_mMath, "atan", math_atan, 1);
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rb_define_module_function(rb_mMath, "cosh", math_cosh, 1);
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rb_define_module_function(rb_mMath, "sinh", math_sinh, 1);
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rb_define_module_function(rb_mMath, "tanh", math_tanh, 1);
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rb_define_module_function(rb_mMath, "acosh", math_acosh, 1);
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rb_define_module_function(rb_mMath, "asinh", math_asinh, 1);
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rb_define_module_function(rb_mMath, "atanh", math_atanh, 1);
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rb_define_module_function(rb_mMath, "exp", math_exp, 1);
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rb_define_module_function(rb_mMath, "log", math_log, 1);
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rb_define_module_function(rb_mMath, "log10", math_log10, 1);
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rb_define_module_function(rb_mMath, "sqrt", math_sqrt, 1);
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rb_define_module_function(rb_mMath, "frexp", math_frexp, 1);
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rb_define_module_function(rb_mMath, "ldexp", math_ldexp, 2);
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rb_define_module_function(rb_mMath, "hypot", math_hypot, 2);
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rb_define_module_function(rb_mMath, "erf", math_erf, 1);
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rb_define_module_function(rb_mMath, "erfc", math_erfc, 1);
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}
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