diff options
Diffstat (limited to 'ruby_1_8_6/math.c')
-rw-r--r-- | ruby_1_8_6/math.c | 529 |
1 files changed, 0 insertions, 529 deletions
diff --git a/ruby_1_8_6/math.c b/ruby_1_8_6/math.c deleted file mode 100644 index cf78fc4f2a..0000000000 --- a/ruby_1_8_6/math.c +++ /dev/null @@ -1,529 +0,0 @@ -/********************************************************************** - - math.c - - - $Author$ - $Date$ - created at: Tue Jan 25 14:12:56 JST 1994 - - Copyright (C) 1993-2003 Yukihiro Matsumoto - -**********************************************************************/ - -#include "ruby.h" -#include <math.h> -#include <errno.h> - -VALUE rb_mMath; - -#define Need_Float(x) (x) = rb_Float(x) -#define Need_Float2(x,y) do {\ - Need_Float(x);\ - Need_Float(y);\ -} while (0) - -static void -domain_check(x, msg) - double x; - char *msg; -{ - while(1) { - if (errno) { - rb_sys_fail(msg); - } - if (isnan(x)) { -#if defined(EDOM) - errno = EDOM; -#elif defined(ERANGE) - errno = ERANGE; -#endif - continue; - } - break; - } -} - - -/* - * call-seq: - * Math.atan2(y, x) => float - * - * Computes the arc tangent given <i>y</i> and <i>x</i>. Returns - * -PI..PI. - * - */ - -static VALUE -math_atan2(obj, y, x) - VALUE obj, x, y; -{ - Need_Float2(y, x); - return rb_float_new(atan2(RFLOAT(y)->value, RFLOAT(x)->value)); -} - - -/* - * call-seq: - * Math.cos(x) => float - * - * Computes the cosine of <i>x</i> (expressed in radians). Returns - * -1..1. - */ - -static VALUE -math_cos(obj, x) - VALUE obj, x; -{ - Need_Float(x); - return rb_float_new(cos(RFLOAT(x)->value)); -} - -/* - * call-seq: - * Math.sin(x) => float - * - * Computes the sine of <i>x</i> (expressed in radians). Returns - * -1..1. - */ - -static VALUE -math_sin(obj, x) - VALUE obj, x; -{ - Need_Float(x); - - return rb_float_new(sin(RFLOAT(x)->value)); -} - - -/* - * call-seq: - * Math.tan(x) => float - * - * Returns the tangent of <i>x</i> (expressed in radians). - */ - -static VALUE -math_tan(obj, x) - VALUE obj, x; -{ - Need_Float(x); - - return rb_float_new(tan(RFLOAT(x)->value)); -} - -/* - * call-seq: - * Math.acos(x) => float - * - * Computes the arc cosine of <i>x</i>. Returns 0..PI. - */ - -static VALUE -math_acos(obj, x) - VALUE obj, x; -{ - double d; - - Need_Float(x); - errno = 0; - d = acos(RFLOAT(x)->value); - domain_check(d, "acos"); - return rb_float_new(d); -} - -/* - * call-seq: - * Math.asin(x) => float - * - * Computes the arc sine of <i>x</i>. Returns 0..PI. - */ - -static VALUE -math_asin(obj, x) - VALUE obj, x; -{ - double d; - - Need_Float(x); - errno = 0; - d = asin(RFLOAT(x)->value); - domain_check(d, "asin"); - return rb_float_new(d); -} - -/* - * call-seq: - * Math.atan(x) => float - * - * Computes the arc tangent of <i>x</i>. Returns -{PI/2} .. {PI/2}. - */ - -static VALUE -math_atan(obj, x) - VALUE obj, x; -{ - Need_Float(x); - return rb_float_new(atan(RFLOAT(x)->value)); -} - -#ifndef HAVE_COSH -double -cosh(x) - double x; -{ - return (exp(x) + exp(-x)) / 2; -} -#endif - -/* - * call-seq: - * Math.cosh(x) => float - * - * Computes the hyperbolic cosine of <i>x</i> (expressed in radians). - */ - -static VALUE -math_cosh(obj, x) - VALUE obj, x; -{ - Need_Float(x); - - return rb_float_new(cosh(RFLOAT(x)->value)); -} - -#ifndef HAVE_SINH -double -sinh(x) - double x; -{ - return (exp(x) - exp(-x)) / 2; -} -#endif - -/* - * call-seq: - * Math.sinh(x) => float - * - * Computes the hyperbolic sine of <i>x</i> (expressed in - * radians). - */ - -static VALUE -math_sinh(obj, x) - VALUE obj, x; -{ - Need_Float(x); - return rb_float_new(sinh(RFLOAT(x)->value)); -} - -#ifndef HAVE_TANH -double -tanh(x) - double x; -{ - return sinh(x) / cosh(x); -} -#endif - -/* - * call-seq: - * Math.tanh() => float - * - * Computes the hyperbolic tangent of <i>x</i> (expressed in - * radians). - */ - -static VALUE -math_tanh(obj, x) - VALUE obj, x; -{ - Need_Float(x); - return rb_float_new(tanh(RFLOAT(x)->value)); -} - -/* - * call-seq: - * Math.acosh(x) => float - * - * Computes the inverse hyperbolic cosine of <i>x</i>. - */ - -static VALUE -math_acosh(obj, x) - VALUE obj, x; -{ - double d; - - Need_Float(x); - errno = 0; - d = acosh(RFLOAT(x)->value); - domain_check(d, "acosh"); - return rb_float_new(d); -} - -/* - * call-seq: - * Math.asinh(x) => float - * - * Computes the inverse hyperbolic sine of <i>x</i>. - */ - -static VALUE -math_asinh(obj, x) - VALUE obj, x; -{ - Need_Float(x); - return rb_float_new(asinh(RFLOAT(x)->value)); -} - -/* - * call-seq: - * Math.atanh(x) => float - * - * Computes the inverse hyperbolic tangent of <i>x</i>. - */ - -static VALUE -math_atanh(obj, x) - VALUE obj, x; -{ - double d; - - Need_Float(x); - errno = 0; - d = atanh(RFLOAT(x)->value); - domain_check(d, "atanh"); - return rb_float_new(d); -} - -/* - * call-seq: - * Math.exp(x) => float - * - * Returns e**x. - */ - -static VALUE -math_exp(obj, x) - VALUE obj, x; -{ - Need_Float(x); - return rb_float_new(exp(RFLOAT(x)->value)); -} - -#if defined __CYGWIN__ -# include <cygwin/version.h> -# if CYGWIN_VERSION_DLL_MAJOR < 1005 -# define nan(x) nan() -# endif -# define log(x) ((x) < 0.0 ? nan("") : log(x)) -# define log10(x) ((x) < 0.0 ? nan("") : log10(x)) -#endif - -/* - * call-seq: - * Math.log(numeric) => float - * - * Returns the natural logarithm of <i>numeric</i>. - */ - -static VALUE -math_log(obj, x) - VALUE obj, x; -{ - double d; - - Need_Float(x); - errno = 0; - d = log(RFLOAT(x)->value); - domain_check(d, "log"); - return rb_float_new(d); -} - -/* - * call-seq: - * Math.log10(numeric) => float - * - * Returns the base 10 logarithm of <i>numeric</i>. - */ - -static VALUE -math_log10(obj, x) - VALUE obj, x; -{ - double d; - - Need_Float(x); - errno = 0; - d = log10(RFLOAT(x)->value); - domain_check(d, "log10"); - return rb_float_new(d); -} - -/* - * call-seq: - * Math.sqrt(numeric) => float - * - * Returns the non-negative square root of <i>numeric</i>. - */ - -static VALUE -math_sqrt(obj, x) - VALUE obj, x; -{ - double d; - - Need_Float(x); - errno = 0; - d = sqrt(RFLOAT(x)->value); - domain_check(d, "sqrt"); - return rb_float_new(d); -} - -/* - * call-seq: - * Math.frexp(numeric) => [ fraction, exponent ] - * - * Returns a two-element array containing the normalized fraction (a - * <code>Float</code>) and exponent (a <code>Fixnum</code>) of - * <i>numeric</i>. - * - * fraction, exponent = Math.frexp(1234) #=> [0.6025390625, 11] - * fraction * 2**exponent #=> 1234.0 - */ - -static VALUE -math_frexp(obj, x) - VALUE obj, x; -{ - double d; - int exp; - - Need_Float(x); - - d = frexp(RFLOAT(x)->value, &exp); - return rb_assoc_new(rb_float_new(d), INT2NUM(exp)); -} - -/* - * call-seq: - * Math.ldexp(flt, int) -> float - * - * Returns the value of <i>flt</i>*(2**<i>int</i>). - * - * fraction, exponent = Math.frexp(1234) - * Math.ldexp(fraction, exponent) #=> 1234.0 - */ - -static VALUE -math_ldexp(obj, x, n) - VALUE obj, x, n; -{ - Need_Float(x); - return rb_float_new(ldexp(RFLOAT(x)->value, NUM2INT(n))); -} - -/* - * call-seq: - * Math.hypot(x, y) => float - * - * Returns sqrt(x**2 + y**2), the hypotenuse of a right-angled triangle - * with sides <i>x</i> and <i>y</i>. - * - * Math.hypot(3, 4) #=> 5.0 - */ - -static VALUE -math_hypot(obj, x, y) - VALUE obj, x, y; -{ - Need_Float2(x, y); - return rb_float_new(hypot(RFLOAT(x)->value, RFLOAT(y)->value)); -} - -/* - * call-seq: - * Math.erf(x) => float - * - * Calculates the error function of x. - */ - -static VALUE -math_erf(obj, x) - VALUE obj, x; -{ - Need_Float(x); - return rb_float_new(erf(RFLOAT(x)->value)); -} - -/* - * call-seq: - * Math.erfc(x) => float - * - * Calculates the complementary error function of x. - */ - -static VALUE -math_erfc(obj, x) - VALUE obj, x; -{ - Need_Float(x); - return rb_float_new(erfc(RFLOAT(x)->value)); -} - -/* - * The <code>Math</code> module contains module functions for basic - * trigonometric and transcendental functions. See class - * <code>Float</code> for a list of constants that - * define Ruby's floating point accuracy. - */ - - -void -Init_Math() -{ - rb_mMath = rb_define_module("Math"); - -#ifdef M_PI - rb_define_const(rb_mMath, "PI", rb_float_new(M_PI)); -#else - rb_define_const(rb_mMath, "PI", rb_float_new(atan(1.0)*4.0)); -#endif - -#ifdef M_E - rb_define_const(rb_mMath, "E", rb_float_new(M_E)); -#else - rb_define_const(rb_mMath, "E", rb_float_new(exp(1.0))); -#endif - - rb_define_module_function(rb_mMath, "atan2", math_atan2, 2); - rb_define_module_function(rb_mMath, "cos", math_cos, 1); - rb_define_module_function(rb_mMath, "sin", math_sin, 1); - rb_define_module_function(rb_mMath, "tan", math_tan, 1); - - rb_define_module_function(rb_mMath, "acos", math_acos, 1); - rb_define_module_function(rb_mMath, "asin", math_asin, 1); - rb_define_module_function(rb_mMath, "atan", math_atan, 1); - - rb_define_module_function(rb_mMath, "cosh", math_cosh, 1); - rb_define_module_function(rb_mMath, "sinh", math_sinh, 1); - rb_define_module_function(rb_mMath, "tanh", math_tanh, 1); - - rb_define_module_function(rb_mMath, "acosh", math_acosh, 1); - rb_define_module_function(rb_mMath, "asinh", math_asinh, 1); - rb_define_module_function(rb_mMath, "atanh", math_atanh, 1); - - rb_define_module_function(rb_mMath, "exp", math_exp, 1); - rb_define_module_function(rb_mMath, "log", math_log, 1); - rb_define_module_function(rb_mMath, "log10", math_log10, 1); - rb_define_module_function(rb_mMath, "sqrt", math_sqrt, 1); - - rb_define_module_function(rb_mMath, "frexp", math_frexp, 1); - rb_define_module_function(rb_mMath, "ldexp", math_ldexp, 2); - - rb_define_module_function(rb_mMath, "hypot", math_hypot, 2); - - rb_define_module_function(rb_mMath, "erf", math_erf, 1); - rb_define_module_function(rb_mMath, "erfc", math_erfc, 1); -} |