120 lines
2.2 KiB
C
120 lines
2.2 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) 1993-1996 Yukihiro Matsumoto
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************************************************/
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#include "ruby.h"
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#include <math.h>
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VALUE mMath;
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#define Need_Float(x) (x) = rb_Float(x)
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#define Need_Float2(x,y) {\
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Need_Float(x);\
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Need_Float(y);\
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}
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static VALUE
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math_atan2(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 float_new(atan2(RFLOAT(x)->value, RFLOAT(y)->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 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 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 float_new(tan(RFLOAT(x)->value));
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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 float_new(exp(RFLOAT(x)->value));
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}
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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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Need_Float(x);
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return float_new(log(RFLOAT(x)->value));
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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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Need_Float(x);
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return float_new(log10(RFLOAT(x)->value));
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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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Need_Float(x);
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if (RFLOAT(x)->value < 0.0) ArgError("square root for negative number");
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return float_new(sqrt(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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mMath = rb_define_module("Math");
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#ifdef M_PI
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rb_define_const(mMath, "PI", float_new(M_PI));
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#else
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rb_define_const(mMath, "PI", 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(mMath, "E", float_new(M_E));
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#else
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rb_define_const(mMath, "E", float_new(exp(1.0)));
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#endif
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rb_define_module_function(mMath, "atan2", math_atan2, 2);
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rb_define_module_function(mMath, "cos", math_cos, 1);
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rb_define_module_function(mMath, "sin", math_sin, 1);
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rb_define_module_function(mMath, "tan", math_tan, 1);
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rb_define_module_function(mMath, "exp", math_exp, 1);
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rb_define_module_function(mMath, "log", math_log, 1);
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rb_define_module_function(mMath, "log10", math_log10, 1);
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rb_define_module_function(mMath, "sqrt", math_sqrt, 1);
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}
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