complex.c: implement `Complex` addition and subtraction in C.
MODIFY
mrbgems/mruby-complex/mrblib/complex.rb
mrbgems/mruby-complex/mrblib/complex.rb
@@ -19,22 +19,6 @@ class Complex < Numeric
Complex(-real, -imaginary)
end
- def +(rhs)
- if rhs.is_a? Complex
- Complex(real + rhs.real, imaginary + rhs.imaginary)
- elsif rhs.is_a? Numeric
- Complex(real + rhs, imaginary)
- end
- end
-
- def -(rhs)
- if rhs.is_a? Complex
- Complex(real - rhs.real, imaginary - rhs.imaginary)
- elsif rhs.is_a? Numeric
- Complex(real - rhs, imaginary)
- end
- end
-
def abs
Math.hypot imaginary, real
end

MODIFY
mrbgems/mruby-complex/src/complex.c
mrbgems/mruby-complex/src/complex.c
@@ -171,6 +171,48 @@ complex_eq(mrb_state *mrb, mrb_value x)
return mrb_bool_value(mrb_complex_eq(mrb, x, y));
}
+static mrb_value
+complex_add(mrb_state *mrb, mrb_value x)
+{
+ mrb_value y = mrb_get_arg1(mrb);
+ struct mrb_complex *p1 = complex_ptr(mrb, x);
+
+ switch (mrb_type(y)) {
+ case MRB_TT_COMPLEX:
+ {
+ struct mrb_complex *p2 = complex_ptr(mrb, y);
+ return mrb_complex_new(mrb, p1->real+p2->real, p1->imaginary+p2->imaginary);
+ }
+
+ default:
+ {
+ mrb_float z = mrb_to_flo(mrb, y);
+ return mrb_complex_new(mrb, p1->real+z, p1->imaginary);
+ }
+ }
+}
+
+static mrb_value
+complex_sub(mrb_state *mrb, mrb_value x)
+{
+ mrb_value y = mrb_get_arg1(mrb);
+ struct mrb_complex *p1 = complex_ptr(mrb, x);
+
+ switch (mrb_type(y)) {
+ case MRB_TT_COMPLEX:
+ {
+ struct mrb_complex *p2 = complex_ptr(mrb, y);
+ return mrb_complex_new(mrb, p1->real-p2->real, p1->imaginary-p2->imaginary);
+ }
+
+ default:
+ {
+ mrb_float z = mrb_to_flo(mrb, y);
+ return mrb_complex_new(mrb, p1->real-z, p1->imaginary);
+ }
+ }
+}
+
static mrb_value
complex_mul(mrb_state *mrb, mrb_value x)
{
@@ -386,6 +428,8 @@ void mrb_mruby_complex_gem_init(mrb_state *mrb)
mrb_define_method(mrb, comp, "to_f", complex_to_f, MRB_ARGS_NONE());
mrb_define_method(mrb, comp, "to_i", complex_to_i, MRB_ARGS_NONE());
mrb_define_method(mrb, comp, "to_c", complex_to_c, MRB_ARGS_NONE());
+ mrb_define_method(mrb, comp, "+", complex_add, MRB_ARGS_REQ(1));
+ mrb_define_method(mrb, comp, "-", complex_sub, MRB_ARGS_REQ(1));
mrb_define_method(mrb, comp, "*", complex_mul, MRB_ARGS_REQ(1));
mrb_define_method(mrb, comp, "/", complex_div, MRB_ARGS_REQ(1));
mrb_define_method(mrb, comp, "quo", complex_div, MRB_ARGS_REQ(1));

complex.c: implement `Complex` addition and subtraction in C.