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#include <mruby.h>
#include <mruby/class.h>
#include <mruby/string.h>
#include <mruby/istruct.h>
struct mrb_rational {
mrb_int numerator;
mrb_int denominator;
};
static struct mrb_rational*
rational_ptr(mrb_value v)
{
return (struct mrb_rational*)mrb_istruct_ptr(v);
}
static mrb_value
rational_numerator(mrb_state *mrb, mrb_value self)
{
struct mrb_rational *p = rational_ptr(self);
return mrb_fixnum_value(p->numerator);
}
static mrb_value
rational_denominator(mrb_state *mrb, mrb_value self)
{
struct mrb_rational *p = rational_ptr(self);
return mrb_fixnum_value(p->denominator);
}
static mrb_value
rational_initialize(mrb_state *mrb, mrb_value self)
{
struct mrb_rational *p = rational_ptr(self);
mrb_get_args(mrb, "ii", &p->numerator, &p->denominator);
return self;
}
static mrb_value
rational_to_f(mrb_state *mrb, mrb_value self)
{
struct mrb_rational *p = rational_ptr(self);
mrb_float f = (mrb_float)p->numerator / (mrb_float)p->denominator;
return mrb_float_value(mrb, f);
}
static mrb_value
rational_to_i(mrb_state *mrb, mrb_value self)
{
struct mrb_rational *p = rational_ptr(self);
return mrb_fixnum_value(p->numerator / p->denominator);
}
static mrb_value
rational_to_r(mrb_state *mrb, mrb_value self)
{
return self;
}
static mrb_value
rational_negative_p(mrb_state *mrb, mrb_value self)
{
struct mrb_rational *p = rational_ptr(self);
if (p->numerator < 0) {
return mrb_true_value();
}
return mrb_false_value();
}
void mrb_mruby_rational_gem_init(mrb_state *mrb)
{
struct RClass *rat;
mrb_assert(sizeof(struct mrb_rational) < ISTRUCT_DATA_SIZE);
rat = mrb_define_class(mrb, "Rational", mrb_class_get(mrb, "Numeric"));
MRB_SET_INSTANCE_TT(rat, MRB_TT_ISTRUCT);
mrb_define_method(mrb, rat, "numerator", rational_numerator, MRB_ARGS_NONE());
mrb_define_method(mrb, rat, "denominator", rational_denominator, MRB_ARGS_NONE());
mrb_define_method(mrb, rat, "initialize", rational_initialize, MRB_ARGS_REQ(2));
mrb_define_method(mrb, rat, "to_f", rational_to_f, MRB_ARGS_NONE());
mrb_define_method(mrb, rat, "to_i", rational_to_i, MRB_ARGS_NONE());
mrb_define_method(mrb, rat, "to_r", rational_to_r, MRB_ARGS_NONE());
mrb_define_method(mrb, rat, "negative?", rational_negative_p, MRB_ARGS_NONE());
}
void
mrb_mruby_rational_gem_final(mrb_state* mrb)
{
}
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