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mruby-numeric-ext: add Integer#size method

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Although CRuby uses clz() for the biggest word, mruby bigint only counts
number of digit words.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2024-07-10 14:50:54 +09:00
parent a77bc25a5f
commit ee296f024b
1 changed files with 13 additions and 0 deletions
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mrbgems/mruby-numeric-ext/src/numeric_ext.c
+13
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@@ -200,6 +200,18 @@ int_digits(mrb_state *mrb, mrb_value self)
return digits;
}
static mrb_value
int_size(mrb_state *mrb, mrb_value self)
{
size_t size = sizeof(mrb_int);
#ifdef MRB_USE_BIGINT
if (mrb_bigint_p(self)) {
size = mrb_bint_memsize(self);
}
#endif
return mrb_fixnum_value((mrb_int)size);
}
#ifndef MRB_NO_FLOAT
static mrb_value
flo_remainder(mrb_state *mrb, mrb_value self)
@@ -224,6 +236,7 @@ mrb_mruby_numeric_ext_gem_init(mrb_state* mrb)
mrb_define_method_id(mrb, ic, MRB_SYM(pow), int_powm, MRB_ARGS_ARG(1,1));
mrb_define_method_id(mrb, ic, MRB_SYM(digits), int_digits, MRB_ARGS_OPT(1));
mrb_define_method_id(mrb, ic, MRB_SYM(size), int_size, MRB_ARGS_NONE());
#ifndef MRB_NO_FLOAT
struct RClass *fc = mrb->float_class;