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reimplement String#<=>

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This commit is contained in:
Yukihiro Matsumoto
2012-05-31 16:33:03 +09:00
parent b05014f6a9
commit 5450f925da
1 changed files with 25 additions and 1 deletions
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src/string.c
+25 -1
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@@ -464,7 +464,31 @@ mrb_str_cmp(mrb_state *mrb, mrb_value str1, mrb_value str2)
static mrb_value
mrb_str_cmp_m(mrb_state *mrb, mrb_value str1)
{
return mrb_nil_value();
mrb_value str2;
mrb_int result;
mrb_get_args(mrb, "o", &str2);
if (mrb_type(str2) != MRB_TT_STRING) {
if (!mrb_respond_to(mrb, str2, mrb_intern(mrb, "to_s"))) {
return mrb_nil_value();
}
else if (!mrb_respond_to(mrb, str2, mrb_intern(mrb, "<=>"))) {
return mrb_nil_value();
}
else {
mrb_value tmp = mrb_funcall(mrb, str2, "<=>", 1, str1);
if (mrb_nil_p(tmp)) return mrb_nil_value();
if (!mrb_fixnum(tmp)) {
return mrb_funcall(mrb, mrb_fixnum_value(0), "-", 1, tmp);
}
result = -mrb_fixnum(tmp);
}
}
else {
result = mrb_str_cmp(mrb, str1, str2);
}
return mrb_fixnum_value(result);
}
static int