re.c:1588
const char*
rb_get_kcode()
{
    switch (reg_kcode) {
      case KCODE_SJIS:
	return "SJIS";
      case KCODE_EUC:
	return "EUC";
      case KCODE_UTF8:
	return "UTF8";
      default:
	return "NONE";
    }
}
