CLASS_UNICODE     422 ext/nkf/nkf-utf8/nkf.c #define nkf_char_unicode_new(c) ((c) | CLASS_UNICODE)
CLASS_UNICODE     423 ext/nkf/nkf-utf8/nkf.c #define nkf_char_unicode_p(c) ((c & CLASS_MASK) == CLASS_UNICODE)