(utf-8-subst-table)

(utf-8-subst-table)
(utf-8-subst-rev-table, utf-8-translation-table-for-decode)
(utf-8-fragment-on-decoding, ccl-untranslated-to-ucs)
(utf-8-ccl-regs, utf-8-translate-cjk): New.
(ccl-encode-mule-utf-8): Use utf-8-subst-rev-table.
(ccl-decode-mule-utf-8, ccl-untranslated-to-ucs)
(utf-8-untranslated-to-ucs, utf-8-compose): Rewritten.
(mule-utf-8): Remove pre-write-conversion.
(utf-8-post-read-conversion): Comment out.