:type 'boolean
:group 'mule)
+
+(defconst utf-translate-cjk-charsets '(chinese-gb2312
+ chinese-big5-1 chinese-big5-2
+ japanese-jisx0208 japanese-jisx0212
+ korean-ksc5601)
+ "List of charsets supported by `utf-translate-cjk-mode'.")
+
+(defconst utf-translate-cjk-unicode-range
+ '((#x2e80 . #xd7a3)
+ (#xff00 . #xffef))
+ "List of Unicode code ranges supported by `utf-translate-cjk-mode'.")
+
+;; Return non-nil if CODE-POINT is in `utf-translate-cjk-unicode-range'.
+(defsubst utf-translate-cjk-substitutable-p (code-point)
+ (let ((tail utf-translate-cjk-unicode-range)
+ elt)
+ (while tail
+ (setq elt (car tail) tail (cdr tail))
+ (if (and (>= code-point (car elt)) (<= code-point (cdr elt)))
+ (setq tail nil)
+ (setq elt nil)))
+ elt))
+
+(defvar utf-translate-cjk-lang-env nil
+ "Language environment in which tables for `utf-translate-cjk-mode' is loaded.
+The value nil means that the tables are not yet loaded.")
+
+(defun utf-translate-cjk-load-tables ()
+ "Load tables for `utf-translate-cjk-mode'."
+ ;; Fixme: Allow the use of the CJK charsets to be
+ ;; customized by reordering and possible omission.
+ (let ((redefined (< (hash-table-size ucs-mule-cjk-to-unicode) 43000)))
+ (if redefined
+ ;; Redefine them with realistic initial sizes and a
+ ;; smallish rehash size to avoid wasting significant
+ ;; space after they're built.
+ (setq ucs-mule-cjk-to-unicode
+ (make-hash-table :test 'eq :size 43000 :rehash-size 1000)
+ ucs-unicode-to-mule-cjk
+ (make-hash-table :test 'eq :size 21500 :rehash-size 1000)))
+
+ ;; Load the files explicitly, to avoid having to keep
+ ;; around the large tables they contain (as well as the
+ ;; ones which get built).
+ (cond ((string= "Korean" current-language-environment)
+ (load "subst-jis")
+ (load "subst-big5")
+ (load "subst-gb2312")
+ (load "subst-ksc"))
+ ((string= "Chinese-BIG5" current-language-environment)
+ (load "subst-jis")
+ (load "subst-ksc")
+ (load "subst-gb2312")
+ (load "subst-big5"))
+ ((string= "Chinese-GB" current-language-environment)
+ (load "subst-jis")
+ (load "subst-ksc")
+ (load "subst-big5")
+ (load "subst-gb2312"))
+ (t
+ (load "subst-ksc")
+ (load "subst-gb2312")
+ (load "subst-big5")
+ (load "subst-jis"))) ; jis covers as much as big5, gb2312
+
+ (when redefined
+ (define-translation-hash-table 'utf-subst-table-for-decode
+ ucs-unicode-to-mule-cjk)
+ (define-translation-hash-table 'utf-subst-table-for-encode
+ ucs-mule-cjk-to-unicode)
+ (set-char-table-extra-slot (get 'utf-translation-table-for-encode
+ 'translation-table)
+ 1 ucs-mule-cjk-to-unicode))
+
+ (setq utf-translate-cjk-lang-env current-language-environment)))
+
+(defun utf-lookup-subst-table-for-decode (code-point)
+ (if (and utf-translate-cjk-mode
+ (not utf-translate-cjk-lang-env)
+ (utf-translate-cjk-substitutable-p code-point))
+ (utf-translate-cjk-load-tables))
+ (gethash code-point
+ (get 'utf-subst-table-for-decode 'translation-hash-table)))
+
+
+(defun utf-lookup-subst-table-for-encode (char)
+ (if (and utf-translate-cjk-mode
+ (not utf-translate-cjk-lang-env)
+ (memq (char-charset char) utf-translate-cjk-charsets))
+ (utf-translate-cjk-load-tables))
+ (gethash char
+ (get 'utf-subst-table-for-encode 'translation-hash-table)))
+
(define-minor-mode utf-translate-cjk-mode
"Whether the UTF based coding systems should decode/encode CJK characters.
-Enabling this loads tables which allow the coding systems mule-utf-8,
+Enabling this allows the coding systems mule-utf-8,
mule-utf-16le and mule-utf-16be to encode characters in the charsets
`korean-ksc5601', `chinese-gb2312', `chinese-big5-1',
`chinese-big5-2', `japanese-jisx0208' and `japanese-jisx0212', and to
turned on: ksc5601 for Korean, gb2312 for Chinese-GB, big5 for
Chinese-Big5 and jisx for other environments.
-The tables are large (over 40000 entries), so this option is not the
-default. Also, installing them may be rather slow."
- :init-value nil
+This option is on by default. If you are not interested in CJK
+characters and want to avoid some overhead on encoding/decoding
+by the above coding systems, you can customize this option to nil."
+ :init-value t
:version "21.4"
:type 'boolean
- :set-after '(current-language-environment)
:group 'mule
:global t
(if utf-translate-cjk-mode
- ;; Fixme: Allow the use of the CJK charsets to be
- ;; customized by reordering and possible omission.
(progn
- ;; Redefine them with realistic initial sizes and a
- ;; smallish rehash size to avoid wasting significant
- ;; space after they're built.
- (setq ucs-mule-cjk-to-unicode
- (make-hash-table :test 'eq :size 43000 :rehash-size 1000)
- ucs-unicode-to-mule-cjk
- (make-hash-table :test 'eq :size 21500 :rehash-size 1000))
- ;; Load the files explicitly, to avoid having to keep
- ;; around the large tables they contain (as well as the
- ;; ones which get built).
- (cond
- ((string= "Korean" current-language-environment)
- (load "subst-jis")
- (load "subst-big5")
- (load "subst-gb2312")
- (load "subst-ksc"))
- ((string= "Chinese-BIG5" current-language-environment)
- (load "subst-jis")
- (load "subst-ksc")
- (load "subst-gb2312")
- (load "subst-big5"))
- ((string= "Chinese-GB" current-language-environment)
- (load "subst-jis")
- (load "subst-ksc")
- (load "subst-big5")
- (load "subst-gb2312"))
- (t
- (load "subst-ksc")
- (load "subst-gb2312")
- (load "subst-big5")
- (load "subst-jis"))) ; jis covers as much as big5, gb2312
(define-translation-hash-table 'utf-subst-table-for-decode
ucs-unicode-to-mule-cjk)
(define-translation-hash-table 'utf-subst-table-for-encode
(make-hash-table :test 'eq))
(set-char-table-extra-slot (get 'utf-translation-table-for-encode
'translation-table)
- 1 nil)))
+ 1 nil))
+
+ ;; Update safe-chars of mule-utf-* coding systems.
+ (dolist (elt (coding-system-list t))
+ (if (string-match "^mule-utf" (symbol-name elt))
+ (let ((safe-charsets (coding-system-get elt 'safe-charsets))
+ (safe-chars (coding-system-get elt 'safe-chars))
+ (need-update nil))
+ (dolist (charset utf-translate-cjk-charsets)
+ (unless (eq utf-translate-cjk-mode (memq charset safe-charsets))
+ (setq safe-charsets
+ (if utf-translate-cjk-mode
+ (cons charset safe-charsets)
+ (delq charset safe-charsets))
+ need-update t)
+ (aset safe-chars (make-char charset) utf-translate-cjk-mode)))
+ (when need-update
+ (coding-system-put elt 'safe-charsets safe-charsets)
+ (define-coding-system-internal elt))))))
+
+(define-ccl-program ccl-mule-utf-untrans
+ ;; R0 is an untranslatable Unicode code-point (U+3500..U+DFFF or
+ ;; U+10000..U+10FFFF) or an invaid byte (#x00..#xFF). Write
+ ;; eight-bit-control/graphic sequence (2 to 4 chars) representing
+ ;; UTF-8 sequence of r0. Registers r4, r5, r6 are modified.
+ ;;
+ ;; This is a subrountine because we assume that this is called very
+ ;; rarely (so we don't have to worry about the overhead of the
+ ;; call).
+ `(0
+ ((r5 = ,(charset-id 'eight-bit-control))
+ (r6 = ,(charset-id 'eight-bit-graphic))
+ (if (r0 < #x100)
+ ((r4 = ((r0 >> 6) | #xC0))
+ (write-multibyte-character r6 r4))
+ ((if (r0 < #x10000)
+ ((r4 = ((r0 >> 12) | #xE0))
+ (write-multibyte-character r6 r4))
+ ((r4 = ((r0 >> 18) | #xF0))
+ (write-multibyte-character r6 r4)
+ (r4 = (((r0 >> 12) & #x3F) | #x80))
+ (if (r4 < #xA0)
+ (write-multibyte-character r5 r4)
+ (write-multibyte-character r6 r4))))
+ (r4 = (((r0 >> 6) & #x3F) | #x80))
+ (if (r4 < #xA0)
+ (write-multibyte-character r5 r4)
+ (write-multibyte-character r6 r4))))
+ (r4 = ((r0 & #x3F) | #x80))
+ (if (r4 < #xA0)
+ (write-multibyte-character r5 r4)
+ (write-multibyte-character r6 r4)))))
(define-ccl-program ccl-decode-mule-utf-8
;;
;; (>= 8000) | |
;; mule-unicode-2500-33ff | 3 | 4
;; mule-unicode-e000-ffff | 3 | 4
+ ;; -----------------------+----------------+---------------
+ ;; invalid byte | 1 | 2
;;
;; Thus magnification factor is two.
;;
`(2
- ((r5 = ,(charset-id 'eight-bit-control))
- (r6 = ,(charset-id 'eight-bit-graphic))
+ ((r0 = -1)
(loop
- (r0 = -1)
- (read r0)
-
- ;; 1byte encoding, i.e., ascii
+ (if (r0 < 0)
+ (read r0))
(if (r0 < #x80)
- ((write r0))
- (if (r0 < #xc0) ; continuation byte (invalid here)
- ((if (r0 < #xa0)
- (write-multibyte-character r5 r0)
- (write-multibyte-character r6 r0)))
- ;; 2 byte encoding 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx
- (if (r0 < #xe0)
- ((r1 = -1)
- (read r1)
-
- (if ((r1 & #b11000000) != #b10000000)
- ;; Invalid 2-byte sequence
- ((if (r0 < #xa0)
- (write-multibyte-character r5 r0)
- (write-multibyte-character r6 r0))
- (if (r1 < #x80)
- (write r1)
- (if (r1 < #xa0)
- (write-multibyte-character r5 r1)
- (write-multibyte-character r6 r1))))
-
- ((r3 = r0) ; save in case of overlong sequence
- (r2 = r1)
- (r0 &= #x1f)
- (r0 <<= 6)
- (r1 &= #x3f)
- (r1 += r0)
- ;; Now r1 holds scalar value
-
- (if (r1 < 128) ; `overlong sequence'
- ((if (r3 < #xa0)
- (write-multibyte-character r5 r3)
- (write-multibyte-character r6 r3))
- (if (r2 < #x80)
- (write r2)
- (if (r2 < #xa0)
- (write-multibyte-character r5 r2)
- (write-multibyte-character r6 r2))))
-
- ;; eight-bit-control
- (if (r1 < 160)
- ((write-multibyte-character r5 r1))
-
- ;; latin-iso8859-1
- (if (r1 < 256)
- ((r0 = ,(charset-id 'latin-iso8859-1))
- (r1 -= 128)
- (write-multibyte-character r0 r1))
-
- ;; mule-unicode-0100-24ff (< 0800)
- ((r0 = ,(charset-id 'mule-unicode-0100-24ff))
- (r1 -= #x0100)
- (r2 = (((r1 / 96) + 32) << 7))
- (r1 %= 96)
- (r1 += (r2 + 32))
- (translate-character
- utf-translation-table-for-decode r0 r1)
- (write-multibyte-character r0 r1))))))))
-
- ;; 3byte encoding
- ;; zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx
- (if (r0 < #xf0)
- ((r1 = -1)
- (r2 = -1)
- (read r1 r2)
-
- ;; This is set to 1 if the encoding is invalid.
- (r4 = 0)
-
- (r3 = (r1 & #b11000000))
- (r3 |= ((r2 >> 2) & #b00110000))
- (if (r3 != #b10100000)
- (r4 = 1)
- ((r3 = ((r0 & #x0f) << 12))
- (r3 += ((r1 & #x3f) << 6))
- (r3 += (r2 & #x3f))
- (if (r3 < #x0800)
- (r4 = 1))))
-
- (if (r4 != 0)
- ;; Invalid 3-byte sequence
- ((if (r0 < #xa0)
- (write-multibyte-character r5 r0)
- (write-multibyte-character r6 r0))
- (if (r1 < #x80)
- (write r1)
- (if (r1 < #xa0)
- (write-multibyte-character r5 r1)
- (write-multibyte-character r6 r1)))
- (if (r2 < #x80)
- (write r2)
- (if (r2 < #xa0)
- (write-multibyte-character r5 r2)
- (write-multibyte-character r6 r2))))
-
- ;; mule-unicode-0100-24ff (>= 0800)
- ((if (r3 < #x2500)
- ((r0 = ,(charset-id 'mule-unicode-0100-24ff))
- (r3 -= #x0100)
- (r3 //= 96)
- (r1 = (r7 + 32))
- (r1 += ((r3 + 32) << 7))
- (translate-character
- utf-translation-table-for-decode r0 r1)
- (write-multibyte-character r0 r1))
-
- ;; mule-unicode-2500-33ff
- (if (r3 < #x3400)
- ((r4 = r3) ; don't zap r3
- (lookup-integer utf-subst-table-for-decode r4 r5)
- (if r7
- ;; got a translation
- ((write-multibyte-character r4 r5)
- ;; Zapped through register starvation.
- (r5 = ,(charset-id 'eight-bit-control)))
- ((r0 = ,(charset-id 'mule-unicode-2500-33ff))
- (r3 -= #x2500)
- (r3 //= 96)
- (r1 = (r7 + 32))
- (r1 += ((r3 + 32) << 7))
- (write-multibyte-character r0 r1))))
-
- ;; U+3400 .. U+D7FF
- ;; Try to convert to CJK chars, else keep
- ;; them as eight-bit-{control|graphic}.
- (if (r3 < #xd800)
- ((r4 = r3) ; don't zap r3
- (lookup-integer utf-subst-table-for-decode r4 r5)
- (if r7
- ;; got a translation
- ((write-multibyte-character r4 r5)
- ;; Zapped through register starvation.
- (r5 = ,(charset-id 'eight-bit-control)))
- ;; #xe0 <= r0 < #xf0, so r0 is eight-bit-graphic
- ((r3 = r6)
- (write-multibyte-character r3 r0)
- (if (r1 < #xa0)
- (r3 = r5))
- (write-multibyte-character r3 r1)
- (if (r2 < #xa0)
- (r3 = r5)
- (r3 = r6))
- (write-multibyte-character r3 r2))))
-
- ;; Surrogates, U+D800 .. U+DFFF
- (if (r3 < #xe000)
- ((r3 = r6)
- (write-multibyte-character r3 r0) ; eight-bit-graphic
- (if (r1 < #xa0)
- (r3 = r5))
- (write-multibyte-character r3 r1)
- (if (r2 < #xa0)
- (r3 = r5)
- (r3 = r6))
- (write-multibyte-character r3 r2))
-
- ;; mule-unicode-e000-ffff
- ;; Fixme: fffe and ffff are invalid.
- ((r4 = r3) ; don't zap r3
- (lookup-integer utf-subst-table-for-decode r4 r5)
- (if r7
- ;; got a translation
- ((write-multibyte-character r4 r5)
- ;; Zapped through register starvation.
- (r5 = ,(charset-id 'eight-bit-control)))
- ((r0 = ,(charset-id 'mule-unicode-e000-ffff))
- (r3 -= #xe000)
- (r3 //= 96)
- (r1 = (r7 + 32))
- (r1 += ((r3 + 32) << 7))
- (write-multibyte-character r0 r1)))))))))))
-
- (if (r0 < #xfe)
- ;; 4byte encoding
- ;; keep those bytes as eight-bit-{control|graphic}
- ;; Fixme: allow lookup in utf-subst-table-for-decode.
- ((r1 = -1)
- (r2 = -1)
- (r3 = -1)
- (read r1 r2 r3)
- ;; r0 > #xf0, thus eight-bit-graphic
- (write-multibyte-character r6 r0)
- (if (r1 < #xa0)
- (if (r1 < #x80) ; invalid byte
- (write r1)
- (write-multibyte-character r5 r1))
- (write-multibyte-character r6 r1))
- (if (r2 < #xa0)
- (if (r2 < #x80) ; invalid byte
- (write r2)
- (write-multibyte-character r5 r2))
- (write-multibyte-character r6 r2))
- (if (r3 < #xa0)
- (if (r3 < #x80) ; invalid byte
- (write r3)
- (write-multibyte-character r5 r3))
- (write-multibyte-character r6 r3))
- (if (r0 >= #xf8) ; 5- or 6-byte encoding
- ((r0 = -1)
- (read r0)
- (if (r0 < #xa0)
- (if (r0 < #x80) ; invalid byte
- (write r0)
- (write-multibyte-character r5 r0))
- (write-multibyte-character r6 r0))
- (if (r0 >= #xfc) ; 6-byte
- ((r0 = -1)
- (read r0)
- (if (r0 < #xa0)
- (if (r0 < #x80) ; invalid byte
- (write r0)
- (write-multibyte-character r5 r0))
- (write-multibyte-character r6 r0)))))))
- ;; else invalid byte >= #xfe
- (write-multibyte-character r6 r0))))))
+ ;; 1-byte encoding, i.e., ascii
+ ((write r0)
+ (r0 = -1)
+ (repeat)))
+ (if (r0 < #xc0) ; continuation byte (invalid here)
+ ((call ccl-mule-utf-untrans)
+ (r0 = -1)
+ (repeat)))
+
+ ;; Read the 2nd byte.
+ (r1 = -1)
+ (read r1)
+ (if ((r1 & #b11000000) != #b10000000) ; Invalid 2nd byte
+ ((call ccl-mule-utf-untrans)
+ ;; Handle it in the next loop.
+ (r0 = r1)
+ (repeat)))
+
+ (if (r0 < #xe0)
+ ;; 2-byte encoding 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx
+ ((r2 = ((r0 & #x1F) << 6))
+ (r2 |= (r1 & #x3F))
+ ;; Now r2 holds scalar value
+
+ (if (r2 < 128) ; `overlong sequence'
+ ((call ccl-mule-utf-untrans)
+ (r0 = r1)
+ (call ccl-mule-utf-untrans)
+ (r0 = -1)
+ (repeat)))
+
+ (r1 = r2)
+ (if (r1 < 160)
+ ;; eight-bit-control
+ (r0 = ,(charset-id 'eight-bit-control))
+ (if (r1 < 256)
+ ;; latin-iso8859-1
+ ((r0 = ,(charset-id 'latin-iso8859-1))
+ (r1 -= 128))
+ ;; mule-unicode-0100-24ff (< 0800)
+ ((r0 = ,(charset-id 'mule-unicode-0100-24ff))
+ (r1 -= #x0100)
+ (r2 = (((r1 / 96) + 32) << 7))
+ (r1 %= 96)
+ (r1 += (r2 + 32))
+ (translate-character
+ utf-translation-table-for-decode r0 r1))))
+ (write-multibyte-character r0 r1)
+ (r0 = -1)
+ (repeat)))
+
+ ;; Read the 3rd bytes.
+ (r2 = -1)
+ (read r2)
+ (if ((r2 & #b11000000) != #b10000000) ; Invalid 3rd byte
+ ((call ccl-mule-utf-untrans)
+ (r0 = r1)
+ (call ccl-mule-utf-untrans)
+ ;; Handle it in the next loop.
+ (r0 = r2)
+ (repeat)))
+
+ (if (r0 < #xF0)
+ ;; 3byte encoding
+ ;; zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx
+ ((r3 = ((r0 & #xF) << 12))
+ (r3 |= ((r1 & #x3F) << 6))
+ (r3 |= (r2 & #x3F))
+
+ (if (r3 < #x800) ; `overlong sequence'
+ ((call ccl-mule-utf-untrans)
+ (r0 = r1)
+ (call ccl-mule-utf-untrans)
+ (r0 = r2)
+ (call ccl-mule-utf-untrans)
+ (r0 = -1)
+ (repeat)))
+
+ (if (r3 < #x2500)
+ ;; mule-unicode-0100-24ff (>= 0800)
+ ((r0 = ,(charset-id 'mule-unicode-0100-24ff))
+ (r3 -= #x0100)
+ (r3 //= 96)
+ (r1 = (r7 + 32))
+ (r1 += ((r3 + 32) << 7))
+ (translate-character
+ utf-translation-table-for-decode r0 r1)
+ (write-multibyte-character r0 r1)
+ (r0 = -1)
+ (repeat)))
+
+ (if (r3 < #x3400)
+ ;; mule-unicode-2500-33ff
+ ((r0 = r3) ; don't zap r3
+ (lookup-integer utf-subst-table-for-decode r0 r1)
+ (if (r7 == 0)
+ ((r0 = ,(charset-id 'mule-unicode-2500-33ff))
+ (r3 -= #x2500)
+ (r3 //= 96)
+ (r1 = (r7 + 32))
+ (r1 += ((r3 + 32) << 7))))
+ (write-multibyte-character r0 r1)
+ (r0 = -1)
+ (repeat)))
+
+ (if (r3 < #xE000)
+ ;; Try to convert to CJK chars, else
+ ;; keep them as eight-bit-{control|graphic}.
+ ((r0 = r3)
+ (lookup-integer utf-subst-table-for-decode r3 r1)
+ (if r7
+ ;; got a translation
+ (write-multibyte-character r3 r1)
+ (call ccl-mule-utf-untrans))
+ (r0 = -1)
+ (repeat)))
+
+ ;; mule-unicode-e000-ffff
+ ;; Fixme: fffe and ffff are invalid.
+ (r0 = r3) ; don't zap r3
+ (lookup-integer utf-subst-table-for-decode r0 r1)
+ (if (r7 == 0)
+ ((r0 = ,(charset-id 'mule-unicode-e000-ffff))
+ (r3 -= #xe000)
+ (r3 //= 96)
+ (r1 = (r7 + 32))
+ (r1 += ((r3 + 32) << 7))))
+ (write-multibyte-character r0 r1)
+ (r0 = -1)
+ (repeat)))
+
+ ;; Read the 4th bytes.
+ (r3 = -1)
+ (read r3)
+ (if ((r3 & #b11000000) != #b10000000) ; Invalid 4th byte
+ ((call ccl-mule-utf-untrans)
+ (r0 = r1)
+ (call ccl-mule-utf-untrans)
+ ;; Handle it in the next loop.
+ (r0 = r3)
+ (repeat)))
+
+ (if (r3 < #xF8)
+ ;; 4-byte encoding:
+ ;; wwwzzzzzzyyyyyyxxxxxx = 11110www 10zzzzzz 10yyyyyy 10xxxxxx
+ ;; keep those bytes as eight-bit-{control|graphic}
+ ;; Fixme: allow lookup in utf-subst-table-for-decode.
+ ((r4 = ((r0 & #x7) << 18))
+ (r4 |= ((r1 & #x3F) << 12))
+ (r4 |= ((r2 & #x3F) << 6))
+ (r4 |= (r3 & #x3F))
+
+ (if (r4 < #x10000) ; `overlong sequence'
+ ((call ccl-mule-utf-untrans)
+ (r0 = r1)
+ (call ccl-mule-utf-untrans)
+ (r0 = r2)
+ (call ccl-mule-utf-untrans)
+ (r0 = r3)
+ (call ccl-mule-utf-untrans))
+ ((r0 = r4)
+ (call ccl-mule-utf-untrans)))
+ (r0 = -1)
+ (repeat)))
+
+ ;; Unsupported sequence.
+ (call ccl-mule-utf-untrans)
+ (r0 = r1)
+ (call ccl-mule-utf-untrans)
+ (r0 = r2)
+ (call ccl-mule-utf-untrans)
+ (r0 = r3)
+ (call ccl-mule-utf-untrans)
+ (r0 = -1)
(repeat)))
;; At EOF...
(if (r0 >= 0)
- ((if (r0 < #x80)
- (write r0)
- (if (r0 < #xa0)
- (write-multibyte-character r5 r0)
- ((write-multibyte-character r6 r0))))
+ ;; r0 >= #x80
+ ((call ccl-mule-utf-untrans)
(if (r1 >= 0)
- ((if (r1 < #x80)
- (write r1)
- (if (r1 < #xa0)
- (write-multibyte-character r5 r1)
- ((write-multibyte-character r6 r1))))
+ ((r0 = r1)
+ (call ccl-mule-utf-untrans)
(if (r2 >= 0)
- ((if (r2 < #x80)
- (write r2)
- (if (r2 < #xa0)
- (write-multibyte-character r5 r2)
- ((write-multibyte-character r6 r2))))
+ ((r0 = r2)
+ (call ccl-mule-utf-untrans)
(if (r3 >= 0)
- (if (r3 < #x80)
- (write r3)
- (if (r3 < #xa0)
- (write-multibyte-character r5 r3)
- ((write-multibyte-character r6 r3))))))))))))
+ ((r0 = r3)
+ (call ccl-mule-utf-untrans))))))))))
"CCL program to decode UTF-8.
Basic decoding is done into the charsets ascii, latin-iso8859-1 and
Encodings of un-representable Unicode characters are decoded asis into
eight-bit-control and eight-bit-graphic characters.")
+(define-ccl-program ccl-mule-utf-8-encode-untrans
+ ;; UTF-8 decoder generates an UTF-8 sequence represented by a
+ ;; sequence eight-bit-control/graphic chars for an untranslatable
+ ;; character and an invalid byte.
+ ;;
+ ;; This CCL parses that sequence (the first byte is already in r1),
+ ;; writes out the original bytes of that sequence, and sets r5 to
+ ;; -1.
+ ;;
+ ;; If the eight-bit-control/graphic sequence is shorter than what r1
+ ;; suggests, it sets r5 and r6 to the last character read that
+ ;; should be handled by the next loop of a caller.
+ ;;
+ ;; Note: For UTF-8 validation, we only check if a character is
+ ;; eight-bit-control/graphic or not. It may result in incorrect
+ ;; handling of random binary data, but such a data can't be encoded
+ ;; by UTF-8 anyway. At least, UTF-8 decoders doesn't generate such
+ ;; a sequence even if a source contains invalid byte-sequence.
+ `(0
+ (;; Read the 2nd byte.
+ (read-multibyte-character r5 r6)
+ (r0 = (r5 != ,(charset-id 'eight-bit-control)))
+ (if ((r5 != ,(charset-id 'eight-bit-graphic)) & r0)
+ ((write r1) ; invalid UTF-8
+ (r1 = -1)
+ (end)))
+
+ (if (r1 <= #xC3)
+ ;; 2-byte sequence for an originally invalid byte.
+ ((r6 &= #x3F)
+ (r6 |= ((r1 & #x1F) << 6))
+ (write r6)
+ (r5 = -1)
+ (end)))
+
+ (write r1 r6)
+ (r2 = r1)
+ (r1 = -1)
+ ;; Read the 3rd byte.
+ (read-multibyte-character r5 r6)
+ (r0 = (r5 != ,(charset-id 'eight-bit-control)))
+ (if ((r5 != ,(charset-id 'eight-bit-graphic)) & r0)
+ (end)) ; invalid UTF-8
+ (write r6)
+ (if (r2 < #xF0)
+ ;; 3-byte sequence for an untranslated character.
+ ((r5 = -1)
+ (end)))
+ ;; Read the 4th byte.
+ (read-multibyte-character r5 r6)
+ (r0 = (r5 != ,(charset-id 'eight-bit-control)))
+ (if ((r5 != ,(charset-id 'eight-bit-graphic)) & r0)
+ (end)) ; invalid UTF-8
+ ;; 4-byte sequence for an untranslated character.
+ (write r6)
+ (r5 = -1)
+ (end))
+
+ ;; At EOF...
+ ((r5 = -1)
+ (if (r1 >= 0)
+ (write r1)))))
+
(define-ccl-program ccl-encode-mule-utf-8
`(1
((r5 = -1)
(loop
(if (r5 < 0)
- ((r1 = -1)
- (read-multibyte-character r0 r1)
- (translate-character utf-translation-table-for-encode r0 r1))
- (;; We have already done read-multibyte-character.
- (r0 = r5)
+ (read-multibyte-character r0 r1)
+ ;; Pre-read character is in r5 (charset-ID) and r6 (code-point).
+ ((r0 = r5)
(r1 = r6)
(r5 = -1)))
+ (translate-character utf-translation-table-for-encode r0 r1)
(if (r0 == ,(charset-id 'ascii))
- (write r1)
-
- (if (r0 == ,(charset-id 'latin-iso8859-1))
- ;; r1 scalar utf-8
- ;; 0000 0yyy yyxx xxxx 110y yyyy 10xx xxxx
- ;; 20 0000 0000 1010 0000 1100 0010 1010 0000
- ;; 7f 0000 0000 1111 1111 1100 0011 1011 1111
- ((r0 = (((r1 & #x40) >> 6) | #xc2))
- (r1 &= #x3f)
+ (write-repeat r1))
+
+ (if (r0 == ,(charset-id 'latin-iso8859-1))
+ ;; r1 scalar utf-8
+ ;; 0000 0yyy yyxx xxxx 110y yyyy 10xx xxxx
+ ;; 20 0000 0000 1010 0000 1100 0010 1010 0000
+ ;; 7f 0000 0000 1111 1111 1100 0011 1011 1111
+ ((r0 = (((r1 & #x40) >> 6) | #xc2))
+ (r1 &= #x3f)
+ (r1 |= #x80)
+ (write r0)
+ (write-repeat r1)))
+
+ (if (r0 == ,(charset-id 'mule-unicode-0100-24ff))
+ ((r0 = ((((r1 & #x3f80) >> 7) - 32) * 96))
+ ;; #x3f80 == (0011 1111 1000 0000)b
+ (r1 &= #x7f)
+ (r1 += (r0 + 224)) ; 240 == -32 + #x0100
+ ;; now r1 holds scalar value
+ (if (r1 < #x0800)
+ ;; 2byte encoding
+ ((write ((r1 >> 6) | #xC0))
+ (r1 &= #x3F)
+ (r1 |= #x80)
+ (write-repeat r1))
+ ;; 3byte encoding
+ ((write ((r1 >> 12) | #xE0))
+ (write (((r1 & #x0FC0) >> 6) | #x80))
+ (r1 &= #x3F)
+ (r1 |= #x80)
+ (write-repeat r1)))))
+
+ (if (r0 == ,(charset-id 'mule-unicode-2500-33ff))
+ ((r0 = ((((r1 & #x3f80) >> 7) - 32) * 96))
+ (r1 &= #x7f)
+ (r1 += (r0 + 9440)) ; 9440 == -32 + #x2500
+ ;; now r1 holds scalar value
+ (write ((r1 >> 12) | #xE0))
+ (write (((r1 & #x0FC0) >> 6) | #x80))
+ (r1 &= #x3F)
+ (r1 |= #x80)
+ (write-repeat r1)))
+
+ (if (r0 == ,(charset-id 'mule-unicode-e000-ffff))
+ ((r0 = ((((r1 & #x3f80) >> 7) - 32) * 96))
+ (r1 &= #x7f)
+ (r1 += (r0 + 57312)) ; 57312 == -32 + #xe000
+ ;; now r1 holds scalar value
+ (write ((r1 >> 12) | #xE0))
+ (write (((r1 & #x0FC0) >> 6) | #x80))
+ (r1 &= #x3F)
+ (r1 |= #x80)
+ (write-repeat r1)))
+
+ (if (r0 == ,(charset-id 'eight-bit-control))
+ ;; r1 scalar utf-8
+ ;; 0000 0yyy yyxx xxxx 110y yyyy 10xx xxxx
+ ;; 80 0000 0000 1000 0000 1100 0010 1000 0000
+ ;; 9f 0000 0000 1001 1111 1100 0010 1001 1111
+ ((write #xC2)
+ (write-repeat r1)))
+
+ (if (r0 == ,(charset-id 'eight-bit-graphic))
+ ;; r1 scalar utf-8
+ ;; 0000 0yyy yyxx xxxx 110y yyyy 10xx xxxx
+ ;; a0 0000 0000 1010 0000 1100 0010 1010 0000
+ ;; ff 0000 0000 1111 1111 1101 1111 1011 1111
+ ((r0 = (r1 >= #xC0))
+ (r0 &= (r1 <= #xC3))
+ (r4 = (r1 >= #xE1))
+ (r4 &= (r1 <= #xF7))
+ (r0 |= r4)
+ (if r0
+ ((call ccl-mule-utf-8-encode-untrans)
+ (repeat))
+ (write-repeat r1))))
+
+ (lookup-character utf-subst-table-for-encode r0 r1)
+ (if r7 ; lookup succeeded
+ (if (r0 < #x800)
+ ;; 2byte encoding
+ ((write ((r0 >> 6) | #xC0))
+ (r1 &= #x3F)
+ (r1 |= #x80)
+ (write-repeat r1))
+ ;; 3byte encoding
+ ((write ((r0 >> 12) | #xE0))
+ (write (((r0 & #x0FC0) >> 6) | #x80))
+ (r1 &= #x3F)
(r1 |= #x80)
- (write r0 r1))
-
- (if (r0 == ,(charset-id 'mule-unicode-0100-24ff))
- ((r0 = ((((r1 & #x3f80) >> 7) - 32) * 96))
- ;; #x3f80 == (0011 1111 1000 0000)b
- (r1 &= #x7f)
- (r1 += (r0 + 224)) ; 240 == -32 + #x0100
- ;; now r1 holds scalar value
- (if (r1 < #x0800)
- ;; 2byte encoding
- ((r0 = (((r1 & #x07c0) >> 6) | #xc0))
- ;; #x07c0 == (0000 0111 1100 0000)b
- (r1 &= #x3f)
- (r1 |= #x80)
- (write r0 r1))
- ;; 3byte encoding
- ((r0 = (((r1 & #xf000) >> 12) | #xe0))
- (r2 = ((r1 & #x3f) | #x80))
- (r1 &= #x0fc0)
- (r1 >>= 6)
- (r1 |= #x80)
- (write r0 r1 r2))))
-
- (if (r0 == ,(charset-id 'mule-unicode-2500-33ff))
- ((r0 = ((((r1 & #x3f80) >> 7) - 32) * 96))
- (r1 &= #x7f)
- (r1 += (r0 + 9440)) ; 9440 == -32 + #x2500
- (r0 = (((r1 & #xf000) >> 12) | #xe0))
- (r2 = ((r1 & #x3f) | #x80))
- (r1 &= #x0fc0)
- (r1 >>= 6)
- (r1 |= #x80)
- (write r0 r1 r2))
-
- (if (r0 == ,(charset-id 'mule-unicode-e000-ffff))
- ((r0 = ((((r1 & #x3f80) >> 7) - 32) * 96))
- (r1 &= #x7f)
- (r1 += (r0 + 57312)) ; 57312 == -32 + #xe000
- (r0 = (((r1 & #xf000) >> 12) | #xe0))
- (r2 = ((r1 & #x3f) | #x80))
- (r1 &= #x0fc0)
- (r1 >>= 6)
- (r1 |= #x80)
- (write r0 r1 r2))
-
- (if (r0 == ,(charset-id 'eight-bit-control))
- ;; r1 scalar utf-8
- ;; 0000 0yyy yyxx xxxx 110y yyyy 10xx xxxx
- ;; 80 0000 0000 1000 0000 1100 0010 1000 0000
- ;; 9f 0000 0000 1001 1111 1100 0010 1001 1111
- ((write #xc2)
- (write r1))
-
- (if (r0 == ,(charset-id 'eight-bit-graphic))
- ;; r1 scalar utf-8
- ;; 0000 0yyy yyxx xxxx 110y yyyy 10xx xxxx
- ;; a0 0000 0000 1010 0000 1100 0010 1010 0000
- ;; ff 0000 0000 1111 1111 1101 1111 1011 1111
- ((write r1)
- (r1 = -1)
- (read-multibyte-character r0 r1)
- (if (r0 != ,(charset-id 'eight-bit-graphic))
- (if (r0 != ,(charset-id 'eight-bit-control))
- ((r5 = r0)
- (r6 = r1))))
- (if (r5 < 0)
- ((read-multibyte-character r0 r2)
- (if (r0 != ,(charset-id 'eight-bit-graphic))
- (if (r0 != ,(charset-id 'eight-bit-control))
- ((r5 = r0)
- (r6 = r2))))
- (if (r5 < 0)
- (write r1 r2)
- (if (r1 < #xa0)
- (write r1)
- ((write #xc2)
- (write r1)))))))
-
- ((lookup-character utf-subst-table-for-encode r0 r1)
- (if r7 ; lookup succeeded
- ((r1 = (((r0 & #xf000) >> 12) | #xe0))
- (r2 = ((r0 & #x3f) | #x80))
- (r0 &= #x0fc0)
- (r0 >>= 6)
- (r0 |= #x80)
- (write r1 r0 r2))
- ;; Unsupported character.
- ;; Output U+FFFD, which is `ef bf bd' in UTF-8.
- ((write #xef)
- (write #xbf)
- (write #xbd)))))))))))
- (repeat)))
- (if (r1 >= #xa0)
- (write r1)
- (if (r1 >= #x80)
- ((write #xc2)
- (write r1)))))
+ (write-repeat r1))))
+ ;; Unsupported character.
+ ;; Output U+FFFD, which is `ef bf bd' in UTF-8.
+ (write #xef)
+ (write #xbf)
+ (write-repeat #xbd))))
"CCL program to encode into UTF-8.")
(define-ccl-program ccl-untranslated-to-ucs
`(0
- (if (r0 < #xf0) ; 3-byte encoding, as above
- ((r4 = 0)
- (r3 = (r1 & #b11000000))
- (r3 |= ((r2 >> 2) & #b00110000))
- (if (r3 != #b10100000)
- (r4 = 1)
- ((r3 = ((r0 & #x0f) << 12))
- (r3 += ((r1 & #x3f) << 6))
- (r3 += (r2 & #x3f))
- (if (r3 < #x0800)
- (r4 = 1))))
- (if (r4 != 0)
- (r0 = 0)
- (r0 = r3)))
- (if (r0 < #xf8) ; 4-byte (Mule-UCS recipe)
- ((r4 = (r1 >> 6))
- (if (r4 != #b10)
- (r0 = 0)
- ((r4 = (r2 >> 6))
- (if (r4 != #b10)
- (r0 = 0)
- ((r4 = (r3 >> 6))
- (if (r4 != #b10)
- (r0 = 0)
- ((r1 = ((r1 & #x3F) << 12))
- (r2 = ((r2 & #x3F) << 6))
- (r3 &= #x3F)
- (r0 = (((((r0 & #x07) << 18) | r1) | r2) | r3)))))))))
- (r0 = 0))))
- "Decode 3- or 4-byte sequences in r0, r1, r2 [,r3] to unicodes in r0.
-r0 == 0 for invalid sequence.")
+ (if (r1 == 0)
+ nil
+ (if (r0 <= #xC3) ; 2-byte encoding
+ ((r0 = ((r0 & #x3) << 6))
+ (r0 |= (r1 & #x3F))
+ (r1 = 2))
+ (if (r2 == 0)
+ (r1 = 0)
+ (if (r0 < #xF0) ; 3-byte encoding, as above
+ ((r0 = ((r0 & #xF) << 12))
+ (r0 |= ((r1 & #x3F) << 6))
+ (r0 |= (r1 & #x3F))
+ (r1 = 3))
+ (if (r3 == 0)
+ (r1 = 0)
+ ((r0 = ((r0 & #x7) << 18))
+ (r0 |= ((r1 & #x3F) << 12))
+ (r0 |= ((r2 & #x3F) << 6))
+ (r0 |= (r3 & #x3F))
+ (r1 = 4))))))))
+ "Decode 2-, 3-, or 4-byte sequences in r0, r1, r2 [,r3] to unicodes in r0.
+Set r1 to the byte length. r0 == 0 for invalid sequence.")
(defvar utf-8-ccl-regs (make-vector 8 0))
(aset utf-8-ccl-regs 1 (or (char-after (1+ (point))) 0))
(aset utf-8-ccl-regs 2 (or (char-after (+ 2 (point))) 0))
(aset utf-8-ccl-regs 3 (or (char-after (+ 3 (point))) 0))
- (ccl-execute 'ccl-untranslated-to-ucs utf-8-ccl-regs)
- (aref utf-8-ccl-regs 0))
+ (ccl-execute 'ccl-untranslated-to-ucs utf-8-ccl-regs))
(defun utf-8-help-echo (window object position)
(format "Untranslated Unicode U+%04X"
(get-char-property position 'untranslated-utf-8 object)))
-;; We compose the untranslatable sequences into a single character.
+;; We compose the untranslatable sequences into a single character,
+;; and move point to the next character.
;; This is infelicitous for editing, because there's currently no
;; mechanism for treating compositions as atomic, but is OK for
;; display. They are composed to U+FFFD with help-echo which
;; indicates the unicodes they represent. This function GCs too much.
-(defsubst utf-8-compose ()
- "Put a suitable composition on an untranslatable sequence.
-Return the sequence's length."
- (let* ((u (utf-8-untranslated-to-ucs))
- (l (unless (zerop u)
- (if (>= u #x10000)
- 4
- 3))))
- (when l
- (put-text-property (point) (min (point-max) (+ l (point)))
- 'untranslated-utf-8 u)
- (put-text-property (point) (min (point-max) (+ l (point)))
- 'help-echo 'utf-8-help-echo)
- (compose-region (point) (+ l (point)) ?\e$,3u=\e(B)
- l)))
+
+;; If utf-translate-cjk-mode is non-nil, this function is called with
+;; HASH-TABLE which translates CJK characters into some of CJK
+;; charsets.
+
+(defsubst utf-8-compose (hash-table)
+ "Put a suitable composition on an untranslatable sequence at point.
+If HASH-TABLE is non-nil, try to translate CJK characters by it at first.
+Move point to the end of the sequence."
+ (utf-8-untranslated-to-ucs)
+ (let ((l (aref utf-8-ccl-regs 1))
+ ch)
+ (if (> l 0)
+ (if (and hash-table
+ (setq ch (gethash (aref utf-8-ccl-regs 0) hash-table)))
+ (progn
+ (insert ch)
+ (delete-region (point) (min (point-max) (+ l (point)))))
+ (setq ch (aref utf-8-ccl-regs 0))
+ (put-text-property (point) (min (point-max) (+ l (point)))
+ 'untranslated-utf-8 ch)
+ (put-text-property (point) (min (point-max) (+ l (point)))
+ 'help-echo 'utf-8-help-echo)
+ (if (= l 2)
+ (put-text-property (point) (min (point-max) (+ l (point)))
+ 'display (format "\\%03o" ch))
+ (compose-region (point) (+ l (point)) ?\e$,3u=\e(B))
+ (forward-char l))
+ (forward-char 1))))
(defcustom utf-8-compose-scripts nil
"*Non-nil means compose various scripts on decoding utf-8 text."
(defun utf-8-post-read-conversion (length)
"Compose untranslated utf-8 sequences into single characters.
+If `utf-translate-cjk-mode' is non-nil, tries to translate CJK characters.
Also compose particular scripts if `utf-8-compose-scripts' is non-nil."
(save-excursion
- ;; Can't do eval-when-compile to insert a multibyte constant
- ;; version of the string in the loop, since it's always loaded as
- ;; unibyte from a byte-compiled file.
- (let ((range (string-as-multibyte "^\xe1-\xf7")))
- (while (and (skip-chars-forward range)
- (not (eobp)))
- (forward-char (utf-8-compose)))))
- ;; Fixme: Takahashi-san implies it may not work this easily. I
- ;; asked why but didn't get a reply. -- fx
- (when (and utf-8-compose-scripts (> length 1))
- ;; These currently have definitions which cover the relevant
- ;; unicodes. We could avoid loading thai-util &c by checking
- ;; whether the region contains any characters with the appropriate
- ;; categories. There aren't yet Unicode-based rules for Tibetan.
- (save-excursion (setq length (diacritic-post-read-conversion length)))
- (save-excursion (setq length (thai-post-read-conversion length)))
- (save-excursion (setq length (lao-post-read-conversion length)))
- (save-excursion (setq length (devanagari-post-read-conversion length)))
- (save-excursion (setq length (malayalam-post-read-conversion length)))
- (save-excursion (setq length (tamil-post-read-conversion length))))
- length)
-
-;; ucs-tables is preloaded
-;; (defun utf-8-pre-write-conversion (beg end)
-;; "Semi-dummy pre-write function effectively to autoload ucs-tables."
-;; ;; Ensure translation-table is loaded.
-;; (require 'ucs-tables)
-;; ;; Don't do this again.
-;; (coding-system-put 'mule-utf-8 'pre-write-conversion nil)
-;; nil)
+ (save-restriction
+ (narrow-to-region (point) (+ (point) length))
+ ;; Can't do eval-when-compile to insert a multibyte constant
+ ;; version of the string in the loop, since it's always loaded as
+ ;; unibyte from a byte-compiled file.
+ (let ((range (string-as-multibyte "^\xc0-\xc3\xe1-\xf7"))
+ hash-table ch)
+ (when utf-translate-cjk-mode
+ (if (not utf-translate-cjk-lang-env)
+ ;; Check these characters:
+ ;; "U+2e80-U+33ff", "U+ff00-U+ffef"
+ ;; We may have to translate them to CJK charsets.
+ (let ((range2 "\e$,29@\e(B-\e$,2G\7f\e$,3r`\e(B-\e$,3u/\e(B"))
+ (skip-chars-forward (concat range range2))
+ (unless (eobp)
+ (utf-translate-cjk-load-tables)
+ (setq range (concat range range2)))
+ (setq hash-table (get 'utf-subst-table-for-decode
+ 'translation-hash-table)))))
+ (while (and (skip-chars-forward range)
+ (not (eobp)))
+ (setq ch (following-char))
+ (if (< ch 256)
+ (utf-8-compose hash-table)
+ (if (and hash-table
+ (setq ch (gethash (encode-char ch 'ucs) hash-table)))
+ (progn
+ (insert ch)
+ (delete-char 1))
+ (forward-char 1)))))
+
+ (when (and utf-8-compose-scripts (> length 1))
+ ;; These currently have definitions which cover the relevant
+ ;; unicodes. We could avoid loading thai-util &c by checking
+ ;; whether the region contains any characters with the appropriate
+ ;; categories. There aren't yet Unicode-based rules for Tibetan.
+ (diacritic-compose-region (point-max) (point-min))
+ (thai-compose-region (point-max) (point-min))
+ (lao-compose-region (point-max) (point-min))
+ (devanagari-compose-region (point-max) (point-min))
+ (malayalam-compose-region (point-max) (point-min))
+ (tamil-compose-region (point-max) (point-min)))
+ (- (point-max) (point-min)))))
+
+(defun utf-8-pre-write-conversion (beg end)
+ "Prepare for `utf-translate-cjk-mode' to encode text between BEG and END.
+This is used as a post-read-conversion of utf-8 coding system."
+ (if (and utf-translate-cjk-mode
+ (not utf-translate-cjk-lang-env)
+ (save-excursion
+ (goto-char beg)
+ (re-search-forward "\\cc\\|\\cj\\|\\ch" end t)))
+ (utf-translate-cjk-load-tables))
+ nil)
(make-coding-system
'mule-utf-8 4 ?u
sequence representing U+FFFD (REPLACEMENT CHARACTER)."
'(ccl-decode-mule-utf-8 . ccl-encode-mule-utf-8)
- '((safe-charsets
+ `((safe-charsets
ascii
eight-bit-control
eight-bit-graphic
latin-iso8859-1
mule-unicode-0100-24ff
mule-unicode-2500-33ff
- mule-unicode-e000-ffff)
+ mule-unicode-e000-ffff
+ ,@(if utf-translate-cjk-mode
+ utf-translate-cjk-charsets))
(mime-charset . utf-8)
(coding-category . coding-category-utf-8)
(valid-codes (0 . 255))
-;; (pre-write-conversion . utf-8-pre-write-conversion)
+ (pre-write-conversion . utf-8-pre-write-conversion)
(post-read-conversion . utf-8-post-read-conversion)
(translation-table-for-encode . utf-translation-table-for-encode)
(dependency unify-8859-on-encoding-mode
projects / emacs.git / commitdiff