;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
;; Licensed to the Free Software Foundation.
-;; Copyright (C) 2001 Free Software Foundation, Inc.
+;; Copyright (C) 2001, 2002 Free Software Foundation, Inc.
;; Keywords: mule, multilingual, character set, coding system
(message "Loading %s (source)..." file)
(message "Loading %s..." file)))
(when purify-flag
- (setq preloaded-file-list (cons file preloaded-file-list)))
+ (push file preloaded-file-list))
(unwind-protect
(let ((load-file-name fullname)
(set-auto-coding-for-load t)
"Return character specified by coded character set CCS and CODE-POINT in it.
Return nil if such a character is not supported.
Currently the only supported coded character set is `ucs' (ISO/IEC
-10646: Universal Multi-Octet Coded Character Set).
+10646: Universal Multi-Octet Coded Character Set), and the result is
+translated through the translation-table named
+`utf-translation-table-for-decode' or the translation-hash-table named
+`utf-subst-table-for-decode'.
Optional argument RESTRICTION specifies a way to map the pair of CCS
-and CODE-POINT to a character. Currently not supported and just ignored."
- (cond ((eq ccs 'ucs)
- (cond ((< code-point 160)
- code-point)
- ((< code-point 256)
- (make-char 'latin-iso8859-1 code-point))
- ((< code-point #x2500)
- (setq code-point (- code-point #x0100))
- (make-char 'mule-unicode-0100-24ff
- (+ (/ code-point 96) 32) (+ (% code-point 96) 32)))
- ((< code-point #x3400)
- (setq code-point (- code-point #x2500))
- (make-char 'mule-unicode-2500-33ff
- (+ (/ code-point 96) 32) (+ (% code-point 96) 32)))
- ((and (>= code-point #xe000) (< code-point #x10000))
- (setq code-point (- code-point #xe000))
- (make-char 'mule-unicode-e000-ffff
- (+ (/ code-point 96) 32) (+ (% code-point 96) 32)))
- ))))
+and CODE-POINT to a character. Currently not supported and just ignored."
+ (cond
+ ((eq ccs 'ucs)
+ (or (gethash code-point
+ (get 'utf-subst-table-for-decode 'translation-hash-table))
+ (let ((c (cond
+ ((< code-point 160)
+ code-point)
+ ((< code-point 256)
+ (make-char 'latin-iso8859-1 code-point))
+ ((< code-point #x2500)
+ (setq code-point (- code-point #x0100))
+ (make-char 'mule-unicode-0100-24ff
+ (+ (/ code-point 96) 32) (+ (% code-point 96) 32)))
+ ((< code-point #x3400)
+ (setq code-point (- code-point #x2500))
+ (make-char 'mule-unicode-2500-33ff
+ (+ (/ code-point 96) 32) (+ (% code-point 96) 32)))
+ ((and (>= code-point #xe000) (< code-point #x10000))
+ (setq code-point (- code-point #xe000))
+ (make-char 'mule-unicode-e000-ffff
+ (+ (/ code-point 96) 32)
+ (+ (% code-point 96) 32))))))
+ (when c
+ (or (aref (get 'utf-translation-table-for-decode
+ 'translation-table) c)
+ c)))))))
(defun encode-char (char ccs &optional restriction)
"Return code-point in coded character set CCS that corresponds to CHAR.
Return nil if CHAR is not included in CCS.
Currently the only supported coded character set is `ucs' (ISO/IEC
-10646: Universal Multi-Octet Coded Character Set).
+10646: Universal Multi-Octet Coded Character Set), and CHAR is first
+translated through the translation-table named
+`utf-translation-table-for-encode' or the translation-hash-table named
+`utf-subst-table-for-encode'.
CHAR should be in one of these charsets:
ascii, latin-iso8859-1, mule-unicode-0100-24ff, mule-unicode-2500-33ff,
Optional argument RESTRICTION specifies a way to map CHAR to a
code-point in CCS. Currently not supported and just ignored."
(let* ((split (split-char char))
- (charset (car split)))
+ (charset (car split))
+ trans)
(cond ((eq ccs 'ucs)
- (cond ((eq charset 'ascii)
- char)
- ((eq charset 'latin-iso8859-1)
- (+ (nth 1 split) 128))
- ((eq charset 'mule-unicode-0100-24ff)
- (+ #x0100 (+ (* (- (nth 1 split) 32) 96)
- (- (nth 2 split) 32))))
- ((eq charset 'mule-unicode-2500-33ff)
- (+ #x2500 (+ (* (- (nth 1 split) 32) 96)
- (- (nth 2 split) 32))))
- ((eq charset 'mule-unicode-e000-ffff)
- (+ #xe000 (+ (* (- (nth 1 split) 32) 96)
- (- (nth 2 split) 32))))
- ((eq charset 'eight-bit-control)
- char))))))
+ (or (gethash char (get 'utf-subst-table-for-encode
+ 'translation-hash-table))
+ (let ((table (get 'utf-translation-table-for-encode
+ 'translation-table)))
+ (setq trans (aref table char))
+ (if trans
+ (setq split (split-char trans)
+ charset (car split)))
+ (cond ((eq charset 'ascii)
+ (or trans char))
+ ((eq charset 'latin-iso8859-1)
+ (+ (nth 1 split) 128))
+ ((eq charset 'mule-unicode-0100-24ff)
+ (+ #x0100 (+ (* (- (nth 1 split) 32) 96)
+ (- (nth 2 split) 32))))
+ ((eq charset 'mule-unicode-2500-33ff)
+ (+ #x2500 (+ (* (- (nth 1 split) 32) 96)
+ (- (nth 2 split) 32))))
+ ((eq charset 'mule-unicode-e000-ffff)
+ (+ #xe000 (+ (* (- (nth 1 split) 32) 96)
+ (- (nth 2 split) 32))))
+ ((eq charset 'eight-bit-control)
+ char))))))))
\f
;; Coding system stuff
coding system whose eol-type is N."
(get coding-system 'eol-type))
+(defun coding-system-eol-type-mnemonic (coding-system)
+ "Return the string indicating end-of-line format of CODING-SYSTEM."
+ (let* ((eol-type (coding-system-eol-type coding-system))
+ (val (cond ((eq eol-type 0) eol-mnemonic-unix)
+ ((eq eol-type 1) eol-mnemonic-dos)
+ ((eq eol-type 2) eol-mnemonic-mac)
+ (t eol-mnemonic-undecided))))
+ (if (stringp val)
+ val
+ (char-to-string val))))
+
(defun coding-system-lessp (x y)
(cond ((eq x 'no-conversion) t)
((eq y 'no-conversion) nil)
(make-char charset (+ i start) (+ start chars -1)))))))
(defun register-char-codings (coding-system safe-chars)
- "Add entries for CODING-SYSTEM to `char-coding-system-table'.
-If SAFE-CHARS is a char-table, its non-nil entries specify characters
-which CODING-SYSTEM encodes safely. If SAFE-CHARS is t, register
-CODING-SYSTEM as a general one which can encode all characters."
- (let ((general (char-table-extra-slot char-coding-system-table 0))
- ;; Charsets which have some members in the table, but not all
- ;; of them (i.e. not just a generic character):
- (partials (char-table-extra-slot char-coding-system-table 1)))
- (if (eq safe-chars t)
- (or (memq coding-system general)
- (set-char-table-extra-slot char-coding-system-table 0
- (cons coding-system general)))
- (map-char-table
- (lambda (key val)
- (if (and (>= key 128) val)
- (let ((codings (aref char-coding-system-table key))
- (charset (char-charset key)))
- (unless (memq coding-system codings)
- (if (and (generic-char-p key)
- (memq charset partials))
- ;; The generic char would clobber individual
- ;; entries already in the table. First save the
- ;; separate existing entries for all chars of the
- ;; charset (with the generic entry added, if
- ;; necessary).
- (let (entry existing)
- (map-charset-chars
- (lambda (start end)
- (while (<= start end)
- (setq entry (aref char-coding-system-table start))
- (when entry
- (push (cons
- start
- (if (memq coding-system entry)
- entry
- (cons coding-system entry)))
- existing))
- (setq start (1+ start))))
- charset)
- ;; Update the generic entry.
- (aset char-coding-system-table key
- (cons coding-system codings))
- ;; Override with the saved entries.
- (dolist (elt existing)
- (aset char-coding-system-table (car elt) (cdr elt))))
- (aset char-coding-system-table key
- (cons coding-system codings))
- (unless (or (memq charset partials)
- (generic-char-p key))
- (push charset partials)))))))
- safe-chars)
- (set-char-table-extra-slot char-coding-system-table 1 partials))))
+ "This is an obsolete function.
+It exists just for backward compatibility, and it does nothing.")
+(make-obsolete 'register-char-codings
+ "Unnecessary function. Calling it has no effect."
+ "21.3")
+(defconst char-coding-system-table nil
+ "This is an obsolete variable.
+It exists just for backward compatibility, and the value is always nil.")
(defun make-subsidiary-coding-system (coding-system)
"Make subsidiary coding systems (eol-type variants) of CODING-SYSTEM."
TYPE is an integer value indicating the type of the coding system as follows:
0: Emacs internal format,
- 1: Shift-JIS (or MS-Kanji) used mainly on Japanese PC,
+ 1: Shift-JIS (or MS-Kanji) used mainly on Japanese PCs,
2: ISO-2022 including many variants,
- 3: Big5 used mainly on Chinese PC,
+ 3: Big5 used mainly on Chinese PCs,
4: private, CCL programs provide encoding/decoding algorithm,
5: Raw-text, which means that text contains random 8-bit codes.
following properties are recognized:
o post-read-conversion
-
+
The value is a function to call after some text is inserted and
decoded by the coding system itself and before any functions in
`after-insert-functions' are called. The argument of this
function is the same as for a function in
`after-insert-file-functions', i.e. LENGTH of the text inserted,
with point at the head of the text to be decoded.
-
+
o pre-write-conversion
-
+
The value is a function to call after all functions in
`write-region-annotate-functions' and `buffer-file-format' are
called, and before the text is encoded by the coding system itself.
The arguments to this function are the same as those of a function
in `write-region-annotate-functions', i.e. FROM and TO, specifying
a region of text.
-
+
o translation-table-for-decode
-
+
The value is a translation table to be applied on decoding. See
the function `make-translation-table' for the format of translation
table. This is not applicable to type 4 (CCL-based) coding systems.
-
+
o translation-table-for-encode
-
+
The value is a translation table to be applied on encoding. This is
not applicable to type 4 (CCL-based) coding systems.
-
+
o safe-chars
-
+
The value is a char table. If a character has non-nil value in it,
the character is safely supported by the coding system. This
overrides the specification of safe-charsets.
mean that the charset can't be encoded in the coding system;
it just means that some other receiver of text encoded
in the coding system won't be able to handle that charset.
-
+
o mime-charset
-
- The value is a symbol of which name is `MIME-charset' parameter of
+
+ The value is a symbol whose name is the `MIME-charset' parameter of
the coding system.
-
+
+ o mime-text-unsuitable
+
+ A non-nil value means the `mime-charset' property names a charset
+ which is unsuitable for the top-level media type \"text\".
+
o valid-codes (meaningful only for a coding system based on CCL)
-
+
The value is a list to indicate valid byte ranges of the encoded
file. Each element of the list is an integer or a cons of integer.
In the former case, the integer value is a valid byte code. In the
latter case, the integers specify the range of valid byte codes.
+ o composition (meaningful only when TYPE is 0 or 2)
+
+ If the value is non-nil, the coding system preserves composition
+ information.
+
These properties are set in PLIST, a property list. This function
also sets properties `coding-category' and `alias-coding-systems'
automatically.
(if (and (symbolp val)
(get val 'translation-table))
(setq safe-chars (get val 'translation-table)))
- (register-char-codings coding-system safe-chars)
(setq val safe-chars)))
(plist-put plist prop val)))
;; The property `coding-category' may have been set differently
(error "Invalid EOL-TYPE spec:%S" eol-type))))
(put coding-system 'eol-type eol-type)
+ (define-coding-system-internal coding-system)
+
;; At last, register CODING-SYSTEM in `coding-system-list' and
;; `coding-system-alist'.
(add-to-coding-system-list coding-system)
coding-system)
+(put 'safe-chars 'char-table-extra-slots 0)
+
(defun define-coding-system-alias (alias coding-system)
"Define ALIAS as an alias for coding system CODING-SYSTEM."
(put alias 'coding-system (coding-system-spec coding-system))
- (nconc (coding-system-get alias 'alias-coding-systems) (list alias))
(add-to-coding-system-list alias)
(setq coding-system-alist (cons (list (symbol-name alias))
coding-system-alist))
(let ((eol-type (coding-system-eol-type coding-system)))
(if (vectorp eol-type)
- (put alias 'eol-type (make-subsidiary-coding-system alias))
+ (progn
+ (nconc (coding-system-get alias 'alias-coding-systems) (list alias))
+ (put alias 'eol-type (make-subsidiary-coding-system alias)))
(put alias 'eol-type eol-type))))
+(defun merge-coding-systems (first second)
+ "Fill in any unspecified aspects of coding system FIRST from SECOND.
+Return the resulting coding system."
+ (let ((base (coding-system-base second))
+ (eol (coding-system-eol-type second)))
+ ;; If FIRST doesn't specify text conversion, merge with that of SECOND.
+ (if (eq (coding-system-base first) 'undecided)
+ (setq first (coding-system-change-text-conversion first base)))
+ ;; If FIRST doesn't specify eol conversion, merge with that of SECOND.
+ (if (and (vectorp (coding-system-eol-type first))
+ (numberp eol) (>= eol 0) (<= eol 2))
+ (setq first (coding-system-change-eol-conversion
+ first eol)))
+ first))
+
(defun set-buffer-file-coding-system (coding-system &optional force)
"Set the file coding-system of the current buffer to CODING-SYSTEM.
This means that when you save the buffer, it will be converted
according to CODING-SYSTEM. For a list of possible values of CODING-SYSTEM,
use \\[list-coding-systems].
-If the buffer's previous file coding-system value specifies end-of-line
-conversion, and CODING-SYSTEM does not specify one, CODING-SYSTEM is
-merged with the already-specified end-of-line conversion.
-
-If the buffer's previous file coding-system value specifies text
-conversion, and CODING-SYSTEM does not specify one, CODING-SYSTEM is
-merged with the already-specified text conversion.
-
-However, if the optional prefix argument FORCE is non-nil, then
-CODING-SYSTEM is used exactly as specified.
+If CODING-SYSTEM leaves the text conversion unspecified, or if it
+leaves the end-of-line conversion unspecified, FORCE controls what to
+do. If FORCE is nil, get the unspecified aspect (or aspects) from the
+buffer's previous `buffer-file-coding-system' value (if it is
+specified there). Otherwise, leave it unspecified.
This marks the buffer modified so that the succeeding \\[save-buffer]
surely saves the buffer with CODING-SYSTEM. From a program, if you
don't want to mark the buffer modified, just set the variable
`buffer-file-coding-system' directly."
- (interactive "zCoding system for visited file (default, nil): \nP")
+ (interactive "zCoding system for saving file (default, nil): \nP")
(check-coding-system coding-system)
(if (and coding-system buffer-file-coding-system (null force))
- (let ((base (coding-system-base buffer-file-coding-system))
- (eol (coding-system-eol-type buffer-file-coding-system)))
- ;; If CODING-SYSTEM doesn't specify text conversion, merge
- ;; with that of buffer-file-coding-system.
- (if (eq (coding-system-base coding-system) 'undecided)
- (setq coding-system (coding-system-change-text-conversion
- coding-system base)))
- ;; If CODING-SYSTEM doesn't specify eol conversion, merge with
- ;; that of buffer-file-coding-system.
- (if (and (vectorp (coding-system-eol-type coding-system))
- (numberp eol) (>= eol 0) (<= eol 2))
- (setq coding-system (coding-system-change-eol-conversion
- coding-system eol)))))
+ (setq coding-system
+ (merge-coding-systems coding-system buffer-file-coding-system)))
(setq buffer-file-coding-system coding-system)
+ ;; This is in case of an explicit call. Normally, `normal-mode' and
+ ;; `set-buffer-major-mode-hook' take care of setting the table.
+ (if (fboundp 'ucs-set-table-for-input) ; don't lose when building
+ (ucs-set-table-for-input))
(set-buffer-modified-p t)
(force-mode-line-update))
+(defun revert-buffer-with-coding-system (coding-system &optional force)
+ "Visit the current buffer's file again using coding system CODING-SYSTEM.
+For a list of possible values of CODING-SYSTEM, use \\[list-coding-systems].
+
+If CODING-SYSTEM leaves the text conversion unspecified, or if it
+leaves the end-of-line conversion unspecified, FORCE controls what to
+do. If FORCE is nil, get the unspecified aspect (or aspects) from the
+buffer's previous `buffer-file-coding-system' value (if it is
+specified there). Otherwise, determine it from the file contents as
+usual for visiting a file."
+ (interactive "zCoding system for visited file (default, nil): \nP")
+ (check-coding-system coding-system)
+ (if (and coding-system buffer-file-coding-system (null force))
+ (setq coding-system
+ (merge-coding-systems coding-system buffer-file-coding-system)))
+ (let ((coding-system-for-read coding-system))
+ (revert-buffer)))
+
+(defun set-file-name-coding-system (coding-system)
+ "Set coding system for decoding and encoding file names to CODING-SYSTEM.
+It actually just set the variable `file-name-coding-system' (which
+see) to CODING-SYSTEM."
+ (interactive "zCoding system for file names (default, nil): ")
+ (check-coding-system coding-system)
+ (setq file-name-coding-system coding-system))
+
(defvar default-terminal-coding-system nil
"Default value for the terminal coding system.
This is normally set according to the selected language environment.
8-bit characters, you will have to use ESC to type Meta characters.
See Info node `Specify Coding' and Info node `Single-Byte Character Support'.
+On non-windowing terminals, this is set from the locale by default.
+
Setting this variable directly does not take effect;
use either M-x customize or \\[set-keyboard-coding-system]."
:type '(coding-system :tag "Coding system")
(if (or value (boundp 'encoded-kbd-mode))
(set-keyboard-coding-system value)
(set-default 'keyboard-coding-system nil))) ; must initialize
- :version "21.1"
+ :version "21.4"
:group 'keyboard
:group 'mule)
(defalias 'set-clipboard-coding-system 'set-selection-coding-system)
(defun set-selection-coding-system (coding-system)
- "Make CODING-SYSTEM used for communicating with other X clients .
+ "Make CODING-SYSTEM used for communicating with other X clients.
When sending or receiving text via cut_buffer, selection, and clipboard,
the text is encoded or decoded by CODING-SYSTEM."
(interactive "zCoding system for X selection: ")
(setq coding-category-list (append arg current-list))
(set-coding-priority-internal)))
+;;; X selections
+
+(defvar ctext-non-standard-encodings-alist
+ '(("ISO8859-15" . latin-iso8859-15)
+ ("ISO8859-14" . latin-iso8859-14)
+ ("KOI8-R" . koi8-r)
+ ("BIG5-0" . big5))
+ "Alist of non-standard encoding names vs Emacs coding systems.
+This alist is used to decode an extened segment of a compound text.")
+
+(defvar ctext-non-standard-encodings-regexp
+ (string-to-multibyte
+ (concat
+ ;; For non-standard encodings.
+ "\\(\e%/[0-4][\200-\377][\200-\377]\\([^\002]+\\)\002\\)"
+ "\\|"
+ ;; For UTF-8 encoding.
+ "\\(\e%G[^\e]*\e%@\\)")))
+
+;; Functions to support "Non-Standard Character Set Encodings" defined
+;; by the COMPOUND-TEXT spec.
+;; We support that by decoding the whole data by `ctext' which just
+;; pertains byte sequences belonging to ``extended segment'', then
+;; decoding those byte sequences one by one in Lisp.
+;; This function also supports "The UTF-8 encoding" described in the
+;; section 7 of the documentation fo COMPOUND-TEXT distributed with
+;; XFree86.
+
+(defun ctext-post-read-conversion (len)
+ "Decode LEN characters encoded as Compound Text with Extended Segments."
+ (save-match-data
+ (save-restriction
+ (let ((case-fold-search nil)
+ (in-workbuf (string= (buffer-name) " *code-converting-work*"))
+ last-coding-system-used
+ pos bytes)
+ (or in-workbuf
+ (narrow-to-region (point) (+ (point) len)))
+ (decode-coding-region (point-min) (point-max) 'ctext)
+ (if in-workbuf
+ (set-buffer-multibyte t))
+ (while (re-search-forward ctext-non-standard-encodings-regexp
+ nil 'move)
+ (setq pos (match-beginning 0))
+ (if (match-beginning 1)
+ ;; ESC % / [0-4] M L --ENCODING-NAME-- \002 --BYTES--
+ (let* ((M (char-after (+ pos 4)))
+ (L (char-after (+ pos 5)))
+ (encoding (match-string 2))
+ (coding (or (cdr (assoc-ignore-case
+ encoding
+ ctext-non-standard-encodings-alist))
+ (coding-system-p
+ (intern (downcase encoding))))))
+ (setq bytes (- (+ (* (- M 128) 128) (- L 128))
+ (- (point) (+ pos 6))))
+ (when coding
+ (delete-region pos (point))
+ (forward-char bytes)
+ (decode-coding-region (- (point) bytes) (point) coding)))
+ ;; ESC % G --UTF-8-BYTES-- ESC % @
+ (setq bytes (- (point) pos))
+ (decode-coding-region (- (point) bytes) (point) 'utf-8))))
+ (goto-char (point-min))
+ (- (point-max) (point)))))
+
+;; From X registry 2001/06/01
+;; 20. NON-STANDARD CHARACTER SET ENCODINGS
+
+;; See Section 6 of the Compound Text standard.
+
+;; Name Reference
+;; ---- ---------
+;; "DEC.CNS11643.1986-2" [53]
+;; CNS11643 2-plane using the recommended
+;; internal representation scheme
+;; "DEC.DTSCS.1990-2" [54]
+;; DEC Taiwan Supplemental Character Set
+;; "fujitsu.u90x03" [87]
+;; "ILA" [62]
+;; registry prefix
+;; "IPSYS" [59]
+;; registry prefix
+;; "omron_UDC" [45]
+;; omron User Defined Charset
+;; "omron_UDC_ja" [45]
+;; omron User Defined Charset for Japanese
+;; "omron_UDC_zh" [45]
+;; omron User Defined Charset for Chinese(Main land)
+;; "omron_UDC_tw" [45]
+;; omron User Defined Charset for Chinese(Taiwan)
+
+;; If you add charsets here, be sure to modify the regexp used by
+;; ctext-pre-write-conversion to look up non-standard charsets.
+(defvar ctext-non-standard-designations-alist
+ '(("$(0" . (big5 "big5-0" 2))
+ ("$(1" . (big5 "big5-0" 2))
+ ;; The following are actually standard; generating extended
+ ;; segments for them is wrong and screws e.g. Latin-9 users.
+ ;; 8859-{10,13,16} aren't Emacs charsets anyhow. -- fx
+;; ("-V" . (t "iso8859-10" 1))
+;; ("-Y" . (t "iso8859-13" 1))
+;; ("-_" . (t "iso8859-14" 1))
+;; ("-b" . (t "iso8859-15" 1))
+;; ("-f" . (t "iso8859-16" 1))
+ )
+ "Alist of ctext control sequences that introduce character sets which
+are not in the list of approved encodings, and the corresponding
+coding system, identifier string, and number of octets per encoded
+character.
+
+Each element has the form (CTLSEQ . (ENCODING CHARSET NOCTETS)). CTLSEQ
+is the control sequence (sans the leading ESC) that introduces the character
+set in the text encoded by compound-text. ENCODING is a coding system
+symbol; if it is t, it means that the ctext coding system already encodes
+the text correctly, and only the leading control sequence needs to be altered.
+If ENCODING is a coding system, we need to re-encode the text with that
+coding system. CHARSET is the name of the charset we need to put into
+the leading control sequence. NOCTETS is the number of octets (bytes) that
+encode each character in this charset. NOCTETS can be 0 (meaning the number
+of octets per character is variable), 1, 2, 3, or 4.")
+
+(defun ctext-pre-write-conversion (from to)
+ "Encode characters between FROM and TO as Compound Text w/Extended Segments.
+
+If FROM is a string, or if the current buffer is not the one set up for us
+by encode-coding-string, generate a new temp buffer, insert the
+text, and convert it in the temporary buffer. Otherwise, convert in-place."
+ (save-match-data
+ ;; Setup a working buffer if necessary.
+ (cond ((stringp from)
+ (let ((buf (current-buffer)))
+ (set-buffer (generate-new-buffer " *temp"))
+ (set-buffer-multibyte (multibyte-string-p from))
+ (insert from)))
+ ((not (string= (buffer-name) " *code-converting-work*"))
+ (let ((buf (current-buffer))
+ (multibyte enable-multibyte-characters))
+ (set-buffer (generate-new-buffer " *temp"))
+ (set-buffer-multibyte multibyte)
+ (insert-buffer-substring buf from to))))
+
+ ;; Now we can encode the whole buffer.
+ (let ((case-fold-search nil)
+ last-coding-system-used
+ pos posend desig encode-info encoding chset noctets textlen)
+ (goto-char (point-min))
+ ;; At first encode the whole buffer.
+ (encode-coding-region (point-min) (point-max) 'ctext-no-compositions)
+ ;; Then replace ISO-2022 charset designations with extended
+ ;; segments, for those charsets that are not part of the
+ ;; official X registry. The regexp below finds the leading
+ ;; sequences for big5.
+ (while (re-search-forward "\e\\(\$([01]\\)" nil 'move)
+ (setq pos (match-beginning 0)
+ posend (point)
+ desig (match-string 1)
+ encode-info (cdr (assoc desig
+ ctext-non-standard-designations-alist))
+ encoding (car encode-info)
+ chset (cadr encode-info)
+ noctets (car (cddr encode-info)))
+ (skip-chars-forward "^\e")
+ (cond
+ ((eq encoding t) ; only the leading sequence needs to be changed
+ (setq textlen (+ (- (point) posend) (length chset) 1))
+ ;; Generate the control sequence for an extended segment.
+ (replace-match (format "\e%%/%d%c%c%s\ 2"
+ noctets
+ (+ (/ textlen 128) 128)
+ (+ (% textlen 128) 128)
+ chset)
+ t t))
+ ((coding-system-p encoding) ; need to recode the entire segment...
+ (decode-coding-region pos (point) 'ctext-no-compositions)
+ (encode-coding-region pos (point) encoding)
+ (setq textlen (+ (- (point) pos) (length chset) 1))
+ (save-excursion
+ (goto-char pos)
+ (insert (format "\e%%/%d%c%c%s\ 2"
+ noctets
+ (+ (/ textlen 128) 128)
+ (+ (% textlen 128) 128)
+ chset))))))
+ (goto-char (point-min))))
+ ;; Must return nil, as build_annotations_2 expects that.
+ nil)
+
;;; FILE I/O
(defcustom auto-coding-alist
- '(("\\.\\(arc\\|zip\\|lzh\\|zoo\\|jar\\|tar\\|tgz\\)\\'" . no-conversion)
- ("\\.\\(gz\\|Z\\|bz\\|bz2\\|gpg\\)\\'" . no-conversion))
+ '(("\\.\\(arc\\|zip\\|lzh\\|zoo\\|jar\\|sx[dmicw]\\|tar\\|tgz\\)\\'" . no-conversion)
+ ("\\.\\(gz\\|Z\\|bz\\|bz2\\|gpg\\)\\'" . no-conversion)
+ ("/#[^/]+#\\'" . emacs-mule))
"Alist of filename patterns vs corresponding coding systems.
Each element looks like (REGEXP . CODING-SYSTEM).
A file whose name matches REGEXP is decoded by CODING-SYSTEM on reading.
:type '(repeat (cons (regexp :tag "Regexp")
(symbol :tag "Coding system"))))
+;; See the bottom of this file for built-in auto coding functions.
+(defcustom auto-coding-functions '(sgml-xml-auto-coding-function
+ sgml-html-meta-auto-coding-function)
+ "A list of functions which attempt to determine a coding system.
+
+Each function in this list should be written to operate on the
+current buffer, but should not modify it in any way. The buffer
+will contain undecoded text of parts of the file. Each function
+should take one argument, SIZE, which says how many
+characters (starting from point) it should look at.
+
+If one of these functions succeeds in determining a coding
+system, it should return that coding system. Otherwise, it
+should return nil.
+
+If a file has a `coding:' tag, that takes precedence over these
+functions, so they won't be called at all."
+ :group 'files
+ :group 'mule
+ :type '(repeat function))
+
(defvar set-auto-coding-for-load nil
"Non-nil means look for `load-coding' property instead of `coding'.
This is used for loading and byte-compiling Emacs Lisp files.")
(defun auto-coding-alist-lookup (filename)
"Return the coding system specified by `auto-coding-alist' for FILENAME."
(let ((alist auto-coding-alist)
- (case-fold-search (memq system-type '(vax-vms windows-nt ms-dos)))
+ (case-fold-search (memq system-type '(vax-vms windows-nt ms-dos cygwin)))
coding-system)
(while (and alist (not coding-system))
(if (string-match (car (car alist)) filename)
(setq alist (cdr alist))))
coding-system))
-
-(defun auto-coding-from-file-contents (size)
- "Determine a coding system from the contents of the current buffer.
-The current buffer contains SIZE bytes starting at point.
-Value is either a coding system or nil."
- (save-excursion
- (let ((alist auto-coding-regexp-alist)
- coding-system)
- (while (and alist (not coding-system))
- (let ((regexp (car (car alist))))
- (when (re-search-forward regexp (+ (point) size) t)
- (setq coding-system (cdr (car alist)))))
- (setq alist (cdr alist)))
- coding-system)))
-
-
(defun set-auto-coding (filename size)
"Return coding system for a file FILENAME of which SIZE bytes follow point.
These bytes should include at least the first 1k of the file
and the last 3k of the file, but the middle may be omitted.
-It checks FILENAME against the variable `auto-coding-alist'. If
-FILENAME doesn't match any entries in the variable, it checks the
+The function checks FILENAME against the variable `auto-coding-alist'.
+If FILENAME doesn't match any entries in the variable, it checks the
contents of the current buffer following point against
`auto-coding-regexp-alist'. If no match is found, it checks for a
`coding:' tag in the first one or two lines following point. If no
-`coding:' tag is found, it checks for local variables list in the last
-3K bytes out of the SIZE bytes.
+`coding:' tag is found, it checks any local variables list in the last
+3K bytes out of the SIZE bytes. Finally, if none of these methods
+succeed, it checks to see if any function in `auto-coding-functions'
+gives a match.
-The return value is the specified coding system,
-or nil if nothing specified.
+The return value is the specified coding system, or nil if nothing is
+specified.
The variable `set-auto-coding-function' (which see) is set to this
function by default."
(or (auto-coding-alist-lookup filename)
- (auto-coding-from-file-contents size)
+ ;; Try using `auto-coding-regexp-alist'.
+ (save-excursion
+ (let ((alist auto-coding-regexp-alist)
+ coding-system)
+ (while (and alist (not coding-system))
+ (let ((regexp (car (car alist))))
+ (when (re-search-forward regexp (+ (point) size) t)
+ (setq coding-system (cdr (car alist)))))
+ (setq alist (cdr alist)))
+ coding-system))
(let* ((case-fold-search t)
(head-start (point))
(head-end (+ head-start (min size 1024)))
(setq coding-system (intern (match-string 1)))
(or (coding-system-p coding-system)
(setq coding-system nil))))))
+ coding-system)
+ ;; Finally, try all the `auto-coding-functions'.
+ (let ((funcs auto-coding-functions)
+ (coding-system nil))
+ (while (and funcs (not coding-system))
+ (setq coding-system (condition-case e
+ (save-excursion
+ (goto-char (point-min))
+ (funcall (pop funcs) size))
+ (error nil))))
coding-system)))
(setq set-auto-coding-function 'set-auto-coding)
-(defun after-insert-file-set-buffer-file-coding-system (inserted)
- "Set `buffer-file-coding-system' of current buffer after text is inserted."
+(defun after-insert-file-set-coding (inserted)
+ "Set `buffer-file-coding-system' of current buffer after text is inserted.
+INSERTED is the number of characters that were inserted, as figured
+in the situation before this function. Return the number of characters
+inserted, as figured in the situation after. The two numbers can be
+different if the buffer has become unibyte."
(if last-coding-system-used
(let ((coding-system
(find-new-buffer-file-coding-system last-coding-system-used))
(= (buffer-size) inserted))
;; For coding systems no-conversion and raw-text...,
;; edit the buffer as unibyte.
- (let ((pos-byte (position-bytes (+ (point) inserted))))
+ (let ((pos-marker (copy-marker (+ (point) inserted))))
(set-buffer-multibyte nil)
- (setq inserted (- pos-byte (position-bytes (point))))))
+ (setq inserted (- pos-marker (point)))))
(set-buffer-modified-p modified-p))))
inserted)
-(add-hook 'after-insert-file-functions
- 'after-insert-file-set-buffer-file-coding-system)
-
;; The coding-spec and eol-type of coding-system returned is decided
;; independently in the following order.
;; 1. That of buffer-file-coding-system locally bound.
(cons (cons regexp coding-system)
network-coding-system-alist)))))))
+(defun decode-coding-inserted-region (from to filename
+ &optional visit beg end replace)
+ "Decode the region between FROM and TO as if it is read from file FILENAME.
+Optional arguments VISIT, BEG, END, and REPLACE are the same as those
+of the function `insert-file-contents'."
+ (save-excursion
+ (save-restriction
+ (narrow-to-region from to)
+ (goto-char (point-min))
+ (let ((coding coding-system-for-read))
+ (or coding
+ (setq coding (funcall set-auto-coding-function
+ filename (- (point-max) (point-min)))))
+ (or coding
+ (setq coding (find-operation-coding-system
+ 'insert-file-contents
+ filename visit beg end replace)))
+ (if (coding-system-p coding)
+ (or enable-multibyte-characters
+ (setq coding
+ (coding-system-change-text-conversion coding 'raw-text)))
+ (setq coding nil))
+ (if coding
+ (decode-coding-region (point-min) (point-max) coding))
+ (setq last-coding-system-used coding)))))
+
(defun make-translation-table (&rest args)
"Make a translation table from arguments.
A translation table is a char table intended for character
(put 'with-category-table 'lisp-indent-function 1)
-(defmacro with-category-table (category-table &rest body)
- `(let ((current-category-table (category-table)))
- (set-category-table ,category-table)
- (unwind-protect
- (progn ,@body)
- (set-category-table current-category-table))))
+(defmacro with-category-table (table &rest body)
+ "Evaluate BODY with category table of current buffer set to TABLE.
+The category table of the current buffer is saved, BODY is evaluated,
+then the saved table is restored, even in case of an abnormal exit.
+Value is what BODY returns."
+ (let ((old-table (make-symbol "old-table"))
+ (old-buffer (make-symbol "old-buffer")))
+ `(let ((,old-table (category-table))
+ (,old-buffer (current-buffer)))
+ (unwind-protect
+ (progn
+ (set-category-table ,table)
+ ,@body)
+ (save-current-buffer
+ (set-buffer ,old-buffer)
+ (set-category-table ,old-table))))))
+
+(defun define-translation-hash-table (symbol table)
+ "Define SYMBOL as the name of the hash translation TABLE for use in CCL.
+
+Analogous to `define-translation-table', but updates
+`translation-hash-table-vector' and the table is for use in the CCL
+`lookup-integer' and `lookup-character' functions."
+ (unless (and (symbolp symbol)
+ (hash-table-p table))
+ (error "Bad args to define-translation-hash-table"))
+ (let ((len (length translation-hash-table-vector))
+ (id 0)
+ done)
+ (put symbol 'translation-hash-table table)
+ (while (not done)
+ (if (>= id len)
+ (setq translation-hash-table-vector
+ (vconcat translation-hash-table-vector [nil])))
+ (let ((slot (aref translation-hash-table-vector id)))
+ (if (or (not slot)
+ (eq (car slot) symbol))
+ (progn
+ (aset translation-hash-table-vector id (cons symbol table))
+ (setq done t))
+ (setq id (1+ id)))))
+ (put symbol 'translation-hash-table-id id)
+ id))
;;; Initialize some variables.
(setq ignore-relative-composition
(make-char-table 'ignore-relative-composition))
+
+;;; Built-in auto-coding-functions:
+
+(defun sgml-xml-auto-coding-function (size)
+ "Determine whether the buffer is XML, and if so, its encoding.
+This function is intended to be added to `auto-coding-functions'."
+ (setq size (+ (point) size))
+ (when (re-search-forward "\\`[[:space:]\n]*<\\?xml" size t)
+ (let ((end (save-excursion
+ ;; This is a hack.
+ (re-search-forward "\"\\s-*\\?>" size t))))
+ (when end
+ (if (re-search-forward "encoding=\"\\(.+?\\)\"" end t)
+ (let* ((match (match-string 1))
+ (sym (intern (downcase match))))
+ (if (coding-system-p sym)
+ sym
+ (message "Warning: unknown coding system \"%s\"" match)
+ nil))
+ 'utf-8)))))
+
+(defun sgml-html-meta-auto-coding-function (size)
+ "If the buffer has an HTML meta tag, use it to determine encoding.
+This function is intended to be added to `auto-coding-functions'."
+ (setq size (min (+ (point) size)
+ ;; Only search forward 10 lines
+ (save-excursion
+ (forward-line 10)
+ (point))))
+ (when (and (search-forward "<html>" size t)
+ (re-search-forward "<meta\\s-+http-equiv=\"content-type\"\\s-+content=\"text/\\sw+;\\s-*charset=\\(.+?\\)\"" size t))
+ (let* ((match (match-string 1))
+ (sym (intern (downcase match))))
+ (if (coding-system-p sym)
+ sym
+ (message "Warning: unknown coding system \"%s\"" match)
+ nil))))
+
;;;
(provide 'mule)
+;;; arch-tag: 9aebaa6e-0e8a-40a9-b857-cb5d04a39e7c
;;; mule.el ends here
HCoop / bpt / emacs.git / blobdiff