1 ;;; mule.el --- basic commands for mulitilingual environment
3 ;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
4 ;; Licensed to the Free Software Foundation.
6 ;; Keywords: mule, multilingual, character set, coding system
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
27 (defconst mule-version "4.0 (HANANOEN)" "\
28 Version number and name of this version of MULE (multilingual environment).")
30 (defconst mule-version-date "1998.7.1" "\
31 Distribution date of this version of MULE (multilingual environment).")
33 (defun load-with-code-conversion (fullname file &optional noerror nomessage)
34 "Execute a file of Lisp code named FILE whose absolute name is FULLNAME.
35 The file contents are decoded before evaluation if necessary.
36 If optional second arg NOERROR is non-nil,
37 report no error if FILE doesn't exist.
38 Print messages at start and end of loading unless
39 optional third arg NOMESSAGE is non-nil.
40 Return t if file exists."
41 (if (null (file-readable-p fullname))
43 (signal 'file-error (list "Cannot open load file" file)))
44 ;; Read file with code conversion, and then eval.
46 ;; To avoid any autoloading, set default-major-mode to
48 ;; So that we don't get completely screwed if the
49 ;; file is encoded in some complicated character set,
50 ;; read it with real decoding, as a multibyte buffer,
51 ;; even if this is a --unibyte Emacs session.
52 (let ((default-major-mode 'fundamental-mode)
53 (default-enable-multibyte-characters t))
54 ;; We can't use `generate-new-buffer' because files.el
56 (get-buffer-create (generate-new-buffer-name " *load*"))))
58 (source (save-match-data (string-match "\\.el\\'" fullname))))
61 (message "Loading %s (source)..." file)
62 (message "Loading %s..." file)))
64 (setq preloaded-file-list (cons file preloaded-file-list)))
66 (let ((load-file-name fullname)
67 (set-auto-coding-for-load t)
68 (inhibit-file-name-operation nil))
71 (insert-file-contents fullname)
72 ;; If the loaded file was inserted with no-conversion or
73 ;; raw-text coding system, make the buffer unibyte.
74 ;; Otherwise, eval-buffer might try to interpret random
75 ;; binary junk as multibyte characters.
76 (if (and enable-multibyte-characters
77 (or (eq (coding-system-type last-coding-system-used) 5)
78 (eq last-coding-system-used 'no-conversion)))
79 (set-buffer-multibyte nil))
80 ;; Make `kill-buffer' quiet.
81 (set-buffer-modified-p nil))
82 ;; Have the original buffer current while we eval.
83 (eval-buffer buffer nil file
84 ;; If this Emacs is running with --unibyte,
85 ;; convert multibyte strings to unibyte
86 ;; after reading them.
87 ;; (not default-enable-multibyte-characters)
89 (let (kill-buffer-hook kill-buffer-query-functions)
90 (kill-buffer buffer)))
91 (let ((hook (assoc file after-load-alist)))
93 (mapcar (function eval) (cdr hook))))
94 (unless (or nomessage noninteractive)
96 (message "Loading %s (source)...done" file)
97 (message "Loading %s...done" file)))
100 ;; API (Application Program Interface) for charsets.
102 ;; Return t if OBJ is a quoted symbol
103 ;; and the symbol is the name of a standard charset.
104 (defsubst charset-quoted-standard-p (obj)
105 (and (listp obj) (eq (car obj) 'quote)
106 (symbolp (car-safe (cdr obj)))
107 (let ((vector (get (car-safe (cdr obj)) 'charset)))
108 (and (vectorp vector)
109 (< (aref vector 0) 160)))))
111 (defsubst charsetp (object)
112 "T is OBJECT is a charset."
113 (and (symbolp object) (vectorp (get object 'charset))))
115 (defsubst charset-info (charset)
116 "Return a vector of information of CHARSET.
117 The elements of the vector are:
118 CHARSET-ID, BYTES, DIMENSION, CHARS, WIDTH, DIRECTION,
119 LEADING-CODE-BASE, LEADING-CODE-EXT,
120 ISO-FINAL-CHAR, ISO-GRAPHIC-PLANE,
121 REVERSE-CHARSET, SHORT-NAME, LONG-NAME, DESCRIPTION,
124 CHARSET-ID (integer) is the identification number of the charset.
125 DIMENSION (integer) is the number of bytes to represent a character of
127 CHARS (integer) is the number of characters in a dimension: 94 or 96.
128 BYTE (integer) is the length of multi-byte form of a character in
129 the charset: one of 1, 2, 3, and 4.
130 WIDTH (integer) is the number of columns a character in the charset
131 occupies on the screen: one of 0, 1, and 2.
132 DIRECTION (integer) is the rendering direction of characters in the
133 charset when rendering. If 0, render from right to left, else
134 render from left to right.
135 LEADING-CODE-BASE (integer) is the base leading-code for the
137 LEADING-CODE-EXT (integer) is the extended leading-code for the
138 charset. All charsets of less than 0xA0 has the value 0.
139 ISO-FINAL-CHAR (character) is the final character of the
140 corresponding ISO 2022 charset.
141 ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked
142 while encoding to variants of ISO 2022 coding system, one of the
143 following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR).
144 REVERSE-CHARSET (integer) is the charset which differs only in
145 LEFT-TO-RIGHT value from the charset. If there's no such a
146 charset, the value is -1.
147 SHORT-NAME (string) is the short name to refer to the charset.
148 LONG-NAME (string) is the long name to refer to the charset
149 DESCRIPTION (string) is the description string of the charset.
150 PLIST (property list) may contain any type of information a user
151 want to put and get by functions `put-charset-property' and
152 `get-charset-property' respectively."
153 (get charset 'charset))
155 (defmacro charset-id (charset)
156 "Return charset identification number of CHARSET."
157 (if (charset-quoted-standard-p charset)
158 (aref (charset-info (nth 1 charset)) 0)
159 `(aref (charset-info ,charset) 0)))
161 (defmacro charset-bytes (charset)
162 "Return bytes of CHARSET.
163 See the function `charset-info' for more detail."
164 (if (charset-quoted-standard-p charset)
165 (aref (charset-info (nth 1 charset)) 1)
166 `(aref (charset-info ,charset) 1)))
168 (defmacro charset-dimension (charset)
169 "Return dimension of CHARSET.
170 See the function `charset-info' for more detail."
171 (if (charset-quoted-standard-p charset)
172 (aref (charset-info (nth 1 charset)) 2)
173 `(aref (charset-info ,charset) 2)))
175 (defmacro charset-chars (charset)
176 "Return character numbers contained in a dimension of CHARSET.
177 See the function `charset-info' for more detail."
178 (if (charset-quoted-standard-p charset)
179 (aref (charset-info (nth 1 charset)) 3)
180 `(aref (charset-info ,charset) 3)))
182 (defmacro charset-width (charset)
183 "Return width (how many column occupied on a screen) of CHARSET.
184 See the function `charset-info' for more detail."
185 (if (charset-quoted-standard-p charset)
186 (aref (charset-info (nth 1 charset)) 4)
187 `(aref (charset-info ,charset) 4)))
189 (defmacro charset-direction (charset)
190 "Return direction of CHARSET.
191 See the function `charset-info' for more detail."
192 (if (charset-quoted-standard-p charset)
193 (aref (charset-info (nth 1 charset)) 5)
194 `(aref (charset-info ,charset) 5)))
196 (defmacro charset-iso-final-char (charset)
197 "Return final char of CHARSET.
198 See the function `charset-info' for more detail."
199 (if (charset-quoted-standard-p charset)
200 (aref (charset-info (nth 1 charset)) 8)
201 `(aref (charset-info ,charset) 8)))
203 (defmacro charset-iso-graphic-plane (charset)
204 "Return graphic plane of CHARSET.
205 See the function `charset-info' for more detail."
206 (if (charset-quoted-standard-p charset)
207 (aref (charset-info (nth 1 charset)) 9)
208 `(aref (charset-info ,charset) 9)))
210 (defmacro charset-reverse-charset (charset)
211 "Return reverse charset of CHARSET.
212 See the function `charset-info' for more detail."
213 (if (charset-quoted-standard-p charset)
214 (aref (charset-info (nth 1 charset)) 10)
215 `(aref (charset-info ,charset) 10)))
217 (defmacro charset-short-name (charset)
218 "Return short name of CHARSET.
219 See the function `charset-info' for more detail."
220 (if (charset-quoted-standard-p charset)
221 (aref (charset-info (nth 1 charset)) 11)
222 `(aref (charset-info ,charset) 11)))
224 (defmacro charset-long-name (charset)
225 "Return long name of CHARSET.
226 See the function `charset-info' for more detail."
227 (if (charset-quoted-standard-p charset)
228 (aref (charset-info (nth 1 charset)) 12)
229 `(aref (charset-info ,charset) 12)))
231 (defmacro charset-description (charset)
232 "Return description of CHARSET.
233 See the function `charset-info' for more detail."
234 (if (charset-quoted-standard-p charset)
235 (aref (charset-info (nth 1 charset)) 13)
236 `(aref (charset-info ,charset) 13)))
238 (defmacro charset-plist (charset)
239 "Return list charset property of CHARSET.
240 See the function `charset-info' for more detail."
241 (if (charset-quoted-standard-p charset)
242 `(aref ,(charset-info (nth 1 charset)) 14)
243 `(aref (charset-info ,charset) 14)))
245 (defun set-charset-plist (charset plist)
246 "Set CHARSET's property list to PLIST, and return PLIST."
247 (aset (charset-info charset) 14 plist))
249 (defun make-char (charset &optional c1 c2)
250 "Return a character of CHARSET and position codes CODE1 and CODE2.
251 CODE1 and CODE2 are optional, but if you don't supply
252 sufficient position codes, return a generic character which stands for
253 all characters or group of characters in the character set.
254 A generic character can be used to index a char table (e.g. syntax-table)."
255 (make-char-internal (charset-id charset) c1 c2))
257 (put 'make-char 'byte-compile
260 (let ((charset (nth 1 form)))
261 (if (charset-quoted-standard-p charset)
262 (byte-compile-normal-call
263 (cons 'make-char-internal
264 (cons (charset-id (nth 1 charset)) (nthcdr 2 form))))
265 (byte-compile-normal-call
266 (cons 'make-char-internal
267 (cons (list 'charset-id charset) (nthcdr 2 form)))))))))
269 (defun charset-list ()
270 "Return list of charsets ever defined.
272 This function is provided for backward compatibility.
273 Now we have the variable `charset-list'."
276 (defsubst generic-char-p (char)
277 "Return t if and only if CHAR is a generic character.
278 See also the documentation of make-char."
280 (let ((l (split-char char)))
281 (and (or (= (nth 1 l) 0) (eq (nth 2 l) 0))
282 (not (eq (car l) 'composition))))))
285 ;; Coding system staffs
287 ;; Coding system is a symbol that has the property `coding-system'.
289 ;; The value of the property `coding-system' is a vector of the
291 ;; [TYPE MNEMONIC DOC-STRING PLIST FLAGS]
292 ;; We call this vector as coding-spec. See comments in src/coding.c
295 (defconst coding-spec-type-idx 0)
296 (defconst coding-spec-mnemonic-idx 1)
297 (defconst coding-spec-doc-string-idx 2)
298 (defconst coding-spec-plist-idx 3)
299 (defconst coding-spec-flags-idx 4)
301 ;; PLIST is a property list of a coding system. To share PLIST among
302 ;; alias coding systems, a coding system has PLIST in coding-spec
303 ;; instead of having it in normal property list of Lisp symbol.
304 ;; Here's a list of coding system properties currently being used.
308 ;; The value is a coding category the coding system belongs to. The
309 ;; function `make-coding-system' and `define-coding-system-alias' sets
310 ;; this value automatically.
312 ;; o alias-coding-systems
314 ;; The value is a list of coding systems of the same alias group. The
315 ;; first element is the coding system made at first, which we call as
316 ;; `base coding system'. The function `make-coding-system' and
317 ;; `define-coding-system-alias' set this value automatically.
319 ;; o post-read-conversion
321 ;; The value is a function to call after some text is inserted and
322 ;; decoded by the coding system itself and before any functions in
323 ;; `after-insert-functions' are called. The arguments to this
324 ;; function is the same as those of a function in
325 ;; `after-insert-functions', i.e. LENGTH of a text while putting point
326 ;; at the head of the text to be decoded
328 ;; o pre-write-conversion
330 ;; The value is a function to call after all functions in
331 ;; `write-region-annotate-functions' and `buffer-file-format' are
332 ;; called, and before the text is encoded by the coding system itself.
333 ;; The arguments to this function is the same as those of a function
334 ;; in `write-region-annotate-functions', i.e. FROM and TO specifying
337 ;; o translation-table-for-decode
339 ;; The value is a translation table to be applied on decoding. See
340 ;; the function `make-translation-table' for the format of translation
343 ;; o translation-table-for-encode
345 ;; The value is a translation table to be applied on encoding.
349 ;; The value is a list of charsets safely supported by the coding
350 ;; system. The value t means that all charsets Emacs handles are
351 ;; supported. Even if some charset is not in this list, it doesn't
352 ;; mean that the charset can't be encoded in the coding system,
353 ;; instead, it just means that some other receiver of a text encoded
354 ;; in the coding system won't be able to handle that charset.
358 ;; The value is a symbol of which name is `MIME-charset' parameter of
359 ;; the coding system.
361 ;; o charset-origin-alist
363 ;; The value is a list of this form:
364 ;; (CHARSET EXTERNAL-CHARSET-NAME ENCODING-FUNCTION).
365 ;; ENCODING-FUNCTION is a function to encode a character in CHARSET
366 ;; to the code in EXTERNAL-CHARSET-NAME. The command what-cursor-position
367 ;; uses this information of the buffer-file-coding-system.
368 ;; ENCODING-FUNCTION may be a translation table or a symbol whose
369 ;; property `translation-table' is a translation table. In these case,
370 ;; the translation table is used to encode the character.
372 ;; o valid-codes (meaningful only for a coding system based on CCL)
374 ;; The value is a list to indicate valid byte ranges of the encoded
375 ;; file. Each element of the list is an integer or a cons of integer.
376 ;; In the former case, the integer value is a valid byte code. In the
377 ;; latter case, the integers specifies the range of valid byte codes.
380 ;; Return coding-spec of CODING-SYSTEM
381 (defsubst coding-system-spec (coding-system)
382 (get (check-coding-system coding-system) 'coding-system))
384 (defun coding-system-type (coding-system)
385 "Return the coding type of CODING-SYSTEM.
386 A coding type is an integer value indicating the encoding method
387 of CODING-SYSTEM. See the function `make-coding-system' for more detail."
388 (aref (coding-system-spec coding-system) coding-spec-type-idx))
390 (defun coding-system-mnemonic (coding-system)
391 "Return the mnemonic character of CODING-SYSTEM.
392 The mnemonic character of a coding system is used in mode line
393 to indicate the coding system. If the arg is nil, return ?-."
394 (let ((spec (coding-system-spec coding-system)))
395 (if spec (aref spec coding-spec-mnemonic-idx) ?-)))
397 (defun coding-system-doc-string (coding-system)
398 "Return the documentation string for CODING-SYSTEM."
399 (aref (coding-system-spec coding-system) coding-spec-doc-string-idx))
401 (defun coding-system-plist (coding-system)
402 "Return the property list of CODING-SYSTEM."
403 (aref (coding-system-spec coding-system) coding-spec-plist-idx))
405 (defun coding-system-flags (coding-system)
406 "Return `flags' of CODING-SYSTEM.
407 A `flags' of a coding system is a vector of length 32 indicating detailed
408 information of a coding system. See the function `make-coding-system'
410 (aref (coding-system-spec coding-system) coding-spec-flags-idx))
412 (defun coding-system-get (coding-system prop)
413 "Extract a value from CODING-SYSTEM's property list for property PROP."
414 (plist-get (coding-system-plist coding-system) prop))
416 (defun coding-system-put (coding-system prop val)
417 "Change value in CODING-SYSTEM's property list PROP to VAL."
418 (let ((plist (coding-system-plist coding-system)))
420 (plist-put plist prop val)
421 (aset (coding-system-spec coding-system) coding-spec-plist-idx
424 (defun coding-system-category (coding-system)
425 "Return the coding category of CODING-SYSTEM."
426 (coding-system-get coding-system 'coding-category))
428 (defun coding-system-base (coding-system)
429 "Return the base coding system of CODING-SYSTEM.
430 A base coding system is what made by `make-coding-system'.
431 Any alias nor subsidiary coding systems are not base coding system."
432 (car (coding-system-get coding-system 'alias-coding-systems)))
434 (defalias 'coding-system-parent 'coding-system-base)
435 (make-obsolete 'coding-system-parent 'coding-system-base)
437 ;; Coding system also has a property `eol-type'.
439 ;; This property indicates how the coding system handles end-of-line
440 ;; format. The value is integer 0, 1, 2, or a vector of three coding
441 ;; systems. Each integer value 0, 1, and 2 indicates the format of
442 ;; end-of-line LF, CRLF, and CR respectively. A vector value
443 ;; indicates that the format of end-of-line should be detected
444 ;; automatically. Nth element of the vector is the subsidiary coding
445 ;; system whose `eol-type' property is N.
447 (defun coding-system-eol-type (coding-system)
448 "Return eol-type of CODING-SYSTEM.
449 An eol-type is integer 0, 1, 2, or a vector of coding systems.
451 Integer values 0, 1, and 2 indicate a format of end-of-line; LF,
452 CRLF, and CR respectively.
454 A vector value indicates that a format of end-of-line should be
455 detected automatically. Nth element of the vector is the subsidiary
456 coding system whose eol-type is N."
457 (get coding-system 'eol-type))
459 (defun coding-system-lessp (x y)
460 (cond ((eq x 'no-conversion) t)
461 ((eq y 'no-conversion) nil)
462 ((eq x 'emacs-mule) t)
463 ((eq y 'emacs-mule) nil)
464 ((eq x 'undecided) t)
465 ((eq y 'undecided) nil)
466 (t (let ((c1 (coding-system-mnemonic x))
467 (c2 (coding-system-mnemonic y)))
468 (or (< (downcase c1) (downcase c2))
469 (and (not (> (downcase c1) (downcase c2)))
472 ;; Add CODING-SYSTEM to coding-system-list while keeping it sorted.
473 (defun add-to-coding-system-list (coding-system)
474 (if (or (null coding-system-list)
475 (coding-system-lessp coding-system (car coding-system-list)))
476 (setq coding-system-list (cons coding-system coding-system-list))
477 (let ((len (length coding-system-list))
478 mid (tem coding-system-list))
480 (setq mid (nthcdr (/ len 2) tem))
481 (if (coding-system-lessp (car mid) coding-system)
483 len (- len (/ len 2)))
484 (setq len (/ len 2))))
485 (setcdr tem (cons coding-system (cdr tem))))))
487 (defun coding-system-list (&optional base-only)
488 "Return a list of all existing coding systems.
489 If optional arg BASE-ONLY is non-nil, only base coding systems are listed."
490 (let* ((codings (copy-sequence coding-system-list))
491 (tail (cons nil codings)))
492 ;; Remove subsidiary coding systems (eol variants) and alias
493 ;; coding systems (if necessary).
495 (let* ((coding (car (cdr tail)))
496 (aliases (coding-system-get coding 'alias-coding-systems)))
498 ;; CODING is an eol variant if not in ALIASES.
499 (not (memq coding aliases))
500 ;; CODING is an alias if it is not car of ALIASES.
501 (and base-only (not (eq coding (car aliases)))))
502 (setcdr tail (cdr (cdr tail)))
503 (setq tail (cdr tail)))))
506 ;; Make subsidiary coding systems (eol-type variants) of CODING-SYSTEM.
507 (defun make-subsidiary-coding-system (coding-system)
508 (let ((coding-spec (coding-system-spec coding-system))
509 (subsidiaries (vector (intern (format "%s-unix" coding-system))
510 (intern (format "%s-dos" coding-system))
511 (intern (format "%s-mac" coding-system))))
515 (put (aref subsidiaries i) 'coding-system coding-spec)
516 (put (aref subsidiaries i) 'eol-type i)
517 (add-to-coding-system-list (aref subsidiaries i))
518 (setq coding-system-alist
519 (cons (list (symbol-name (aref subsidiaries i)))
520 coding-system-alist))
524 (defun make-coding-system (coding-system type mnemonic doc-string
525 &optional flags properties)
526 "Define a new coding system CODING-SYSTEM (symbol).
527 Remaining arguments are TYPE, MNEMONIC, DOC-STRING, FLAGS (optional),
528 and PROPERTIES (optional) which construct a coding-spec of CODING-SYSTEM
529 in the following format:
530 [TYPE MNEMONIC DOC-STRING PLIST FLAGS]
532 TYPE is an integer value indicating the type of the coding system as follows:
533 0: Emacs internal format,
534 1: Shift-JIS (or MS-Kanji) used mainly on Japanese PC,
535 2: ISO-2022 including many variants,
536 3: Big5 used mainly on Chinese PC,
537 4: private, CCL programs provide encoding/decoding algorithm,
538 5: Raw-text, which means that text contains random 8-bit codes.
540 MNEMONIC is a character to be displayed on mode line for the coding system.
542 DOC-STRING is a documentation string for the coding system.
544 FLAGS specifies more detailed information of the coding system as follows:
546 If TYPE is 2 (ISO-2022), FLAGS is a list of these elements:
547 CHARSET0, CHARSET1, CHARSET2, CHARSET3, SHORT-FORM,
548 ASCII-EOL, ASCII-CNTL, SEVEN, LOCKING-SHIFT, SINGLE-SHIFT,
549 USE-ROMAN, USE-OLDJIS, NO-ISO6429, INIT-BOL, DESIGNATION-BOL,
550 SAFE, ACCEPT-LATIN-EXTRA-CODE.
551 CHARSETn are character sets initially designated to Gn graphic registers.
552 If CHARSETn is nil, Gn is never used.
553 If CHARSETn is t, Gn can be used but nothing designated initially.
554 If CHARSETn is a list of character sets, those character sets are
555 designated to Gn on output, but nothing designated to Gn initially.
556 But, character set `ascii' can be designated only to G0.
557 SHORT-FORM non-nil means use short designation sequence on output.
558 ASCII-EOL non-nil means designate ASCII to g0 at end of line on output.
559 ASCII-CNTL non-nil means designate ASCII to g0 before control codes and
561 SEVEN non-nil means use 7-bit code only on output.
562 LOCKING-SHIFT non-nil means use locking-shift.
563 SINGLE-SHIFT non-nil means use single-shift.
564 USE-ROMAN non-nil means designate JIS0201-1976-Roman instead of ASCII.
565 USE-OLDJIS non-nil means designate JIS0208-1976 instead of JIS0208-1983.
566 NO-ISO6429 non-nil means not use ISO6429's direction specification.
567 INIT-BOL non-nil means any designation state is assumed to be reset
568 to initial at each beginning of line on output.
569 DESIGNATION-BOL non-nil means designation sequences should be placed
570 at beginning of line on output.
571 SAFE non-nil means convert unsafe characters to `?' on output.
572 Unsafe characters are what not specified in SAFE-CHARSET.
573 ACCEPT-LATIN-EXTRA-CODE non-nil means code-detection routine accepts
574 a code specified in `latin-extra-code-table' (which see) as a valid
575 code of the coding system.
577 If TYPE is 4 (private), FLAGS should be a cons of CCL programs, for
578 decoding and encoding. CCL programs should be specified by their
581 PROPERTIES is an alist of properties vs the corresponding values.
582 These properties are set in PLIST, a property list. This function
583 also sets properties `coding-category' and `alias-coding-systems'
586 Kludgy features for backward compatibility:
588 1. If TYPE is 4 and car or cdr of FLAGS is a vector, the vector is
589 treated as a compiled CCL code.
591 2. If PROPERTIES is just a list of character sets, the list is set as
592 a value of `safe-charsets' in PLIST."
593 (if (memq coding-system coding-system-list)
594 (error "Coding system %s already exists" coding-system))
596 ;; Set a value of `coding-system' property.
597 (let ((coding-spec (make-vector 5 nil))
598 (no-initial-designation t)
599 (no-alternative-designation t)
601 (if (or (not (integerp type)) (< type 0) (> type 5))
602 (error "TYPE argument must be 0..5"))
603 (if (or (not (integerp mnemonic)) (<= mnemonic ? ) (> mnemonic 127))
604 (error "MNEMONIC argument must be an ASCII printable character."))
605 (aset coding-spec coding-spec-type-idx type)
606 (aset coding-spec coding-spec-mnemonic-idx mnemonic)
607 (aset coding-spec coding-spec-doc-string-idx
608 (if (stringp doc-string) doc-string ""))
610 (setq coding-category 'coding-category-emacs-mule))
612 (setq coding-category 'coding-category-sjis))
613 ((= type 2) ; ISO2022
615 (vec (make-vector 32 nil))
619 (let ((charset (car fl)))
620 (if (and no-initial-designation
622 (or (charsetp charset)
624 (charsetp (car charset)))))
625 (setq no-initial-designation nil))
626 (if (charsetp charset)
627 (if (= i 1) (setq g1-designation charset))
632 (setq elt (car tail))
634 (setq no-alternative-designation nil)
635 (if (and elt (not (charsetp elt)))
636 (error "Invalid charset: %s" elt)))
637 (setq tail (cdr tail)))
638 (setq g1-designation (car charset)))
641 (setq no-alternative-designation nil)
642 (error "Invalid charset: %s" charset)))))
643 (aset vec i charset))
644 (setq fl (cdr fl) i (1+ i)))
645 (while (and (< i 32) fl)
646 (aset vec i (car fl))
647 (setq fl (cdr fl) i (1+ i)))
648 (aset coding-spec 4 vec)
649 (setq coding-category
650 (if (aref vec 8) ; Use locking-shift.
651 (or (and (aref vec 7) 'coding-category-iso-7-else)
652 'coding-category-iso-8-else)
653 (if (aref vec 7) ; 7-bit only.
654 (if (aref vec 9) ; Use single-shift.
655 'coding-category-iso-7-else
656 (if no-alternative-designation
657 'coding-category-iso-7-tight
658 'coding-category-iso-7))
659 (if (or no-initial-designation
660 (not no-alternative-designation))
661 'coding-category-iso-8-else
662 (if (and (charsetp g1-designation)
663 (= (charset-dimension g1-designation) 2))
664 'coding-category-iso-8-2
665 'coding-category-iso-8-1)))))))
667 (setq coding-category 'coding-category-big5))
668 ((= type 4) ; private
669 (setq coding-category 'coding-category-ccl)
670 (if (not (consp flags))
671 (error "Invalid FLAGS argument for TYPE 4 (CCL)")
672 (let ((decoder (check-ccl-program
674 (intern (format "%s-decoder" coding-system))))
675 (encoder (check-ccl-program
677 (intern (format "%s-encoder" coding-system)))))
678 (if (and decoder encoder)
679 (aset coding-spec 4 (cons decoder encoder))
680 (error "Invalid FLAGS argument for TYPE 4 (CCL)")))))
682 (setq coding-category 'coding-category-raw-text)))
684 (let ((plist (list 'coding-category coding-category
685 'alias-coding-systems (list coding-system))))
686 (if no-initial-designation
687 (plist-put plist 'no-initial-designation t))
689 (or (eq properties t)
690 (not (consp (car properties)))))
691 ;; In the old version, the arg PROPERTIES is a list to be
692 ;; set in PLIST as a value of property `safe-charsets'.
693 (plist-put plist 'safe-charsets properties)
694 (let ((l properties))
696 (plist-put plist (car (car l)) (cdr (car l)))
698 (aset coding-spec coding-spec-plist-idx plist))
699 (put coding-system 'coding-system coding-spec)
700 (put coding-category 'coding-systems
701 (cons coding-system (get coding-category 'coding-systems))))
703 ;; Next, set a value of `eol-type' property. The value is a vector
704 ;; of subsidiary coding systems, each corresponds to a coding system
705 ;; for the detected end-of-line format.
706 (put coding-system 'eol-type
707 (if (or (<= type 3) (= type 5))
708 (make-subsidiary-coding-system coding-system)
711 ;; At last, register CODING-SYSTEM in `coding-system-list' and
712 ;; `coding-system-alist'.
713 (add-to-coding-system-list coding-system)
714 (setq coding-system-alist (cons (list (symbol-name coding-system))
715 coding-system-alist))
717 ;; For a coding system of cateogory iso-8-1 and iso-8-2, create
718 ;; XXX-with-esc variants.
719 (let ((coding-category (coding-system-category coding-system)))
720 (if (or (eq coding-category 'coding-category-iso-8-1)
721 (eq coding-category 'coding-category-iso-8-2))
722 (let ((esc (intern (concat (symbol-name coding-system) "-with-esc")))
723 (doc (format "Same as %s but can handle any charsets by ISO's escape sequences." coding-system)))
724 (make-coding-system esc type mnemonic doc
725 (if (listp (car flags))
726 (cons (append (car flags) '(t)) (cdr flags))
727 (cons (list (car flags) t) (cdr flags)))
729 (coding-system-put esc 'mime-charset nil)
730 (coding-system-put esc 'safe-charsets t))))
734 (defun define-coding-system-alias (alias coding-system)
735 "Define ALIAS as an alias for coding system CODING-SYSTEM."
736 (put alias 'coding-system (coding-system-spec coding-system))
737 (nconc (coding-system-get alias 'alias-coding-systems) (list alias))
738 (add-to-coding-system-list alias)
739 (setq coding-system-alist (cons (list (symbol-name alias))
740 coding-system-alist))
741 (let ((eol-type (coding-system-eol-type coding-system)))
742 (if (vectorp eol-type)
743 (put alias 'eol-type (make-subsidiary-coding-system alias))
744 (put alias 'eol-type eol-type))))
746 (defun set-buffer-file-coding-system (coding-system &optional force)
747 "Set the file coding-system of the current buffer to CODING-SYSTEM.
748 This means that when you save the buffer, it will be converted
749 according to CODING-SYSTEM. For a list of possible values of CODING-SYSTEM,
750 use \\[list-coding-systems].
752 If the buffer's previous file coding-system value specifies end-of-line
753 conversion, and CODING-SYSTEM does not specify one, CODING-SYSTEM is
754 merged with the already-specified end-of-line conversion.
755 However, if the optional prefix argument FORCE is non-nil,
756 then CODING-SYSTEM is used exactly as specified."
757 (interactive "zCoding system for visited file (default, nil): \nP")
758 (check-coding-system coding-system)
760 (let ((x (coding-system-eol-type buffer-file-coding-system))
761 (y (coding-system-eol-type coding-system)))
762 (if (and (numberp x) (>= x 0) (<= x 2) (vectorp y))
763 (setq coding-system (aref y x)))))
764 (setq buffer-file-coding-system coding-system)
765 (set-buffer-modified-p t)
766 (force-mode-line-update))
768 (defvar default-terminal-coding-system nil
769 "Default value for the terminal coding system.
770 This is normally set according to the selected language environment.
771 See also the command `set-terminal-coding-system'.")
773 (defun set-terminal-coding-system (coding-system)
774 "Set coding system of your terminal to CODING-SYSTEM.
775 All text output to the terminal will be encoded
776 with the specified coding system.
777 For a list of possible values of CODING-SYSTEM, use \\[list-coding-systems].
778 The default is determined by the selected language environment
779 or by the previous use of this command."
781 (list (let ((default (if (and (not (terminal-coding-system))
782 default-terminal-coding-system)
783 default-terminal-coding-system)))
785 (format "Coding system for terminal display (default, %s): "
788 (if (and (not coding-system)
789 (not (terminal-coding-system)))
790 (setq coding-system default-terminal-coding-system))
792 (setq default-terminal-coding-system coding-system))
793 (set-terminal-coding-system-internal coding-system)
794 (redraw-frame (selected-frame)))
796 (defvar default-keyboard-coding-system nil
797 "Default value of the keyboard coding system.
798 This is normally set according to the selected language environment.
799 See also the command `set-keyboard-coding-system'.")
801 (defun set-keyboard-coding-system (coding-system)
802 "Set coding system for keyboard input to CODING-SYSTEM.
803 In addition, this command enables Encoded-kbd minor mode.
804 \(If CODING-SYSTEM is nil, Encoded-kbd mode is turned off.)
805 For a list of possible values of CODING-SYSTEM, use \\[list-coding-systems].
806 The default is determined by the selected language environment
807 or by the previous use of this command."
809 (list (let ((default (if (and (not (keyboard-coding-system))
810 default-keyboard-coding-system)
811 default-keyboard-coding-system)))
813 (format "Coding system for keyboard input (default, %s): "
816 (if (and (not coding-system)
817 (not (keyboard-coding-system)))
818 (setq coding-system default-keyboard-coding-system))
820 (setq default-keyboard-coding-system coding-system))
821 (set-keyboard-coding-system-internal coding-system)
822 (encoded-kbd-mode (if coding-system 1 0)))
824 (defun set-buffer-process-coding-system (decoding encoding)
825 "Set coding systems for the process associated with the current buffer.
826 DECODING is the coding system to be used to decode input from the process,
827 ENCODING is the coding system to be used to encode output to the process.
829 For a list of possible values of CODING-SYSTEM, use \\[list-coding-systems]."
831 "zCoding-system for process input: \nzCoding-system for process output: ")
832 (let ((proc (get-buffer-process (current-buffer))))
835 (check-coding-system decoding)
836 (check-coding-system encoding)
837 (set-process-coding-system proc decoding encoding)))
838 (force-mode-line-update))
840 (defalias 'set-clipboard-coding-system 'set-selection-coding-system)
842 (defun set-selection-coding-system (coding-system)
843 "Make CODING-SYSTEM used for communicating with other X clients .
844 When sending or receiving text via cut_buffer, selection, and clipboard,
845 the text is encoded or decoded by CODING-SYSTEM."
846 (interactive "zCoding system for X selection: ")
847 (check-coding-system coding-system)
848 (setq selection-coding-system coding-system))
850 ;; Coding system lastly specified by the command
851 ;; set-next-selection-coding-system.
852 (defvar last-next-selection-coding-system nil)
854 (defun set-next-selection-coding-system (coding-system)
855 "Make CODING-SYSTEM used for the next communication with other X clients.
856 This setting is effective for the next communication only."
858 (list (read-coding-system
859 (if last-next-selection-coding-system
860 (format "Coding system for the next X selection (default, %S): "
861 last-next-selection-coding-system)
862 "Coding system for the next X selection: ")
863 last-next-selection-coding-system)))
865 (setq last-next-selection-coding-system coding-system)
866 (setq coding-system last-next-selection-coding-system))
867 (check-coding-system coding-system)
869 (setq next-selection-coding-system coding-system))
871 (defun set-coding-priority (arg)
872 "Set priority of coding categories according to LIST.
873 LIST is a list of coding categories ordered by priority."
875 (current-list (copy-sequence coding-category-list)))
876 ;; Check the validity of ARG while deleting coding categories in
877 ;; ARG from CURRENT-LIST. We assume that CODING-CATEGORY-LIST
878 ;; contains all coding categories.
880 (if (or (null (get (car l) 'coding-category-index))
881 (null (memq (car l) current-list)))
882 (error "Invalid or duplicated element in argument: %s" arg))
883 (setq current-list (delq (car l) current-list))
885 ;; Update `coding-category-list' and return it.
886 (setq coding-category-list (append arg current-list))
887 (set-coding-priority-internal)))
891 (defvar auto-coding-alist
892 '(("\\.\\(arc\\|zip\\|lzh\\|zoo\\|jar\\|tar\\|tgz\\)\\'" . no-conversion)
893 ("\\.\\(ARC\\|ZIP\\|LZH\\|ZOO\\|JAR\\|TAR\\|TGZ\\)\\'" . no-conversion))
894 "Alist of filename patterns vs corresponding coding systems.
895 Each element looks like (REGEXP . CODING-SYSTEM).
896 A file whose name matches REGEXP is decoded by CODING-SYSTEM on reading.
898 The settings in this alist take priority over `coding:' tags
899 in the file (see the function `set-auto-coding')
900 and the contents of `file-coding-system-alist'.")
902 (defvar set-auto-coding-for-load nil
903 "Non-nil means look for `load-coding' property instead of `coding'.
904 This is used for loading and byte-compiling Emacs Lisp files.")
906 (defun auto-coding-alist-lookup (filename)
907 "Return the coding system specified by `auto-coding-alist' for FILENAME."
908 (let ((alist auto-coding-alist)
909 (case-fold-search (memq system-type '(vax-vms windows-nt ms-dos)))
911 (while (and alist (not coding-system))
912 (if (string-match (car (car alist)) filename)
913 (setq coding-system (cdr (car alist)))
914 (setq alist (cdr alist))))
917 (defun set-auto-coding (filename size)
918 "Return coding system for a file FILENAME of which SIZE bytes follow point.
919 These bytes should include at least the first 1k of the file
920 and the last 3k of the file, but the middle may be omitted.
922 It checks FILENAME against the variable `auto-coding-alist'.
923 If FILENAME doesn't match any entries in the variable,
924 it checks for a `coding:' tag in the first one or two lines following
925 point. If no `coding:' tag is found, it checks for local variables
926 list in the last 3K bytes out of the SIZE bytes.
928 The return value is the specified coding system,
929 or nil if nothing specified.
931 The variable `set-auto-coding-function' (which see) is set to this
932 function by default."
933 (let ((coding-system (auto-coding-alist-lookup filename)))
936 (let* ((case-fold-search t)
938 (head-end (+ head-start (min size 1024)))
939 (tail-start (+ head-start (max (- size 3072) 0)))
940 (tail-end (+ head-start size))
941 coding-system head-found tail-found pos)
942 ;; Try a short cut by searching for the string "coding:"
943 ;; and for "unibyte:" at the head and tail of SIZE bytes.
944 (setq head-found (or (search-forward "coding:" head-end t)
945 (search-forward "unibyte:" head-end t)))
946 (if (and head-found (> head-found tail-start))
947 ;; Head and tail are overlapped.
948 (setq tail-found head-found)
949 (goto-char tail-start)
950 (setq tail-found (or (search-forward "coding:" tail-end t)
951 (search-forward "unibyte:" tail-end t))))
953 ;; At first check the head.
955 (goto-char head-start)
956 (setq pos (re-search-forward "[\n\r]" head-end t))
958 (= (char-after head-start) ?#)
959 (= (char-after (1+ head-start)) ?!))
960 ;; If the file begins with "#!" (exec interpreter magic),
961 ;; look for coding frobs in the first two lines. You cannot
962 ;; necessarily put them in the first line of such a file
963 ;; without screwing up the interpreter invocation.
964 (setq pos (search-forward "\n" head-end t)))
965 (if pos (setq head-end pos))
966 (when (< head-found head-end)
967 (goto-char head-start)
968 (when (and set-auto-coding-for-load
970 "-\\*-\\(.*;\\)?[ \t]*unibyte:[ \t]*\\([^ ;]+\\)"
972 (setq coding-system 'raw-text))
973 (when (and (not coding-system)
975 "-\\*-\\(.*;\\)?[ \t]*coding:[ \t]*\\([^ ;]+\\)"
977 (setq coding-system (intern (match-string 2)))
978 (or (coding-system-p coding-system)
979 (setq coding-system nil)))))
981 ;; If no coding: tag in the head, check the tail.
982 (when (and tail-found (not coding-system))
983 (goto-char tail-start)
984 (search-forward "\n\^L" nil t)
985 (if (re-search-forward
986 "^\\(.*\\)[ \t]*Local Variables:[ \t]*\\(.*\\)$" tail-end t)
987 ;; The prefix is what comes before "local variables:" in its
988 ;; line. The suffix is what comes after "local variables:"
990 (let* ((prefix (regexp-quote (match-string 1)))
991 (suffix (regexp-quote (match-string 2)))
994 "coding[ \t]*:[ \t]*\\([^ \t]+\\)[ \t]*"
998 "unibyte[ \t]*:[ \t]*\\([^ \t]+\\)[ \t]*"
1001 "^" prefix "end *:[ \t]*" suffix "$"))
1003 (re-search-forward re-end tail-end 'move)
1004 (setq tail-end (point))
1006 (when (and set-auto-coding-for-load
1007 (re-search-forward re-unibyte tail-end t))
1008 (setq coding-system 'raw-text))
1009 (when (and (not coding-system)
1010 (re-search-forward re-coding tail-end t))
1011 (setq coding-system (intern (match-string 1)))
1012 (or (coding-system-p coding-system)
1013 (setq coding-system nil))))))
1016 (setq set-auto-coding-function 'set-auto-coding)
1018 ;; Set buffer-file-coding-system of the current buffer after some text
1020 (defun after-insert-file-set-buffer-file-coding-system (inserted)
1021 (if last-coding-system-used
1022 (let ((coding-system
1023 (find-new-buffer-file-coding-system last-coding-system-used))
1024 (modified-p (buffer-modified-p)))
1026 (set-buffer-file-coding-system coding-system)
1027 (if (and enable-multibyte-characters
1028 (or (eq coding-system 'no-conversion)
1029 (eq (coding-system-type coding-system) 5))
1030 ;; If buffer was unmodified, we must be visiting it.
1032 ;; For coding systems no-conversion and raw-text...,
1033 ;; edit the buffer as unibyte.
1034 (let ((pos-byte (position-bytes (+ (point) inserted))))
1035 (set-buffer-multibyte nil)
1036 (setq inserted (- pos-byte (position-bytes (point))))))
1037 (set-buffer-modified-p modified-p))))
1040 (add-hook 'after-insert-file-functions
1041 'after-insert-file-set-buffer-file-coding-system)
1043 ;; The coding-spec and eol-type of coding-system returned is decided
1044 ;; independently in the following order.
1045 ;; 1. That of buffer-file-coding-system locally bound.
1046 ;; 2. That of CODING.
1048 (defun find-new-buffer-file-coding-system (coding)
1049 "Return a coding system for a buffer when a file of CODING is inserted.
1050 The local variable `buffer-file-coding-system' of the current buffer
1051 is set to the returned value.
1052 Return nil if there's no need to set `buffer-file-coding-system'."
1053 (let (local-coding local-eol
1054 found-coding found-eol
1057 ;; Nothing found about coding.
1060 ;; Get information of `buffer-file-coding-system' in LOCAL-EOL
1061 ;; and LOCAL-CODING.
1062 (setq local-eol (coding-system-eol-type buffer-file-coding-system))
1063 (if (null (numberp local-eol))
1064 ;; But eol-type is not yet set.
1065 (setq local-eol nil))
1066 (if (and buffer-file-coding-system
1067 (not (eq (coding-system-type buffer-file-coding-system) t)))
1068 ;; This is not `undecided'.
1069 (setq local-coding (coding-system-base buffer-file-coding-system)))
1071 (if (and (local-variable-p 'buffer-file-coding-system)
1072 local-eol local-coding)
1073 ;; The current buffer has already set full coding-system, we
1074 ;; had better not change it.
1077 (setq found-eol (coding-system-eol-type coding))
1078 (if (null (numberp found-eol))
1079 ;; But eol-type is not found.
1080 ;; If EOL conversions are inhibited, force unix eol-type.
1081 (setq found-eol (if inhibit-eol-conversion 0)))
1082 (if (eq (coding-system-type coding) t)
1083 (setq found-coding 'undecided)
1084 (setq found-coding (coding-system-base coding)))
1086 (if (and (not found-eol) (eq found-coding 'undecided))
1087 ;; No valid coding information found.
1090 ;; Some coding information (eol or text) found.
1092 ;; The local setting takes precedence over the found one.
1093 (setq new-coding (if (local-variable-p 'buffer-file-coding-system)
1094 (or local-coding found-coding)
1095 (or found-coding local-coding)))
1096 (setq new-eol (if (local-variable-p 'buffer-file-coding-system)
1097 (or local-eol found-eol)
1098 (or found-eol local-eol)))
1100 (let ((eol-type (coding-system-eol-type new-coding)))
1101 (if (and (numberp new-eol) (vectorp eol-type))
1102 (aref eol-type new-eol)
1105 (defun modify-coding-system-alist (target-type regexp coding-system)
1106 "Modify one of look up tables for finding a coding system on I/O operation.
1107 There are three of such tables, `file-coding-system-alist',
1108 `process-coding-system-alist', and `network-coding-system-alist'.
1110 TARGET-TYPE specifies which of them to modify.
1111 If it is `file', it affects `file-coding-system-alist' (which see).
1112 If it is `process', it affects `process-coding-system-alist' (which see).
1113 If it is `network', it affects `network-coding-system-alist' (which see).
1115 REGEXP is a regular expression matching a target of I/O operation.
1116 The target is a file name if TARGET-TYPE is `file', a program name if
1117 TARGET-TYPE is `process', or a network service name or a port number
1118 to connect to if TARGET-TYPE is `network'.
1120 CODING-SYSTEM is a coding system to perform code conversion on the I/O
1121 operation, or a cons cell (DECODING . ENCODING) specifying the coding systems
1122 for decoding and encoding respectively,
1123 or a function symbol which, when called, returns such a cons cell."
1124 (or (memq target-type '(file process network))
1125 (error "Invalid target type: %s" target-type))
1126 (or (stringp regexp)
1127 (and (eq target-type 'network) (integerp regexp))
1128 (error "Invalid regular expression: %s" regexp))
1129 (if (symbolp coding-system)
1130 (if (not (fboundp coding-system))
1132 (check-coding-system coding-system)
1133 (setq coding-system (cons coding-system coding-system))))
1134 (check-coding-system (car coding-system))
1135 (check-coding-system (cdr coding-system)))
1136 (cond ((eq target-type 'file)
1137 (let ((slot (assoc regexp file-coding-system-alist)))
1139 (setcdr slot coding-system)
1140 (setq file-coding-system-alist
1141 (cons (cons regexp coding-system)
1142 file-coding-system-alist)))))
1143 ((eq target-type 'process)
1144 (let ((slot (assoc regexp process-coding-system-alist)))
1146 (setcdr slot coding-system)
1147 (setq process-coding-system-alist
1148 (cons (cons regexp coding-system)
1149 process-coding-system-alist)))))
1151 (let ((slot (assoc regexp network-coding-system-alist)))
1153 (setcdr slot coding-system)
1154 (setq network-coding-system-alist
1155 (cons (cons regexp coding-system)
1156 network-coding-system-alist)))))))
1158 (defun make-translation-table (&rest args)
1159 "Make a translation table (char table) from arguments.
1160 Each argument is a list of the form (FROM . TO),
1161 where FROM is a character to be translated to TO.
1163 FROM can be a generic character (see `make-char'). In this case, TO is
1164 a generic character containing the same number of characters, or a
1165 ordinary character. If FROM and TO are both generic characters, all
1166 characters belonging to FROM are translated to characters belonging to TO
1167 without changing their position code(s)."
1168 (let ((table (make-char-table 'translation-table))
1171 (let ((elts (car args)))
1173 (let* ((from (car (car elts)))
1174 (from-i 0) ; degree of freedom of FROM
1175 (from-rev (nreverse (split-char from)))
1176 (to (cdr (car elts)))
1177 (to-i 0) ; degree of freedom of TO
1178 (to-rev (nreverse (split-char to))))
1179 ;; Check numbers of heading 0s in FROM-REV and TO-REV.
1180 (while (eq (car from-rev) 0)
1181 (setq from-i (1+ from-i) from-rev (cdr from-rev)))
1182 (while (eq (car to-rev) 0)
1183 (setq to-i (1+ to-i) to-rev (cdr to-rev)))
1184 (if (and (/= from-i to-i) (/= to-i 0))
1185 (error "Invalid character pair (%d . %d)" from to))
1186 ;; If we have already translated TO to TO-ALT, FROM should
1187 ;; also be translated to TO-ALT. But, this is only if TO
1188 ;; is a generic character or TO-ALT is not a generic
1190 (let ((to-alt (aref table to)))
1192 (or (> to-i 0) (not (generic-char-p to-alt))))
1195 (set-char-table-default table from to)
1196 (aset table from to))
1197 ;; If we have already translated some chars to FROM, they
1198 ;; should also be translated to TO.
1199 (let ((l (assq from revlist)))
1206 (setq l (cdr l)) ))))
1207 ;; Now update REVLIST.
1208 (let ((l (assq to revlist)))
1210 (setcdr l (cons from (cdr l)))
1211 (setq revlist (cons (list to from) revlist)))))
1212 (setq elts (cdr elts))))
1213 (setq args (cdr args)))
1214 ;; Return TABLE just created.
1217 (defun make-translation-table-from-vector (vec)
1218 "Make translation table from decoding vector VEC.
1219 VEC is an array of 256 elements to map unibyte codes to multibyte characters.
1220 See also the variable `nonascii-translation-table'."
1221 (let ((table (make-char-table 'translation-table))
1222 (rev-table (make-char-table 'translation-table))
1226 (setq ch (aref vec i))
1229 (aset rev-table ch i))
1231 (set-char-table-extra-slot table 0 rev-table)
1234 (defun define-translation-table (symbol &rest args)
1235 "Define SYMBOL as a name of translation table made by ARGS.
1237 If the first element of ARGS is a char-table of which purpose is
1238 translation-table, just define SYMBOL as the name of it.
1240 In the other case, ARGS are the same as arguments to the function
1241 `make-translation-table' (which see).
1243 This function sets properties `translation-table' and
1244 `translation-table-id' of SYMBOL to the created table itself and
1245 identification number of the table respectively."
1246 (let ((table (if (and (char-table-p (car args))
1247 (eq (char-table-subtype (car args))
1248 'translation-table))
1250 (apply 'make-translation-table args)))
1251 (len (length translation-table-vector))
1254 (put symbol 'translation-table table)
1257 (setq translation-table-vector
1258 (vconcat translation-table-vector (make-vector len nil))))
1259 (let ((slot (aref translation-table-vector id)))
1261 (eq (car slot) symbol))
1263 (aset translation-table-vector id (cons symbol table))
1265 (setq id (1+ id)))))
1266 (put symbol 'translation-table-id id)
1269 ;;; Initialize some variables.
1271 (put 'use-default-ascent 'char-table-extra-slots 0)
1272 (setq use-default-ascent (make-char-table 'use-default-ascent))
1273 (put 'ignore-relative-composition 'char-table-extra-slots 0)
1274 (setq ignore-relative-composition
1275 (make-char-table 'ignore-relative-composition))
1280 ;;; mule.el ends here