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4ed46869 KH |
1 | ;;; mule.el --- basic commands for mulitilingual environment |
2 | ||
4ed46869 | 3 | ;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN. |
58cfed09 | 4 | ;; Licensed to the Free Software Foundation. |
4ed46869 KH |
5 | |
6 | ;; Keywords: mule, multilingual, character set, coding system | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
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) | |
13 | ;; any later version. | |
14 | ||
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. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
369314dc KH |
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. | |
4ed46869 KH |
24 | |
25 | ;;; Code: | |
26 | ||
d2542b42 | 27 | (defconst mule-version "5.0 (SAKAKI)" "\ |
4ed46869 KH |
28 | Version number and name of this version of MULE (multilingual environment).") |
29 | ||
35554641 | 30 | (defconst mule-version-date "1999.12.7" "\ |
4ed46869 KH |
31 | Distribution date of this version of MULE (multilingual environment).") |
32 | ||
33 | (defun load-with-code-conversion (fullname file &optional noerror nomessage) | |
0f69cb38 KH |
34 | "Execute a file of Lisp code named FILE whose absolute name is FULLNAME. |
35 | The file contents are decoded before evaluation if necessary. | |
4ed46869 KH |
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)) | |
42 | (and (null noerror) | |
43 | (signal 'file-error (list "Cannot open load file" file))) | |
44 | ;; Read file with code conversion, and then eval. | |
45 | (let* ((buffer | |
46 | ;; To avoid any autoloading, set default-major-mode to | |
47 | ;; fundamental-mode. | |
88162676 RS |
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)) | |
4ed46869 KH |
54 | ;; We can't use `generate-new-buffer' because files.el |
55 | ;; is not yet loaded. | |
56 | (get-buffer-create (generate-new-buffer-name " *load*")))) | |
db5cae4b SM |
57 | (load-in-progress t) |
58 | (source (save-match-data (string-match "\\.el\\'" fullname)))) | |
59 | (unless nomessage | |
60 | (if source | |
61 | (message "Loading %s (source)..." file) | |
62 | (message "Loading %s..." file))) | |
63 | (when purify-flag | |
64 | (setq preloaded-file-list (cons file preloaded-file-list))) | |
4ed46869 | 65 | (unwind-protect |
a6acd8a2 | 66 | (let ((load-file-name fullname) |
1c4cc63a | 67 | (set-auto-coding-for-load t) |
a6acd8a2 | 68 | (inhibit-file-name-operation nil)) |
4ed46869 KH |
69 | (save-excursion |
70 | (set-buffer buffer) | |
71 | (insert-file-contents fullname) | |
7d276780 EZ |
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)) | |
4ed46869 KH |
80 | ;; Make `kill-buffer' quiet. |
81 | (set-buffer-modified-p nil)) | |
0f69cb38 | 82 | ;; Have the original buffer current while we eval. |
88162676 RS |
83 | (eval-buffer buffer nil file |
84 | ;; If this Emacs is running with --unibyte, | |
85 | ;; convert multibyte strings to unibyte | |
86 | ;; after reading them. | |
ba74e833 | 87 | ;; (not default-enable-multibyte-characters) |
8dd08b5b | 88 | nil t |
ba74e833 | 89 | )) |
cfc70cdf RS |
90 | (let (kill-buffer-hook kill-buffer-query-functions) |
91 | (kill-buffer buffer))) | |
4ed46869 | 92 | (let ((hook (assoc file after-load-alist))) |
db5cae4b SM |
93 | (when hook |
94 | (mapcar (function eval) (cdr hook)))) | |
95 | (unless (or nomessage noninteractive) | |
96 | (if source | |
97 | (message "Loading %s (source)...done" file) | |
98 | (message "Loading %s...done" file))) | |
4ed46869 KH |
99 | t))) |
100 | ||
101 | ;; API (Application Program Interface) for charsets. | |
102 | ||
2e02a76f RS |
103 | ;; Return t if OBJ is a quoted symbol |
104 | ;; and the symbol is the name of a standard charset. | |
105 | (defsubst charset-quoted-standard-p (obj) | |
106 | (and (listp obj) (eq (car obj) 'quote) | |
107 | (symbolp (car-safe (cdr obj))) | |
108 | (let ((vector (get (car-safe (cdr obj)) 'charset))) | |
109 | (and (vectorp vector) | |
110 | (< (aref vector 0) 160))))) | |
4ed46869 KH |
111 | |
112 | (defsubst charsetp (object) | |
e4a7fdfc | 113 | "T if OBJECT is a charset." |
4ed46869 KH |
114 | (and (symbolp object) (vectorp (get object 'charset)))) |
115 | ||
116 | (defsubst charset-info (charset) | |
117 | "Return a vector of information of CHARSET. | |
118 | The elements of the vector are: | |
119 | CHARSET-ID, BYTES, DIMENSION, CHARS, WIDTH, DIRECTION, | |
120 | LEADING-CODE-BASE, LEADING-CODE-EXT, | |
121 | ISO-FINAL-CHAR, ISO-GRAPHIC-PLANE, | |
122 | REVERSE-CHARSET, SHORT-NAME, LONG-NAME, DESCRIPTION, | |
123 | PLIST, | |
124 | where | |
125 | CHARSET-ID (integer) is the identification number of the charset. | |
aa8bb645 KH |
126 | BYTES (integer) is the length of multi-byte form of a character in |
127 | the charset: one of 1, 2, 3, and 4. | |
4ed46869 KH |
128 | DIMENSION (integer) is the number of bytes to represent a character of |
129 | the charset: 1 or 2. | |
130 | CHARS (integer) is the number of characters in a dimension: 94 or 96. | |
4ed46869 KH |
131 | WIDTH (integer) is the number of columns a character in the charset |
132 | occupies on the screen: one of 0, 1, and 2. | |
133 | DIRECTION (integer) is the rendering direction of characters in the | |
08b4ace5 KH |
134 | charset when rendering. If 0, render from left to right, else |
135 | render from right to left. | |
4ed46869 KH |
136 | LEADING-CODE-BASE (integer) is the base leading-code for the |
137 | charset. | |
138 | LEADING-CODE-EXT (integer) is the extended leading-code for the | |
139 | charset. All charsets of less than 0xA0 has the value 0. | |
140 | ISO-FINAL-CHAR (character) is the final character of the | |
7dd4c92d KH |
141 | corresponding ISO 2022 charset. If the charset is not assigned |
142 | any final character, the value is -1. | |
4ed46869 KH |
143 | ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked |
144 | while encoding to variants of ISO 2022 coding system, one of the | |
145 | following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR). | |
7dd4c92d | 146 | If the charset is not assigned any final character, the value is -1. |
4ed46869 KH |
147 | REVERSE-CHARSET (integer) is the charset which differs only in |
148 | LEFT-TO-RIGHT value from the charset. If there's no such a | |
149 | charset, the value is -1. | |
150 | SHORT-NAME (string) is the short name to refer to the charset. | |
151 | LONG-NAME (string) is the long name to refer to the charset | |
152 | DESCRIPTION (string) is the description string of the charset. | |
153 | PLIST (property list) may contain any type of information a user | |
154 | want to put and get by functions `put-charset-property' and | |
155 | `get-charset-property' respectively." | |
156 | (get charset 'charset)) | |
157 | ||
40c81f74 PE |
158 | ;; It is better not to use backquote in this file, |
159 | ;; because that makes a bootstrapping problem | |
160 | ;; if you need to recompile all the Lisp files using interpreted code. | |
161 | ||
4ed46869 KH |
162 | (defmacro charset-id (charset) |
163 | "Return charset identification number of CHARSET." | |
2e02a76f | 164 | (if (charset-quoted-standard-p charset) |
4ed46869 | 165 | (aref (charset-info (nth 1 charset)) 0) |
40c81f74 | 166 | (list 'aref (list 'charset-info charset) 0))) |
4ed46869 KH |
167 | |
168 | (defmacro charset-bytes (charset) | |
900dc6e3 KH |
169 | "Return bytes of CHARSET. |
170 | See the function `charset-info' for more detail." | |
2e02a76f | 171 | (if (charset-quoted-standard-p charset) |
4ed46869 | 172 | (aref (charset-info (nth 1 charset)) 1) |
40c81f74 | 173 | (list 'aref (list 'charset-info charset) 1))) |
4ed46869 KH |
174 | |
175 | (defmacro charset-dimension (charset) | |
900dc6e3 KH |
176 | "Return dimension of CHARSET. |
177 | See the function `charset-info' for more detail." | |
2e02a76f | 178 | (if (charset-quoted-standard-p charset) |
4ed46869 | 179 | (aref (charset-info (nth 1 charset)) 2) |
40c81f74 | 180 | (list 'aref (list 'charset-info charset) 2))) |
4ed46869 KH |
181 | |
182 | (defmacro charset-chars (charset) | |
900dc6e3 KH |
183 | "Return character numbers contained in a dimension of CHARSET. |
184 | See the function `charset-info' for more detail." | |
2e02a76f | 185 | (if (charset-quoted-standard-p charset) |
4ed46869 | 186 | (aref (charset-info (nth 1 charset)) 3) |
40c81f74 | 187 | (list 'aref (list 'charset-info charset) 3))) |
4ed46869 KH |
188 | |
189 | (defmacro charset-width (charset) | |
900dc6e3 KH |
190 | "Return width (how many column occupied on a screen) of CHARSET. |
191 | See the function `charset-info' for more detail." | |
2e02a76f | 192 | (if (charset-quoted-standard-p charset) |
4ed46869 | 193 | (aref (charset-info (nth 1 charset)) 4) |
40c81f74 | 194 | (list 'aref (list 'charset-info charset) 4))) |
4ed46869 KH |
195 | |
196 | (defmacro charset-direction (charset) | |
900dc6e3 KH |
197 | "Return direction of CHARSET. |
198 | See the function `charset-info' for more detail." | |
2e02a76f | 199 | (if (charset-quoted-standard-p charset) |
4ed46869 | 200 | (aref (charset-info (nth 1 charset)) 5) |
40c81f74 | 201 | (list 'aref (list 'charset-info charset) 5))) |
4ed46869 KH |
202 | |
203 | (defmacro charset-iso-final-char (charset) | |
900dc6e3 KH |
204 | "Return final char of CHARSET. |
205 | See the function `charset-info' for more detail." | |
2e02a76f | 206 | (if (charset-quoted-standard-p charset) |
4ed46869 | 207 | (aref (charset-info (nth 1 charset)) 8) |
40c81f74 | 208 | (list 'aref (list 'charset-info charset) 8))) |
4ed46869 KH |
209 | |
210 | (defmacro charset-iso-graphic-plane (charset) | |
900dc6e3 KH |
211 | "Return graphic plane of CHARSET. |
212 | See the function `charset-info' for more detail." | |
2e02a76f | 213 | (if (charset-quoted-standard-p charset) |
4ed46869 | 214 | (aref (charset-info (nth 1 charset)) 9) |
40c81f74 | 215 | (list 'aref (list 'charset-info charset) 9))) |
4ed46869 KH |
216 | |
217 | (defmacro charset-reverse-charset (charset) | |
900dc6e3 KH |
218 | "Return reverse charset of CHARSET. |
219 | See the function `charset-info' for more detail." | |
2e02a76f | 220 | (if (charset-quoted-standard-p charset) |
4ed46869 | 221 | (aref (charset-info (nth 1 charset)) 10) |
40c81f74 | 222 | (list 'aref (list 'charset-info charset) 10))) |
4ed46869 KH |
223 | |
224 | (defmacro charset-short-name (charset) | |
900dc6e3 KH |
225 | "Return short name of CHARSET. |
226 | See the function `charset-info' for more detail." | |
2e02a76f | 227 | (if (charset-quoted-standard-p charset) |
4ed46869 | 228 | (aref (charset-info (nth 1 charset)) 11) |
40c81f74 | 229 | (list 'aref (list 'charset-info charset) 11))) |
4ed46869 KH |
230 | |
231 | (defmacro charset-long-name (charset) | |
900dc6e3 KH |
232 | "Return long name of CHARSET. |
233 | See the function `charset-info' for more detail." | |
2e02a76f | 234 | (if (charset-quoted-standard-p charset) |
4ed46869 | 235 | (aref (charset-info (nth 1 charset)) 12) |
40c81f74 | 236 | (list 'aref (list 'charset-info charset) 12))) |
4ed46869 KH |
237 | |
238 | (defmacro charset-description (charset) | |
0611934b | 239 | "Return description of CHARSET. |
900dc6e3 | 240 | See the function `charset-info' for more detail." |
2e02a76f | 241 | (if (charset-quoted-standard-p charset) |
4ed46869 | 242 | (aref (charset-info (nth 1 charset)) 13) |
40c81f74 | 243 | (list 'aref (list 'charset-info charset) 13))) |
4ed46869 KH |
244 | |
245 | (defmacro charset-plist (charset) | |
900dc6e3 KH |
246 | "Return list charset property of CHARSET. |
247 | See the function `charset-info' for more detail." | |
40c81f74 PE |
248 | (list 'aref |
249 | (if (charset-quoted-standard-p charset) | |
250 | (charset-info (nth 1 charset)) | |
251 | (list 'charset-info charset)) | |
252 | 14)) | |
4ed46869 KH |
253 | |
254 | (defun set-charset-plist (charset plist) | |
e8dd0160 | 255 | "Set CHARSET's property list to PLIST, and return PLIST." |
4ed46869 KH |
256 | (aset (charset-info charset) 14 plist)) |
257 | ||
d3e7e7cf EZ |
258 | (defun make-char (charset &optional code1 code2) |
259 | "Return a character of CHARSET whose position codes are CODE1 and CODE2. | |
f98e2797 | 260 | CODE1 and CODE2 are optional, but if you don't supply |
a9fb0b58 KH |
261 | sufficient position codes, return a generic character which stands for |
262 | all characters or group of characters in the character set. | |
d3e7e7cf | 263 | A generic character can be used to index a char table (e.g. syntax-table). |
9ff05eae KH |
264 | |
265 | Such character sets as ascii, eight-bit-control, and eight-bit-graphic | |
266 | don't have corresponding generic characters. If CHARSET is one of | |
267 | them and you don't supply CODE1, return the character of the smallest | |
268 | code in CHARSET. | |
269 | ||
d3e7e7cf | 270 | If CODE1 or CODE2 are invalid (out of range), this function signals an error." |
636799f2 | 271 | (make-char-internal (charset-id charset) code1 code2)) |
a6acd8a2 KH |
272 | |
273 | (put 'make-char 'byte-compile | |
274 | (function | |
275 | (lambda (form) | |
276 | (let ((charset (nth 1 form))) | |
277 | (if (charset-quoted-standard-p charset) | |
278 | (byte-compile-normal-call | |
279 | (cons 'make-char-internal | |
280 | (cons (charset-id (nth 1 charset)) (nthcdr 2 form)))) | |
281 | (byte-compile-normal-call | |
282 | (cons 'make-char-internal | |
283 | (cons (list 'charset-id charset) (nthcdr 2 form))))))))) | |
4ed46869 | 284 | |
d3675a42 | 285 | (defun charset-list () |
900dc6e3 KH |
286 | "Return list of charsets ever defined. |
287 | ||
d3675a42 | 288 | This function is provided for backward compatibility. |
900dc6e3 | 289 | Now we have the variable `charset-list'." |
d3675a42 KH |
290 | charset-list) |
291 | ||
13d5617d KH |
292 | (defsubst generic-char-p (char) |
293 | "Return t if and only if CHAR is a generic character. | |
294 | See also the documentation of make-char." | |
1d935669 KH |
295 | (and (>= char 0400) |
296 | (let ((l (split-char char))) | |
297 | (and (or (= (nth 1 l) 0) (eq (nth 2 l) 0)) | |
298 | (not (eq (car l) 'composition)))))) | |
69eba008 | 299 | |
cc57cc54 | 300 | (defun decode-char (ccs code-point &optional restriction) |
7f341749 | 301 | "Return character specified by coded character set CCS and CODE-POINT in it. |
cc57cc54 | 302 | Return nil if such a character is not supported. |
e76938e7 DL |
303 | Currently the only supported coded character set is `ucs' (ISO/IEC |
304 | 10646: Universal Multi-Octet Coded Character Set). | |
cc57cc54 KH |
305 | |
306 | Optional argument RESTRICTION specifies a way to map the pair of CCS | |
307 | and CODE-POINT to a chracter. Currently not supported and just ignored." | |
308 | (cond ((eq ccs 'ucs) | |
6ba9b20b | 309 | (cond ((< code-point 160) |
cc57cc54 KH |
310 | code-point) |
311 | ((< code-point 256) | |
312 | (make-char 'latin-iso8859-1 code-point)) | |
313 | ((< code-point #x2500) | |
314 | (setq code-point (- code-point #x0100)) | |
315 | (make-char 'mule-unicode-0100-24ff | |
316 | (+ (/ code-point 96) 32) (+ (% code-point 96) 32))) | |
6ba9b20b | 317 | ((< code-point #x3400) |
cc57cc54 KH |
318 | (setq code-point (- code-point #x2500)) |
319 | (make-char 'mule-unicode-2500-33ff | |
320 | (+ (/ code-point 96) 32) (+ (% code-point 96) 32))) | |
321 | ((and (>= code-point #xe000) (< code-point #x10000)) | |
322 | (setq code-point (- code-point #xe000)) | |
323 | (make-char 'mule-unicode-e000-ffff | |
324 | (+ (/ code-point 96) 32) (+ (% code-point 96) 32))) | |
325 | )))) | |
326 | ||
327 | (defun encode-char (char ccs &optional restriction) | |
7f341749 | 328 | "Return code-point in coded character set CCS that corresponds to CHAR. |
cc57cc54 | 329 | Return nil if CHAR is not included in CCS. |
e76938e7 DL |
330 | Currently the only supported coded character set is `ucs' (ISO/IEC |
331 | 10646: Universal Multi-Octet Coded Character Set). | |
7f341749 KH |
332 | |
333 | CHAR should be in one of these charsets: | |
cc57cc54 | 334 | ascii, latin-iso8859-1, mule-unicode-0100-24ff, mule-unicode-2500-33ff, |
6ba9b20b | 335 | mule-unicode-e000-ffff, eight-bit-control |
cc57cc54 KH |
336 | Otherwise, return nil. |
337 | ||
338 | Optional argument RESTRICTION specifies a way to map CHAR to a | |
339 | code-point in CCS. Currently not supported and just ignored." | |
340 | (let* ((split (split-char char)) | |
341 | (charset (car split))) | |
342 | (cond ((eq ccs 'ucs) | |
343 | (cond ((eq charset 'ascii) | |
344 | char) | |
345 | ((eq charset 'latin-iso8859-1) | |
346 | (+ (nth 1 split) 128)) | |
347 | ((eq charset 'mule-unicode-0100-24ff) | |
348 | (+ #x0100 (+ (* (- (nth 1 split) 32) 96) | |
349 | (- (nth 2 split) 32)))) | |
350 | ((eq charset 'mule-unicode-2500-33ff) | |
351 | (+ #x2500 (+ (* (- (nth 1 split) 32) 96) | |
352 | (- (nth 2 split) 32)))) | |
353 | ((eq charset 'mule-unicode-e000-ffff) | |
354 | (+ #xe000 (+ (* (- (nth 1 split) 32) 96) | |
6ba9b20b KH |
355 | (- (nth 2 split) 32)))) |
356 | ((eq charset 'eight-bit-control) | |
357 | char)))))) | |
cc57cc54 | 358 | |
0269ddfb | 359 | \f |
e76938e7 | 360 | ;; Coding system stuff |
4ed46869 | 361 | |
8057896b | 362 | ;; Coding system is a symbol that has the property `coding-system'. |
4ed46869 | 363 | ;; |
8057896b KH |
364 | ;; The value of the property `coding-system' is a vector of the |
365 | ;; following format: | |
d3675a42 | 366 | ;; [TYPE MNEMONIC DOC-STRING PLIST FLAGS] |
8057896b | 367 | ;; We call this vector as coding-spec. See comments in src/coding.c |
d3675a42 | 368 | ;; for more detail. |
8057896b KH |
369 | |
370 | (defconst coding-spec-type-idx 0) | |
371 | (defconst coding-spec-mnemonic-idx 1) | |
372 | (defconst coding-spec-doc-string-idx 2) | |
0269ddfb | 373 | (defconst coding-spec-plist-idx 3) |
8057896b KH |
374 | (defconst coding-spec-flags-idx 4) |
375 | ||
a6acd8a2 KH |
376 | ;; PLIST is a property list of a coding system. To share PLIST among |
377 | ;; alias coding systems, a coding system has PLIST in coding-spec | |
378 | ;; instead of having it in normal property list of Lisp symbol. | |
379 | ;; Here's a list of coding system properties currently being used. | |
0269ddfb KH |
380 | ;; |
381 | ;; o coding-category | |
382 | ;; | |
383 | ;; The value is a coding category the coding system belongs to. The | |
1b46a680 KH |
384 | ;; function `make-coding-system' sets this value automatically |
385 | ;; unless its argument PROPERTIES specifies this property. | |
4ed46869 | 386 | ;; |
0269ddfb | 387 | ;; o alias-coding-systems |
4ed46869 | 388 | ;; |
0269ddfb KH |
389 | ;; The value is a list of coding systems of the same alias group. The |
390 | ;; first element is the coding system made at first, which we call as | |
1b46a680 KH |
391 | ;; `base coding system'. The function `make-coding-system' sets this |
392 | ;; value automatically and `define-coding-system-alias' updates it. | |
0269ddfb KH |
393 | ;; |
394 | ;; o post-read-conversion | |
395 | ;; | |
396 | ;; The value is a function to call after some text is inserted and | |
397 | ;; decoded by the coding system itself and before any functions in | |
398 | ;; `after-insert-functions' are called. The arguments to this | |
399 | ;; function is the same as those of a function in | |
4ed46869 KH |
400 | ;; `after-insert-functions', i.e. LENGTH of a text while putting point |
401 | ;; at the head of the text to be decoded | |
402 | ;; | |
0269ddfb KH |
403 | ;; o pre-write-conversion |
404 | ;; | |
405 | ;; The value is a function to call after all functions in | |
406 | ;; `write-region-annotate-functions' and `buffer-file-format' are | |
407 | ;; called, and before the text is encoded by the coding system itself. | |
408 | ;; The arguments to this function is the same as those of a function | |
409 | ;; in `write-region-annotate-functions', i.e. FROM and TO specifying | |
410 | ;; region of a text. | |
411 | ;; | |
f967223b | 412 | ;; o translation-table-for-decode |
0269ddfb | 413 | ;; |
f967223b KH |
414 | ;; The value is a translation table to be applied on decoding. See |
415 | ;; the function `make-translation-table' for the format of translation | |
416 | ;; table. | |
0269ddfb | 417 | ;; |
f967223b | 418 | ;; o translation-table-for-encode |
0269ddfb | 419 | ;; |
f967223b | 420 | ;; The value is a translation table to be applied on encoding. |
a6acd8a2 | 421 | ;; |
c11a8f77 KH |
422 | ;; o safe-chars |
423 | ;; | |
424 | ;; The value is a char table. If a character has non-nil value in it, | |
425 | ;; the character is safely supported by the coding system. This | |
426 | ;; overrides the specification of safe-charsets. | |
427 | ||
a6acd8a2 KH |
428 | ;; o safe-charsets |
429 | ;; | |
430 | ;; The value is a list of charsets safely supported by the coding | |
431 | ;; system. The value t means that all charsets Emacs handles are | |
432 | ;; supported. Even if some charset is not in this list, it doesn't | |
433 | ;; mean that the charset can't be encoded in the coding system, | |
434 | ;; instead, it just means that some other receiver of a text encoded | |
435 | ;; in the coding system won't be able to handle that charset. | |
b25eef20 KH |
436 | ;; |
437 | ;; o mime-charset | |
438 | ;; | |
439 | ;; The value is a symbol of which name is `MIME-charset' parameter of | |
440 | ;; the coding system. | |
c76b5c99 | 441 | ;; |
1322c8ca KH |
442 | ;; o charset-origin-alist |
443 | ;; | |
444 | ;; The value is a list of this form: | |
445 | ;; (CHARSET EXTERNAL-CHARSET-NAME ENCODING-FUNCTION). | |
446 | ;; ENCODING-FUNCTION is a function to encode a character in CHARSET | |
447 | ;; to the code in EXTERNAL-CHARSET-NAME. The command what-cursor-position | |
448 | ;; uses this information of the buffer-file-coding-system. | |
caa85ad9 KH |
449 | ;; ENCODING-FUNCTION may be a translation table or a symbol whose |
450 | ;; property `translation-table' is a translation table. In these case, | |
451 | ;; the translation table is used to encode the character. | |
1322c8ca | 452 | ;; |
c76b5c99 KH |
453 | ;; o valid-codes (meaningful only for a coding system based on CCL) |
454 | ;; | |
455 | ;; The value is a list to indicate valid byte ranges of the encoded | |
456 | ;; file. Each element of the list is an integer or a cons of integer. | |
457 | ;; In the former case, the integer value is a valid byte code. In the | |
e8dd0160 | 458 | ;; latter case, the integers specifies the range of valid byte codes. |
c76b5c99 | 459 | |
0269ddfb KH |
460 | |
461 | ;; Return coding-spec of CODING-SYSTEM | |
462 | (defsubst coding-system-spec (coding-system) | |
463 | (get (check-coding-system coding-system) 'coding-system)) | |
4ed46869 | 464 | |
4ed46869 | 465 | (defun coding-system-type (coding-system) |
0269ddfb KH |
466 | "Return the coding type of CODING-SYSTEM. |
467 | A coding type is an integer value indicating the encoding method | |
468 | of CODING-SYSTEM. See the function `make-coding-system' for more detail." | |
469 | (aref (coding-system-spec coding-system) coding-spec-type-idx)) | |
4ed46869 | 470 | |
4ed46869 | 471 | (defun coding-system-mnemonic (coding-system) |
0269ddfb | 472 | "Return the mnemonic character of CODING-SYSTEM. |
6e2c8840 KH |
473 | The mnemonic character of a coding system is used in mode line |
474 | to indicate the coding system. If the arg is nil, return ?-." | |
475 | (let ((spec (coding-system-spec coding-system))) | |
476 | (if spec (aref spec coding-spec-mnemonic-idx) ?-))) | |
4ed46869 | 477 | |
8057896b | 478 | (defun coding-system-doc-string (coding-system) |
0269ddfb KH |
479 | "Return the documentation string for CODING-SYSTEM." |
480 | (aref (coding-system-spec coding-system) coding-spec-doc-string-idx)) | |
4ed46869 | 481 | |
d3675a42 | 482 | (defun coding-system-plist (coding-system) |
0269ddfb KH |
483 | "Return the property list of CODING-SYSTEM." |
484 | (aref (coding-system-spec coding-system) coding-spec-plist-idx)) | |
d3675a42 | 485 | |
4ed46869 | 486 | (defun coding-system-flags (coding-system) |
0269ddfb KH |
487 | "Return `flags' of CODING-SYSTEM. |
488 | A `flags' of a coding system is a vector of length 32 indicating detailed | |
489 | information of a coding system. See the function `make-coding-system' | |
490 | for more detail." | |
491 | (aref (coding-system-spec coding-system) coding-spec-flags-idx)) | |
492 | ||
493 | (defun coding-system-get (coding-system prop) | |
494 | "Extract a value from CODING-SYSTEM's property list for property PROP." | |
495 | (plist-get (coding-system-plist coding-system) prop)) | |
496 | ||
497 | (defun coding-system-put (coding-system prop val) | |
498 | "Change value in CODING-SYSTEM's property list PROP to VAL." | |
499 | (let ((plist (coding-system-plist coding-system))) | |
500 | (if plist | |
501 | (plist-put plist prop val) | |
502 | (aset (coding-system-spec coding-system) coding-spec-plist-idx | |
503 | (list prop val))))) | |
504 | ||
505 | (defun coding-system-category (coding-system) | |
506 | "Return the coding category of CODING-SYSTEM." | |
507 | (coding-system-get coding-system 'coding-category)) | |
508 | ||
509 | (defun coding-system-base (coding-system) | |
510 | "Return the base coding system of CODING-SYSTEM. | |
d9e3229d KH |
511 | A base coding system is what made by `make-coding-system'. |
512 | Any alias nor subsidiary coding systems are not base coding system." | |
0269ddfb KH |
513 | (car (coding-system-get coding-system 'alias-coding-systems))) |
514 | ||
515 | (defalias 'coding-system-parent 'coding-system-base) | |
2598a293 | 516 | (make-obsolete 'coding-system-parent 'coding-system-base "20.3") |
0269ddfb KH |
517 | |
518 | ;; Coding system also has a property `eol-type'. | |
519 | ;; | |
520 | ;; This property indicates how the coding system handles end-of-line | |
521 | ;; format. The value is integer 0, 1, 2, or a vector of three coding | |
522 | ;; systems. Each integer value 0, 1, and 2 indicates the format of | |
523 | ;; end-of-line LF, CRLF, and CR respectively. A vector value | |
524 | ;; indicates that the format of end-of-line should be detected | |
525 | ;; automatically. Nth element of the vector is the subsidiary coding | |
526 | ;; system whose `eol-type' property is N. | |
4ed46869 | 527 | |
8057896b | 528 | (defun coding-system-eol-type (coding-system) |
0269ddfb KH |
529 | "Return eol-type of CODING-SYSTEM. |
530 | An eol-type is integer 0, 1, 2, or a vector of coding systems. | |
4ed46869 | 531 | |
0269ddfb KH |
532 | Integer values 0, 1, and 2 indicate a format of end-of-line; LF, |
533 | CRLF, and CR respectively. | |
534 | ||
535 | A vector value indicates that a format of end-of-line should be | |
536 | detected automatically. Nth element of the vector is the subsidiary | |
537 | coding system whose eol-type is N." | |
538 | (get coding-system 'eol-type)) | |
bd882697 | 539 | |
857ea15c AS |
540 | (defun coding-system-lessp (x y) |
541 | (cond ((eq x 'no-conversion) t) | |
542 | ((eq y 'no-conversion) nil) | |
543 | ((eq x 'emacs-mule) t) | |
544 | ((eq y 'emacs-mule) nil) | |
545 | ((eq x 'undecided) t) | |
546 | ((eq y 'undecided) nil) | |
547 | (t (let ((c1 (coding-system-mnemonic x)) | |
548 | (c2 (coding-system-mnemonic y))) | |
549 | (or (< (downcase c1) (downcase c2)) | |
550 | (and (not (> (downcase c1) (downcase c2))) | |
551 | (< c1 c2))))))) | |
552 | ||
553 | ;; Add CODING-SYSTEM to coding-system-list while keeping it sorted. | |
554 | (defun add-to-coding-system-list (coding-system) | |
555 | (if (or (null coding-system-list) | |
556 | (coding-system-lessp coding-system (car coding-system-list))) | |
557 | (setq coding-system-list (cons coding-system coding-system-list)) | |
558 | (let ((len (length coding-system-list)) | |
559 | mid (tem coding-system-list)) | |
560 | (while (> len 1) | |
561 | (setq mid (nthcdr (/ len 2) tem)) | |
562 | (if (coding-system-lessp (car mid) coding-system) | |
563 | (setq tem mid | |
564 | len (- len (/ len 2))) | |
565 | (setq len (/ len 2)))) | |
566 | (setcdr tem (cons coding-system (cdr tem)))))) | |
567 | ||
80a7463d | 568 | (defun coding-system-list (&optional base-only) |
c11a8f77 KH |
569 | "Return a list of all existing non-subsidiary coding systems. |
570 | If optional arg BASE-ONLY is non-nil, only base coding systems are listed. | |
571 | The value doesn't include subsidiary coding systems which are what | |
572 | made from bases and aliases automatically for various end-of-line | |
573 | formats (e.g. iso-latin-1-unix, koi8-r-dos)." | |
80a7463d KH |
574 | (let* ((codings (copy-sequence coding-system-list)) |
575 | (tail (cons nil codings))) | |
576 | ;; Remove subsidiary coding systems (eol variants) and alias | |
577 | ;; coding systems (if necessary). | |
578 | (while (cdr tail) | |
579 | (let* ((coding (car (cdr tail))) | |
580 | (aliases (coding-system-get coding 'alias-coding-systems))) | |
581 | (if (or | |
582 | ;; CODING is an eol variant if not in ALIASES. | |
583 | (not (memq coding aliases)) | |
584 | ;; CODING is an alias if it is not car of ALIASES. | |
585 | (and base-only (not (eq coding (car aliases))))) | |
586 | (setcdr tail (cdr (cdr tail))) | |
587 | (setq tail (cdr tail))))) | |
588 | codings)) | |
589 | ||
c11a8f77 KH |
590 | (defun register-char-codings (coding-system safe-chars) |
591 | (let ((general (char-table-extra-slot char-coding-system-table 0))) | |
592 | (if (eq safe-chars t) | |
593 | (or (memq coding-system general) | |
594 | (set-char-table-extra-slot char-coding-system-table 0 | |
595 | (cons coding-system general))) | |
596 | (map-char-table | |
597 | (function | |
598 | (lambda (key val) | |
599 | (if (and (>= key 128) val) | |
600 | (let ((codings (aref char-coding-system-table key))) | |
601 | (or (memq coding-system codings) | |
602 | (aset char-coding-system-table key | |
603 | (cons coding-system codings))))))) | |
604 | safe-chars)))) | |
605 | ||
606 | ||
6e9722b0 KH |
607 | ;; Make subsidiary coding systems (eol-type variants) of CODING-SYSTEM. |
608 | (defun make-subsidiary-coding-system (coding-system) | |
0269ddfb KH |
609 | (let ((coding-spec (coding-system-spec coding-system)) |
610 | (subsidiaries (vector (intern (format "%s-unix" coding-system)) | |
8057896b KH |
611 | (intern (format "%s-dos" coding-system)) |
612 | (intern (format "%s-mac" coding-system)))) | |
0269ddfb KH |
613 | (i 0) |
614 | temp) | |
8057896b | 615 | (while (< i 3) |
0269ddfb | 616 | (put (aref subsidiaries i) 'coding-system coding-spec) |
8057896b | 617 | (put (aref subsidiaries i) 'eol-type i) |
857ea15c | 618 | (add-to-coding-system-list (aref subsidiaries i)) |
0269ddfb KH |
619 | (setq coding-system-alist |
620 | (cons (list (symbol-name (aref subsidiaries i))) | |
621 | coding-system-alist)) | |
8057896b KH |
622 | (setq i (1+ i))) |
623 | subsidiaries)) | |
4ed46869 | 624 | |
50c29104 KH |
625 | (defun transform-make-coding-system-args (name type &optional doc-string props) |
626 | "For internal use only. | |
627 | Transform XEmacs style args for `make-coding-system' to Emacs style. | |
628 | Value is a list of transformed arguments." | |
629 | (let ((mnemonic (string-to-char (or (plist-get props 'mnemonic) "?"))) | |
630 | (eol-type (plist-get props 'eol-type)) | |
631 | properties tmp) | |
632 | (cond | |
633 | ((eq eol-type 'lf) (setq eol-type 'unix)) | |
634 | ((eq eol-type 'crlf) (setq eol-type 'dos)) | |
635 | ((eq eol-type 'cr) (setq eol-type 'mac))) | |
636 | (if (setq tmp (plist-get props 'post-read-conversion)) | |
637 | (setq properties (plist-put properties 'post-read-conversion tmp))) | |
638 | (if (setq tmp (plist-get props 'pre-write-conversion)) | |
639 | (setq properties (plist-put properties 'pre-write-conversion tmp))) | |
640 | (cond | |
641 | ((eq type 'ccl) | |
642 | `(,name 4 | |
643 | ,mnemonic | |
644 | ,doc-string | |
645 | (,(plist-get props 'decode) . ,(plist-get props 'encode)) | |
646 | ,properties | |
647 | ,eol-type)) | |
648 | (t | |
649 | (error "Unsupported XEmacs style arguments for make-coding-style: %S" | |
650 | `(,name ,type ,doc-string ,props)))))) | |
651 | ||
8057896b | 652 | (defun make-coding-system (coding-system type mnemonic doc-string |
1b46a680 KH |
653 | &optional |
654 | flags | |
655 | properties | |
656 | eol-type) | |
3bb1accb | 657 | "Define a new coding system CODING-SYSTEM (symbol). |
a6acd8a2 | 658 | Remaining arguments are TYPE, MNEMONIC, DOC-STRING, FLAGS (optional), |
d9e3229d | 659 | and PROPERTIES (optional) which construct a coding-spec of CODING-SYSTEM |
a6acd8a2 | 660 | in the following format: |
0269ddfb | 661 | [TYPE MNEMONIC DOC-STRING PLIST FLAGS] |
3bb1accb KH |
662 | |
663 | TYPE is an integer value indicating the type of the coding system as follows: | |
4ed46869 KH |
664 | 0: Emacs internal format, |
665 | 1: Shift-JIS (or MS-Kanji) used mainly on Japanese PC, | |
666 | 2: ISO-2022 including many variants, | |
667 | 3: Big5 used mainly on Chinese PC, | |
cd9c3177 KH |
668 | 4: private, CCL programs provide encoding/decoding algorithm, |
669 | 5: Raw-text, which means that text contains random 8-bit codes. | |
0269ddfb | 670 | |
3bb1accb | 671 | MNEMONIC is a character to be displayed on mode line for the coding system. |
0269ddfb | 672 | |
3bb1accb | 673 | DOC-STRING is a documentation string for the coding system. |
0269ddfb | 674 | |
3bb1accb | 675 | FLAGS specifies more detailed information of the coding system as follows: |
d6d6d592 | 676 | |
3bb1accb | 677 | If TYPE is 2 (ISO-2022), FLAGS is a list of these elements: |
4ed46869 KH |
678 | CHARSET0, CHARSET1, CHARSET2, CHARSET3, SHORT-FORM, |
679 | ASCII-EOL, ASCII-CNTL, SEVEN, LOCKING-SHIFT, SINGLE-SHIFT, | |
d6d6d592 | 680 | USE-ROMAN, USE-OLDJIS, NO-ISO6429, INIT-BOL, DESIGNATION-BOL, |
850101ed | 681 | SAFE, ACCEPT-LATIN-EXTRA-CODE. |
4ed46869 KH |
682 | CHARSETn are character sets initially designated to Gn graphic registers. |
683 | If CHARSETn is nil, Gn is never used. | |
684 | If CHARSETn is t, Gn can be used but nothing designated initially. | |
685 | If CHARSETn is a list of character sets, those character sets are | |
686 | designated to Gn on output, but nothing designated to Gn initially. | |
421e3b4e | 687 | But, character set `ascii' can be designated only to G0. |
4ed46869 KH |
688 | SHORT-FORM non-nil means use short designation sequence on output. |
689 | ASCII-EOL non-nil means designate ASCII to g0 at end of line on output. | |
690 | ASCII-CNTL non-nil means designate ASCII to g0 before control codes and | |
691 | SPACE on output. | |
692 | SEVEN non-nil means use 7-bit code only on output. | |
693 | LOCKING-SHIFT non-nil means use locking-shift. | |
694 | SINGLE-SHIFT non-nil means use single-shift. | |
695 | USE-ROMAN non-nil means designate JIS0201-1976-Roman instead of ASCII. | |
696 | USE-OLDJIS non-nil means designate JIS0208-1976 instead of JIS0208-1983. | |
697 | NO-ISO6429 non-nil means not use ISO6429's direction specification. | |
69eba008 KH |
698 | INIT-BOL non-nil means any designation state is assumed to be reset |
699 | to initial at each beginning of line on output. | |
700 | DESIGNATION-BOL non-nil means designation sequences should be placed | |
701 | at beginning of line on output. | |
a6acd8a2 | 702 | SAFE non-nil means convert unsafe characters to `?' on output. |
c11a8f77 KH |
703 | Characters not specified in the property `safe-charsets' nor |
704 | `safe-chars' are unsafe. | |
850101ed RS |
705 | ACCEPT-LATIN-EXTRA-CODE non-nil means code-detection routine accepts |
706 | a code specified in `latin-extra-code-table' (which see) as a valid | |
707 | code of the coding system. | |
d6d6d592 | 708 | |
3bb1accb KH |
709 | If TYPE is 4 (private), FLAGS should be a cons of CCL programs, for |
710 | decoding and encoding. CCL programs should be specified by their | |
711 | symbols. | |
d9e3229d | 712 | |
a2852e45 KH |
713 | PROPERTIES is an alist of properties vs the corresponding values. The |
714 | following properties are recognized: | |
715 | ||
716 | o post-read-conversion | |
717 | ||
718 | The value is a function to call after some text is inserted and | |
719 | decoded by the coding system itself and before any functions in | |
720 | `after-insert-functions' are called. The arguments to this | |
721 | function is the same as those of a function in | |
722 | `after-insert-functions', i.e. LENGTH of a text while putting point | |
723 | at the head of the text to be decoded | |
724 | ||
725 | o pre-write-conversion | |
726 | ||
727 | The value is a function to call after all functions in | |
728 | `write-region-annotate-functions' and `buffer-file-format' are | |
729 | called, and before the text is encoded by the coding system itself. | |
730 | The arguments to this function is the same as those of a function | |
731 | in `write-region-annotate-functions', i.e. FROM and TO specifying | |
732 | region of a text. | |
733 | ||
734 | o translation-table-for-decode | |
735 | ||
736 | The value is a translation table to be applied on decoding. See | |
737 | the function `make-translation-table' for the format of translation | |
738 | table. | |
739 | ||
740 | o translation-table-for-encode | |
741 | ||
742 | The value is a translation table to be applied on encoding. | |
743 | ||
744 | o safe-chars | |
745 | ||
746 | The value is a char table. If a character has non-nil value in it, | |
747 | the character is safely supported by the coding system. This | |
748 | overrides the specification of safe-charsets. | |
749 | ||
750 | o safe-charsets | |
751 | ||
752 | The value is a list of charsets safely supported by the coding | |
753 | system. The value t means that all charsets Emacs handles are | |
754 | supported. Even if some charset is not in this list, it doesn't | |
755 | mean that the charset can't be encoded in the coding system, | |
756 | instead, it just means that some other receiver of a text encoded | |
757 | in the coding system won't be able to handle that charset. | |
758 | ||
759 | o mime-charset | |
760 | ||
761 | The value is a symbol of which name is `MIME-charset' parameter of | |
762 | the coding system. | |
763 | ||
764 | o valid-codes (meaningful only for a coding system based on CCL) | |
765 | ||
766 | The value is a list to indicate valid byte ranges of the encoded | |
767 | file. Each element of the list is an integer or a cons of integer. | |
768 | In the former case, the integer value is a valid byte code. In the | |
769 | latter case, the integers specifies the range of valid byte codes. | |
770 | ||
d9e3229d KH |
771 | These properties are set in PLIST, a property list. This function |
772 | also sets properties `coding-category' and `alias-coding-systems' | |
773 | automatically. | |
4ed46869 | 774 | |
1b46a680 KH |
775 | EOL-TYPE specifies the EOL type of the coding-system in one of the |
776 | following formats: | |
777 | ||
778 | o symbol (unix, dos, or mac) | |
779 | ||
780 | The symbol `unix' means Unix-like EOL (LF), `dos' means | |
781 | DOS-like EOL (CRLF), and `mac' means MAC-like EOL (CR). | |
782 | ||
783 | o number (0, 1, or 2) | |
784 | ||
785 | The number 0, 1, and 2 mean UNIX, DOS, and MAC-like EOL | |
786 | respectively. | |
787 | ||
788 | o vector of coding-systems of length 3 | |
789 | ||
790 | The EOL type is detected automatically for the coding system. | |
791 | And, according to the detected EOL type, one of the coding | |
792 | systems in the vector is selected. Elements of the vector | |
4d3a9228 | 793 | corresponds to Unix-like EOL, DOS-like EOL, and Mac-like EOL |
1b46a680 KH |
794 | in this order. |
795 | ||
3bb1accb KH |
796 | Kludgy features for backward compatibility: |
797 | ||
798 | 1. If TYPE is 4 and car or cdr of FLAGS is a vector, the vector is | |
799 | treated as a compiled CCL code. | |
800 | ||
801 | 2. If PROPERTIES is just a list of character sets, the list is set as | |
802 | a value of `safe-charsets' in PLIST." | |
50c29104 KH |
803 | |
804 | ;; For compatiblity with XEmacs, we check the type of TYPE. If it | |
c3d0ee51 EZ |
805 | ;; is a symbol, perhaps, this function is called with XEmacs-style |
806 | ;; arguments. Here, try to transform that kind of arguments to | |
50c29104 KH |
807 | ;; Emacs style. |
808 | (if (symbolp type) | |
809 | (let ((args (transform-make-coding-system-args coding-system type | |
810 | mnemonic doc-string))) | |
811 | (setq coding-system (car args) | |
1053cc93 | 812 | type (nth 1 args) |
50c29104 KH |
813 | mnemonic (nth 2 args) |
814 | doc-string (nth 3 args) | |
815 | flags (nth 4 args) | |
816 | properties (nth 5 args) | |
817 | eol-type (nth 6 args)))) | |
818 | ||
0269ddfb | 819 | ;; Set a value of `coding-system' property. |
6e9722b0 | 820 | (let ((coding-spec (make-vector 5 nil)) |
d9e3229d KH |
821 | (no-initial-designation t) |
822 | (no-alternative-designation t) | |
e6cddb1a | 823 | (accept-latin-extra-code nil) |
6e9722b0 | 824 | coding-category) |
cd9c3177 | 825 | (if (or (not (integerp type)) (< type 0) (> type 5)) |
0269ddfb | 826 | (error "TYPE argument must be 0..5")) |
8057896b | 827 | (if (or (not (integerp mnemonic)) (<= mnemonic ? ) (> mnemonic 127)) |
e8dd0160 | 828 | (error "MNEMONIC argument must be an ASCII printable character.")) |
0269ddfb KH |
829 | (aset coding-spec coding-spec-type-idx type) |
830 | (aset coding-spec coding-spec-mnemonic-idx mnemonic) | |
831 | (aset coding-spec coding-spec-doc-string-idx | |
e127a722 | 832 | (purecopy (if (stringp doc-string) doc-string ""))) |
6e9722b0 KH |
833 | (cond ((= type 0) |
834 | (setq coding-category 'coding-category-emacs-mule)) | |
835 | ((= type 1) | |
836 | (setq coding-category 'coding-category-sjis)) | |
837 | ((= type 2) ; ISO2022 | |
4ed46869 | 838 | (let ((i 0) |
6e9722b0 | 839 | (vec (make-vector 32 nil)) |
05134257 KH |
840 | (g1-designation nil) |
841 | (fl flags)) | |
4ed46869 | 842 | (while (< i 4) |
05134257 | 843 | (let ((charset (car fl))) |
6e9722b0 KH |
844 | (if (and no-initial-designation |
845 | (> i 0) | |
846 | (or (charsetp charset) | |
847 | (and (consp charset) | |
848 | (charsetp (car charset))))) | |
849 | (setq no-initial-designation nil)) | |
850 | (if (charsetp charset) | |
851 | (if (= i 1) (setq g1-designation charset)) | |
852 | (if (consp charset) | |
853 | (let ((tail charset) | |
854 | elt) | |
855 | (while tail | |
856 | (setq elt (car tail)) | |
d9e3229d KH |
857 | (if (eq elt t) |
858 | (setq no-alternative-designation nil) | |
859 | (if (and elt (not (charsetp elt))) | |
860 | (error "Invalid charset: %s" elt))) | |
6e9722b0 KH |
861 | (setq tail (cdr tail))) |
862 | (setq g1-designation (car charset))) | |
d9e3229d KH |
863 | (if charset |
864 | (if (eq charset t) | |
865 | (setq no-alternative-designation nil) | |
866 | (error "Invalid charset: %s" charset))))) | |
4ed46869 | 867 | (aset vec i charset)) |
05134257 KH |
868 | (setq fl (cdr fl) i (1+ i))) |
869 | (while (and (< i 32) fl) | |
870 | (aset vec i (car fl)) | |
e6cddb1a KH |
871 | (if (and (= i 16) ; ACCEPT-LATIN-EXTRA-CODE |
872 | (car fl)) | |
873 | (setq accept-latin-extra-code t)) | |
05134257 | 874 | (setq fl (cdr fl) i (1+ i))) |
6e9722b0 | 875 | (aset coding-spec 4 vec) |
6e9722b0 KH |
876 | (setq coding-category |
877 | (if (aref vec 8) ; Use locking-shift. | |
dc64cd19 KH |
878 | (or (and (aref vec 7) 'coding-category-iso-7-else) |
879 | 'coding-category-iso-8-else) | |
6e9722b0 KH |
880 | (if (aref vec 7) ; 7-bit only. |
881 | (if (aref vec 9) ; Use single-shift. | |
dc64cd19 | 882 | 'coding-category-iso-7-else |
d9e3229d KH |
883 | (if no-alternative-designation |
884 | 'coding-category-iso-7-tight | |
885 | 'coding-category-iso-7)) | |
3ad911d8 KH |
886 | (if (or no-initial-designation |
887 | (not no-alternative-designation)) | |
dc64cd19 | 888 | 'coding-category-iso-8-else |
6e9722b0 KH |
889 | (if (and (charsetp g1-designation) |
890 | (= (charset-dimension g1-designation) 2)) | |
891 | 'coding-category-iso-8-2 | |
892 | 'coding-category-iso-8-1))))))) | |
893 | ((= type 3) | |
894 | (setq coding-category 'coding-category-big5)) | |
895 | ((= type 4) ; private | |
c76b5c99 | 896 | (setq coding-category 'coding-category-ccl) |
3bb1accb KH |
897 | (if (not (consp flags)) |
898 | (error "Invalid FLAGS argument for TYPE 4 (CCL)") | |
899 | (let ((decoder (check-ccl-program | |
900 | (car flags) | |
901 | (intern (format "%s-decoder" coding-system)))) | |
902 | (encoder (check-ccl-program | |
903 | (cdr flags) | |
904 | (intern (format "%s-encoder" coding-system))))) | |
905 | (if (and decoder encoder) | |
906 | (aset coding-spec 4 (cons decoder encoder)) | |
907 | (error "Invalid FLAGS argument for TYPE 4 (CCL)"))))) | |
cd9c3177 KH |
908 | (t ; i.e. (= type 5) |
909 | (setq coding-category 'coding-category-raw-text))) | |
0269ddfb KH |
910 | |
911 | (let ((plist (list 'coding-category coding-category | |
d9e3229d | 912 | 'alias-coding-systems (list coding-system)))) |
0269ddfb | 913 | (if no-initial-designation |
d9e3229d KH |
914 | (plist-put plist 'no-initial-designation t)) |
915 | (if (and properties | |
916 | (or (eq properties t) | |
917 | (not (consp (car properties))))) | |
918 | ;; In the old version, the arg PROPERTIES is a list to be | |
919 | ;; set in PLIST as a value of property `safe-charsets'. | |
c11a8f77 KH |
920 | (setq properties (list (cons 'safe-charsets properties)))) |
921 | ;; In the current version PROPERTIES is a property list. | |
922 | ;; Reflect it into PLIST one by one while handling safe-chars | |
923 | ;; specially. | |
924 | (let ((safe-charsets (cdr (assq 'safe-charsets properties))) | |
925 | (safe-chars (cdr (assq 'safe-chars properties))) | |
926 | (l properties) | |
927 | prop val) | |
928 | ;; If only safe-charsets is specified, make a char-table from | |
929 | ;; it, and store that char-table as the value of `safe-chars'. | |
930 | (if (and (not safe-chars) safe-charsets) | |
931 | (let (charset) | |
932 | (if (eq safe-charsets t) | |
933 | (setq safe-chars t) | |
934 | (setq safe-chars (make-char-table 'safe-chars)) | |
935 | (while safe-charsets | |
936 | (setq charset (car safe-charsets) | |
937 | safe-charsets (cdr safe-charsets)) | |
938 | (cond ((eq charset 'ascii)) ; just ignore | |
939 | ((eq charset 'eight-bit-control) | |
940 | (let ((i 128)) | |
941 | (while (< i 160) | |
942 | (aset safe-chars i t) | |
943 | (setq i (1+ i))))) | |
944 | ((eq charset 'eight-bit-graphic) | |
945 | (let ((i 160)) | |
946 | (while (< i 256) | |
947 | (aset safe-chars i t) | |
948 | (setq i (1+ i))))) | |
949 | (t | |
e6cddb1a KH |
950 | (aset safe-chars (make-char charset) t)))) |
951 | (if accept-latin-extra-code | |
952 | (let ((i 128)) | |
953 | (while (< i 160) | |
954 | (if (aref latin-extra-code-table i) | |
955 | (aset safe-chars i t)) | |
956 | (setq i (1+ i)))))) | |
c11a8f77 KH |
957 | (setq l (cons (cons 'safe-chars safe-chars) l)))) |
958 | (while l | |
959 | (setq prop (car (car l)) val (cdr (car l)) l (cdr l)) | |
960 | (if (eq prop 'safe-chars) | |
961 | (progn | |
cc57cc54 KH |
962 | (if (and (symbolp val) |
963 | (get val 'translation-table)) | |
964 | (setq safe-chars (get val 'translation-table))) | |
965 | (register-char-codings coding-system safe-chars) | |
966 | (setq val safe-chars))) | |
c11a8f77 | 967 | (plist-put plist prop val))) |
1b46a680 KH |
968 | ;; The property `coding-category' may have been set differently |
969 | ;; through PROPERTIES. | |
970 | (setq coding-category (plist-get plist 'coding-category)) | |
0269ddfb | 971 | (aset coding-spec coding-spec-plist-idx plist)) |
6e9722b0 | 972 | (put coding-system 'coding-system coding-spec) |
6e9722b0 KH |
973 | (put coding-category 'coding-systems |
974 | (cons coding-system (get coding-category 'coding-systems)))) | |
4ed46869 | 975 | |
1b46a680 | 976 | ;; Next, set a value of `eol-type' property. |
af873cd1 | 977 | (if (not eol-type) |
1b46a680 KH |
978 | ;; If EOL-TYPE is nil, set a vector of subsidiary coding |
979 | ;; systems, each corresponds to a coding system for the detected | |
980 | ;; EOL format. | |
981 | (setq eol-type (make-subsidiary-coding-system coding-system))) | |
982 | (setq eol-type | |
983 | (cond ((or (eq eol-type 'unix) (null eol-type)) | |
984 | 0) | |
985 | ((eq eol-type 'dos) | |
986 | 1) | |
987 | ((eq eol-type 'mac) | |
988 | 2) | |
989 | ((or (and (vectorp eol-type) | |
990 | (= (length eol-type) 3)) | |
991 | (and (numberp eol-type) | |
992 | (and (>= eol-type 0) | |
993 | (<= eol-type 2)))) | |
994 | eol-type) | |
995 | (t | |
996 | (error "Invalid EOL-TYPE spec:%S" eol-type)))) | |
997 | (put coding-system 'eol-type eol-type) | |
0269ddfb KH |
998 | |
999 | ;; At last, register CODING-SYSTEM in `coding-system-list' and | |
1000 | ;; `coding-system-alist'. | |
857ea15c | 1001 | (add-to-coding-system-list coding-system) |
0269ddfb | 1002 | (setq coding-system-alist (cons (list (symbol-name coding-system)) |
d9e3229d | 1003 | coding-system-alist)) |
05134257 KH |
1004 | |
1005 | ;; For a coding system of cateogory iso-8-1 and iso-8-2, create | |
1006 | ;; XXX-with-esc variants. | |
1007 | (let ((coding-category (coding-system-category coding-system))) | |
1008 | (if (or (eq coding-category 'coding-category-iso-8-1) | |
1009 | (eq coding-category 'coding-category-iso-8-2)) | |
1010 | (let ((esc (intern (concat (symbol-name coding-system) "-with-esc"))) | |
c11a8f77 KH |
1011 | (doc (format "Same as %s but can handle any charsets by ISO's escape sequences." coding-system)) |
1012 | (safe-charsets (assq 'safe-charsets properties)) | |
1013 | (mime-charset (assq 'mime-charset properties))) | |
1014 | (if safe-charsets | |
1015 | (setcdr safe-charsets t) | |
1016 | (setq properties (cons (cons 'safe-charsets t) properties))) | |
1017 | (if mime-charset | |
1018 | (setcdr mime-charset nil)) | |
05134257 KH |
1019 | (make-coding-system esc type mnemonic doc |
1020 | (if (listp (car flags)) | |
1021 | (cons (append (car flags) '(t)) (cdr flags)) | |
1022 | (cons (list (car flags) t) (cdr flags))) | |
c11a8f77 | 1023 | properties)))) |
05134257 | 1024 | |
d9e3229d | 1025 | coding-system) |
8057896b | 1026 | |
a42763dc | 1027 | (defun define-coding-system-alias (alias coding-system) |
358d28fb | 1028 | "Define ALIAS as an alias for coding system CODING-SYSTEM." |
0269ddfb KH |
1029 | (put alias 'coding-system (coding-system-spec coding-system)) |
1030 | (nconc (coding-system-get alias 'alias-coding-systems) (list alias)) | |
857ea15c | 1031 | (add-to-coding-system-list alias) |
0269ddfb KH |
1032 | (setq coding-system-alist (cons (list (symbol-name alias)) |
1033 | coding-system-alist)) | |
1034 | (let ((eol-type (coding-system-eol-type coding-system))) | |
1035 | (if (vectorp eol-type) | |
1036 | (put alias 'eol-type (make-subsidiary-coding-system alias)) | |
1037 | (put alias 'eol-type eol-type)))) | |
4ed46869 KH |
1038 | |
1039 | (defun set-buffer-file-coding-system (coding-system &optional force) | |
358d28fb RS |
1040 | "Set the file coding-system of the current buffer to CODING-SYSTEM. |
1041 | This means that when you save the buffer, it will be converted | |
1042 | according to CODING-SYSTEM. For a list of possible values of CODING-SYSTEM, | |
1043 | use \\[list-coding-systems]. | |
1044 | ||
1045 | If the buffer's previous file coding-system value specifies end-of-line | |
1046 | conversion, and CODING-SYSTEM does not specify one, CODING-SYSTEM is | |
1047 | merged with the already-specified end-of-line conversion. | |
b839fdcc KH |
1048 | |
1049 | If the buffer's previous file coding-system value specifies text | |
1050 | conversion, and CODING-SYSTEM does not specify one, CODING-SYSTEM is | |
1051 | merged with the already-specified text conversion. | |
1052 | ||
1053 | However, if the optional prefix argument FORCE is non-nil, then | |
1054 | CODING-SYSTEM is used exactly as specified. | |
aeef8f07 KH |
1055 | |
1056 | This marks the buffer modified so that the succeeding \\[save-buffer] | |
1057 | surely saves the buffer with CODING-SYSTEM. From a program, if you | |
1058 | don't want to mark the buffer modified, just set the variable | |
1059 | `buffer-file-coding-system' directly." | |
d9e3229d | 1060 | (interactive "zCoding system for visited file (default, nil): \nP") |
4ed46869 | 1061 | (check-coding-system coding-system) |
36d455c4 | 1062 | (if (and coding-system buffer-file-coding-system (null force)) |
8dd735c1 KH |
1063 | (let ((base (coding-system-base buffer-file-coding-system)) |
1064 | (eol (coding-system-eol-type buffer-file-coding-system))) | |
1065 | ;; If CODING-SYSTEM doesn't specify text conversion, merge | |
1066 | ;; with that of buffer-file-coding-system. | |
1067 | (if (eq (coding-system-base coding-system) 'undecided) | |
1068 | (setq coding-system (coding-system-change-text-conversion | |
1069 | coding-system base))) | |
1070 | ;; If CODING-SYSTEM doesn't specify eol conversion, merge with | |
1071 | ;; that of buffer-file-coding-system. | |
1072 | (if (and (vectorp (coding-system-eol-type coding-system)) | |
1073 | (numberp eol) (>= eol 0) (<= eol 2)) | |
1074 | (setq coding-system (coding-system-change-eol-conversion | |
1075 | coding-system eol))))) | |
4ed46869 KH |
1076 | (setq buffer-file-coding-system coding-system) |
1077 | (set-buffer-modified-p t) | |
1078 | (force-mode-line-update)) | |
1079 | ||
358d28fb RS |
1080 | (defvar default-terminal-coding-system nil |
1081 | "Default value for the terminal coding system. | |
1082 | This is normally set according to the selected language environment. | |
1083 | See also the command `set-terminal-coding-system'.") | |
1084 | ||
df100398 KH |
1085 | (defun set-terminal-coding-system (coding-system) |
1086 | "Set coding system of your terminal to CODING-SYSTEM. | |
358d28fb RS |
1087 | All text output to the terminal will be encoded |
1088 | with the specified coding system. | |
1089 | For a list of possible values of CODING-SYSTEM, use \\[list-coding-systems]. | |
1090 | The default is determined by the selected language environment | |
1091 | or by the previous use of this command." | |
1092 | (interactive | |
2e02a76f RS |
1093 | (list (let ((default (if (and (not (terminal-coding-system)) |
1094 | default-terminal-coding-system) | |
1095 | default-terminal-coding-system))) | |
1096 | (read-coding-system | |
1097 | (format "Coding system for terminal display (default, %s): " | |
1098 | default) | |
1099 | default)))) | |
358d28fb RS |
1100 | (if (and (not coding-system) |
1101 | (not (terminal-coding-system))) | |
1102 | (setq coding-system default-terminal-coding-system)) | |
1103 | (if coding-system | |
1104 | (setq default-terminal-coding-system coding-system)) | |
df100398 KH |
1105 | (set-terminal-coding-system-internal coding-system) |
1106 | (redraw-frame (selected-frame))) | |
1107 | ||
358d28fb RS |
1108 | (defvar default-keyboard-coding-system nil |
1109 | "Default value of the keyboard coding system. | |
1110 | This is normally set according to the selected language environment. | |
1111 | See also the command `set-keyboard-coding-system'.") | |
1112 | ||
df100398 | 1113 | (defun set-keyboard-coding-system (coding-system) |
358d28fb RS |
1114 | "Set coding system for keyboard input to CODING-SYSTEM. |
1115 | In addition, this command enables Encoded-kbd minor mode. | |
6d34f495 DL |
1116 | \(If CODING-SYSTEM is nil, Encoded-kbd mode is turned off -- see |
1117 | `encoded-kbd-mode'.) | |
358d28fb RS |
1118 | For a list of possible values of CODING-SYSTEM, use \\[list-coding-systems]. |
1119 | The default is determined by the selected language environment | |
1120 | or by the previous use of this command." | |
1121 | (interactive | |
2e02a76f RS |
1122 | (list (let ((default (if (and (not (keyboard-coding-system)) |
1123 | default-keyboard-coding-system) | |
1124 | default-keyboard-coding-system))) | |
1125 | (read-coding-system | |
1126 | (format "Coding system for keyboard input (default, %s): " | |
1127 | default) | |
1128 | default)))) | |
358d28fb RS |
1129 | (if (and (not coding-system) |
1130 | (not (keyboard-coding-system))) | |
1131 | (setq coding-system default-keyboard-coding-system)) | |
1132 | (if coding-system | |
1133 | (setq default-keyboard-coding-system coding-system)) | |
df100398 KH |
1134 | (set-keyboard-coding-system-internal coding-system) |
1135 | (encoded-kbd-mode (if coding-system 1 0))) | |
1136 | ||
6d34f495 DL |
1137 | (defcustom keyboard-coding-system nil |
1138 | "Specify coding system for keyboard input. | |
1139 | If you set this on a terminal which can't distinguish Meta keys from | |
1140 | 8-bit characters, you will have to use ESC to type Meta characters. | |
1141 | See Info node `Specify Coding' and Info node `Single-Byte Character Support'. | |
1142 | ||
1143 | Setting this variable directly does not take effect; | |
1144 | use either M-x customize or \\[set-keyboard-coding-system]." | |
1145 | :type '(coding-system :tag "Coding system") | |
1146 | :link '(info-link "(emacs)Specify Coding") | |
1147 | :link '(info-link "(emacs)Single-Byte Character Support") | |
1148 | :set (lambda (symbol value) | |
1149 | ;; Don't load encoded-kbd-mode unnecessarily. | |
1150 | (if (or value (boundp 'encoded-kbd-mode)) | |
1151 | (set-keyboard-coding-system value) | |
1152 | (set-default 'keyboard-coding-system nil))) ; must initialize | |
1153 | :version "21.1" | |
1154 | :group 'keyboard | |
1155 | :group 'mule) | |
1156 | ||
df100398 | 1157 | (defun set-buffer-process-coding-system (decoding encoding) |
358d28fb | 1158 | "Set coding systems for the process associated with the current buffer. |
df100398 | 1159 | DECODING is the coding system to be used to decode input from the process, |
358d28fb RS |
1160 | ENCODING is the coding system to be used to encode output to the process. |
1161 | ||
1162 | For a list of possible values of CODING-SYSTEM, use \\[list-coding-systems]." | |
4ed46869 | 1163 | (interactive |
83911021 | 1164 | "zCoding-system for output from the process: \nzCoding-system for input to the process: ") |
4ed46869 KH |
1165 | (let ((proc (get-buffer-process (current-buffer)))) |
1166 | (if (null proc) | |
1167 | (error "no process") | |
df100398 KH |
1168 | (check-coding-system decoding) |
1169 | (check-coding-system encoding) | |
1170 | (set-process-coding-system proc decoding encoding))) | |
4ed46869 KH |
1171 | (force-mode-line-update)) |
1172 | ||
d0b99881 RS |
1173 | (defalias 'set-clipboard-coding-system 'set-selection-coding-system) |
1174 | ||
14915c37 | 1175 | (defun set-selection-coding-system (coding-system) |
b25eef20 KH |
1176 | "Make CODING-SYSTEM used for communicating with other X clients . |
1177 | When sending or receiving text via cut_buffer, selection, and clipboard, | |
1178 | the text is encoded or decoded by CODING-SYSTEM." | |
a03b3ce1 | 1179 | (interactive "zCoding system for X selection: ") |
b25eef20 | 1180 | (check-coding-system coding-system) |
14915c37 | 1181 | (setq selection-coding-system coding-system)) |
b25eef20 | 1182 | |
e8dd0160 | 1183 | ;; Coding system lastly specified by the command |
a03b3ce1 KH |
1184 | ;; set-next-selection-coding-system. |
1185 | (defvar last-next-selection-coding-system nil) | |
1186 | ||
1187 | (defun set-next-selection-coding-system (coding-system) | |
1188 | "Make CODING-SYSTEM used for the next communication with other X clients. | |
1189 | This setting is effective for the next communication only." | |
1190 | (interactive | |
1191 | (list (read-coding-system | |
1192 | (if last-next-selection-coding-system | |
1193 | (format "Coding system for the next X selection (default, %S): " | |
1194 | last-next-selection-coding-system) | |
1195 | "Coding system for the next X selection: ") | |
1196 | last-next-selection-coding-system))) | |
1197 | (if coding-system | |
1198 | (setq last-next-selection-coding-system coding-system) | |
1199 | (setq coding-system last-next-selection-coding-system)) | |
1200 | (check-coding-system coding-system) | |
1201 | ||
1202 | (setq next-selection-coding-system coding-system)) | |
1203 | ||
4ed46869 | 1204 | (defun set-coding-priority (arg) |
d9e3229d KH |
1205 | "Set priority of coding categories according to LIST. |
1206 | LIST is a list of coding categories ordered by priority." | |
1207 | (let ((l arg) | |
1208 | (current-list (copy-sequence coding-category-list))) | |
e8dd0160 | 1209 | ;; Check the validity of ARG while deleting coding categories in |
d9e3229d KH |
1210 | ;; ARG from CURRENT-LIST. We assume that CODING-CATEGORY-LIST |
1211 | ;; contains all coding categories. | |
1212 | (while l | |
1213 | (if (or (null (get (car l) 'coding-category-index)) | |
1214 | (null (memq (car l) current-list))) | |
1215 | (error "Invalid or duplicated element in argument: %s" arg)) | |
1216 | (setq current-list (delq (car l) current-list)) | |
1217 | (setq l (cdr l))) | |
4ed46869 | 1218 | ;; Update `coding-category-list' and return it. |
2feaf204 KH |
1219 | (setq coding-category-list (append arg current-list)) |
1220 | (set-coding-priority-internal))) | |
4ed46869 KH |
1221 | |
1222 | ;;; FILE I/O | |
1223 | ||
e76938e7 | 1224 | (defcustom auto-coding-alist |
0735296c DL |
1225 | '(("\\.\\(arc\\|zip\\|lzh\\|zoo\\|jar\\|tar\\|tgz\\)\\'" . no-conversion) |
1226 | ("\\.\\(ARC\\|ZIP\\|LZH\\|ZOO\\|JAR\\|TAR\\|TGZ\\)\\'" . no-conversion)) | |
835f49b8 KH |
1227 | "Alist of filename patterns vs corresponding coding systems. |
1228 | Each element looks like (REGEXP . CODING-SYSTEM). | |
558b0c86 | 1229 | A file whose name matches REGEXP is decoded by CODING-SYSTEM on reading. |
835f49b8 | 1230 | |
7fed493a RS |
1231 | The settings in this alist take priority over `coding:' tags |
1232 | in the file (see the function `set-auto-coding') | |
e76938e7 DL |
1233 | and the contents of `file-coding-system-alist'." |
1234 | :group 'files | |
1235 | :group 'mule | |
1236 | :type '(repeat (cons (regexp :tag "File name regexp") | |
1237 | (symbol :tag "Coding system")))) | |
835f49b8 | 1238 | |
1c4cc63a KH |
1239 | (defvar set-auto-coding-for-load nil |
1240 | "Non-nil means look for `load-coding' property instead of `coding'. | |
1241 | This is used for loading and byte-compiling Emacs Lisp files.") | |
1242 | ||
8a592131 RS |
1243 | (defun auto-coding-alist-lookup (filename) |
1244 | "Return the coding system specified by `auto-coding-alist' for FILENAME." | |
1245 | (let ((alist auto-coding-alist) | |
ca128d75 | 1246 | (case-fold-search (memq system-type '(vax-vms windows-nt ms-dos))) |
8a592131 RS |
1247 | coding-system) |
1248 | (while (and alist (not coding-system)) | |
1249 | (if (string-match (car (car alist)) filename) | |
1250 | (setq coding-system (cdr (car alist))) | |
1251 | (setq alist (cdr alist)))) | |
1252 | coding-system)) | |
1253 | ||
835f49b8 KH |
1254 | (defun set-auto-coding (filename size) |
1255 | "Return coding system for a file FILENAME of which SIZE bytes follow point. | |
1c4cc63a KH |
1256 | These bytes should include at least the first 1k of the file |
1257 | and the last 3k of the file, but the middle may be omitted. | |
63561304 | 1258 | |
835f49b8 KH |
1259 | It checks FILENAME against the variable `auto-coding-alist'. |
1260 | If FILENAME doesn't match any entries in the variable, | |
1261 | it checks for a `coding:' tag in the first one or two lines following | |
e8dd0160 | 1262 | point. If no `coding:' tag is found, it checks for local variables |
1c4cc63a | 1263 | list in the last 3K bytes out of the SIZE bytes. |
63561304 KH |
1264 | |
1265 | The return value is the specified coding system, | |
1266 | or nil if nothing specified. | |
87aba788 | 1267 | |
ba74e833 | 1268 | The variable `set-auto-coding-function' (which see) is set to this |
87aba788 | 1269 | function by default." |
8a592131 | 1270 | (let ((coding-system (auto-coding-alist-lookup filename))) |
835f49b8 KH |
1271 | |
1272 | (or coding-system | |
1273 | (let* ((case-fold-search t) | |
1274 | (head-start (point)) | |
1275 | (head-end (+ head-start (min size 1024))) | |
1276 | (tail-start (+ head-start (max (- size 3072) 0))) | |
1277 | (tail-end (+ head-start size)) | |
1278 | coding-system head-found tail-found pos) | |
1279 | ;; Try a short cut by searching for the string "coding:" | |
e8dd0160 | 1280 | ;; and for "unibyte:" at the head and tail of SIZE bytes. |
835f49b8 KH |
1281 | (setq head-found (or (search-forward "coding:" head-end t) |
1282 | (search-forward "unibyte:" head-end t))) | |
1283 | (if (and head-found (> head-found tail-start)) | |
1284 | ;; Head and tail are overlapped. | |
1285 | (setq tail-found head-found) | |
1286 | (goto-char tail-start) | |
1287 | (setq tail-found (or (search-forward "coding:" tail-end t) | |
1288 | (search-forward "unibyte:" tail-end t)))) | |
1289 | ||
1290 | ;; At first check the head. | |
1291 | (when head-found | |
1292 | (goto-char head-start) | |
1293 | (setq pos (re-search-forward "[\n\r]" head-end t)) | |
1294 | (if (and pos | |
1295 | (= (char-after head-start) ?#) | |
1296 | (= (char-after (1+ head-start)) ?!)) | |
1297 | ;; If the file begins with "#!" (exec interpreter magic), | |
1298 | ;; look for coding frobs in the first two lines. You cannot | |
1299 | ;; necessarily put them in the first line of such a file | |
1300 | ;; without screwing up the interpreter invocation. | |
1301 | (setq pos (search-forward "\n" head-end t))) | |
1302 | (if pos (setq head-end pos)) | |
1303 | (when (< head-found head-end) | |
1304 | (goto-char head-start) | |
1305 | (when (and set-auto-coding-for-load | |
1306 | (re-search-forward | |
1307 | "-\\*-\\(.*;\\)?[ \t]*unibyte:[ \t]*\\([^ ;]+\\)" | |
1308 | head-end t)) | |
1309 | (setq coding-system 'raw-text)) | |
1310 | (when (and (not coding-system) | |
1311 | (re-search-forward | |
1312 | "-\\*-\\(.*;\\)?[ \t]*coding:[ \t]*\\([^ ;]+\\)" | |
1313 | head-end t)) | |
1314 | (setq coding-system (intern (match-string 2))) | |
1315 | (or (coding-system-p coding-system) | |
1316 | (setq coding-system nil))))) | |
1317 | ||
1318 | ;; If no coding: tag in the head, check the tail. | |
1319 | (when (and tail-found (not coding-system)) | |
1320 | (goto-char tail-start) | |
1321 | (search-forward "\n\^L" nil t) | |
1322 | (if (re-search-forward | |
1323 | "^\\(.*\\)[ \t]*Local Variables:[ \t]*\\(.*\\)$" tail-end t) | |
1324 | ;; The prefix is what comes before "local variables:" in its | |
1325 | ;; line. The suffix is what comes after "local variables:" | |
1326 | ;; in its line. | |
1327 | (let* ((prefix (regexp-quote (match-string 1))) | |
1328 | (suffix (regexp-quote (match-string 2))) | |
d318fcf4 EZ |
1329 | (re-coding |
1330 | (concat | |
1331 | "^" prefix | |
1332 | "[ \t]*coding[ \t]*:[ \t]*\\([^ \t]+\\)[ \t]*" | |
1333 | suffix "$")) | |
1334 | (re-unibyte | |
1335 | (concat | |
1336 | "^" prefix | |
1337 | "[ \t]*unibyte[ \t]*:[ \t]*\\([^ \t]+\\)[ \t]*" | |
1338 | suffix "$")) | |
1339 | (re-end | |
1340 | (concat "^" prefix "[ \t]*end *:[ \t]*" suffix "$")) | |
835f49b8 KH |
1341 | (pos (point))) |
1342 | (re-search-forward re-end tail-end 'move) | |
1343 | (setq tail-end (point)) | |
1344 | (goto-char pos) | |
1345 | (when (and set-auto-coding-for-load | |
1346 | (re-search-forward re-unibyte tail-end t)) | |
1347 | (setq coding-system 'raw-text)) | |
1348 | (when (and (not coding-system) | |
1349 | (re-search-forward re-coding tail-end t)) | |
1350 | (setq coding-system (intern (match-string 1))) | |
1351 | (or (coding-system-p coding-system) | |
1352 | (setq coding-system nil)))))) | |
1353 | coding-system)))) | |
63561304 KH |
1354 | |
1355 | (setq set-auto-coding-function 'set-auto-coding) | |
87aba788 | 1356 | |
4ed46869 KH |
1357 | ;; Set buffer-file-coding-system of the current buffer after some text |
1358 | ;; is inserted. | |
1359 | (defun after-insert-file-set-buffer-file-coding-system (inserted) | |
1360 | (if last-coding-system-used | |
1361 | (let ((coding-system | |
1362 | (find-new-buffer-file-coding-system last-coding-system-used)) | |
1363 | (modified-p (buffer-modified-p))) | |
0269ddfb | 1364 | (when coding-system |
71983219 | 1365 | (set-buffer-file-coding-system coding-system t) |
d0c26c63 KH |
1366 | (if (and enable-multibyte-characters |
1367 | (or (eq coding-system 'no-conversion) | |
ccb77b4e | 1368 | (eq (coding-system-type coding-system) 5)) |
136e48e4 KH |
1369 | ;; If buffer was unmodified and the size is the |
1370 | ;; same as INSERTED, we must be visiting it. | |
1371 | (not modified-p) | |
1372 | (= (buffer-size) inserted)) | |
ccb77b4e RS |
1373 | ;; For coding systems no-conversion and raw-text..., |
1374 | ;; edit the buffer as unibyte. | |
d0c26c63 KH |
1375 | (let ((pos-byte (position-bytes (+ (point) inserted)))) |
1376 | (set-buffer-multibyte nil) | |
1377 | (setq inserted (- pos-byte (position-bytes (point)))))) | |
0269ddfb | 1378 | (set-buffer-modified-p modified-p)))) |
d0c26c63 | 1379 | inserted) |
4ed46869 | 1380 | |
84c9d215 KH |
1381 | (add-hook 'after-insert-file-functions |
1382 | 'after-insert-file-set-buffer-file-coding-system) | |
4ed46869 | 1383 | |
8057896b | 1384 | ;; The coding-spec and eol-type of coding-system returned is decided |
4ed46869 KH |
1385 | ;; independently in the following order. |
1386 | ;; 1. That of buffer-file-coding-system locally bound. | |
1387 | ;; 2. That of CODING. | |
1388 | ||
1389 | (defun find-new-buffer-file-coding-system (coding) | |
1390 | "Return a coding system for a buffer when a file of CODING is inserted. | |
a73a8c89 KH |
1391 | The local variable `buffer-file-coding-system' of the current buffer |
1392 | is set to the returned value. | |
509064c5 | 1393 | Return nil if there's no need to set `buffer-file-coding-system'." |
4ed46869 | 1394 | (let (local-coding local-eol |
b685f8d6 | 1395 | found-coding found-eol |
4ed46869 KH |
1396 | new-coding new-eol) |
1397 | (if (null coding) | |
1398 | ;; Nothing found about coding. | |
1399 | nil | |
1400 | ||
b685f8d6 RS |
1401 | ;; Get information of `buffer-file-coding-system' in LOCAL-EOL |
1402 | ;; and LOCAL-CODING. | |
1403 | (setq local-eol (coding-system-eol-type buffer-file-coding-system)) | |
1404 | (if (null (numberp local-eol)) | |
1405 | ;; But eol-type is not yet set. | |
1406 | (setq local-eol nil)) | |
0269ddfb KH |
1407 | (if (and buffer-file-coding-system |
1408 | (not (eq (coding-system-type buffer-file-coding-system) t))) | |
1409 | ;; This is not `undecided'. | |
1410 | (setq local-coding (coding-system-base buffer-file-coding-system))) | |
b685f8d6 RS |
1411 | |
1412 | (if (and (local-variable-p 'buffer-file-coding-system) | |
1413 | local-eol local-coding) | |
4ed46869 KH |
1414 | ;; The current buffer has already set full coding-system, we |
1415 | ;; had better not change it. | |
1416 | nil | |
1417 | ||
8057896b | 1418 | (setq found-eol (coding-system-eol-type coding)) |
4ed46869 | 1419 | (if (null (numberp found-eol)) |
be02cd54 EZ |
1420 | ;; But eol-type is not found. |
1421 | ;; If EOL conversions are inhibited, force unix eol-type. | |
1422 | (setq found-eol (if inhibit-eol-conversion 0))) | |
c76b5c99 KH |
1423 | (if (eq (coding-system-type coding) t) |
1424 | (setq found-coding 'undecided) | |
1425 | (setq found-coding (coding-system-base coding))) | |
1426 | ||
1427 | (if (and (not found-eol) (eq found-coding 'undecided)) | |
1428 | ;; No valid coding information found. | |
1429 | nil | |
1430 | ||
1431 | ;; Some coding information (eol or text) found. | |
1432 | ||
1433 | ;; The local setting takes precedence over the found one. | |
1434 | (setq new-coding (if (local-variable-p 'buffer-file-coding-system) | |
1435 | (or local-coding found-coding) | |
1436 | (or found-coding local-coding))) | |
1437 | (setq new-eol (if (local-variable-p 'buffer-file-coding-system) | |
1438 | (or local-eol found-eol) | |
1439 | (or found-eol local-eol))) | |
1440 | ||
1441 | (let ((eol-type (coding-system-eol-type new-coding))) | |
1442 | (if (and (numberp new-eol) (vectorp eol-type)) | |
1443 | (aref eol-type new-eol) | |
1444 | new-coding))))))) | |
4ed46869 | 1445 | |
fe831d33 GV |
1446 | (defun modify-coding-system-alist (target-type regexp coding-system) |
1447 | "Modify one of look up tables for finding a coding system on I/O operation. | |
8c453b46 RS |
1448 | There are three of such tables, `file-coding-system-alist', |
1449 | `process-coding-system-alist', and `network-coding-system-alist'. | |
fe831d33 GV |
1450 | |
1451 | TARGET-TYPE specifies which of them to modify. | |
8c453b46 RS |
1452 | If it is `file', it affects `file-coding-system-alist' (which see). |
1453 | If it is `process', it affects `process-coding-system-alist' (which see). | |
e8dd0160 | 1454 | If it is `network', it affects `network-coding-system-alist' (which see). |
fe831d33 GV |
1455 | |
1456 | REGEXP is a regular expression matching a target of I/O operation. | |
1457 | The target is a file name if TARGET-TYPE is `file', a program name if | |
1458 | TARGET-TYPE is `process', or a network service name or a port number | |
1459 | to connect to if TARGET-TYPE is `network'. | |
1460 | ||
1461 | CODING-SYSTEM is a coding system to perform code conversion on the I/O | |
8c453b46 RS |
1462 | operation, or a cons cell (DECODING . ENCODING) specifying the coding systems |
1463 | for decoding and encoding respectively, | |
1464 | or a function symbol which, when called, returns such a cons cell." | |
fe831d33 GV |
1465 | (or (memq target-type '(file process network)) |
1466 | (error "Invalid target type: %s" target-type)) | |
1467 | (or (stringp regexp) | |
1468 | (and (eq target-type 'network) (integerp regexp)) | |
1469 | (error "Invalid regular expression: %s" regexp)) | |
1470 | (if (symbolp coding-system) | |
1471 | (if (not (fboundp coding-system)) | |
1472 | (progn | |
1473 | (check-coding-system coding-system) | |
1474 | (setq coding-system (cons coding-system coding-system)))) | |
1475 | (check-coding-system (car coding-system)) | |
1476 | (check-coding-system (cdr coding-system))) | |
1477 | (cond ((eq target-type 'file) | |
1478 | (let ((slot (assoc regexp file-coding-system-alist))) | |
1479 | (if slot | |
1480 | (setcdr slot coding-system) | |
1481 | (setq file-coding-system-alist | |
1482 | (cons (cons regexp coding-system) | |
1483 | file-coding-system-alist))))) | |
1484 | ((eq target-type 'process) | |
1485 | (let ((slot (assoc regexp process-coding-system-alist))) | |
1486 | (if slot | |
1487 | (setcdr slot coding-system) | |
1488 | (setq process-coding-system-alist | |
1489 | (cons (cons regexp coding-system) | |
1490 | process-coding-system-alist))))) | |
1491 | (t | |
1492 | (let ((slot (assoc regexp network-coding-system-alist))) | |
1493 | (if slot | |
1494 | (setcdr slot coding-system) | |
1495 | (setq network-coding-system-alist | |
1496 | (cons (cons regexp coding-system) | |
1497 | network-coding-system-alist))))))) | |
1498 | ||
b25eef20 | 1499 | (defun make-translation-table (&rest args) |
f967223b | 1500 | "Make a translation table (char table) from arguments. |
13d5617d | 1501 | Each argument is a list of the form (FROM . TO), |
b25eef20 | 1502 | where FROM is a character to be translated to TO. |
13d5617d | 1503 | |
452fdb31 RS |
1504 | FROM can be a generic character (see `make-char'). In this case, TO is |
1505 | a generic character containing the same number of characters, or a | |
1506 | ordinary character. If FROM and TO are both generic characters, all | |
b25eef20 | 1507 | characters belonging to FROM are translated to characters belonging to TO |
4e003d37 KH |
1508 | without changing their position code(s). |
1509 | ||
1510 | The arguments and forms in each argument are processed in the given | |
1511 | order, and if a previous form already translates TO to some other | |
1512 | character, say TO-ALT, FROM is also translated to TO-ALT." | |
f967223b | 1513 | (let ((table (make-char-table 'translation-table)) |
a73a8c89 KH |
1514 | revlist) |
1515 | (while args | |
1516 | (let ((elts (car args))) | |
1517 | (while elts | |
13d5617d KH |
1518 | (let* ((from (car (car elts))) |
1519 | (from-i 0) ; degree of freedom of FROM | |
1520 | (from-rev (nreverse (split-char from))) | |
1521 | (to (cdr (car elts))) | |
1522 | (to-i 0) ; degree of freedom of TO | |
1523 | (to-rev (nreverse (split-char to)))) | |
1524 | ;; Check numbers of heading 0s in FROM-REV and TO-REV. | |
1525 | (while (eq (car from-rev) 0) | |
1526 | (setq from-i (1+ from-i) from-rev (cdr from-rev))) | |
1527 | (while (eq (car to-rev) 0) | |
1528 | (setq to-i (1+ to-i) to-rev (cdr to-rev))) | |
1529 | (if (and (/= from-i to-i) (/= to-i 0)) | |
1530 | (error "Invalid character pair (%d . %d)" from to)) | |
b25eef20 KH |
1531 | ;; If we have already translated TO to TO-ALT, FROM should |
1532 | ;; also be translated to TO-ALT. But, this is only if TO | |
1533 | ;; is a generic character or TO-ALT is not a generic | |
13d5617d KH |
1534 | ;; character. |
1535 | (let ((to-alt (aref table to))) | |
1536 | (if (and to-alt | |
1537 | (or (> to-i 0) (not (generic-char-p to-alt)))) | |
1538 | (setq to to-alt))) | |
1539 | (if (> from-i 0) | |
1540 | (set-char-table-default table from to) | |
1541 | (aset table from to)) | |
b25eef20 KH |
1542 | ;; If we have already translated some chars to FROM, they |
1543 | ;; should also be translated to TO. | |
a73a8c89 KH |
1544 | (let ((l (assq from revlist))) |
1545 | (if l | |
1546 | (let ((ch (car l))) | |
1547 | (setcar l to) | |
1548 | (setq l (cdr l)) | |
1549 | (while l | |
1550 | (aset table ch to) | |
1551 | (setq l (cdr l)) )))) | |
1552 | ;; Now update REVLIST. | |
1553 | (let ((l (assq to revlist))) | |
1554 | (if l | |
1555 | (setcdr l (cons from (cdr l))) | |
1556 | (setq revlist (cons (list to from) revlist))))) | |
1557 | (setq elts (cdr elts)))) | |
1558 | (setq args (cdr args))) | |
1559 | ;; Return TABLE just created. | |
1560 | table)) | |
1561 | ||
c76b5c99 KH |
1562 | (defun make-translation-table-from-vector (vec) |
1563 | "Make translation table from decoding vector VEC. | |
1564 | VEC is an array of 256 elements to map unibyte codes to multibyte characters. | |
1565 | See also the variable `nonascii-translation-table'." | |
1566 | (let ((table (make-char-table 'translation-table)) | |
1567 | (rev-table (make-char-table 'translation-table)) | |
1568 | (i 0) | |
1569 | ch) | |
1570 | (while (< i 256) | |
1571 | (setq ch (aref vec i)) | |
1572 | (aset table i ch) | |
1573 | (if (>= ch 256) | |
1574 | (aset rev-table ch i)) | |
1575 | (setq i (1+ i))) | |
1576 | (set-char-table-extra-slot table 0 rev-table) | |
1577 | table)) | |
1578 | ||
f967223b | 1579 | (defun define-translation-table (symbol &rest args) |
e8dd0160 | 1580 | "Define SYMBOL as a name of translation table made by ARGS. |
b25eef20 | 1581 | |
007c79c8 KH |
1582 | If the first element of ARGS is a char-table of which purpose is |
1583 | translation-table, just define SYMBOL as the name of it. | |
1584 | ||
1585 | In the other case, ARGS are the same as arguments to the function | |
1586 | `make-translation-table' (which see). | |
b25eef20 | 1587 | |
452fdb31 RS |
1588 | This function sets properties `translation-table' and |
1589 | `translation-table-id' of SYMBOL to the created table itself and | |
f967223b | 1590 | identification number of the table respectively." |
007c79c8 KH |
1591 | (let ((table (if (and (char-table-p (car args)) |
1592 | (eq (char-table-subtype (car args)) | |
1593 | 'translation-table)) | |
1594 | (car args) | |
1595 | (apply 'make-translation-table args))) | |
f967223b | 1596 | (len (length translation-table-vector)) |
d9e3229d | 1597 | (id 0) |
b25eef20 | 1598 | (done nil)) |
f967223b | 1599 | (put symbol 'translation-table table) |
b25eef20 KH |
1600 | (while (not done) |
1601 | (if (>= id len) | |
f967223b KH |
1602 | (setq translation-table-vector |
1603 | (vconcat translation-table-vector (make-vector len nil)))) | |
1604 | (let ((slot (aref translation-table-vector id))) | |
b25eef20 KH |
1605 | (if (or (not slot) |
1606 | (eq (car slot) symbol)) | |
1607 | (progn | |
f967223b | 1608 | (aset translation-table-vector id (cons symbol table)) |
007c79c8 KH |
1609 | (setq done t)) |
1610 | (setq id (1+ id))))) | |
f967223b | 1611 | (put symbol 'translation-table-id id) |
d9e3229d KH |
1612 | id)) |
1613 | ||
35554641 KH |
1614 | (put 'with-category-table 'lisp-indent-function 1) |
1615 | ||
1616 | (defmacro with-category-table (category-table &rest body) | |
1617 | `(let ((current-category-table (category-table))) | |
1618 | (set-category-table ,category-table) | |
1619 | (unwind-protect | |
1620 | (progn ,@body) | |
1621 | (set-category-table current-category-table)))) | |
1622 | ||
69eba008 KH |
1623 | ;;; Initialize some variables. |
1624 | ||
1625 | (put 'use-default-ascent 'char-table-extra-slots 0) | |
1626 | (setq use-default-ascent (make-char-table 'use-default-ascent)) | |
d6d6d592 KH |
1627 | (put 'ignore-relative-composition 'char-table-extra-slots 0) |
1628 | (setq ignore-relative-composition | |
1629 | (make-char-table 'ignore-relative-composition)) | |
69eba008 KH |
1630 | |
1631 | ;;; | |
4ed46869 KH |
1632 | (provide 'mule) |
1633 | ||
1634 | ;;; mule.el ends here |