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4ed46869 KH |
1 | ;;; mule.el --- basic commands for mulitilingual environment |
2 | ||
4ed46869 | 3 | ;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN. |
41cd7d67 | 4 | ;; Copyright (C) 2001 Free Software Foundation, Inc. |
58cfed09 | 5 | ;; Licensed to the Free Software Foundation. |
4ed46869 KH |
6 | |
7 | ;; Keywords: mule, multilingual, character set, coding system | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation; either version 2, or (at your option) | |
14 | ;; any later version. | |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
369314dc KH |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
4ed46869 | 25 | |
60370d40 PJ |
26 | ;;; Commentary: |
27 | ||
4ed46869 KH |
28 | ;;; Code: |
29 | ||
d2542b42 | 30 | (defconst mule-version "5.0 (SAKAKI)" "\ |
4ed46869 KH |
31 | Version number and name of this version of MULE (multilingual environment).") |
32 | ||
35554641 | 33 | (defconst mule-version-date "1999.12.7" "\ |
4ed46869 KH |
34 | Distribution date of this version of MULE (multilingual environment).") |
35 | ||
36 | (defun load-with-code-conversion (fullname file &optional noerror nomessage) | |
0f69cb38 KH |
37 | "Execute a file of Lisp code named FILE whose absolute name is FULLNAME. |
38 | The file contents are decoded before evaluation if necessary. | |
4ed46869 KH |
39 | If optional second arg NOERROR is non-nil, |
40 | report no error if FILE doesn't exist. | |
41 | Print messages at start and end of loading unless | |
42 | optional third arg NOMESSAGE is non-nil. | |
43 | Return t if file exists." | |
44 | (if (null (file-readable-p fullname)) | |
45 | (and (null noerror) | |
46 | (signal 'file-error (list "Cannot open load file" file))) | |
47 | ;; Read file with code conversion, and then eval. | |
48 | (let* ((buffer | |
49 | ;; To avoid any autoloading, set default-major-mode to | |
50 | ;; fundamental-mode. | |
88162676 RS |
51 | ;; So that we don't get completely screwed if the |
52 | ;; file is encoded in some complicated character set, | |
53 | ;; read it with real decoding, as a multibyte buffer, | |
54 | ;; even if this is a --unibyte Emacs session. | |
55 | (let ((default-major-mode 'fundamental-mode) | |
56 | (default-enable-multibyte-characters t)) | |
4ed46869 KH |
57 | ;; We can't use `generate-new-buffer' because files.el |
58 | ;; is not yet loaded. | |
59 | (get-buffer-create (generate-new-buffer-name " *load*")))) | |
db5cae4b SM |
60 | (load-in-progress t) |
61 | (source (save-match-data (string-match "\\.el\\'" fullname)))) | |
62 | (unless nomessage | |
63 | (if source | |
64 | (message "Loading %s (source)..." file) | |
65 | (message "Loading %s..." file))) | |
66 | (when purify-flag | |
67 | (setq preloaded-file-list (cons file preloaded-file-list))) | |
4ed46869 | 68 | (unwind-protect |
a6acd8a2 | 69 | (let ((load-file-name fullname) |
1c4cc63a | 70 | (set-auto-coding-for-load t) |
a6acd8a2 | 71 | (inhibit-file-name-operation nil)) |
4ed46869 KH |
72 | (save-excursion |
73 | (set-buffer buffer) | |
74 | (insert-file-contents fullname) | |
7d276780 EZ |
75 | ;; If the loaded file was inserted with no-conversion or |
76 | ;; raw-text coding system, make the buffer unibyte. | |
77 | ;; Otherwise, eval-buffer might try to interpret random | |
78 | ;; binary junk as multibyte characters. | |
79 | (if (and enable-multibyte-characters | |
80 | (or (eq (coding-system-type last-coding-system-used) 5) | |
81 | (eq last-coding-system-used 'no-conversion))) | |
82 | (set-buffer-multibyte nil)) | |
4ed46869 KH |
83 | ;; Make `kill-buffer' quiet. |
84 | (set-buffer-modified-p nil)) | |
0f69cb38 | 85 | ;; Have the original buffer current while we eval. |
88162676 RS |
86 | (eval-buffer buffer nil file |
87 | ;; If this Emacs is running with --unibyte, | |
88 | ;; convert multibyte strings to unibyte | |
89 | ;; after reading them. | |
ba74e833 | 90 | ;; (not default-enable-multibyte-characters) |
8dd08b5b | 91 | nil t |
ba74e833 | 92 | )) |
cfc70cdf RS |
93 | (let (kill-buffer-hook kill-buffer-query-functions) |
94 | (kill-buffer buffer))) | |
4ed46869 | 95 | (let ((hook (assoc file after-load-alist))) |
db5cae4b SM |
96 | (when hook |
97 | (mapcar (function eval) (cdr hook)))) | |
98 | (unless (or nomessage noninteractive) | |
99 | (if source | |
100 | (message "Loading %s (source)...done" file) | |
101 | (message "Loading %s...done" file))) | |
4ed46869 KH |
102 | t))) |
103 | ||
104 | ;; API (Application Program Interface) for charsets. | |
105 | ||
2e02a76f | 106 | (defsubst charset-quoted-standard-p (obj) |
521d4010 | 107 | "Return t if OBJ is a quoted symbol, and is the name of a standard charset." |
2e02a76f RS |
108 | (and (listp obj) (eq (car obj) 'quote) |
109 | (symbolp (car-safe (cdr obj))) | |
110 | (let ((vector (get (car-safe (cdr obj)) 'charset))) | |
111 | (and (vectorp vector) | |
112 | (< (aref vector 0) 160))))) | |
4ed46869 KH |
113 | |
114 | (defsubst charsetp (object) | |
e4a7fdfc | 115 | "T if OBJECT is a charset." |
4ed46869 KH |
116 | (and (symbolp object) (vectorp (get object 'charset)))) |
117 | ||
118 | (defsubst charset-info (charset) | |
119 | "Return a vector of information of CHARSET. | |
120 | The elements of the vector are: | |
121 | CHARSET-ID, BYTES, DIMENSION, CHARS, WIDTH, DIRECTION, | |
122 | LEADING-CODE-BASE, LEADING-CODE-EXT, | |
123 | ISO-FINAL-CHAR, ISO-GRAPHIC-PLANE, | |
124 | REVERSE-CHARSET, SHORT-NAME, LONG-NAME, DESCRIPTION, | |
125 | PLIST, | |
126 | where | |
127 | CHARSET-ID (integer) is the identification number of the charset. | |
aa8bb645 KH |
128 | BYTES (integer) is the length of multi-byte form of a character in |
129 | the charset: one of 1, 2, 3, and 4. | |
4ed46869 KH |
130 | DIMENSION (integer) is the number of bytes to represent a character of |
131 | the charset: 1 or 2. | |
132 | CHARS (integer) is the number of characters in a dimension: 94 or 96. | |
4ed46869 KH |
133 | WIDTH (integer) is the number of columns a character in the charset |
134 | occupies on the screen: one of 0, 1, and 2. | |
135 | DIRECTION (integer) is the rendering direction of characters in the | |
08b4ace5 KH |
136 | charset when rendering. If 0, render from left to right, else |
137 | render from right to left. | |
4ed46869 KH |
138 | LEADING-CODE-BASE (integer) is the base leading-code for the |
139 | charset. | |
140 | LEADING-CODE-EXT (integer) is the extended leading-code for the | |
141 | charset. All charsets of less than 0xA0 has the value 0. | |
142 | ISO-FINAL-CHAR (character) is the final character of the | |
7dd4c92d KH |
143 | corresponding ISO 2022 charset. If the charset is not assigned |
144 | any final character, the value is -1. | |
4ed46869 KH |
145 | ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked |
146 | while encoding to variants of ISO 2022 coding system, one of the | |
147 | following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR). | |
7dd4c92d | 148 | If the charset is not assigned any final character, the value is -1. |
4ed46869 KH |
149 | REVERSE-CHARSET (integer) is the charset which differs only in |
150 | LEFT-TO-RIGHT value from the charset. If there's no such a | |
151 | charset, the value is -1. | |
152 | SHORT-NAME (string) is the short name to refer to the charset. | |
153 | LONG-NAME (string) is the long name to refer to the charset | |
154 | DESCRIPTION (string) is the description string of the charset. | |
155 | PLIST (property list) may contain any type of information a user | |
156 | want to put and get by functions `put-charset-property' and | |
157 | `get-charset-property' respectively." | |
158 | (get charset 'charset)) | |
159 | ||
40c81f74 PE |
160 | ;; It is better not to use backquote in this file, |
161 | ;; because that makes a bootstrapping problem | |
162 | ;; if you need to recompile all the Lisp files using interpreted code. | |
163 | ||
4ed46869 KH |
164 | (defmacro charset-id (charset) |
165 | "Return charset identification number of CHARSET." | |
2e02a76f | 166 | (if (charset-quoted-standard-p charset) |
4ed46869 | 167 | (aref (charset-info (nth 1 charset)) 0) |
40c81f74 | 168 | (list 'aref (list 'charset-info charset) 0))) |
4ed46869 KH |
169 | |
170 | (defmacro charset-bytes (charset) | |
900dc6e3 KH |
171 | "Return bytes of CHARSET. |
172 | See the function `charset-info' for more detail." | |
2e02a76f | 173 | (if (charset-quoted-standard-p charset) |
4ed46869 | 174 | (aref (charset-info (nth 1 charset)) 1) |
40c81f74 | 175 | (list 'aref (list 'charset-info charset) 1))) |
4ed46869 KH |
176 | |
177 | (defmacro charset-dimension (charset) | |
900dc6e3 KH |
178 | "Return dimension of CHARSET. |
179 | See the function `charset-info' for more detail." | |
2e02a76f | 180 | (if (charset-quoted-standard-p charset) |
4ed46869 | 181 | (aref (charset-info (nth 1 charset)) 2) |
40c81f74 | 182 | (list 'aref (list 'charset-info charset) 2))) |
4ed46869 KH |
183 | |
184 | (defmacro charset-chars (charset) | |
900dc6e3 KH |
185 | "Return character numbers contained in a dimension of CHARSET. |
186 | See the function `charset-info' for more detail." | |
2e02a76f | 187 | (if (charset-quoted-standard-p charset) |
4ed46869 | 188 | (aref (charset-info (nth 1 charset)) 3) |
40c81f74 | 189 | (list 'aref (list 'charset-info charset) 3))) |
4ed46869 KH |
190 | |
191 | (defmacro charset-width (charset) | |
900dc6e3 KH |
192 | "Return width (how many column occupied on a screen) of CHARSET. |
193 | See the function `charset-info' for more detail." | |
2e02a76f | 194 | (if (charset-quoted-standard-p charset) |
4ed46869 | 195 | (aref (charset-info (nth 1 charset)) 4) |
40c81f74 | 196 | (list 'aref (list 'charset-info charset) 4))) |
4ed46869 KH |
197 | |
198 | (defmacro charset-direction (charset) | |
900dc6e3 KH |
199 | "Return direction of CHARSET. |
200 | See the function `charset-info' for more detail." | |
2e02a76f | 201 | (if (charset-quoted-standard-p charset) |
4ed46869 | 202 | (aref (charset-info (nth 1 charset)) 5) |
40c81f74 | 203 | (list 'aref (list 'charset-info charset) 5))) |
4ed46869 KH |
204 | |
205 | (defmacro charset-iso-final-char (charset) | |
900dc6e3 KH |
206 | "Return final char of CHARSET. |
207 | See the function `charset-info' for more detail." | |
2e02a76f | 208 | (if (charset-quoted-standard-p charset) |
4ed46869 | 209 | (aref (charset-info (nth 1 charset)) 8) |
40c81f74 | 210 | (list 'aref (list 'charset-info charset) 8))) |
4ed46869 KH |
211 | |
212 | (defmacro charset-iso-graphic-plane (charset) | |
900dc6e3 KH |
213 | "Return graphic plane of CHARSET. |
214 | See the function `charset-info' for more detail." | |
2e02a76f | 215 | (if (charset-quoted-standard-p charset) |
4ed46869 | 216 | (aref (charset-info (nth 1 charset)) 9) |
40c81f74 | 217 | (list 'aref (list 'charset-info charset) 9))) |
4ed46869 KH |
218 | |
219 | (defmacro charset-reverse-charset (charset) | |
900dc6e3 KH |
220 | "Return reverse charset of CHARSET. |
221 | See the function `charset-info' for more detail." | |
2e02a76f | 222 | (if (charset-quoted-standard-p charset) |
4ed46869 | 223 | (aref (charset-info (nth 1 charset)) 10) |
40c81f74 | 224 | (list 'aref (list 'charset-info charset) 10))) |
4ed46869 KH |
225 | |
226 | (defmacro charset-short-name (charset) | |
900dc6e3 KH |
227 | "Return short name of CHARSET. |
228 | See the function `charset-info' for more detail." | |
2e02a76f | 229 | (if (charset-quoted-standard-p charset) |
4ed46869 | 230 | (aref (charset-info (nth 1 charset)) 11) |
40c81f74 | 231 | (list 'aref (list 'charset-info charset) 11))) |
4ed46869 KH |
232 | |
233 | (defmacro charset-long-name (charset) | |
900dc6e3 KH |
234 | "Return long name of CHARSET. |
235 | See the function `charset-info' for more detail." | |
2e02a76f | 236 | (if (charset-quoted-standard-p charset) |
4ed46869 | 237 | (aref (charset-info (nth 1 charset)) 12) |
40c81f74 | 238 | (list 'aref (list 'charset-info charset) 12))) |
4ed46869 KH |
239 | |
240 | (defmacro charset-description (charset) | |
0611934b | 241 | "Return description of CHARSET. |
900dc6e3 | 242 | See the function `charset-info' for more detail." |
2e02a76f | 243 | (if (charset-quoted-standard-p charset) |
4ed46869 | 244 | (aref (charset-info (nth 1 charset)) 13) |
40c81f74 | 245 | (list 'aref (list 'charset-info charset) 13))) |
4ed46869 KH |
246 | |
247 | (defmacro charset-plist (charset) | |
900dc6e3 KH |
248 | "Return list charset property of CHARSET. |
249 | See the function `charset-info' for more detail." | |
40c81f74 PE |
250 | (list 'aref |
251 | (if (charset-quoted-standard-p charset) | |
252 | (charset-info (nth 1 charset)) | |
253 | (list 'charset-info charset)) | |
254 | 14)) | |
4ed46869 KH |
255 | |
256 | (defun set-charset-plist (charset plist) | |
e8dd0160 | 257 | "Set CHARSET's property list to PLIST, and return PLIST." |
4ed46869 KH |
258 | (aset (charset-info charset) 14 plist)) |
259 | ||
d3e7e7cf EZ |
260 | (defun make-char (charset &optional code1 code2) |
261 | "Return a character of CHARSET whose position codes are CODE1 and CODE2. | |
f98e2797 | 262 | CODE1 and CODE2 are optional, but if you don't supply |
a9fb0b58 KH |
263 | sufficient position codes, return a generic character which stands for |
264 | all characters or group of characters in the character set. | |
d3e7e7cf | 265 | A generic character can be used to index a char table (e.g. syntax-table). |
9ff05eae KH |
266 | |
267 | Such character sets as ascii, eight-bit-control, and eight-bit-graphic | |
268 | don't have corresponding generic characters. If CHARSET is one of | |
269 | them and you don't supply CODE1, return the character of the smallest | |
270 | code in CHARSET. | |
271 | ||
d3e7e7cf | 272 | If CODE1 or CODE2 are invalid (out of range), this function signals an error." |
636799f2 | 273 | (make-char-internal (charset-id charset) code1 code2)) |
a6acd8a2 KH |
274 | |
275 | (put 'make-char 'byte-compile | |
521d4010 | 276 | (function |
a6acd8a2 KH |
277 | (lambda (form) |
278 | (let ((charset (nth 1 form))) | |
279 | (if (charset-quoted-standard-p charset) | |
280 | (byte-compile-normal-call | |
281 | (cons 'make-char-internal | |
282 | (cons (charset-id (nth 1 charset)) (nthcdr 2 form)))) | |
283 | (byte-compile-normal-call | |
284 | (cons 'make-char-internal | |
285 | (cons (list 'charset-id charset) (nthcdr 2 form))))))))) | |
4ed46869 | 286 | |
d3675a42 | 287 | (defun charset-list () |
900dc6e3 KH |
288 | "Return list of charsets ever defined. |
289 | ||
d3675a42 | 290 | This function is provided for backward compatibility. |
900dc6e3 | 291 | Now we have the variable `charset-list'." |
d3675a42 KH |
292 | charset-list) |
293 | ||
13d5617d KH |
294 | (defsubst generic-char-p (char) |
295 | "Return t if and only if CHAR is a generic character. | |
521d4010 | 296 | See also the documentation of `make-char'." |
1d935669 KH |
297 | (and (>= char 0400) |
298 | (let ((l (split-char char))) | |
299 | (and (or (= (nth 1 l) 0) (eq (nth 2 l) 0)) | |
300 | (not (eq (car l) 'composition)))))) | |
69eba008 | 301 | |
cc57cc54 | 302 | (defun decode-char (ccs code-point &optional restriction) |
7f341749 | 303 | "Return character specified by coded character set CCS and CODE-POINT in it. |
cc57cc54 | 304 | Return nil if such a character is not supported. |
e76938e7 DL |
305 | Currently the only supported coded character set is `ucs' (ISO/IEC |
306 | 10646: Universal Multi-Octet Coded Character Set). | |
cc57cc54 KH |
307 | |
308 | Optional argument RESTRICTION specifies a way to map the pair of CCS | |
f7492bc7 | 309 | and CODE-POINT to a character. Currently not supported and just ignored." |
cc57cc54 | 310 | (cond ((eq ccs 'ucs) |
6ba9b20b | 311 | (cond ((< code-point 160) |
cc57cc54 KH |
312 | code-point) |
313 | ((< code-point 256) | |
314 | (make-char 'latin-iso8859-1 code-point)) | |
315 | ((< code-point #x2500) | |
316 | (setq code-point (- code-point #x0100)) | |
521d4010 | 317 | (make-char 'mule-unicode-0100-24ff |
cc57cc54 | 318 | (+ (/ code-point 96) 32) (+ (% code-point 96) 32))) |
6ba9b20b | 319 | ((< code-point #x3400) |
cc57cc54 KH |
320 | (setq code-point (- code-point #x2500)) |
321 | (make-char 'mule-unicode-2500-33ff | |
322 | (+ (/ code-point 96) 32) (+ (% code-point 96) 32))) | |
323 | ((and (>= code-point #xe000) (< code-point #x10000)) | |
324 | (setq code-point (- code-point #xe000)) | |
325 | (make-char 'mule-unicode-e000-ffff | |
326 | (+ (/ code-point 96) 32) (+ (% code-point 96) 32))) | |
327 | )))) | |
328 | ||
329 | (defun encode-char (char ccs &optional restriction) | |
7f341749 | 330 | "Return code-point in coded character set CCS that corresponds to CHAR. |
cc57cc54 | 331 | Return nil if CHAR is not included in CCS. |
e76938e7 DL |
332 | Currently the only supported coded character set is `ucs' (ISO/IEC |
333 | 10646: Universal Multi-Octet Coded Character Set). | |
7f341749 KH |
334 | |
335 | CHAR should be in one of these charsets: | |
cc57cc54 | 336 | ascii, latin-iso8859-1, mule-unicode-0100-24ff, mule-unicode-2500-33ff, |
6ba9b20b | 337 | mule-unicode-e000-ffff, eight-bit-control |
cc57cc54 KH |
338 | Otherwise, return nil. |
339 | ||
340 | Optional argument RESTRICTION specifies a way to map CHAR to a | |
341 | code-point in CCS. Currently not supported and just ignored." | |
342 | (let* ((split (split-char char)) | |
343 | (charset (car split))) | |
344 | (cond ((eq ccs 'ucs) | |
345 | (cond ((eq charset 'ascii) | |
346 | char) | |
347 | ((eq charset 'latin-iso8859-1) | |
348 | (+ (nth 1 split) 128)) | |
349 | ((eq charset 'mule-unicode-0100-24ff) | |
350 | (+ #x0100 (+ (* (- (nth 1 split) 32) 96) | |
351 | (- (nth 2 split) 32)))) | |
352 | ((eq charset 'mule-unicode-2500-33ff) | |
353 | (+ #x2500 (+ (* (- (nth 1 split) 32) 96) | |
354 | (- (nth 2 split) 32)))) | |
355 | ((eq charset 'mule-unicode-e000-ffff) | |
356 | (+ #xe000 (+ (* (- (nth 1 split) 32) 96) | |
6ba9b20b KH |
357 | (- (nth 2 split) 32)))) |
358 | ((eq charset 'eight-bit-control) | |
359 | char)))))) | |
cc57cc54 | 360 | |
0269ddfb | 361 | \f |
e76938e7 | 362 | ;; Coding system stuff |
4ed46869 | 363 | |
8057896b | 364 | ;; Coding system is a symbol that has the property `coding-system'. |
4ed46869 | 365 | ;; |
8057896b KH |
366 | ;; The value of the property `coding-system' is a vector of the |
367 | ;; following format: | |
d3675a42 | 368 | ;; [TYPE MNEMONIC DOC-STRING PLIST FLAGS] |
8057896b | 369 | ;; We call this vector as coding-spec. See comments in src/coding.c |
521d4010 | 370 | ;; for more detail. |
8057896b KH |
371 | |
372 | (defconst coding-spec-type-idx 0) | |
373 | (defconst coding-spec-mnemonic-idx 1) | |
374 | (defconst coding-spec-doc-string-idx 2) | |
0269ddfb | 375 | (defconst coding-spec-plist-idx 3) |
8057896b KH |
376 | (defconst coding-spec-flags-idx 4) |
377 | ||
a6acd8a2 KH |
378 | ;; PLIST is a property list of a coding system. To share PLIST among |
379 | ;; alias coding systems, a coding system has PLIST in coding-spec | |
380 | ;; instead of having it in normal property list of Lisp symbol. | |
381 | ;; Here's a list of coding system properties currently being used. | |
0269ddfb KH |
382 | ;; |
383 | ;; o coding-category | |
384 | ;; | |
385 | ;; The value is a coding category the coding system belongs to. The | |
521d4010 | 386 | ;; function `make-coding-system' sets this value automatically |
1b46a680 | 387 | ;; unless its argument PROPERTIES specifies this property. |
4ed46869 | 388 | ;; |
0269ddfb | 389 | ;; o alias-coding-systems |
4ed46869 | 390 | ;; |
0269ddfb KH |
391 | ;; The value is a list of coding systems of the same alias group. The |
392 | ;; first element is the coding system made at first, which we call as | |
1b46a680 KH |
393 | ;; `base coding system'. The function `make-coding-system' sets this |
394 | ;; value automatically and `define-coding-system-alias' updates it. | |
0269ddfb | 395 | ;; |
3c948dde KH |
396 | ;; See the documentation of make-coding-system for the meanings of the |
397 | ;; following properties. | |
4ed46869 | 398 | ;; |
3c948dde | 399 | ;; o post-read-conversion |
0269ddfb | 400 | ;; o pre-write-conversion |
f967223b | 401 | ;; o translation-table-for-decode |
f967223b | 402 | ;; o translation-table-for-encode |
c11a8f77 | 403 | ;; o safe-chars |
a6acd8a2 | 404 | ;; o safe-charsets |
b25eef20 | 405 | ;; o mime-charset |
c76b5c99 | 406 | ;; o valid-codes (meaningful only for a coding system based on CCL) |
c76b5c99 | 407 | |
0269ddfb | 408 | |
0269ddfb | 409 | (defsubst coding-system-spec (coding-system) |
521d4010 | 410 | "Return coding-spec of CODING-SYSTEM." |
0269ddfb | 411 | (get (check-coding-system coding-system) 'coding-system)) |
4ed46869 | 412 | |
4ed46869 | 413 | (defun coding-system-type (coding-system) |
0269ddfb KH |
414 | "Return the coding type of CODING-SYSTEM. |
415 | A coding type is an integer value indicating the encoding method | |
416 | of CODING-SYSTEM. See the function `make-coding-system' for more detail." | |
417 | (aref (coding-system-spec coding-system) coding-spec-type-idx)) | |
4ed46869 | 418 | |
4ed46869 | 419 | (defun coding-system-mnemonic (coding-system) |
0269ddfb | 420 | "Return the mnemonic character of CODING-SYSTEM. |
6e2c8840 KH |
421 | The mnemonic character of a coding system is used in mode line |
422 | to indicate the coding system. If the arg is nil, return ?-." | |
423 | (let ((spec (coding-system-spec coding-system))) | |
424 | (if spec (aref spec coding-spec-mnemonic-idx) ?-))) | |
4ed46869 | 425 | |
8057896b | 426 | (defun coding-system-doc-string (coding-system) |
0269ddfb KH |
427 | "Return the documentation string for CODING-SYSTEM." |
428 | (aref (coding-system-spec coding-system) coding-spec-doc-string-idx)) | |
4ed46869 | 429 | |
d3675a42 | 430 | (defun coding-system-plist (coding-system) |
0269ddfb KH |
431 | "Return the property list of CODING-SYSTEM." |
432 | (aref (coding-system-spec coding-system) coding-spec-plist-idx)) | |
d3675a42 | 433 | |
4ed46869 | 434 | (defun coding-system-flags (coding-system) |
0269ddfb KH |
435 | "Return `flags' of CODING-SYSTEM. |
436 | A `flags' of a coding system is a vector of length 32 indicating detailed | |
437 | information of a coding system. See the function `make-coding-system' | |
438 | for more detail." | |
439 | (aref (coding-system-spec coding-system) coding-spec-flags-idx)) | |
440 | ||
441 | (defun coding-system-get (coding-system prop) | |
442 | "Extract a value from CODING-SYSTEM's property list for property PROP." | |
443 | (plist-get (coding-system-plist coding-system) prop)) | |
444 | ||
445 | (defun coding-system-put (coding-system prop val) | |
446 | "Change value in CODING-SYSTEM's property list PROP to VAL." | |
447 | (let ((plist (coding-system-plist coding-system))) | |
448 | (if plist | |
449 | (plist-put plist prop val) | |
450 | (aset (coding-system-spec coding-system) coding-spec-plist-idx | |
451 | (list prop val))))) | |
452 | ||
453 | (defun coding-system-category (coding-system) | |
72f73748 DL |
454 | "Return the coding category of CODING-SYSTEM. |
455 | See also `coding-category-list'." | |
0269ddfb KH |
456 | (coding-system-get coding-system 'coding-category)) |
457 | ||
458 | (defun coding-system-base (coding-system) | |
459 | "Return the base coding system of CODING-SYSTEM. | |
d9e3229d KH |
460 | A base coding system is what made by `make-coding-system'. |
461 | Any alias nor subsidiary coding systems are not base coding system." | |
0269ddfb KH |
462 | (car (coding-system-get coding-system 'alias-coding-systems))) |
463 | ||
464 | (defalias 'coding-system-parent 'coding-system-base) | |
2598a293 | 465 | (make-obsolete 'coding-system-parent 'coding-system-base "20.3") |
0269ddfb KH |
466 | |
467 | ;; Coding system also has a property `eol-type'. | |
468 | ;; | |
469 | ;; This property indicates how the coding system handles end-of-line | |
470 | ;; format. The value is integer 0, 1, 2, or a vector of three coding | |
471 | ;; systems. Each integer value 0, 1, and 2 indicates the format of | |
472 | ;; end-of-line LF, CRLF, and CR respectively. A vector value | |
473 | ;; indicates that the format of end-of-line should be detected | |
474 | ;; automatically. Nth element of the vector is the subsidiary coding | |
475 | ;; system whose `eol-type' property is N. | |
4ed46869 | 476 | |
8057896b | 477 | (defun coding-system-eol-type (coding-system) |
0269ddfb KH |
478 | "Return eol-type of CODING-SYSTEM. |
479 | An eol-type is integer 0, 1, 2, or a vector of coding systems. | |
4ed46869 | 480 | |
0269ddfb KH |
481 | Integer values 0, 1, and 2 indicate a format of end-of-line; LF, |
482 | CRLF, and CR respectively. | |
483 | ||
484 | A vector value indicates that a format of end-of-line should be | |
485 | detected automatically. Nth element of the vector is the subsidiary | |
486 | coding system whose eol-type is N." | |
487 | (get coding-system 'eol-type)) | |
bd882697 | 488 | |
857ea15c AS |
489 | (defun coding-system-lessp (x y) |
490 | (cond ((eq x 'no-conversion) t) | |
491 | ((eq y 'no-conversion) nil) | |
492 | ((eq x 'emacs-mule) t) | |
493 | ((eq y 'emacs-mule) nil) | |
494 | ((eq x 'undecided) t) | |
495 | ((eq y 'undecided) nil) | |
496 | (t (let ((c1 (coding-system-mnemonic x)) | |
497 | (c2 (coding-system-mnemonic y))) | |
498 | (or (< (downcase c1) (downcase c2)) | |
499 | (and (not (> (downcase c1) (downcase c2))) | |
500 | (< c1 c2))))))) | |
501 | ||
857ea15c | 502 | (defun add-to-coding-system-list (coding-system) |
521d4010 | 503 | "Add CODING-SYSTEM to `coding-system-list' while keeping it sorted." |
857ea15c AS |
504 | (if (or (null coding-system-list) |
505 | (coding-system-lessp coding-system (car coding-system-list))) | |
506 | (setq coding-system-list (cons coding-system coding-system-list)) | |
507 | (let ((len (length coding-system-list)) | |
508 | mid (tem coding-system-list)) | |
509 | (while (> len 1) | |
510 | (setq mid (nthcdr (/ len 2) tem)) | |
511 | (if (coding-system-lessp (car mid) coding-system) | |
512 | (setq tem mid | |
513 | len (- len (/ len 2))) | |
514 | (setq len (/ len 2)))) | |
515 | (setcdr tem (cons coding-system (cdr tem)))))) | |
516 | ||
80a7463d | 517 | (defun coding-system-list (&optional base-only) |
c11a8f77 KH |
518 | "Return a list of all existing non-subsidiary coding systems. |
519 | If optional arg BASE-ONLY is non-nil, only base coding systems are listed. | |
520 | The value doesn't include subsidiary coding systems which are what | |
521 | made from bases and aliases automatically for various end-of-line | |
522 | formats (e.g. iso-latin-1-unix, koi8-r-dos)." | |
80a7463d KH |
523 | (let* ((codings (copy-sequence coding-system-list)) |
524 | (tail (cons nil codings))) | |
525 | ;; Remove subsidiary coding systems (eol variants) and alias | |
526 | ;; coding systems (if necessary). | |
527 | (while (cdr tail) | |
528 | (let* ((coding (car (cdr tail))) | |
529 | (aliases (coding-system-get coding 'alias-coding-systems))) | |
530 | (if (or | |
531 | ;; CODING is an eol variant if not in ALIASES. | |
532 | (not (memq coding aliases)) | |
533 | ;; CODING is an alias if it is not car of ALIASES. | |
534 | (and base-only (not (eq coding (car aliases))))) | |
535 | (setcdr tail (cdr (cdr tail))) | |
536 | (setq tail (cdr tail))))) | |
537 | codings)) | |
538 | ||
c11a8f77 KH |
539 | (defun register-char-codings (coding-system safe-chars) |
540 | (let ((general (char-table-extra-slot char-coding-system-table 0))) | |
541 | (if (eq safe-chars t) | |
542 | (or (memq coding-system general) | |
543 | (set-char-table-extra-slot char-coding-system-table 0 | |
544 | (cons coding-system general))) | |
545 | (map-char-table | |
546 | (function | |
547 | (lambda (key val) | |
548 | (if (and (>= key 128) val) | |
549 | (let ((codings (aref char-coding-system-table key))) | |
550 | (or (memq coding-system codings) | |
551 | (aset char-coding-system-table key | |
552 | (cons coding-system codings))))))) | |
553 | safe-chars)))) | |
554 | ||
555 | ||
6e9722b0 | 556 | (defun make-subsidiary-coding-system (coding-system) |
521d4010 | 557 | "Make subsidiary coding systems (eol-type variants) of CODING-SYSTEM." |
0269ddfb KH |
558 | (let ((coding-spec (coding-system-spec coding-system)) |
559 | (subsidiaries (vector (intern (format "%s-unix" coding-system)) | |
8057896b KH |
560 | (intern (format "%s-dos" coding-system)) |
561 | (intern (format "%s-mac" coding-system)))) | |
0269ddfb KH |
562 | (i 0) |
563 | temp) | |
8057896b | 564 | (while (< i 3) |
0269ddfb | 565 | (put (aref subsidiaries i) 'coding-system coding-spec) |
8057896b | 566 | (put (aref subsidiaries i) 'eol-type i) |
857ea15c | 567 | (add-to-coding-system-list (aref subsidiaries i)) |
0269ddfb KH |
568 | (setq coding-system-alist |
569 | (cons (list (symbol-name (aref subsidiaries i))) | |
570 | coding-system-alist)) | |
8057896b KH |
571 | (setq i (1+ i))) |
572 | subsidiaries)) | |
4ed46869 | 573 | |
50c29104 KH |
574 | (defun transform-make-coding-system-args (name type &optional doc-string props) |
575 | "For internal use only. | |
576 | Transform XEmacs style args for `make-coding-system' to Emacs style. | |
577 | Value is a list of transformed arguments." | |
578 | (let ((mnemonic (string-to-char (or (plist-get props 'mnemonic) "?"))) | |
579 | (eol-type (plist-get props 'eol-type)) | |
580 | properties tmp) | |
581 | (cond | |
582 | ((eq eol-type 'lf) (setq eol-type 'unix)) | |
583 | ((eq eol-type 'crlf) (setq eol-type 'dos)) | |
584 | ((eq eol-type 'cr) (setq eol-type 'mac))) | |
585 | (if (setq tmp (plist-get props 'post-read-conversion)) | |
586 | (setq properties (plist-put properties 'post-read-conversion tmp))) | |
587 | (if (setq tmp (plist-get props 'pre-write-conversion)) | |
588 | (setq properties (plist-put properties 'pre-write-conversion tmp))) | |
589 | (cond | |
f4a012a6 KH |
590 | ((eq type 'shift-jis) |
591 | `(,name 1 ,mnemonic ,doc-string () ,properties ,eol-type)) | |
592 | ((eq type 'iso2022) ; This is not perfect. | |
593 | (if (plist-get props 'escape-quoted) | |
594 | (error "escape-quoted is not supported: %S" | |
595 | `(,name ,type ,doc-string ,props))) | |
596 | (let ((g0 (plist-get props 'charset-g0)) | |
597 | (g1 (plist-get props 'charset-g1)) | |
598 | (g2 (plist-get props 'charset-g2)) | |
599 | (g3 (plist-get props 'charset-g3)) | |
600 | (use-roman | |
601 | (and | |
602 | (eq (cadr (assoc 'latin-jisx0201 | |
603 | (plist-get props 'input-charset-conversion))) | |
604 | 'ascii) | |
605 | (eq (cadr (assoc 'ascii | |
606 | (plist-get props 'output-charset-conversion))) | |
607 | 'latin-jisx0201))) | |
608 | (use-oldjis | |
609 | (and | |
610 | (eq (cadr (assoc 'japanese-jisx0208-1978 | |
611 | (plist-get props 'input-charset-conversion))) | |
612 | 'japanese-jisx0208) | |
613 | (eq (cadr (assoc 'japanese-jisx0208 | |
614 | (plist-get props 'output-charset-conversion))) | |
615 | 'japanese-jisx0208-1978)))) | |
616 | (if (charsetp g0) | |
617 | (if (plist-get props 'force-g0-on-output) | |
618 | (setq g0 `(nil ,g0)) | |
619 | (setq g0 `(,g0 t)))) | |
620 | (if (charsetp g1) | |
621 | (if (plist-get props 'force-g1-on-output) | |
622 | (setq g1 `(nil ,g1)) | |
623 | (setq g1 `(,g1 t)))) | |
624 | (if (charsetp g2) | |
625 | (if (plist-get props 'force-g2-on-output) | |
626 | (setq g2 `(nil ,g2)) | |
627 | (setq g2 `(,g2 t)))) | |
628 | (if (charsetp g3) | |
629 | (if (plist-get props 'force-g3-on-output) | |
630 | (setq g3 `(nil ,g3)) | |
631 | (setq g3 `(,g3 t)))) | |
632 | `(,name 2 ,mnemonic ,doc-string | |
633 | (,g0 ,g1 ,g2 ,g3 | |
634 | ,(plist-get props 'short) | |
635 | ,(not (plist-get props 'no-ascii-eol)) | |
636 | ,(not (plist-get props 'no-ascii-cntl)) | |
637 | ,(plist-get props 'seven) | |
638 | t | |
639 | ,(not (plist-get props 'lock-shift)) | |
640 | ,use-roman | |
641 | ,use-oldjis | |
642 | ,(plist-get props 'no-iso6429) | |
643 | nil nil nil nil) | |
644 | ,properties ,eol-type))) | |
645 | ((eq type 'big5) | |
646 | `(,name 3 ,mnemonic ,doc-string () ,properties ,eol-type)) | |
50c29104 | 647 | ((eq type 'ccl) |
f4a012a6 | 648 | `(,name 4 ,mnemonic ,doc-string |
50c29104 | 649 | (,(plist-get props 'decode) . ,(plist-get props 'encode)) |
f4a012a6 | 650 | ,properties ,eol-type)) |
50c29104 | 651 | (t |
f4a012a6 | 652 | (error "unsupported XEmacs style make-coding-style arguments: %S" |
50c29104 KH |
653 | `(,name ,type ,doc-string ,props)))))) |
654 | ||
8057896b | 655 | (defun make-coding-system (coding-system type mnemonic doc-string |
1b46a680 KH |
656 | &optional |
657 | flags | |
658 | properties | |
659 | eol-type) | |
3bb1accb | 660 | "Define a new coding system CODING-SYSTEM (symbol). |
521d4010 | 661 | Remaining arguments are TYPE, MNEMONIC, DOC-STRING, FLAGS (optional), |
d9e3229d | 662 | and PROPERTIES (optional) which construct a coding-spec of CODING-SYSTEM |
a6acd8a2 | 663 | in the following format: |
0269ddfb | 664 | [TYPE MNEMONIC DOC-STRING PLIST FLAGS] |
3bb1accb KH |
665 | |
666 | TYPE is an integer value indicating the type of the coding system as follows: | |
4ed46869 KH |
667 | 0: Emacs internal format, |
668 | 1: Shift-JIS (or MS-Kanji) used mainly on Japanese PC, | |
669 | 2: ISO-2022 including many variants, | |
670 | 3: Big5 used mainly on Chinese PC, | |
cd9c3177 | 671 | 4: private, CCL programs provide encoding/decoding algorithm, |
521d4010 | 672 | 5: Raw-text, which means that text contains random 8-bit codes. |
0269ddfb | 673 | |
3bb1accb | 674 | MNEMONIC is a character to be displayed on mode line for the coding system. |
0269ddfb | 675 | |
3bb1accb | 676 | DOC-STRING is a documentation string for the coding system. |
0269ddfb | 677 | |
3bb1accb | 678 | FLAGS specifies more detailed information of the coding system as follows: |
d6d6d592 | 679 | |
3bb1accb | 680 | If TYPE is 2 (ISO-2022), FLAGS is a list of these elements: |
4ed46869 KH |
681 | CHARSET0, CHARSET1, CHARSET2, CHARSET3, SHORT-FORM, |
682 | ASCII-EOL, ASCII-CNTL, SEVEN, LOCKING-SHIFT, SINGLE-SHIFT, | |
d6d6d592 | 683 | USE-ROMAN, USE-OLDJIS, NO-ISO6429, INIT-BOL, DESIGNATION-BOL, |
850101ed | 684 | SAFE, ACCEPT-LATIN-EXTRA-CODE. |
4ed46869 KH |
685 | CHARSETn are character sets initially designated to Gn graphic registers. |
686 | If CHARSETn is nil, Gn is never used. | |
687 | If CHARSETn is t, Gn can be used but nothing designated initially. | |
688 | If CHARSETn is a list of character sets, those character sets are | |
689 | designated to Gn on output, but nothing designated to Gn initially. | |
421e3b4e | 690 | But, character set `ascii' can be designated only to G0. |
4ed46869 KH |
691 | SHORT-FORM non-nil means use short designation sequence on output. |
692 | ASCII-EOL non-nil means designate ASCII to g0 at end of line on output. | |
693 | ASCII-CNTL non-nil means designate ASCII to g0 before control codes and | |
694 | SPACE on output. | |
695 | SEVEN non-nil means use 7-bit code only on output. | |
696 | LOCKING-SHIFT non-nil means use locking-shift. | |
697 | SINGLE-SHIFT non-nil means use single-shift. | |
698 | USE-ROMAN non-nil means designate JIS0201-1976-Roman instead of ASCII. | |
699 | USE-OLDJIS non-nil means designate JIS0208-1976 instead of JIS0208-1983. | |
700 | NO-ISO6429 non-nil means not use ISO6429's direction specification. | |
69eba008 KH |
701 | INIT-BOL non-nil means any designation state is assumed to be reset |
702 | to initial at each beginning of line on output. | |
703 | DESIGNATION-BOL non-nil means designation sequences should be placed | |
704 | at beginning of line on output. | |
a6acd8a2 | 705 | SAFE non-nil means convert unsafe characters to `?' on output. |
c11a8f77 KH |
706 | Characters not specified in the property `safe-charsets' nor |
707 | `safe-chars' are unsafe. | |
850101ed RS |
708 | ACCEPT-LATIN-EXTRA-CODE non-nil means code-detection routine accepts |
709 | a code specified in `latin-extra-code-table' (which see) as a valid | |
710 | code of the coding system. | |
d6d6d592 | 711 | |
3bb1accb KH |
712 | If TYPE is 4 (private), FLAGS should be a cons of CCL programs, for |
713 | decoding and encoding. CCL programs should be specified by their | |
714 | symbols. | |
d9e3229d | 715 | |
a2852e45 KH |
716 | PROPERTIES is an alist of properties vs the corresponding values. The |
717 | following properties are recognized: | |
718 | ||
719 | o post-read-conversion | |
720 | ||
721 | The value is a function to call after some text is inserted and | |
722 | decoded by the coding system itself and before any functions in | |
521d4010 DL |
723 | `after-insert-functions' are called. The argument of this |
724 | function is the same as for a function in | |
725 | `after-insert-file-functions', i.e. LENGTH of the text inserted, | |
726 | with point at the head of the text to be decoded. | |
a2852e45 KH |
727 | |
728 | o pre-write-conversion | |
729 | ||
730 | The value is a function to call after all functions in | |
731 | `write-region-annotate-functions' and `buffer-file-format' are | |
732 | called, and before the text is encoded by the coding system itself. | |
a284eea3 DL |
733 | The arguments to this function are the same as those of a function |
734 | in `write-region-annotate-functions', i.e. FROM and TO, specifying | |
521d4010 | 735 | a region of text. |
a2852e45 KH |
736 | |
737 | o translation-table-for-decode | |
738 | ||
739 | The value is a translation table to be applied on decoding. See | |
740 | the function `make-translation-table' for the format of translation | |
521d4010 | 741 | table. This is not applicable to type 4 (CCL-based) coding systems. |
a2852e45 KH |
742 | |
743 | o translation-table-for-encode | |
744 | ||
521d4010 DL |
745 | The value is a translation table to be applied on encoding. This is |
746 | not applicable to type 4 (CCL-based) coding systems. | |
a2852e45 KH |
747 | |
748 | o safe-chars | |
749 | ||
750 | The value is a char table. If a character has non-nil value in it, | |
751 | the character is safely supported by the coding system. This | |
752 | overrides the specification of safe-charsets. | |
753 | ||
754 | o safe-charsets | |
521d4010 | 755 | |
a2852e45 KH |
756 | The value is a list of charsets safely supported by the coding |
757 | system. The value t means that all charsets Emacs handles are | |
758 | supported. Even if some charset is not in this list, it doesn't | |
521d4010 DL |
759 | mean that the charset can't be encoded in the coding system; |
760 | it just means that some other receiver of text encoded | |
a2852e45 KH |
761 | in the coding system won't be able to handle that charset. |
762 | ||
763 | o mime-charset | |
764 | ||
765 | The value is a symbol of which name is `MIME-charset' parameter of | |
766 | the coding system. | |
767 | ||
768 | o valid-codes (meaningful only for a coding system based on CCL) | |
769 | ||
770 | The value is a list to indicate valid byte ranges of the encoded | |
771 | file. Each element of the list is an integer or a cons of integer. | |
772 | In the former case, the integer value is a valid byte code. In the | |
773 | latter case, the integers specifies the range of valid byte codes. | |
774 | ||
d9e3229d KH |
775 | These properties are set in PLIST, a property list. This function |
776 | also sets properties `coding-category' and `alias-coding-systems' | |
777 | automatically. | |
4ed46869 | 778 | |
1b46a680 KH |
779 | EOL-TYPE specifies the EOL type of the coding-system in one of the |
780 | following formats: | |
781 | ||
782 | o symbol (unix, dos, or mac) | |
783 | ||
784 | The symbol `unix' means Unix-like EOL (LF), `dos' means | |
785 | DOS-like EOL (CRLF), and `mac' means MAC-like EOL (CR). | |
786 | ||
787 | o number (0, 1, or 2) | |
788 | ||
789 | The number 0, 1, and 2 mean UNIX, DOS, and MAC-like EOL | |
790 | respectively. | |
791 | ||
792 | o vector of coding-systems of length 3 | |
793 | ||
794 | The EOL type is detected automatically for the coding system. | |
795 | And, according to the detected EOL type, one of the coding | |
796 | systems in the vector is selected. Elements of the vector | |
4d3a9228 | 797 | corresponds to Unix-like EOL, DOS-like EOL, and Mac-like EOL |
1b46a680 KH |
798 | in this order. |
799 | ||
3bb1accb KH |
800 | Kludgy features for backward compatibility: |
801 | ||
802 | 1. If TYPE is 4 and car or cdr of FLAGS is a vector, the vector is | |
803 | treated as a compiled CCL code. | |
804 | ||
805 | 2. If PROPERTIES is just a list of character sets, the list is set as | |
806 | a value of `safe-charsets' in PLIST." | |
50c29104 KH |
807 | |
808 | ;; For compatiblity with XEmacs, we check the type of TYPE. If it | |
c3d0ee51 EZ |
809 | ;; is a symbol, perhaps, this function is called with XEmacs-style |
810 | ;; arguments. Here, try to transform that kind of arguments to | |
50c29104 KH |
811 | ;; Emacs style. |
812 | (if (symbolp type) | |
813 | (let ((args (transform-make-coding-system-args coding-system type | |
814 | mnemonic doc-string))) | |
815 | (setq coding-system (car args) | |
1053cc93 | 816 | type (nth 1 args) |
50c29104 KH |
817 | mnemonic (nth 2 args) |
818 | doc-string (nth 3 args) | |
819 | flags (nth 4 args) | |
820 | properties (nth 5 args) | |
821 | eol-type (nth 6 args)))) | |
822 | ||
0269ddfb | 823 | ;; Set a value of `coding-system' property. |
6e9722b0 | 824 | (let ((coding-spec (make-vector 5 nil)) |
d9e3229d KH |
825 | (no-initial-designation t) |
826 | (no-alternative-designation t) | |
e6cddb1a | 827 | (accept-latin-extra-code nil) |
6e9722b0 | 828 | coding-category) |
cd9c3177 | 829 | (if (or (not (integerp type)) (< type 0) (> type 5)) |
0269ddfb | 830 | (error "TYPE argument must be 0..5")) |
8057896b | 831 | (if (or (not (integerp mnemonic)) (<= mnemonic ? ) (> mnemonic 127)) |
521d4010 | 832 | (error "MNEMONIC argument must be an ASCII printable character")) |
0269ddfb KH |
833 | (aset coding-spec coding-spec-type-idx type) |
834 | (aset coding-spec coding-spec-mnemonic-idx mnemonic) | |
835 | (aset coding-spec coding-spec-doc-string-idx | |
e127a722 | 836 | (purecopy (if (stringp doc-string) doc-string ""))) |
6e9722b0 KH |
837 | (cond ((= type 0) |
838 | (setq coding-category 'coding-category-emacs-mule)) | |
839 | ((= type 1) | |
840 | (setq coding-category 'coding-category-sjis)) | |
841 | ((= type 2) ; ISO2022 | |
4ed46869 | 842 | (let ((i 0) |
6e9722b0 | 843 | (vec (make-vector 32 nil)) |
05134257 KH |
844 | (g1-designation nil) |
845 | (fl flags)) | |
4ed46869 | 846 | (while (< i 4) |
05134257 | 847 | (let ((charset (car fl))) |
6e9722b0 KH |
848 | (if (and no-initial-designation |
849 | (> i 0) | |
850 | (or (charsetp charset) | |
851 | (and (consp charset) | |
852 | (charsetp (car charset))))) | |
853 | (setq no-initial-designation nil)) | |
854 | (if (charsetp charset) | |
855 | (if (= i 1) (setq g1-designation charset)) | |
856 | (if (consp charset) | |
857 | (let ((tail charset) | |
858 | elt) | |
859 | (while tail | |
860 | (setq elt (car tail)) | |
d9e3229d KH |
861 | (if (eq elt t) |
862 | (setq no-alternative-designation nil) | |
863 | (if (and elt (not (charsetp elt))) | |
864 | (error "Invalid charset: %s" elt))) | |
6e9722b0 KH |
865 | (setq tail (cdr tail))) |
866 | (setq g1-designation (car charset))) | |
d9e3229d KH |
867 | (if charset |
868 | (if (eq charset t) | |
869 | (setq no-alternative-designation nil) | |
870 | (error "Invalid charset: %s" charset))))) | |
4ed46869 | 871 | (aset vec i charset)) |
05134257 KH |
872 | (setq fl (cdr fl) i (1+ i))) |
873 | (while (and (< i 32) fl) | |
874 | (aset vec i (car fl)) | |
e6cddb1a KH |
875 | (if (and (= i 16) ; ACCEPT-LATIN-EXTRA-CODE |
876 | (car fl)) | |
877 | (setq accept-latin-extra-code t)) | |
05134257 | 878 | (setq fl (cdr fl) i (1+ i))) |
6e9722b0 | 879 | (aset coding-spec 4 vec) |
6e9722b0 KH |
880 | (setq coding-category |
881 | (if (aref vec 8) ; Use locking-shift. | |
dc64cd19 KH |
882 | (or (and (aref vec 7) 'coding-category-iso-7-else) |
883 | 'coding-category-iso-8-else) | |
6e9722b0 KH |
884 | (if (aref vec 7) ; 7-bit only. |
885 | (if (aref vec 9) ; Use single-shift. | |
dc64cd19 | 886 | 'coding-category-iso-7-else |
d9e3229d KH |
887 | (if no-alternative-designation |
888 | 'coding-category-iso-7-tight | |
889 | 'coding-category-iso-7)) | |
3ad911d8 KH |
890 | (if (or no-initial-designation |
891 | (not no-alternative-designation)) | |
dc64cd19 | 892 | 'coding-category-iso-8-else |
6e9722b0 KH |
893 | (if (and (charsetp g1-designation) |
894 | (= (charset-dimension g1-designation) 2)) | |
895 | 'coding-category-iso-8-2 | |
896 | 'coding-category-iso-8-1))))))) | |
897 | ((= type 3) | |
898 | (setq coding-category 'coding-category-big5)) | |
899 | ((= type 4) ; private | |
c76b5c99 | 900 | (setq coding-category 'coding-category-ccl) |
3bb1accb KH |
901 | (if (not (consp flags)) |
902 | (error "Invalid FLAGS argument for TYPE 4 (CCL)") | |
903 | (let ((decoder (check-ccl-program | |
904 | (car flags) | |
905 | (intern (format "%s-decoder" coding-system)))) | |
906 | (encoder (check-ccl-program | |
907 | (cdr flags) | |
908 | (intern (format "%s-encoder" coding-system))))) | |
909 | (if (and decoder encoder) | |
910 | (aset coding-spec 4 (cons decoder encoder)) | |
911 | (error "Invalid FLAGS argument for TYPE 4 (CCL)"))))) | |
cd9c3177 KH |
912 | (t ; i.e. (= type 5) |
913 | (setq coding-category 'coding-category-raw-text))) | |
0269ddfb KH |
914 | |
915 | (let ((plist (list 'coding-category coding-category | |
d9e3229d | 916 | 'alias-coding-systems (list coding-system)))) |
0269ddfb | 917 | (if no-initial-designation |
d9e3229d KH |
918 | (plist-put plist 'no-initial-designation t)) |
919 | (if (and properties | |
920 | (or (eq properties t) | |
921 | (not (consp (car properties))))) | |
922 | ;; In the old version, the arg PROPERTIES is a list to be | |
923 | ;; set in PLIST as a value of property `safe-charsets'. | |
c11a8f77 KH |
924 | (setq properties (list (cons 'safe-charsets properties)))) |
925 | ;; In the current version PROPERTIES is a property list. | |
926 | ;; Reflect it into PLIST one by one while handling safe-chars | |
927 | ;; specially. | |
928 | (let ((safe-charsets (cdr (assq 'safe-charsets properties))) | |
929 | (safe-chars (cdr (assq 'safe-chars properties))) | |
930 | (l properties) | |
931 | prop val) | |
932 | ;; If only safe-charsets is specified, make a char-table from | |
933 | ;; it, and store that char-table as the value of `safe-chars'. | |
934 | (if (and (not safe-chars) safe-charsets) | |
935 | (let (charset) | |
936 | (if (eq safe-charsets t) | |
937 | (setq safe-chars t) | |
938 | (setq safe-chars (make-char-table 'safe-chars)) | |
939 | (while safe-charsets | |
940 | (setq charset (car safe-charsets) | |
941 | safe-charsets (cdr safe-charsets)) | |
942 | (cond ((eq charset 'ascii)) ; just ignore | |
943 | ((eq charset 'eight-bit-control) | |
944 | (let ((i 128)) | |
945 | (while (< i 160) | |
946 | (aset safe-chars i t) | |
947 | (setq i (1+ i))))) | |
948 | ((eq charset 'eight-bit-graphic) | |
949 | (let ((i 160)) | |
950 | (while (< i 256) | |
951 | (aset safe-chars i t) | |
952 | (setq i (1+ i))))) | |
953 | (t | |
e6cddb1a KH |
954 | (aset safe-chars (make-char charset) t)))) |
955 | (if accept-latin-extra-code | |
956 | (let ((i 128)) | |
957 | (while (< i 160) | |
958 | (if (aref latin-extra-code-table i) | |
959 | (aset safe-chars i t)) | |
960 | (setq i (1+ i)))))) | |
c11a8f77 KH |
961 | (setq l (cons (cons 'safe-chars safe-chars) l)))) |
962 | (while l | |
963 | (setq prop (car (car l)) val (cdr (car l)) l (cdr l)) | |
964 | (if (eq prop 'safe-chars) | |
965 | (progn | |
cc57cc54 KH |
966 | (if (and (symbolp val) |
967 | (get val 'translation-table)) | |
968 | (setq safe-chars (get val 'translation-table))) | |
969 | (register-char-codings coding-system safe-chars) | |
970 | (setq val safe-chars))) | |
c11a8f77 | 971 | (plist-put plist prop val))) |
1b46a680 KH |
972 | ;; The property `coding-category' may have been set differently |
973 | ;; through PROPERTIES. | |
974 | (setq coding-category (plist-get plist 'coding-category)) | |
0269ddfb | 975 | (aset coding-spec coding-spec-plist-idx plist)) |
6e9722b0 | 976 | (put coding-system 'coding-system coding-spec) |
6e9722b0 KH |
977 | (put coding-category 'coding-systems |
978 | (cons coding-system (get coding-category 'coding-systems)))) | |
4ed46869 | 979 | |
1b46a680 | 980 | ;; Next, set a value of `eol-type' property. |
af873cd1 | 981 | (if (not eol-type) |
1b46a680 KH |
982 | ;; If EOL-TYPE is nil, set a vector of subsidiary coding |
983 | ;; systems, each corresponds to a coding system for the detected | |
984 | ;; EOL format. | |
985 | (setq eol-type (make-subsidiary-coding-system coding-system))) | |
986 | (setq eol-type | |
987 | (cond ((or (eq eol-type 'unix) (null eol-type)) | |
988 | 0) | |
989 | ((eq eol-type 'dos) | |
990 | 1) | |
991 | ((eq eol-type 'mac) | |
992 | 2) | |
993 | ((or (and (vectorp eol-type) | |
994 | (= (length eol-type) 3)) | |
995 | (and (numberp eol-type) | |
996 | (and (>= eol-type 0) | |
997 | (<= eol-type 2)))) | |
998 | eol-type) | |
999 | (t | |
1000 | (error "Invalid EOL-TYPE spec:%S" eol-type)))) | |
1001 | (put coding-system 'eol-type eol-type) | |
0269ddfb KH |
1002 | |
1003 | ;; At last, register CODING-SYSTEM in `coding-system-list' and | |
1004 | ;; `coding-system-alist'. | |
857ea15c | 1005 | (add-to-coding-system-list coding-system) |
0269ddfb | 1006 | (setq coding-system-alist (cons (list (symbol-name coding-system)) |
d9e3229d | 1007 | coding-system-alist)) |
05134257 KH |
1008 | |
1009 | ;; For a coding system of cateogory iso-8-1 and iso-8-2, create | |
1010 | ;; XXX-with-esc variants. | |
1011 | (let ((coding-category (coding-system-category coding-system))) | |
1012 | (if (or (eq coding-category 'coding-category-iso-8-1) | |
1013 | (eq coding-category 'coding-category-iso-8-2)) | |
1014 | (let ((esc (intern (concat (symbol-name coding-system) "-with-esc"))) | |
c11a8f77 KH |
1015 | (doc (format "Same as %s but can handle any charsets by ISO's escape sequences." coding-system)) |
1016 | (safe-charsets (assq 'safe-charsets properties)) | |
1017 | (mime-charset (assq 'mime-charset properties))) | |
1018 | (if safe-charsets | |
1019 | (setcdr safe-charsets t) | |
1020 | (setq properties (cons (cons 'safe-charsets t) properties))) | |
1021 | (if mime-charset | |
1022 | (setcdr mime-charset nil)) | |
05134257 KH |
1023 | (make-coding-system esc type mnemonic doc |
1024 | (if (listp (car flags)) | |
1025 | (cons (append (car flags) '(t)) (cdr flags)) | |
1026 | (cons (list (car flags) t) (cdr flags))) | |
c11a8f77 | 1027 | properties)))) |
05134257 | 1028 | |
d9e3229d | 1029 | coding-system) |
8057896b | 1030 | |
a42763dc | 1031 | (defun define-coding-system-alias (alias coding-system) |
358d28fb | 1032 | "Define ALIAS as an alias for coding system CODING-SYSTEM." |
0269ddfb KH |
1033 | (put alias 'coding-system (coding-system-spec coding-system)) |
1034 | (nconc (coding-system-get alias 'alias-coding-systems) (list alias)) | |
857ea15c | 1035 | (add-to-coding-system-list alias) |
0269ddfb KH |
1036 | (setq coding-system-alist (cons (list (symbol-name alias)) |
1037 | coding-system-alist)) | |
1038 | (let ((eol-type (coding-system-eol-type coding-system))) | |
1039 | (if (vectorp eol-type) | |
1040 | (put alias 'eol-type (make-subsidiary-coding-system alias)) | |
1041 | (put alias 'eol-type eol-type)))) | |
4ed46869 KH |
1042 | |
1043 | (defun set-buffer-file-coding-system (coding-system &optional force) | |
358d28fb RS |
1044 | "Set the file coding-system of the current buffer to CODING-SYSTEM. |
1045 | This means that when you save the buffer, it will be converted | |
1046 | according to CODING-SYSTEM. For a list of possible values of CODING-SYSTEM, | |
1047 | use \\[list-coding-systems]. | |
1048 | ||
1049 | If the buffer's previous file coding-system value specifies end-of-line | |
1050 | conversion, and CODING-SYSTEM does not specify one, CODING-SYSTEM is | |
1051 | merged with the already-specified end-of-line conversion. | |
b839fdcc KH |
1052 | |
1053 | If the buffer's previous file coding-system value specifies text | |
1054 | conversion, and CODING-SYSTEM does not specify one, CODING-SYSTEM is | |
1055 | merged with the already-specified text conversion. | |
1056 | ||
1057 | However, if the optional prefix argument FORCE is non-nil, then | |
1058 | CODING-SYSTEM is used exactly as specified. | |
aeef8f07 KH |
1059 | |
1060 | This marks the buffer modified so that the succeeding \\[save-buffer] | |
1061 | surely saves the buffer with CODING-SYSTEM. From a program, if you | |
1062 | don't want to mark the buffer modified, just set the variable | |
1063 | `buffer-file-coding-system' directly." | |
d9e3229d | 1064 | (interactive "zCoding system for visited file (default, nil): \nP") |
4ed46869 | 1065 | (check-coding-system coding-system) |
36d455c4 | 1066 | (if (and coding-system buffer-file-coding-system (null force)) |
8dd735c1 KH |
1067 | (let ((base (coding-system-base buffer-file-coding-system)) |
1068 | (eol (coding-system-eol-type buffer-file-coding-system))) | |
1069 | ;; If CODING-SYSTEM doesn't specify text conversion, merge | |
1070 | ;; with that of buffer-file-coding-system. | |
1071 | (if (eq (coding-system-base coding-system) 'undecided) | |
1072 | (setq coding-system (coding-system-change-text-conversion | |
1073 | coding-system base))) | |
1074 | ;; If CODING-SYSTEM doesn't specify eol conversion, merge with | |
1075 | ;; that of buffer-file-coding-system. | |
1076 | (if (and (vectorp (coding-system-eol-type coding-system)) | |
1077 | (numberp eol) (>= eol 0) (<= eol 2)) | |
1078 | (setq coding-system (coding-system-change-eol-conversion | |
1079 | coding-system eol))))) | |
4ed46869 KH |
1080 | (setq buffer-file-coding-system coding-system) |
1081 | (set-buffer-modified-p t) | |
1082 | (force-mode-line-update)) | |
1083 | ||
358d28fb RS |
1084 | (defvar default-terminal-coding-system nil |
1085 | "Default value for the terminal coding system. | |
1086 | This is normally set according to the selected language environment. | |
1087 | See also the command `set-terminal-coding-system'.") | |
1088 | ||
df100398 KH |
1089 | (defun set-terminal-coding-system (coding-system) |
1090 | "Set coding system of your terminal to CODING-SYSTEM. | |
358d28fb RS |
1091 | All text output to the terminal will be encoded |
1092 | with the specified coding system. | |
1093 | For a list of possible values of CODING-SYSTEM, use \\[list-coding-systems]. | |
1094 | The default is determined by the selected language environment | |
1095 | or by the previous use of this command." | |
1096 | (interactive | |
2e02a76f RS |
1097 | (list (let ((default (if (and (not (terminal-coding-system)) |
1098 | default-terminal-coding-system) | |
1099 | default-terminal-coding-system))) | |
1100 | (read-coding-system | |
1101 | (format "Coding system for terminal display (default, %s): " | |
1102 | default) | |
1103 | default)))) | |
358d28fb RS |
1104 | (if (and (not coding-system) |
1105 | (not (terminal-coding-system))) | |
1106 | (setq coding-system default-terminal-coding-system)) | |
1107 | (if coding-system | |
521d4010 | 1108 | (setq default-terminal-coding-system coding-system)) |
df100398 KH |
1109 | (set-terminal-coding-system-internal coding-system) |
1110 | (redraw-frame (selected-frame))) | |
1111 | ||
358d28fb RS |
1112 | (defvar default-keyboard-coding-system nil |
1113 | "Default value of the keyboard coding system. | |
1114 | This is normally set according to the selected language environment. | |
1115 | See also the command `set-keyboard-coding-system'.") | |
1116 | ||
df100398 | 1117 | (defun set-keyboard-coding-system (coding-system) |
358d28fb RS |
1118 | "Set coding system for keyboard input to CODING-SYSTEM. |
1119 | In addition, this command enables Encoded-kbd minor mode. | |
6d34f495 DL |
1120 | \(If CODING-SYSTEM is nil, Encoded-kbd mode is turned off -- see |
1121 | `encoded-kbd-mode'.) | |
358d28fb RS |
1122 | For a list of possible values of CODING-SYSTEM, use \\[list-coding-systems]. |
1123 | The default is determined by the selected language environment | |
1124 | or by the previous use of this command." | |
1125 | (interactive | |
2e02a76f RS |
1126 | (list (let ((default (if (and (not (keyboard-coding-system)) |
1127 | default-keyboard-coding-system) | |
1128 | default-keyboard-coding-system))) | |
1129 | (read-coding-system | |
1130 | (format "Coding system for keyboard input (default, %s): " | |
1131 | default) | |
1132 | default)))) | |
358d28fb RS |
1133 | (if (and (not coding-system) |
1134 | (not (keyboard-coding-system))) | |
1135 | (setq coding-system default-keyboard-coding-system)) | |
1136 | (if coding-system | |
1137 | (setq default-keyboard-coding-system coding-system)) | |
df100398 | 1138 | (set-keyboard-coding-system-internal coding-system) |
b23bad0b | 1139 | (setq keyboard-coding-system coding-system) |
df100398 KH |
1140 | (encoded-kbd-mode (if coding-system 1 0))) |
1141 | ||
6d34f495 DL |
1142 | (defcustom keyboard-coding-system nil |
1143 | "Specify coding system for keyboard input. | |
1144 | If you set this on a terminal which can't distinguish Meta keys from | |
1145 | 8-bit characters, you will have to use ESC to type Meta characters. | |
1146 | See Info node `Specify Coding' and Info node `Single-Byte Character Support'. | |
1147 | ||
1148 | Setting this variable directly does not take effect; | |
1149 | use either M-x customize or \\[set-keyboard-coding-system]." | |
1150 | :type '(coding-system :tag "Coding system") | |
1151 | :link '(info-link "(emacs)Specify Coding") | |
1152 | :link '(info-link "(emacs)Single-Byte Character Support") | |
1153 | :set (lambda (symbol value) | |
1154 | ;; Don't load encoded-kbd-mode unnecessarily. | |
1155 | (if (or value (boundp 'encoded-kbd-mode)) | |
1156 | (set-keyboard-coding-system value) | |
1157 | (set-default 'keyboard-coding-system nil))) ; must initialize | |
1158 | :version "21.1" | |
1159 | :group 'keyboard | |
1160 | :group 'mule) | |
1161 | ||
df100398 | 1162 | (defun set-buffer-process-coding-system (decoding encoding) |
358d28fb | 1163 | "Set coding systems for the process associated with the current buffer. |
df100398 | 1164 | DECODING is the coding system to be used to decode input from the process, |
358d28fb RS |
1165 | ENCODING is the coding system to be used to encode output to the process. |
1166 | ||
1167 | For a list of possible values of CODING-SYSTEM, use \\[list-coding-systems]." | |
4ed46869 | 1168 | (interactive |
83911021 | 1169 | "zCoding-system for output from the process: \nzCoding-system for input to the process: ") |
4ed46869 KH |
1170 | (let ((proc (get-buffer-process (current-buffer)))) |
1171 | (if (null proc) | |
521d4010 | 1172 | (error "No process") |
df100398 KH |
1173 | (check-coding-system decoding) |
1174 | (check-coding-system encoding) | |
1175 | (set-process-coding-system proc decoding encoding))) | |
4ed46869 KH |
1176 | (force-mode-line-update)) |
1177 | ||
d0b99881 RS |
1178 | (defalias 'set-clipboard-coding-system 'set-selection-coding-system) |
1179 | ||
14915c37 | 1180 | (defun set-selection-coding-system (coding-system) |
b25eef20 KH |
1181 | "Make CODING-SYSTEM used for communicating with other X clients . |
1182 | When sending or receiving text via cut_buffer, selection, and clipboard, | |
1183 | the text is encoded or decoded by CODING-SYSTEM." | |
a03b3ce1 | 1184 | (interactive "zCoding system for X selection: ") |
b25eef20 | 1185 | (check-coding-system coding-system) |
14915c37 | 1186 | (setq selection-coding-system coding-system)) |
b25eef20 | 1187 | |
e8dd0160 | 1188 | ;; Coding system lastly specified by the command |
a03b3ce1 KH |
1189 | ;; set-next-selection-coding-system. |
1190 | (defvar last-next-selection-coding-system nil) | |
1191 | ||
1192 | (defun set-next-selection-coding-system (coding-system) | |
1193 | "Make CODING-SYSTEM used for the next communication with other X clients. | |
1194 | This setting is effective for the next communication only." | |
1195 | (interactive | |
1196 | (list (read-coding-system | |
1197 | (if last-next-selection-coding-system | |
1198 | (format "Coding system for the next X selection (default, %S): " | |
1199 | last-next-selection-coding-system) | |
1200 | "Coding system for the next X selection: ") | |
1201 | last-next-selection-coding-system))) | |
1202 | (if coding-system | |
1203 | (setq last-next-selection-coding-system coding-system) | |
1204 | (setq coding-system last-next-selection-coding-system)) | |
1205 | (check-coding-system coding-system) | |
1206 | ||
1207 | (setq next-selection-coding-system coding-system)) | |
1208 | ||
4ed46869 | 1209 | (defun set-coding-priority (arg) |
521d4010 DL |
1210 | "Set priority of coding categories according to ARG. |
1211 | ARG is a list of coding categories ordered by priority." | |
d9e3229d KH |
1212 | (let ((l arg) |
1213 | (current-list (copy-sequence coding-category-list))) | |
e8dd0160 | 1214 | ;; Check the validity of ARG while deleting coding categories in |
d9e3229d KH |
1215 | ;; ARG from CURRENT-LIST. We assume that CODING-CATEGORY-LIST |
1216 | ;; contains all coding categories. | |
1217 | (while l | |
1218 | (if (or (null (get (car l) 'coding-category-index)) | |
1219 | (null (memq (car l) current-list))) | |
1220 | (error "Invalid or duplicated element in argument: %s" arg)) | |
1221 | (setq current-list (delq (car l) current-list)) | |
1222 | (setq l (cdr l))) | |
4ed46869 | 1223 | ;; Update `coding-category-list' and return it. |
2feaf204 KH |
1224 | (setq coding-category-list (append arg current-list)) |
1225 | (set-coding-priority-internal))) | |
4ed46869 KH |
1226 | |
1227 | ;;; FILE I/O | |
1228 | ||
e76938e7 | 1229 | (defcustom auto-coding-alist |
0735296c | 1230 | '(("\\.\\(arc\\|zip\\|lzh\\|zoo\\|jar\\|tar\\|tgz\\)\\'" . no-conversion) |
4f16d1d1 | 1231 | ("\\.\\(gz\\|Z\\|bz\\|bz2\\|gpg\\)\\'" . no-conversion)) |
835f49b8 KH |
1232 | "Alist of filename patterns vs corresponding coding systems. |
1233 | Each element looks like (REGEXP . CODING-SYSTEM). | |
558b0c86 | 1234 | A file whose name matches REGEXP is decoded by CODING-SYSTEM on reading. |
835f49b8 | 1235 | |
7fed493a RS |
1236 | The settings in this alist take priority over `coding:' tags |
1237 | in the file (see the function `set-auto-coding') | |
e76938e7 DL |
1238 | and the contents of `file-coding-system-alist'." |
1239 | :group 'files | |
1240 | :group 'mule | |
1241 | :type '(repeat (cons (regexp :tag "File name regexp") | |
1242 | (symbol :tag "Coding system")))) | |
835f49b8 | 1243 | |
502522b2 GM |
1244 | (defcustom auto-coding-regexp-alist |
1245 | '(("^BABYL OPTIONS:[ \t]*-\\*-[ \t]*rmail[ \t]*-\\*-" . no-conversion)) | |
1246 | "Alist of patterns vs corresponding coding systems. | |
1247 | Each element looks like (REGEXP . CODING-SYSTEM). | |
1248 | A file whose first bytes match REGEXP is decoded by CODING-SYSTEM on reading. | |
1249 | ||
1250 | The settings in this alist take priority over `coding:' tags | |
1251 | in the file (see the function `set-auto-coding') | |
1252 | and the contents of `file-coding-system-alist'." | |
1253 | :group 'files | |
1254 | :group 'mule | |
1255 | :type '(repeat (cons (regexp :tag "Regexp") | |
1256 | (symbol :tag "Coding system")))) | |
1257 | ||
1c4cc63a KH |
1258 | (defvar set-auto-coding-for-load nil |
1259 | "Non-nil means look for `load-coding' property instead of `coding'. | |
1260 | This is used for loading and byte-compiling Emacs Lisp files.") | |
1261 | ||
8a592131 RS |
1262 | (defun auto-coding-alist-lookup (filename) |
1263 | "Return the coding system specified by `auto-coding-alist' for FILENAME." | |
1264 | (let ((alist auto-coding-alist) | |
ca128d75 | 1265 | (case-fold-search (memq system-type '(vax-vms windows-nt ms-dos))) |
8a592131 RS |
1266 | coding-system) |
1267 | (while (and alist (not coding-system)) | |
1268 | (if (string-match (car (car alist)) filename) | |
1269 | (setq coding-system (cdr (car alist))) | |
1270 | (setq alist (cdr alist)))) | |
1271 | coding-system)) | |
1272 | ||
502522b2 GM |
1273 | |
1274 | (defun auto-coding-from-file-contents (size) | |
1275 | "Determine a coding system from the contents of the current buffer. | |
1276 | The current buffer contains SIZE bytes starting at point. | |
1277 | Value is either a coding system or nil." | |
1278 | (save-excursion | |
1279 | (let ((alist auto-coding-regexp-alist) | |
1280 | coding-system) | |
1281 | (while (and alist (not coding-system)) | |
1282 | (let ((regexp (car (car alist)))) | |
1283 | (when (re-search-forward regexp (+ (point) size) t) | |
1284 | (setq coding-system (cdr (car alist))))) | |
1285 | (setq alist (cdr alist))) | |
1286 | coding-system))) | |
1287 | ||
1288 | ||
835f49b8 KH |
1289 | (defun set-auto-coding (filename size) |
1290 | "Return coding system for a file FILENAME of which SIZE bytes follow point. | |
1c4cc63a KH |
1291 | These bytes should include at least the first 1k of the file |
1292 | and the last 3k of the file, but the middle may be omitted. | |
63561304 | 1293 | |
502522b2 GM |
1294 | It checks FILENAME against the variable `auto-coding-alist'. If |
1295 | FILENAME doesn't match any entries in the variable, it checks the | |
1296 | contents of the current buffer following point against | |
1297 | `auto-coding-regexp-alist'. If no match is found, it checks for a | |
1298 | `coding:' tag in the first one or two lines following point. If no | |
1299 | `coding:' tag is found, it checks for local variables list in the last | |
1300 | 3K bytes out of the SIZE bytes. | |
63561304 KH |
1301 | |
1302 | The return value is the specified coding system, | |
1303 | or nil if nothing specified. | |
87aba788 | 1304 | |
ba74e833 | 1305 | The variable `set-auto-coding-function' (which see) is set to this |
87aba788 | 1306 | function by default." |
502522b2 GM |
1307 | (or (auto-coding-alist-lookup filename) |
1308 | (auto-coding-from-file-contents size) | |
1309 | (let* ((case-fold-search t) | |
1310 | (head-start (point)) | |
1311 | (head-end (+ head-start (min size 1024))) | |
1312 | (tail-start (+ head-start (max (- size 3072) 0))) | |
1313 | (tail-end (+ head-start size)) | |
1314 | coding-system head-found tail-found pos) | |
1315 | ;; Try a short cut by searching for the string "coding:" | |
1316 | ;; and for "unibyte:" at the head and tail of SIZE bytes. | |
1317 | (setq head-found (or (search-forward "coding:" head-end t) | |
1318 | (search-forward "unibyte:" head-end t))) | |
1319 | (if (and head-found (> head-found tail-start)) | |
1320 | ;; Head and tail are overlapped. | |
1321 | (setq tail-found head-found) | |
1322 | (goto-char tail-start) | |
1323 | (setq tail-found (or (search-forward "coding:" tail-end t) | |
1324 | (search-forward "unibyte:" tail-end t)))) | |
1325 | ||
1326 | ;; At first check the head. | |
1327 | (when head-found | |
1328 | (goto-char head-start) | |
1329 | (setq pos (re-search-forward "[\n\r]" head-end t)) | |
1330 | (if (and pos | |
1331 | (= (char-after head-start) ?#) | |
1332 | (= (char-after (1+ head-start)) ?!)) | |
1333 | ;; If the file begins with "#!" (exec interpreter magic), | |
1334 | ;; look for coding frobs in the first two lines. You cannot | |
1335 | ;; necessarily put them in the first line of such a file | |
1336 | ;; without screwing up the interpreter invocation. | |
1337 | (setq pos (search-forward "\n" head-end t))) | |
1338 | (if pos (setq head-end pos)) | |
1339 | (when (< head-found head-end) | |
835f49b8 | 1340 | (goto-char head-start) |
502522b2 GM |
1341 | (when (and set-auto-coding-for-load |
1342 | (re-search-forward | |
1343 | "-\\*-\\(.*;\\)?[ \t]*unibyte:[ \t]*\\([^ ;]+\\)" | |
1344 | head-end t)) | |
1345 | (setq coding-system 'raw-text)) | |
1346 | (when (and (not coding-system) | |
1347 | (re-search-forward | |
1348 | "-\\*-\\(.*;\\)?[ \t]*coding:[ \t]*\\([^ ;]+\\)" | |
1349 | head-end t)) | |
1350 | (setq coding-system (intern (match-string 2))) | |
1351 | (or (coding-system-p coding-system) | |
1352 | (setq coding-system nil))))) | |
1353 | ||
1354 | ;; If no coding: tag in the head, check the tail. | |
1355 | (when (and tail-found (not coding-system)) | |
1356 | (goto-char tail-start) | |
1357 | (search-forward "\n\^L" nil t) | |
1358 | (if (re-search-forward | |
1359 | "^\\(.*\\)[ \t]*Local Variables:[ \t]*\\(.*\\)$" tail-end t) | |
1360 | ;; The prefix is what comes before "local variables:" in its | |
1361 | ;; line. The suffix is what comes after "local variables:" | |
1362 | ;; in its line. | |
1363 | (let* ((prefix (regexp-quote (match-string 1))) | |
1364 | (suffix (regexp-quote (match-string 2))) | |
1365 | (re-coding | |
1366 | (concat | |
1367 | "^" prefix | |
cfe98f50 GM |
1368 | ;; N.B. without the \n below, the regexp can |
1369 | ;; eat newlines. | |
1370 | "[ \t]*coding[ \t]*:[ \t]*\\([^ \t\n]+\\)[ \t]*" | |
502522b2 GM |
1371 | suffix "$")) |
1372 | (re-unibyte | |
1373 | (concat | |
1374 | "^" prefix | |
cfe98f50 | 1375 | "[ \t]*unibyte[ \t]*:[ \t]*\\([^ \t\n]+\\)[ \t]*" |
502522b2 GM |
1376 | suffix "$")) |
1377 | (re-end | |
cfe98f50 | 1378 | (concat "^" prefix "[ \t]*End *:[ \t]*" suffix "$")) |
502522b2 GM |
1379 | (pos (point))) |
1380 | (re-search-forward re-end tail-end 'move) | |
1381 | (setq tail-end (point)) | |
1382 | (goto-char pos) | |
1383 | (when (and set-auto-coding-for-load | |
1384 | (re-search-forward re-unibyte tail-end t)) | |
1385 | (setq coding-system 'raw-text)) | |
1386 | (when (and (not coding-system) | |
1387 | (re-search-forward re-coding tail-end t)) | |
1388 | (setq coding-system (intern (match-string 1))) | |
1389 | (or (coding-system-p coding-system) | |
1390 | (setq coding-system nil)))))) | |
1391 | coding-system))) | |
63561304 KH |
1392 | |
1393 | (setq set-auto-coding-function 'set-auto-coding) | |
87aba788 | 1394 | |
4ed46869 | 1395 | (defun after-insert-file-set-buffer-file-coding-system (inserted) |
521d4010 | 1396 | "Set `buffer-file-coding-system' of current buffer after text is inserted." |
4ed46869 KH |
1397 | (if last-coding-system-used |
1398 | (let ((coding-system | |
1399 | (find-new-buffer-file-coding-system last-coding-system-used)) | |
1400 | (modified-p (buffer-modified-p))) | |
0269ddfb | 1401 | (when coding-system |
71983219 | 1402 | (set-buffer-file-coding-system coding-system t) |
d0c26c63 KH |
1403 | (if (and enable-multibyte-characters |
1404 | (or (eq coding-system 'no-conversion) | |
ccb77b4e | 1405 | (eq (coding-system-type coding-system) 5)) |
136e48e4 KH |
1406 | ;; If buffer was unmodified and the size is the |
1407 | ;; same as INSERTED, we must be visiting it. | |
1408 | (not modified-p) | |
1409 | (= (buffer-size) inserted)) | |
ccb77b4e RS |
1410 | ;; For coding systems no-conversion and raw-text..., |
1411 | ;; edit the buffer as unibyte. | |
d0c26c63 KH |
1412 | (let ((pos-byte (position-bytes (+ (point) inserted)))) |
1413 | (set-buffer-multibyte nil) | |
1414 | (setq inserted (- pos-byte (position-bytes (point)))))) | |
0269ddfb | 1415 | (set-buffer-modified-p modified-p)))) |
d0c26c63 | 1416 | inserted) |
4ed46869 | 1417 | |
84c9d215 KH |
1418 | (add-hook 'after-insert-file-functions |
1419 | 'after-insert-file-set-buffer-file-coding-system) | |
4ed46869 | 1420 | |
8057896b | 1421 | ;; The coding-spec and eol-type of coding-system returned is decided |
4ed46869 KH |
1422 | ;; independently in the following order. |
1423 | ;; 1. That of buffer-file-coding-system locally bound. | |
1424 | ;; 2. That of CODING. | |
1425 | ||
1426 | (defun find-new-buffer-file-coding-system (coding) | |
1427 | "Return a coding system for a buffer when a file of CODING is inserted. | |
a73a8c89 KH |
1428 | The local variable `buffer-file-coding-system' of the current buffer |
1429 | is set to the returned value. | |
509064c5 | 1430 | Return nil if there's no need to set `buffer-file-coding-system'." |
4ed46869 | 1431 | (let (local-coding local-eol |
b685f8d6 | 1432 | found-coding found-eol |
4ed46869 KH |
1433 | new-coding new-eol) |
1434 | (if (null coding) | |
1435 | ;; Nothing found about coding. | |
1436 | nil | |
1437 | ||
b685f8d6 RS |
1438 | ;; Get information of `buffer-file-coding-system' in LOCAL-EOL |
1439 | ;; and LOCAL-CODING. | |
1440 | (setq local-eol (coding-system-eol-type buffer-file-coding-system)) | |
1441 | (if (null (numberp local-eol)) | |
1442 | ;; But eol-type is not yet set. | |
1443 | (setq local-eol nil)) | |
0269ddfb KH |
1444 | (if (and buffer-file-coding-system |
1445 | (not (eq (coding-system-type buffer-file-coding-system) t))) | |
1446 | ;; This is not `undecided'. | |
1447 | (setq local-coding (coding-system-base buffer-file-coding-system))) | |
b685f8d6 RS |
1448 | |
1449 | (if (and (local-variable-p 'buffer-file-coding-system) | |
1450 | local-eol local-coding) | |
4ed46869 KH |
1451 | ;; The current buffer has already set full coding-system, we |
1452 | ;; had better not change it. | |
1453 | nil | |
1454 | ||
8057896b | 1455 | (setq found-eol (coding-system-eol-type coding)) |
4ed46869 | 1456 | (if (null (numberp found-eol)) |
be02cd54 EZ |
1457 | ;; But eol-type is not found. |
1458 | ;; If EOL conversions are inhibited, force unix eol-type. | |
1459 | (setq found-eol (if inhibit-eol-conversion 0))) | |
c76b5c99 KH |
1460 | (if (eq (coding-system-type coding) t) |
1461 | (setq found-coding 'undecided) | |
1462 | (setq found-coding (coding-system-base coding))) | |
1463 | ||
1464 | (if (and (not found-eol) (eq found-coding 'undecided)) | |
1465 | ;; No valid coding information found. | |
1466 | nil | |
1467 | ||
1468 | ;; Some coding information (eol or text) found. | |
1469 | ||
1470 | ;; The local setting takes precedence over the found one. | |
1471 | (setq new-coding (if (local-variable-p 'buffer-file-coding-system) | |
1472 | (or local-coding found-coding) | |
1473 | (or found-coding local-coding))) | |
1474 | (setq new-eol (if (local-variable-p 'buffer-file-coding-system) | |
1475 | (or local-eol found-eol) | |
1476 | (or found-eol local-eol))) | |
1477 | ||
1478 | (let ((eol-type (coding-system-eol-type new-coding))) | |
1479 | (if (and (numberp new-eol) (vectorp eol-type)) | |
1480 | (aref eol-type new-eol) | |
1481 | new-coding))))))) | |
4ed46869 | 1482 | |
fe831d33 GV |
1483 | (defun modify-coding-system-alist (target-type regexp coding-system) |
1484 | "Modify one of look up tables for finding a coding system on I/O operation. | |
8c453b46 RS |
1485 | There are three of such tables, `file-coding-system-alist', |
1486 | `process-coding-system-alist', and `network-coding-system-alist'. | |
fe831d33 GV |
1487 | |
1488 | TARGET-TYPE specifies which of them to modify. | |
8c453b46 RS |
1489 | If it is `file', it affects `file-coding-system-alist' (which see). |
1490 | If it is `process', it affects `process-coding-system-alist' (which see). | |
e8dd0160 | 1491 | If it is `network', it affects `network-coding-system-alist' (which see). |
fe831d33 GV |
1492 | |
1493 | REGEXP is a regular expression matching a target of I/O operation. | |
1494 | The target is a file name if TARGET-TYPE is `file', a program name if | |
1495 | TARGET-TYPE is `process', or a network service name or a port number | |
1496 | to connect to if TARGET-TYPE is `network'. | |
1497 | ||
1498 | CODING-SYSTEM is a coding system to perform code conversion on the I/O | |
8c453b46 RS |
1499 | operation, or a cons cell (DECODING . ENCODING) specifying the coding systems |
1500 | for decoding and encoding respectively, | |
1501 | or a function symbol which, when called, returns such a cons cell." | |
fe831d33 GV |
1502 | (or (memq target-type '(file process network)) |
1503 | (error "Invalid target type: %s" target-type)) | |
1504 | (or (stringp regexp) | |
1505 | (and (eq target-type 'network) (integerp regexp)) | |
1506 | (error "Invalid regular expression: %s" regexp)) | |
1507 | (if (symbolp coding-system) | |
1508 | (if (not (fboundp coding-system)) | |
1509 | (progn | |
1510 | (check-coding-system coding-system) | |
1511 | (setq coding-system (cons coding-system coding-system)))) | |
1512 | (check-coding-system (car coding-system)) | |
1513 | (check-coding-system (cdr coding-system))) | |
1514 | (cond ((eq target-type 'file) | |
1515 | (let ((slot (assoc regexp file-coding-system-alist))) | |
1516 | (if slot | |
1517 | (setcdr slot coding-system) | |
1518 | (setq file-coding-system-alist | |
1519 | (cons (cons regexp coding-system) | |
1520 | file-coding-system-alist))))) | |
1521 | ((eq target-type 'process) | |
1522 | (let ((slot (assoc regexp process-coding-system-alist))) | |
1523 | (if slot | |
1524 | (setcdr slot coding-system) | |
1525 | (setq process-coding-system-alist | |
1526 | (cons (cons regexp coding-system) | |
1527 | process-coding-system-alist))))) | |
1528 | (t | |
1529 | (let ((slot (assoc regexp network-coding-system-alist))) | |
1530 | (if slot | |
1531 | (setcdr slot coding-system) | |
1532 | (setq network-coding-system-alist | |
1533 | (cons (cons regexp coding-system) | |
1534 | network-coding-system-alist))))))) | |
1535 | ||
b25eef20 | 1536 | (defun make-translation-table (&rest args) |
a284eea3 | 1537 | "Make a translation table from arguments. |
d38b07f9 | 1538 | A translation table is a char table intended for character |
a284eea3 DL |
1539 | translation in CCL programs. |
1540 | ||
d38b07f9 | 1541 | Each argument is a list of elements of the form (FROM . TO), where FROM |
a284eea3 | 1542 | is a character to be translated to TO. |
13d5617d | 1543 | |
452fdb31 | 1544 | FROM can be a generic character (see `make-char'). In this case, TO is |
d38b07f9 | 1545 | a generic character containing the same number of characters, or an |
452fdb31 | 1546 | ordinary character. If FROM and TO are both generic characters, all |
b25eef20 | 1547 | characters belonging to FROM are translated to characters belonging to TO |
4e003d37 KH |
1548 | without changing their position code(s). |
1549 | ||
1550 | The arguments and forms in each argument are processed in the given | |
1551 | order, and if a previous form already translates TO to some other | |
1552 | character, say TO-ALT, FROM is also translated to TO-ALT." | |
f967223b | 1553 | (let ((table (make-char-table 'translation-table)) |
a73a8c89 KH |
1554 | revlist) |
1555 | (while args | |
1556 | (let ((elts (car args))) | |
1557 | (while elts | |
13d5617d KH |
1558 | (let* ((from (car (car elts))) |
1559 | (from-i 0) ; degree of freedom of FROM | |
1560 | (from-rev (nreverse (split-char from))) | |
1561 | (to (cdr (car elts))) | |
1562 | (to-i 0) ; degree of freedom of TO | |
1563 | (to-rev (nreverse (split-char to)))) | |
1564 | ;; Check numbers of heading 0s in FROM-REV and TO-REV. | |
1565 | (while (eq (car from-rev) 0) | |
1566 | (setq from-i (1+ from-i) from-rev (cdr from-rev))) | |
1567 | (while (eq (car to-rev) 0) | |
1568 | (setq to-i (1+ to-i) to-rev (cdr to-rev))) | |
1569 | (if (and (/= from-i to-i) (/= to-i 0)) | |
1570 | (error "Invalid character pair (%d . %d)" from to)) | |
b25eef20 KH |
1571 | ;; If we have already translated TO to TO-ALT, FROM should |
1572 | ;; also be translated to TO-ALT. But, this is only if TO | |
1573 | ;; is a generic character or TO-ALT is not a generic | |
13d5617d KH |
1574 | ;; character. |
1575 | (let ((to-alt (aref table to))) | |
1576 | (if (and to-alt | |
1577 | (or (> to-i 0) (not (generic-char-p to-alt)))) | |
1578 | (setq to to-alt))) | |
1579 | (if (> from-i 0) | |
1580 | (set-char-table-default table from to) | |
1581 | (aset table from to)) | |
b25eef20 KH |
1582 | ;; If we have already translated some chars to FROM, they |
1583 | ;; should also be translated to TO. | |
a73a8c89 KH |
1584 | (let ((l (assq from revlist))) |
1585 | (if l | |
1586 | (let ((ch (car l))) | |
1587 | (setcar l to) | |
1588 | (setq l (cdr l)) | |
1589 | (while l | |
1590 | (aset table ch to) | |
1591 | (setq l (cdr l)) )))) | |
1592 | ;; Now update REVLIST. | |
1593 | (let ((l (assq to revlist))) | |
1594 | (if l | |
1595 | (setcdr l (cons from (cdr l))) | |
1596 | (setq revlist (cons (list to from) revlist))))) | |
1597 | (setq elts (cdr elts)))) | |
1598 | (setq args (cdr args))) | |
1599 | ;; Return TABLE just created. | |
1600 | table)) | |
1601 | ||
c76b5c99 KH |
1602 | (defun make-translation-table-from-vector (vec) |
1603 | "Make translation table from decoding vector VEC. | |
1604 | VEC is an array of 256 elements to map unibyte codes to multibyte characters. | |
1605 | See also the variable `nonascii-translation-table'." | |
1606 | (let ((table (make-char-table 'translation-table)) | |
1607 | (rev-table (make-char-table 'translation-table)) | |
1608 | (i 0) | |
1609 | ch) | |
1610 | (while (< i 256) | |
1611 | (setq ch (aref vec i)) | |
1612 | (aset table i ch) | |
1613 | (if (>= ch 256) | |
1614 | (aset rev-table ch i)) | |
1615 | (setq i (1+ i))) | |
1616 | (set-char-table-extra-slot table 0 rev-table) | |
1617 | table)) | |
1618 | ||
f967223b | 1619 | (defun define-translation-table (symbol &rest args) |
a284eea3 DL |
1620 | "Define SYMBOL as the name of translation table made by ARGS. |
1621 | This sets up information so that the table can be used for | |
1622 | translations in a CCL program. | |
b25eef20 | 1623 | |
a284eea3 DL |
1624 | If the first element of ARGS is a char-table whose purpose is |
1625 | `translation-table', just define SYMBOL to name it. (Note that this | |
1626 | function does not bind SYMBOL.) | |
007c79c8 | 1627 | |
a284eea3 | 1628 | Any other ARGS should be suitable as arguments of the function |
007c79c8 | 1629 | `make-translation-table' (which see). |
b25eef20 | 1630 | |
452fdb31 | 1631 | This function sets properties `translation-table' and |
521d4010 DL |
1632 | `translation-table-id' of SYMBOL to the created table itself and the |
1633 | identification number of the table respectively. It also registers | |
1634 | the table in `translation-table-vector'." | |
007c79c8 KH |
1635 | (let ((table (if (and (char-table-p (car args)) |
1636 | (eq (char-table-subtype (car args)) | |
1637 | 'translation-table)) | |
1638 | (car args) | |
1639 | (apply 'make-translation-table args))) | |
f967223b | 1640 | (len (length translation-table-vector)) |
d9e3229d | 1641 | (id 0) |
b25eef20 | 1642 | (done nil)) |
f967223b | 1643 | (put symbol 'translation-table table) |
b25eef20 KH |
1644 | (while (not done) |
1645 | (if (>= id len) | |
f967223b KH |
1646 | (setq translation-table-vector |
1647 | (vconcat translation-table-vector (make-vector len nil)))) | |
1648 | (let ((slot (aref translation-table-vector id))) | |
b25eef20 KH |
1649 | (if (or (not slot) |
1650 | (eq (car slot) symbol)) | |
1651 | (progn | |
f967223b | 1652 | (aset translation-table-vector id (cons symbol table)) |
007c79c8 KH |
1653 | (setq done t)) |
1654 | (setq id (1+ id))))) | |
f967223b | 1655 | (put symbol 'translation-table-id id) |
d9e3229d KH |
1656 | id)) |
1657 | ||
35554641 KH |
1658 | (put 'with-category-table 'lisp-indent-function 1) |
1659 | ||
1660 | (defmacro with-category-table (category-table &rest body) | |
1661 | `(let ((current-category-table (category-table))) | |
1662 | (set-category-table ,category-table) | |
1663 | (unwind-protect | |
1664 | (progn ,@body) | |
1665 | (set-category-table current-category-table)))) | |
1666 | ||
69eba008 KH |
1667 | ;;; Initialize some variables. |
1668 | ||
1669 | (put 'use-default-ascent 'char-table-extra-slots 0) | |
1670 | (setq use-default-ascent (make-char-table 'use-default-ascent)) | |
d6d6d592 KH |
1671 | (put 'ignore-relative-composition 'char-table-extra-slots 0) |
1672 | (setq ignore-relative-composition | |
1673 | (make-char-table 'ignore-relative-composition)) | |
69eba008 KH |
1674 | |
1675 | ;;; | |
4ed46869 KH |
1676 | (provide 'mule) |
1677 | ||
1678 | ;;; mule.el ends here |