1 ;;; mm-util.el --- Utility functions for Mule and low level things
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007 Free Software Foundation, Inc.
6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
7 ;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 3, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 ;; Boston, MA 02110-1301, USA.
29 (eval-when-compile (require 'cl))
35 (let ((nfunc (intern (format "mm-%s" (car elem)))))
36 (if (fboundp (car elem))
37 (defalias nfunc (car elem))
38 (defalias nfunc (cdr elem)))))
39 '((coding-system-list . ignore)
41 (coding-system-equal . equal)
42 (annotationp . ignore)
43 (set-buffer-file-coding-system . ignore)
45 . (lambda (charset int)
53 (mapcar (lambda (e) (list (symbol-name (car e))))
54 mm-mime-mule-charset-alist)
57 . (lambda (from to string &optional inplace)
58 ;; stolen (and renamed) from nnheader.el
59 "Replace characters in STRING from FROM to TO.
60 Unless optional argument INPLACE is non-nil, return a new string."
61 (let ((string (if inplace string (copy-sequence string)))
64 ;; Replace all occurrences of FROM with TO.
66 (when (= (aref string idx) from)
70 (string-as-unibyte . identity)
71 (string-make-unibyte . identity)
72 ;; string-as-multibyte often doesn't really do what you think it does.
74 ;; (aref (string-as-multibyte "\201") 0) -> 129 (aka ?\201)
75 ;; (aref (string-as-multibyte "\300") 0) -> 192 (aka ?\300)
76 ;; (aref (string-as-multibyte "\300\201") 0) -> 192 (aka ?\300)
77 ;; (aref (string-as-multibyte "\300\201") 1) -> 129 (aka ?\201)
79 ;; (aref (string-as-multibyte "\201\300") 0) -> 2240
80 ;; (aref (string-as-multibyte "\201\300") 1) -> <error>
81 ;; Better use string-to-multibyte or encode-coding-string.
82 ;; If you really need string-as-multibyte somewhere it's usually
83 ;; because you're using the internal emacs-mule representation (maybe
84 ;; because you're using string-as-unibyte somewhere), which is
85 ;; generally a problem in itself.
86 ;; Here is an approximate equivalence table to help think about it:
87 ;; (string-as-multibyte s) ~= (decode-coding-string s 'emacs-mule)
88 ;; (string-to-multibyte s) ~= (decode-coding-string s 'binary)
89 ;; (string-make-multibyte s) ~= (decode-coding-string s locale-coding-system)
90 (string-as-multibyte . identity)
91 (multibyte-string-p . ignore)
92 (insert-byte . insert-char)
93 (multibyte-char-to-unibyte . identity))))
96 (if (featurep 'xemacs)
97 (if (featurep 'file-coding)
98 ;; Don't modify string if CODING-SYSTEM is nil.
100 (defun mm-decode-coding-string (str coding-system)
102 (decode-coding-string str coding-system)
104 (defun mm-encode-coding-string (str coding-system)
106 (encode-coding-string str coding-system)
108 (defun mm-decode-coding-region (start end coding-system)
110 (decode-coding-region start end coding-system)))
111 (defun mm-encode-coding-region (start end coding-system)
113 (encode-coding-region start end coding-system))))
114 (defun mm-decode-coding-string (str coding-system) str)
115 (defun mm-encode-coding-string (str coding-system) str)
116 (defalias 'mm-decode-coding-region 'ignore)
117 (defalias 'mm-encode-coding-region 'ignore))
118 (defalias 'mm-decode-coding-string 'decode-coding-string)
119 (defalias 'mm-encode-coding-string 'encode-coding-string)
120 (defalias 'mm-decode-coding-region 'decode-coding-region)
121 (defalias 'mm-encode-coding-region 'encode-coding-region)))
125 ((fboundp 'replace-in-string)
126 (defalias 'mm-replace-in-string 'replace-in-string))
127 ((fboundp 'replace-regexp-in-string)
128 (defun mm-replace-in-string (string regexp newtext &optional literal)
129 "Replace all matches for REGEXP with NEWTEXT in STRING.
130 If LITERAL is non-nil, insert NEWTEXT literally. Return a new
131 string containing the replacements.
133 This is a compatibility function for different Emacsen."
134 (replace-regexp-in-string regexp newtext string nil literal)))
136 (defun mm-replace-in-string (string regexp newtext &optional literal)
137 "Replace all matches for REGEXP with NEWTEXT in STRING.
138 If LITERAL is non-nil, insert NEWTEXT literally. Return a new
139 string containing the replacements.
141 This is a compatibility function for different Emacsen."
142 (let ((start 0) tail)
143 (while (string-match regexp string start)
144 (setq tail (- (length string) (match-end 0)))
145 (setq string (replace-match newtext nil literal string))
146 (setq start (- (length string) tail))))
149 (defalias 'mm-string-to-multibyte
153 ((fboundp 'string-to-multibyte)
154 'string-to-multibyte)
157 "Return a multibyte string with the same individual chars as string."
159 (lambda (ch) (mm-string-as-multibyte (char-to-string ch)))
163 (defalias 'mm-char-or-char-int-p
165 ((fboundp 'char-or-char-int-p) 'char-or-char-int-p)
166 ((fboundp 'char-valid-p) 'char-valid-p)
169 ;; Fixme: This seems always to be used to read a MIME charset, so it
170 ;; should be re-named and fixed (in Emacs) to offer completion only on
171 ;; proper charset names (base coding systems which have a
172 ;; mime-charset defined). XEmacs doesn't believe in mime-charset;
174 ;; `(or (coding-system-get 'iso-8859-1 'mime-charset)
175 ;; (coding-system-get 'iso-8859-1 :mime-charset))'
176 ;; Actually, there should be an `mm-coding-system-mime-charset'.
178 (defalias 'mm-read-coding-system
180 ((fboundp 'read-coding-system)
181 (if (and (featurep 'xemacs)
182 (<= (string-to-number emacs-version) 21.1))
183 (lambda (prompt &optional default-coding-system)
184 (read-coding-system prompt))
185 'read-coding-system))
186 (t (lambda (prompt &optional default-coding-system)
187 "Prompt the user for a coding system."
189 prompt (mapcar (lambda (s) (list (symbol-name (car s))))
190 mm-mime-mule-charset-alist)))))))
192 (defvar mm-coding-system-list nil)
193 (defun mm-get-coding-system-list ()
194 "Get the coding system list."
195 (or mm-coding-system-list
196 (setq mm-coding-system-list (mm-coding-system-list))))
198 (defun mm-coding-system-p (cs)
199 "Return non-nil if CS is a symbol naming a coding system.
200 In XEmacs, also return non-nil if CS is a coding system object.
201 If CS is available, return CS itself in Emacs, and return a coding
202 system object in XEmacs."
203 (if (fboundp 'find-coding-system)
204 (and cs (find-coding-system cs))
205 (if (fboundp 'coding-system-p)
206 (when (coding-system-p cs)
209 (car (memq cs (mm-get-coding-system-list))))))
211 (defun mm-codepage-setup (number &optional alias)
212 "Create a coding system cpNUMBER.
213 The coding system is created using `codepage-setup'. If ALIAS is
214 non-nil, an alias is created and added to
215 `mm-charset-synonym-alist'. If ALIAS is a string, it's used as
216 the alias. Else windows-NUMBER is used."
218 (let ((completion-ignore-case t)
219 (candidates (cp-supported-codepages)))
220 (list (completing-read "Setup DOS Codepage: (default 437) " candidates
221 nil t nil nil "437"))))
223 (setq alias (if (stringp alias)
225 (intern (format "windows-%s" number)))))
226 (let* ((cp (intern (format "cp%s" number))))
227 (unless (mm-coding-system-p cp)
228 (codepage-setup number))
230 ;; Don't add alias if setup of cp failed.
231 (mm-coding-system-p cp))
232 (add-to-list 'mm-charset-synonym-alist (cons alias cp)))))
234 (defvar mm-charset-synonym-alist
236 ;; Not in XEmacs, but it's not a proper MIME charset anyhow.
237 ,@(unless (mm-coding-system-p 'x-ctext)
238 '((x-ctext . ctext)))
239 ;; ISO-8859-15 is very similar to ISO-8859-1. But it's _different_ in 8
241 ,@(unless (mm-coding-system-p 'iso-8859-15)
242 '((iso-8859-15 . iso-8859-1)))
243 ;; BIG-5HKSCS is similar to, but different than, BIG-5.
244 ,@(unless (mm-coding-system-p 'big5-hkscs)
245 '((big5-hkscs . big5)))
246 ;; A Microsoft misunderstanding.
247 ,@(when (and (not (mm-coding-system-p 'unicode))
248 (mm-coding-system-p 'utf-16-le))
249 '((unicode . utf-16-le)))
250 ;; A Microsoft misunderstanding.
251 ,@(unless (mm-coding-system-p 'ks_c_5601-1987)
252 (if (mm-coding-system-p 'cp949)
253 '((ks_c_5601-1987 . cp949))
254 '((ks_c_5601-1987 . euc-kr))))
255 ;; Windows-31J is Windows Codepage 932.
256 ,@(when (and (not (mm-coding-system-p 'windows-31j))
257 (mm-coding-system-p 'cp932))
258 '((windows-31j . cp932)))
260 "A mapping from unknown or invalid charset names to the real charset names.
262 See `mm-codepage-iso-8859-list' and `mm-codepage-ibm-list'.")
264 (defcustom mm-codepage-iso-8859-list
265 (list 1250 ;; Windows-1250 is a variant of Latin-2 heavily used by Microsoft
266 ;; Outlook users in Czech republic. Use this to allow reading of
267 ;; their e-mails. cp1250 should be defined by M-x codepage-setup
269 '(1252 . 1) ;; Windows-1252 is a superset of iso-8859-1 (West
270 ;; Europe). See also `gnus-article-dumbquotes-map'.
271 '(1254 . 9) ;; Windows-1254 is a superset of iso-8859-9 (Turkish).
272 '(1255 . 8));; Windows-1255 is a superset of iso-8859-8 (Hebrew).
273 "A list of Windows codepage numbers and iso-8859 charset numbers.
275 If an element is a number corresponding to a supported windows
276 codepage, appropriate entries to `mm-charset-synonym-alist' are
277 added by `mm-setup-codepage-iso-8859'. An element may also be a
278 cons cell where the car is a codepage number and the cdr is the
279 corresponding number of an iso-8859 charset."
280 :type '(list (set :inline t
281 (const 1250 :tag "Central and East European")
282 (const (1252 . 1) :tag "West European")
283 (const (1254 . 9) :tag "Turkish")
284 (const (1255 . 8) :tag "Hebrew"))
288 (integer :tag "Windows codepage number")
289 (cons (integer :tag "Windows codepage number")
290 (integer :tag "iso-8859 charset number")))))
291 :version "22.1" ;; Gnus 5.10.9
294 (defcustom mm-codepage-ibm-list
295 (list 437 ;; (US etc.)
299 863 ;; (Canadian French)
304 866 ;; (Cyrillic - Russian)
309 ;; In Emacs 23 (unicode), cp... and ibm... are aliases.
310 ;; Cf. http://thread.gmane.org/v9lkng5nwy.fsf@marauder.physik.uni-ulm.de
311 "List of IBM codepage numbers.
313 The codepage mappings slighly differ between IBM and other vendors.
314 See \"ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/IBM/README.TXT\".
316 If an element is a number corresponding to a supported windows
317 codepage, appropriate entries to `mm-charset-synonym-alist' are
318 added by `mm-setup-codepage-ibm'."
319 :type '(list (set :inline t
320 (const 437 :tag "US etc.")
321 (const 860 :tag "Portugal")
322 (const 861 :tag "Iceland")
323 (const 862 :tag "Israel")
324 (const 863 :tag "Canadian French")
325 (const 865 :tag "Nordic")
327 (const 850 :tag "Latin 1")
328 (const 855 :tag "Cyrillic")
329 (const 866 :tag "Cyrillic - Russian")
330 (const 857 :tag "Turkish")
331 (const 864 :tag "Arabic")
332 (const 869 :tag "Greek")
333 (const 874 :tag "Thai"))
336 (integer :tag "Codepage number")))
337 :version "22.1" ;; Gnus 5.10.9
340 (defun mm-setup-codepage-iso-8859 (&optional list)
341 "Add appropriate entries to `mm-charset-synonym-alist'.
342 Unless LIST is given, `mm-codepage-iso-8859-list' is used."
344 (setq list mm-codepage-iso-8859-list))
346 (let (cp windows iso)
348 (setq cp (intern (format "cp%d" (car i)))
349 windows (intern (format "windows-%d" (car i)))
350 iso (intern (format "iso-8859-%d" (cdr i))))
351 (setq cp (intern (format "cp%d" i))
352 windows (intern (format "windows-%d" i))))
353 (unless (mm-coding-system-p windows)
354 (if (mm-coding-system-p cp)
355 (add-to-list 'mm-charset-synonym-alist (cons windows cp))
356 (add-to-list 'mm-charset-synonym-alist (cons windows iso)))))))
358 (defun mm-setup-codepage-ibm (&optional list)
359 "Add appropriate entries to `mm-charset-synonym-alist'.
360 Unless LIST is given, `mm-codepage-ibm-list' is used."
362 (setq list mm-codepage-ibm-list))
363 (dolist (number list)
364 (let ((ibm (intern (format "ibm%d" number)))
365 (cp (intern (format "cp%d" number))))
366 (when (and (not (mm-coding-system-p ibm))
367 (mm-coding-system-p cp))
368 (add-to-list 'mm-charset-synonym-alist (cons ibm cp))))))
371 (mm-setup-codepage-iso-8859)
372 (mm-setup-codepage-ibm)
374 (defcustom mm-charset-override-alist
375 `((iso-8859-1 . windows-1252))
376 "A mapping from undesired charset names to their replacement.
378 You may add pairs like (iso-8859-1 . windows-1252) here,
379 i.e. treat iso-8859-1 as windows-1252. windows-1252 is a
380 superset of iso-8859-1."
381 :type '(list (set :inline t
382 (const (iso-8859-1 . windows-1252))
383 (const (undecided . windows-1252)))
386 (cons (symbol :tag "From charset")
387 (symbol :tag "To charset"))))
388 :version "22.1" ;; Gnus 5.10.9
391 (defcustom mm-charset-eval-alist
392 (if (featurep 'xemacs)
393 nil ;; I don't know what would be useful for XEmacs.
394 '(;; Emacs 21 offers 1250 1251 1253 1257. Emacs 22 provides autoloads for
395 ;; 1250-1258 (i.e. `mm-codepage-setup' does nothing).
396 (windows-1250 . (mm-codepage-setup 1250 t))
397 (windows-1251 . (mm-codepage-setup 1251 t))
398 (windows-1253 . (mm-codepage-setup 1253 t))
399 (windows-1257 . (mm-codepage-setup 1257 t))))
400 "An alist of (CHARSET . FORM) pairs.
401 If an article is encoded in an unknown CHARSET, FORM is
402 evaluated. This allows to load additional libraries providing
403 charsets on demand. If supported by your Emacs version, you
404 could use `autoload-coding-system' here."
405 :version "22.1" ;; Gnus 5.10.9
406 :type '(list (set :inline t
407 (const (windows-1250 . (mm-codepage-setup 1250 t)))
408 (const (windows-1251 . (mm-codepage-setup 1251 t)))
409 (const (windows-1253 . (mm-codepage-setup 1253 t)))
410 (const (windows-1257 . (mm-codepage-setup 1257 t)))
411 (const (cp850 . (mm-codepage-setup 850 nil))))
414 (cons (symbol :tag "charset")
415 (symbol :tag "form"))))
418 (defvar mm-binary-coding-system
420 ((mm-coding-system-p 'binary) 'binary)
421 ((mm-coding-system-p 'no-conversion) 'no-conversion)
423 "100% binary coding system.")
425 (defvar mm-text-coding-system
426 (or (if (memq system-type '(windows-nt ms-dos ms-windows))
427 (and (mm-coding-system-p 'raw-text-dos) 'raw-text-dos)
428 (and (mm-coding-system-p 'raw-text) 'raw-text))
429 mm-binary-coding-system)
430 "Text-safe coding system (For removing ^M).")
432 (defvar mm-text-coding-system-for-write nil
433 "Text coding system for write.")
435 (defvar mm-auto-save-coding-system
437 ((mm-coding-system-p 'utf-8-emacs) ; Mule 7
438 (if (memq system-type '(windows-nt ms-dos ms-windows))
439 (if (mm-coding-system-p 'utf-8-emacs-dos)
440 'utf-8-emacs-dos mm-binary-coding-system)
442 ((mm-coding-system-p 'emacs-mule)
443 (if (memq system-type '(windows-nt ms-dos ms-windows))
444 (if (mm-coding-system-p 'emacs-mule-dos)
445 'emacs-mule-dos mm-binary-coding-system)
447 ((mm-coding-system-p 'escape-quoted) 'escape-quoted)
448 (t mm-binary-coding-system))
449 "Coding system of auto save file.")
451 (defvar mm-universal-coding-system mm-auto-save-coding-system
452 "The universal coding system.")
454 ;; Fixme: some of the cars here aren't valid MIME charsets. That
455 ;; should only matter with XEmacs, though.
456 (defvar mm-mime-mule-charset-alist
458 (iso-8859-1 latin-iso8859-1)
459 (iso-8859-2 latin-iso8859-2)
460 (iso-8859-3 latin-iso8859-3)
461 (iso-8859-4 latin-iso8859-4)
462 (iso-8859-5 cyrillic-iso8859-5)
463 ;; Non-mule (X)Emacs uses the last mule-charset for 8bit characters.
464 ;; The fake mule-charset, gnus-koi8-r, tells Gnus that the default
465 ;; charset is koi8-r, not iso-8859-5.
466 (koi8-r cyrillic-iso8859-5 gnus-koi8-r)
467 (iso-8859-6 arabic-iso8859-6)
468 (iso-8859-7 greek-iso8859-7)
469 (iso-8859-8 hebrew-iso8859-8)
470 (iso-8859-9 latin-iso8859-9)
471 (iso-8859-14 latin-iso8859-14)
472 (iso-8859-15 latin-iso8859-15)
473 (viscii vietnamese-viscii-lower)
474 (iso-2022-jp latin-jisx0201 japanese-jisx0208 japanese-jisx0208-1978)
475 (euc-kr korean-ksc5601)
476 (gb2312 chinese-gb2312)
477 (big5 chinese-big5-1 chinese-big5-2)
479 (thai-tis620 thai-tis620)
480 (windows-1251 cyrillic-iso8859-5)
481 (iso-2022-7bit ethiopic arabic-1-column arabic-2-column)
482 (iso-2022-jp-2 latin-iso8859-1 greek-iso8859-7
483 latin-jisx0201 japanese-jisx0208-1978
484 chinese-gb2312 japanese-jisx0208
485 korean-ksc5601 japanese-jisx0212)
486 (iso-2022-int-1 latin-iso8859-1 greek-iso8859-7
487 latin-jisx0201 japanese-jisx0208-1978
488 chinese-gb2312 japanese-jisx0208
489 korean-ksc5601 japanese-jisx0212
490 chinese-cns11643-1 chinese-cns11643-2)
491 (iso-2022-int-1 latin-iso8859-1 latin-iso8859-2
492 cyrillic-iso8859-5 greek-iso8859-7
493 latin-jisx0201 japanese-jisx0208-1978
494 chinese-gb2312 japanese-jisx0208
495 korean-ksc5601 japanese-jisx0212
496 chinese-cns11643-1 chinese-cns11643-2
497 chinese-cns11643-3 chinese-cns11643-4
498 chinese-cns11643-5 chinese-cns11643-6
500 (iso-2022-jp-3 latin-jisx0201 japanese-jisx0208-1978 japanese-jisx0208
501 japanese-jisx0213-1 japanese-jisx0213-2)
502 (shift_jis latin-jisx0201 katakana-jisx0201 japanese-jisx0208)
503 ,(cond ((fboundp 'unicode-precedence-list)
504 (cons 'utf-8 (delq 'ascii (mapcar 'charset-name
505 (unicode-precedence-list)))))
506 ((or (not (fboundp 'charsetp)) ;; non-Mule case
507 (charsetp 'unicode-a)
508 (not (mm-coding-system-p 'mule-utf-8)))
509 '(utf-8 unicode-a unicode-b unicode-c unicode-d unicode-e))
510 (t ;; If we have utf-8 we're in Mule 5+.
513 (coding-system-get 'mule-utf-8 'safe-charsets))))))
514 "Alist of MIME-charset/MULE-charsets.")
516 (defun mm-enrich-utf-8-by-mule-ucs ()
517 "Make the `utf-8' MIME charset usable by the Mule-UCS package.
518 This function will run when the `un-define' module is loaded under
519 XEmacs, and fill the `utf-8' entry in `mm-mime-mule-charset-alist'
520 with Mule charsets. It is completely useless for Emacs."
521 (when (boundp 'unicode-basic-translation-charset-order-list)
527 'unicode-basic-translation-charset-order-list))))
528 (elem (assq 'utf-8 mm-mime-mule-charset-alist)))
531 (setq mm-mime-mule-charset-alist
532 (nconc mm-mime-mule-charset-alist
533 (list (cons 'utf-8 val))))))
536 ;; Correct by construction, but should be unnecessary for Emacs:
537 (if (featurep 'xemacs)
538 (eval-after-load "un-define" '(mm-enrich-utf-8-by-mule-ucs))
539 (when (and (fboundp 'coding-system-list)
540 (fboundp 'sort-coding-systems))
541 (let ((css (sort-coding-systems (coding-system-list 'base-only)))
545 mime (or (coding-system-get cs :mime-charset) ; Emacs 23 (unicode)
546 (coding-system-get cs 'mime-charset)))
548 (not (eq t (setq mule
549 (coding-system-get cs 'safe-charsets))))
550 (not (assq mime alist)))
551 (push (cons mime (delq 'ascii mule)) alist)))
552 (setq mm-mime-mule-charset-alist (nreverse alist)))))
554 (defvar mm-hack-charsets '(iso-8859-15 iso-2022-jp-2)
555 "A list of special charsets.
556 Valid elements include:
557 `iso-8859-15' convert ISO-8859-1, -9 to ISO-8859-15 if ISO-8859-15 exists.
558 `iso-2022-jp-2' convert ISO-2022-jp to ISO-2022-jp-2 if ISO-2022-jp-2 exists."
561 (defvar mm-iso-8859-15-compatible
562 '((iso-8859-1 "\xA4\xA6\xA8\xB4\xB8\xBC\xBD\xBE")
563 (iso-8859-9 "\xA4\xA6\xA8\xB4\xB8\xBC\xBD\xBE\xD0\xDD\xDE\xF0\xFD\xFE"))
564 "ISO-8859-15 exchangeable coding systems and inconvertible characters.")
566 (defvar mm-iso-8859-x-to-15-table
567 (and (fboundp 'coding-system-p)
568 (mm-coding-system-p 'iso-8859-15)
571 (if (mm-coding-system-p (car cs))
572 (let ((c (string-to-char
573 (decode-coding-string "\341" (car cs)))))
574 (cons (char-charset c)
577 (decode-coding-string "\341" 'iso-8859-15)) c)
578 (string-to-list (decode-coding-string (car (cdr cs))
581 mm-iso-8859-15-compatible))
582 "A table of the difference character between ISO-8859-X and ISO-8859-15.")
584 (defcustom mm-coding-system-priorities
585 (if (boundp 'current-language-environment)
586 (let ((lang (symbol-value 'current-language-environment)))
587 (cond ((string= lang "Japanese")
588 ;; Japanese users prefer iso-2022-jp to euc-japan or
589 ;; shift_jis, however iso-8859-1 should be used when
590 ;; there are only ASCII text and Latin-1 characters.
591 '(iso-8859-1 iso-2022-jp iso-2022-jp-2 shift_jis utf-8)))))
592 "Preferred coding systems for encoding outgoing messages.
594 More than one suitable coding system may be found for some text.
595 By default, the coding system with the highest priority is used
596 to encode outgoing messages (see `sort-coding-systems'). If this
597 variable is set, it overrides the default priority."
599 :type '(repeat (symbol :tag "Coding system"))
603 (defvar mm-use-find-coding-systems-region
604 (fboundp 'find-coding-systems-region)
605 "Use `find-coding-systems-region' to find proper coding systems.
607 Setting it to nil is useful on Emacsen supporting Unicode if sending
608 mail with multiple parts is preferred to sending a Unicode one.")
610 ;;; Internal variables:
614 (defun mm-mule-charset-to-mime-charset (charset)
615 "Return the MIME charset corresponding to the given Mule CHARSET."
616 (if (and (fboundp 'find-coding-systems-for-charsets)
617 (fboundp 'sort-coding-systems))
618 (let ((css (sort (sort-coding-systems
619 (find-coding-systems-for-charsets (list charset)))
620 'mm-sort-coding-systems-predicate))
622 (while (and (not mime)
624 (when (setq cs (pop css))
625 (setq mime (or (coding-system-get cs :mime-charset)
626 (coding-system-get cs 'mime-charset)))))
628 (let ((alist (mapcar (lambda (cs)
629 (assq cs mm-mime-mule-charset-alist))
630 (sort (mapcar 'car mm-mime-mule-charset-alist)
631 'mm-sort-coding-systems-predicate)))
634 (when (memq charset (cdar alist))
635 (setq out (caar alist)
640 (defun mm-charset-to-coding-system (charset &optional lbt
642 "Return coding-system corresponding to CHARSET.
643 CHARSET is a symbol naming a MIME charset.
644 If optional argument LBT (`unix', `dos' or `mac') is specified, it is
645 used as the line break code type of the coding system.
647 If ALLOW-OVERRIDE is given, use `mm-charset-override-alist' to
648 map undesired charset names to their replacement. This should
649 only be used for decoding, not for encoding."
650 ;; OVERRIDE is used (only) in `mm-decode-body' and `mm-decode-string'.
651 (when (stringp charset)
652 (setq charset (intern (downcase charset))))
654 (setq charset (intern (format "%s-%s" charset lbt))))
658 ;; Running in a non-MULE environment.
659 ((or (null (mm-get-coding-system-list))
660 (not (fboundp 'coding-system-get)))
662 ;; Check override list quite early. Should only used for decoding, not for
665 (let ((cs (cdr (assq charset mm-charset-override-alist))))
666 (and cs (mm-coding-system-p cs) cs))))
668 ((eq charset 'us-ascii)
670 ;; Check to see whether we can handle this charset. (This depends
671 ;; on there being some coding system matching each `mime-charset'
672 ;; property defined, as there should be.)
673 ((and (mm-coding-system-p charset)
674 ;;; Doing this would potentially weed out incorrect charsets.
676 ;;; (eq charset (coding-system-get charset 'mime-charset))
679 ;; Eval expressions from `mm-charset-eval-alist'
680 ((let* ((el (assq charset mm-charset-eval-alist))
687 (condition-case nil (eval form) (error nil))
688 ;; (message "Failed to eval `%s'" form))
689 (mm-coding-system-p cs)
690 (message "Added charset `%s' via `mm-charset-eval-alist'" cs))
692 ;; Translate invalid charsets.
693 ((let ((cs (cdr (assq charset mm-charset-synonym-alist))))
695 (mm-coding-system-p cs)
697 ;; "Using synonym `%s' from `mm-charset-synonym-alist' for `%s'"
700 ;; Last resort: search the coding system list for entries which
701 ;; have the right mime-charset in case the canonical name isn't
702 ;; defined (though it should be).
704 ;; mm-get-coding-system-list returns a list of cs without lbt.
706 (dolist (c (mm-get-coding-system-list))
708 (eq charset (or (coding-system-get c :mime-charset)
709 (coding-system-get c 'mime-charset))))
712 ;; Warn the user about unknown charset:
713 (if (fboundp 'gnus-message)
714 (gnus-message 7 "Unknown charset: %s" charset)
715 (message "Unknown charset: %s" charset)))
718 (defsubst mm-replace-chars-in-string (string from to)
719 (mm-subst-char-in-string from to string))
722 (defvar mm-emacs-mule (and (not (featurep 'xemacs))
723 (boundp 'default-enable-multibyte-characters)
724 default-enable-multibyte-characters
725 (fboundp 'set-buffer-multibyte))
726 "True in Emacs with Mule.")
729 (defun mm-enable-multibyte ()
730 "Set the multibyte flag of the current buffer.
731 Only do this if the default value of `enable-multibyte-characters' is
732 non-nil. This is a no-op in XEmacs."
733 (set-buffer-multibyte 'to))
734 (defalias 'mm-enable-multibyte 'ignore))
737 (defun mm-disable-multibyte ()
738 "Unset the multibyte flag of in the current buffer.
739 This is a no-op in XEmacs."
740 (set-buffer-multibyte nil))
741 (defalias 'mm-disable-multibyte 'ignore)))
743 (defun mm-preferred-coding-system (charset)
744 ;; A typo in some Emacs versions.
745 (or (get-charset-property charset 'preferred-coding-system)
746 (get-charset-property charset 'prefered-coding-system)))
748 ;; Mule charsets shouldn't be used.
749 (defsubst mm-guess-charset ()
750 "Guess Mule charset from the language environment."
752 mail-parse-mule-charset ;; cached mule-charset
754 (setq mail-parse-mule-charset
755 (and (boundp 'current-language-environment)
758 (assoc current-language-environment
759 language-info-alist))))))
760 (if (or (not mail-parse-mule-charset)
761 (eq mail-parse-mule-charset 'ascii))
762 (setq mail-parse-mule-charset
763 (or (car (last (assq mail-parse-charset
764 mm-mime-mule-charset-alist)))
767 mail-parse-mule-charset)))
769 (defun mm-charset-after (&optional pos)
770 "Return charset of a character in current buffer at position POS.
771 If POS is nil, it defauls to the current point.
772 If POS is out of range, the value is nil.
773 If the charset is `composition', return the actual one."
774 (let ((char (char-after pos)) charset)
775 (if (< (mm-char-int char) 128)
776 (setq charset 'ascii)
777 ;; charset-after is fake in some Emacsen.
778 (setq charset (and (fboundp 'char-charset) (char-charset char)))
779 (if (eq charset 'composition) ; Mule 4
780 (let ((p (or pos (point))))
781 (cadr (find-charset-region p (1+ p))))
782 (if (and charset (not (memq charset '(ascii eight-bit-control
783 eight-bit-graphic))))
785 (mm-guess-charset))))))
787 (defun mm-mime-charset (charset)
788 "Return the MIME charset corresponding to the given Mule CHARSET."
789 (if (eq charset 'unknown)
790 (error "The message contains non-printable characters, please use attachment"))
791 (if (and (fboundp 'coding-system-get) (fboundp 'get-charset-property))
792 ;; This exists in Emacs 20.
794 (and (mm-preferred-coding-system charset)
795 (or (coding-system-get
796 (mm-preferred-coding-system charset) :mime-charset)
798 (mm-preferred-coding-system charset) 'mime-charset)))
799 (and (eq charset 'ascii)
801 (mm-preferred-coding-system charset)
802 (mm-mule-charset-to-mime-charset charset))
803 ;; This is for XEmacs.
804 (mm-mule-charset-to-mime-charset charset)))
806 (if (fboundp 'delete-dups)
807 (defalias 'mm-delete-duplicates 'delete-dups)
808 (defun mm-delete-duplicates (list)
809 "Destructively remove `equal' duplicates from LIST.
810 Store the result in LIST and return it. LIST must be a proper list.
811 Of several `equal' occurrences of an element in LIST, the first
814 This is a compatibility function for Emacsen without `delete-dups'."
815 ;; Code from `subr.el' in Emacs 22:
818 (setcdr tail (delete (car tail) (cdr tail)))
819 (setq tail (cdr tail))))
822 ;; Fixme: This is used in places when it should be testing the
823 ;; default multibyteness. See mm-default-multibyte-p.
825 (if (and (not (featurep 'xemacs))
826 (boundp 'enable-multibyte-characters))
827 (defun mm-multibyte-p ()
828 "Non-nil if multibyte is enabled in the current buffer."
829 enable-multibyte-characters)
830 (defun mm-multibyte-p () (featurep 'mule))))
832 (defun mm-default-multibyte-p ()
833 "Return non-nil if the session is multibyte.
834 This affects whether coding conversion should be attempted generally."
836 (if (boundp 'default-enable-multibyte-characters)
837 default-enable-multibyte-characters
840 (defun mm-iso-8859-x-to-15-region (&optional b e)
841 (if (fboundp 'char-charset)
842 (let (charset item c inconvertible)
844 (if e (narrow-to-region b e))
845 (goto-char (point-min))
846 (skip-chars-forward "\0-\177")
849 ((not (setq item (assq (char-charset (setq c (char-after)))
850 mm-iso-8859-x-to-15-table)))
852 ((memq c (cdr (cdr item)))
853 (setq inconvertible t)
856 (insert-before-markers (prog1 (+ c (car (cdr item)))
858 (skip-chars-forward "\0-\177")))
859 (not inconvertible))))
861 (defun mm-sort-coding-systems-predicate (a b)
864 ;; Note: invalid entries are dropped silently
865 (and (setq cs (mm-coding-system-p cs))
866 (coding-system-base cs)))
867 mm-coding-system-priorities)))
868 (and (setq a (mm-coding-system-p a))
869 (if (setq b (mm-coding-system-p b))
870 (> (length (memq (coding-system-base a) priorities))
871 (length (memq (coding-system-base b) priorities)))
875 (autoload 'latin-unity-massage-name "latin-unity")
876 (autoload 'latin-unity-maybe-remap "latin-unity")
877 (autoload 'latin-unity-representations-feasible-region "latin-unity")
878 (autoload 'latin-unity-representations-present-region "latin-unity")
879 (defvar latin-unity-coding-systems)
880 (defvar latin-unity-ucs-list))
882 (defun mm-xemacs-find-mime-charset-1 (begin end)
883 "Determine which MIME charset to use to send region as message.
884 This uses the XEmacs-specific latin-unity package to better handle the
885 case where identical characters from diverse ISO-8859-? character sets
886 can be encoded using a single one of the corresponding coding systems.
888 It treats `mm-coding-system-priorities' as the list of preferred
889 coding systems; a useful example setting for this list in Western
890 Europe would be '(iso-8859-1 iso-8859-15 utf-8), which would default
891 to the very standard Latin 1 coding system, and only move to coding
892 systems that are less supported as is necessary to encode the
893 characters that exist in the buffer.
895 Latin Unity doesn't know about those non-ASCII Roman characters that
896 are available in various East Asian character sets. As such, its
897 behavior if you have a JIS 0212 LATIN SMALL LETTER A WITH ACUTE in a
898 buffer and it can otherwise be encoded as Latin 1, won't be ideal.
899 But this is very much a corner case, so don't worry about it."
900 (let ((systems mm-coding-system-priorities) csets psets curset)
902 ;; Load the Latin Unity library, if available.
903 (when (and (not (featurep 'latin-unity)) (locate-library "latin-unity"))
904 (ignore-errors (require 'latin-unity)))
906 ;; Now, can we use it?
907 (if (featurep 'latin-unity)
909 (setq csets (latin-unity-representations-feasible-region begin end)
910 psets (latin-unity-representations-present-region begin end))
914 ;; Pass back the first coding system in the preferred list
915 ;; that can encode the whole region.
916 (dolist (curset systems)
917 (setq curset (latin-unity-massage-name 'buffer-default curset))
919 ;; If the coding system is a universal coding system, then
920 ;; it can certainly encode all the characters in the region.
921 (if (memq curset latin-unity-ucs-list)
922 (throw 'done (list curset)))
924 ;; If a coding system isn't universal, and isn't in
925 ;; the list that latin unity knows about, we can't
926 ;; decide whether to use it here. Leave that until later
927 ;; in `mm-find-mime-charset-region' function, whence we
929 (unless (memq curset latin-unity-coding-systems)
932 ;; Right, we know about this coding system, and it may
933 ;; conceivably be able to encode all the characters in
935 (if (latin-unity-maybe-remap begin end curset csets psets t)
936 (throw 'done (list curset))))
938 ;; Can't encode using anything from the
939 ;; `mm-coding-system-priorities' list.
940 ;; Leave `mm-find-mime-charset' to do most of the work.
943 ;; Right, latin unity isn't available; let `mm-find-charset-region'
944 ;; take its default action, which equally applies to GNU Emacs.
947 (defmacro mm-xemacs-find-mime-charset (begin end)
948 (when (featurep 'xemacs)
949 `(and (featurep 'mule) (mm-xemacs-find-mime-charset-1 ,begin ,end))))
951 (defun mm-find-mime-charset-region (b e &optional hack-charsets)
952 "Return the MIME charsets needed to encode the region between B and E.
953 nil means ASCII, a single-element list represents an appropriate MIME
954 charset, and a longer list means no appropriate charset."
956 ;; The return possibilities of this function are a mess...
957 (or (and (mm-multibyte-p)
958 mm-use-find-coding-systems-region
959 ;; Find the mime-charset of the most preferred coding
960 ;; system that has one.
961 (let ((systems (find-coding-systems-region b e)))
962 (when mm-coding-system-priorities
964 (sort systems 'mm-sort-coding-systems-predicate)))
965 (setq systems (delq 'compound-text systems))
966 (unless (equal systems '(undecided))
968 (let* ((head (pop systems))
969 (cs (or (coding-system-get head :mime-charset)
970 (coding-system-get head 'mime-charset))))
971 ;; The mime-charset (`x-ctext') of
972 ;; `compound-text' is not in the IANA list. We
973 ;; shouldn't normally use anything here with a
974 ;; mime-charset having an `x-' prefix.
975 ;; Fixme: Allow this to be overridden, since
976 ;; there is existing use of x-ctext.
977 ;; Also people apparently need the coding system
978 ;; `iso-2022-jp-3' (which Mule-UCS defines with
979 ;; mime-charset, though it's not valid).
981 (not (string-match "^[Xx]-" (symbol-name cs)))
982 ;; UTF-16 of any variety is invalid for
983 ;; text parts and, unfortunately, has
984 ;; mime-charset defined both in Mule-UCS
985 ;; and versions of Emacs. (The name
986 ;; might be `mule-utf-16...' or
988 (not (string-match "utf-16" (symbol-name cs))))
990 charsets (list cs))))))
992 ;; If we're XEmacs, and some coding system is appropriate,
993 ;; mm-xemacs-find-mime-charset will return an appropriate list.
994 ;; Otherwise, we'll get nil, and the next setq will get invoked.
995 (setq charsets (mm-xemacs-find-mime-charset b e))
997 ;; We're not multibyte, or a single coding system won't cover it.
999 (mm-delete-duplicates
1000 (mapcar 'mm-mime-charset
1002 (mm-find-charset-region b e))))))
1003 (if (and (> (length charsets) 1)
1004 (memq 'iso-8859-15 charsets)
1005 (memq 'iso-8859-15 hack-charsets)
1006 (save-excursion (mm-iso-8859-x-to-15-region b e)))
1007 (mapcar (lambda (x) (setq charsets (delq (car x) charsets)))
1008 mm-iso-8859-15-compatible))
1009 (if (and (memq 'iso-2022-jp-2 charsets)
1010 (memq 'iso-2022-jp-2 hack-charsets))
1011 (setq charsets (delq 'iso-2022-jp charsets)))
1012 ;; Attempt to reduce the number of charsets if utf-8 is available.
1013 (if (and (featurep 'xemacs)
1014 (> (length charsets) 1)
1015 (mm-coding-system-p 'utf-8))
1016 (let ((mm-coding-system-priorities
1017 (cons 'utf-8 mm-coding-system-priorities)))
1019 (mm-delete-duplicates
1020 (mapcar 'mm-mime-charset
1022 (mm-find-charset-region b e)))))))
1025 (defmacro mm-with-unibyte-buffer (&rest forms)
1026 "Create a temporary buffer, and evaluate FORMS there like `progn'.
1027 Use unibyte mode for this."
1028 `(let (default-enable-multibyte-characters)
1029 (with-temp-buffer ,@forms)))
1030 (put 'mm-with-unibyte-buffer 'lisp-indent-function 0)
1031 (put 'mm-with-unibyte-buffer 'edebug-form-spec '(body))
1033 (defmacro mm-with-multibyte-buffer (&rest forms)
1034 "Create a temporary buffer, and evaluate FORMS there like `progn'.
1035 Use multibyte mode for this."
1036 `(let ((default-enable-multibyte-characters t))
1037 (with-temp-buffer ,@forms)))
1038 (put 'mm-with-multibyte-buffer 'lisp-indent-function 0)
1039 (put 'mm-with-multibyte-buffer 'edebug-form-spec '(body))
1041 (defmacro mm-with-unibyte-current-buffer (&rest forms)
1042 "Evaluate FORMS with current buffer temporarily made unibyte.
1043 Also bind `default-enable-multibyte-characters' to nil.
1044 Equivalent to `progn' in XEmacs
1046 NOTE: Use this macro with caution in multibyte buffers (it is not
1047 worth using this macro in unibyte buffers of course). Use of
1048 `(set-buffer-multibyte t)', which is run finally, is generally
1049 harmful since it is likely to modify existing data in the buffer.
1050 For instance, it converts \"\\300\\255\" into \"\\255\" in
1051 Emacs 23 (unicode)."
1052 (let ((multibyte (make-symbol "multibyte"))
1053 (buffer (make-symbol "buffer")))
1055 (let ((,multibyte enable-multibyte-characters)
1056 (,buffer (current-buffer)))
1058 (let (default-enable-multibyte-characters)
1059 (set-buffer-multibyte nil)
1061 (set-buffer ,buffer)
1062 (set-buffer-multibyte ,multibyte)))
1063 (let (default-enable-multibyte-characters)
1065 (put 'mm-with-unibyte-current-buffer 'lisp-indent-function 0)
1066 (put 'mm-with-unibyte-current-buffer 'edebug-form-spec '(body))
1068 (defmacro mm-with-unibyte (&rest forms)
1069 "Eval the FORMS with the default value of `enable-multibyte-characters' nil."
1070 `(let (default-enable-multibyte-characters)
1072 (put 'mm-with-unibyte 'lisp-indent-function 0)
1073 (put 'mm-with-unibyte 'edebug-form-spec '(body))
1075 (defmacro mm-with-multibyte (&rest forms)
1076 "Eval the FORMS with the default value of `enable-multibyte-characters' t."
1077 `(let ((default-enable-multibyte-characters t))
1079 (put 'mm-with-multibyte 'lisp-indent-function 0)
1080 (put 'mm-with-multibyte 'edebug-form-spec '(body))
1082 (defun mm-find-charset-region (b e)
1083 "Return a list of Emacs charsets in the region B to E."
1085 ((and (mm-multibyte-p)
1086 (fboundp 'find-charset-region))
1087 ;; Remove composition since the base charsets have been included.
1088 ;; Remove eight-bit-*, treat them as ascii.
1089 (let ((css (find-charset-region b e)))
1090 (mapcar (lambda (cs) (setq css (delq cs css)))
1091 '(composition eight-bit-control eight-bit-graphic
1095 ;; We are in a unibyte buffer or XEmacs non-mule, so we futz around a bit.
1098 (narrow-to-region b e)
1099 (goto-char (point-min))
1100 (skip-chars-forward "\0-\177")
1105 (and (boundp 'current-language-environment)
1106 (car (last (assq 'charset
1107 (assoc current-language-environment
1108 language-info-alist))))))
1109 (if (eq charset 'ascii) (setq charset nil))
1112 (car (last (assq mail-parse-charset
1113 mm-mime-mule-charset-alist)))))
1114 (list 'ascii (or charset 'latin-iso8859-1)))))))))
1116 (if (fboundp 'shell-quote-argument)
1117 (defalias 'mm-quote-arg 'shell-quote-argument)
1118 (defun mm-quote-arg (arg)
1119 "Return a version of ARG that is safe to evaluate in a shell."
1120 (let ((pos 0) new-pos accum)
1121 ;; *** bug: we don't handle newline characters properly
1122 (while (setq new-pos (string-match "[]*[;!'`\"$\\& \t{} |()<>]" arg pos))
1123 (push (substring arg pos new-pos) accum)
1125 (push (list (aref arg new-pos)) accum)
1126 (setq pos (1+ new-pos)))
1129 (apply 'concat (nconc (nreverse accum) (list (substring arg pos))))))))
1131 (defun mm-auto-mode-alist ()
1132 "Return an `auto-mode-alist' with only the .gz (etc) thingies."
1133 (let ((alist auto-mode-alist)
1136 (when (listp (cdar alist))
1137 (push (car alist) out))
1141 (defvar mm-inhibit-file-name-handlers
1142 '(jka-compr-handler image-file-handler)
1143 "A list of handlers doing (un)compression (etc) thingies.")
1145 (defun mm-insert-file-contents (filename &optional visit beg end replace
1147 "Like `insert-file-contents', but only reads in the file.
1148 A buffer may be modified in several ways after reading into the buffer due
1149 to advanced Emacs features, such as file-name-handlers, format decoding,
1150 `find-file-hooks', etc.
1151 If INHIBIT is non-nil, inhibit `mm-inhibit-file-name-handlers'.
1152 This function ensures that none of these modifications will take place."
1153 (let* ((format-alist nil)
1154 (auto-mode-alist (if inhibit nil (mm-auto-mode-alist)))
1155 (default-major-mode 'fundamental-mode)
1156 (enable-local-variables nil)
1157 (after-insert-file-functions nil)
1158 (enable-local-eval nil)
1159 (inhibit-file-name-operation (if inhibit
1160 'insert-file-contents
1161 inhibit-file-name-operation))
1162 (inhibit-file-name-handlers
1164 (append mm-inhibit-file-name-handlers
1165 inhibit-file-name-handlers)
1166 inhibit-file-name-handlers))
1167 (ffh (if (boundp 'find-file-hook)
1170 (val (symbol-value ffh)))
1173 (insert-file-contents filename visit beg end replace)
1176 (defun mm-append-to-file (start end filename &optional codesys inhibit)
1177 "Append the contents of the region to the end of file FILENAME.
1178 When called from a function, expects three arguments,
1179 START, END and FILENAME. START and END are buffer positions
1180 saying what text to write.
1181 Optional fourth argument specifies the coding system to use when
1183 If INHIBIT is non-nil, inhibit `mm-inhibit-file-name-handlers'."
1184 (let ((coding-system-for-write
1185 (or codesys mm-text-coding-system-for-write
1186 mm-text-coding-system))
1187 (inhibit-file-name-operation (if inhibit
1189 inhibit-file-name-operation))
1190 (inhibit-file-name-handlers
1192 (append mm-inhibit-file-name-handlers
1193 inhibit-file-name-handlers)
1194 inhibit-file-name-handlers)))
1195 (write-region start end filename t 'no-message)
1196 (message "Appended to %s" filename)))
1198 (defun mm-write-region (start end filename &optional append visit lockname
1199 coding-system inhibit)
1201 "Like `write-region'.
1202 If INHIBIT is non-nil, inhibit `mm-inhibit-file-name-handlers'."
1203 (let ((coding-system-for-write
1204 (or coding-system mm-text-coding-system-for-write
1205 mm-text-coding-system))
1206 (inhibit-file-name-operation (if inhibit
1208 inhibit-file-name-operation))
1209 (inhibit-file-name-handlers
1211 (append mm-inhibit-file-name-handlers
1212 inhibit-file-name-handlers)
1213 inhibit-file-name-handlers)))
1214 (write-region start end filename append visit lockname)))
1216 ;; It is not a MIME function, but some MIME functions use it.
1217 (if (and (fboundp 'make-temp-file)
1219 (let ((def (symbol-function 'make-temp-file)))
1220 (and (byte-code-function-p def)
1221 (setq def (if (fboundp 'compiled-function-arglist)
1223 (eval (list 'compiled-function-arglist def))
1226 (eq (nth 3 def) 'suffix)))))
1227 (defalias 'mm-make-temp-file 'make-temp-file)
1228 ;; Stolen (and modified for Emacs 20 and XEmacs) from Emacs 22.
1229 (defun mm-make-temp-file (prefix &optional dir-flag suffix)
1230 "Create a temporary file.
1231 The returned file name (created by appending some random characters at the end
1232 of PREFIX, and expanding against `temporary-file-directory' if necessary),
1233 is guaranteed to point to a newly created empty file.
1234 You can then use `write-region' to write new data into the file.
1236 If DIR-FLAG is non-nil, create a new empty directory instead of a file.
1238 If SUFFIX is non-nil, add that at the end of the file name."
1239 (let ((umask (default-file-modes))
1243 ;; Create temp files with strict access rights. It's easy to
1244 ;; loosen them later, whereas it's impossible to close the
1245 ;; time-window of loose permissions otherwise.
1246 (set-default-file-modes 448)
1247 (while (condition-case err
1253 (if (fboundp 'temp-directory)
1256 temporary-file-directory))))
1258 (setq file (concat file suffix)))
1260 (make-directory file)
1261 ;; NOTE: This is unsafe if Emacs 20
1262 ;; users and XEmacs users don't use
1263 ;; a secure temp directory.
1264 (gmm-write-region "" nil file nil 'silent
1267 (file-already-exists t)
1268 ;; The Emacs 20 and XEmacs versions of
1269 ;; `make-directory' issue `file-error'.
1270 (file-error (or (and (or (featurep 'xemacs)
1271 (= emacs-major-version 20))
1272 (file-exists-p file))
1273 (signal (car err) (cdr err)))))
1274 ;; the file was somehow created by someone else between
1275 ;; `make-temp-name' and `write-region', let's try again.
1279 (set-default-file-modes umask)))))
1281 (defun mm-image-load-path (&optional package)
1283 (dolist (path load-path (nreverse result))
1286 (setq dir (concat (file-name-directory
1287 (directory-file-name path))
1288 "etc/images/" (or package "gnus/")))))
1290 (push path result))))
1292 ;; Fixme: This doesn't look useful where it's used.
1293 (if (fboundp 'detect-coding-region)
1294 (defun mm-detect-coding-region (start end)
1295 "Like `detect-coding-region' except returning the best one."
1296 (let ((coding-systems
1297 (detect-coding-region start end)))
1298 (or (car-safe coding-systems)
1300 (defun mm-detect-coding-region (start end)
1301 (let ((point (point)))
1303 (skip-chars-forward "\0-\177" end)
1305 (if (eq (point) end) 'ascii (mm-guess-charset))
1306 (goto-char point)))))
1308 (if (fboundp 'coding-system-get)
1309 (defun mm-detect-mime-charset-region (start end)
1310 "Detect MIME charset of the text in the region between START and END."
1311 (let ((cs (mm-detect-coding-region start end)))
1312 (or (coding-system-get cs :mime-charset)
1313 (coding-system-get cs 'mime-charset))))
1314 (defun mm-detect-mime-charset-region (start end)
1315 "Detect MIME charset of the text in the region between START and END."
1316 (let ((cs (mm-detect-coding-region start end)))
1322 ;; arch-tag: 94dc5388-825d-4fd1-bfa5-2100aa351238
1323 ;;; mm-util.el ends here