1 ;;; mm-util.el --- Utility functions for Mule and low level things
2 ;; Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
5 ;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; This file is part of GNU Emacs.
8 ;; GNU Emacs is free software; you can redistribute it and/or modify
9 ;; it under the terms of the GNU General Public License as published by
10 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; GNU Emacs is distributed in the hope that it will be useful,
14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;; GNU General Public License for more details.
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GNU Emacs; see the file COPYING. If not, write to the
20 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 ;; Boston, MA 02111-1307, USA.
27 (eval-when-compile (require 'cl))
33 (let ((nfunc (intern (format "mm-%s" (car elem)))))
34 (if (fboundp (car elem))
35 (defalias nfunc (car elem))
36 (defalias nfunc (cdr elem)))))
37 '((decode-coding-string . (lambda (s a) s))
38 (encode-coding-string . (lambda (s a) s))
39 (encode-coding-region . ignore)
40 (coding-system-list . ignore)
41 (decode-coding-region . ignore)
43 (device-type . ignore)
44 (coding-system-equal . equal)
45 (annotationp . ignore)
46 (set-buffer-file-coding-system . ignore)
48 . (lambda (charset int)
56 (mapcar (lambda (e) (list (symbol-name (car e))))
57 mm-mime-mule-charset-alist)
60 . (lambda (from to string) ;; stolen (and renamed) from nnheader.el
61 "Replace characters in STRING from FROM to TO."
62 (let ((string (substring string 0)) ;Copy string.
65 ;; Replace all occurrences of FROM with TO.
67 (when (= (aref string idx) from)
71 (string-as-unibyte . identity)
72 (string-as-multibyte . identity)
73 (multibyte-string-p . ignore))))
76 (defalias 'mm-char-or-char-int-p
78 ((fboundp 'char-or-char-int-p) 'char-or-char-int-p)
79 ((fboundp 'char-valid-p) 'char-valid-p)
83 (defalias 'mm-read-coding-system
85 ((fboundp 'read-coding-system)
86 (if (and (featurep 'xemacs)
87 (<= (string-to-number emacs-version) 21.1))
88 (lambda (prompt &optional default-coding-system)
89 (read-coding-system prompt))
91 (t (lambda (prompt &optional default-coding-system)
92 "Prompt the user for a coding system."
94 prompt (mapcar (lambda (s) (list (symbol-name (car s))))
95 mm-mime-mule-charset-alist)))))))
97 (defvar mm-coding-system-list nil)
98 (defun mm-get-coding-system-list ()
99 "Get the coding system list."
100 (or mm-coding-system-list
101 (setq mm-coding-system-list (mm-coding-system-list))))
103 (defun mm-coding-system-p (sym)
104 "Return non-nil if SYM is a coding system."
105 (or (and (fboundp 'coding-system-p) (coding-system-p sym))
106 (memq sym (mm-get-coding-system-list))))
108 (defvar mm-charset-synonym-alist
110 ;; Perfectly fine? A valid MIME name, anyhow.
111 ,@(unless (mm-coding-system-p 'big5)
113 ;; Not in XEmacs, but it's not a proper MIME charset anyhow.
114 ,@(unless (mm-coding-system-p 'x-ctext)
115 '((x-ctext . ctext)))
116 ;; Apparently not defined in Emacs 20, but is a valid MIME name.
117 ,@(unless (mm-coding-system-p 'gb2312)
118 '((gb2312 . cn-gb-2312)))
119 ;; ISO-8859-15 is very similar to ISO-8859-1.
120 ,@(unless (mm-coding-system-p 'iso-8859-15) ; Emacs 21 defines it.
121 '((iso-8859-15 . iso-8859-1)))
122 ;; Windows-1252 is actually a superset of Latin-1. See also
123 ;; `gnus-article-dumbquotes-map'.
124 ,@(unless (mm-coding-system-p 'windows-1252)
125 (if (mm-coding-system-p 'cp1252)
126 '((windows-1252 . cp1252))
127 '((windows-1252 . iso-8859-1))))
128 ;; Windows-1250 is a variant of Latin-2 heavily used by Microsoft
129 ;; Outlook users in Czech republic. Use this to allow reading of their
130 ;; e-mails. cp1250 should be defined by M-x codepage-setup.
131 ,@(if (and (not (mm-coding-system-p 'windows-1250))
132 (mm-coding-system-p 'cp1250))
133 '((windows-1250 . cp1250)))
135 "A mapping from invalid charset names to the real charset names.")
137 (defvar mm-binary-coding-system
139 ((mm-coding-system-p 'binary) 'binary)
140 ((mm-coding-system-p 'no-conversion) 'no-conversion)
142 "100% binary coding system.")
144 (defvar mm-text-coding-system
145 (or (if (memq system-type '(windows-nt ms-dos ms-windows))
146 (and (mm-coding-system-p 'raw-text-dos) 'raw-text-dos)
147 (and (mm-coding-system-p 'raw-text) 'raw-text))
148 mm-binary-coding-system)
149 "Text-safe coding system (For removing ^M).")
151 (defvar mm-text-coding-system-for-write nil
152 "Text coding system for write.")
154 (defvar mm-auto-save-coding-system
156 ((mm-coding-system-p 'emacs-mule)
157 (if (memq system-type '(windows-nt ms-dos ms-windows))
158 (if (mm-coding-system-p 'emacs-mule-dos)
159 'emacs-mule-dos mm-binary-coding-system)
161 ((mm-coding-system-p 'escape-quoted) 'escape-quoted)
162 (t mm-binary-coding-system))
163 "Coding system of auto save file.")
165 (defvar mm-universal-coding-system mm-auto-save-coding-system
166 "The universal coding system.")
168 ;; Fixme: some of the cars here aren't valid MIME charsets. That
169 ;; should only matter with XEmacs, though.
170 (defvar mm-mime-mule-charset-alist
172 (iso-8859-1 latin-iso8859-1)
173 (iso-8859-2 latin-iso8859-2)
174 (iso-8859-3 latin-iso8859-3)
175 (iso-8859-4 latin-iso8859-4)
176 (iso-8859-5 cyrillic-iso8859-5)
177 ;; Non-mule (X)Emacs uses the last mule-charset for 8bit characters.
178 ;; The fake mule-charset, gnus-koi8-r, tells Gnus that the default
179 ;; charset is koi8-r, not iso-8859-5.
180 (koi8-r cyrillic-iso8859-5 gnus-koi8-r)
181 (iso-8859-6 arabic-iso8859-6)
182 (iso-8859-7 greek-iso8859-7)
183 (iso-8859-8 hebrew-iso8859-8)
184 (iso-8859-9 latin-iso8859-9)
185 (iso-8859-14 latin-iso8859-14)
186 (iso-8859-15 latin-iso8859-15)
187 (viscii vietnamese-viscii-lower)
188 (iso-2022-jp latin-jisx0201 japanese-jisx0208 japanese-jisx0208-1978)
189 (euc-kr korean-ksc5601)
190 (gb2312 chinese-gb2312)
191 (big5 chinese-big5-1 chinese-big5-2)
193 (thai-tis620 thai-tis620)
194 (iso-2022-7bit ethiopic arabic-1-column arabic-2-column)
195 (iso-2022-jp-2 latin-iso8859-1 greek-iso8859-7
196 latin-jisx0201 japanese-jisx0208-1978
197 chinese-gb2312 japanese-jisx0208
198 korean-ksc5601 japanese-jisx0212
200 (iso-2022-int-1 latin-iso8859-1 greek-iso8859-7
201 latin-jisx0201 japanese-jisx0208-1978
202 chinese-gb2312 japanese-jisx0208
203 korean-ksc5601 japanese-jisx0212
204 chinese-cns11643-1 chinese-cns11643-2)
205 (iso-2022-int-1 latin-iso8859-1 latin-iso8859-2
206 cyrillic-iso8859-5 greek-iso8859-7
207 latin-jisx0201 japanese-jisx0208-1978
208 chinese-gb2312 japanese-jisx0208
209 korean-ksc5601 japanese-jisx0212
210 chinese-cns11643-1 chinese-cns11643-2
211 chinese-cns11643-3 chinese-cns11643-4
212 chinese-cns11643-5 chinese-cns11643-6
214 ,(if (or (not (fboundp 'charsetp)) ;; non-Mule case
215 (charsetp 'unicode-a)
216 (not (mm-coding-system-p 'mule-utf-8)))
217 '(utf-8 unicode-a unicode-b unicode-c unicode-d unicode-e)
218 ;; If we have utf-8 we're in Mule 5+.
221 (coding-system-get 'mule-utf-8 'safe-charsets)))))
222 "Alist of MIME-charset/MULE-charsets.")
224 ;; Correct by construction, but should be unnecessary:
226 (when (and (not (featurep 'xemacs))
227 (fboundp 'coding-system-list)
228 (fboundp 'sort-coding-systems))
229 (setq mm-mime-mule-charset-alist
234 (when (and (coding-system-get cs 'mime-charset)
235 (not (eq t (coding-system-get cs 'safe-charsets))))
236 (list (cons (coding-system-get cs 'mime-charset)
238 (coding-system-get cs 'safe-charsets))))))
239 (sort-coding-systems (coding-system-list 'base-only))))))
241 (defvar mm-hack-charsets '(iso-8859-15 iso-2022-jp-2)
242 "A list of special charsets.
243 Valid elements include:
244 `iso-8859-15' convert ISO-8859-1, -9 to ISO-8859-15 if ISO-8859-15 exists.
245 `iso-2022-jp-2' convert ISO-2022-jp to ISO-2022-jp-2 if ISO-2022-jp-2 exists."
248 (defvar mm-iso-8859-15-compatible
249 '((iso-8859-1 "\xA4\xA6\xA8\xB4\xB8\xBC\xBD\xBE")
250 (iso-8859-9 "\xA4\xA6\xA8\xB4\xB8\xBC\xBD\xBE\xD0\xDD\xDE\xF0\xFD\xFE"))
251 "ISO-8859-15 exchangeable coding systems and inconvertible characters.")
253 (defvar mm-iso-8859-x-to-15-table
254 (and (fboundp 'coding-system-p)
255 (mm-coding-system-p 'iso-8859-15)
258 (if (mm-coding-system-p (car cs))
259 (let ((c (string-to-char
260 (decode-coding-string "\341" (car cs)))))
261 (cons (char-charset c)
264 (decode-coding-string "\341" 'iso-8859-15)) c)
265 (string-to-list (decode-coding-string (car (cdr cs))
268 mm-iso-8859-15-compatible))
269 "A table of the difference character between ISO-8859-X and ISO-8859-15.")
271 ;;; Internal variables:
275 (defun mm-mule-charset-to-mime-charset (charset)
276 "Return the MIME charset corresponding to the given Mule CHARSET."
277 (if (fboundp 'find-coding-systems-for-charsets)
279 (dolist (cs (find-coding-systems-for-charsets (list charset)))
282 (setq mime (coding-system-get cs 'mime-charset)))))
284 (let ((alist mm-mime-mule-charset-alist)
287 (when (memq charset (cdar alist))
288 (setq out (caar alist)
293 (defun mm-charset-to-coding-system (charset &optional lbt)
294 "Return coding-system corresponding to CHARSET.
295 CHARSET is a symbol naming a MIME charset.
296 If optional argument LBT (`unix', `dos' or `mac') is specified, it is
297 used as the line break code type of the coding system."
298 (when (stringp charset)
299 (setq charset (intern (downcase charset))))
301 (setq charset (intern (format "%s-%s" charset lbt))))
305 ;; Running in a non-MULE environment.
306 ((null (mm-get-coding-system-list))
309 ((eq charset 'us-ascii)
311 ;; Check to see whether we can handle this charset. (This depends
312 ;; on there being some coding system matching each `mime-charset'
313 ;; property defined, as there should be.)
314 ((and (mm-coding-system-p charset)
315 ;;; Doing this would potentially weed out incorrect charsets.
317 ;;; (eq charset (coding-system-get charset 'mime-charset))
320 ;; Translate invalid charsets.
321 ((mm-coding-system-p (setq charset
323 mm-charset-synonym-alist))))
325 ;; Last resort: search the coding system list for entries which
326 ;; have the right mime-charset in case the canonical name isn't
327 ;; defined (though it should be).
329 ;; mm-get-coding-system-list returns a list of cs without lbt.
331 (dolist (c (mm-get-coding-system-list))
333 (eq charset (coding-system-get c 'mime-charset)))
337 (defsubst mm-replace-chars-in-string (string from to)
338 (mm-subst-char-in-string from to string))
341 (defvar mm-emacs-mule (and (not (featurep 'xemacs))
342 (boundp 'default-enable-multibyte-characters)
343 default-enable-multibyte-characters
344 (fboundp 'set-buffer-multibyte))
347 (defvar mm-mule4-p (and mm-emacs-mule
349 (not (charsetp 'eight-bit-control)))
353 (defun mm-enable-multibyte ()
354 "Set the multibyte flag of the current buffer.
355 Only do this if the default value of `enable-multibyte-characters' is
356 non-nil. This is a no-op in XEmacs."
357 (set-buffer-multibyte t))
358 (defalias 'mm-enable-multibyte 'ignore))
361 (defun mm-disable-multibyte ()
362 "Unset the multibyte flag of in the current buffer.
363 This is a no-op in XEmacs."
364 (set-buffer-multibyte nil))
365 (defalias 'mm-disable-multibyte 'ignore))
368 (defun mm-enable-multibyte-mule4 ()
369 "Enable multibyte in the current buffer.
370 Only used in Emacs Mule 4."
371 (set-buffer-multibyte t))
372 (defalias 'mm-enable-multibyte-mule4 'ignore))
375 (defun mm-disable-multibyte-mule4 ()
376 "Disable multibyte in the current buffer.
377 Only used in Emacs Mule 4."
378 (set-buffer-multibyte nil))
379 (defalias 'mm-disable-multibyte-mule4 'ignore)))
381 (defun mm-preferred-coding-system (charset)
382 ;; A typo in some Emacs versions.
383 (or (get-charset-property charset 'prefered-coding-system)
384 (get-charset-property charset 'preferred-coding-system)))
386 (defun mm-charset-after (&optional pos)
387 "Return charset of a character in current buffer at position POS.
388 If POS is nil, it defauls to the current point.
389 If POS is out of range, the value is nil.
390 If the charset is `composition', return the actual one."
391 (let ((char (char-after pos)) charset)
392 (if (< (mm-char-int char) 128)
393 (setq charset 'ascii)
394 ;; charset-after is fake in some Emacsen.
395 (setq charset (and (fboundp 'char-charset) (char-charset char)))
396 (if (eq charset 'composition)
397 (let ((p (or pos (point))))
398 (cadr (find-charset-region p (1+ p))))
399 (if (and charset (not (memq charset '(ascii eight-bit-control
400 eight-bit-graphic))))
403 mail-parse-mule-charset ;; cached mule-charset
405 (setq mail-parse-mule-charset
406 (and (boundp 'current-language-environment)
409 (assoc current-language-environment
410 language-info-alist))))))
411 (if (or (not mail-parse-mule-charset)
412 (eq mail-parse-mule-charset 'ascii))
413 (setq mail-parse-mule-charset
414 (or (car (last (assq mail-parse-charset
415 mm-mime-mule-charset-alist)))
416 ;; Fixme: don't fix that!
418 mail-parse-mule-charset)))))))
420 (defun mm-mime-charset (charset)
421 "Return the MIME charset corresponding to the given Mule CHARSET."
422 (if (eq charset 'unknown)
423 (error "The message contains non-printable characters, please use attachment"))
424 (if (and (fboundp 'coding-system-get) (fboundp 'get-charset-property))
425 ;; This exists in Emacs 20.
427 (and (mm-preferred-coding-system charset)
429 (mm-preferred-coding-system charset) 'mime-charset))
430 (and (eq charset 'ascii)
432 (mm-preferred-coding-system charset)
433 (mm-mule-charset-to-mime-charset charset))
434 ;; This is for XEmacs.
435 (mm-mule-charset-to-mime-charset charset)))
437 (defun mm-delete-duplicates (list)
438 "Simple substitute for CL `delete-duplicates', testing with `equal'."
441 (setq head (car list))
442 (setq list (delete head list))
443 (setq result (cons head result)))
446 ;; It's not clear whether this is supposed to mean the global or local
447 ;; setting. I think it's used inconsistently. -- fx
448 (defsubst mm-multibyte-p ()
449 "Say whether multibyte is enabled."
450 (if (and (not (featurep 'xemacs))
451 (boundp 'enable-multibyte-characters))
452 enable-multibyte-characters
455 (defun mm-iso-8859-x-to-15-region (&optional b e)
456 (if (fboundp 'char-charset)
457 (let (charset item c inconvertible)
459 (if e (narrow-to-region b e))
460 (goto-char (point-min))
461 (skip-chars-forward "\0-\177")
464 ((not (setq item (assq (char-charset (setq c (char-after)))
465 mm-iso-8859-x-to-15-table)))
467 ((memq c (cdr (cdr item)))
468 (setq inconvertible t)
471 (insert (prog1 (+ c (car (cdr item))) (delete-char 1))))
472 (skip-chars-forward "\0-\177"))))
473 (not inconvertible))))
475 (defun mm-find-mime-charset-region (b e &optional hack-charsets)
476 "Return the MIME charsets needed to encode the region between B and E.
477 Nil means ASCII, a single-element list represents an appropriate MIME
478 charset, and a longer list means no appropriate charset."
480 ;; The return possibilities of this function are a mess...
481 (or (and (mm-multibyte-p)
482 (fboundp 'find-coding-systems-region)
483 ;; Find the mime-charset of the most preferred coding
484 ;; system that has one.
485 (let ((systems (find-coding-systems-region b e)))
486 ;; Fixme: The `mime-charset' (`x-ctext') of `compound-text'
487 ;; is not in the IANA list.
488 (setq systems (delq 'compound-text systems))
489 (unless (equal systems '(undecided))
491 (let ((cs (coding-system-get (pop systems) 'mime-charset)))
494 charsets (list cs))))))
496 ;; Otherwise we're not multibyte, XEmacs or a single coding
497 ;; system won't cover it.
499 (mm-delete-duplicates
500 (mapcar 'mm-mime-charset
502 (mm-find-charset-region b e))))))
503 (if (and (memq 'iso-8859-15 charsets)
504 (memq 'iso-8859-15 hack-charsets)
505 (save-excursion (mm-iso-8859-x-to-15-region b e)))
506 (mapcar (lambda (x) (setq charsets (delq (car x) charsets)))
507 mm-iso-8859-15-compatible))
508 (if (and (memq 'iso-2022-jp-2 charsets)
509 (memq 'iso-2022-jp-2 hack-charsets))
510 (setq charsets (delq 'iso-2022-jp charsets)))
513 (defmacro mm-with-unibyte-buffer (&rest forms)
514 "Create a temporary buffer, and evaluate FORMS there like `progn'.
515 Use unibyte mode for this."
516 `(let (default-enable-multibyte-characters)
517 (with-temp-buffer ,@forms)))
518 (put 'mm-with-unibyte-buffer 'lisp-indent-function 0)
519 (put 'mm-with-unibyte-buffer 'edebug-form-spec '(body))
521 (defmacro mm-with-unibyte-current-buffer (&rest forms)
522 "Evaluate FORMS with current current buffer temporarily made unibyte.
523 Also bind `default-enable-multibyte-characters' to nil.
524 Equivalent to `progn' in XEmacs"
525 (let ((multibyte (make-symbol "multibyte"))
526 (buffer (make-symbol "buffer")))
528 (let ((,multibyte enable-multibyte-characters)
529 (,buffer (current-buffer)))
531 (let (default-enable-multibyte-characters)
532 (set-buffer-multibyte nil)
535 (set-buffer-multibyte ,multibyte)))
536 (let (default-enable-multibyte-characters)
538 (put 'mm-with-unibyte-current-buffer 'lisp-indent-function 0)
539 (put 'mm-with-unibyte-current-buffer 'edebug-form-spec '(body))
541 (defmacro mm-with-unibyte-current-buffer-mule4 (&rest forms)
542 "Evaluate FORMS there like `progn' in current buffer.
544 (let ((multibyte (make-symbol "multibyte"))
545 (buffer (make-symbol "buffer")))
547 (let ((,multibyte enable-multibyte-characters)
548 (,buffer (current-buffer)))
550 (let (default-enable-multibyte-characters)
551 (set-buffer-multibyte nil)
554 (set-buffer-multibyte ,multibyte)))
555 (let (default-enable-multibyte-characters)
557 (put 'mm-with-unibyte-current-buffer-mule4 'lisp-indent-function 0)
558 (put 'mm-with-unibyte-current-buffer-mule4 'edebug-form-spec '(body))
560 (defmacro mm-with-unibyte (&rest forms)
561 "Eval the FORMS with the default value of `enable-multibyte-characters' nil, ."
562 `(let (default-enable-multibyte-characters)
564 (put 'mm-with-unibyte 'lisp-indent-function 0)
565 (put 'mm-with-unibyte 'edebug-form-spec '(body))
567 (defun mm-find-charset-region (b e)
568 "Return a list of Emacs charsets in the region B to E."
570 ((and (mm-multibyte-p)
571 (fboundp 'find-charset-region))
572 ;; Remove composition since the base charsets have been included.
573 ;; Remove eight-bit-*, treat them as ascii.
574 (let ((css (find-charset-region b e)))
575 (mapcar (lambda (cs) (setq css (delq cs css)))
576 '(composition eight-bit-control eight-bit-graphic
580 ;; We are in a unibyte buffer or XEmacs non-mule, so we futz around a bit.
583 (narrow-to-region b e)
584 (goto-char (point-min))
585 (skip-chars-forward "\0-\177")
590 (and (boundp 'current-language-environment)
591 (car (last (assq 'charset
592 (assoc current-language-environment
593 language-info-alist))))))
594 (if (eq charset 'ascii) (setq charset nil))
597 (car (last (assq mail-parse-charset
598 mm-mime-mule-charset-alist)))))
599 (list 'ascii (or charset 'latin-iso8859-1)))))))))
601 (if (fboundp 'shell-quote-argument)
602 (defalias 'mm-quote-arg 'shell-quote-argument)
603 (defun mm-quote-arg (arg)
604 "Return a version of ARG that is safe to evaluate in a shell."
605 (let ((pos 0) new-pos accum)
606 ;; *** bug: we don't handle newline characters properly
607 (while (setq new-pos (string-match "[]*[;!'`\"$\\& \t{} |()<>]" arg pos))
608 (push (substring arg pos new-pos) accum)
610 (push (list (aref arg new-pos)) accum)
611 (setq pos (1+ new-pos)))
614 (apply 'concat (nconc (nreverse accum) (list (substring arg pos))))))))
616 (defun mm-auto-mode-alist ()
617 "Return an `auto-mode-alist' with only the .gz (etc) thingies."
618 (let ((alist auto-mode-alist)
621 (when (listp (cdar alist))
622 (push (car alist) out))
626 (defvar mm-inhibit-file-name-handlers
627 '(jka-compr-handler image-file-handler)
628 "A list of handlers doing (un)compression (etc) thingies.")
630 (defun mm-insert-file-contents (filename &optional visit beg end replace
632 "Like `insert-file-contents', q.v., but only reads in the file.
633 A buffer may be modified in several ways after reading into the buffer due
634 to advanced Emacs features, such as file-name-handlers, format decoding,
635 find-file-hooks, etc.
636 If INHIBIT is non-nil, inhibit mm-inhibit-file-name-handlers.
637 This function ensures that none of these modifications will take place."
638 (let ((format-alist nil)
639 (auto-mode-alist (if inhibit nil (mm-auto-mode-alist)))
640 (default-major-mode 'fundamental-mode)
641 (enable-local-variables nil)
642 (after-insert-file-functions nil)
643 (enable-local-eval nil)
644 (find-file-hooks nil)
645 (inhibit-file-name-operation (if inhibit
646 'insert-file-contents
647 inhibit-file-name-operation))
648 (inhibit-file-name-handlers
650 (append mm-inhibit-file-name-handlers
651 inhibit-file-name-handlers)
652 inhibit-file-name-handlers)))
653 (insert-file-contents filename visit beg end replace)))
655 (defun mm-append-to-file (start end filename &optional codesys inhibit)
656 "Append the contents of the region to the end of file FILENAME.
657 When called from a function, expects three arguments,
658 START, END and FILENAME. START and END are buffer positions
659 saying what text to write.
660 Optional fourth argument specifies the coding system to use when
662 If INHIBIT is non-nil, inhibit mm-inhibit-file-name-handlers."
663 (let ((coding-system-for-write
664 (or codesys mm-text-coding-system-for-write
665 mm-text-coding-system))
666 (inhibit-file-name-operation (if inhibit
668 inhibit-file-name-operation))
669 (inhibit-file-name-handlers
671 (append mm-inhibit-file-name-handlers
672 inhibit-file-name-handlers)
673 inhibit-file-name-handlers)))
674 (append-to-file start end filename)))
676 (defun mm-write-region (start end filename &optional append visit lockname
677 coding-system inhibit)
679 "Like `write-region'.
680 If INHIBIT is non-nil, inhibit mm-inhibit-file-name-handlers."
681 (let ((coding-system-for-write
682 (or coding-system mm-text-coding-system-for-write
683 mm-text-coding-system))
684 (inhibit-file-name-operation (if inhibit
686 inhibit-file-name-operation))
687 (inhibit-file-name-handlers
689 (append mm-inhibit-file-name-handlers
690 inhibit-file-name-handlers)
691 inhibit-file-name-handlers)))
692 (write-region start end filename append visit lockname)))
694 (defun mm-image-load-path (&optional package)
696 (dolist (path load-path (nreverse result))
697 (if (file-directory-p
698 (setq dir (concat (file-name-directory
699 (directory-file-name path))
700 "etc/" (or package "gnus/"))))
702 (push path result))))
706 ;;; mm-util.el ends here