/usr/share/emacs/site-lisp/flim/mel.el is in flim 1:1.14.9+0.20110516-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 | ;;; mel.el --- A MIME encoding/decoding library.
;; Copyright (C) 1995,1996,1997,1998,1999,2000 Free Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <tomo@m17n.org>
;; Created: 1995/6/25
;; Keywords: MIME, Base64, Quoted-Printable, uuencode, gzip64
;; This file is part of FLIM (Faithful Library about Internet Message).
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation; either version 2, or (at
;; your option) any later version.
;; This program is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Code:
(require 'mime-def)
(require 'alist)
(defcustom mime-encoding-list
'("7bit" "8bit" "binary" "base64" "quoted-printable")
"List of Content-Transfer-Encoding. Each encoding must be string."
:group 'mime
:type '(repeat string))
(defun mime-encoding-list (&optional service)
"Return list of Content-Transfer-Encoding.
If SERVICE is specified, it returns available list of
Content-Transfer-Encoding for it."
(if service
(let (dest)
(mapatoms (lambda (sym)
(or (eq sym nil)
(setq dest (cons (symbol-name sym) dest)))
)
(symbol-value (intern (format "%s-obarray" service))))
(let ((rest mel-encoding-module-alist)
pair)
(while (setq pair (car rest))
(let ((key (car pair)))
(or (member key dest)
(<= (length key) 1)
(setq dest (cons key dest))))
(setq rest (cdr rest)))
)
dest)
mime-encoding-list))
(defun mime-encoding-alist (&optional service)
"Return table of Content-Transfer-Encoding for completion."
(mapcar #'list (mime-encoding-list service)))
(defsubst mel-use-module (name encodings)
(while encodings
(set-alist 'mel-encoding-module-alist
(car encodings)
(cons name (cdr (assoc (car encodings)
mel-encoding-module-alist))))
(setq encodings (cdr encodings))))
(defsubst mel-find-function (service encoding)
(mel-find-function-from-obarray
(symbol-value (intern (format "%s-obarray" service))) encoding))
;;; @ setting for modules
;;;
(defun 8bit-insert-encoded-file (filename)
"Insert file FILENAME encoded by \"7bit\" format."
(let ((coding-system-for-read 'raw-text)
format-alist)
;; Returns list of absolute file name and length of data inserted.
(insert-file-contents filename)))
(defun 8bit-write-decoded-region (start end filename)
"Decode and write current region encoded by \"8bit\" into FILENAME."
(let ((coding-system-for-write 'raw-text)
format-alist)
(write-region start end filename)))
(mel-define-backend "8bit")
(mel-define-method-function (mime-encode-string string (nil "8bit"))
'identity)
(mel-define-method-function (mime-decode-string string (nil "8bit"))
'identity)
(mel-define-method mime-encode-region (start end (nil "8bit")))
(mel-define-method mime-decode-region (start end (nil "8bit")))
(mel-define-method-function (mime-insert-encoded-file filename (nil "8bit"))
'8bit-insert-encoded-file)
(mel-define-method-function (mime-write-decoded-region
start end filename (nil "8bit"))
'8bit-write-decoded-region)
(defalias '7bit-insert-encoded-file '8bit-insert-encoded-file)
(defalias '7bit-write-decoded-region '8bit-write-decoded-region)
(mel-define-backend "7bit" ("8bit"))
(defun binary-write-decoded-region (start end filename)
"Decode and write current region encoded by \"binary\" into FILENAME."
(let ((coding-system-for-write 'binary)
jka-compr-compression-info-list jam-zcat-filename-list)
(write-region start end filename)))
(defalias 'binary-insert-encoded-file 'insert-file-contents-literally)
(defun binary-find-file-noselect (filename &optional nowarn rawfile)
"Like `find-file-noselect', q.v., but don't code and format conversion."
(let ((coding-system-for-read 'binary)
format-alist)
(find-file-noselect filename nowarn rawfile)))
(defun binary-funcall (name &rest args)
"Like `funcall', q.v., but read and write as binary."
(let ((coding-system-for-read 'binary)
(coding-system-for-write 'binary))
(apply name args)))
(defun binary-to-text-funcall (coding-system name &rest args)
"Like `funcall', q.v., but write as binary and read as text.
Read text is decoded as CODING-SYSTEM."
(let ((coding-system-for-read coding-system)
(coding-system-for-write 'binary))
(apply name args)))
(mel-define-backend "binary")
(mel-define-method-function (mime-encode-string string (nil "binary"))
'identity)
(mel-define-method-function (mime-decode-string string (nil "binary"))
'identity)
(mel-define-method mime-encode-region (start end (nil "binary")))
(mel-define-method mime-decode-region (start end (nil "binary")))
(mel-define-method-function (mime-insert-encoded-file filename (nil "binary"))
'binary-insert-encoded-file)
(mel-define-method-function (mime-write-decoded-region
start end filename (nil "binary"))
'binary-write-decoded-region)
(defvar mel-b-builtin
(and (fboundp 'base64-encode-string)
(subrp (symbol-function 'base64-encode-string))))
(when mel-b-builtin
(mel-define-backend "base64")
(mel-define-method-function (mime-encode-string string (nil "base64"))
'base64-encode-string)
(mel-define-method-function (mime-decode-string string (nil "base64"))
'base64-decode-string)
(mel-define-method-function (mime-encode-region start end (nil "base64"))
'base64-encode-region)
(mel-define-method-function (mime-decode-region start end (nil "base64"))
'base64-decode-region)
(mel-define-method mime-insert-encoded-file (filename (nil "base64"))
"Encode contents of file FILENAME to base64, and insert the result.
It calls external base64 encoder specified by
`base64-external-encoder'. So you must install the program (maybe
mmencode included in metamail or XEmacs package)."
(interactive "*fInsert encoded file: ")
(insert (base64-encode-string
(with-temp-buffer
(set-buffer-multibyte nil)
(binary-insert-encoded-file filename)
(buffer-string))))
(or (bolp) (insert ?\n)))
(mel-define-method mime-write-decoded-region (start end filename
(nil "base64"))
"Decode the region from START to END and write out to FILENAME."
(interactive "*r\nFWrite decoded region to file: ")
(let ((str (buffer-substring start end)))
(with-temp-buffer
(insert str)
(base64-decode-region (point-min) (point-max))
(write-region-as-binary (point-min) (point-max) filename))))
;; (mel-define-method-function (encoded-text-encode-string string (nil "B"))
;; 'base64-encode-string)
(mel-define-method encoded-text-decode-string (string (nil "B"))
(if (string-match (eval-when-compile
(concat "\\`" B-encoded-text-regexp "\\'"))
string)
(base64-decode-string string)
(error "Invalid encoded-text %s" string)))
)
(mel-use-module 'mel-b-el '("base64" "B"))
(mel-use-module 'mel-q '("quoted-printable" "Q"))
(mel-use-module 'mel-g '("x-gzip64"))
(mel-use-module 'mel-u '("x-uue" "x-uuencode"))
(defvar mel-b-ccl-module
(and (featurep 'mule)
(progn
(require 'path-util)
(module-installed-p 'mel-b-ccl))))
(defvar mel-q-ccl-module
(and (featurep 'mule)
(progn
(require 'path-util)
(module-installed-p 'mel-q-ccl))))
(when mel-b-ccl-module
(mel-use-module 'mel-b-ccl '("base64" "B")))
(when mel-q-ccl-module
(mel-use-module 'mel-q-ccl '("quoted-printable" "Q")))
(when base64-dl-module
(mel-use-module 'mel-b-dl '("base64" "B")))
;;; @ region
;;;
;;;###autoload
(defun mime-encode-region (start end encoding)
"Encode region START to END of current buffer using ENCODING.
ENCODING must be string."
(interactive
(list (region-beginning)(region-end)
(completing-read "Encoding: "
(mime-encoding-alist)
nil t "base64")))
(funcall (mel-find-function 'mime-encode-region encoding) start end))
;;;###autoload
(defun mime-decode-region (start end encoding)
"Decode region START to END of current buffer using ENCODING.
ENCODING must be string."
(interactive
(list (region-beginning)(region-end)
(completing-read "Encoding: "
(mime-encoding-alist 'mime-decode-region)
nil t "base64")))
(funcall (mel-find-function 'mime-decode-region encoding)
start end))
;;; @ string
;;;
;;;###autoload
(defun mime-decode-string (string encoding)
"Decode STRING using ENCODING.
ENCODING must be string. If ENCODING is found in
`mime-string-decoding-method-alist' as its key, this function decodes
the STRING by its value."
(let ((f (mel-find-function 'mime-decode-string encoding)))
(if f
(funcall f string)
string)))
(mel-define-service encoded-text-encode-string)
(defun encoded-text-encode-string (string encoding &optional mode)
"Encode STRING as encoded-text using ENCODING.
ENCODING must be string.
Optional argument MODE allows `text', `comment', `phrase' or nil.
Default value is `phrase'."
(if (string= encoding "B")
(base64-encode-string string 'no-line-break)
(let ((f (mel-find-function 'encoded-text-encode-string encoding)))
(if f
(funcall f string mode)
string))))
(mel-define-service encoded-text-decode-string (string encoding)
"Decode STRING as encoded-text using ENCODING. ENCODING must be string.")
(defun base64-encoded-length (string)
(* (/ (+ (length string) 2) 3) 4))
(defsubst Q-encoding-printable-char-p (chr mode)
(and (not (memq chr '(?= ?? ?_)))
(<= ?\ chr)(<= chr ?~)
(cond ((eq mode 'text) t)
((eq mode 'comment)
(not (memq chr '(?\( ?\) ?\\))))
(t
(string-match "[A-Za-z0-9!*+/=_---]" (char-to-string chr))))))
(defun Q-encoded-text-length (string &optional mode)
(let ((l 0)(i 0)(len (length string)) chr)
(while (< i len)
(setq chr (aref string i))
(if (or (Q-encoding-printable-char-p chr mode)
(eq chr ? ))
(setq l (+ l 1))
(setq l (+ l 3)))
(setq i (+ i 1)))
l))
;;; @ file
;;;
;;;###autoload
(defun mime-insert-encoded-file (filename encoding)
"Insert file FILENAME encoded by ENCODING format."
(interactive
(list (read-file-name "Insert encoded file: ")
(completing-read "Encoding: "
(mime-encoding-alist)
nil t "base64")))
(funcall (mel-find-function 'mime-insert-encoded-file encoding)
filename))
;;;###autoload
(defun mime-write-decoded-region (start end filename encoding)
"Decode and write current region encoded by ENCODING into FILENAME.
START and END are buffer positions."
(interactive
(list (region-beginning)(region-end)
(read-file-name "Write decoded region to file: ")
(completing-read "Encoding: "
(mime-encoding-alist 'mime-write-decoded-region)
nil t "base64")))
(funcall (mel-find-function 'mime-write-decoded-region encoding)
start end filename))
;;; @ end
;;;
(provide 'mel)
;;; mel.el ends here.
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