(require 'qp)
(require 'uudecode)
+;; 8bit treatment gets any char except: 0x32 - 0x7f, CR, LF, TAB, BEL,
+;; BS, vertical TAB, form feed, and ^_
+(defvar mm-8bit-char-regexp "[^\x20-\x7f\r\n\t\x7\x8\xb\xc\x1f]")
+
(defun mm-encode-body ()
"Encode a body.
Should be called narrowed to the body that is to be encoded.
MULE charsets are returned.
If successful, the MIME charset is returned.
If no encoding was done, nil is returned."
- (save-excursion
- (goto-char (point-min))
- (let ((charsets
- (delq 'ascii (mm-find-charset-region (point-min) (point-max))))
- charset)
- (cond
- ;; No encoding.
- ((null charsets)
- nil)
- ;; Too many charsets.
- ((> (length charsets) 1)
- charsets)
- ;; We encode.
- (t
- (let ((mime-charset
- (mm-mime-charset (car charsets) (point-min) (point-max)))
- start)
- (when (or t
- ;; We always decode.
- (not (mm-coding-system-equal
- mime-charset buffer-file-coding-system)))
- (while (not (eobp))
- (if (eq (char-charset (char-after)) 'ascii)
- (when start
- (save-restriction
- (narrow-to-region start (point))
- (mm-encode-coding-region start (point) mime-charset)
- (goto-char (point-max)))
- (setq start nil))
- (unless start
- (setq start (point))))
- (forward-char 1))
- (when start
- (mm-encode-coding-region start (point) mime-charset)
- (setq start nil)))
- mime-charset))))))
+ (if (not (featurep 'mule))
+ ;; In the non-Mule case, we search for non-ASCII chars and
+ ;; return the value of `mm-default-charset' if any are found.
+ (save-excursion
+ (goto-char (point-min))
+ (if (re-search-forward "[^\x0-\x7f]" nil t)
+ mm-default-charset
+ ;; The logic in `mml-generate-mime-1' confirms that it's OK
+ ;; to return nil here.
+ nil))
+ (save-excursion
+ (goto-char (point-min))
+ (let ((charsets
+ (delq 'ascii (mm-find-charset-region (point-min) (point-max))))
+ charset)
+ (cond
+ ;; No encoding.
+ ((null charsets)
+ nil)
+ ;; Too many charsets.
+ ((> (length charsets) 1)
+ charsets)
+ ;; We encode.
+ (t
+ (let ((mime-charset
+ (mm-mime-charset (car charsets) (point-min) (point-max)))
+ start)
+ (when (or t
+ ;; We always decode.
+ (not (mm-coding-system-equal
+ mime-charset buffer-file-coding-system)))
+ (while (not (eobp))
+ (if (eq (char-charset (char-after)) 'ascii)
+ (when start
+ (save-restriction
+ (narrow-to-region start (point))
+ (mm-encode-coding-region start (point) mime-charset)
+ (goto-char (point-max)))
+ (setq start nil))
+ (unless start
+ (setq start (point))))
+ (forward-char 1))
+ (when start
+ (mm-encode-coding-region start (point) mime-charset)
+ (setq start nil)))
+ mime-charset)))))))
(defun mm-body-encoding ()
"Return the encoding of the current buffer."
- (if (and
- (null (delq 'ascii (find-charset-region (point-min) (point-max))))
- ;;;!!!The following is necessary because the function
- ;;;!!!above seems to return the wrong result under Emacs 20.3.
- ;;;!!!Sometimes.
- (save-excursion
- (goto-char (point-min))
- (skip-chars-forward "\0-\177")
- (eobp)))
- '7bit
- '8bit))
+ (cond ((not (featurep 'mule))
+ (if (save-excursion
+ (goto-char (point-min))
+ (re-search-forward mm-8bit-char-regexp nil t))
+ '8bit
+ '7bit))
+ (t
+ ;; Mule version
+ (if (and (null (delq 'ascii (find-charset-region (point-min) (point-max))))
+ ;;!!!The following is necessary because the function
+ ;;!!!above seems to return the wrong result under
+ ;;!!!Emacs 20.3. Sometimes.
+ (save-excursion
+ (goto-char (point-min))
+ (skip-chars-forward "\0-\177")
+ (eobp)))
+ '7bit
+ '8bit))))
;;;
;;; Functions for decoding
(let (mule-charset)
(when (and charset
(setq mule-charset (mm-charset-to-coding-system charset))
- buffer-file-coding-system
+ ;; buffer-file-coding-system
+ ;Article buffer is nil coding system
+ ;in XEmacs
enable-multibyte-characters
(or (not (eq mule-charset 'ascii))
(setq mule-charset rfc2047-default-charset)))