(require 'lisp-mode)
(defcustom mail-use-rfc822 nil "\
*If non-nil, use a full, hairy RFC822 parser on mail addresses.
Otherwise, (the default) use a smaller, somewhat faster, and
often correct parser."
:type 'boolean
:group 'mail)
(defun mail-file-babyl-p (file)
(let ((buf (generate-new-buffer " *rmail-file-p*")))
(unwind-protect
(save-excursion
(set-buffer buf)
(insert-file-contents file nil 0 100)
(looking-at "BABYL OPTIONS:"))
(kill-buffer buf))))
(defun mail-string-delete (string start end)
"Returns a string containing all of STRING except the part
from START (inclusive) to END (exclusive)."
(if (null end) (substring string 0 start)
(concat (substring string 0 start)
(substring string end nil))))
(defun mail-quote-printable (string &optional wrapper)
"Convert a string to the \"quoted printable\" Q encoding.
If the optional argument WRAPPER is non-nil,
we add the wrapper characters =?ISO-8859-1?Q?....?=."
(let ((i 0) (result ""))
(save-match-data
(while (string-match "[?=\"\200-\377]" string i)
(setq result
(concat result (substring string i (match-beginning 0))
(upcase (format "=%02x"
(aref string (match-beginning 0))))))
(setq i (match-end 0)))
(if wrapper
(concat "=?ISO-8859-1?Q?"
result (substring string i)
"?=")
(concat result (substring string i))))))
(defun mail-unquote-printable-hexdigit (char)
(if (>= char ?A)
(+ (- char ?A) 10)
(- char ?0)))
(defun mail-unquote-printable (string &optional wrapper)
"Undo the \"quoted printable\" encoding.
If the optional argument WRAPPER is non-nil,
we expect to find and remove the wrapper characters =?ISO-8859-1?Q?....?=."
(save-match-data
(and wrapper
(string-match "\\`=\\?ISO-8859-1\\?Q\\?\\([^?]*\\)\\?" string)
(setq string (match-string 1 string)))
(let ((i 0) strings)
(while (string-match "=\\(..\\|\n\\)" string i)
(setq strings (cons (substring string i (match-beginning 0)) strings))
(unless (= (aref string (match-beginning 1)) ?\n)
(setq strings
(cons (make-string 1
(+ (* 16 (mail-unquote-printable-hexdigit
(aref string (match-beginning 1))))
(mail-unquote-printable-hexdigit
(aref string (1+ (match-beginning 1))))))
strings)))
(setq i (match-end 0)))
(apply 'concat (nreverse (cons (substring string i) strings))))))
(defun mail-unquote-printable-region (beg end &optional wrapper)
"Undo the \"quoted printable\" encoding in buffer from BEG to END.
If the optional argument WRAPPER is non-nil,
we expect to find and remove the wrapper characters =?ISO-8859-1?Q?....?=."
(interactive "r\nP")
(save-match-data
(save-excursion
(save-restriction
(narrow-to-region beg end)
(goto-char (point-min))
(when (and wrapper
(looking-at "\\`=\\?ISO-8859-1\\?Q\\?\\([^?]*\\)\\?"))
(delete-region (match-end 1) end)
(delete-region (point) (match-beginning 1)))
(while (re-search-forward "=\\(..\\|\n\\)" nil t)
(goto-char (match-end 0))
(replace-match
(if (= (char-after (match-beginning 1)) ?\n)
""
(make-string 1
(+ (* 16 (mail-unquote-printable-hexdigit
(char-after (match-beginning 1))))
(mail-unquote-printable-hexdigit
(char-after (1+ (match-beginning 1)))))))
t t))))))
(defun mail-strip-quoted-names (address)
"Delete comments and quoted strings in an address list ADDRESS.
Also delete leading/trailing whitespace and replace FOO <BAR> with just BAR.
Return a modified address list."
(if (null address)
nil
(if mail-use-rfc822
(progn (require 'rfc822)
(mapconcat 'identity (rfc822-addresses address) ", "))
(let (pos)
(if (string-match "[ \t]*(\\([^)\\]\\|\\\\.\\|\\\\\n\\)*(" address)
(with-current-buffer (get-buffer-create " *temp*")
(erase-buffer)
(insert address)
(set-syntax-table lisp-mode-syntax-table)
(goto-char 1)
(while (search-forward "(" nil t)
(forward-char -1)
(skip-chars-backward " \t")
(delete-region (point)
(save-excursion
(condition-case ()
(forward-sexp 1)
(error (goto-char (point-max))))
(point))))
(setq address (buffer-string))
(erase-buffer))
(while (setq pos (string-match
"[ \t]*(\\([^)\\]\\|\\\\.\\|\\\\\n\\)*)"
address))
(setq address (replace-match "" nil nil address 0))))
(string-match "\\`[ \t\n]*" address)
(setq address (substring address
(match-end 0)
(string-match "[ \t\n]*\\'" address
(match-end 0))))
(setq pos 0)
(while (setq pos (string-match
"\\([ \t]?\\)\\([ \t]*\"\\([^\"\\]\\|\\\\.\\|\\\\\n\\)*\"[ \t\n]*\\)"
address pos))
(if (and (> (length address) (match-end 0))
(= (aref address (match-end 0)) ?@))
(setq pos (match-end 0))
(setq address (replace-match "" nil nil address 2))))
(while (setq pos (string-match "\\(,\\s-*\\|\\`\\)\\([^,]*<\\([^>,:]*\\)>[^,]*\\)\\(\\s-*,\\|\\'\\)"
address))
(setq address (replace-match (match-string 3 address)
nil 'literal address 2)))
address))))
(defun rmail-dont-reply-to (userids)
"Returns string of mail addresses USERIDS sans any recipients
that start with matches for `rmail-dont-reply-to-names'.
Usenet paths ending in an element that matches are removed also."
(if (null rmail-dont-reply-to-names)
(setq rmail-dont-reply-to-names
(concat (if rmail-default-dont-reply-to-names
(concat rmail-default-dont-reply-to-names "\\|")
"")
(concat (regexp-quote (user-login-name))
"\\>"))))
(let ((match (concat "\\(^\\|,\\)[ \t\n]*"
"\\([^,\n]*[!<]\\|\\)"
"\\("
rmail-dont-reply-to-names
"\\|"
"\\([^\,.<\"]\\|\"[^\"]*\"\\)*"
"<\\(" rmail-dont-reply-to-names "\\)"
"\\)[^,]*"))
(case-fold-search t)
pos epos)
(while (and (setq pos (string-match match userids pos))
(> (length userids) 0))
(let (inside-quotes quote-pos last-quote-pos)
(save-match-data
(while (and (setq quote-pos (string-match "\"" userids quote-pos))
(< quote-pos pos))
(setq last-quote-pos quote-pos)
(setq quote-pos (1+ quote-pos))
(setq inside-quotes (not inside-quotes))))
(if inside-quotes
(if (string-match "\"" userids pos)
(setq pos (string-match "\"" userids pos))
(setq userids (replace-match "" nil nil userids))
(setq userids (concat (substring userids 0 last-quote-pos)
(substring userids (1+ last-quote-pos))))
(setq pos (1- pos)))
(setq userids (replace-match "" nil nil userids)))))
(if (setq pos (string-match "[ ,\t\n]*\\'" userids))
(setq userids (substring userids 0 pos)))
(if (string-match "\\(\\s \\|,\\)*" userids)
(substring userids (match-end 0))
userids)))
(defun mail-fetch-field (field-name &optional last all list)
"Return the value of the header field whose type is FIELD-NAME.
The buffer is expected to be narrowed to just the header of the message.
If second arg LAST is non-nil, use the last field of type FIELD-NAME.
If third arg ALL is non-nil, concatenate all such fields with commas between.
If 4th arg LIST is non-nil, return a list of all such fields."
(save-excursion
(goto-char (point-min))
(let ((case-fold-search t)
(name (concat "^" (regexp-quote field-name) "[ \t]*:[ \t]*")))
(if (or all list)
(let ((value (if all "")))
(while (re-search-forward name nil t)
(let ((opoint (point)))
(while (progn (forward-line 1)
(looking-at "[ \t]")))
(forward-char -1)
(skip-chars-backward " \t" opoint)
(if list
(setq value (cons (buffer-substring-no-properties
opoint (point))
value))
(setq value (concat value
(if (string= value "") "" ", ")
(buffer-substring-no-properties
opoint (point)))))))
(if list
value
(and (not (string= value "")) value)))
(if (re-search-forward name nil t)
(progn
(if last (while (re-search-forward name nil t)))
(let ((opoint (point)))
(while (progn (forward-line 1)
(looking-at "[ \t]")))
(forward-char -1)
(skip-chars-backward " \t" opoint)
(buffer-substring-no-properties opoint (point)))))))))
(defun mail-parse-comma-list ()
(let (accumulated
beg)
(skip-chars-forward " \t\n")
(while (not (eobp))
(setq beg (point))
(skip-chars-forward "^,")
(skip-chars-backward " \t\n")
(setq accumulated
(cons (buffer-substring-no-properties beg (point))
accumulated))
(skip-chars-forward "^,")
(skip-chars-forward ", \t\n"))
accumulated))
(defun mail-comma-list-regexp (labels)
(let (pos)
(setq pos (or (string-match "[^ \t]" labels) 0))
(setq labels (substring labels pos (string-match "[ \t]*$" labels pos)))
(while (setq pos (string-match "[ \t]*,[ \t]*" labels))
(setq labels
(concat (substring labels 0 pos)
"\\|"
(substring labels (match-end 0))))))
labels)
(defun mail-rfc822-time-zone (time)
(let* ((sec (or (car (current-time-zone time)) 0))
(absmin (/ (abs sec) 60)))
(format "%c%02d%02d" (if (< sec 0) ?- ?+) (/ absmin 60) (% absmin 60))))
(defun mail-rfc822-date ()
(let* ((time (current-time))
(s (current-time-string time)))
(string-match "[^ ]+ +\\([^ ]+\\) +\\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\)" s)
(concat (substring s (match-beginning 2) (match-end 2)) " "
(substring s (match-beginning 1) (match-end 1)) " "
(substring s (match-beginning 4) (match-end 4)) " "
(substring s (match-beginning 3) (match-end 3)) " "
(mail-rfc822-time-zone time))))
(provide 'mail-utils)