mirror/emacs
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-11-29 07:58:28 +00:00
Code Issues Releases Activity
ea33ba739a
emacs/lisp/mail/mail-utils.el
Paul Reilly 7fab5ded52 Eliminate compilation warnings due to `rfc822-addresses'. 
(rmail-dont-reply-to): Eliminate `pos' as a free variable for a
warning free compile.
2002-03-20 08:13:21 +00:00

350 lines
13 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; mail-utils.el --- utility functions used both by rmail and rnews
;; Copyright (C) 1985, 2001 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: mail, news
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; Utility functions for mail and netnews handling. These handle fine
;; points of header parsing.
;;; Code:
;;; We require lisp-mode to make sure that lisp-mode-syntax-table has
;;; been initialized.
(require 'lisp-mode)
;;;###autoload
(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)
;; Returns t if file FILE is an Rmail file.
;;;###autoload
(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))))
;;;###autoload
(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)))
;;;###autoload
(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))))))
;;;###autoload
(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))))))
(eval-when-compile (require 'rfc822))
(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)
;; Detect nested comments.
(if (string-match "[ \t]*(\\([^)\\]\\|\\\\.\\|\\\\\n\\)*(" address)
;; Strip nested comments.
(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))
;; Strip non-nested comments an easier way.
(while (setq pos (string-match
;; This doesn't hack rfc822 nested comments
;; `(xyzzy (foo) whinge)' properly. Big deal.
"[ \t]*(\\([^)\\]\\|\\\\.\\|\\\\\n\\)*)"
address))
(setq address (replace-match "" nil nil address 0))))
;; strip surrounding whitespace
(string-match "\\`[ \t\n]*" address)
(setq address (substring address
(match-end 0)
(string-match "[ \t\n]*\\'" address
(match-end 0))))
;; strip `quoted' names (This is supposed to hack `"Foo Bar" <bar@host>')
(setq pos 0)
(while (setq pos (string-match
"\\([ \t]?\\)\\([ \t]*\"\\([^\"\\]\\|\\\\.\\|\\\\\n\\)*\"[ \t\n]*\\)"
address pos))
;; If the next thing is "@", we have "foo bar"@host. Leave it.
(if (and (> (length address) (match-end 0))
(= (aref address (match-end 0)) ?@))
(setq pos (match-end 0))
;; Otherwise discard the "..." part.
(setq address (replace-match "" nil nil address 2))))
;; If this address contains <...>, replace it with just
;; the part between the <...>.
(while (setq pos (string-match "\\(,\\s-*\\|\\`\\)\\([^,]*<\\([^>,:]*\\)>[^,]*\\)\\(\\s-*,\\|\\'\\)"
address))
(setq address (replace-match (match-string 3 address)
nil 'literal address 2)))
address))))
;;; The following piece of ugliness is legacy code. The name was an
;;; unfortunate choice --- a flagrant violation of the Emacs Lisp
;;; coding conventions. `mail-dont-reply-to' would have been
;;; infinitely better. Also, `rmail-dont-reply-to-names' might have
;;; been better named `mail-dont-reply-to-names' and sourced from this
;;; file instead of in rmail.el. Yuck. -pmr
(defun rmail-dont-reply-to (destinations)
"Prune addresses from DESTINATIONS, a list of recipient addresses.
All addresses matching `rmail-dont-reply-to-names' are removed from
the comma-separated list. The pruned list is returned."
(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 "\\|")
"")
(if (and user-mail-address
(not (equal user-mail-address user-login-name)))
(concat (regexp-quote user-mail-address) "\\|")
"")
(concat (regexp-quote user-login-name) "\\>"))))
;; Split up DESTINATIONS and match each element separately.
(let ((start-pos 0) (cur-pos 0)
(case-fold-search t))
(while start-pos
(setq cur-pos (string-match "[,\"]" destinations cur-pos))
(if (and cur-pos (equal (match-string 0 destinations) "\""))
;; Search for matching quote.
(let ((next-pos (string-match "\"" destinations (1+ cur-pos))))
(if next-pos
(setq cur-pos (1+ next-pos))
;; If the open-quote has no close-quote,
;; delete the open-quote to get something well-defined.
;; This case is not valid, but it can happen if things
;; are weird elsewhere.
(setq destinations (concat (substring destinations 0 cur-pos)
(substring destinations (1+ cur-pos))))
(setq cur-pos start-pos)))
(let* ((address (substring destinations start-pos cur-pos))
(naked-address (mail-strip-quoted-names address)))
(if (string-match rmail-dont-reply-to-names naked-address)
(setq destinations (concat (substring destinations 0 start-pos)
(and cur-pos (substring destinations
(1+ cur-pos))))
cur-pos start-pos)
(setq cur-pos (and cur-pos (1+ cur-pos))
start-pos cur-pos))))))
;; get rid of any trailing commas
(let ((pos (string-match "[ ,\t\n]*\\'" destinations)))
(if pos
(setq destinations (substring destinations 0 pos))))
;; remove leading spaces. they bother me.
(if (string-match "\\(\\s \\|,\\)*" destinations)
(substring destinations (match-end 0))
destinations))
;;;###autoload
(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]")))
;; Back up over newline, then trailing spaces or tabs
(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]")))
;; Back up over newline, then trailing spaces or tabs
(forward-char -1)
(skip-chars-backward " \t" opoint)
(buffer-substring-no-properties opoint (point)))))))))
;; Parse a list of tokens separated by commas.
;; It runs from point to the end of the visible part of the buffer.
;; Whitespace before or after tokens is ignored,
;; but whitespace within tokens is kept.
(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))
;; Remove leading and trailing whitespace.
(setq labels (substring labels pos (string-match "[ \t]*$" labels pos)))
;; Change each comma to \|, and flush surrounding whitespace.
(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)
;;; mail-utils.el ends here
Reference in New Issue View Git Blame Copy Permalink