-;; Utility functions used both by rmail and rnews
-;; Copyright (C) 1985 Free Software Foundation, Inc.
-
-;; 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-
-(provide 'mail-utils)
-
-;;;###autoload (defvar mail-use-rfc822 nil
-;;;###autoload "*If non-nil, use a full, hairy RFC822 parser on mail addresses.
-;;;###autoload Otherwise, (the default) use a smaller, somewhat faster, and
-;;;###autoload often correct parser.")
-
-(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-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 mail-use-rfc822
- (progn (require 'rfc822)
- (mapconcat 'identity (rfc822-addresses address) ", "))
- (let (pos)
- (string-match "\\`[ \t\n]*" address)
- ;; strip surrounding whitespace
- (setq address (substring address
- (match-end 0)
- (string-match "[ \t\n]*\\'" address
- (match-end 0))))
-
- ;; Detect nested comments.
- (if (string-match "[ \t]*(\\([^)\"\\]\\|\\\\.\\|\\\\\n\\)*(" address)
- ;; Strip nested comments.
- (save-excursion
- (set-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 (forward-sexp 1) (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
- (mail-string-delete address
- pos (match-end 0)))))
-
- ;; strip `quoted' names (This is supposed to hack `"Foo Bar" <bar@host>')
- (setq pos 0)
- (while (setq pos (string-match
- "[ \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))
- (setq address
- (mail-string-delete address
- pos (match-end 0)))))
- ;; Retain only part of address in <> delims, if there is such a thing.
- (while (setq pos (string-match "\\(,\\|\\`\\)[^,]*<\\([^>,]*>\\)"
- address))
- (let ((junk-beg (match-end 1))
- (junk-end (match-beginning 2))
- (close (match-end 0)))
- (setq address (mail-string-delete address (1- close) close))
- (setq address (mail-string-delete address junk-beg junk-end))))
- address)))
-
-(or (and (boundp 'rmail-default-dont-reply-to-names)
- (not (null rmail-default-dont-reply-to-names)))
- (setq rmail-default-dont-reply-to-names "info-"))
-
-; rmail-dont-reply-to-names is defined in loaddefs
-(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-original-login-name))
- "\\>"))))
- (let ((match (concat "\\(^\\|,\\)[ \t\n]*\\([^,\n]*!\\|\\)\\("
- rmail-dont-reply-to-names
- "\\)"))
- (case-fold-search t)
- pos epos)
- (while (setq pos (string-match match userids))
- (if (> pos 0) (setq pos (1+ pos)))
- (setq epos
- (if (string-match "[ \t\n,]+" userids (match-end 0))
- (match-end 0)
- (length userids)))
- (setq userids
- (mail-string-delete
- userids pos epos)))
- ;; get rid of any trailing commas
- (if (setq pos (string-match "[ ,\t\n]*\\'" userids))
- (setq userids (substring userids 0 pos)))
- ;; remove leading spaces. they bother me.
- (if (string-match "\\s *" userids)
- (substring userids (match-end 0))
- userids)))
-\f
-(defun mail-fetch-field (field-name &optional last all)
- "Return the value of the header field FIELD-NAME.
-The buffer is expected to be narrowed to just the headers of the message.
-If second arg LAST is non-nil, use the last such field if there are several.
-If third arg ALL is non-nil, concatenate all such fields with commas between."
- (save-excursion
- (goto-char (point-min))
- (let ((case-fold-search t)
- (name (concat "^" (regexp-quote field-name) "[ \t]*:[ \t]*")))
- (goto-char (point-min))
- (if all
- (let ((value ""))
- (while (re-search-forward name nil t)
- (let ((opoint (point)))
- (while (progn (forward-line 1)
- (looking-at "[ \t]")))
- (setq value (concat value
- (if (string= value "") "" ", ")
- (buffer-substring opoint (1- (point)))))))
- (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]")))
- (buffer-substring opoint (1- (point))))))))))
-\f
-;; 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 " ")
- (while (not (eobp))
- (setq beg (point))
- (skip-chars-forward "^,")
- (skip-chars-backward " ")
- (setq accumulated
- (cons (buffer-substring beg (point))
- accumulated))
- (skip-chars-forward "^,")
- (skip-chars-forward ", "))
- 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)
+;;; 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))
+
+\f
+;;;###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)))))))))
+\f
+;; 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)
+\f
+(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
HCoop / bpt / emacs.git / blobdiff