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- ;;; mail-utils.el --- utility functions used both by rmail and rnews
-
- ;; Copyright (C) 1985 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
- (defvar 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.")
-
- ;; 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))))
-
- (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)
- (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
- (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
- (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 "\\(,\\s-*\\|\\`\\)[^,]*<\\([^>,]*>\\)"
- 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-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 (match-beginning 2)))
- (setq epos
- ;; Delete thru the next comma, plus whitespace after.
- (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)))
-
- ;;;###autoload
- (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]*")))
- (if all
- (let ((value ""))
- (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)
- (setq value (concat value
- (if (string= value "") "" ", ")
- (buffer-substring-no-properties
- opoint (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]")))
- ;; 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 " ")
- (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)
-
- (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
-