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authorJoseph Arceneaux <jla@gnu.org>1989-10-31 16:00:07 +0000
committerJoseph Arceneaux <jla@gnu.org>1989-10-31 16:00:07 +0000
commitd32fc917b72eb88a71da76de738b6c91f94a702e (patch)
treee3d3283293e51fdd6b426e4221a9b6aade6b2f0e /lisp/mail/mail-utils.el
parentac1c6ea2915c86f32904c13ad6be2db16487003e (diff)
downloademacs-d32fc917b72eb88a71da76de738b6c91f94a702e.tar.gz
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+;; 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)
+
+;; should be in loaddefs
+(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.")
+
+(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)))
+
+(defun mail-fetch-field (field-name &optional last all)
+ "Return the value of the header field FIELD.
+The buffer is expected to be narrowed to just the headers of the message.
+If 2nd arg LAST is non-nil, use the last such field if there are several.
+If 3rd 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))))))))))
+
+;; 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)