[bpt/emacs.git] / lisp / mail / rfc822.el

;;; rfc822.el --- hairy rfc822 parser for mail and news and suchlike

;; Copyright (C) 1986, 87, 1990 Free Software Foundation, Inc.

;; Author: Richard Mlynarik <mly@eddie.mit.edu>
;; Maintainer: FSF
;; Keywords: mail

;; 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:

;; Support functions for parsing RFC-822 headers, used by mail and news
;; modes.

;;; Code:

(defvar rfc822-address-start)

;; uses rfc822-address-start free, throws to address
(defun rfc822-bad-address (reason)
  (save-restriction
    (insert "_^_")
    (narrow-to-region rfc822-address-start
		      (if (re-search-forward "[,;]" nil t)
			  (max (point-min) (1- (point)))
			(point-max)))
    ;; make the error string be suitable for inclusion in (...)
    (let ((losers '("\\" "(" ")" "\n")))
      (while losers
	(goto-char (point-min))
	(while (search-forward (car losers) nil t)
	  (backward-char 1)
	  (insert ?\\)
	  (forward-char 1))
	(setq losers (cdr losers))))
    (goto-char (point-min)) (insert "(Unparsable address -- "
				    reason
				    ": \"")
    (goto-char (point-max)) (insert "\")"))
  (rfc822-nuke-whitespace)
  (throw 'address (buffer-substring rfc822-address-start (point))))

(defun rfc822-nuke-whitespace (&optional leave-space)
  (let (ch)
    (while (cond ((eobp)
		  nil)
		 ((= (setq ch (following-char)) ?\()
		  (forward-char 1)
		  (while (if (eobp)
			     (rfc822-bad-address "Unbalanced comment (...)")
			   (/= (setq ch (following-char)) ?\)))
		    (cond ((looking-at "[^()\\]+")
			   (replace-match ""))
			  ((= ch ?\()
			   (rfc822-nuke-whitespace))
			  ((< (point) (1- (point-max)))
			   (delete-char 2))
			  (t
			   (rfc822-bad-address "orphaned backslash"))))
		  ;; delete remaining "()"
		  (forward-char -1)
		  (delete-char 2)
		  t)
		 ((memq ch '(?\  ?\t ?\n))
		  (delete-region (point)
				 (progn (skip-chars-forward " \t\n") (point)))
		  t)
		 (t
		  nil)))
    (or (not leave-space)
	(eobp)
	(bobp)
	(= (preceding-char) ?\ )
	(insert ?\ ))))

(defun rfc822-looking-at (regex &optional leave-space)
  (if (cond ((stringp regex)
	     (if (looking-at regex)
		 (progn (goto-char (match-end 0))
			t)))
	    (t
	     (if (and (not (eobp))
		      (= (following-char) regex))
		 (progn (forward-char 1)
			t))))
      (let ((tem (match-data)))
	(rfc822-nuke-whitespace leave-space)
	(set-match-data tem)
	t)))

(defun rfc822-snarf-word ()
  ;; word is atom | quoted-string
  (cond ((= (following-char) ?\")
	 ;; quoted-string
	 (or (rfc822-looking-at "\"\\([^\"\\\n]\\|\\\\.\\|\\\\\n\\)*\"")
	     (rfc822-bad-address "Unterminated quoted string")))
	((rfc822-looking-at "[^][\000-\037 ()<>@,;:\\\".]+")
	 ;; atom
	 )
	(t
	 (rfc822-bad-address "Rubbish in address"))))

(defun rfc822-snarf-words ()
  (rfc822-snarf-word)
  (while (rfc822-looking-at ?.)
    (rfc822-snarf-word)))

(defun rfc822-snarf-subdomain ()
  ;; sub-domain is domain-ref | domain-literal
  (cond ((= (following-char) ?\[)
	 ;; domain-ref
	 (or (rfc822-looking-at "\\[\\([^][\\\n]\\|\\\\.\\|\\\\\n\\)*\\]")
	     (rfc822-bad-address "Unterminated domain literal [...]")))
	((rfc822-looking-at "[^][\000-\037 ()<>@,;:\\\".]+")
	 ;; domain-literal = atom
	 )
	(t
	 (rfc822-bad-address "Rubbish in host/domain specification"))))

(defun rfc822-snarf-domain ()
  (rfc822-snarf-subdomain)
  (while (rfc822-looking-at ?.)
    (rfc822-snarf-subdomain)))

(defun rfc822-snarf-frob-list (name separator terminator snarfer
				    &optional return)
  (let ((first t)
	(list ())
	tem)
    (while (cond ((eobp)
		  (rfc822-bad-address
		    (format "End of addresses in middle of %s" name)))
		 ((rfc822-looking-at terminator)
		  nil)
		 ((rfc822-looking-at separator)
		  ;; multiple separators are allowed and do nothing.
		  (while (rfc822-looking-at separator))
		  t)
		 (first
		  t)
		 (t
		  (rfc822-bad-address
		    (format "Gubbish in middle of %s" name))))
      (setq tem (funcall snarfer)
	    first nil)
      (and return tem
	   (setq list (if (listp tem)
			  (nconc (reverse tem) list)
			  (cons tem list)))))
    (nreverse list)))

;; return either an address (a string) or a list of addresses
(defun rfc822-addresses-1 (&optional allow-groups)
  ;; Looking for an rfc822 `address'
  ;; Either a group (1*word ":" [#mailbox] ";")
  ;; or a mailbox (addr-spec | 1*word route-addr)
  ;;  addr-spec is (local-part "@" domain)
  ;;  route-addr is ("<" [1#("@" domain) ":"] addr-spec ">")
  ;;  local-part is (word *("." word))
  ;;  word is (atom | quoted-string)
  ;;  quoted-string is ("\([^\"\\n]\|\\.\|\\\n\)")
  ;;  atom is [^\000-\037\177 ()<>@,;:\".[]]+
  ;;  domain is sub-domain *("." sub-domain)
  ;;  sub-domain is domain-ref | domain-literal
  ;;  domain-literal is  "[" *(dtext | quoted-pair) "]"
  ;;  dtext is "[^][\\n"
  ;;  domain-ref is atom
  (let ((rfc822-address-start (point))
	(n 0))
    (catch 'address
      ;; optimize common cases:
      ;;  foo
      ;;  foo.bar@bar.zap
      ;; followed by "\\'\\|,\\|([^()\\]*)\\'"
      ;; other common cases are:
      ;;  foo bar <foo.bar@baz.zap>
      ;;  "foo bar" <foo.bar@baz.zap>
      ;;  those aren't hacked yet.
      (if (and (rfc822-looking-at "[^][\000-\037 ()<>@,;:\\\"]+\\(\\|@[^][\000-\037 ()<>@,;:\\\"]+\\)" t)
	       (progn (or (eobp)
			  (rfc822-looking-at ?,))))
	  (progn
	    ;; rfc822-looking-at may have inserted a space
	    (or (bobp) (/= (preceding-char) ?\ ) (delete-char -1))
	    ;; relying on the fact that rfc822-looking-at <char>
	    ;;  doesn't mung match-data
	    (throw 'address (buffer-substring rfc822-address-start (match-end 0)))))
      (goto-char rfc822-address-start)
      (while t
	(cond ((and (= n 1) (rfc822-looking-at ?@))
	       ;; local-part@domain
	       (rfc822-snarf-domain)
	       (throw 'address
		 (buffer-substring rfc822-address-start (point))))
	      ((rfc822-looking-at ?:)
	       (cond ((not allow-groups)
		      (rfc822-bad-address "A group name may not appear here"))
		     ((= n 0)
		      (rfc822-bad-address "No name for :...; group")))
	       ;; group
	       (throw 'address
		 ;; return a list of addresses
		 (rfc822-snarf-frob-list ":...; group" ?\, ?\;
					 'rfc822-addresses-1 t)))
	      ((rfc822-looking-at ?<)
	       (let ((start (point))
		     (strip t))
		 (cond ((rfc822-looking-at ?>)
			;; empty path
			())
		       ((and (not (eobp)) (= (following-char) ?\@))
			;; <@foo.bar,@baz:quux@abcd.efg>
			(rfc822-snarf-frob-list "<...> address" ?\, ?\:
			  (function (lambda ()
				      (if (rfc822-looking-at ?\@)
					  (rfc822-snarf-domain)
					(rfc822-bad-address
					  "Gubbish in route-addr")))))
			(rfc822-snarf-words)
			(or (rfc822-looking-at ?@)
			    (rfc822-bad-address "Malformed <..@..> address"))
			(rfc822-snarf-domain)
			(setq strip nil))
		       ((progn (rfc822-snarf-words) (rfc822-looking-at ?@))
			; allow <foo> (losing unix seems to do this)
			(rfc822-snarf-domain)))
		 (let ((end (point)))
		   (if (rfc822-looking-at ?\>)
		       (throw 'address
			 (buffer-substring (if strip start (1- start))
					   (if strip end (1+ end))))
		     (rfc822-bad-address "Unterminated <...> address")))))
	      ((looking-at "[^][\000-\037 ()<>@,;:\\.]")
	       ;; this allows "." to be part of the words preceding
	       ;; an addr-spec, since many broken mailers output
	       ;; "Hern K. Herklemeyer III
	       ;;   <yank@megadeath.dod.gods-own-country>"
               (let ((again t))
                 (while again
                   (or (= n 0) (bobp) (= (preceding-char) ?\ )
                       (insert ?\ ))
                   (rfc822-snarf-words)
                   (setq n (1+ n))
                   (setq again (or (rfc822-looking-at ?.)
                                   (looking-at "[^][\000-\037 ()<>@,;:\\.]"))))))
	      ((= n 0)
	       (throw 'address nil))
	      ((= n 1) ; allow "foo" (losing unix seems to do this)
	       (throw 'address
		 (buffer-substring rfc822-address-start (point))))
              ((> n 1)
               (rfc822-bad-address "Missing comma between addresses or badly-formatted address"))
	      ((or (eobp) (= (following-char) ?,))
	       (rfc822-bad-address "Missing comma or route-spec"))
	      (t
	       (rfc822-bad-address "Strange character or missing comma")))))))


(defun rfc822-addresses (header-text)
  (if (string-match "\\`[ \t]*\\([^][\000-\037 ()<>@,;:\\\".]+\\)[ \t]*\\'"
                    header-text)
      ;; Make very simple case moderately fast.
      (list (substring header-text (match-beginning 1) (match-end 1)))
    (let ((buf (generate-new-buffer " rfc822")))
      (unwind-protect
	(save-excursion
	  (set-buffer buf)
	  (make-local-variable 'case-fold-search)
	  (setq case-fold-search nil)	;For speed(?)
	  (insert header-text)
	  ;; unfold continuation lines
	  (goto-char (point-min))

	  (while (re-search-forward "\\([^\\]\\(\\\\\\\\\\)*\\)\n[ \t]" nil t)
	    (replace-match "\\1 " t))

	  (goto-char (point-min))
	  (let ((list ())
		tem
		rfc822-address-start); this is for rfc822-bad-address
	    (rfc822-nuke-whitespace)
	    (while (not (eobp))
	      (setq rfc822-address-start (point))
	      (setq tem
		    (catch 'address ; this is for rfc822-bad-address
		      (cond ((rfc822-looking-at ?\,)
			     nil)
			    ((looking-at "[][\000-\037@;:\\.>)]")
			     (forward-char)
			     (rfc822-bad-address
			       (format "Strange character \\%c found"
				       (preceding-char))))
			    (t
			     (rfc822-addresses-1 t)))))
	      (cond ((null tem))
		    ((stringp tem)
		     (setq list (cons tem list)))
		    (t
		     (setq list (nconc (nreverse tem) list)))))
	    (nreverse list)))
      (and buf (kill-buffer buf))))))

(provide 'rfc822)

;;; arch-tag: 5d388a24-e173-40fb-9b8e-85269de44b37
;;; rfc822.el ends here
Commit	Line	Data
c88ab9ce ER	1	;;; rfc822.el --- hairy rfc822 parser for mail and news and suchlike
c88ab9ce ER	2
9750e079 ER	3	;; Copyright (C) 1986, 87, 1990 Free Software Foundation, Inc.
9750e079 ER	4
4821e2af ER	5	;; Author: Richard Mlynarik <mly@eddie.mit.edu>
4821e2af ER	6	;; Maintainer: FSF
d7b4d18f	7	;; Keywords: mail
4821e2af	8
cedaf3aa RS	9	;; This file is part of GNU Emacs.
	10
	11	;; GNU Emacs is free software; you can redistribute it and/or modify
	12	;; it under the terms of the GNU General Public License as published by
29add8b9	13	;; the Free Software Foundation; either version 2, or (at your option)
cedaf3aa RS	14	;; any later version.
	15
	16	;; GNU Emacs is distributed in the hope that it will be useful,
	17	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	;; GNU General Public License for more details.
	20
	21	;; You should have received a copy of the GNU General Public License
b578f267 EN	22	;; along with GNU Emacs; see the file COPYING. If not, write to the
	23	;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	24	;; Boston, MA 02111-1307, USA.
cedaf3aa	25
d9ecc911 ER	26	;;; Commentary:
	27
	28	;; Support functions for parsing RFC-822 headers, used by mail and news
a1506d29	29	;; modes.
d9ecc911	30
4821e2af ER	31	;;; Code:
4821e2af ER	32
d6b4d749 RS	33	(defvar rfc822-address-start)
	34
	35	;; uses rfc822-address-start free, throws to address
cedaf3aa RS	36	(defun rfc822-bad-address (reason)
	37	(save-restriction
	38	(insert "_^_")
d6b4d749	39	(narrow-to-region rfc822-address-start
cedaf3aa RS	40	(if (re-search-forward "[,;]" nil t)
	41	(max (point-min) (1- (point)))
	42	(point-max)))
	43	;; make the error string be suitable for inclusion in (...)
	44	(let ((losers '("\\" "(" ")" "\n")))
	45	(while losers
	46	(goto-char (point-min))
	47	(while (search-forward (car losers) nil t)
	48	(backward-char 1)
	49	(insert ?\\)
	50	(forward-char 1))
	51	(setq losers (cdr losers))))
	52	(goto-char (point-min)) (insert "(Unparsable address -- "
	53	reason
416916d4	54	": \"")
cedaf3aa RS	55	(goto-char (point-max)) (insert "\")"))
cedaf3aa RS	56	(rfc822-nuke-whitespace)
d6b4d749	57	(throw 'address (buffer-substring rfc822-address-start (point))))
cedaf3aa RS	58
	59	(defun rfc822-nuke-whitespace (&optional leave-space)
	60	(let (ch)
	61	(while (cond ((eobp)
	62	nil)
	63	((= (setq ch (following-char)) ?\()
	64	(forward-char 1)
	65	(while (if (eobp)
	66	(rfc822-bad-address "Unbalanced comment (...)")
	67	(/= (setq ch (following-char)) ?\)))
	68	(cond ((looking-at "[^()\\]+")
	69	(replace-match ""))
	70	((= ch ?\()
	71	(rfc822-nuke-whitespace))
	72	((< (point) (1- (point-max)))
	73	(delete-char 2))
	74	(t
	75	(rfc822-bad-address "orphaned backslash"))))
	76	;; delete remaining "()"
	77	(forward-char -1)
	78	(delete-char 2)
	79	t)
a8eb445b	80	((memq ch '(?\ ?\t ?\n))
cedaf3aa RS	81	(delete-region (point)
	82	(progn (skip-chars-forward " \t\n") (point)))
	83	t)
	84	(t
	85	nil)))
	86	(or (not leave-space)
	87	(eobp)
	88	(bobp)
	89	(= (preceding-char) ?\ )
	90	(insert ?\ ))))
	91
	92	(defun rfc822-looking-at (regex &optional leave-space)
	93	(if (cond ((stringp regex)
	94	(if (looking-at regex)
	95	(progn (goto-char (match-end 0))
	96	t)))
	97	(t
	98	(if (and (not (eobp))
	99	(= (following-char) regex))
	100	(progn (forward-char 1)
	101	t))))
	102	(let ((tem (match-data)))
	103	(rfc822-nuke-whitespace leave-space)
f6b4e0f4	104	(set-match-data tem)
cedaf3aa RS	105	t)))
	106
	107	(defun rfc822-snarf-word ()
	108	;; word is atom \| quoted-string
	109	(cond ((= (following-char) ?\")
	110	;; quoted-string
	111	(or (rfc822-looking-at "\"\\([^\"\\\n]\\\|\\\\.\\\|\\\\\n\\)*\"")
	112	(rfc822-bad-address "Unterminated quoted string")))
55872f3e	113	((rfc822-looking-at "[^][\000-\037 ()<>@,;:\\\".]+")
cedaf3aa RS	114	;; atom
	115	)
	116	(t
	117	(rfc822-bad-address "Rubbish in address"))))
	118
	119	(defun rfc822-snarf-words ()
	120	(rfc822-snarf-word)
	121	(while (rfc822-looking-at ?.)
	122	(rfc822-snarf-word)))
	123
	124	(defun rfc822-snarf-subdomain ()
	125	;; sub-domain is domain-ref \| domain-literal
	126	(cond ((= (following-char) ?\[)
	127	;; domain-ref
	128	(or (rfc822-looking-at "\\[\\([^][\\\n]\\\|\\\\.\\\|\\\\\n\\)*\\]")
	129	(rfc822-bad-address "Unterminated domain literal [...]")))
55872f3e	130	((rfc822-looking-at "[^][\000-\037 ()<>@,;:\\\".]+")
cedaf3aa RS	131	;; domain-literal = atom
	132	)
	133	(t
	134	(rfc822-bad-address "Rubbish in host/domain specification"))))
	135
	136	(defun rfc822-snarf-domain ()
	137	(rfc822-snarf-subdomain)
	138	(while (rfc822-looking-at ?.)
	139	(rfc822-snarf-subdomain)))
	140
	141	(defun rfc822-snarf-frob-list (name separator terminator snarfer
	142	&optional return)
	143	(let ((first t)
	144	(list ())
	145	tem)
	146	(while (cond ((eobp)
	147	(rfc822-bad-address
	148	(format "End of addresses in middle of %s" name)))
	149	((rfc822-looking-at terminator)
	150	nil)
	151	((rfc822-looking-at separator)
	152	;; multiple separators are allowed and do nothing.
	153	(while (rfc822-looking-at separator))
	154	t)
	155	(first
	156	t)
	157	(t
	158	(rfc822-bad-address
	159	(format "Gubbish in middle of %s" name))))
	160	(setq tem (funcall snarfer)
	161	first nil)
	162	(and return tem
	163	(setq list (if (listp tem)
	164	(nconc (reverse tem) list)
	165	(cons tem list)))))
	166	(nreverse list)))
	167
	168	;; return either an address (a string) or a list of addresses
	169	(defun rfc822-addresses-1 (&optional allow-groups)
	170	;; Looking for an rfc822 `address'
	171	;; Either a group (1*word ":" [#mailbox] ";")
	172	;; or a mailbox (addr-spec \| 1*word route-addr)
	173	;; addr-spec is (local-part "@" domain)
	174	;; route-addr is ("<" [1#("@" domain) ":"] addr-spec ">")
	175	;; local-part is (word *("." word))
	176	;; word is (atom \| quoted-string)
	177	;; quoted-string is ("\([^\"\\n]\\|\\.\\|\\\n\)")
	178	;; atom is [^\000-\037\177 ()<>@,;:\".[]]+
	179	;; domain is sub-domain *("." sub-domain)
	180	;; sub-domain is domain-ref \| domain-literal
	181	;; domain-literal is "[" *(dtext \| quoted-pair) "]"
	182	;; dtext is "[^][\\n"
	183	;; domain-ref is atom
d6b4d749	184	(let ((rfc822-address-start (point))
cedaf3aa RS	185	(n 0))
	186	(catch 'address
	187	;; optimize common cases:
	188	;; foo
	189	;; foo.bar@bar.zap
	190	;; followed by "\\'\\\|,\\\|([^()\\]*)\\'"
	191	;; other common cases are:
	192	;; foo bar <foo.bar@baz.zap>
	193	;; "foo bar" <foo.bar@baz.zap>
	194	;; those aren't hacked yet.
55872f3e	195	(if (and (rfc822-looking-at "[^][\000-\037 ()<>@,;:\\\"]+\\(\\\|@[^][\000-\037 ()<>@,;:\\\"]+\\)" t)
cedaf3aa RS	196	(progn (or (eobp)
	197	(rfc822-looking-at ?,))))
	198	(progn
	199	;; rfc822-looking-at may have inserted a space
	200	(or (bobp) (/= (preceding-char) ?\ ) (delete-char -1))
	201	;; relying on the fact that rfc822-looking-at <char>
	202	;; doesn't mung match-data
d6b4d749 RS	203	(throw 'address (buffer-substring rfc822-address-start (match-end 0)))))
d6b4d749 RS	204	(goto-char rfc822-address-start)
cedaf3aa RS	205	(while t
	206	(cond ((and (= n 1) (rfc822-looking-at ?@))
	207	;; local-part@domain
	208	(rfc822-snarf-domain)
	209	(throw 'address
d6b4d749	210	(buffer-substring rfc822-address-start (point))))
cedaf3aa RS	211	((rfc822-looking-at ?:)
	212	(cond ((not allow-groups)
	213	(rfc822-bad-address "A group name may not appear here"))
	214	((= n 0)
	215	(rfc822-bad-address "No name for :...; group")))
	216	;; group
	217	(throw 'address
	218	;; return a list of addresses
	219	(rfc822-snarf-frob-list ":...; group" ?\, ?\;
	220	'rfc822-addresses-1 t)))
	221	((rfc822-looking-at ?<)
	222	(let ((start (point))
	223	(strip t))
	224	(cond ((rfc822-looking-at ?>)
	225	;; empty path
	226	())
	227	((and (not (eobp)) (= (following-char) ?\@))
	228	;; <@foo.bar,@baz:quux@abcd.efg>
	229	(rfc822-snarf-frob-list "<...> address" ?\, ?\:
	230	(function (lambda ()
	231	(if (rfc822-looking-at ?\@)
	232	(rfc822-snarf-domain)
	233	(rfc822-bad-address
	234	"Gubbish in route-addr")))))
	235	(rfc822-snarf-words)
	236	(or (rfc822-looking-at ?@)
	237	(rfc822-bad-address "Malformed <..@..> address"))
	238	(rfc822-snarf-domain)
	239	(setq strip nil))
	240	((progn (rfc822-snarf-words) (rfc822-looking-at ?@))
	241	; allow <foo> (losing unix seems to do this)
	242	(rfc822-snarf-domain)))
	243	(let ((end (point)))
	244	(if (rfc822-looking-at ?\>)
	245	(throw 'address
	246	(buffer-substring (if strip start (1- start))
	247	(if strip end (1+ end))))
	248	(rfc822-bad-address "Unterminated <...> address")))))
55872f3e	249	((looking-at "[^][\000-\037 ()<>@,;:\\.]")
cedaf3aa RS	250	;; this allows "." to be part of the words preceding
	251	;; an addr-spec, since many broken mailers output
	252	;; "Hern K. Herklemeyer III
	253	;; <yank@megadeath.dod.gods-own-country>"
278fc732	254	(let ((again t))
	255	(while again
	256	(or (= n 0) (bobp) (= (preceding-char) ?\ )
	257	(insert ?\ ))
48aefb44	258	(rfc822-snarf-words)
278fc732	259	(setq n (1+ n))
278fc732	260	(setq again (or (rfc822-looking-at ?.)
55872f3e	261	(looking-at "[^][\000-\037 ()<>@,;:\\.]"))))))
cedaf3aa RS	262	((= n 0)
	263	(throw 'address nil))
	264	((= n 1) ; allow "foo" (losing unix seems to do this)
	265	(throw 'address
d6b4d749	266	(buffer-substring rfc822-address-start (point))))
278fc732	267	((> n 1)
	268	(rfc822-bad-address "Missing comma between addresses or badly-formatted address"))
	269	((or (eobp) (= (following-char) ?,))
cedaf3aa RS	270	(rfc822-bad-address "Missing comma or route-spec"))
	271	(t
	272	(rfc822-bad-address "Strange character or missing comma")))))))
	273
a1506d29	274
cedaf3aa	275	(defun rfc822-addresses (header-text)
55872f3e	276	(if (string-match "\\`[ \t]\\([^][\000-\037 ()<>@,;:\\\".]+\\)[ \t]\\'"
cedaf3aa RS	277	header-text)
	278	;; Make very simple case moderately fast.
	279	(list (substring header-text (match-beginning 1) (match-end 1)))
	280	(let ((buf (generate-new-buffer " rfc822")))
	281	(unwind-protect
	282	(save-excursion
	283	(set-buffer buf)
	284	(make-local-variable 'case-fold-search)
	285	(setq case-fold-search nil) ;For speed(?)
	286	(insert header-text)
	287	;; unfold continuation lines
	288	(goto-char (point-min))
	289
	290	(while (re-search-forward "\\([^\\]\\(\\\\\\\\\\)*\\)\n[ \t]" nil t)
	291	(replace-match "\\1 " t))
	292
	293	(goto-char (point-min))
cedaf3aa RS	294	(let ((list ())
cedaf3aa RS	295	tem
d6b4d749 RS	296	rfc822-address-start); this is for rfc822-bad-address
d6b4d749 RS	297	(rfc822-nuke-whitespace)
cedaf3aa	298	(while (not (eobp))
d6b4d749	299	(setq rfc822-address-start (point))
cedaf3aa RS	300	(setq tem
	301	(catch 'address ; this is for rfc822-bad-address
	302	(cond ((rfc822-looking-at ?\,)
	303	nil)
55872f3e	304	((looking-at "[][\000-\037@;:\\.>)]")
cedaf3aa RS	305	(forward-char)
	306	(rfc822-bad-address
	307	(format "Strange character \\%c found"
	308	(preceding-char))))
	309	(t
	310	(rfc822-addresses-1 t)))))
	311	(cond ((null tem))
	312	((stringp tem)
	313	(setq list (cons tem list)))
	314	(t
	315	(setq list (nconc (nreverse tem) list)))))
	316	(nreverse list)))
	317	(and buf (kill-buffer buf))))))
	318
49116ac0 JB	319	(provide 'rfc822)
49116ac0 JB	320
ab5796a9	321	;;; arch-tag: 5d388a24-e173-40fb-9b8e-85269de44b37
c88ab9ce	322	;;; rfc822.el ends here