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

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

;; Copyright (C) 1986, 1987, 1990, 2001, 2002, 2003, 2004,
;;   2005, 2006, 2007, 2008 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 3, 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, 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
f2e3589a	3	;; Copyright (C) 1986, 1987, 1990, 2001, 2002, 2003, 2004,
2f043267	4	;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
9750e079	5
4821e2af ER	6	;; Author: Richard Mlynarik <mly@eddie.mit.edu>
4821e2af ER	7	;; Maintainer: FSF
d7b4d18f	8	;; Keywords: mail
4821e2af	9
cedaf3aa RS	10	;; This file is part of GNU Emacs.
	11
	12	;; GNU Emacs is free software; you can redistribute it and/or modify
	13	;; it under the terms of the GNU General Public License as published by
ceaeecb0	14	;; the Free Software Foundation; either version 3, or (at your option)
cedaf3aa RS	15	;; any later version.
	16
	17	;; GNU Emacs is distributed in the hope that it will be useful,
	18	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	;; GNU General Public License for more details.
	21
	22	;; You should have received a copy of the GNU General Public License
b578f267	23	;; along with GNU Emacs; see the file COPYING. If not, write to the
3a35cf56 LK	24	;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
3a35cf56 LK	25	;; Boston, MA 02110-1301, USA.
cedaf3aa	26
d9ecc911 ER	27	;;; Commentary:
	28
	29	;; Support functions for parsing RFC-822 headers, used by mail and news
a1506d29	30	;; modes.
d9ecc911	31
4821e2af ER	32	;;; Code:
4821e2af ER	33
d6b4d749 RS	34	(defvar rfc822-address-start)
	35
	36	;; uses rfc822-address-start free, throws to address
cedaf3aa RS	37	(defun rfc822-bad-address (reason)
	38	(save-restriction
	39	(insert "_^_")
d6b4d749	40	(narrow-to-region rfc822-address-start
cedaf3aa RS	41	(if (re-search-forward "[,;]" nil t)
	42	(max (point-min) (1- (point)))
	43	(point-max)))
	44	;; make the error string be suitable for inclusion in (...)
	45	(let ((losers '("\\" "(" ")" "\n")))
	46	(while losers
	47	(goto-char (point-min))
	48	(while (search-forward (car losers) nil t)
	49	(backward-char 1)
	50	(insert ?\\)
	51	(forward-char 1))
	52	(setq losers (cdr losers))))
	53	(goto-char (point-min)) (insert "(Unparsable address -- "
	54	reason
416916d4	55	": \"")
cedaf3aa RS	56	(goto-char (point-max)) (insert "\")"))
cedaf3aa RS	57	(rfc822-nuke-whitespace)
d6b4d749	58	(throw 'address (buffer-substring rfc822-address-start (point))))
cedaf3aa RS	59
	60	(defun rfc822-nuke-whitespace (&optional leave-space)
	61	(let (ch)
	62	(while (cond ((eobp)
	63	nil)
	64	((= (setq ch (following-char)) ?\()
	65	(forward-char 1)
	66	(while (if (eobp)
	67	(rfc822-bad-address "Unbalanced comment (...)")
	68	(/= (setq ch (following-char)) ?\)))
	69	(cond ((looking-at "[^()\\]+")
	70	(replace-match ""))
	71	((= ch ?\()
	72	(rfc822-nuke-whitespace))
	73	((< (point) (1- (point-max)))
	74	(delete-char 2))
	75	(t
	76	(rfc822-bad-address "orphaned backslash"))))
	77	;; delete remaining "()"
	78	(forward-char -1)
	79	(delete-char 2)
	80	t)
a8eb445b	81	((memq ch '(?\ ?\t ?\n))
cedaf3aa RS	82	(delete-region (point)
	83	(progn (skip-chars-forward " \t\n") (point)))
	84	t)
	85	(t
	86	nil)))
	87	(or (not leave-space)
	88	(eobp)
	89	(bobp)
	90	(= (preceding-char) ?\ )
	91	(insert ?\ ))))
	92
	93	(defun rfc822-looking-at (regex &optional leave-space)
	94	(if (cond ((stringp regex)
	95	(if (looking-at regex)
	96	(progn (goto-char (match-end 0))
	97	t)))
	98	(t
	99	(if (and (not (eobp))
	100	(= (following-char) regex))
	101	(progn (forward-char 1)
	102	t))))
	103	(let ((tem (match-data)))
	104	(rfc822-nuke-whitespace leave-space)
f6b4e0f4	105	(set-match-data tem)
cedaf3aa RS	106	t)))
	107
	108	(defun rfc822-snarf-word ()
	109	;; word is atom \| quoted-string
	110	(cond ((= (following-char) ?\")
	111	;; quoted-string
	112	(or (rfc822-looking-at "\"\\([^\"\\\n]\\\|\\\\.\\\|\\\\\n\\)*\"")
	113	(rfc822-bad-address "Unterminated quoted string")))
55872f3e	114	((rfc822-looking-at "[^][\000-\037 ()<>@,;:\\\".]+")
cedaf3aa RS	115	;; atom
	116	)
	117	(t
	118	(rfc822-bad-address "Rubbish in address"))))
	119
	120	(defun rfc822-snarf-words ()
	121	(rfc822-snarf-word)
	122	(while (rfc822-looking-at ?.)
	123	(rfc822-snarf-word)))
	124
	125	(defun rfc822-snarf-subdomain ()
	126	;; sub-domain is domain-ref \| domain-literal
	127	(cond ((= (following-char) ?\[)
	128	;; domain-ref
	129	(or (rfc822-looking-at "\\[\\([^][\\\n]\\\|\\\\.\\\|\\\\\n\\)*\\]")
	130	(rfc822-bad-address "Unterminated domain literal [...]")))
55872f3e	131	((rfc822-looking-at "[^][\000-\037 ()<>@,;:\\\".]+")
cedaf3aa RS	132	;; domain-literal = atom
	133	)
	134	(t
	135	(rfc822-bad-address "Rubbish in host/domain specification"))))
	136
	137	(defun rfc822-snarf-domain ()
	138	(rfc822-snarf-subdomain)
	139	(while (rfc822-looking-at ?.)
	140	(rfc822-snarf-subdomain)))
	141
	142	(defun rfc822-snarf-frob-list (name separator terminator snarfer
	143	&optional return)
	144	(let ((first t)
	145	(list ())
	146	tem)
	147	(while (cond ((eobp)
	148	(rfc822-bad-address
	149	(format "End of addresses in middle of %s" name)))
	150	((rfc822-looking-at terminator)
	151	nil)
	152	((rfc822-looking-at separator)
	153	;; multiple separators are allowed and do nothing.
	154	(while (rfc822-looking-at separator))
	155	t)
	156	(first
	157	t)
	158	(t
	159	(rfc822-bad-address
	160	(format "Gubbish in middle of %s" name))))
	161	(setq tem (funcall snarfer)
	162	first nil)
	163	(and return tem
	164	(setq list (if (listp tem)
	165	(nconc (reverse tem) list)
	166	(cons tem list)))))
	167	(nreverse list)))
	168
	169	;; return either an address (a string) or a list of addresses
	170	(defun rfc822-addresses-1 (&optional allow-groups)
	171	;; Looking for an rfc822 `address'
	172	;; Either a group (1*word ":" [#mailbox] ";")
	173	;; or a mailbox (addr-spec \| 1*word route-addr)
	174	;; addr-spec is (local-part "@" domain)
	175	;; route-addr is ("<" [1#("@" domain) ":"] addr-spec ">")
	176	;; local-part is (word *("." word))
	177	;; word is (atom \| quoted-string)
	178	;; quoted-string is ("\([^\"\\n]\\|\\.\\|\\\n\)")
	179	;; atom is [^\000-\037\177 ()<>@,;:\".[]]+
	180	;; domain is sub-domain *("." sub-domain)
	181	;; sub-domain is domain-ref \| domain-literal
	182	;; domain-literal is "[" *(dtext \| quoted-pair) "]"
	183	;; dtext is "[^][\\n"
	184	;; domain-ref is atom
d6b4d749	185	(let ((rfc822-address-start (point))
cedaf3aa RS	186	(n 0))
	187	(catch 'address
	188	;; optimize common cases:
	189	;; foo
	190	;; foo.bar@bar.zap
	191	;; followed by "\\'\\\|,\\\|([^()\\]*)\\'"
	192	;; other common cases are:
	193	;; foo bar <foo.bar@baz.zap>
	194	;; "foo bar" <foo.bar@baz.zap>
	195	;; those aren't hacked yet.
55872f3e	196	(if (and (rfc822-looking-at "[^][\000-\037 ()<>@,;:\\\"]+\\(\\\|@[^][\000-\037 ()<>@,;:\\\"]+\\)" t)
cedaf3aa RS	197	(progn (or (eobp)
	198	(rfc822-looking-at ?,))))
	199	(progn
	200	;; rfc822-looking-at may have inserted a space
	201	(or (bobp) (/= (preceding-char) ?\ ) (delete-char -1))
	202	;; relying on the fact that rfc822-looking-at <char>
	203	;; doesn't mung match-data
d6b4d749 RS	204	(throw 'address (buffer-substring rfc822-address-start (match-end 0)))))
d6b4d749 RS	205	(goto-char rfc822-address-start)
cedaf3aa RS	206	(while t
	207	(cond ((and (= n 1) (rfc822-looking-at ?@))
	208	;; local-part@domain
	209	(rfc822-snarf-domain)
	210	(throw 'address
d6b4d749	211	(buffer-substring rfc822-address-start (point))))
cedaf3aa RS	212	((rfc822-looking-at ?:)
	213	(cond ((not allow-groups)
	214	(rfc822-bad-address "A group name may not appear here"))
	215	((= n 0)
	216	(rfc822-bad-address "No name for :...; group")))
	217	;; group
	218	(throw 'address
	219	;; return a list of addresses
	220	(rfc822-snarf-frob-list ":...; group" ?\, ?\;
	221	'rfc822-addresses-1 t)))
	222	((rfc822-looking-at ?<)
	223	(let ((start (point))
	224	(strip t))
	225	(cond ((rfc822-looking-at ?>)
	226	;; empty path
	227	())
	228	((and (not (eobp)) (= (following-char) ?\@))
	229	;; <@foo.bar,@baz:quux@abcd.efg>
	230	(rfc822-snarf-frob-list "<...> address" ?\, ?\:
	231	(function (lambda ()
	232	(if (rfc822-looking-at ?\@)
	233	(rfc822-snarf-domain)
	234	(rfc822-bad-address
	235	"Gubbish in route-addr")))))
	236	(rfc822-snarf-words)
	237	(or (rfc822-looking-at ?@)
	238	(rfc822-bad-address "Malformed <..@..> address"))
	239	(rfc822-snarf-domain)
	240	(setq strip nil))
	241	((progn (rfc822-snarf-words) (rfc822-looking-at ?@))
	242	; allow <foo> (losing unix seems to do this)
	243	(rfc822-snarf-domain)))
	244	(let ((end (point)))
	245	(if (rfc822-looking-at ?\>)
	246	(throw 'address
	247	(buffer-substring (if strip start (1- start))
	248	(if strip end (1+ end))))
	249	(rfc822-bad-address "Unterminated <...> address")))))
55872f3e	250	((looking-at "[^][\000-\037 ()<>@,;:\\.]")
cedaf3aa RS	251	;; this allows "." to be part of the words preceding
	252	;; an addr-spec, since many broken mailers output
	253	;; "Hern K. Herklemeyer III
	254	;; <yank@megadeath.dod.gods-own-country>"
278fc732	255	(let ((again t))
	256	(while again
	257	(or (= n 0) (bobp) (= (preceding-char) ?\ )
	258	(insert ?\ ))
48aefb44	259	(rfc822-snarf-words)
278fc732	260	(setq n (1+ n))
278fc732	261	(setq again (or (rfc822-looking-at ?.)
55872f3e	262	(looking-at "[^][\000-\037 ()<>@,;:\\.]"))))))
cedaf3aa RS	263	((= n 0)
	264	(throw 'address nil))
	265	((= n 1) ; allow "foo" (losing unix seems to do this)
	266	(throw 'address
d6b4d749	267	(buffer-substring rfc822-address-start (point))))
278fc732	268	((> n 1)
	269	(rfc822-bad-address "Missing comma between addresses or badly-formatted address"))
	270	((or (eobp) (= (following-char) ?,))
cedaf3aa RS	271	(rfc822-bad-address "Missing comma or route-spec"))
	272	(t
	273	(rfc822-bad-address "Strange character or missing comma")))))))
	274
a1506d29	275
cedaf3aa	276	(defun rfc822-addresses (header-text)
55872f3e	277	(if (string-match "\\`[ \t]\\([^][\000-\037 ()<>@,;:\\\".]+\\)[ \t]\\'"
cedaf3aa RS	278	header-text)
	279	;; Make very simple case moderately fast.
	280	(list (substring header-text (match-beginning 1) (match-end 1)))
	281	(let ((buf (generate-new-buffer " rfc822")))
	282	(unwind-protect
	283	(save-excursion
	284	(set-buffer buf)
	285	(make-local-variable 'case-fold-search)
	286	(setq case-fold-search nil) ;For speed(?)
	287	(insert header-text)
	288	;; unfold continuation lines
	289	(goto-char (point-min))
	290
	291	(while (re-search-forward "\\([^\\]\\(\\\\\\\\\\)*\\)\n[ \t]" nil t)
	292	(replace-match "\\1 " t))
	293
	294	(goto-char (point-min))
cedaf3aa RS	295	(let ((list ())
cedaf3aa RS	296	tem
d6b4d749 RS	297	rfc822-address-start); this is for rfc822-bad-address
d6b4d749 RS	298	(rfc822-nuke-whitespace)
cedaf3aa	299	(while (not (eobp))
d6b4d749	300	(setq rfc822-address-start (point))
cedaf3aa RS	301	(setq tem
	302	(catch 'address ; this is for rfc822-bad-address
	303	(cond ((rfc822-looking-at ?\,)
	304	nil)
55872f3e	305	((looking-at "[][\000-\037@;:\\.>)]")
cedaf3aa RS	306	(forward-char)
	307	(rfc822-bad-address
	308	(format "Strange character \\%c found"
	309	(preceding-char))))
	310	(t
	311	(rfc822-addresses-1 t)))))
	312	(cond ((null tem))
	313	((stringp tem)
	314	(setq list (cons tem list)))
	315	(t
	316	(setq list (nconc (nreverse tem) list)))))
	317	(nreverse list)))
	318	(and buf (kill-buffer buf))))))
	319
49116ac0 JB	320	(provide 'rfc822)
49116ac0 JB	321
cbee283d	322	;; arch-tag: 5d388a24-e173-40fb-9b8e-85269de44b37
c88ab9ce	323	;;; rfc822.el ends here