1 ;;; mail-utils.el --- utility functions used both by rmail and rnews
3 ;; Copyright (C) 1985 Free Software Foundation, Inc.
6 ;; Keywords: mail, news
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
27 ;; Utility functions for mail and netnews handling. These handle fine
28 ;; points of header parsing.
32 ;;; We require lisp-mode to make sure that lisp-mode-syntax-table has
37 (defvar mail-use-rfc822 nil
"\
38 *If non-nil, use a full, hairy RFC822 parser on mail addresses.
39 Otherwise, (the default) use a smaller, somewhat faster, and
40 often correct parser.")
42 ;; Returns t if file FILE is an Rmail file.
44 (defun mail-file-babyl-p (file)
45 (let ((buf (generate-new-buffer " *rmail-file-p*")))
49 (insert-file-contents file nil
0 100)
50 (looking-at "BABYL OPTIONS:"))
53 (defun mail-string-delete (string start end
)
54 "Returns a string containing all of STRING except the part
55 from START (inclusive) to END (exclusive)."
56 (if (null end
) (substring string
0 start
)
57 (concat (substring string
0 start
)
58 (substring string end nil
))))
60 (defun mail-quote-printable (string &optional wrapper
)
61 "Convert a string to the \"quoted printable\" Q encoding.
62 If the optional argument WRAPPER is non-nil,
63 we add the wrapper characters =3D?ISO-8859-1?Q?....?=3D."
64 (let ((i 0) (result ""))
66 (while (string-match "[?=\"\200-\377]" string i
)
68 (concat result
(substring string i
(match-beginning 0))
69 (upcase (format "=%02x"
70 (aref string
(match-beginning 0))))))
71 (setq i
(match-end 0)))
73 (concat "=3D?ISO-8859-1?Q?"
74 result
(substring string i
)
76 (concat result
(substring string i
))))))
78 (defun mail-unquote-printable-hexdigit (char)
83 (defun mail-unquote-printable (string &optional wrapper
)
84 "Undo the \"quoted printable\" encoding.
85 If the optional argument WRAPPER is non-nil,
86 we expect to find and remove the wrapper characters =3D?ISO-8859-1?Q?....?=3D."
89 (string-match "\\`=3D\\?ISO-8859-1\\?Q\\?\\([^?]*\\)\\?" string
)
90 (setq string
(match-string 1 string
)))
91 (let ((i 0) (result ""))
92 (while (string-match "=\\(..\\)" string i
)
94 (concat result
(substring string i
(match-beginning 0))
96 (+ (* 16 (mail-unquote-printable-hexdigit
97 (aref string
(match-beginning 1))))
98 (mail-unquote-printable-hexdigit
99 (aref string
(1+ (match-beginning 1))))))))
100 (setq i
(match-end 0)))
101 (concat result
(substring string i
)))))
103 (defun mail-strip-quoted-names (address)
104 "Delete comments and quoted strings in an address list ADDRESS.
105 Also delete leading/trailing whitespace and replace FOO <BAR> with just BAR.
106 Return a modified address list."
110 (progn (require 'rfc822
)
111 (mapconcat 'identity
(rfc822-addresses address
) ", "))
113 (string-match "\\`[ \t\n]*" address
)
114 ;; strip surrounding whitespace
115 (setq address
(substring address
117 (string-match "[ \t\n]*\\'" address
120 ;; Detect nested comments.
121 (if (string-match "[ \t]*(\\([^)\\]\\|\\\\.\\|\\\\\n\\)*(" address
)
122 ;; Strip nested comments.
124 (set-buffer (get-buffer-create " *temp*"))
127 (set-syntax-table lisp-mode-syntax-table
)
129 (while (search-forward "(" nil t
)
131 (skip-chars-backward " \t")
132 (delete-region (point)
136 (error (goto-char (point-max))))
138 (setq address
(buffer-string))
140 ;; Strip non-nested comments an easier way.
141 (while (setq pos
(string-match
142 ;; This doesn't hack rfc822 nested comments
143 ;; `(xyzzy (foo) whinge)' properly. Big deal.
144 "[ \t]*(\\([^)\\]\\|\\\\.\\|\\\\\n\\)*)"
147 (mail-string-delete address
148 pos
(match-end 0)))))
150 ;; strip `quoted' names (This is supposed to hack `"Foo Bar" <bar@host>')
152 (while (setq pos
(string-match
153 "[ \t]*\"\\([^\"\\]\\|\\\\.\\|\\\\\n\\)*\"[ \t\n]*"
155 ;; If the next thing is "@", we have "foo bar"@host. Leave it.
156 (if (and (> (length address
) (match-end 0))
157 (= (aref address
(match-end 0)) ?
@))
158 (setq pos
(match-end 0))
160 (mail-string-delete address
161 pos
(match-end 0)))))
162 ;; Retain only part of address in <> delims, if there is such a thing.
163 (while (setq pos
(string-match "\\(,\\s-*\\|\\`\\)[^,]*<\\([^>,]*>\\)"
165 (let ((junk-beg (match-end 1))
166 (junk-end (match-beginning 2))
167 (close (match-end 0)))
168 (setq address
(mail-string-delete address
(1- close
) close
))
169 (setq address
(mail-string-delete address junk-beg junk-end
))))
172 (or (and (boundp 'rmail-default-dont-reply-to-names
)
173 (not (null rmail-default-dont-reply-to-names
)))
174 (setq rmail-default-dont-reply-to-names
"info-"))
176 ; rmail-dont-reply-to-names is defined in loaddefs
177 (defun rmail-dont-reply-to (userids)
178 "Returns string of mail addresses USERIDS sans any recipients
179 that start with matches for `rmail-dont-reply-to-names'.
180 Usenet paths ending in an element that matches are removed also."
181 (if (null rmail-dont-reply-to-names
)
182 (setq rmail-dont-reply-to-names
183 (concat (if rmail-default-dont-reply-to-names
184 (concat rmail-default-dont-reply-to-names
"\\|")
186 (concat (regexp-quote (user-login-name))
188 (let ((match (concat "\\(^\\|,\\)[ \t\n]*\\([^,\n]*[!<]\\|\\)\\("
189 rmail-dont-reply-to-names
190 "\\|[^\,.<]*<\\(" rmail-dont-reply-to-names
"\\)"
194 (while (setq pos
(string-match match userids
))
195 (if (> pos
0) (setq pos
(match-beginning 2)))
197 ;; Delete thru the next comma, plus whitespace after.
198 (if (string-match ",[ \t\n]*" userids
(match-end 0))
204 ;; get rid of any trailing commas
205 (if (setq pos
(string-match "[ ,\t\n]*\\'" userids
))
206 (setq userids
(substring userids
0 pos
)))
207 ;; remove leading spaces. they bother me.
208 (if (string-match "\\s *" userids
)
209 (substring userids
(match-end 0))
213 (defun mail-fetch-field (field-name &optional last all list
)
214 "Return the value of the header field FIELD-NAME.
215 The buffer is expected to be narrowed to just the headers of the message.
216 If second arg LAST is non-nil, use the last such field if there are several.
217 If third arg ALL is non-nil, concatenate all such fields with commas between.
218 If 4th arg LIST is non-nil, return a list of all such fields."
220 (goto-char (point-min))
221 (let ((case-fold-search t
)
222 (name (concat "^" (regexp-quote field-name
) "[ \t]*:[ \t]*")))
224 (let ((value (if all
"")))
225 (while (re-search-forward name nil t
)
226 (let ((opoint (point)))
227 (while (progn (forward-line 1)
228 (looking-at "[ \t]")))
229 ;; Back up over newline, then trailing spaces or tabs
231 (skip-chars-backward " \t" opoint
)
233 (setq value
(cons (buffer-substring-no-properties
236 (setq value
(concat value
237 (if (string= value
"") "" ", ")
238 (buffer-substring-no-properties
242 (and (not (string= value
"")) value
)))
243 (if (re-search-forward name nil t
)
245 (if last
(while (re-search-forward name nil t
)))
246 (let ((opoint (point)))
247 (while (progn (forward-line 1)
248 (looking-at "[ \t]")))
249 ;; Back up over newline, then trailing spaces or tabs
251 (skip-chars-backward " \t" opoint
)
252 (buffer-substring-no-properties opoint
(point)))))))))
254 ;; Parse a list of tokens separated by commas.
255 ;; It runs from point to the end of the visible part of the buffer.
256 ;; Whitespace before or after tokens is ignored,
257 ;; but whitespace within tokens is kept.
258 (defun mail-parse-comma-list ()
261 (skip-chars-forward " ")
264 (skip-chars-forward "^,")
265 (skip-chars-backward " ")
267 (cons (buffer-substring beg
(point))
269 (skip-chars-forward "^,")
270 (skip-chars-forward ", "))
273 (defun mail-comma-list-regexp (labels)
275 (setq pos
(or (string-match "[^ \t]" labels
) 0))
276 ;; Remove leading and trailing whitespace.
277 (setq labels
(substring labels pos
(string-match "[ \t]*$" labels pos
)))
278 ;; Change each comma to \|, and flush surrounding whitespace.
279 (while (setq pos
(string-match "[ \t]*,[ \t]*" labels
))
281 (concat (substring labels
0 pos
)
283 (substring labels
(match-end 0))))))
286 (defun mail-rfc822-time-zone (time)
287 (let* ((sec (or (car (current-time-zone time
)) 0))
288 (absmin (/ (abs sec
) 60)))
289 (format "%c%02d%02d" (if (< sec
0) ?- ?
+) (/ absmin
60) (% absmin
60))))
291 (defun mail-rfc822-date ()
292 (let* ((time (current-time))
293 (s (current-time-string time
)))
294 (string-match "[^ ]+ +\\([^ ]+\\) +\\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\)" s
)
295 (concat (substring s
(match-beginning 2) (match-end 2)) " "
296 (substring s
(match-beginning 1) (match-end 1)) " "
297 (substring s
(match-beginning 4) (match-end 4)) " "
298 (substring s
(match-beginning 3) (match-end 3)) " "
299 (mail-rfc822-time-zone time
))))
301 (provide 'mail-utils
)
303 ;;; mail-utils.el ends here