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-strip-quoted-names (address)
61 "Delete comments and quoted strings in an address list ADDRESS.
62 Also delete leading/trailing whitespace and replace FOO <BAR> with just BAR.
63 Return a modified address list."
67 (progn (require 'rfc822
)
68 (mapconcat 'identity
(rfc822-addresses address
) ", "))
70 (string-match "\\`[ \t\n]*" address
)
71 ;; strip surrounding whitespace
72 (setq address
(substring address
74 (string-match "[ \t\n]*\\'" address
77 ;; Detect nested comments.
78 (if (string-match "[ \t]*(\\([^)\"\\]\\|\\\\.\\|\\\\\n\\)*(" address
)
79 ;; Strip nested comments.
81 (set-buffer (get-buffer-create " *temp*"))
84 (set-syntax-table lisp-mode-syntax-table
)
86 (while (search-forward "(" nil t
)
88 (skip-chars-backward " \t")
89 (delete-region (point)
93 (error (goto-char (point-max))))
95 (setq address
(buffer-string))
97 ;; Strip non-nested comments an easier way.
98 (while (setq pos
(string-match
99 ;; This doesn't hack rfc822 nested comments
100 ;; `(xyzzy (foo) whinge)' properly. Big deal.
101 "[ \t]*(\\([^)\"\\]\\|\\\\.\\|\\\\\n\\)*)"
104 (mail-string-delete address
105 pos
(match-end 0)))))
107 ;; strip `quoted' names (This is supposed to hack `"Foo Bar" <bar@host>')
109 (while (setq pos
(string-match
110 "[ \t]*\"\\([^\"\\]\\|\\\\.\\|\\\\\n\\)*\"[ \t\n]*"
112 ;; If the next thing is "@", we have "foo bar"@host. Leave it.
113 (if (and (> (length address
) (match-end 0))
114 (= (aref address
(match-end 0)) ?
@))
115 (setq pos
(match-end 0))
117 (mail-string-delete address
118 pos
(match-end 0)))))
119 ;; Retain only part of address in <> delims, if there is such a thing.
120 (while (setq pos
(string-match "\\(,\\s-*\\|\\`\\)[^,]*<\\([^>,]*>\\)"
122 (let ((junk-beg (match-end 1))
123 (junk-end (match-beginning 2))
124 (close (match-end 0)))
125 (setq address
(mail-string-delete address
(1- close
) close
))
126 (setq address
(mail-string-delete address junk-beg junk-end
))))
129 (or (and (boundp 'rmail-default-dont-reply-to-names
)
130 (not (null rmail-default-dont-reply-to-names
)))
131 (setq rmail-default-dont-reply-to-names
"info-"))
133 ; rmail-dont-reply-to-names is defined in loaddefs
134 (defun rmail-dont-reply-to (userids)
135 "Returns string of mail addresses USERIDS sans any recipients
136 that start with matches for `rmail-dont-reply-to-names'.
137 Usenet paths ending in an element that matches are removed also."
138 (if (null rmail-dont-reply-to-names
)
139 (setq rmail-dont-reply-to-names
140 (concat (if rmail-default-dont-reply-to-names
141 (concat rmail-default-dont-reply-to-names
"\\|")
143 (concat (regexp-quote (user-login-name))
145 (let ((match (concat "\\(^\\|,\\)[ \t\n]*\\([^,\n]*!\\|\\)\\("
146 rmail-dont-reply-to-names
150 (while (setq pos
(string-match match userids
))
151 (if (> pos
0) (setq pos
(match-beginning 2)))
153 ;; Delete thru the next comma, plus whitespace after.
154 (if (string-match ",[ \t\n]+" userids
(match-end 0))
160 ;; get rid of any trailing commas
161 (if (setq pos
(string-match "[ ,\t\n]*\\'" userids
))
162 (setq userids
(substring userids
0 pos
)))
163 ;; remove leading spaces. they bother me.
164 (if (string-match "\\s *" userids
)
165 (substring userids
(match-end 0))
169 (defun mail-fetch-field (field-name &optional last all
)
170 "Return the value of the header field FIELD-NAME.
171 The buffer is expected to be narrowed to just the headers of the message.
172 If second arg LAST is non-nil, use the last such field if there are several.
173 If third arg ALL is non-nil, concatenate all such fields with commas between."
175 (goto-char (point-min))
176 (let ((case-fold-search t
)
177 (name (concat "^" (regexp-quote field-name
) "[ \t]*:[ \t]*")))
180 (while (re-search-forward name nil t
)
181 (let ((opoint (point)))
182 (while (progn (forward-line 1)
183 (looking-at "[ \t]")))
184 ;; Back up over newline, then trailing spaces or tabs
186 (skip-chars-backward " \t" opoint
)
187 (setq value
(concat value
188 (if (string= value
"") "" ", ")
189 (buffer-substring-no-properties
191 (and (not (string= value
"")) value
))
192 (if (re-search-forward name nil t
)
194 (if last
(while (re-search-forward name nil t
)))
195 (let ((opoint (point)))
196 (while (progn (forward-line 1)
197 (looking-at "[ \t]")))
198 ;; Back up over newline, then trailing spaces or tabs
200 (skip-chars-backward " \t" opoint
)
201 (buffer-substring-no-properties opoint
(point)))))))))
203 ;; Parse a list of tokens separated by commas.
204 ;; It runs from point to the end of the visible part of the buffer.
205 ;; Whitespace before or after tokens is ignored,
206 ;; but whitespace within tokens is kept.
207 (defun mail-parse-comma-list ()
210 (skip-chars-forward " ")
213 (skip-chars-forward "^,")
214 (skip-chars-backward " ")
216 (cons (buffer-substring beg
(point))
218 (skip-chars-forward "^,")
219 (skip-chars-forward ", "))
222 (defun mail-comma-list-regexp (labels)
224 (setq pos
(or (string-match "[^ \t]" labels
) 0))
225 ;; Remove leading and trailing whitespace.
226 (setq labels
(substring labels pos
(string-match "[ \t]*$" labels pos
)))
227 ;; Change each comma to \|, and flush surrounding whitespace.
228 (while (setq pos
(string-match "[ \t]*,[ \t]*" labels
))
230 (concat (substring labels
0 pos
)
232 (substring labels
(match-end 0))))))
235 (defun mail-rfc822-time-zone (time)
236 (let* ((sec (or (car (current-time-zone time
)) 0))
237 (absmin (/ (abs sec
) 60)))
238 (format "%c%02d%02d" (if (< sec
0) ?- ?
+) (/ absmin
60) (% absmin
60))))
240 (defun mail-rfc822-date ()
241 (let* ((time (current-time))
242 (s (current-time-string time
)))
243 (string-match "[^ ]+ +\\([^ ]+\\) +\\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\)" s
)
244 (concat (substring s
(match-beginning 2) (match-end 2)) " "
245 (substring s
(match-beginning 1) (match-end 1)) " "
246 (substring s
(match-beginning 4) (match-end 4)) " "
247 (substring s
(match-beginning 3) (match-end 3)) " "
248 (mail-rfc822-time-zone time
))))
250 (provide 'mail-utils
)
252 ;;; mail-utils.el ends here