1 ;;; morse.el --- convert text to morse code and back -*- coding: utf-8 -*-
3 ;; Copyright (C) 1995, 2001-2011 Free Software Foundation, Inc.
5 ;; Author: Rick Farnbach <rick_farnbach@MENTORG.COM>
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 3 of the License, or
13 ;; (at your option) any later version.
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. If not, see <http://www.gnu.org/licenses/>.
25 ;; Converts text to Morse code and back with M-x morse-region and
26 ;; M-x unmorse-region (though Morse code is no longer official :-().
30 (defvar morse-code
'(("a" .
".-")
83 ;; ligature character?? ("Ch" . "----")
90 ;; Recently standardized
92 "Morse code character set.")
95 (defun morse-region (beg end
)
96 "Convert all text in a given region to morse code."
99 (setq end
(copy-marker end
)))
104 (while (< (point) end
)
105 (setq str
(downcase (buffer-substring (point) (1+ (point)))))
106 (cond ((looking-at "\\s-+")
107 (goto-char (match-end 0))
109 ((setq morse
(assoc str morse-code
))
111 (insert sep
(cdr morse
))
118 (defun unmorse-region (beg end
)
119 "Convert morse coded text in region to ordinary ASCII text."
122 (setq end
(copy-marker end
)))
124 (let (str paren morse
)
126 (while (< (point) end
)
127 (if (null (looking-at "[-.]+"))
129 (setq str
(buffer-substring (match-beginning 0) (match-end 0)))
130 (if (null (setq morse
(rassoc str morse-code
)))
131 (goto-char (match-end 0))
133 (if (string-equal "(" (car morse
))
134 (if (setq paren
(null paren
)) "(" ")")
137 (delete-char 1))))))))
141 ;;; morse.el ends here