2001-07-16 09:10:19 +00:00
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;;; morse.el --- convert text to morse code and back
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1995-11-25 05:42:30 +00:00
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;; Copyright (C) 1995 Free Software Foundation, Inc.
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;; Author: Rick Farnbach <rick_farnbach@MENTORG.COM>
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2000-10-08 17:37:14 +00:00
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;; Keywords: games
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1995-11-25 05:42:30 +00:00
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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1996-01-14 07:34:30 +00:00
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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1995-11-25 05:42:30 +00:00
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2000-10-08 17:37:14 +00:00
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;;; Commentary:
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;; Converts text to Morse code and back with M-x morese-region and
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;; M-x unmorse-region (though Morse code is no longer official :-().
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1995-11-25 05:42:30 +00:00
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;;; Code:
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(defvar morse-code '(("a" . ".-")
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("b" . "-...")
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("c" . "-.-.")
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("d" . "-..")
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("e" . ".")
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("f" . "..-.")
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("g" . "--.")
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("h" . "....")
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("i" . "..")
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("j" . ".---")
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("k" . "-.-")
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("l" . ".-..")
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("m" . "--")
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("n" . "-.")
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("o" . "---")
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("p" . ".--.")
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("q" . "--.-")
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("r" . ".-.")
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("s" . "...")
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("t" . "-")
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("u" . "..-")
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("v" . "...-")
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("w" . ".--")
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("x" . "-..-")
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("y" . "-.--")
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("z" . "--..")
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;; Punctuation
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("=" . "-...-")
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("?" . "..--..")
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("/" . "-..-.")
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("," . "--..--")
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("." . ".-.-.-")
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(":" . "---...")
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("'" . ".----.")
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("-" . "-....-")
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("(" . "-.--.-")
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(")" . "-.--.-")
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;; Numbers
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("0" . "-----")
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("1" . ".----")
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("2" . "..---")
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("3" . "...--")
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("4" . "....-")
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("5" . ".....")
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("6" . "-....")
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("7" . "--...")
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("8" . "---..")
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("9" . "----."))
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"Morse code character set.")
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2000-10-08 17:37:14 +00:00
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;;;###autoload
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1995-11-25 05:42:30 +00:00
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(defun morse-region (beg end)
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"Convert all text in a given region to morse code."
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(interactive "r")
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(if (integerp end)
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(setq end (copy-marker end)))
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(save-excursion
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(let ((sep "")
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str morse)
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(goto-char beg)
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(while (< (point) end)
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(setq str (downcase (buffer-substring (point) (1+ (point)))))
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(cond ((looking-at "\\s-+")
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(goto-char (match-end 0))
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(setq sep ""))
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((setq morse (assoc str morse-code))
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(delete-char 1)
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(insert sep (cdr morse))
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(setq sep "/"))
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(t
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(forward-char 1)
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(setq sep "")))))))
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2000-10-08 17:37:14 +00:00
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;;;###autoload
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1995-11-25 05:42:30 +00:00
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(defun unmorse-region (beg end)
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"Convert morse coded text in region to ordinary ASCII text."
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(interactive "r")
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(if (integerp end)
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(setq end (copy-marker end)))
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(save-excursion
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(let (str paren morse)
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(goto-char beg)
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(while (< (point) end)
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(if (null (looking-at "[-.]+"))
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(forward-char 1)
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(setq str (buffer-substring (match-beginning 0) (match-end 0)))
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(if (null (setq morse (rassoc str morse-code)))
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(goto-char (match-end 0))
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(replace-match
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(if (string-equal "(" (car morse))
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(if (setq paren (null paren)) "(" ")")
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(car morse)) t)
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(if (looking-at "/")
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(delete-char 1))))))))
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(provide 'morse)
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;;; morse.el ends here
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