Last active
December 11, 2015 02:19
-
-
Save codepony/4530170 to your computer and use it in GitHub Desktop.
Simple rot13 encoder written in CLISP.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#| | |
| A Simple rot13 - encoder written in CLISP | |
| | |
rot13.lisp version 0.0.1 | |
Copyright (C) 2012 @d3f (http://identi.ca/d3f) | |
This program is free software: you can redistribute it and/or modify | |
it under the terms of the GNU Affero General Public License as | |
published by the Free Software Foundation, either version 3 of the | |
License, or (at your option) any later version. | |
This program 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 Affero General Public License for more details. | |
You should have received a copy of the GNU Affero General Public License | |
along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| | |
| How-to: | |
| type in `(load "rot13.lisp") and run it with (rot13) | |
|# | |
(defparameter code-list (list)) | |
(defparameter char-list (list)) | |
(defun coder (input-string) | |
(map 'list #'make-code-list input-string) | |
(map 'list #'make-char-list code-list) | |
(format t "~%Your string in rot13: ~a~%" (concatenate 'string char-list)) | |
(setf code-list (list)) | |
(setf char-list (list)) | |
) | |
(defun make-code-list (char) | |
(setf code-list (cons (char-code char) code-list)) | |
) | |
(defun make-char-list (code) | |
(when (and (>= code 97) (<= code 122)) ;; a == 97 and z == 122, that's why we did this. | |
(incf code 13) | |
(if (> code 122) | |
(setf code (- code 26)) | |
) | |
) | |
(when (and (>= code 65) (<= code 90)) ;; Same for A & Z | |
(incf code 13) | |
(if (> code 90) | |
(setf code (- code 26)) | |
) | |
) | |
(setf char-list (cons (code-char code) char-list)) | |
) | |
(defun rot13 () | |
(format t "Type in, what you want. I will give you rot13. But `quit' will exit.~%") | |
(let ((str (read-line))) | |
(cond | |
((equal str "quit") (format t "Good bye ~%")) | |
(t (coder str) (rot13))))) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment