Commit 280b8e59 authored by Simon Josefsson's avatar Simon Josefsson
Browse files

(rot13-translate-table): New variable.

(rot13, rot13-string, rot13-region): New functions.
parent 3ce79cf5
2002-05-24 Simon Josefsson <jas@extundo.com>
* rot13.el (rot13-translate-table): New variable.
(rot13, rot13-string, rot13-region): New functions.
2002-05-25 Martin Stjernholm <bug-cc-mode@gnu.org>
* progmodes/cc-engine.el (c-add-stmt-syntax): Fixed some cases
......
;;; rot13.el --- display a buffer in rot13
;; Copyright (C) 1988 Free Software Foundation, Inc.
;; Copyright (C) 1988,2002 Free Software Foundation, Inc.
;; Author: Howard Gayle
;; Maintainer: FSF
......@@ -24,7 +24,7 @@
;;; Commentary:
;; The single entry point, `rot13-other-window', performs a Caesar cipher
;; The entry point, `rot13-other-window', performs a Caesar cipher
;; encrypt/decrypt on the current buffer and displays the result in another
;; window. Rot13 encryption is sometimes used on USENET as a read-at-your-
;; own-risk wrapper for material some might consider offensive, such as
......@@ -32,6 +32,10 @@
;;
;; Written by Howard Gayle.
;; This hack is mainly to show off the char table stuff.
;;
;; New entry points, `rot13', `rot13-string', and `rot13-region' that
;; performs Ceasar cipher encrypt/decrypt on buffers and strings, was
;; added by Simon Josefsson.
;;; Code:
......@@ -45,6 +49,42 @@
table)
"Char table for rot 13 display.")
(defvar rot13-translate-table
(let ((str (make-string 127 0))
(i 0))
(while (< i 127)
(aset str i i)
(setq i (1+ i)))
(setq i 0)
(while (< i 26)
(aset str (+ i ?a) (+ (% (+ i 13) 26) ?a))
(aset str (+ i ?A) (+ (% (+ i 13) 26) ?A))
(setq i (1+ i)))
str)
"String table for rot 13 translation.")
;;;###autoload
(defun rot13 (object &optional start end)
"Return Rot13 encryption of OBJECT, a buffer or string."
(if (bufferp object)
(with-current-buffer object
(rot13-region start end))
(rot13-string object)))
;;;###autoload
(defun rot13-string (string)
"Return Rot13 encryption of STRING."
(with-temp-buffer
(insert string)
(rot13-region (point-min) (point-max))
(buffer-string)))
;;;###autoload
(defun rot13-region (start end)
"Rot13 encrypt the region between START and END in current buffer."
(interactive "r")
(translate-region start end rot13-translate-table))
;;;###autoload
(defun rot13-other-window ()
"Display current buffer in rot 13 in another window.
......
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