ROT13
Apply "ROT13" Transformation to a File


ROT13 is a C program which reads a file and makes a copy in which all characters have been "rotated" by 13 positions, and all digits have been "rotated" by 5 positions.

Applying ROT13 to the transformed file returns the original. Thus, ROT13 can be used as a very simply method of encoding and decoding text files. Only an idiot would be fooled by this encoding, but nonetheless the encoding serves a number of useful purposes. And often, it's only idiots you have to fool, after all.

Usage:

rot13 file1.txt
where The output filename is the ROT13 transformation of the input filename. In the case of "file1.txt", the output filename would be svyr6.gkg.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages:

ROT13 is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:

CAESAR, a C library which can apply a Caesar Shift Cipher to a string of text.

CHRPAK, a C library which works with characters and strings.

FILUM, a C library which performs various operations on files.

PIG_LATIN, a C program which makes a copy of a file, translating the text into Pig Latin.

UUDECODE, a C program which reads a UU encoded text file and translates it back to its original form.

UUENCODE, a C program which translates a file (possibly in binary format) to the UU encoding.

Source Code:

Examples and Tests:

List of Routines:

You can go up one level to the C source codes.


Last revised on 29 January 2016.