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.\"   Copyright (c) 1994-2006 Lars Wirzenius.  All rights reserved.
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.\" part of publib
.\" "@(#)publib-strutil:$Id: strrot13.3,v 1.1 1994/02/05 17:09:25 liw Exp $"
.\"
.TH STRROT13 3pub "C Programmer's Manual" Publib "C Programmer's Manual"
.SH NAME
strrot13 \- encrypt or decrypt string using rot13
.SH SYNOPSIS
.nf
#include <publib.h>
char *\fBstrrot13\fR(char *\fIstr\fR);
.SH DESCRIPTION
\fIstrrot13\fR converts the argument string using rot13, i.e., it
replaces each letter a with n, n with a, b with o, o with b, and
so on.  Converting twice results in the original string.  Non-letter
characters are not converted.
.PP
The rot13 encryption method is used commonly on USENET to hide
offensive text, or spoilers in discussions about movies or books,
or in other similar occasions.
.SH "RETURN VALUE"
\fIstrrot13\fR returns its argument.
.SH "SEE ALSO"
publib(3), crypt(3)
.SH AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi)