'\"
'\" Generated from file 'rot\&.man' by tcllib/doctools with format 'nroff'
'\" Copyright (c) 2009 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>
'\"
.TH "tcl::transform::rot" n 1\&.1 tcllib "Reflected/virtual channel support"
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.BS
.SH NAME
tcl::transform::rot \- rot-encryption
.SH SYNOPSIS
package require \fBTcl 8\&.6 9\fR
.sp
package require \fBtcl::transform::core ?1\&.1?\fR
.sp
package require \fBtcl::transform::rot ?1\&.1?\fR
.sp
\fB::tcl::transform::rot\fR \fIchan\fR \fIkey\fR
.sp
.BE
.SH DESCRIPTION
.PP
The \fBtcl::transform::rot\fR package provides a command creating
a channel transformation which performs primitive encryption (on
writing) and decryption (on reading) on the alphabetic characters\&. The
algorithm is the Caesar-cipher, a specific variant of which is rot13\&.
.PP
A related transformations in this module is
\fBtcl::transform::otp\fR\&.
.PP
The internal \fBTclOO\fR class implementing the transform
handler is a sub-class of the \fBtcl::transform::core\fR
framework\&.
.SH API
.TP
\fB::tcl::transform::rot\fR \fIchan\fR \fIkey\fR
This command creates a rot encryption transformation on top of the
channel \fIchan\fR and returns its handle\&.
.sp
The "\fIkey\fR" specifies how far characters are rotated in the
alphabet, and is wrapped to the range "0\&.\&.\&.25"\&.
.sp
Note that this transformation affects only bytes in the ranges
ASCII 65\&.\&.\&.90, and 97\&.\&.\&.122, i\&.e\&. the upper- and lower-case alphabetic
characters, i\&.e\&. "A\&.\&.\&.Z" and "a\&.\&.\&.z"\&. All other bytes are passed
through unchanged\&.
.PP
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fIvirtchannel\fR of the
\fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&.
Please also report any ideas for enhancements you may have for either
package and/or documentation\&.
.PP
When proposing code changes, please provide \fIunified diffs\fR,
i\&.e the output of \fBdiff -u\fR\&.
.PP
Note further that \fIattachments\fR are strongly preferred over
inlined patches\&. Attachments can be made by going to the \fBEdit\fR
form of the ticket immediately after its creation, and then using the
left-most button in the secondary navigation bar\&.
.SH KEYWORDS
caesar cipher, channel transformation, cipher, decryption, encryption, reflected channel, rot, rot13, tip 230, transformation, virtual channel
.SH CATEGORY
Channels
.SH COPYRIGHT
.nf
Copyright (c) 2009 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>

.fi