'\"
'\" Generated from file 'base32hex\&.man' by tcllib/doctools with format 'nroff'
'\" Public domain
'\"
.TH "base32::hex" n 0\&.2 tcllib "Base32 encoding"
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.BS
.SH NAME
base32::hex \- base32 extended hex encoding
.SH SYNOPSIS
package require \fBTcl 8\&.5 9\fR
.sp
package require \fBbase32::core ?0\&.2?\fR
.sp
package require \fBbase32::hex ?0\&.2?\fR
.sp
\fB::base32::hex::encode\fR \fIstring\fR
.sp
\fB::base32::hex::decode\fR \fIestring\fR
.sp
.BE
.SH DESCRIPTION
.PP
This package provides commands for encoding and decoding of strings
into and out of the extended hex base32 encoding as specified in the
RFC 3548bis draft\&.
.SH API
.TP
\fB::base32::hex::encode\fR \fIstring\fR
This command encodes the given \fIstring\fR in extended hex base32 and
returns the encoded string as its result\&. The result may be padded
with the character \fB=\fR to signal a partial encoding at the end
of the input string\&.
.TP
\fB::base32::hex::decode\fR \fIestring\fR
This commands takes the \fIestring\fR and decodes it under the
assumption that it is a valid extended hex base32 encoded string\&. The
result of the decoding is returned as the result of the command\&.
.sp
Note that while the encoder will generate only uppercase characters
this decoder accepts input in lowercase as well\&.
.sp
The command will always throw an error whenever encountering
conditions which signal some type of bogus input, namely if
.RS
.IP [1]
the input contains characters which are not valid output
of a extended hex base32 encoder,
.IP [2]
the length of the input is not a multiple of eight,
.IP [3]
padding appears not at the end of input, but in the middle,
.IP [4]
the padding has not of length six, four, three, or one characters,
.RE
.PP
.SH "CODE MAP"
The code map used to convert 5-bit sequences is shown below, with the
numeric id of the bit sequences to the left and the character used to
encode it to the right\&. The important feature of the extended hex
mapping is that the first 16 codes map to the digits and hex
characters\&.
.CS


	0 0    9 9        18 I   27 R
	1 1   10 A        19 J   28 S
	2 2   11 B        20 K   29 T
	3 3   12 C        21 L   30 U
	4 4   13 D        22 M   31 V
	5 5   14 E        23 N
	6 6   15 F        24 O
	7 7        16 G   25 P
	8 8        17 H   26 Q

.CE
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fIbase32\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
base32, hex, rfc3548
.SH CATEGORY
Text processing
.SH COPYRIGHT
.nf
Public domain

.fi
