base64(n) Text encoding & decoding binary data base64(n) ______________________________________________________________________________
NAME
base64 - base64-encode/decode binary data
SYNOPSIS
package require Tcl 8
package require base64 ?2.4.2?
::base64::encode ?-maxlen maxlen? ?-wrapchar wrapchar? string
::base64::decode string
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DESCRIPTION
This package provides procedures to encode binary data into base64 and
back.
::base64::encode ?-maxlen maxlen? ?-wrapchar wrapchar? string
Base64 encodes the given binary string and returns the encoded
result. Inserts the character wrapchar every maxlen characters
of output. wrapchar defaults to newline. maxlen defaults to 76.
Note well: If your string is not simple ascii you should fix the
string encoding before doing base64 encoding. See the examples.
The command will throw an error for negative values of maxlen,
or if maxlen is not an integer number.
::base64::decode string
Base64 decodes the given string and returns the binary data.
The decoder ignores whitespace in the string.
EXAMPLES
% base64::encode "Hello, world"
SGVsbG8sIHdvcmxk
% base64::encode [string repeat xyz 20]
eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6
eHl6eHl6eHl6
% base64::encode -wrapchar "" [string repeat xyz 20]
eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6eHl6
# NOTE: base64 encodes BINARY strings.
% set chemical [encoding convertto utf-8 "C\u2088H\u2081\u2080N\u2084O\u2082"]
% set encoded [base64::encode $chemical]
Q+KCiEjigoHigoBO4oKET+KCgg==
% set caffeine [encoding convertfrom utf-8 [base64::decode $encoded]]
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain
bugs and other problems. Please report such in the category base64 of
the Tcllib SF Trackers [http://source-
forge.net/tracker/?group_id=12883]. Please also report any ideas for
enhancements you may have for either package and/or documentation.
KEYWORDS
base64, encoding
CATEGORY
Text processing
COPYRIGHT
Copyright (c) 2000, Eric Melski
Copyright (c) 2001, Miguel Sofer
base64 2.4.2 base64(n)
Mac OS X 10.8 - Generated Wed Sep 5 07:35:34 CDT 2012