base64(n)            Text encoding & decoding binary data            base64(n)



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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://sourceforge.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)
