Provided by: tcllib_1.14-dfsg-1_all bug

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