base64 man page on Ubuntu

base64 man page on Ubuntu

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base64(3tcl)	     Text encoding & decoding binary data	  base64(3tcl)

______________________________________________________________________________

NAME
       base64 - base64-encode/decode binary data

SYNOPSIS
       package require Tcl  8

       package require base64  ?2.4.1?

       ::base64::encode ?-maxlen maxlen? ?-wrapchar wrapchar? string

       ::base64::decode string

_________________________________________________________________

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 60.

	      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				     2.4.1			  base64(3tcl)

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