ascii85 man page on MacOSX

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ascii85(n)	     Text encoding & decoding binary data	    ascii85(n)

______________________________________________________________________________

NAME
       ascii85 - ascii85-encode/decode binary data

SYNOPSIS
       package require Tcl  8.4

       package require ascii85	?1.0?

       ::ascii85::encode ?-maxlen maxlen? ?-wrapchar wrapchar? string

       ::ascii85::decode string

_________________________________________________________________

DESCRIPTION
       This package provides procedures to encode binary data into ascii85 and
       back.

       ::ascii85::encode ?-maxlen maxlen? ?-wrapchar wrapchar? string
	      Ascii85 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 ascii85 encoding. See the examples.

	      The  command  will throw an error for negative values of maxlen,
	      or if maxlen is not an integer number.

       ::ascii85::decode string
	      Ascii85 decodes the given string and returns  the	 binary	 data.
	      The  decoder  ignores  whitespace in the string, as well as tabs
	      and newlines.

EXAMPLES
       % ascii85::encode "Hello, world"
       87cURD_*#TDfTZ)

       % ascii85::encode [string repeat xyz 24]
       G^4U[H$X^\H?a^]G^4U[H$X^\H?a^]G^4U[H$X^\H?a^]G^4U[H$X^\H?a^]G^4U[H$X^\H?a^]G
       ^4U[H$X^\H?a^]
       % ascii85::encode -wrapchar "" [string repeat xyz 24]
       G^4U[H$X^\H?a^]G^4U[H$X^\H?a^]G^4U[H$X^\H?a^]G^4U[H$X^\H?a^]G^4U[H$X^\H?a^]G^4U[H$X^\H?a^]

       # NOTE: ascii85 encodes BINARY strings.
       % set chemical [encoding convertto utf-8 "C\u2088H\u2081\u2080N\u2084O\u2082"]
       % set encoded [ascii85::encode $chemical]
       6fN]R8E,5Pidu\UiduhZidua
       % set caffeine [encoding convertfrom utf-8 [ascii85::decode $encoded]]

REFERENCES
       [1]    http://en.wikipedia.org/wiki/Ascii85

       [2]    Postscript Language Reference Manual,  3rd  Edition,  page  131.
	      http://www.adobe.com/devnet/postscript/pdfs/PLRM.pdf

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
       ascii85, encoding

CATEGORY
       Text processing

COPYRIGHT
       Copyright (c) 2010, Emiliano Gavilán

base64				      1.0			    ascii85(n)
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