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ascii85(n) [osx man page]

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

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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 "Cu2088Hu2081u2080Nu2084Ou2082"] % set encoded [ascii85::encode $chemical] 6fN]R8E,5PiduUiduhZidua % 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://sourceforge.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 Gavilan base64 1.0 ascii85(n)

Check Out this Related Man Page

base32(n)							  Base32 encoding							 base32(n)

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NAME
base32 - base32 standard encoding SYNOPSIS
package require Tcl 8.4 package require base32::core ?0.1? package require base32 ?0.1? ::base32::encode string ::base32::decode estring _________________________________________________________________ DESCRIPTION
This package provides commands for encoding and decoding of strings into and out of the standard base32 encoding as specified in RFC 3548. API
::base32::encode string This command encodes the given string in base32 and returns the encoded string as its result. The result may be padded with the character = to signal a partial encoding at the end of the input string. ::base32::decode estring This commands takes the estring and decodes it under the assumption that it is a valid base32 encoded string. The result of the decoding is returned as the result of the command. Note that while the encoder will generate only uppercase characters this decoder accepts input in lowercase as well. The command will always throw an error whenever encountering conditions which signal some type of bogus input, namely if [1] the input contains characters which are not valid output of a base32 encoder, [2] the length of the input is not a multiple of eight, [3] padding appears not at the end of input, but in the middle, [4] the padding has not of length six, four, three, or one characters, CODE MAP
The code map used to convert 5-bit sequences is shown below, with the numeric id of the bit sequences to the left and the character used to encode it to the right. It should be noted that the characters "0" and "1" are not used by the encoding. This is done as these characters can be easily confused with "O", "o" and "l" (L). 0 A 9 J 18 S 27 3 1 B 10 K 19 T 28 4 2 C 11 L 20 U 29 5 3 D 12 M 21 V 30 6 4 E 13 N 22 W 31 7 5 F 14 O 23 X 6 G 15 P 24 Y 7 H 16 Q 25 Z 8 I 17 R 26 2 BUGS, IDEAS, FEEDBACK This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category base32 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
base32, rfc3548 CATEGORY
Text processing COPYRIGHT
Copyright (c) Public domain base32 0.1 base32(n)
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