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All data conversion commands support only one option,
-mode. Allowed values are ``encode'', ``decode'' and
all unique abbreviations. It specifies the operation to
be executed in immediate mode or the operation executed
upon write if attached to a channel.
Encode converts from binary data into the described
representation, decode does the reverse (obviously  ).
Standard conversions are
| bin |
Converts bytes into dual representation.
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| oct |
Converts bytes into octal representation.
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| hex |
Converts bytes into hexadecimal representation.
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None of them buffers characters internally.
| uuencode |
Blocks of 3 characters are uuencoded/decoded. Will
buffer 2 characters internally until a block is complete.
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| base64 |
Blocks of 3 characters are base64-encoded/decoded. This is
equivalent to PGP's ASCII armor. Used by MIME too. Will
buffer 2 characters internally until a block is complete.
See RFC 2045 for its definition.
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| ascii85 |
Blocks of 4 characters will be encoded into Ascii85
representation as defined in the 'Postscript Reference
Manual' (2nd Edition, section 3.13, page 129).
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| otp_words |
Blocks of 64-bits are encoded as six English words,
as defined in RFC 2289.
See also otp_md5.
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| quoted-printable |
Printable ASCII characters are largely untouched. Otherwise
a three-character encoding sequence is used. This is MIME's
compromise encoding. See RFC 2045 for its definition.
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With the exception of otp_words
all of these are able to convert an incomplete block at the
end of input.
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