# MIME::Decoder::Base64(3pm) - man - phpMan

## NAME
    [MIME::Decoder::Base64](https://www.chedong.com/phpMan.php/perldoc/MIME%3A%3ADecoder%3A%3ABase64/markdown) - encode/decode a "base64" stream

## SYNOPSIS
    A generic decoder object; see [MIME::Decoder](https://www.chedong.com/phpMan.php/perldoc/MIME%3A%3ADecoder/markdown) for usage.

## DESCRIPTION
    A [MIME::Decoder](https://www.chedong.com/phpMan.php/perldoc/MIME%3A%3ADecoder/markdown) subclass for the "base64" encoding. The name was chosen
    to jibe with the pre-existing [MIME::Base64](https://www.chedong.com/phpMan.php/perldoc/MIME%3A%3ABase64/markdown) utility package, which this
    class actually uses to translate each chunk.

    *   When decoding, the input is read one line at a time. The input
        accumulates in an internal buffer, which is decoded in
        multiple-of-4-sized chunks (plus a possible "leftover" input chunk,
        of course).

    *   When encoding, the input is read 45 bytes at a time: this ensures
        that the output lines are not too long. We chose 45 since it is a
        multiple of 3 and produces lines under 76 characters, as RFC 2045
        specifies: The encoded output stream must be represented in lines of
        no more than 76 characters each.

## SEE ALSO
    [MIME::Decoder](https://www.chedong.com/phpMan.php/perldoc/MIME%3A%3ADecoder/markdown)

## AUTHOR
    Eryq (<eryq@zeegee.com>), ZeeGee Software Inc (<http://www.zeegee.com>).

    All rights reserved. This program is free software; you can redistribute
    it and/or modify it under the same terms as Perl itself.