But there is still the problem with running off the end of the source – If the source is not a multiple of 3 bytes then the input iterator will run off the end of the input sequence which can cause an error.

  Andrew

From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey
Sent: Thursday, January 03, 2008 6:47 PM
To: boost-users@lists.boost.org
Subject: Re: [Boost-users] base 64 encoding

I had to separately record the number of bytes.  Then when I decode, just pull off that number of bytes.

Robert Ramey

"Eames, Andrew" <andrew@cognex.com> wrote in message news:8F37BF6F420455468C4BD57DD6BE199004C613F8@cobra.pc.cognex.com...

Hi,

I’m trying to encode base64 data by composing base64_from_binary with transform_width but this doesn’t appear to work correctly when the data is not a multiple of 3 long. What is the correct way to handle this  - do I have to handle the padding myself by extending the input data and then patching the tail of the result?

   Thanks

       Andrew

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