Re: [Boost-users] [boost::iostreams] How to get number of byteswritten?

Subject: Re: [Boost-users] [boost::iostreams] How to get number of byteswritten?
From: Eric MALENFANT (Eric.Malenfant_at_[hidden])
Date: 2008-11-28 08:45:49

eg, le 27 novembre 2008 14:49:
> Milan Svoboda wrote:
>> I'm using boost::iostreams and its filters to compress and
>> decompress data. However I'm not able to retrieve number of bytes
>> really written (number of bytes after a compression). 
>> 
>> Does anybody know how to do that?
[snip]
> 
> Maybe I dont quite understand the problem...
> Could you just write a simple pass-through filter which counts the
> bytes only? Something like:
> 
>      io::filtering_ostream out;
>      out.push(compressor());
>      out.push(passthru()); // <- this just counts bytes
>      out.push(file_sink("my_file.txt"));
> 

...and if it is the case, good news: It already exists:
http://www.boost.org/doc/libs/1_37_0/libs/iostreams/doc/classes/counter.html

Éric Malenfant
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A conclusion is the place where you got tired of thinking