[Boost-users] Iostreams code_converter peculiarities

Subject: [Boost-users] Iostreams code_converter peculiarities
From: Eddie Carle (eddie_at_[hidden])
Date: 2011-01-24 21:23:35

I've been working on converting a the fastcgi++ library over to using 
boost::iostreams from std::iostreams and I've noticed some peculiarities 
that I can't seem to work passed.

For one, how do you change the buffer size of the code_converter adaptor? 
The built in facilities don't seem to actually do anything. I am adding 
to a filtering_stream and have noticed that for the following 
statements...

stream.push(code_converter<MyDevice>(myDevice), 8192);
stream.push(code_converter<MyDevice>(myDevice, 8192));
stream.push(code_converter<MyDevice>(myDevice, 8192), 8192);

All result in a buffer of 128 bytes. I can't figure out a way to actually 
change it. I've been monitoring what is going in the myDevice and it is 
always 128 byte chunks (or less). If I remove the code_converter from the 
stream and go directly in myDevice as per

stream.push(myDevice, 8192);

the buffer is sized as I want it to be and myDevice receives chunks of 
data maxing at 8192 bytes.

Secondly, when using the statement

stream.push(code_converter<MyDevice>(myDevice, 8192));

code_converter calls not MyDevice(const MyDevice&) for copying 
constructing the object but for some reason MyDevice(const MyDevice&, 
const long int&). What is that? Why is code_converter looking for such a 
constructor when I specify a buffer size for the code converter?

Thirdly, I can not for the life of me make the code converter flush it's 
data. If I call a stream.strict_sync() should the code_converter not get 
flushed as well? It doesn't. Everything else in the chain does but the 
code_converter won't fully flush until destruction.

Thanks.
-- 
	Eddie Carle