On Mon, Mar 10, 2008 at 4:40 PM, Robert Dailey <rcdailey@gmail.com> wrote:
Perhaps, also, I am misunderstanding Boost.Iostreams. Please clarify. Thanks.
You're running into an issue with buffering. Even though you only need 8 bytes, the stream buffer has a 4096 byte buffer and will try to fill it up. Unfortunately, there isn't much documentation on how Boost.Iostreams handles buffering. There are basically three options: 1) create the stream buffer directly and supply a buffer size, then pass the buffer to a boost::iostreams::stream object 2) use 'optimally_buffered_tag' in your device's category and make a member function called optimal_buffer_size() that returns an std::streamsize of 0 3) perform validation in your read method to ensure you aren't reading too much - Jim