streambuf

I have a serialized structure, which is being sent via socket. I need to read it in chunks, since one of its fields contains the size of the data remaining: I need to read first few bytes, find out the length and read the rest. This is what I have got: boost::asio::streambuf buffer; boost::system::error_code err_code; // here I need to read only first 16 bytes boost::asio::read(socket, buffer, err_code); std::istream is(&buffer); boost::archive::binary_iarchive ia(is); ia >> my_struct; I have taken a look at boost::asio::async_read(s, boost::asio::buffer(data, size), handler); but it can only

boost::asio::streambuf b; ... void handler(const boost::system::error_code& e, std::size_t size) { if (!e) { std::stringstream sstr(std::string((std::istreambuf_iterator<char>(&b)), std::istreambuf_iterator<char>())); b.consume(size); ... } } ... boost::asio::async_read_until(s, b, "END\r\n", handler); when the consume method is called, the memory occupied by streambuf b is not released. The memory will grow up as async_read_until is called multiple times. Is my usage correct? Is there any way to free the memory before the get pointer of streambuf? asio::streambuf is based on std::vector that

I'm want to check for incoming data packages on the serial port, using boost.asio . Each data packet will start with a header that is one byte long, and will specify what type of the message has been sent. Each different type of message has its own length. The function I want to write should listen for new incoming messages continually, and when it finds one it should read it, and call some other function to parse it. My current code is as follows: void check_for_incoming_messages() { boost::asio::streambuf response; boost::system::error_code error; std::string s1, s2; if (boost::asio::read

I want to use this snippet from Mr-Edd's iostreams article to print std::clog somewhere. #include <iostream> #include <iomanip> #include <string> #include <sstream> int main() { std::ostringstream oss; // Make clog use the buffer from oss std::streambuf *former_buff = std::clog.rdbuf(oss.rdbuf()); std::clog << "This will appear in oss!" << std::flush; std::cout << oss.str() << '\\n'; // Give clog back its previous buffer std::clog.rdbuf(former_buff); return 0; } so, in a mainloop, I will do something like while (! oss.eof()) { //add to window text somewhere } Here's the ostringstream docs but

What is the difference between istreambuf_iterator and istream_iterator ? And in general what is the difference between streams and streambufs? I really can't find any clear explanation for this so decided to ask here. IOstreams use streambufs to as their source / target of input / output. Effectively, the streambuf-family does all the work regarding IO and the IOstream-family is only used for formatting and to-string / from-string transformation. Now, istream_iterator takes a template argument that says what the unformatted string-sequence from the streambuf should be formatted as, like