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template<typename Async_Read_Stream, typename Allocator, typename Handler> | |
void | boost::asio::async_read_until (Async_Read_Stream &s, boost::asio::basic_streambuf< Allocator > &b, char delim, Handler handler) |
Start an asynchronous operation to read data into a streambuf until a delimiter is encountered. | |
template<typename Async_Read_Stream, typename Allocator, typename Handler> | |
void | boost::asio::async_read_until (Async_Read_Stream &s, boost::asio::basic_streambuf< Allocator > &b, const boost::regex &expr, Handler handler) |
Start an asynchronous operation to read data into a streambuf until a regular expression is located. |
void boost::asio::async_read_until | ( | Async_Read_Stream & | s, | |
boost::asio::basic_streambuf< Allocator > & | b, | |||
char | delim, | |||
Handler | handler | |||
) |
Start an asynchronous operation to read data into a streambuf until a delimiter is encountered.
This function is used to asynchronously read data into the specified streambuf until the streambuf's get area contains the specified delimiter. The function call always returns immediately. The asynchronous operation will continue until one of the following conditions is true:
s | The stream from which the data is to be read. The type must support the Async_Read_Stream concept. | |
b | A streambuf object into which the data will be read. Ownership of the streambuf is retained by the caller, which must guarantee that it remains valid until the handler is called. | |
delim | The delimiter character. | |
handler | The handler to be called when the read operation completes. Copies will be made of the handler as required. The function signature of the handler must be: void handler( const Async_Read_Stream::error_type& error, // Result of operation. std::size_t bytes_transferred // The number of bytes in the // streambuf's get area up to // and including the delimiter. // 0 if an error occurred. ); |
boost::asio::streambuf b; ... void handler(const boost::asio::error& e, std::size_t size) { if (!e) { std::istream is(&b); std::string line; std::getline(is, line); ... } } ... boost::asio::async_read_until(s, b, '\n', handler);
void boost::asio::async_read_until | ( | Async_Read_Stream & | s, | |
boost::asio::basic_streambuf< Allocator > & | b, | |||
const boost::regex & | expr, | |||
Handler | handler | |||
) |
Start an asynchronous operation to read data into a streambuf until a regular expression is located.
This function is used to asynchronously read data into the specified streambuf until the streambuf's get area contains some data that matches a regular expression. The function call always returns immediately. The asynchronous operation will continue until one of the following conditions is true:
s | The stream from which the data is to be read. The type must support the Async_Read_Stream concept. | |
b | A streambuf object into which the data will be read. Ownership of the streambuf is retained by the caller, which must guarantee that it remains valid until the handler is called. | |
expr | The regular expression. | |
handler | The handler to be called when the read operation completes. Copies will be made of the handler as required. The function signature of the handler must be: void handler( const Async_Read_Stream::error_type& error, // Result of operation. std::size_t bytes_transferred // The number of bytes in the // streambuf's get area up to // and including the substring // that matches the regular // expression. 0 if an error // occurred. ); |
boost::asio::streambuf b; ... void handler(const boost::asio::error& e, std::size_t size) { if (!e) { std::istream is(&b); std::string line; std::getline(is, line); ... } } ... boost::asio::async_read_until(s, b, boost::regex("\r\n"), handler);
Copyright © 2003 - 2006 Christopher M. Kohlhoff |