/* Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file This file is part of libzmq, the ZeroMQ core engine in C++. libzmq is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (LGPL) as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. As a special exception, the Contributors give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you must extend this exception to your version of the library. libzmq is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __ZMQ_I_ENCODER_HPP_INCLUDED__ #define __ZMQ_I_ENCODER_HPP_INCLUDED__ #include "stdint.hpp" namespace zmq { // Forward declaration class msg_t; // Interface to be implemented by message encoder. struct i_encoder { virtual ~i_encoder () {} // The function returns a batch of binary data. The data // are filled to a supplied buffer. If no buffer is supplied (data_ // is NULL) encoder will provide buffer of its own. // Function returns 0 when a new message is required. virtual size_t encode (unsigned char **data_, size_t size) = 0; // Load a new message into encoder. virtual void load_msg (msg_t *msg_) = 0; }; } #endif