Line data    Source code

       1             : /*
       2             :     Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
       3             : 
       4             :     This file is part of libzmq, the ZeroMQ core engine in C++.
       5             : 
       6             :     libzmq is free software; you can redistribute it and/or modify it under
       7             :     the terms of the GNU Lesser General Public License (LGPL) as published
       8             :     by the Free Software Foundation; either version 3 of the License, or
       9             :     (at your option) any later version.
      10             : 
      11             :     As a special exception, the Contributors give you permission to link
      12             :     this library with independent modules to produce an executable,
      13             :     regardless of the license terms of these independent modules, and to
      14             :     copy and distribute the resulting executable under terms of your choice,
      15             :     provided that you also meet, for each linked independent module, the
      16             :     terms and conditions of the license of that module. An independent
      17             :     module is a module which is not derived from or based on this library.
      18             :     If you modify this library, you must extend this exception to your
      19             :     version of the library.
      20             : 
      21             :     libzmq is distributed in the hope that it will be useful, but WITHOUT
      22             :     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      23             :     FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
      24             :     License for more details.
      25             : 
      26             :     You should have received a copy of the GNU Lesser General Public License
      27             :     along with this program.  If not, see <http://www.gnu.org/licenses/>.
      28             : */
      29             : 
      30             : #include "precompiled.hpp"
      31             : #include "encoder.hpp"
      32             : #include "v1_encoder.hpp"
      33             : #include "likely.hpp"
      34             : #include "wire.hpp"
      35             : 
      36           0 : zmq::v1_encoder_t::v1_encoder_t (size_t bufsize_) :
      37           0 :     encoder_base_t <v1_encoder_t> (bufsize_)
      38             : {
      39             :     //  Write 0 bytes to the batch and go to message_ready state.
      40           0 :     next_step (NULL, 0, &v1_encoder_t::message_ready, true);
      41           0 : }
      42             : 
      43           0 : zmq::v1_encoder_t::~v1_encoder_t ()
      44             : {
      45             : }
      46             : 
      47           0 : void zmq::v1_encoder_t::size_ready ()
      48             : {
      49             :     //  Write message body into the buffer.
      50             :     next_step (in_progress->data (), in_progress->size (),
      51           0 :         &v1_encoder_t::message_ready, true);
      52           0 : }
      53             : 
      54           0 : void zmq::v1_encoder_t::message_ready ()
      55             : {
      56             :     //  Get the message size.
      57           0 :     size_t size = in_progress->size ();
      58             : 
      59             :     //  Account for the 'flags' byte.
      60           0 :     size++;
      61             : 
      62             :     //  For messages less than 255 bytes long, write one byte of message size.
      63             :     //  For longer messages write 0xff escape character followed by 8-byte
      64             :     //  message size. In both cases 'flags' field follows.
      65           0 :     if (size < 255) {
      66           0 :         tmpbuf [0] = (unsigned char) size;
      67           0 :         tmpbuf [1] = (in_progress->flags () & msg_t::more);
      68           0 :         next_step (tmpbuf, 2, &v1_encoder_t::size_ready, false);
      69             :     }
      70             :     else {
      71           0 :         tmpbuf [0] = 0xff;
      72           0 :         put_uint64 (tmpbuf + 1, size);
      73           0 :         tmpbuf [9] = (in_progress->flags () & msg_t::more);
      74           0 :         next_step (tmpbuf, 10, &v1_encoder_t::size_ready, false);
      75             :     }
      76           0 : }