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/*
Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
0MQ 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/>.
*/
#include "v2_protocol.hpp"
#include "v2_encoder.hpp"
#include "likely.hpp"
#include "wire.hpp"
zmq::v2_encoder_t::v2_encoder_t (size_t bufsize_) :
encoder_base_t <v2_encoder_t> (bufsize_)
{
// Write 0 bytes to the batch and go to message_ready state.
next_step (NULL, 0, &v2_encoder_t::message_ready, true);
}
zmq::v2_encoder_t::~v2_encoder_t ()
{
}
void zmq::v2_encoder_t::message_ready ()
{
// Encode flags.
unsigned char &protocol_flags = tmpbuf [0];
protocol_flags = 0;
if (in_progress->flags () & msg_t::more)
protocol_flags |= v2_protocol_t::more_flag;
if (in_progress->size () > 255)
protocol_flags |= v2_protocol_t::large_flag;
if (in_progress->flags () & msg_t::command)
protocol_flags |= v2_protocol_t::command_flag;
// Encode the message length. For messages less then 256 bytes,
// the length is encoded as 8-bit unsigned integer. For larger
// messages, 64-bit unsigned integer in network byte order is used.
const size_t size = in_progress->size ();
if (unlikely (size > 255)) {
put_uint64 (tmpbuf + 1, size);
next_step (tmpbuf, 9, &v2_encoder_t::size_ready, false);
}
else {
tmpbuf [1] = static_cast <uint8_t> (size);
next_step (tmpbuf, 2, &v2_encoder_t::size_ready, false);
}
}
void zmq::v2_encoder_t::size_ready ()
{
// Write message body into the buffer.
next_step (in_progress->data (), in_progress->size (),
&v2_encoder_t::message_ready, true);
}
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