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/*
Copyright (c) 2007-2009 FastMQ Inc.
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the Lesser GNU 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
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "zmq_decoder.hpp"
#include "i_inout.hpp"
#include "wire.hpp"
zmq::zmq_decoder_t::zmq_decoder_t () :
destination (NULL)
{
zmq_msg_init (&in_progress);
// At the beginning, read one byte and go to one_byte_size_ready state.
next_step (tmpbuf, 1, &zmq_decoder_t::one_byte_size_ready);
}
zmq::zmq_decoder_t::~zmq_decoder_t ()
{
zmq_msg_close (&in_progress);
}
void zmq::zmq_decoder_t::set_inout (i_inout *destination_)
{
destination = destination_;
}
bool zmq::zmq_decoder_t::one_byte_size_ready ()
{
// First byte of size is read. If it is 0xff read 8-byte size.
// Otherwise allocate the buffer for message data and read the
// message data into it.
if (*tmpbuf == 0xff)
next_step (tmpbuf, 8, &zmq_decoder_t::eight_byte_size_ready);
else {
zmq_msg_init_size (&in_progress, *tmpbuf);
next_step (zmq_msg_data (&in_progress), *tmpbuf,
&zmq_decoder_t::message_ready);
}
return true;
}
bool zmq::zmq_decoder_t::eight_byte_size_ready ()
{
// 8-byte size is read. Allocate the buffer for message body and
// read the message data into it.
size_t size = (size_t) get_uint64 (tmpbuf);
zmq_msg_init_size (&in_progress, size);
next_step (zmq_msg_data (&in_progress), size,
&zmq_decoder_t::message_ready);
return true;
}
bool zmq::zmq_decoder_t::message_ready ()
{
// Message is completely read. Push it further and start reading
// new message.
if (!destination->write (&in_progress))
return false;
next_step (tmpbuf, 1, &zmq_decoder_t::one_byte_size_ready);
return true;
}
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