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libzmq/src/raw_decoder.cpp

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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 <stdlib.h>
#include <string.h>
#include "platform.hpp"
#ifdef ZMQ_HAVE_WINDOWS
#include "windows.hpp"
#endif
#include "raw_decoder.hpp"
#include "likely.hpp"
#include "wire.hpp"
#include "err.hpp"
zmq::raw_decoder_t::raw_decoder_t (size_t bufsize_,
int64_t maxmsgsize_, i_msg_sink *msg_sink_) :
decoder_base_t <raw_decoder_t> (bufsize_),
msg_sink (msg_sink_),
maxmsgsize (maxmsgsize_)
{
int rc = in_progress.init ();
errno_assert (rc == 0);
}
zmq::raw_decoder_t::~raw_decoder_t ()
{
int rc = in_progress.close ();
errno_assert (rc == 0);
}
void zmq::raw_decoder_t::set_msg_sink (i_msg_sink *msg_sink_)
{
msg_sink = msg_sink_;
}
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bool zmq::raw_decoder_t::stalled ()
{
return false;
}
bool zmq::raw_decoder_t::message_ready_size (size_t msg_sz)
{
int rc = in_progress.init_size (msg_sz);
if (rc != 0) {
errno_assert (errno == ENOMEM);
rc = in_progress.init ();
errno_assert (rc == 0);
decoding_error ();
return false;
}
next_step (in_progress.data (), in_progress.size (),
&raw_decoder_t::raw_message_ready);
return true;
}
bool zmq::raw_decoder_t::raw_message_ready ()
{
zmq_assert (in_progress.size ());
// Message is completely read. Push it further and start reading
// new message. (in_progress is a 0-byte message after this point.)
if (unlikely (!msg_sink))
return false;
int rc = msg_sink->push_msg (&in_progress);
if (unlikely (rc != 0)) {
if (errno != EAGAIN)
decoding_error ();
return false;
}
// NOTE: This is just to break out of process_buffer
// raw_message_ready should never get called in state machine w/o
// message_ready_size from stream_engine.
next_step (in_progress.data (), 1,
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&raw_decoder_t::raw_message_ready);
return true;
}