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76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
/*
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Copyright (c) 2007-2009 FastMQ Inc.
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This file is part of 0MQ.
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0MQ is free software; you can redistribute it and/or modify it under
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the terms of the Lesser GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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Lesser GNU General Public License for more details.
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You should have received a copy of the Lesser GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "zmq_encoder.hpp"
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#include "i_inout.hpp"
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#include "wire.hpp"
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zmq::zmq_encoder_t::zmq_encoder_t () :
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source (NULL)
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{
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zmq_msg_init (&in_progress);
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// Write 0 bytes to the batch and go to message_ready state.
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next_step (NULL, 0, &zmq_encoder_t::message_ready, true);
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}
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zmq::zmq_encoder_t::~zmq_encoder_t ()
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{
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zmq_msg_close (&in_progress);
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}
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void zmq::zmq_encoder_t::set_inout (i_inout *source_)
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{
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source = source_;
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}
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bool zmq::zmq_encoder_t::size_ready ()
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{
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// Write message body into the buffer.
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next_step (zmq_msg_data (&in_progress), zmq_msg_size (&in_progress),
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&zmq_encoder_t::message_ready, false);
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return true;
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}
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bool zmq::zmq_encoder_t::message_ready ()
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{
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// Read new message from the dispatcher. If there is none, return false.
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// Note that new state is set only if write is successful. That way
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// unsuccessful write will cause retry on the next state machine
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// invocation.
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if (!source || !source->read (&in_progress))
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return false;
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size_t size = zmq_msg_size (&in_progress);
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// For messages less than 255 bytes long, write one byte of message size.
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// For longer messages write 0xff escape character followed by 8-byte
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// message size.
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if (size < 255) {
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tmpbuf [0] = (unsigned char) size;
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next_step (tmpbuf, 1, &zmq_encoder_t::size_ready, true);
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}
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else {
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tmpbuf [0] = 0xff;
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put_uint64 (tmpbuf + 1, size);
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next_step (tmpbuf, 9, &zmq_encoder_t::size_ready, true);
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}
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return true;
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}
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