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v2_encoder.cpp
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/*
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Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
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This file is part of libzmq, the ZeroMQ core engine in C++.
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libzmq is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by 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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As a special exception, the Contributors give you permission to link
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this library with independent modules to produce an executable,
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regardless of the license terms of these independent modules, and to
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copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the
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terms and conditions of the license of that module. An independent
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module is a module which is not derived from or based on this library.
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If you modify this library, you must extend this exception to your
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version of the library.
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libzmq is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser 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 "
precompiled.hpp
"
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#include "
v2_protocol.hpp
"
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#include "
v2_encoder.hpp
"
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#include "
likely.hpp
"
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#include "
wire.hpp
"
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zmq::v2_encoder_t::v2_encoder_t
(
size_t
bufsize_) :
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encoder_base_t
<
v2_encoder_t
> (bufsize_)
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{
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// Write 0 bytes to the batch and go to message_ready state.
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next_step
(NULL, 0, &
v2_encoder_t::message_ready
,
true
);
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}
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zmq::v2_encoder_t::~v2_encoder_t
()
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{
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}
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void
zmq::v2_encoder_t::message_ready
()
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{
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// Encode flags.
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unsigned
char
&protocol_flags =
tmpbuf
[0];
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protocol_flags = 0;
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if
(
in_progress
->
flags
() &
msg_t::more
)
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protocol_flags |=
v2_protocol_t::more_flag
;
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if
(
in_progress
->
size
() > 255)
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protocol_flags |=
v2_protocol_t::large_flag
;
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if
(
in_progress
->
flags
() &
msg_t::command
)
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protocol_flags |=
v2_protocol_t::command_flag
;
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// Encode the message length. For messages less then 256 bytes,
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// the length is encoded as 8-bit unsigned integer. For larger
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// messages, 64-bit unsigned integer in network byte order is used.
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const
size_t
size
=
in_progress
->
size
();
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if
(
unlikely
(size > 255)) {
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put_uint64
(
tmpbuf
+ 1, size);
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next_step
(
tmpbuf
, 9, &
v2_encoder_t::size_ready
,
false
);
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}
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else
{
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tmpbuf
[1] = static_cast <uint8_t> (
size
);
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next_step
(
tmpbuf
, 2, &
v2_encoder_t::size_ready
,
false
);
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}
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}
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void
zmq::v2_encoder_t::size_ready
()
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{
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// Write message body into the buffer.
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next_step
(
in_progress
->
data
(),
in_progress
->
size
(),
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&
v2_encoder_t::message_ready
,
true
);
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}
size
#define size
zmq::v2_encoder_t::tmpbuf
unsigned char tmpbuf[9]
Definition:
v2_encoder.hpp:51
zmq::v2_protocol_t::more_flag
Definition:
v2_protocol.hpp:42
zmq::v2_encoder_t::v2_encoder_t
v2_encoder_t(size_t bufsize_)
Definition:
v2_encoder.cpp:36
v2_protocol.hpp
zmq::encoder_base_t< v2_encoder_t >::in_progress
msg_t * in_progress
Definition:
encoder.hpp:183
zmq::encoder_base_t< v2_encoder_t >::next_step
void next_step(void *write_pos_, size_t to_write_, step_t next_, bool new_msg_flag_)
Definition:
encoder.hpp:151
zmq::msg_t::command
Definition:
msg.hpp:79
zmq::v2_protocol_t::command_flag
Definition:
v2_protocol.hpp:44
zmq::v2_encoder_t
Definition:
v2_encoder.hpp:39
zmq::msg_t::size
unsigned char size
Definition:
msg.hpp:188
v2_encoder.hpp
zmq::v2_encoder_t::size_ready
void size_ready()
Definition:
v2_encoder.cpp:73
zmq::v2_protocol_t::large_flag
Definition:
v2_protocol.hpp:43
unlikely
#define unlikely(x)
Definition:
likely.hpp:38
zmq::encoder_base_t
Definition:
encoder.hpp:55
precompiled.hpp
zmq::msg_t::more
Definition:
msg.hpp:78
likely.hpp
zmq::put_uint64
void put_uint64(unsigned char *buffer_, uint64_t value)
Definition:
wire.hpp:81
zmq::v2_encoder_t::message_ready
void message_ready()
Definition:
v2_encoder.cpp:47
zmq::msg_t::data
unsigned char data[max_vsm_size]
Definition:
msg.hpp:187
zmq::v2_encoder_t::~v2_encoder_t
virtual ~v2_encoder_t()
Definition:
v2_encoder.cpp:43
wire.hpp
zmq::msg_t::flags
unsigned char flags
Definition:
msg.hpp:181
zeromq
libzmq
src
v2_encoder.cpp
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