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/*
Copyright (c) 2007-2010 iMatix Corporation
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 "../include/zmq.h"
#include "sub.hpp"
zmq::sub_t::sub_t (class ctx_t *parent_, uint32_t tid_) :
xsub_t (parent_, tid_)
{
options.type = ZMQ_SUB;
}
zmq::sub_t::~sub_t ()
{
}
int zmq::sub_t::xsetsockopt (int option_, const void *optval_,
size_t optvallen_)
{
if (option_ != ZMQ_SUBSCRIBE && option_ != ZMQ_UNSUBSCRIBE) {
errno = EINVAL;
return -1;
}
// Create the subscription message.
zmq_msg_t msg;
zmq_msg_init_size (&msg, optvallen_ + 1);
unsigned char *data = (unsigned char*) zmq_msg_data (&msg);
if (option_ == ZMQ_SUBSCRIBE)
*data = 1;
else if (option_ == ZMQ_UNSUBSCRIBE)
*data = 0;
memcpy (data + 1, optval_, optvallen_);
// Pass it further on in the stack.
int err;
int rc = xsend (&msg, 0);
if (rc != 0)
err = errno;
zmq_msg_close (&msg);
if (rc != 0)
errno = err;
return rc;
}
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