1 files changed, 80 insertions, 0 deletions
diff --git a/src/sub.cpp b/src/sub.cpp
new file mode 100644
index 0000000..6edb7bb
--- /dev/null
+++ b/src/sub.cpp
@@ -0,0 +1,80 @@
+/*
+    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 "sub.hpp"
+#include "msg.hpp"
+
+zmq::sub_t::sub_t (class ctx_t *parent_, uint32_t tid_, int sid_) :
+    xsub_t (parent_, tid_, sid_)
+{
+    options.type = ZMQ_SUB;
+
+    //  Switch filtering messages on (as opposed to XSUB which where the
+    //  filtering is off).
+    options.filter = true;
+}
+
+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.
+    msg_t msg;
+    int rc = msg.init_size (optvallen_ + 1);
+    errno_assert (rc == 0);
+    unsigned char *data = (unsigned char*) msg.data ();
+    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 = 0;
+    rc = xsub_t::xsend (&msg);
+    if (rc != 0)
+        err = errno;
+    int rc2 = msg.close ();
+    errno_assert (rc2 == 0);
+    if (rc != 0)
+        errno = err;
+    return rc;
+}
+
+int zmq::sub_t::xsend (msg_t *)
+{
+    //  Overload the XSUB's send.
+    errno = ENOTSUP;
+    return -1;
+}
+
+bool zmq::sub_t::xhas_out ()
+{
+    //  Overload the XSUB's send.
+    return false;
+}