Add zmq_getmsgopt to the API

The new function allows to retrieve options (flags)
from zmq_msg_t.

Signed-off-by: Chuck Remes <cremes@mac.com>
Renamed from zmq_msg_flags to zmq_getmsgopt
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/zmq.cpp b/src/zmq.cpp
index b06b122..84dcdd1 100644
--- a/src/zmq.cpp
+++ b/src/zmq.cpp
@@ -340,6 +340,25 @@ size_t zmq_msg_size (zmq_msg_t *msg_)
     return ((zmq::msg_t*) msg_)->size ();
 }
 
+int zmq_getmsgopt (zmq_msg_t *msg_, int option_, void *optval_,
+    size_t *optvallen_)
+{
+    switch (option_) {
+    case ZMQ_MORE:
+        if (*optvallen_ < sizeof (int)) {
+            errno = EINVAL;
+            return -1;
+        }
+        *((int*) optval_) =
+            (((zmq::msg_t*) msg_)->flags () & zmq::msg_t::more) ? 1 : 0;
+        *optvallen_ = sizeof (int);
+        return 0;
+    default:
+        errno = EINVAL;
+        return -1;
+    }
+}
+
 int zmq_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
 {
 #if defined ZMQ_POLL_BASED_ON_POLL