Manpages - zmq_msg_more.3

zmq_msg_more - indicate if there are more message parts to receive

int zmq_msg_more (zmq_msg_t */*message/);*

The zmq_msg_more() function indicates whether this is part of a multi-part message, and there are further parts to receive. This method can safely be called after zmq_msg_close(). This method is identical to zmq_msg_get() with an argument of ZMQ_MORE.

The zmq_msg_more() function shall return zero if this is the final part of a multi-part message, or the only part of a single-part message. It shall return 1 if there are further parts to receive.

Receiving a multi-part message.

    zmq_msg_t part;
    while (true) {
        //  Create an empty 0MQ message to hold the message part
        int rc = zmq_msg_init (&part);
        assert (rc == 0);
        //  Block until a message is available to be received from socket
        rc = zmq_msg_recv (socket, &part, 0);
        assert (rc != -1);
        if (zmq_msg_more (&part))
            fprintf (stderr, "more\n");
        else {
            fprintf (stderr, "end\n");
            break;
        }
        zmq_msg_close (&part);
    }

*zmq_msg_get*(3) *zmq_msg_set*(3) *zmq_msg_init*(3) *zmq_msg_close*(3) *zmq*(7)

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