New fill constructor for message_t

New fill constructor: message_t(const void *data, size_t size). Constructs a new message of the given size and copies the data to the message body. In addition a new rebuild() function that does the same for an already constructed object

Author: K0n63n

zmq.hpp

@@ -227,6 +227,14 @@ namespace zmq
             }
         }
 
+        inline message_t (const void *data_, size_t size_)
+        {
+            int rc = zmq_msg_init_size (&msg, size_);
+            if (rc != 0)
+                throw error_t ();
+            memcpy(data(), data_, size_);
+        }
+
         inline message_t (void *data_, size_t size_, free_fn *ffn_,
             void *hint_ = NULL)
         {
@@ -276,6 +284,17 @@ namespace zmq
                 throw error_t ();
         }
 
+        inline void rebuild (const void *data_, size_t size_)
+        {
+            int rc = zmq_msg_close (&msg);
+            if (rc != 0)
+                throw error_t ();
+            rc = zmq_msg_init_size (&msg, size_);
+            if (rc != 0)
+                throw error_t ();
+            memcpy(data(), data_, size_);
+        }
+
         inline void rebuild (void *data_, size_t size_, free_fn *ffn_,
             void *hint_ = NULL)
         {