Pointers in Ada

[di98mase@hotmail.com (Sebastian)]

Hi I have a question about how to initliaze a message that I want to
send. The code below shows my types and all, but my concern is the
syntax, how do I write the code that initializes the message so that I
can call the Put_Message procedure?


-- This is MDP_LLD package....
package Mdp_Lld;
  type Message_Header is
     record
       Word_Count              : Byte;
       Command_Id              : Byte;
     end record;

     subtype Mdp_Message_Data is Byte(1..500);

     type A_Mdp_Message is
        record
          Header : aliased Message_Header;
          Data   : aliased Mdp_Message_Data;
        end record;

     type Driver_Msg_Ptr_Type is access all A_MDP_Message;

     procedure Put_Message
        (Msg_Buffer_Ptr : in out Client_Msg_Ptr_Type;
);

private

  type Client_Msg_Ptr_Type is new Driver_Msg_Ptr_Type;

end Mdp_Lld;



-- this is another file
with Mdp_lld; use Mdp_lld;

procedure Test_Driver is
   Output_Msg      : Mdp_Lld.A_Mdp_Message;
   Mdp_Msg_Ptr_Out : MDP_LLD.Client_Msg_Ptr_Type;
begin

   -- Initialize output message
   Output_Msg.Header.Word_Count  := 32; 
   Output_Msg.Header.Command_Id  := 4; 
 
   -- How do I Initialize my message to send?
   Mdp_Msg_Ptr_Out'access := Output_Msg; --this does not work?
   Mdp_Msg_Ptr_Out.all    := Output_Msg; --this does not work?

end;