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From: "David Botton" <David@Botton.com>
Newsgroups: comp.lang.ada
Subject: Re: A copy question....
Date: Tue, 16 Oct 2001 19:00:47 -0400
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Date: 2001-10-16T19:00:47-04:00
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----- Original Message -----
From: "Zebylon" <sebastian.madunic@esavionics.se>
> Is there some smart way of placing the data in the array...?

This is my favorite method and if you don't need a copy, but just an easy
way to access the memory, you can just use the returned Pointer_To_The_Array
directly instead of copying it.

I think the compiler will likely figure out the best way to make the block
copy on the platform :-)


with GNAT.IO; use GNAT.IO;

with Ada.Unchecked_Conversion;

with System;
with Interfaces;

procedure Block is

   type My_Array is array (Integer range <>) of Interfaces.Unsigned_32;

   Stuff_In_Memory : My_Array (1 .. 200) := (others => 999);

   Address     : System.Address := Stuff_In_Memory (1)'Address;
   Data_Length : Natural := Stuff_In_Memory'Length;

   type The_Array is new My_Array (1 .. Data_Length);
   type Pointer_To_The_Array is access all The_Array;

   function To_Pointer_To_The_Array is
      new Ada.Unchecked_Conversion (System.Address, Pointer_To_The_Array);

   Copied_Array : The_Array := To_Pointer_To_The_Array (Address).all;
begin
   for N in Copied_Array'Range loop
      Put_Line (Copied_Array (N)'Img);
   end loop;
end Block;