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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME COMPONENTS --
+-- --
+-- S Y S T E M . I M G _ E N U M --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 2000-2009, Free Software Foundation, Inc. --
+-- --
+-- GNAT is free software; you can redistribute it and/or modify it under --
+-- terms of the GNU General Public License as published by the Free Soft- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
+-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+pragma Compiler_Unit;
+
+with Ada.Unchecked_Conversion;
+
+package body System.Img_Enum is
+
+ -------------------------
+ -- Image_Enumeration_8 --
+ -------------------------
+
+ function Image_Enumeration_8
+ (Pos : Natural;
+ Names : String;
+ Indexes : System.Address)
+ return String
+ is
+ type Natural_8 is range 0 .. 2 ** 7 - 1;
+ type Index_Table is array (Natural) of Natural_8;
+ type Index_Table_Ptr is access Index_Table;
+
+ function To_Index_Table_Ptr is
+ new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+ IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+ Start : constant Natural := Natural (IndexesT (Pos));
+ Next : constant Natural := Natural (IndexesT (Pos + 1));
+
+ subtype Result_Type is String (1 .. Next - Start);
+ -- We need this result type to force the result to have the
+ -- required lower bound of 1, rather than the slice bounds.
+
+ begin
+ return Result_Type (Names (Start .. Next - 1));
+ end Image_Enumeration_8;
+
+ --------------------------
+ -- Image_Enumeration_16 --
+ --------------------------
+
+ function Image_Enumeration_16
+ (Pos : Natural;
+ Names : String;
+ Indexes : System.Address)
+ return String
+ is
+ type Natural_16 is range 0 .. 2 ** 15 - 1;
+ type Index_Table is array (Natural) of Natural_16;
+ type Index_Table_Ptr is access Index_Table;
+
+ function To_Index_Table_Ptr is
+ new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+ IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+ Start : constant Natural := Natural (IndexesT (Pos));
+ Next : constant Natural := Natural (IndexesT (Pos + 1));
+
+ subtype Result_Type is String (1 .. Next - Start);
+ -- We need this result type to force the result to have the
+ -- required lower bound of 1, rather than the slice bounds.
+
+ begin
+ return Result_Type (Names (Start .. Next - 1));
+ end Image_Enumeration_16;
+
+ --------------------------
+ -- Image_Enumeration_32 --
+ --------------------------
+
+ function Image_Enumeration_32
+ (Pos : Natural;
+ Names : String;
+ Indexes : System.Address)
+ return String
+ is
+ type Natural_32 is range 0 .. 2 ** 31 - 1;
+ type Index_Table is array (Natural) of Natural_32;
+ type Index_Table_Ptr is access Index_Table;
+
+ function To_Index_Table_Ptr is
+ new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+ IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+ Start : constant Natural := Natural (IndexesT (Pos));
+ Next : constant Natural := Natural (IndexesT (Pos + 1));
+
+ subtype Result_Type is String (1 .. Next - Start);
+ -- We need this result type to force the result to have the
+ -- required lower bound of 1, rather than the slice bounds.
+
+ begin
+ return Result_Type (Names (Start .. Next - 1));
+ end Image_Enumeration_32;
+
+end System.Img_Enum;