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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT RUN-TIME COMPONENTS                         --
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--                                                                          --
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--                      S Y S T E M . I M G _ E N U M                       --
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--                                                                          --
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--                                 S p e c                                  --
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--                                                                          --
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--          Copyright (C) 2000-2009, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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--  Enumeration_Type'Image for all enumeration types except those in package
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--  Standard (where we have no opportunity to build image tables), and in
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--  package System (where it is too early to start building image tables).
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--  Special routines exist for the enumeration types in these packages.
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--  Note: this is an obsolete package, replaced by System.Img_Enum_New, which
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--  provides procedures instead of functions for these enumeration image calls.
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--  The reason we maintain this package is that when bootstrapping with old
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--  compilers, the old compiler will search for this unit, expecting to find
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--  these functions. The new compiler will search for procedures in the new
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--  version of the unit.
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pragma Compiler_Unit;
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package System.Img_Enum is
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   pragma Pure;
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   function Image_Enumeration_8
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     (Pos     : Natural;
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      Names   : String;
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      Indexes : System.Address) return String;
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   --  Used to compute Enum'Image (Str) where Enum is some enumeration type
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   --  other than those defined in package Standard. Names is a string with a
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   --  lower bound of 1 containing the characters of all the enumeration
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   --  literals concatenated together in sequence. Indexes is the address of an
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   --  array of type array (0 .. N) of Natural_8, where N is the number of
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   --  enumeration literals in the type. The Indexes values are the starting
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   --  subscript of each enumeration literal, indexed by Pos values, with an
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   --  extra entry at the end containing Names'Length + 1. The reason that
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   --  Indexes is passed by address is that the actual type is created on the
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   --  fly by the expander. The value returned is the desired 'Image value.
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   function Image_Enumeration_16
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     (Pos     : Natural;
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      Names   : String;
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      Indexes : System.Address) return String;
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   --  Identical to Image_Enumeration_8 except that it handles types
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   --  using array (0 .. Num) of Natural_16 for the Indexes table.
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   function Image_Enumeration_32
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     (Pos     : Natural;
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      Names   : String;
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      Indexes : System.Address) return String;
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   --  Identical to Image_Enumeration_8 except that it handles types
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   --  using array (0 .. Num) of Natural_32 for the Indexes table.
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end System.Img_Enum;

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