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------------------------------------------------------------------------------
-- --
-- GNAT RUNTIME COMPONENTS --
-- --
-- S Y S T E M . W I D _ E N U M --
-- --
-- S p e c --
-- --
-- $Revision: 1.7 $ --
-- --
-- Copyright (C) 1992,1993,1994,1995,1996 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 2, 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
with Unchecked_Conversion;
package body System.Wid_Enum is
-----------------------
-- Width_Enumeration --
-----------------------
function Width_Enumeration
(Table : Address;
Lo, Hi : Natural)
return Natural
is
type String_Access is access String;
for String_Access'Size use Standard'Address_Size;
type Enum_Table is array (Natural) of String_Access;
type Enum_Table_Ptr is access Enum_Table;
function A_To_T is new Unchecked_Conversion (Address, Enum_Table_Ptr);
T : constant Enum_Table_Ptr := A_To_T (Table);
W : Natural;
begin
W := 0;
for J in Lo .. Hi loop
W := Natural'Max (W, T (J)'Length);
end loop;
return W;
end Width_Enumeration;
end System.Wid_Enum;
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