------------------------------------------------------------------------------ -- -- -- GNAT RUNTIME COMPONENTS -- -- -- -- S Y S T E M . W I D _ E N U M -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2001 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. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with Unchecked_Conversion; package body System.Wid_Enum is ------------------------- -- Width_Enumeration_8 -- ------------------------- function Width_Enumeration_8 (Names : String; Indexes : System.Address; Lo, Hi : Natural) return Natural is pragma Warnings (Off, Names); W : Natural; 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 Unchecked_Conversion (System.Address, Index_Table_Ptr); IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes); begin W := 0; for J in Lo .. Hi loop W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J))); end loop; return W; end Width_Enumeration_8; -------------------------- -- Width_Enumeration_16 -- -------------------------- function Width_Enumeration_16 (Names : String; Indexes : System.Address; Lo, Hi : Natural) return Natural is pragma Warnings (Off, Names); W : Natural; 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 Unchecked_Conversion (System.Address, Index_Table_Ptr); IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes); begin W := 0; for J in Lo .. Hi loop W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J))); end loop; return W; end Width_Enumeration_16; -------------------------- -- Width_Enumeration_32 -- -------------------------- function Width_Enumeration_32 (Names : String; Indexes : System.Address; Lo, Hi : Natural) return Natural is pragma Warnings (Off, Names); W : Natural; 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 Unchecked_Conversion (System.Address, Index_Table_Ptr); IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes); begin W := 0; for J in Lo .. Hi loop W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J))); end loop; return W; end Width_Enumeration_32; end System.Wid_Enum;