| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . W I D _ E N U M -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1992-2009, 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. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| with Ada.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 Ada.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 Ada.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 Ada.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; |
