--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/s-wwdenu.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,98 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                      S Y S T E M . W W D _ E N U M                       --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2017, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package contains routines used for Enumeration_Type'Wide_[Wide_]Width
+
+with System.WCh_Con;
+
+package System.WWd_Enum is
+   pragma Pure;
+
+   function Wide_Width_Enumeration_8
+     (Names   : String;
+      Indexes : System.Address;
+      Lo, Hi  : Natural;
+      EM      : System.WCh_Con.WC_Encoding_Method) return Natural;
+   --  Used to compute Enum'Wide_Width where Enum is an enumeration subtype
+   --  other than those defined in package Standard. Names is a string with
+   --  a lower bound of 1 containing the characters of all the enumeration
+   --  literals concatenated together in sequence. Indexes is the address
+   --  of an array of type array (0 .. N) of Natural_8, where N is the
+   --  number of enumeration literals in the type. The Indexes values are
+   --  the starting subscript of each enumeration literal, indexed by Pos
+   --  values, with an extra entry at the end containing Names'Length + 1.
+   --  The reason that Indexes is passed by address is that the actual type
+   --  is created on the fly by the expander.
+   --
+   --  Lo and Hi are the Pos values of the lower and upper bounds of the
+   --  subtype. The result is the value of Width, i.e. the maximum value
+   --  of the length of any enumeration literal in the given range. The
+   --  fifth parameter, EM, is the wide character encoding method used in
+   --  the Names table.
+
+   function Wide_Width_Enumeration_16
+     (Names   : String;
+      Indexes : System.Address;
+      Lo, Hi  : Natural;
+      EM      : System.WCh_Con.WC_Encoding_Method) return Natural;
+   --  Identical to Wide_Width_Enumeration_8 except that it handles types
+   --  using array (0 .. Num) of Natural_16 for the Indexes table.
+
+   function Wide_Width_Enumeration_32
+     (Names   : String;
+      Indexes : System.Address;
+      Lo, Hi  : Natural;
+      EM      : System.WCh_Con.WC_Encoding_Method) return Natural;
+   --  Identical to Wide_Width_Enumeration_8 except that it handles types
+   --  using array (0 .. Num) of Natural_32 for the Indexes table.
+
+   function Wide_Wide_Width_Enumeration_8
+     (Names   : String;
+      Indexes : System.Address;
+      Lo, Hi  : Natural;
+      EM      : System.WCh_Con.WC_Encoding_Method) return Natural;
+   --  Same function for Wide_Wide_Width attribute
+
+   function Wide_Wide_Width_Enumeration_16
+     (Names   : String;
+      Indexes : System.Address;
+      Lo, Hi  : Natural;
+      EM      : System.WCh_Con.WC_Encoding_Method) return Natural;
+   --  Same function for Wide_Wide_Width attribute
+
+   function Wide_Wide_Width_Enumeration_32
+     (Names   : String;
+      Indexes : System.Address;
+      Lo, Hi  : Natural;
+      EM      : System.WCh_Con.WC_Encoding_Method) return Natural;
+   --  Same function for Wide_Wide_Width attribute
+
+end System.WWd_Enum;