--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/s-widwch.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,104 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                     S Y S T E M . W I D _ W C H A R                      --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package body System.Wid_WChar is
+
+   --------------------------
+   -- Width_Wide_Character --
+   --------------------------
+
+   function Width_Wide_Character
+     (Lo, Hi : Wide_Character) return Natural
+   is
+      W : Natural;
+      P : Natural;
+
+   begin
+      W := 0;
+      for C in Lo .. Hi loop
+         P := Wide_Character'Pos (C);
+
+         --  Here if we find a character in wide character range
+         --  Width is max value (12) for Hex_hhhhhhhh
+
+         if P > 16#FF# then
+            return 12;
+
+            --  If we are in character range then use length of character image
+
+         else
+            declare
+               S : constant String := Character'Image (Character'Val (P));
+            begin
+               W := Natural'Max (W, S'Length);
+            end;
+         end if;
+      end loop;
+
+      return W;
+   end Width_Wide_Character;
+
+   -------------------------------
+   -- Width_Wide_Wide_Character --
+   -------------------------------
+
+   function Width_Wide_Wide_Character
+     (Lo, Hi : Wide_Wide_Character) return Natural
+   is
+      W : Natural;
+      P : Natural;
+
+   begin
+      W := 0;
+      for C in Lo .. Hi loop
+         P := Wide_Wide_Character'Pos (C);
+
+         --  Here if we find a character in wide wide character range.
+         --  Width is max value (12) for Hex_hhhhhhhh
+
+         if P > 16#FF# then
+            W := 12;
+
+         --  If we are in character range then use length of character image
+
+         else
+            declare
+               S : constant String := Character'Image (Character'Val (P));
+            begin
+               W := Natural'Max (W, S'Length);
+            end;
+         end if;
+      end loop;
+
+      return W;
+   end Width_Wide_Wide_Character;
+
+end System.Wid_WChar;