--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/i-fortra.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,142 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                   I N T E R F A C E S . F O R T R A N                    --
+--                                                                          --
+--                                 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 Interfaces.Fortran is
+
+   ------------
+   -- To_Ada --
+   ------------
+
+   --  Single character case
+
+   function To_Ada (Item : Character_Set) return Character is
+   begin
+      return Character (Item);
+   end To_Ada;
+
+   --  String case (function returning converted result)
+
+   function To_Ada (Item : Fortran_Character) return String is
+      T : String (1 .. Item'Length);
+
+   begin
+      for J in T'Range loop
+         T (J) := Character (Item (J - 1 + Item'First));
+      end loop;
+
+      return T;
+   end To_Ada;
+
+   --  String case (procedure copying converted string to given buffer)
+
+   procedure To_Ada
+     (Item   : Fortran_Character;
+      Target : out String;
+      Last   : out Natural)
+   is
+   begin
+      if Item'Length = 0 then
+         Last := 0;
+         return;
+
+      elsif Target'Length = 0 then
+         raise Constraint_Error;
+
+      else
+         Last := Target'First - 1;
+
+         for J in Item'Range loop
+            Last := Last + 1;
+
+            if Last > Target'Last then
+               raise Constraint_Error;
+            else
+               Target (Last) := Character (Item (J));
+            end if;
+         end loop;
+      end if;
+   end To_Ada;
+
+   ----------------
+   -- To_Fortran --
+   ----------------
+
+   --  Character case
+
+   function To_Fortran (Item : Character) return Character_Set is
+   begin
+      return Character_Set (Item);
+   end To_Fortran;
+
+   --  String case (function returning converted result)
+
+   function To_Fortran (Item : String) return Fortran_Character is
+      T : Fortran_Character (1 .. Item'Length);
+
+   begin
+      for J in T'Range loop
+         T (J) := Character_Set (Item (J - 1 + Item'First));
+      end loop;
+
+      return T;
+   end To_Fortran;
+
+   --  String case (procedure copying converted string to given buffer)
+
+   procedure To_Fortran
+     (Item   : String;
+      Target : out Fortran_Character;
+      Last   : out Natural)
+   is
+   begin
+      if Item'Length = 0 then
+         Last := 0;
+         return;
+
+      elsif Target'Length = 0 then
+         raise Constraint_Error;
+
+      else
+         Last := Target'First - 1;
+
+         for J in Item'Range loop
+            Last := Last + 1;
+
+            if Last > Target'Last then
+               raise Constraint_Error;
+            else
+               Target (Last) := Character_Set (Item (J));
+            end if;
+         end loop;
+      end if;
+   end To_Fortran;
+
+end Interfaces.Fortran;