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------------------------------------------------------------------------------

--                                                                          --

--                         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) 1992-2005, 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,  51  Franklin  Street,  Fifth  Floor, --

-- Boston, MA 02110-1301, 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.      --

--                                                                          --

------------------------------------------------------------------------------

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;