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

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                   I N T E R F A C E S . F O R T R A N                    --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

-- This specification is derived from the Ada Reference Manual for use with --

-- GNAT.  In accordance with the copyright of that document, you can freely --

-- copy and modify this specification,  provided that if you redistribute a --

-- modified version,  any changes that you have made are clearly indicated. --

--                                                                          --

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

with Ada.Numerics.Generic_Complex_Types;

pragma Elaborate_All (Ada.Numerics.Generic_Complex_Types);

package Interfaces.Fortran is

   pragma Pure;

   type Fortran_Integer  is new Integer;

   type Real             is new Float;

   type Double_Precision is new Long_Float;

   type Logical is new Boolean;

   for Logical'Size use Integer'Size;

   pragma Convention (Fortran, Logical);

   --  As required by Fortran standard, stand alone logical allocates same

   --  space as integer (but what about the array case???). The convention

   --  is important, since in Fortran, Booleans have zero/non-zero semantics

   --  for False/True, and the pragma Convention (Fortran) activates the

   --  special handling required in this case.

   package Single_Precision_Complex_Types is

      new Ada.Numerics.Generic_Complex_Types (Real);

   package Double_Precision_Complex_Types is

      new Ada.Numerics.Generic_Complex_Types (Double_Precision);

   type Complex is new Single_Precision_Complex_Types.Complex;

   type Double_Complex is new Double_Precision_Complex_Types.Complex;

   subtype Imaginary is Single_Precision_Complex_Types.Imaginary;

   i : Imaginary renames Single_Precision_Complex_Types.i;

   j : Imaginary renames Single_Precision_Complex_Types.j;

   type Character_Set is new Character;

   type Fortran_Character is array (Positive range <>) of Character_Set;

   function To_Fortran (Item : Character)     return Character_Set;

   function To_Ada     (Item : Character_Set) return Character;

   function To_Fortran (Item : String)            return Fortran_Character;

   function To_Ada     (Item : Fortran_Character) return String;

   procedure To_Fortran

     (Item   : String;

      Target : out Fortran_Character;

      Last   : out Natural);

   procedure To_Ada

     (Item   : Fortran_Character;

      Target : out String;

      Last   : out Natural);

end Interfaces.Fortran;