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

--                                                                          --

--                         GNAT RUN-TIME COMPONENTS                         --

--                                                                          --

--                        A D A . D I R E C T _ I O                         --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 1992-2005, Free Software Foundation, Inc.         --

--                                                                          --

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

-- GNAT. The copyright notice above, and the license provisions that follow --

-- apply solely to the  contents of the part following the private keyword. --

--                                                                          --

-- 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.      --

--                                                                          --

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

with Ada.IO_Exceptions;

with System.Direct_IO;

with Interfaces.C_Streams;

generic

   type Element_Type is private;

package Ada.Direct_IO is

   pragma Compile_Time_Warning

     (Element_Type'Has_Access_Values,

      "?Element_Type for Direct_'I'O instance has access values");

   type File_Type is limited private;

   type File_Mode is (In_File, Inout_File, Out_File);

   --  The following representation clause allows the use of unchecked

   --  conversion for rapid translation between the File_Mode type

   --  used in this package and System.File_IO.

   for File_Mode use

     (In_File    => 0,   -- System.File_IO.File_Mode'Pos (In_File)

      Inout_File => 1,   -- System.File_IO.File_Mode'Pos (Inout_File);

      Out_File   => 2);  -- System.File_IO.File_Mode'Pos (Out_File)

   type Count is range 0 .. System.Direct_IO.Count'Last;

   subtype Positive_Count is Count range 1 .. Count'Last;

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

   -- File Management --

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

   procedure Create

     (File : in out File_Type;

      Mode : in File_Mode := Inout_File;

      Name : in String := "";

      Form : in String := "");

   procedure Open

     (File : in out File_Type;

      Mode : in File_Mode;

      Name : in String;

      Form : in String := "");

   procedure Close  (File : in out File_Type);

   procedure Delete (File : in out File_Type);

   procedure Reset  (File : in out File_Type; Mode : in File_Mode);

   procedure Reset  (File : in out File_Type);

   function Mode (File : in File_Type) return File_Mode;

   function Name (File : in File_Type) return String;

   function Form (File : in File_Type) return String;

   function Is_Open (File : in File_Type) return Boolean;

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

   -- Input and Output Operations --

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

   procedure Read

     (File : in File_Type;

      Item : out Element_Type;

      From : in Positive_Count);

   procedure Read

     (File : in File_Type;

      Item : out Element_Type);

   procedure Write

     (File : in File_Type;

      Item : in Element_Type;

      To   : in Positive_Count);

   procedure Write

     (File : in File_Type;

      Item : in Element_Type);

   procedure Set_Index (File : in File_Type; To : in Positive_Count);

   function Index (File : in File_Type) return Positive_Count;

   function Size  (File : in File_Type) return Count;

   function End_Of_File (File : in File_Type) return Boolean;

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

   -- Exceptions --

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

   Status_Error : exception renames IO_Exceptions.Status_Error;

   Mode_Error   : exception renames IO_Exceptions.Mode_Error;

   Name_Error   : exception renames IO_Exceptions.Name_Error;

   Use_Error    : exception renames IO_Exceptions.Use_Error;

   Device_Error : exception renames IO_Exceptions.Device_Error;

   End_Error    : exception renames IO_Exceptions.End_Error;

   Data_Error   : exception renames IO_Exceptions.Data_Error;

private

   type File_Type is new System.Direct_IO.File_Type;

   Bytes : constant Interfaces.C_Streams.size_t :=

             Element_Type'Max_Size_In_Storage_Elements;

   --  Size of an element in storage units

   pragma Inline (Close);

   pragma Inline (Create);

   pragma Inline (Delete);

   pragma Inline (End_Of_File);

   pragma Inline (Form);

   pragma Inline (Index);

   pragma Inline (Is_Open);

   pragma Inline (Mode);

   pragma Inline (Name);

   pragma Inline (Open);

   pragma Inline (Read);

   pragma Inline (Reset);

   pragma Inline (Set_Index);

   pragma Inline (Size);

   pragma Inline (Write);

end Ada.Direct_IO;