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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) 1992-2009, 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 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. --
+-- --
+------------------------------------------------------------------------------
+
+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_IO instance has access values");
+
+ pragma Compile_Time_Warning
+ (Element_Type'Has_Tagged_Values,
+ "Element_Type for Direct_IO instance has tagged 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 : File_Mode := Inout_File;
+ Name : String := "";
+ Form : String := "");
+
+ procedure Open
+ (File : in out File_Type;
+ Mode : File_Mode;
+ Name : String;
+ Form : String := "");
+
+ procedure Close (File : in out File_Type);
+ procedure Delete (File : in out File_Type);
+ procedure Reset (File : in out File_Type; Mode : File_Mode);
+ procedure Reset (File : in out File_Type);
+
+ function Mode (File : File_Type) return File_Mode;
+ function Name (File : File_Type) return String;
+ function Form (File : File_Type) return String;
+
+ function Is_Open (File : File_Type) return Boolean;
+
+ ---------------------------------
+ -- Input and Output Operations --
+ ---------------------------------
+
+ procedure Read
+ (File : File_Type;
+ Item : out Element_Type;
+ From : Positive_Count);
+
+ procedure Read
+ (File : File_Type;
+ Item : out Element_Type);
+
+ procedure Write
+ (File : File_Type;
+ Item : Element_Type;
+ To : Positive_Count);
+
+ procedure Write
+ (File : File_Type;
+ Item : Element_Type);
+
+ procedure Set_Index (File : File_Type; To : Positive_Count);
+
+ function Index (File : File_Type) return Positive_Count;
+ function Size (File : File_Type) return Count;
+
+ function End_Of_File (File : 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
+
+ -- The following procedures have a File_Type formal of mode IN OUT because
+ -- they may close the original file. The Close operation may raise an
+ -- exception, but in that case we want any assignment to the formal to
+ -- be effective anyway, so it must be passed by reference (or the caller
+ -- will be left with a dangling pointer).
+
+ pragma Export_Procedure
+ (Internal => Close,
+ External => "",
+ Mechanism => Reference);
+ pragma Export_Procedure
+ (Internal => Delete,
+ External => "",
+ Mechanism => Reference);
+ pragma Export_Procedure
+ (Internal => Reset,
+ External => "",
+ Parameter_Types => (File_Type),
+ Mechanism => Reference);
+ pragma Export_Procedure
+ (Internal => Reset,
+ External => "",
+ Parameter_Types => (File_Type, File_Mode),
+ Mechanism => (File => Reference));
+
+ type File_Type is new System.Direct_IO.File_Type;
+
+ Bytes : constant Interfaces.C_Streams.size_t :=
+ Interfaces.C_Streams.size_t'Max
+ (1, Element_Type'Max_Size_In_Storage_Elements);
+ -- Size of an element in storage units. The Max operation here is to ensure
+ -- that we allocate a single byte for zero-sized elements. It's a bit weird
+ -- to instantiate Direct_IO with zero sized elements, but it is legal and
+ -- this adjustment ensures that we don't get anomalous behavior.
+
+ 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;