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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME COMPONENTS --
+-- --
+-- A D A . D I R E C T _ I O . C _ S T R E A M S --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 1992-2009, 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. --
+-- --
+------------------------------------------------------------------------------
+
+with Interfaces.C_Streams; use Interfaces.C_Streams;
+with System.File_IO;
+with System.File_Control_Block;
+with System.Direct_IO;
+with Ada.Unchecked_Conversion;
+
+package body Ada.Direct_IO.C_Streams is
+
+ package FIO renames System.File_IO;
+ package FCB renames System.File_Control_Block;
+ package DIO renames System.Direct_IO;
+
+ subtype AP is FCB.AFCB_Ptr;
+
+ function To_FCB is new Ada.Unchecked_Conversion (File_Mode, FCB.File_Mode);
+
+ --------------
+ -- C_Stream --
+ --------------
+
+ function C_Stream (F : File_Type) return FILEs is
+ begin
+ FIO.Check_File_Open (AP (F));
+ return F.Stream;
+ end C_Stream;
+
+ ----------
+ -- Open --
+ ----------
+
+ procedure Open
+ (File : in out File_Type;
+ Mode : File_Mode;
+ C_Stream : FILEs;
+ Form : String := "";
+ Name : String := "")
+ is
+ Dummy_File_Control_Block : DIO.Direct_AFCB;
+ pragma Warnings (Off, Dummy_File_Control_Block);
+ -- Yes, we know this is never assigned a value, only the tag
+ -- is used for dispatching purposes, so that's expected.
+
+ begin
+ FIO.Open (File_Ptr => AP (File),
+ Dummy_FCB => Dummy_File_Control_Block,
+ Mode => To_FCB (Mode),
+ Name => Name,
+ Form => Form,
+ Amethod => 'D',
+ Creat => False,
+ Text => False,
+ C_Stream => C_Stream);
+
+ File.Bytes := Bytes;
+ end Open;
+
+end Ada.Direct_IO.C_Streams;