1------------------------------------------------------------------------------
2--                                                                          --
3--                        GNAT RUN-TIME COMPONENTS                          --
4--                                                                          --
5--          A D A . S E Q U E N T I A L _ I O . C _ S T R E A M S           --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--          Copyright (C) 1992-2018, Free Software Foundation, Inc.         --
10--                                                                          --
11-- GNAT is free software;  you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNAT was originally developed  by the GNAT team at  New York University. --
28-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29--                                                                          --
30------------------------------------------------------------------------------
31
32with Interfaces.C_Streams; use Interfaces.C_Streams;
33with System.File_IO;
34with System.File_Control_Block;
35with System.Sequential_IO;
36with Ada.Unchecked_Conversion;
37
38package body Ada.Sequential_IO.C_Streams is
39
40   package FIO renames System.File_IO;
41   package FCB renames System.File_Control_Block;
42   package SIO renames System.Sequential_IO;
43
44   subtype AP is FCB.AFCB_Ptr;
45
46   function To_FCB is new Ada.Unchecked_Conversion (File_Mode, FCB.File_Mode);
47
48   --------------
49   -- C_Stream --
50   --------------
51
52   function C_Stream (F : File_Type) return FILEs is
53   begin
54      FIO.Check_File_Open (AP (F));
55      return F.Stream;
56   end C_Stream;
57
58   ----------
59   -- Open --
60   ----------
61
62   procedure Open
63     (File     : in out File_Type;
64      Mode     : File_Mode;
65      C_Stream : FILEs;
66      Form     : String := "";
67      Name     : String := "")
68   is
69      Dummy_File_Control_Block : SIO.Sequential_AFCB;
70      pragma Warnings (Off, Dummy_File_Control_Block);
71      --  Yes, we know this is never assigned a value, only the tag
72      --  is used for dispatching purposes, so that's expected.
73
74   begin
75      FIO.Open (File_Ptr  => AP (File),
76                Dummy_FCB => Dummy_File_Control_Block,
77                Mode      => To_FCB (Mode),
78                Name      => Name,
79                Form      => Form,
80                Amethod   => 'Q',
81                Creat     => False,
82                Text      => False,
83                C_Stream  => C_Stream);
84   end Open;
85
86end Ada.Sequential_IO.C_Streams;
87