1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--                A D A . T E X T _ I O . C _ S T R E A M S                 --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--          Copyright (C) 1992-2002 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 2,  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.  See the GNU General Public License --
17-- for  more details.  You should have  received  a copy of the GNU General --
18-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
19-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
20-- MA 02111-1307, USA.                                                      --
21--                                                                          --
22-- As a special exception,  if other files  instantiate  generics from this --
23-- unit, or you link  this unit with other files  to produce an executable, --
24-- this  unit  does not  by itself cause  the resulting  executable  to  be --
25-- covered  by the  GNU  General  Public  License.  This exception does not --
26-- however invalidate  any other reasons why  the executable file  might be --
27-- covered by the  GNU Public License.                                      --
28--                                                                          --
29-- GNAT was originally developed  by the GNAT team at  New York University. --
30-- Extensive contributions were provided by Ada Core Technologies Inc.      --
31--                                                                          --
32------------------------------------------------------------------------------
33
34with Interfaces.C_Streams; use Interfaces.C_Streams;
35with System.File_IO;
36with System.File_Control_Block;
37with Unchecked_Conversion;
38
39package body Ada.Text_IO.C_Streams is
40
41   package FIO renames System.File_IO;
42   package FCB renames System.File_Control_Block;
43
44   subtype AP is FCB.AFCB_Ptr;
45
46   function To_FCB is new 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 : Text_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   => 'T',
81                Creat     => False,
82                Text      => True,
83                C_Stream  => C_Stream);
84   end Open;
85
86end Ada.Text_IO.C_Streams;
87