1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- A D A . D I R E C T _ I O . C _ S T R E A M S --
9 -- Copyright (C) 1992-2002 Free Software Foundation, Inc. --
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, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
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. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with Interfaces
.C_Streams
; use Interfaces
.C_Streams
;
36 with System
.File_Control_Block
;
37 with System
.Direct_IO
;
38 with Unchecked_Conversion
;
40 package body Ada
.Direct_IO
.C_Streams
is
42 package FIO
renames System
.File_IO
;
43 package FCB
renames System
.File_Control_Block
;
44 package DIO
renames System
.Direct_IO
;
46 subtype AP
is FCB
.AFCB_Ptr
;
48 function To_FCB
is new Unchecked_Conversion
(File_Mode
, FCB
.File_Mode
);
54 function C_Stream
(F
: File_Type
) return FILEs
is
56 FIO
.Check_File_Open
(AP
(F
));
65 (File
: in out File_Type
;
71 Dummy_File_Control_Block
: DIO
.Direct_AFCB
;
72 pragma Warnings
(Off
, Dummy_File_Control_Block
);
73 -- Yes, we know this is never assigned a value, only the tag
74 -- is used for dispatching purposes, so that's expected.
77 FIO
.Open
(File_Ptr
=> AP
(File
),
78 Dummy_FCB
=> Dummy_File_Control_Block
,
79 Mode
=> To_FCB
(Mode
),
85 C_Stream
=> C_Stream
);
90 end Ada
.Direct_IO
.C_Streams
;