* config/alpha/alpha.c, config/alpha/alpha.md,
[official-gcc.git] / gcc / ada / a-diocst.adb
blob4e75d24cc889e5429b2ec74cd45ff6233cdeaae5
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- A D A . D I R E C 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, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, 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 ------------------------------------------------------------------------------
34 with Interfaces.C_Streams; use Interfaces.C_Streams;
35 with System.File_IO;
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);
50 --------------
51 -- C_Stream --
52 --------------
54 function C_Stream (F : File_Type) return FILEs is
55 begin
56 FIO.Check_File_Open (AP (F));
57 return F.Stream;
58 end C_Stream;
60 ----------
61 -- Open --
62 ----------
64 procedure Open
65 (File : in out File_Type;
66 Mode : File_Mode;
67 C_Stream : FILEs;
68 Form : String := "";
69 Name : String := "")
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.
76 begin
77 FIO.Open (File_Ptr => AP (File),
78 Dummy_FCB => Dummy_File_Control_Block,
79 Mode => To_FCB (Mode),
80 Name => Name,
81 Form => Form,
82 Amethod => 'D',
83 Creat => False,
84 Text => False,
85 C_Stream => C_Stream);
87 File.Bytes := Bytes;
88 end Open;
90 end Ada.Direct_IO.C_Streams;