File : s-sequio.ads
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- S Y S T E M . S E Q U E N T I A L _ I O --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 1992-2009, 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 -- --
19 -- --
20 -- --
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
32 -- This package contains the declaration of the control block used for
33 -- Sequential_IO. This must be declared at the outer library level. It also
34 -- contains code that is shared between instances of Sequential_IO.
35
36 with System.File_Control_Block;
37 with Ada.Streams;
38
39 package System.Sequential_IO is
40
41 package FCB renames System.File_Control_Block;
42
43 type Sequential_AFCB is new FCB.AFCB with null record;
44 -- No additional fields required for Sequential_IO
45
46 function AFCB_Allocate
47 (Control_Block : Sequential_AFCB) return FCB.AFCB_Ptr;
48
49 procedure AFCB_Close (File : not null access Sequential_AFCB);
50 procedure AFCB_Free (File : not null access Sequential_AFCB);
51
52 procedure Read
53 (File : in out Sequential_AFCB;
54 Item : out Ada.Streams.Stream_Element_Array;
55 Last : out Ada.Streams.Stream_Element_Offset);
56 -- Required overriding of Read, not actually used for Sequential_IO
57
58 procedure Write
59 (File : in out Sequential_AFCB;
60 Item : Ada.Streams.Stream_Element_Array);
61 -- Required overriding of Write, not actually used for Sequential_IO
62
63 type File_Type is access all Sequential_AFCB;
64 -- File_Type in individual instantiations is derived from this type
65
66 procedure Create
67 (File : in out File_Type;
68 Mode : FCB.File_Mode := FCB.Out_File;
69 Name : String := "";
70 Form : String := "");
71
72 procedure Open
73 (File : in out File_Type;
74 Mode : FCB.File_Mode;
75 Name : String;
76 Form : String := "");
77
78 end System.Sequential_IO;