1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- S Y S T E M . S E Q U E N T I A L _ I O --
11 -- Copyright (C) 1992,1993,1994 Free Software Foundation, Inc. --
13 -- GNAT is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNAT; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 -- This package contains the declaration of the control block used for
37 -- Seqential_IO. This must be declared at the outer library level. It also
38 -- contains code that is shared between instances of Sequential_IO.
40 with System.File_Control_Block;
43 package System.Sequential_IO is
45 package FCB renames System.File_Control_Block;
47 type Sequential_AFCB is new FCB.AFCB with null record;
48 -- No additional fields required for Sequential_IO
50 function AFCB_Allocate
51 (Control_Block : Sequential_AFCB)
54 procedure AFCB_Close (File : access Sequential_AFCB);
55 procedure AFCB_Free (File : access Sequential_AFCB);
58 (File : in out Sequential_AFCB;
59 Item : out Ada.Streams.Stream_Element_Array;
60 Last : out Ada.Streams.Stream_Element_Offset);
61 -- Required overriding of Read, not actually used for Sequential_IO
64 (File : in out Sequential_AFCB;
65 Item : in Ada.Streams.Stream_Element_Array);
66 -- Required overriding of Write, not actually used for Sequential_IO
68 type File_Type is access all Sequential_AFCB;
69 -- File_Type in individual instantiations is derived from this type
72 (File : in out File_Type;
73 Mode : in FCB.File_Mode := FCB.Out_File;
74 Name : in String := "";
75 Form : in String := "");
78 (File : in out File_Type;
79 Mode : in FCB.File_Mode;
81 Form : in String := "");
83 end System.Sequential_IO;