1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- S Y S T E M . S E Q U E N T I A L _ I O --
10 -- Copyright (C) 1992,1993,1994 Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
35 -- This package contains the declaration of the control block used for
36 -- Seqential_IO. This must be declared at the outer library level. It also
37 -- contains code that is shared between instances of Sequential_IO.
39 with System
.File_Control_Block
;
42 package System
.Sequential_IO
is
44 package FCB
renames System
.File_Control_Block
;
46 type Sequential_AFCB
is new FCB
.AFCB
with null record;
47 -- No additional fields required for Sequential_IO
49 function AFCB_Allocate
50 (Control_Block
: Sequential_AFCB
)
53 procedure AFCB_Close
(File
: access Sequential_AFCB
);
54 procedure AFCB_Free
(File
: access Sequential_AFCB
);
57 (File
: in out Sequential_AFCB
;
58 Item
: out Ada
.Streams
.Stream_Element_Array
;
59 Last
: out Ada
.Streams
.Stream_Element_Offset
);
60 -- Required overriding of Read, not actually used for Sequential_IO
63 (File
: in out Sequential_AFCB
;
64 Item
: in Ada
.Streams
.Stream_Element_Array
);
65 -- Required overriding of Write, not actually used for Sequential_IO
67 type File_Type
is access all Sequential_AFCB
;
68 -- File_Type in individual instantiations is derived from this type
71 (File
: in out File_Type
;
72 Mode
: in FCB
.File_Mode
:= FCB
.Out_File
;
73 Name
: in String := "";
74 Form
: in String := "");
77 (File
: in out File_Type
;
78 Mode
: in FCB
.File_Mode
;
80 Form
: in String := "");
82 end System
.Sequential_IO
;