1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- S Y S T E M . S E Q U E N T I A L _ I O --
9 -- Copyright (C) 1992-2007, 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 ------------------------------------------------------------------------------
35 with Ada.Unchecked_Deallocation;
37 package body System.Sequential_IO is
39 subtype AP is FCB.AFCB_Ptr;
41 package FIO renames System.File_IO;
47 function AFCB_Allocate
48 (Control_Block : Sequential_AFCB) return FCB.AFCB_Ptr
50 pragma Warnings (Off, Control_Block);
53 return new Sequential_AFCB;
60 -- No special processing required for Sequential_IO close
62 procedure AFCB_Close (File : not null access Sequential_AFCB) is
63 pragma Warnings (Off, File);
73 procedure AFCB_Free (File : not null access Sequential_AFCB) is
75 type FCB_Ptr is access all Sequential_AFCB;
77 FT : FCB_Ptr := FCB_Ptr (File);
80 Ada.Unchecked_Deallocation (Sequential_AFCB, FCB_Ptr);
91 (File : in out File_Type;
92 Mode : FCB.File_Mode := FCB.Out_File;
96 Dummy_File_Control_Block : Sequential_AFCB;
97 pragma Warnings (Off, Dummy_File_Control_Block);
98 -- Yes, we know this is never assigned a value, only the tag
99 -- is used for dispatching purposes, so that's expected.
102 FIO.Open (File_Ptr => AP (File),
103 Dummy_FCB => Dummy_File_Control_Block,
117 (File : in out File_Type;
118 Mode : FCB.File_Mode;
122 Dummy_File_Control_Block : Sequential_AFCB;
123 pragma Warnings (Off, Dummy_File_Control_Block);
124 -- Yes, we know this is never assigned a value, only the tag
125 -- is used for dispatching purposes, so that's expected.
128 FIO.Open (File_Ptr => AP (File),
129 Dummy_FCB => Dummy_File_Control_Block,
142 -- Not used, since Sequential_IO files are not used as streams
145 (File : in out Sequential_AFCB;
146 Item : out Ada.Streams.Stream_Element_Array;
147 Last : out Ada.Streams.Stream_Element_Offset)
157 -- Not used, since Sequential_IO files are not used as streams
160 (File : in out Sequential_AFCB;
161 Item : Ada.Streams.Stream_Element_Array)
167 end System.Sequential_IO;