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) 1992-2009, 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 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. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
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/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
33 with Ada.Unchecked_Deallocation;
35 package body System.Sequential_IO is
37 subtype AP is FCB.AFCB_Ptr;
39 package FIO renames System.File_IO;
45 function AFCB_Allocate
46 (Control_Block : Sequential_AFCB) return FCB.AFCB_Ptr
48 pragma Warnings (Off, Control_Block);
51 return new Sequential_AFCB;
58 -- No special processing required for Sequential_IO close
60 procedure AFCB_Close (File : not null access Sequential_AFCB) is
61 pragma Warnings (Off, File);
71 procedure AFCB_Free (File : not null access Sequential_AFCB) is
73 type FCB_Ptr is access all Sequential_AFCB;
75 FT : FCB_Ptr := FCB_Ptr (File);
78 Ada.Unchecked_Deallocation (Sequential_AFCB, FCB_Ptr);
89 (File : in out File_Type;
90 Mode : FCB.File_Mode := FCB.Out_File;
94 Dummy_File_Control_Block : Sequential_AFCB;
95 pragma Warnings (Off, Dummy_File_Control_Block);
96 -- Yes, we know this is never assigned a value, only the tag
97 -- is used for dispatching purposes, so that's expected.
100 FIO.Open (File_Ptr => AP (File),
101 Dummy_FCB => Dummy_File_Control_Block,
115 (File : in out File_Type;
116 Mode : FCB.File_Mode;
120 Dummy_File_Control_Block : Sequential_AFCB;
121 pragma Warnings (Off, Dummy_File_Control_Block);
122 -- Yes, we know this is never assigned a value, only the tag
123 -- is used for dispatching purposes, so that's expected.
126 FIO.Open (File_Ptr => AP (File),
127 Dummy_FCB => Dummy_File_Control_Block,
140 -- Not used, since Sequential_IO files are not used as streams
143 (File : in out Sequential_AFCB;
144 Item : out Ada.Streams.Stream_Element_Array;
145 Last : out Ada.Streams.Stream_Element_Offset)
155 -- Not used, since Sequential_IO files are not used as streams
158 (File : in out Sequential_AFCB;
159 Item : Ada.Streams.Stream_Element_Array)
165 end System.Sequential_IO;