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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [ada/] [s-sequio.adb] - Blame information for rev 316

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1 281 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT RUN-TIME COMPONENTS                         --
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--                                                                          --
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--                 S Y S T E M . S E Q U E N T I A L _ I O                  --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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with System.File_IO;
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with Ada.Unchecked_Deallocation;
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package body System.Sequential_IO is
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   subtype AP is FCB.AFCB_Ptr;
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   package FIO renames System.File_IO;
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   -------------------
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   -- AFCB_Allocate --
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   -------------------
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   function AFCB_Allocate
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     (Control_Block : Sequential_AFCB) return FCB.AFCB_Ptr
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   is
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      pragma Warnings (Off, Control_Block);
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   begin
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      return new Sequential_AFCB;
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   end AFCB_Allocate;
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   ----------------
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   -- AFCB_Close --
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   ----------------
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   --  No special processing required for Sequential_IO close
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   procedure AFCB_Close (File : not null access Sequential_AFCB) is
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      pragma Warnings (Off, File);
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   begin
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      null;
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   end AFCB_Close;
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   ---------------
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   -- AFCB_Free --
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   ---------------
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   procedure AFCB_Free (File : not null access Sequential_AFCB) is
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      type FCB_Ptr is access all Sequential_AFCB;
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      FT : FCB_Ptr := FCB_Ptr (File);
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      procedure Free is new
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        Ada.Unchecked_Deallocation (Sequential_AFCB, FCB_Ptr);
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   begin
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      Free (FT);
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   end AFCB_Free;
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   ------------
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   -- Create --
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   ------------
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   procedure Create
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     (File : in out File_Type;
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      Mode : FCB.File_Mode := FCB.Out_File;
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      Name : String := "";
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      Form : String := "")
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   is
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      Dummy_File_Control_Block : Sequential_AFCB;
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      pragma Warnings (Off, Dummy_File_Control_Block);
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      --  Yes, we know this is never assigned a value, only the tag
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      --  is used for dispatching purposes, so that's expected.
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   begin
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      FIO.Open (File_Ptr  => AP (File),
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                Dummy_FCB => Dummy_File_Control_Block,
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                Mode      => Mode,
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                Name      => Name,
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                Form      => Form,
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                Amethod   => 'Q',
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                Creat     => True,
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                Text      => False);
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   end Create;
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   ----------
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   -- Open --
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   ----------
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   procedure Open
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     (File : in out File_Type;
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      Mode : FCB.File_Mode;
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      Name : String;
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      Form : String := "")
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   is
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      Dummy_File_Control_Block : Sequential_AFCB;
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      pragma Warnings (Off, Dummy_File_Control_Block);
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      --  Yes, we know this is never assigned a value, only the tag
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      --  is used for dispatching purposes, so that's expected.
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   begin
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      FIO.Open (File_Ptr  => AP (File),
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                Dummy_FCB => Dummy_File_Control_Block,
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                Mode      => Mode,
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                Name      => Name,
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                Form      => Form,
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                Amethod   => 'Q',
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                Creat     => False,
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                Text      => False);
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   end Open;
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   ----------
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   -- Read --
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   ----------
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   --  Not used, since Sequential_IO files are not used as streams
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   procedure Read
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     (File : in out Sequential_AFCB;
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      Item : out Ada.Streams.Stream_Element_Array;
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      Last : out Ada.Streams.Stream_Element_Offset)
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   is
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   begin
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      raise Program_Error;
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   end Read;
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   -----------
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   -- Write --
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   -----------
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   --  Not used, since Sequential_IO files are not used as streams
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   procedure Write
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     (File : in out Sequential_AFCB;
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      Item : Ada.Streams.Stream_Element_Array)
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   is
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   begin
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      raise Program_Error;
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   end Write;
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end System.Sequential_IO;

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