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- ------------------------------------------------------------------------------
- -- --
- -- GNAT RUNTIME COMPONENTS --
- -- --
- -- A D A . D I R E C T _ I O --
- -- --
- -- B o d y --
- -- --
- -- $Revision: 1.13 $ --
- -- --
- -- Copyright (c) 1992,1993,1994,1995 NYU, All Rights Reserved --
- -- --
- -- The GNAT library is free software; you can redistribute it and/or modify --
- -- it under terms of the GNU Library General Public License as published by --
- -- the Free Software Foundation; either version 2, or (at your option) any --
- -- later version. The GNAT library is distributed in the hope that it will --
- -- be useful, but WITHOUT ANY WARRANTY; without even the implied warranty --
- -- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
- -- Library General Public License for more details. You should have --
- -- received a copy of the GNU Library General Public License along with --
- -- the GNAT library; see the file COPYING.LIB. If not, write to the Free --
- -- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. --
- -- --
- ------------------------------------------------------------------------------
-
- -- This is the generic template for Direct_IO, i.e. the code that gets
- -- duplicated. We absolutely minimize this code by either calling routines
- -- in System.File_IO (for common file functions), or in System.Direct_IO
- -- (for specialized Direct_IO functions)
-
- with Interfaces.C_Streams; use Interfaces.C_Streams;
- with System; use System;
- with System.File_Control_Block;
- with System.File_IO;
- with Unchecked_Conversion;
-
- use type System.Direct_IO.Count;
-
- package body Ada.Direct_IO is
-
- package FCB renames System.File_Control_Block;
- package FIO renames System.File_IO;
- package DIO renames System.Direct_IO;
-
- subtype AP is FCB.AFCB_Ptr;
- subtype FP is DIO.File_Type;
- subtype DCount is DIO.Count;
- subtype DPCount is DIO.Positive_Count;
-
- function To_FCB is new Unchecked_Conversion (File_Mode, FCB.File_Mode);
- function To_DIO is new Unchecked_Conversion (FCB.File_Mode, File_Mode);
-
- -----------
- -- Close --
- -----------
-
- procedure Close (File : in out File_Type) is
- begin
- FIO.Close (AP (File));
- end Close;
-
- ------------
- -- Create --
- ------------
-
- procedure Create
- (File : in out File_Type;
- Mode : in File_Mode := Inout_File;
- Name : in String := "";
- Form : in String := "")
- is
- begin
- DIO.Create (FP (File), To_FCB (Mode), Name, Form);
- File.Bytes := Bytes;
- end Create;
-
- ------------
- -- Delete --
- ------------
-
- procedure Delete (File : in out File_Type) is
- begin
- FIO.Delete (AP (File));
- end Delete;
-
- -----------------
- -- End_Of_File --
- -----------------
-
- function End_Of_File (File : in File_Type) return Boolean is
- begin
- return DIO.End_Of_File (FP (File));
- end End_Of_File;
-
- ----------
- -- Form --
- ----------
-
- function Form (File : in File_Type) return String is
- begin
- return FIO.Form (AP (File));
- end Form;
-
- -----------
- -- Index --
- -----------
-
- function Index (File : in File_Type) return Positive_Count is
- begin
- return Positive_Count (DIO.Index (FP (File)));
- end Index;
-
- -------------
- -- Is_Open --
- -------------
-
- function Is_Open (File : in File_Type) return Boolean is
- begin
- return FIO.Is_Open (AP (File));
- end Is_Open;
-
- ----------
- -- Mode --
- ----------
-
- function Mode (File : in File_Type) return File_Mode is
- begin
- return To_DIO (FIO.Mode (AP (File)));
- end Mode;
-
- ----------
- -- Name --
- ----------
-
- function Name (File : in File_Type) return String is
- begin
- return FIO.Name (AP (File));
- end Name;
-
- ----------
- -- Open --
- ----------
-
- procedure Open
- (File : in out File_Type;
- Mode : in File_Mode;
- Name : in String;
- Form : in String := "")
- is
- begin
- DIO.Open (FP (File), To_FCB (Mode), Name, Form);
- File.Bytes := Bytes;
- end Open;
-
- ----------
- -- Read --
- ----------
-
- procedure Read
- (File : in File_Type;
- Item : out Element_Type;
- From : in Positive_Count)
- is
- begin
- DIO.Read (FP (File), Item'Address, DPCount (From));
- end Read;
-
- procedure Read (File : in File_Type; Item : out Element_Type) is
- begin
- DIO.Read (FP (File), Item'Address);
- end Read;
-
- -----------
- -- Reset --
- -----------
-
- procedure Reset (File : in out File_Type; Mode : in File_Mode) is
- begin
- DIO.Reset (FP (File), To_FCB (Mode));
- end Reset;
-
- procedure Reset (File : in out File_Type) is
- begin
- DIO.Reset (FP (File));
- end Reset;
-
- ---------------
- -- Set_Index --
- ---------------
-
- procedure Set_Index (File : in File_Type; To : in Positive_Count) is
- begin
- DIO.Set_Index (FP (File), DPCount (To));
- end Set_Index;
-
- ----------
- -- Size --
- ----------
-
- function Size (File : in File_Type) return Count is
- begin
- return Count (DIO.Size (FP (File)));
- end Size;
-
- -----------
- -- Write --
- -----------
-
- procedure Write
- (File : in File_Type;
- Item : in Element_Type;
- To : in Positive_Count)
- is
- begin
- DIO.Write (FP (File), Item'Address, DPCount (To));
- end Write;
-
- procedure Write (File : in File_Type; Item : in Element_Type) is
- begin
- DIO.Write (FP (File), Item'Address);
- end Write;
-
- end Ada.Direct_IO;
-