A.8.4 The Generic Package Direct_IO
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Static Semantics
The generic library package Direct_IO has the following declaration:
with Ada.IO_Exceptions;
generic
type Element_Type is private;
package Ada.Direct_IO is
type File_Type is limited private;
type File_Mode is (In_File, Inout_File, Out_File);
type Count is range 0 .. implementation-defined;
subtype Positive_Count is Count range 1 .. Count'Last;
-- File management
procedure Create(File : in out File_Type;
Mode : in File_Mode := Inout_File;
Name : in String := "";
Form : in String := "");
procedure Open (File : in out File_Type;
Mode : in File_Mode;
Name : in String;
Form : in String := "");
procedure Close (File : in out File_Type);
procedure Delete(File : in out File_Type);
procedure Reset (File : in out File_Type; Mode : in File_Mode);
procedure Reset (File : in out File_Type);
function Mode (File : in File_Type) return File_Mode;
function Name (File : in File_Type) return String;
function Form (File : in File_Type) return String;
function Is_Open(File : in File_Type) return Boolean;
-- Input and output operations
procedure Read (File : in File_Type; Item : out Element_Type;
From : in Positive_Count);
procedure Read (File : in File_Type; Item : out Element_Type);
procedure Write(File : in File_Type; Item : in Element_Type;
To : in Positive_Count);
procedure Write(File : in File_Type; Item : in Element_Type);
procedure Set_Index(File : in File_Type; To : in Positive_Count);
function Index(File : in File_Type) return Positive_Count;
function Size (File : in File_Type) return Count;
function End_Of_File(File : in File_Type) return Boolean;
-- Exceptions
Status_Error : exception renames IO_Exceptions.Status_Error;
Mode_Error : exception renames IO_Exceptions.Mode_Error;
Name_Error : exception renames IO_Exceptions.Name_Error;
Use_Error : exception renames IO_Exceptions.Use_Error;
Device_Error : exception renames IO_Exceptions.Device_Error;
End_Error : exception renames IO_Exceptions.End_Error;
Data_Error : exception renames IO_Exceptions.Data_Error;
private
... -- not specified by the language
end Ada.Direct_IO;
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Copyright © 2000 The MITRE Corporation, Inc.
Ada Reference Manual