A.10.1 The Package Text_IO

with Ada.IO_Exceptions;
package Ada.Text_IO
with Global => in out synchronized is

type File_Type is limited private;

type File_Mode is (In_File, Out_File, Append_File);

type Count is range 0 .. implementation-defined;
subtype Positive_Count is Count range 1 .. Count'Last;
Unbounded : constant Count := 0; -- line and page length

subtype Field is Integer range 0 .. implementation-defined;
subtype Number_Base is Integer range 2 .. 16;

type Type_Set is (Lower_Case, Upper_Case);

-- File Management

procedure Create (File : in out File_Type;
Mode : in File_Mode := Out_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;

-- Control of default input and output files

procedure Set_Input (File : in File_Type);
procedure Set_Output(File : in File_Type);
procedure Set_Error (File : in File_Type);

function Standard_Input return File_Type;
function Standard_Output return File_Type;
function Standard_Error return File_Type;

function Current_Input return File_Type;
function Current_Output return File_Type;
function Current_Error return File_Type;

type File_Access is access constant File_Type;

function Standard_Input return File_Access;
function Standard_Output return File_Access;
function Standard_Error return File_Access;

function Current_Input return File_Access;
function Current_Output return File_Access;
function Current_Error return File_Access;

--Buffer control
procedure Flush (File : in File_Type)
with Global => overriding in out File;
procedure Flush
with Global => in out all;

-- Specification of line and page lengths

procedure Set_Line_Length(File : in File_Type; To : in Count)
with Global => overriding in out File;
procedure Set_Line_Length(To : in Count)
with Global => in out all;

procedure Set_Page_Length(File : in File_Type; To : in Count)
with Global => overriding in out File;
procedure Set_Page_Length(To : in Count)
with Global => in out all;

function Line_Length(File : in File_Type) return Count;
function Line_Length return Count
with Global => in all;

function Page_Length(File : in File_Type) return Count;
function Page_Length return Count
with Global => in all;

-- Column, Line, and Page Control

procedure New_Line (File : in File_Type;
Spacing : in Positive_Count := 1)
with Global => overriding in out File;
procedure New_Line (Spacing : in Positive_Count := 1)
with Global => in out all;

procedure Skip_Line (File : in File_Type;
Spacing : in Positive_Count := 1)
with Global => overriding in out File;
procedure Skip_Line (Spacing : in Positive_Count := 1)
with Global => in out all;

function End_Of_Line(File : in File_Type) return Boolean;
function End_Of_Line return Boolean;

procedure New_Page (File : in File_Type)
with Global => overriding in out File;
procedure New_Page
with Global => in out all;

procedure Skip_Page (File : in File_Type)
with Global => overriding in out File;
procedure Skip_Page
with Global => in out all;

function End_Of_Page(File : in File_Type) return Boolean;
function End_Of_Page return Boolean
with Global => in all;

function End_Of_File(File : in File_Type) return Boolean;
function End_Of_File return Boolean
with Global => in all;

procedure Set_Col (File : in File_Type; To : in Positive_Count)
with Global => overriding in out File;
procedure Set_Col (To : in Positive_Count)
with Global => in out all;

procedure Set_Line(File : in File_Type; To : in Positive_Count)
with Global => overriding in out File;
procedure Set_Line(To : in Positive_Count)
with Global => in out all;

function Col (File : in File_Type) return Positive_Count;
function Col return Positive_Count
with Global => in all;

function Line(File : in File_Type) return Positive_Count;
function Line return Positive_Count
with Global => in all;

function Page(File : in File_Type) return Positive_Count;
function Page return Positive_Count
with Global => in all;

-- Character Input-Output

procedure Get(File : in File_Type; Item : out Character)
with Global => overriding in out File;
procedure Get(Item : out Character)
with Global => in out all;

procedure Put(File : in File_Type; Item : in Character)
with Global => overriding in out File;
procedure Put(Item : in Character)
with Global => in out all;

procedure Look_Ahead (File : in File_Type;
Item : out Character;
End_Of_Line : out Boolean)
with Global => overriding in out File;
procedure Look_Ahead (Item : out Character;
End_Of_Line : out Boolean)
with Global => in out all;

procedure Get_Immediate(File : in File_Type;
Item : out Character)
with Global => overriding in out File;
procedure Get_Immediate(Item : out Character)
with Global => in out all;

procedure Get_Immediate(File : in File_Type;
Item : out Character;
Available : out Boolean)
with Global => overriding in out File;
procedure Get_Immediate(Item : out Character;
Available : out Boolean)
with Global => in out all;

-- String Input-Output

procedure Get(File : in File_Type; Item : out String)
with Global => overriding in out File;
procedure Get(Item : out String)
with Global => in out all;

procedure Put(File : in File_Type; Item : in String)
with Global => overriding in out File;
procedure Put(Item : in String)
with Global => in out all;

procedure Get_Line(File : in File_Type;
Item : out String;
Last : out Natural)
with Global => overriding in out File;
procedure Get_Line(Item : out String; Last : out Natural)
with Global => in out all;

function Get_Line(File : in File_Type) return String
with Global => overriding in out File;
function Get_Line return String
with Global => in out all;

procedure Put_Line(File : in File_Type; Item : in String)
with Global => overriding in out File;
procedure Put_Line(Item : in String)
with Global => in out all;

-- Generic packages for Input-Output of Integer Types

generic
type Num is range <>;
package Integer_IO is

Default_Width : Field := Num'Width;
Default_Base : Number_Base := 10;

procedure Get(File : in File_Type;
Item : out Num;
Width : in Field := 0)
with Global => overriding in out File;
procedure Get(Item : out Num;
Width : in Field := 0)
with Global => in out all;

procedure Put(File : in File_Type;
Item : in Num;
Width : in Field := Default_Width;
Base : in Number_Base := Default_Base)
with Global => overriding in out File;
procedure Put(Item : in Num;
Width : in Field := Default_Width;
Base : in Number_Base := Default_Base)
with Global => in out all;
procedure Get(From : in String;
Item : out Num;
Last : out Positive)
with Nonblocking;
procedure Put(To : out String;
Item : in Num;
Base : in Number_Base := Default_Base)
with Nonblocking;

end Integer_IO;

generic
type Num is mod <>;
package Modular_IO is

Default_Width : Field := Num'Width;
Default_Base : Number_Base := 10;

procedure Get(File : in File_Type;
Item : out Num;
Width : in Field := 0)
with Global => overriding in out File;
procedure Get(Item : out Num;
Width : in Field := 0)
with Global => in out all;

procedure Put(File : in File_Type;
Item : in Num;
Width : in Field := Default_Width;
Base : in Number_Base := Default_Base)
with Global => overriding in out File;
procedure Put(Item : in Num;
Width : in Field := Default_Width;
Base : in Number_Base := Default_Base)
with Global => in out all;
procedure Get(From : in String;
Item : out Num;
Last : out Positive)
with Nonblocking;
procedure Put(To : out String;
Item : in Num;
Base : in Number_Base := Default_Base)
with Nonblocking;

end Modular_IO;

-- Generic packages for Input-Output of Real Types

generic
type Num is digits <>;
package Float_IO is

Default_Fore : Field := 2;
Default_Aft : Field := Num'Digits-1;
Default_Exp : Field := 3;

procedure Get(File : in File_Type;
Item : out Num;
Width : in Field := 0)
with Global => overriding in out File;
procedure Get(Item : out Num;
Width : in Field := 0)
with Global => in out all;

procedure Put(File : in File_Type;
Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp)
with Global => overriding in out File;
procedure Put(Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp)
with Global => in out all;

procedure Get(From : in String;
Item : out Num;
Last : out Positive)
with Nonblocking;
procedure Put(To : out String;
Item : in Num;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp)
with Nonblocking;
end Float_IO;

generic
type Num is delta <>;
package Fixed_IO is

Default_Fore : Field := Num'Fore;
Default_Aft : Field := Num'Aft;
Default_Exp : Field := 0;

procedure Get(File : in File_Type;
Item : out Num;
Width : in Field := 0)
with Global => overriding in out File;
procedure Get(Item : out Num;
Width : in Field := 0)
with Global => in out all;

procedure Put(File : in File_Type;
Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp)
with Global => overriding in out File;
procedure Put(Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp)
with Global => in out all;

procedure Get(From : in String;
Item : out Num;
Last : out Positive)
with Nonblocking;
procedure Put(To : out String;
Item : in Num;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp)
with Nonblocking;
end Fixed_IO;

generic
type Num is delta <> digits <>;
package Decimal_IO is

Default_Fore : Field := Num'Fore;
Default_Aft : Field := Num'Aft;
Default_Exp : Field := 0;

procedure Get(File : in File_Type;
Item : out Num;
Width : in Field := 0)
with Global => overriding in out File;
procedure Get(Item : out Num;
Width : in Field := 0)
with Global => in out all;

procedure Put(File : in File_Type;
Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp)
with Global => overriding in out File;
procedure Put(Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp)
with Global => in out all;

procedure Get(From : in String;
Item : out Num;
Last : out Positive)
with Nonblocking;
procedure Put(To : out String;
Item : in Num;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp)
with Nonblocking;
end Decimal_IO;

-- Generic package for Input-Output of Enumeration Types

generic
type Enum is (<>);
package Enumeration_IO is

Default_Width : Field := 0;
Default_Setting : Type_Set := Upper_Case;

procedure Get(File : in File_Type;
Item : out Enum)
with Global => overriding in out File;
procedure Get(Item : out Enum)
with Global => in out all;

procedure Put(File : in File_Type;
Item : in Enum;
Width : in Field := Default_Width;
Set : in Type_Set := Default_Setting)
with Global => overriding in out File;
procedure Put(Item : in Enum;
Width : in Field := Default_Width;
Set : in Type_Set := Default_Setting)
with Global => in out all;

procedure Get(From : in String;
Item : out Enum;
Last : out Positive)
with Nonblocking;
procedure Put(To : out String;
Item : in Enum;
Set : in Type_Set := Default_Setting)
with Nonblocking;
end Enumeration_IO;

-- 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;
Layout_Error : exception renames IO_Exceptions.Layout_Error;

package Wide_File_Names is

-- File management

procedure Create (File : in out File_Type;
Mode : in File_Mode := Out_File;
Name : in Wide_String := "";
Form : in Wide_String := "");

procedure Open (File : in out File_Type;
Mode : in File_Mode;
Name : in Wide_String;
Form : in Wide_String := "");

function Name (File : in File_Type) return Wide_String;

function Form (File : in File_Type) return Wide_String;

end Wide_File_Names;

package Wide_Wide_File_Names is

-- File management

procedure Create (File : in out File_Type;
Mode : in File_Mode := Out_File;
Name : in Wide_Wide_String := "";
Form : in Wide_Wide_String := "");

procedure Open (File : in out File_Type;
Mode : in File_Mode;
Name : in Wide_Wide_String;
Form : in Wide_Wide_String := "");

function Name (File : in File_Type) return Wide_Wide_String;

function Form (File : in File_Type) return Wide_Wide_String;

end Wide_Wide_File_Names;

private
... -- not specified by the language
end Ada.Text_IO;