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- ------------------------------------------------------------------------------
- -- --
- -- GNAT RUNTIME COMPONENTS --
- -- --
- -- A D A . T E X T _ I O . W I D E _ T E X T _ I O --
- -- --
- -- S p e c --
- -- --
- -- $Revision: 1.3 $ --
- -- --
- -- This specification is adapted from the Ada Reference Manual for use with --
- -- GNAT. In accordance with the copyright of that document, you can freely --
- -- copy and modify this specification, provided that if you redistribute a --
- -- modified version, any changes that you have made are clearly indicated. --
- -- --
- ------------------------------------------------------------------------------
-
- -- In GNAT, package Wide_Text_IO is a private child of Ada.Text_IO. This
- -- allows Wide_Text_IO to share the declarations in the private part of
- -- Text_IO (as well as sharing its routines). The Ada.Wide_Text_IO unit
- -- in the standard library is simply a renaming of his private child.
-
- -- Note: the generic subpackages of Wide_Text_IO (Integer_IO, Float_IO,
- -- Fixed_IO, Modular_IO, Decimal_IO and Enumeration_IO) appear as private
- -- children in GNAT. These children are with'ed automatically if they are
- -- referenced, so this rearrangement is invisible to user programs, but has
- -- the advantage that only the needed parts of Wide_Text_IO are processed
- -- and loaded.
-
- with System.WCh_Con;
-
- private package Ada.Text_IO.Wide_Text_IO is
-
- type File_Type is limited private;
- type File_Mode is (In_File, Out_File, Append_File);
-
- type Count is new Ada.Text_IO.Count;
-
- subtype Positive_Count is Count range 1 .. Count'Last;
-
- Unbounded : constant Count := 0;
- -- Line and page length
-
- subtype Field is Ada.Text_IO.Field;
-
- 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, output and error 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 out File_Type);
- procedure Flush;
-
- --------------------------------------------
- -- Specification of line and page lengths --
- --------------------------------------------
-
- procedure Set_Line_Length (File : in File_Type; To : in Count);
- procedure Set_Line_Length (To : in Count);
-
- procedure Set_Page_Length (File : in File_Type; To : in Count);
- procedure Set_Page_Length (To : in Count);
-
- function Line_Length (File : in File_Type) return Count;
- function Line_Length return Count;
-
- function Page_Length (File : in File_Type) return Count;
- function Page_Length return Count;
-
- ------------------------------------
- -- Column, Line, and Page Control --
- ------------------------------------
-
- procedure New_Line (File : in File_Type; Spacing : in Positive_Count := 1);
- procedure New_Line (Spacing : in Positive_Count := 1);
-
- procedure Skip_Line (File : in File_Type; Spacing : in Positive_Count := 1);
- procedure Skip_Line (Spacing : in Positive_Count := 1);
-
- function End_Of_Line (File : in File_Type) return Boolean;
- function End_Of_Line return Boolean;
-
- procedure New_Page (File : in File_Type);
- procedure New_Page;
-
- procedure Skip_Page (File : in File_Type);
- procedure Skip_Page;
-
- function End_Of_Page (File : in File_Type) return Boolean;
- function End_Of_Page return Boolean;
-
- function End_Of_File (File : in File_Type) return Boolean;
- function End_Of_File return Boolean;
-
- procedure Set_Col (File : in File_Type; To : in Positive_Count);
- procedure Set_Col (To : in Positive_Count);
-
- procedure Set_Line (File : in File_Type; To : in Positive_Count);
- procedure Set_Line (To : in Positive_Count);
-
- function Col (File : in File_Type) return Positive_Count;
- function Col return Positive_Count;
-
- function Line (File : in File_Type) return Positive_Count;
- function Line return Positive_Count;
-
- function Page (File : in File_Type) return Positive_Count;
- function Page return Positive_Count;
-
- -----------------------------
- -- Characters Input-Output --
- -----------------------------
-
- procedure Get (File : in File_Type; Item : out Wide_Character);
- procedure Get (Item : out Wide_Character);
- procedure Put (File : in File_Type; Item : in Wide_Character);
- procedure Put (Item : in Wide_Character);
-
- procedure Look_Ahead
- (File : in File_Type;
- Item : out Wide_Character;
- End_Of_Line : out Boolean);
-
- procedure Look_Ahead
- (Item : out Wide_Character;
- End_Of_Line : out Boolean);
-
- procedure Get_Immediate
- (File : in File_Type;
- Item : out Wide_Character);
-
- procedure Get_Immediate
- (Item : out Wide_Character);
-
- procedure Get_Immediate
- (File : in File_Type;
- Item : out Wide_Character;
- Available : out Boolean);
-
- procedure Get_Immediate
- (Item : out Wide_Character;
- Available : out Boolean);
-
- --------------------------
- -- Strings Input-Output --
- --------------------------
-
- procedure Get (File : in File_Type; Item : out Wide_String);
- procedure Get (Item : out Wide_String);
- procedure Put (File : in File_Type; Item : in Wide_String);
- procedure Put (Item : in Wide_String);
-
- procedure Get_Line
- (File : in File_Type;
- Item : out Wide_String;
- Last : out Natural);
-
- procedure Get_Line
- (Item : out Wide_String;
- Last : out Natural);
-
- procedure Put_Line
- (File : in File_Type;
- Item : in Wide_String);
-
- procedure Put_Line
- (Item : in Wide_String);
-
- -- 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;
-
- private
- -------------------------------------
- -- Wide_Text_IO File Control Block --
- -------------------------------------
-
- package FCB renames System.File_Control_Block;
-
- Default_Wide_Encoding_Method :
- System.Wch_Con.WC_Encoding_Method := System.Wch_Con.WCEM_Hex;
-
- type Wide_Text_AFCB is new Ada.Text_IO.Text_AFCB with record
-
- WC_Method : System.WCh_Con.WC_Encoding_Method :=
- Default_Wide_Encoding_Method;
- -- Encoding method to be used for this file
-
- Saved_Wide_Character : Wide_Character range
- Wide_Character'Val (16#0080#) ..
- Wide_Character'Val (16#FFFF#);
- -- This field is valid only if Before_Wide_Character is set. It
- -- contains a wide character read by Look_Ahead. If Look_Ahead
- -- reads a character in the range 16#0000# to 16#007F#, then it
- -- can use ungetc to put it back, but ungetc cannot be called
- -- more than once, so for characters above this range, we don't
- -- try to back up the file. Instead we save the character in this
- -- field and set the flag Before_Wide_Character to indicate that
- -- we are logically positioned before this character even though
- -- the stream is physically positioned after it.
-
- end record;
-
- type File_Type is access all Wide_Text_AFCB;
-
- function AFCB_Allocate
- (Control_Block : Wide_Text_AFCB)
- return FCB.AFCB_Ptr;
-
- procedure AFCB_Close (File : access Wide_Text_AFCB);
- procedure AFCB_Free (File : access Wide_Text_AFCB);
-
- -- Note: The Read and Write operations are inherited from Text_IO
-
- -- The following representation clause allows the use of unchecked
- -- conversion for rapid translation between the File_Mode type
- -- used in this package and System.File_IO.
-
- for File_Mode use
- (In_File => 0, -- System.File_IO.File_Mode'Pos (In_File)
- Out_File => 2, -- System.File_IO.File_Mode'Pos (Out_File)
- Append_File => 3); -- System.File_IO.File_Mode'Pos (Append_File)
-
- ----------------------
- -- Utility Routines --
- ----------------------
-
- procedure Setup (File : File_Type);
- -- Setup fields of file control block following Open or Create. This is
- -- in the spec so it can be accessed from Ada.Wide_Text_IO.C_Streams.
- -- The special task required is to set the wide text encoding method
- -- from a possible specification in the form file.
-
- --------------------
- -- Standard Files --
- --------------------
-
- Standard_Err_AFCB : aliased Wide_Text_AFCB;
- Standard_In_AFCB : aliased Wide_Text_AFCB;
- Standard_Out_AFCB : aliased Wide_Text_AFCB;
-
- Standard_Err : aliased File_Type := Standard_Err_AFCB'Access;
- Standard_In : aliased File_Type := Standard_In_AFCB'Access;
- Standard_Out : aliased File_Type := Standard_Out_AFCB'Access;
- -- Standard files
-
- Current_In : aliased File_Type := Standard_In;
- Current_Out : aliased File_Type := Standard_Out;
- Current_Err : aliased File_Type := Standard_Err;
- -- Current files
-
- end Ada.Text_IO.Wide_Text_IO;
-