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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . W I D E _ W I D E _ T E X T _ I O . F I X E D _ I O --
-- --
-- B o d y --
-- --
-- Copyright (C) 2020, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Ada.Wide_Wide_Text_IO.Generic_Aux; use Ada.Wide_Wide_Text_IO.Generic_Aux;
with Ada.Wide_Wide_Text_IO.Float_Aux; use Ada.Wide_Wide_Text_IO.Float_Aux;
package body Ada.Wide_Wide_Text_IO.Fixed_Aux is
---------
-- Get --
---------
function Get
(File : File_Type;
Width : Field;
Num : Int;
Den : Int) return Int
is
Buf : String (1 .. Field'Last);
Ptr : aliased Integer;
Stop : Integer := 0;
Item : Int;
begin
if Width /= 0 then
Load_Width (File, Width, Buf, Stop);
String_Skip (Buf, Ptr);
else
Load_Real (File, Buf, Stop);
Ptr := 1;
end if;
Item := Scan (Buf, Ptr'Access, Stop, Num, Den);
Check_End_Of_Field (Buf, Stop, Ptr, Width);
return Item;
end Get;
----------
-- Gets --
----------
function Gets
(From : String;
Last : out Positive;
Num : Int;
Den : Int) return Int
is
Pos : aliased Integer;
Item : Int;
begin
String_Skip (From, Pos);
Item := Scan (From, Pos'Access, From'Last, Num, Den);
Last := Pos - 1;
return Item;
exception
when Constraint_Error =>
Last := Pos - 1;
raise Data_Error;
end Gets;
---------
-- Put --
---------
procedure Put
(File : File_Type;
Item : Int;
Fore : Field;
Aft : Field;
Exp : Natural;
Num : Int;
Den : Int;
For0 : Natural;
Aft0 : Natural)
is
Buf : String (1 .. Field'Last);
Ptr : Natural := 0;
begin
Set_Image (Item, Buf, Ptr, Num, Den, For0, Aft0, Fore, Aft, Exp);
Put_Item (File, Buf (1 .. Ptr));
end Put;
----------
-- Puts --
----------
procedure Puts
(To : out String;
Item : Int;
Aft : Field;
Exp : Natural;
Num : Int;
Den : Int;
For0 : Natural;
Aft0 : Natural)
is
Buf : String (1 .. Positive'Max (Field'Last, To'Length));
Fore : Integer;
Ptr : Natural := 0;
begin
-- Compute Fore, allowing for the decimal dot and Aft digits
Fore := To'Length - 1 - Field'Max (1, Aft);
-- Allow for Exp and one more for E if exponent present
if Exp /= 0 then
Fore := Fore - 1 - Field'Max (2, Exp);
end if;
-- Make sure we have enough room
if Fore < 1 + Boolean'Pos (Item < 0) then
raise Layout_Error;
end if;
-- Do the conversion and check length of result
Set_Image (Item, Buf, Ptr, Num, Den, For0, Aft0, Fore, Aft, Exp);
if Ptr > To'Length then
raise Layout_Error;
else
To := Buf (1 .. Ptr);
end if;
end Puts;
end Ada.Wide_Wide_Text_IO.Fixed_Aux;
|
