------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . W I D E _ T E X T _ I O . F L O A T _ I O --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2023, 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_Text_IO.Float_Aux;
with System.Img_Flt; use System.Img_Flt;
with System.Img_LFlt; use System.Img_LFlt;
with System.Img_LLF; use System.Img_LLF;
with System.Val_Flt; use System.Val_Flt;
with System.Val_LFlt; use System.Val_LFlt;
with System.Val_LLF; use System.Val_LLF;
with System.WCh_Con; use System.WCh_Con;
with System.WCh_WtS; use System.WCh_WtS;
package body Ada.Wide_Text_IO.Float_IO is
package Aux_Float is new
Ada.Wide_Text_IO.Float_Aux (Float, Scan_Float, Set_Image_Float);
package Aux_Long_Float is new
Ada.Wide_Text_IO.Float_Aux
(Long_Float, Scan_Long_Float, Set_Image_Long_Float);
package Aux_Long_Long_Float is new
Ada.Wide_Text_IO.Float_Aux
(Long_Long_Float, Scan_Long_Long_Float, Set_Image_Long_Long_Float);
-- Throughout this generic body, we distinguish between the case where type
-- Float is OK, where type Long_Float is OK and where type Long_Long_Float
-- is needed. These boolean constants are used to test for this, such that
-- only code for the relevant case is included in the instance.
OK_Float : constant Boolean := Num'Base'Digits <= Float'Digits;
OK_Long_Float : constant Boolean := Num'Base'Digits <= Long_Float'Digits;
---------
-- Get --
---------
procedure Get
(File : File_Type;
Item : out Num;
Width : Field := 0)
is
pragma Unsuppress (Range_Check);
begin
if OK_Float then
Aux_Float.Get (File, Float (Item), Width);
elsif OK_Long_Float then
Aux_Long_Float.Get (File, Long_Float (Item), Width);
else
Aux_Long_Long_Float.Get (File, Long_Long_Float (Item), Width);
end if;
-- In the case where the type is unconstrained (e.g. Standard'Float),
-- the above conversion may result in an infinite value, which is
-- normally fine for a conversion, but in this case, we want to treat
-- that as a data error.
if not Item'Valid then
raise Data_Error;
end if;
exception
when Constraint_Error => raise Data_Error;
end Get;
procedure Get
(Item : out Num;
Width : Field := 0)
is
begin
Get (Current_In, Item, Width);
end Get;
procedure Get
(From : Wide_String;
Item : out Num;
Last : out Positive)
is
pragma Unsuppress (Range_Check);
S : constant String := Wide_String_To_String (From, WCEM_Upper);
-- String on which we do the actual conversion. Note that the method
-- used for wide character encoding is irrelevant, since if there is
-- a character outside the Standard.Character range then the call to
-- Aux.Gets will raise Data_Error in any case.
begin
if OK_Float then
Aux_Float.Gets (S, Float (Item), Last);
elsif OK_Long_Float then
Aux_Long_Float.Gets (S, Long_Float (Item), Last);
else
Aux_Long_Long_Float.Gets (S, Long_Long_Float (Item), Last);
end if;
-- In the case where the type is unconstrained (e.g. Standard'Float),
-- the above conversion may result in an infinite value, which is
-- normally fine for a conversion, but in this case, we want to treat
-- that as a data error.
if not Item'Valid then
raise Data_Error;
end if;
exception
when Constraint_Error => raise Data_Error;
end Get;
---------
-- Put --
---------
procedure Put
(File : File_Type;
Item : Num;
Fore : Field := Default_Fore;
Aft : Field := Default_Aft;
Exp : Field := Default_Exp)
is
begin
if OK_Float then
Aux_Float.Put (File, Float (Item), Fore, Aft, Exp);
elsif OK_Long_Float then
Aux_Long_Float.Put (File, Long_Float (Item), Fore, Aft, Exp);
else
Aux_Long_Long_Float.Put
(File, Long_Long_Float (Item), Fore, Aft, Exp);
end if;
end Put;
procedure Put
(Item : Num;
Fore : Field := Default_Fore;
Aft : Field := Default_Aft;
Exp : Field := Default_Exp)
is
begin
Put (Current_Out, Item, Fore, Aft, Exp);
end Put;
procedure Put
(To : out Wide_String;
Item : Num;
Aft : Field := Default_Aft;
Exp : Field := Default_Exp)
is
S : String (To'First .. To'Last);
begin
if OK_Float then
Aux_Float.Puts (S, Float (Item), Aft, Exp);
elsif OK_Long_Float then
Aux_Long_Float.Puts (S, Long_Float (Item), Aft, Exp);
else
Aux_Long_Long_Float.Puts (S, Long_Long_Float (Item), Aft, Exp);
end if;
for J in S'Range loop
To (J) := Wide_Character'Val (Character'Pos (S (J)));
end loop;
end Put;
end Ada.Wide_Text_IO.Float_IO;