236 lines
6.7 KiB
Ada
236 lines
6.7 KiB
Ada
------------------------------------------------------------------------------
|
|
-- --
|
|
-- GNAT RUN-TIME COMPONENTS --
|
|
-- --
|
|
-- A D A . W I D E _ W I D E _ T E X T _ I O . F L O A T _ A U X --
|
|
-- --
|
|
-- B o d y --
|
|
-- --
|
|
-- Copyright (C) 1992-2014, 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 System.Img_Real; use System.Img_Real;
|
|
with System.Val_Real; use System.Val_Real;
|
|
|
|
package body Ada.Wide_Wide_Text_IO.Float_Aux is
|
|
|
|
---------
|
|
-- Get --
|
|
---------
|
|
|
|
procedure Get
|
|
(File : File_Type;
|
|
Item : out Long_Long_Float;
|
|
Width : Field)
|
|
is
|
|
Buf : String (1 .. Field'Last);
|
|
Stop : Integer := 0;
|
|
Ptr : aliased Integer := 1;
|
|
|
|
begin
|
|
if Width /= 0 then
|
|
Load_Width (File, Width, Buf, Stop);
|
|
String_Skip (Buf, Ptr);
|
|
else
|
|
Load_Real (File, Buf, Stop);
|
|
end if;
|
|
|
|
Item := Scan_Real (Buf, Ptr'Access, Stop);
|
|
|
|
Check_End_Of_Field (Buf, Stop, Ptr, Width);
|
|
end Get;
|
|
|
|
----------
|
|
-- Gets --
|
|
----------
|
|
|
|
procedure Gets
|
|
(From : String;
|
|
Item : out Long_Long_Float;
|
|
Last : out Positive)
|
|
is
|
|
Pos : aliased Integer;
|
|
|
|
begin
|
|
String_Skip (From, Pos);
|
|
Item := Scan_Real (From, Pos'Access, From'Last);
|
|
Last := Pos - 1;
|
|
|
|
exception
|
|
when Constraint_Error =>
|
|
raise Data_Error;
|
|
end Gets;
|
|
|
|
---------------
|
|
-- Load_Real --
|
|
---------------
|
|
|
|
procedure Load_Real
|
|
(File : File_Type;
|
|
Buf : out String;
|
|
Ptr : in out Natural)
|
|
is
|
|
Loaded : Boolean;
|
|
|
|
begin
|
|
-- Skip initial blanks and load possible sign
|
|
|
|
Load_Skip (File);
|
|
Load (File, Buf, Ptr, '+', '-');
|
|
|
|
-- Case of .nnnn
|
|
|
|
Load (File, Buf, Ptr, '.', Loaded);
|
|
|
|
if Loaded then
|
|
Load_Digits (File, Buf, Ptr, Loaded);
|
|
|
|
-- Hopeless junk if no digits loaded
|
|
|
|
if not Loaded then
|
|
return;
|
|
end if;
|
|
|
|
-- Otherwise must have digits to start
|
|
|
|
else
|
|
Load_Digits (File, Buf, Ptr, Loaded);
|
|
|
|
-- Hopeless junk if no digits loaded
|
|
|
|
if not Loaded then
|
|
return;
|
|
end if;
|
|
|
|
-- Deal with based case. We recognize either the standard '#' or the
|
|
-- allowed alternative replacement ':' (see RM J.2(3)).
|
|
|
|
Load (File, Buf, Ptr, '#', ':', Loaded);
|
|
|
|
if Loaded then
|
|
|
|
-- Case of nnn#.xxx#
|
|
|
|
Load (File, Buf, Ptr, '.', Loaded);
|
|
|
|
if Loaded then
|
|
Load_Extended_Digits (File, Buf, Ptr);
|
|
Load (File, Buf, Ptr, '#', ':');
|
|
|
|
-- Case of nnn#xxx.[xxx]# or nnn#xxx#
|
|
|
|
else
|
|
Load_Extended_Digits (File, Buf, Ptr);
|
|
Load (File, Buf, Ptr, '.', Loaded);
|
|
|
|
if Loaded then
|
|
Load_Extended_Digits (File, Buf, Ptr);
|
|
end if;
|
|
|
|
-- As usual, it seems strange to allow mixed base characters,
|
|
-- but that is what ACVC tests expect, see CE3804M, case (3).
|
|
|
|
Load (File, Buf, Ptr, '#', ':');
|
|
end if;
|
|
|
|
-- Case of nnn.[nnn] or nnn
|
|
|
|
else
|
|
-- Prevent the potential processing of '.' in cases where the
|
|
-- initial digits have a trailing underscore.
|
|
|
|
if Buf (Ptr) = '_' then
|
|
return;
|
|
end if;
|
|
|
|
Load (File, Buf, Ptr, '.', Loaded);
|
|
|
|
if Loaded then
|
|
Load_Digits (File, Buf, Ptr);
|
|
end if;
|
|
end if;
|
|
end if;
|
|
|
|
-- Deal with exponent
|
|
|
|
Load (File, Buf, Ptr, 'E', 'e', Loaded);
|
|
|
|
if Loaded then
|
|
Load (File, Buf, Ptr, '+', '-');
|
|
Load_Digits (File, Buf, Ptr);
|
|
end if;
|
|
end Load_Real;
|
|
|
|
---------
|
|
-- Put --
|
|
---------
|
|
|
|
procedure Put
|
|
(File : File_Type;
|
|
Item : Long_Long_Float;
|
|
Fore : Field;
|
|
Aft : Field;
|
|
Exp : Field)
|
|
is
|
|
Buf : String (1 .. Field'Last);
|
|
Ptr : Natural := 0;
|
|
|
|
begin
|
|
Set_Image_Real (Item, Buf, Ptr, Fore, Aft, Exp);
|
|
Put_Item (File, Buf (1 .. Ptr));
|
|
end Put;
|
|
|
|
----------
|
|
-- Puts --
|
|
----------
|
|
|
|
procedure Puts
|
|
(To : out String;
|
|
Item : Long_Long_Float;
|
|
Aft : Field;
|
|
Exp : Field)
|
|
is
|
|
Buf : String (1 .. Field'Last);
|
|
Ptr : Natural := 0;
|
|
|
|
begin
|
|
Set_Image_Real (Item, Buf, Ptr, Fore => 1, Aft => Aft, Exp => Exp);
|
|
|
|
if Ptr > To'Length then
|
|
raise Layout_Error;
|
|
|
|
else
|
|
for J in 1 .. Ptr loop
|
|
To (To'Last - Ptr + J) := Buf (J);
|
|
end loop;
|
|
|
|
for J in To'First .. To'Last - Ptr loop
|
|
To (J) := ' ';
|
|
end loop;
|
|
end if;
|
|
end Puts;
|
|
|
|
end Ada.Wide_Wide_Text_IO.Float_Aux;
|