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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . T E X T _ I O . D E C I M A L _ A U X --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2018, 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.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
with Ada.Text_IO.Float_Aux; use Ada.Text_IO.Float_Aux;
with System.Img_Dec; use System.Img_Dec;
with System.Img_LLD; use System.Img_LLD;
with System.Val_Dec; use System.Val_Dec;
with System.Val_LLD; use System.Val_LLD;
package body Ada.Text_IO.Decimal_Aux is
-------------
-- Get_Dec --
-------------
function Get_Dec
(File : File_Type;
Width : Field;
Scale : Integer) return Integer
is
Buf : String (1 .. Field'Last);
Ptr : aliased Integer;
Stop : Integer := 0;
Item : Integer;
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_Decimal (Buf, Ptr'Access, Stop, Scale);
Check_End_Of_Field (Buf, Stop, Ptr, Width);
return Item;
end Get_Dec;
-------------
-- Get_LLD --
-------------
function Get_LLD
(File : File_Type;
Width : Field;
Scale : Integer) return Long_Long_Integer
is
Buf : String (1 .. Field'Last);
Ptr : aliased Integer;
Stop : Integer := 0;
Item : Long_Long_Integer;
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_Long_Long_Decimal (Buf, Ptr'Access, Stop, Scale);
Check_End_Of_Field (Buf, Stop, Ptr, Width);
return Item;
end Get_LLD;
--------------
-- Gets_Dec --
--------------
function Gets_Dec
(From : String;
Last : not null access Positive;
Scale : Integer) return Integer
is
Pos : aliased Integer;
Item : Integer;
begin
String_Skip (From, Pos);
Item := Scan_Decimal (From, Pos'Access, From'Last, Scale);
Last.all := Pos - 1;
return Item;
exception
when Constraint_Error =>
Last.all := Pos - 1;
raise Data_Error;
end Gets_Dec;
--------------
-- Gets_LLD --
--------------
function Gets_LLD
(From : String;
Last : not null access Positive;
Scale : Integer) return Long_Long_Integer
is
Pos : aliased Integer;
Item : Long_Long_Integer;
begin
String_Skip (From, Pos);
Item := Scan_Long_Long_Decimal (From, Pos'Access, From'Last, Scale);
Last.all := Pos - 1;
return Item;
exception
when Constraint_Error =>
Last.all := Pos - 1;
raise Data_Error;
end Gets_LLD;
-------------
-- Put_Dec --
-------------
procedure Put_Dec
(File : File_Type;
Item : Integer;
Fore : Field;
Aft : Field;
Exp : Field;
Scale : Integer)
is
Buf : String (1 .. Field'Last);
Ptr : Natural := 0;
begin
Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
Put_Item (File, Buf (1 .. Ptr));
end Put_Dec;
-------------
-- Put_LLD --
-------------
procedure Put_LLD
(File : File_Type;
Item : Long_Long_Integer;
Fore : Field;
Aft : Field;
Exp : Field;
Scale : Integer)
is
Buf : String (1 .. Field'Last);
Ptr : Natural := 0;
begin
Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
Put_Item (File, Buf (1 .. Ptr));
end Put_LLD;
--------------
-- Puts_Dec --
--------------
procedure Puts_Dec
(To : out String;
Item : Integer;
Aft : Field;
Exp : Field;
Scale : Integer)
is
Buf : String (1 .. Field'Last);
Fore : Integer;
Ptr : Natural := 0;
begin
-- Compute Fore, allowing for Aft digits and the decimal dot
Fore := To'Length - Field'Max (1, Aft) - 1;
-- Allow for Exp and two more for E+ or E- if exponent present
if Exp /= 0 then
Fore := Fore - 2 - Exp;
end if;
-- Make sure we have enough room
if Fore < 1 then
raise Layout_Error;
end if;
-- Do the conversion and check length of result
Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
if Ptr > To'Length then
raise Layout_Error;
else
To := Buf (1 .. Ptr);
end if;
end Puts_Dec;
--------------
-- Puts_Dec --
--------------
procedure Puts_LLD
(To : out String;
Item : Long_Long_Integer;
Aft : Field;
Exp : Field;
Scale : Integer)
is
Buf : String (1 .. Field'Last);
Fore : Integer;
Ptr : Natural := 0;
begin
Fore :=
(if Exp = 0 then To'Length - 1 - Aft else To'Length - 2 - Aft - Exp);
if Fore < 1 then
raise Layout_Error;
end if;
Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
if Ptr > To'Length then
raise Layout_Error;
else
To := Buf (1 .. Ptr);
end if;
end Puts_LLD;
end Ada.Text_IO.Decimal_Aux;
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