69 lines
3.3 KiB
Ada
69 lines
3.3 KiB
Ada
------------------------------------------------------------------------------
|
|
-- --
|
|
-- GNAT COMPILER COMPONENTS --
|
|
-- --
|
|
-- S Y S T E M . V A L _ D E C --
|
|
-- --
|
|
-- B o d y --
|
|
-- --
|
|
-- Copyright (C) 1992-2013, 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 System.Val_Real; use System.Val_Real;
|
|
|
|
package body System.Val_Dec is
|
|
|
|
------------------
|
|
-- Scan_Decimal --
|
|
------------------
|
|
|
|
-- For decimal types where Size < Integer'Size, it is fine to use
|
|
-- the floating-point circuit, since it certainly has sufficient
|
|
-- precision for any reasonable hardware, and we just don't support
|
|
-- things on junk hardware.
|
|
|
|
function Scan_Decimal
|
|
(Str : String;
|
|
Ptr : not null access Integer;
|
|
Max : Integer;
|
|
Scale : Integer) return Integer
|
|
is
|
|
Val : Long_Long_Float;
|
|
begin
|
|
Val := Scan_Real (Str, Ptr, Max);
|
|
return Integer (Val * 10.0 ** Scale);
|
|
end Scan_Decimal;
|
|
|
|
-------------------
|
|
-- Value_Decimal --
|
|
-------------------
|
|
|
|
-- Again, we use the real circuit for this purpose
|
|
|
|
function Value_Decimal (Str : String; Scale : Integer) return Integer is
|
|
begin
|
|
return Integer (Value_Real (Str) * 10.0 ** Scale);
|
|
end Value_Decimal;
|
|
|
|
end System.Val_Dec;
|