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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . V A L _ D E C --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2006, 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 2, 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- 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;
|
