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1996-09-28
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3KB
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65 lines
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . V A L _ D E C --
-- --
-- B o d y --
-- --
-- $Revision: 1.1 $ --
-- --
-- Copyright (c) 1992,1993,1994,1995 NYU, All Rights Reserved --
-- --
-- The GNAT library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU Library General Public License as published by --
-- the Free Software Foundation; either version 2, or (at your option) any --
-- later version. The GNAT library is distributed in the hope that it will --
-- be useful, but WITHOUT ANY WARRANTY; without even the implied warranty --
-- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- Library General Public License for more details. You should have --
-- received a copy of the GNU Library General Public License along with --
-- the GNAT library; see the file COPYING.LIB. If not, write to the Free --
-- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. --
-- --
------------------------------------------------------------------------------
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 : access Positive'Base;
Max : Positive'Base;
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;