1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- S Y S T E M . V A L _ D E C -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1992-2013, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32with System.Val_Real; use System.Val_Real; 33 34package body System.Val_Dec is 35 36 ------------------ 37 -- Scan_Decimal -- 38 ------------------ 39 40 -- For decimal types where Size < Integer'Size, it is fine to use 41 -- the floating-point circuit, since it certainly has sufficient 42 -- precision for any reasonable hardware, and we just don't support 43 -- things on junk hardware. 44 45 function Scan_Decimal 46 (Str : String; 47 Ptr : not null access Integer; 48 Max : Integer; 49 Scale : Integer) return Integer 50 is 51 Val : Long_Long_Float; 52 begin 53 Val := Scan_Real (Str, Ptr, Max); 54 return Integer (Val * 10.0 ** Scale); 55 end Scan_Decimal; 56 57 ------------------- 58 -- Value_Decimal -- 59 ------------------- 60 61 -- Again, we use the real circuit for this purpose 62 63 function Value_Decimal (Str : String; Scale : Integer) return Integer is 64 begin 65 return Integer (Value_Real (Str) * 10.0 ** Scale); 66 end Value_Decimal; 67 68end System.Val_Dec; 69