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jeremybenn |
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S Y S T E M . V A L _ D E C --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with System.Val_Real; use System.Val_Real;
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package body System.Val_Dec is
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------------------
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-- Scan_Decimal --
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------------------
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-- For decimal types where Size < Integer'Size, it is fine to use
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-- the floating-point circuit, since it certainly has sufficient
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-- precision for any reasonable hardware, and we just don't support
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-- things on junk hardware!
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function Scan_Decimal
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(Str : String;
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Ptr : not null access Integer;
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Max : Integer;
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Scale : Integer) return Integer
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is
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Val : Long_Long_Float;
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begin
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Val := Scan_Real (Str, Ptr, Max);
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return Integer (Val * 10.0 ** Scale);
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end Scan_Decimal;
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-------------------
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-- Value_Decimal --
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-------------------
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-- Again, we use the real circuit for this purpose
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function Value_Decimal (Str : String; Scale : Integer) return Integer is
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begin
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return Integer (Value_Real (Str) * 10.0 ** Scale);
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end Value_Decimal;
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end System.Val_Dec;
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