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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT RUN-TIME COMPONENTS                         --
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--                                                                          --
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--                          S Y S T E M . F O R E                           --
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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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package body System.Fore is
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   ----------
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   -- Fore --
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   ----------
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   function Fore (Lo, Hi : Long_Long_Float) return Natural is
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      T : Long_Long_Float := Long_Long_Float'Max (abs Lo, abs Hi);
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      R : Natural;
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   begin
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      --  Initial value of 2 allows for sign and mandatory single digit
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      R := 2;
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      --  Loop to increase Fore as needed to include full range of values
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      while T >= 10.0 loop
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         T := T / 10.0;
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         R := R + 1;
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      end loop;
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      return R;
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   end Fore;
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end System.Fore;

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