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1996-09-28
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2KB
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51 lines
------------------------------------------------------------------------------
-- --
-- GNAT RUNTIME COMPONENTS --
-- --
-- S Y S T E M . F O R E --
-- --
-- B o d y --
-- --
-- $Revision: 1.2 $ --
-- --
-- Copyright (c) 1992,1993,1994 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. --
-- --
------------------------------------------------------------------------------
package body System.Fore is
----------
-- Fore --
----------
function Fore (Lo, Hi : Long_Long_Float) return Natural is
T : Long_Long_Float := Long_Long_Float'Max (abs Lo, abs Hi);
R : Natural;
begin
-- Initial value of 2 allows for sign and mandatory single digit
R := 2;
-- Loop to increase Fore as needed to include full range of values
while T >= 10.0 loop
T := T / 10.0;
R := R + 1;
end loop;
return R;
end Fore;
end System.Fore;