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jlechner |
------------------------------------------------------------------------------
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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) 1992-2005 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 2, 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. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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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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