| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . F O R E _ R E A L -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1992-2021, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| package body System.Fore_Real is |
| |
| ---------------- |
| -- Fore_Fixed -- |
| ---------------- |
| |
| function Fore_Fixed (Lo, Hi : Long_Float) return Natural is |
| T : Long_Float := Long_Float'Max (abs Lo, abs Hi); |
| F : Natural; |
| |
| begin |
| -- Initial value of 2 allows for sign and mandatory single digit |
| |
| F := 2; |
| |
| -- Loop to increase Fore as needed to include full range of values |
| |
| while T >= 10.0 loop |
| T := T / 10.0; |
| F := F + 1; |
| end loop; |
| |
| return F; |
| end Fore_Fixed; |
| |
| end System.Fore_Real; |
