78 lines
3.5 KiB
Ada
78 lines
3.5 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUNTIME COMPONENTS --
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-- --
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-- S Y S T E M . W I D _ L L U --
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-- --
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-- B o d y --
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-- --
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-- $Revision: 1.5 $ --
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-- --
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-- Copyright (C) 1992,1993,1994 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, 59 Temple Place - Suite 330, Boston, --
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-- MA 02111-1307, 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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-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
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-- --
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------------------------------------------------------------------------------
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with System.Unsigned_Types; use System.Unsigned_Types;
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package body System.Wid_LLU is
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------------------------------
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-- Width_Long_Long_Unsigned --
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------------------------------
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function Width_Long_Long_Unsigned
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(Lo, Hi : Long_Long_Unsigned)
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return Natural
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is
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W : Natural;
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T : Long_Long_Unsigned;
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begin
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if Lo > Hi then
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return 0;
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else
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-- Minimum value is 2, one for sign, one for digit
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W := 2;
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-- Get max of absolute values, but avoid bomb if we have the maximum
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-- negative number (note that First + 1 has same digits as First)
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T := Long_Long_Unsigned'Max (Lo, Hi);
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-- Increase value if more digits required
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while T >= 10 loop
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T := T / 10;
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W := W + 1;
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end loop;
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return W;
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end if;
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end Width_Long_Long_Unsigned;
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end System.Wid_LLU;
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