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1996-09-28
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3KB
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68 lines
------------------------------------------------------------------------------
-- --
-- GNAT RUNTIME COMPONENTS --
-- --
-- S Y S T E M . W I D _ L L U --
-- --
-- B o d y --
-- --
-- $Revision: 1.4 $ --
-- --
-- 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. --
-- --
------------------------------------------------------------------------------
with System.Unsigned_Types; use System.Unsigned_Types;
package body System.Wid_LLU is
------------------------------
-- Width_Long_Long_Unsigned --
------------------------------
function Width_Long_Long_Unsigned
(Lo, Hi : Long_Long_Unsigned)
return Natural
is
W : Natural;
T : Long_Long_Unsigned;
begin
if Lo > Hi then
return 0;
else
-- Minimum value is 2, one for sign, one for digit
W := 2;
-- Get max of absolute values, but avoid bomb if we have the maximum
-- negative number (note that First + 1 has same digits as First)
T := Long_Long_Unsigned'Max (Lo, Hi);
-- Increase value if more digits required
while T >= 10 loop
T := T / 10;
W := W + 1;
end loop;
return W;
end if;
end Width_Long_Long_Unsigned;
end System.Wid_LLU;