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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . W I D _ L L U --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2005 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 2, 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
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;
|
