1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- S Y S T E M . W I D _ L L U -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32with System.Unsigned_Types; use System.Unsigned_Types; 33 34package body System.Wid_LLU is 35 36 ------------------------------ 37 -- Width_Long_Long_Unsigned -- 38 ------------------------------ 39 40 function Width_Long_Long_Unsigned 41 (Lo, Hi : Long_Long_Unsigned) 42 return Natural 43 is 44 W : Natural; 45 T : Long_Long_Unsigned; 46 47 begin 48 if Lo > Hi then 49 return 0; 50 51 else 52 -- Minimum value is 2, one for sign, one for digit 53 54 W := 2; 55 56 -- Get max of absolute values, but avoid bomb if we have the maximum 57 -- negative number (note that First + 1 has same digits as First) 58 59 T := Long_Long_Unsigned'Max (Lo, Hi); 60 61 -- Increase value if more digits required 62 63 while T >= 10 loop 64 T := T / 10; 65 W := W + 1; 66 end loop; 67 68 return W; 69 end if; 70 71 end Width_Long_Long_Unsigned; 72 73end System.Wid_LLU; 74