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Diffstat (limited to 'gcc/ada/s-widllu.adb')
| -rw-r--r-- | gcc/ada/s-widllu.adb | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/gcc/ada/s-widllu.adb b/gcc/ada/s-widllu.adb new file mode 100644 index 00000000000..6b90031ff82 --- /dev/null +++ b/gcc/ada/s-widllu.adb @@ -0,0 +1,77 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUNTIME COMPONENTS -- +-- -- +-- S Y S T E M . W I D _ L L U -- +-- -- +-- B o d y -- +-- -- +-- $Revision: 1.5 $ -- +-- -- +-- Copyright (C) 1992,1993,1994 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, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, 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. -- +-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +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; |