diff options
Diffstat (limited to 'gcc/ada/s-widlli.adb')
| -rw-r--r-- | gcc/ada/s-widlli.adb | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/gcc/ada/s-widlli.adb b/gcc/ada/s-widlli.adb new file mode 100644 index 000000000..4d0aa3a5e --- /dev/null +++ b/gcc/ada/s-widlli.adb @@ -0,0 +1,73 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M . W I D _ L L I -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2009, 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 3, 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. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +package body System.Wid_LLI is + + ----------------------------- + -- Width_Long_Long_Integer -- + ----------------------------- + + function Width_Long_Long_Integer + (Lo, Hi : Long_Long_Integer) + return Natural + is + W : Natural; + T : Long_Long_Integer; + + 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_Integer'Max ( + abs (Long_Long_Integer'Max (Lo, Long_Long_Integer'First + 1)), + abs (Long_Long_Integer'Max (Hi, Long_Long_Integer'First + 1))); + + -- 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_Integer; + +end System.Wid_LLI; |