-- --
-- GNAT LIBRARY COMPONENTS --
-- --
--- A D A . S T R I N G S . W I D E _ W I D E _ B O U N D E D . --
--- W I D E _ W I D E _ H A S H --
+-- ADA.STRINGS.WIDE_WIDE_BOUNDED.WIDE_WIDE_HASH --
-- --
-- B o d y --
-- --
--- Copyright (C) 2004-2006 Free Software Foundation, Inc. --
--- --
--- This specification is derived from the Ada Reference Manual for use with --
--- GNAT. The copyright notice above, and the license provisions that follow --
--- apply solely to the contents of the part following the private keyword. --
+-- Copyright (C) 2004-2009, 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 2, or (at your option) any later ver- --
+-- 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. 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. --
+-- 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/>. --
-- --
-- This unit was originally developed by Matthew J Heaney. --
------------------------------------------------------------------------------
--- Note: source of this algorithm: GNAT.HTable.Hash (g-htable.adb)
+with System.String_Hash;
function Ada.Strings.Wide_Wide_Bounded.Wide_Wide_Hash
(Key : Bounded.Bounded_Wide_Wide_String)
return Containers.Hash_Type
is
use Ada.Containers;
-
- function Rotate_Left
- (Value : Hash_Type;
- Amount : Natural) return Hash_Type;
- pragma Import (Intrinsic, Rotate_Left);
-
- Tmp : Hash_Type;
-
+ function Hash is new System.String_Hash.Hash
+ (Wide_Wide_Character, Wide_Wide_String, Hash_Type);
begin
- Tmp := 0;
- for J in 1 .. Bounded.Length (Key) loop
- Tmp := Rotate_Left (Tmp, 3) +
- Wide_Wide_Character'Pos (Bounded.Element (Key, J));
- end loop;
-
- return Tmp;
+ return Hash (Bounded.To_Wide_Wide_String (Key));
end Ada.Strings.Wide_Wide_Bounded.Wide_Wide_Hash;
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