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-------------------------------------------------------------------------------
--- --
--- GNAT LIBRARY COMPONENTS --
--- --
--- ADA.STRINGS.WIDE_UNBOUNDED.HASH --
--- --
--- B o d y --
--- --
--- Copyright (C) 2004 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. --
--- --
--- 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. --
--- --
--- This unit was originally developed by Matthew J Heaney. --
-------------------------------------------------------------------------------
-
--- Note: source of this algorithm: GNAT.HTable.Hash (g-htable.adb)
-
-function Ada.Strings.Wide_Unbounded.Hash
- (Key : Unbounded_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;
-
-begin
- Tmp := 0;
- for J in 1 .. Key.Last loop
- Tmp := Rotate_Left (Tmp, 1) + Wide_Character'Pos (Key.Reference (J));
- end loop;
-
- return Tmp;
-end Ada.Strings.Wide_Unbounded.Hash;