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+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the terms
+// of the GNU General Public License as published by the Free Software
+// Foundation; either version 3, or (at your option) any later
+// version.
+
+// This library is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+
+// 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/>.
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file sample_range_hashing.hpp
+ * Contains a range hashing policy.
+ */
+
+#ifndef PB_DS_SAMPLE_RANGE_HASHING_HPP
+#define PB_DS_SAMPLE_RANGE_HASHING_HPP
+
+// A sample range-hashing functor.
+class sample_range_hashing
+{
+
+public:
+
+ // Size type.
+ typedef size_t size_type;
+
+public:
+
+ // Default constructor.
+ sample_range_hashing();
+
+ // Copy constructor.
+ sample_range_hashing(const sample_range_hashing& other);
+
+ // Swaps content.
+ inline void
+ swap(sample_range_hashing& other);
+
+protected:
+
+ // Notifies the policy object that the container's __size has changed to size.
+ void
+ notify_resized(size_type size);
+
+ // Transforms the __hash value hash into a ranged-hash value.
+ inline size_type
+ operator()(size_type hash) const;
+
+};
+
+#endif // #ifndef PB_DS_SAMPLE_RANGE_HASHING_HPP