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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 mod_based_range_hashing.hpp
+ * Contains a range hashing policy base.
+ */
+
+#ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP
+#define PB_DS_MOD_BASED_RANGE_HASHING_HPP
+
+namespace __gnu_pbds
+{
+
+ namespace detail
+ {
+
+#define PB_DS_CLASS_T_DEC \
+ template<typename Size_Type>
+
+#define PB_DS_CLASS_C_DEC \
+ mod_based_range_hashing< \
+ Size_Type>
+
+ template<typename Size_Type>
+ class mod_based_range_hashing
+ {
+ protected:
+ typedef Size_Type size_type;
+
+ protected:
+ void
+ swap(PB_DS_CLASS_C_DEC& other);
+
+ void
+ notify_resized(size_type size);
+
+ inline size_type
+ range_hash(size_type hash) const;
+
+ private:
+ size_type m_size;
+ };
+
+ PB_DS_CLASS_T_DEC
+ void
+ PB_DS_CLASS_C_DEC::
+ swap(PB_DS_CLASS_C_DEC& other)
+ {
+ std::swap(m_size, other.m_size);
+ }
+
+ PB_DS_CLASS_T_DEC
+ void
+ PB_DS_CLASS_C_DEC::
+ notify_resized(size_type size)
+ {
+ m_size = size;
+ }
+
+ PB_DS_CLASS_T_DEC
+ inline typename PB_DS_CLASS_C_DEC::size_type
+ PB_DS_CLASS_C_DEC::
+ range_hash(size_type hash) const
+ {
+ return (hash % m_size);
+ }
+
+#undef PB_DS_CLASS_T_DEC
+#undef PB_DS_CLASS_C_DEC
+
+ } // namespace detail
+
+} // namespace __gnu_pbds
+
+#endif // #ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP