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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libstdc++-v3/testsuite/util/hash_fn/string_hash_fn.hpp
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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.
+
+// You should have received a copy of the GNU General Public License
+// along with this library; see the file COPYING3. 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 string_hash_fn.hpp
+ * Contains a string hash function.
+ */
+
+#ifndef PB_DS_STRING_HASH_FN_HPP
+#define PB_DS_STRING_HASH_FN_HPP
+
+#include <string>
+
+namespace __gnu_pbds
+{
+ namespace test
+ {
+ struct string_hash_fn
+ {
+ template<typename String_T>
+ inline size_t
+ operator()(const String_T& r_str) const
+ {
+ typedef typename String_T::const_iterator const_iterator;
+ const_iterator b = r_str.begin();
+ const_iterator e = r_str.end();
+
+ size_t ret = 0;
+ while (b != e)
+ {
+ ret *= 5;
+ ret += static_cast<size_t>(*(b++));
+ }
+ return ret;
+ }
+ };
+ } // namespace test
+} // namespace __gnu_pbds
+
+#endif