Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / testsuite / util / hash_fn / string_ranged_hash_fn.hpp

diff --git a/libstdc++-v3/testsuite/util/hash_fn/string_ranged_hash_fn.hpp b/libstdc++-v3/testsuite/util/hash_fn/string_ranged_hash_fn.hpp
new file mode 100644 (file)
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+++ b/libstdc++-v3/testsuite/util/hash_fn/string_ranged_hash_fn.hpp
@@ -0,0 +1,99 @@
+// -*- 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_ranged_hash_fn.hpp
+ * Contains a ranged string hash function.
+ */
+
+#ifndef PB_DS_STRING_RANGED_HASH_FN_HPP
+#define PB_DS_STRING_RANGED_HASH_FN_HPP
+
+#include <string>
+#include <hash_fn/dna_str_limit.hpp>
+
+namespace __gnu_pbds
+{
+  namespace test
+  {
+    template<typename Comb_Fn>
+    class string_ranged_hash_fn : public Comb_Fn
+    {
+    private:
+      size_t _M_limit;
+
+    public:
+      typedef Comb_Fn comb_fn;
+      typedef detail::comb_hash_fn_string_form<comb_fn> string_form;
+
+      inline size_t
+      operator()(const std::string& r_str) const
+      {
+       size_t ret = 0;
+       std::string::const_iterator b = r_str.begin();
+       std::string::const_iterator e = r_str.end();
+
+       size_t i = 0;
+       while (i < _M_limit&&  b != e)
+         {
+           ret *= 5;
+           ret += static_cast<size_t>(*(b++));
+           ++i;
+         }
+       return (comb_fn::operator()(ret));
+      }
+
+      void
+      swap(string_ranged_hash_fn<Comb_Fn>& other)
+      {
+       std::swap(_M_limit, other._M_limit);
+       comb_fn::swap(other);
+      }
+
+      void
+      notify_resized(size_t new_size)
+      {
+       comb_fn::notify_resized(new_size);
+       _M_limit = dna_str_limit(new_size);
+      }
+
+      static std::string
+      name()
+      { return ("string_ranged_hash_fn_" + string_form<comb_fn>::name()); }
+
+      static std::string
+      desc()
+      { return ("string ranged-hash using" + string_form<comb_fn>::desc()); }
+    };
+  } // namespace test
+} // namespace __gnu_pbds
+
+#endif