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// -*- C++ -*-

// Copyright (C) 2005, 2006, 2007, 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 tree_order_statistics_test.hpp

 * Contains a test for order_statisticsing trees

 */

#ifndef PB_DS_TREE_ORDER_STATISTICS_TEST_HPP

#define PB_DS_TREE_ORDER_STATISTICS_TEST_HPP

#include <performance/time/timing_test_base.hpp>

#include <performance/io/xml_formatter.hpp>

#include <common_type/assoc/string_form.hpp>

#include <ext/pb_ds/detail/type_utils.hpp>

#include <iterator>

#include <cstdlib>

namespace __gnu_pbds

{

  namespace test

  {

    namespace detail

    {

      template<typename Cntnr, bool Native>

      class order_statistics_functor

      {

      public:

        order_statistics_functor(Cntnr& container) : m_r_container(container)

        { }

        void

        operator()(std::size_t resolution)

        {

          enum

            {

              support_detected =

              __gnu_pbds::test::detail::tree_supports_order_statistics<Cntnr>::value

            };

          PB_DS_STATIC_ASSERT(correct_type, support_detected);

          for (std::size_t i = 0; i < resolution; ++i)

            {

              typename Cntnr::const_iterator it = m_r_container.begin();

              typename Cntnr::const_iterator e = m_r_container.end();

              const size_t max_size = m_r_container.size();

              while (it != e)

                if (m_r_container.order_of_key(*(it++)) > max_size)

                  std::abort();

            }

        }

      private:

        Cntnr& m_r_container;

      };

      template<typename Cntnr>

      class order_statistics_functor<Cntnr, false>

      {

      public:

        order_statistics_functor(Cntnr& container) : m_r_container(container)

        { }

        void

        operator()(std::size_t resolution)

        {

          for (std::size_t i = 0; i < resolution; ++i)

            {

              typedef typename Cntnr::const_iterator const_iterator;

              const_iterator b = m_r_container.begin();

              const_iterator e = m_r_container.end();

              const_iterator it = b;

              const size_t max_size = m_r_container.size();

              while (it != e)

                {

                  const_iterator f_it = m_r_container.find(*(it++));

                  if (static_cast<size_t>(std::distance(b, f_it)) > max_size)

                    std::abort();

                }

            }

        }

      private:

        Cntnr& m_r_container;

      };

    } // namespace detail

    template<bool Support_Order_Statistics>

    class tree_order_statistics_test

    : private __gnu_pbds::test::detail::timing_test_base

    {

    public:

      tree_order_statistics_test(size_t vn, size_t vs, size_t vm)

      : m_vn(vn), m_vs(vs), m_vm(vm)

      { }

      template<typename Cntnr>

      void

      operator()(Cntnr);

    private:

      tree_order_statistics_test(const tree_order_statistics_test& );

      template<typename Cntnr>

      void

      order_statistics(Cntnr& r_container, __gnu_pbds::detail::true_type);

      template<typename Cntnr>

      void

      order_statistics(Cntnr& r_container, __gnu_pbds::detail::false_type);

    private:

      const size_t m_vn;

      const size_t m_vs;

      const size_t m_vm;

    };

    template<bool Support_Order_Statistics>

    template<typename Cntnr>

    void

    tree_order_statistics_test<Support_Order_Statistics>::

    operator()(Cntnr)

    {

      typedef xml_result_set_performance_formatter formatter_type;

      formatter_type res_set_fmt(string_form<Cntnr>::name(),

                                 string_form<Cntnr>::desc());

      for (size_t v = m_vn; v < m_vm; v += m_vs)

        {

          Cntnr cntnr;

          for (size_t ins = 0; ins < v; ++ ins)

            cntnr.insert((typename Cntnr::value_type)ins);

          __gnu_pbds::test::detail::order_statistics_functor<Cntnr, Support_Order_Statistics>

            fn(cntnr);

          const double res =

            __gnu_pbds::test::detail::timing_test_base::operator()(fn);

          res_set_fmt.add_res(v, res / v);

        }

    }

  } // namespace test

} // namespace __gnu_pbds

#endif