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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 push_pop_test.hpp

 * Contains a push performance test.

 */

#ifndef PB_DS_PUSH_TEST_HPP

#define PB_DS_PUSH_TEST_HPP

#include <performance/time/timing_test_base.hpp>

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

#include <performance/io/xml_formatter.hpp>

#include <common_type/priority_queue/string_form.hpp>

#include <iterator>

namespace __gnu_pbds

{

  namespace test

  {

    namespace detail

    {

      template<typename It, class Cntnr>

      class push_pop_push_pop_functor

      {

      public:

        push_pop_push_pop_functor(It ins_it_b,  It ins_it_e)

        : m_ins_it_b(ins_it_b), m_ins_it_e(ins_it_e)

        { }

        void

        operator()(std::size_t resolution)

        {

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

            {

              Cntnr cntnr;

              for (It ins_it = m_ins_it_b; ins_it != m_ins_it_e; ++ins_it)

                cntnr.push((typename Cntnr::const_reference)(ins_it->first));

              while (!cntnr.empty())

                cntnr.pop();

            }

        }

      private:

        const It m_ins_it_b;

        const It m_ins_it_e;

      };

    } // namespace detail

    template<typename It>

    class push_pop_test : private __gnu_pbds::test::detail::timing_test_base

    {

    public:

      push_pop_test(It ins_b, size_t ins_vn, size_t ins_vs, size_t ins_vm)

      : m_ins_b(ins_b), m_ins_vn(ins_vn), m_ins_vs(ins_vs), m_ins_vm(ins_vm)

      { }

      template<typename Cntnr>

      void

      operator()(Cntnr);

    private:

      push_pop_test(const push_pop_test&);

      template<typename Cntnr>

      void

      push(Cntnr, It ins_it_b, It ins_it_e)

      {

        Cntnr cntnr;

        for (It ins_it = ins_it_b; ins_it != ins_it_e; ++ins_it)

          cntnr.push((typename Cntnr::const_reference)(*ins_it));

      }

      const It m_ins_b;

      const size_t m_ins_vn;

      const size_t m_ins_vs;

      const size_t m_ins_vm;

    };

    template<typename It>

    template<typename Cntnr>

    void

    push_pop_test<It>::

    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 i = 0; m_ins_vn + i * m_ins_vs < m_ins_vm; ++i)

        {

          const size_t v = m_ins_vn + i * m_ins_vs;

          It ins_it_b = m_ins_b;

          It ins_it_e = m_ins_b;

          std::advance(ins_it_e, v);

          __gnu_pbds::test::detail::push_pop_push_pop_functor<It, Cntnr>

            fn(ins_it_b, ins_it_e);

          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