// -*- 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 

