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// -*- C++ -*-

// Copyright (C) 2005, 2006, 2009, 2011 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 hash_random_int_erase_mem_usage_test.cpp

 * Contains test for erasing random integers.

 */

#include <ext/typelist.h>

#include <testsuite_allocator.h>

#include <performance/io/xml_formatter.hpp>

#include <io/verified_cmd_line_input.hpp>

#include <testsuite_rng.h>

#include <common_type/assoc/common_type.hpp>

#include <performance/assoc/mem_usage/erase_test.hpp>

#include <iostream>

#include <vector>

#include <functional>

struct int_hash : public std::unary_function<int, int>

{

  inline int

  operator()(int i) const

  { return i; }

};

void

usage();

int

main(int argc, char* a_p_argv[])

{

  using namespace __gnu_pbds::test;

  size_t vn = 200;

  size_t vs = 200;

  size_t vm = 2100;

  try

    {

      xml_test_performance_formatter fmt("Size", "Memory (bytes)");

      typedef std::vector<int> vec_t;

      vec_t a_v(vm);

      twister_rand_gen g;

      for (size_t i = 0; i < vm; ++i)

        a_v[i] = static_cast<int>(g.get_unsigned_long());

      vec_t::const_iterator b = a_v.begin();

      erase_test<vec_t::const_iterator> tst(b,  vn, vs, vm);

      typedef __gnu_test::tracker_allocator<char> alloc_t;

      {

        typedef hash_common_types<int, __gnu_pbds::null_type, int_hash, std::equal_to<int>, alloc_t>::performance_tl tl_t;

        tl_t tl;

        __gnu_cxx::typelist::apply(tst, tl);

      }

      {

        typedef native_hash_set<int, 8, int_hash, std::equal_to<int>, std::less<int>, alloc_t> native_t;

        tst(native_t());

      }

    }

  catch (...)

    {

      std::cerr << "Test failed" << std::endl;

      return -1;

    }

  return 0;

}

void

usage()

{

  using namespace std;

  cerr << "usage: hash_random_int_erase_if_test <vn> <vs> <vm>"

       << endl << endl;

  cerr << "This test checks the performance of various associative containers "

          "using their erase method. " << endl;

  cerr << "Specifically, it does the following:" << endl;

  cerr << "*  Creates a vector of random integers " << endl;

  cerr << "*  Inserts the elements into the container" << endl;

  cerr << "*  Erases all the elements, except one, from the constainer"

       << endl << endl;

  cerr << "vn = minimum size of the vector" << endl;

  cerr << "vs = step size of the vector" << endl;

  cerr << "vm = maximum size of the vector" << endl;

}