search_n.cc

Mac OS X 10.4.9 for x86 Source Code gcc 实现源代码

// Copyright (C) 2004 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 2, 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 COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

#define DISABLE_ITERATOR_DEBUG 1

#include<cstdlib>
#include<vector>
#include<algorithm>

#include<sstream>
#include<testsuite_performance.h>
#include<testsuite_iterators.h>

using namespace std;
using namespace __gnu_test;

const int length = 10000000;
const int match_length = 3;
int array[length];

int
main(void)
{
  time_counter time;
  resource_counter resource;
  int match = rand() % (match_length - 1);
  for(int i = 0; i < length; i++)
    {
      array[i] = (match != 0) ? 1 : 0;
      if(--match < 0) match = rand() % (match_length - 1);
    }
  test_container<int, forward_iterator_wrapper> fcon(array, array + length);
  start_counters(time, resource);
  for(int i = 0; i < 100; i++)
    search_n(fcon.begin(), fcon.end(), 10, 1);
  stop_counters(time, resource);
  report_performance(__FILE__, "forward iterator", time, resource);
  clear_counters(time, resource);

  test_container<int, random_access_iterator_wrapper> rcon(array, array + length);
  start_counters(time, resource);
  for(int i = 0; i < 100; i++)
    search_n(rcon.begin(), rcon.end(), 10, 1);
  stop_counters(time, resource);
  report_performance(__FILE__, "random acess iterator", time, resource);
  clear_counters(time, resource);
}