Subversion Repositories scarts

// 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// 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.

#include <cstdio>

#include <fstream>

#include <string>

#include <testsuite_performance.h>

// libstdc++/15002

int main()

{

  using namespace std;

  using namespace __gnu_test;

  time_counter time;

  resource_counter resource;

  const char filename[] = "tmp_getline.txt";

  const unsigned lines = 1000000;

  const unsigned line_length = 200;

  char* line = new char[line_length + 2];

  // Construct data.

  {

    memset(line, 'x', line_length);

    line[line_length] = '\n';

    line[line_length + 1] = '\0';

    ofstream out(filename);

    for (unsigned i = 0; i < lines; ++i)

      out << line;

  }

  // C

  {

    // Fill the cache.

    FILE *file = fopen(filename, "r");

    while (fgets(line, line_length + 2, file));

    fclose(file);

    file = fopen(filename, "r");

    start_counters(time, resource);

    while (fgets(line, line_length + 2, file));

    stop_counters(time, resource);

    fclose(file);

    report_performance(__FILE__, "C (fgets)", time, resource);

    clear_counters(time, resource);

  }

  // getline(basic_istream<_CharT, _Traits>& __in,

  //         basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim)

  {

    ifstream file(filename);

    string string_line;

    start_counters(time, resource);

    while (getline(file, string_line));

    stop_counters(time, resource);

    report_performance(__FILE__, "C++ (string)", time, resource);

    clear_counters(time, resource);

  }

  // getline(char_type* __s, streamsize __n, char_type __delim)

  {

    ifstream file(filename);

    start_counters(time, resource);

    while (file.getline(line, line_length + 2));

    stop_counters(time, resource);

    report_performance(__FILE__, "C++ (char array)", time, resource);

    clear_counters(time, resource);

  }

  delete[] line;

  unlink(filename);

  return 0;

}