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// 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 <testsuite_performance.h>

// libstdc++/11722

int main()

{

  using namespace std;

  using namespace __gnu_test;

  time_counter time;

  resource_counter resource;

  const int iterations = 500000;

  const int chunksize = 100;

  char* chunk = new char[chunksize];

  const char* name1 = "/usr/share/dict/words";

  const char* name2 = "/usr/share/dict/linux.words";

  const char* name = name1;

  // C

  FILE* file;

  if (!(file = fopen(name, "r")))

    {

      name = name2;

      if (!(file = fopen(name, "r")))

        exit(1);

    }

  setvbuf(file, 0, _IONBF, 0);

  start_counters(time, resource);

  for (int i = 0; i < iterations; ++i)

    if (fread(chunk, 1, chunksize, file) < chunksize)

      fseek(file, 0, SEEK_SET);

  stop_counters(time, resource);

  fclose(file);

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

  clear_counters(time, resource);

  // C unlocked

  file = fopen(name, "r");

  setvbuf(file, 0, _IONBF, 0);

  start_counters(time, resource);

  for (int i = 0; i < iterations; ++i)

    if (fread_unlocked(chunk, 1, chunksize, file) < chunksize)

      fseek(file, 0, SEEK_SET);

  stop_counters(time, resource);

  fclose(file);

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

  clear_counters(time, resource);

  // C++

  filebuf buf;

  buf.pubsetbuf(0, 0);

  buf.open(name, ios_base::in);

  start_counters(time, resource);

  for (int i = 0; i < iterations; ++i)

    if (buf.sgetn(chunk, chunksize) < chunksize)

      buf.pubseekoff(0, ios::beg);

  stop_counters(time, resource);

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

  delete [] chunk;

  return 0;

}