libstdc++-v3/testsuite/performance/22_locale/narrow_widen_char.cc

// Copyright (C) 2003-2021 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/>.


#include <locale>
#include <testsuite_performance.h>

int main()
{
  using namespace std;
  using namespace __gnu_test;

  time_counter time;
  resource_counter resource;
  char bufin[] = "This was an attempt to bypass string construction just for test.";
  char bufout[sizeof(bufin)];

  locale loc;
  const ctype<char>& ct = use_facet<ctype<char> >(loc);

  // narrow
  start_counters(time, resource);
  for (long i = 0; i < 1000000000; ++i)
    ct.narrow(i % 128, '*');
  stop_counters(time, resource);
  report_performance(__FILE__, "narrow", time, resource);
  clear_counters(time, resource);

  // narrow array
  start_counters(time, resource);
  for (long i = 0; i < 100000000; ++i)
    ct.narrow(bufin, bufin+sizeof(bufin), '*', bufout);
  stop_counters(time, resource);
  report_performance(__FILE__, "narrow_array", time, resource);
  clear_counters(time, resource);

  // widen
  start_counters(time, resource);
  for (long i = 0; i < 1000000000; ++i)
    ct.widen(i % 128);
  stop_counters(time, resource);
  report_performance(__FILE__, "widen", time, resource);
  clear_counters(time, resource);

  // widen array
  start_counters(time, resource);
  for (long i = 0; i < 100000000; ++i)
    ct.widen(bufin, bufin+sizeof(bufin), bufout);
  stop_counters(time, resource);
  report_performance(__FILE__, "widen_array", time, resource);

  return 0;
}