////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2014-2023, Lawrence Livermore National Security, LLC.
// Produced at the Lawrence Livermore National Laboratory.
// Written by the LBANN Research Team (B. Van Essen, et al.) listed in
// the CONTRIBUTORS file. <lbann-dev@llnl.gov>
//
// LLNL-CODE-697807.
// All rights reserved.
//
// This file is part of LBANN: Livermore Big Artificial Neural Network
// Toolkit. For details, see http://software.llnl.gov/LBANN or
// https://github.com/LLNL/LBANN.
//
// Licensed under the Apache License, Version 2.0 (the "Licensee"); you
// may not use this file except in compliance with the License.  You may
// obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the license.
////////////////////////////////////////////////////////////////////////////////

#include "lbann/utils/commify.hpp"
#include <algorithm>
#include <sstream>

namespace lbann {
namespace utils {

std::string commify(size_t n)
{
  std::string s = std::to_string(n);
  std::stringstream s2;
  int c = 0;
  for (int j = (int)s.size() - 1; j >= 0; j--) {
    s2 << s[j];
    ++c;
    if (c == 3) {
      if (j > 0) {
        s2 << ",";
        c = 0;
      }
    }
  }
  std::string r = s2.str();
  std::reverse(r.begin(), r.end());
  return r;
}

} // namespace utils
} // namespace lbann
