progress_meter.h

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// Author(s): Wieger Wesselink
// Copyright: see the accompanying file COPYING or copy at
// https://github.com/mCRL2org/mCRL2/blob/master/COPYING
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
 
#ifndef MCRL2_UTILITIES_PROGRESS_METER_H
#define MCRL2_UTILITIES_PROGRESS_METER_H
 
#include <cstddef>
#include "mcrl2/utilities/logger.h"
 
namespace mcrl2 {
 
namespace utilities {
 
class progress_meter
{
  protected:
    std::size_t n;
    std::size_t N;
 
  public:
    progress_meter(std::size_t N_ = 0)
      : n(0), N(N_)
    {}
 
    void set_size(std::size_t N_)
    {
      N = N_;
    }
 
    void step()
    {
      n++;
      if (N < 1000 || (n % (N / 1000) == 0) || n == N)
      {
        std::size_t percentage = 1000 * n / N;
        mCRL2log(log::status) << (percentage / 10) << "." << (percentage % 10) << " percent completed" << std::endl;
      }
    }
};
 
} // namespace utilities
 
} // namespace mcrl2
 
#endif // MCRL2_UTILITIES_PROGRESS_METER_H