timespec.h

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/*
 *  Copyright (C) 2012 Josh Bialkowski (jbialk@mit.edu)
 *
 *  This file is part of mpblocks.
 *
 *  mpblocks 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 of the License, or
 *  (at your option) any later version.
 *
 *  mpblocks 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 mpblocks.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef MPBLOCKS_UTIL_TIMESPEC_H_
#define MPBLOCKS_UTIL_TIMESPEC_H_

#include <ctime>

timespec operator+(const timespec& a, const timespec& b);
timespec operator-(const timespec& a, const timespec& b);

namespace mpblocks {
namespace  utility {

class Timespec : public timespec {
 public:
  Timespec(const timespec& other) : timespec(other) {}

  Timespec(int sec = 0, long int nsec = 0) : timespec{sec, nsec} {}

  Timespec& operator+=(const Timespec& other) {
    return (*this) = (*this) + other;
  }

  Timespec& operator-=(const Timespec& other) {
    return (*this) = (*this) - other;
  }

  double Milliseconds() const{
    return tv_sec + tv_nsec / 1e6;
  }
};

inline bool operator==(const timespec& a, const timespec& b) {
  return a.tv_sec == b.tv_sec && a.tv_nsec == b.tv_nsec;
}

inline bool operator!=(const timespec& a, const timespec& b) {
  return !(a == b);
}

inline bool operator<(const timespec& a, const timespec& b) {
  if (a.tv_sec < b.tv_sec) {
    return true;
  } else if (a.tv_sec > b.tv_sec) {
    return false;
  } else {
    return a.tv_nsec < b.tv_nsec;
  }
}

inline bool operator>(const timespec& a, const timespec& b) {
  if (a.tv_sec > b.tv_sec) {
    return true;
  } else if (a.tv_sec < b.tv_sec) {
    return false;
  } else {
    return a.tv_nsec > b.tv_nsec;
  }
}

inline bool operator<=(const timespec& a, const timespec& b) {
  if (a.tv_sec < b.tv_sec) {
    return true;
  } else if (a.tv_sec > b.tv_sec) {
    return false;
  } else {
    return a.tv_nsec <= b.tv_nsec;
  }
}

inline bool operator>=(const timespec& a, const timespec& b) {
  if (a.tv_sec > b.tv_sec) {
    return true;
  } else if (a.tv_sec < b.tv_sec) {
    return false;
  } else {
    return a.tv_nsec >= b.tv_nsec;
  }
}

Timespec operator+(const Timespec& a, const Timespec& b);
Timespec operator-(const Timespec& a, const Timespec& b);

} // namespace utility
} // namespace mpblocks

#endif  // INCLUDE_MPBLOCKS_UTIL_TIMESPEC_H_