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#ifndef RATE_H

#define RATE_H



#include "def.h"

#include <sys/types.h>

#include <time.h>



#define MAX_SAMPLES 20



class Rate{

 private:

  time_t m_last_timestamp;

  time_t m_total_timeused;

  u_int64_t m_count_bytes;

  u_int64_t m_recent_base;

  

  // bandwidth history data

  size_t n_samples;

  time_t m_timestamp_sample[MAX_SAMPLES];

  u_int64_t m_bytes_sample[MAX_SAMPLES];



 public:

  Rate(){ m_last_timestamp = m_total_timeused = (time_t)0;

    m_recent_base = m_count_bytes = 0;

    n_samples=0; for(int i=0;i<MAX_SAMPLES;i++) m_timestamp_sample[i]=0;

  }

  void Reset(){ m_last_timestamp = m_total_timeused = (time_t)0;

    m_recent_base = m_count_bytes;

    n_samples = 0; for(int i=0;i<MAX_SAMPLES;i++) m_timestamp_sample[i]=0;

  }

  void StartTimer();

  void StopTimer();

  void CountAdd(size_t nbytes);

  void operator=(const Rate &ra);

  u_int64_t Count() const { return m_count_bytes; }

  size_t RateMeasure() const;

  size_t RateMeasure(const Rate &ra) const;

  time_t TimeUsed(const time_t *pnow) const;

};



#endif