JDAQUTCExtended.hh

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#ifndef __JDAQUTCEXTENDED__
#define __JDAQUTCEXTENDED__

/**
 * \author rbruijn
 */

//#include <cstdint> // only in C++0x, will give uint32_t
#include <istream>
#include <ostream>
#include <iomanip>
#include <limits>

#include "JDAQRoot.hh"


namespace KM3NETDAQ {

  /**
   * Data structure for UTC time.
   */
  class JDAQUTCExtended 
  {
  public:
  
    typedef unsigned int JUINT32_t; // preferably uint32_t

    friend size_t getSizeof<JDAQUTCExtended>();
    friend JReader& operator>>(JReader&, JDAQUTCExtended&);
    friend JWriter& operator<<(JWriter&, const JDAQUTCExtended&);


    /** 
     * Default constructor.
     */
    JDAQUTCExtended() :
      UTC_seconds(0),
      UTC_16nanosecondcycles(0)
    {}


    /**
     * Constructor.
     *
     * \param  seconds     seconds [s]
     * \param  cycles      cycles [16 ns] 
     */    
    JDAQUTCExtended(const JUINT32_t seconds,
                    const JUINT32_t cycles):
      UTC_seconds(seconds),
      UTC_16nanosecondcycles(cycles)
    {}
   

    /**
     * Constructor.
     *
     * \param  nanoseconds time [ns]
     */    
    JDAQUTCExtended(const double nanoseconds)
    {
      setTimeNanoSecond(nanoseconds);
    }


    /** 
     * Virtual destructor.
     */
    virtual ~JDAQUTCExtended()
    {}
        

    /** 
     * Get time.
     *
     * \return             time [s]
     */
    JUINT32_t getUTCseconds() const
    {
      return (UTC_seconds & getMask());
    }
        

    /** 
     * Get time.
     *
     * \return             time [16 ns]
     */
    JUINT32_t getUTC16nanosecondcycles() const
    {
      return UTC_16nanosecondcycles;
    }
        

    /** 
     * Get time (limited to 16 ns cycles).
     *
     * \return             time [ns]
     */
    double getTimeNanoSecond() const
    {
      return getUTCseconds() * 1.0e9  +  getUTC16nanosecondcycles() * getTick();
    }
    

    /** 
     * Set time.
     *
     * \param  utc_ns      time [ns]
     */
    void setTimeNanoSecond(const double utc_ns)
    {
      UTC_seconds            = (unsigned int) ( utc_ns / 1.0e9);
      UTC_16nanosecondcycles = (unsigned int) ((utc_ns - UTC_seconds*1.0e9) / getTick());
    }


    /**
     * Get minimum possible value.
     *
     * \return                  minimum possible value
     */
    static JDAQUTCExtended min()
    {
      return JDAQUTCExtended(0,0);
    }


    /**
     * Get maximum possible value.
     *
     * \return                  maximum possible value
     */
    static JDAQUTCExtended max()
    {
      return JDAQUTCExtended(std::numeric_limits<JUINT32_t>::max(),
                             std::numeric_limits<JUINT32_t>::max());
    }


    /**
     * Get mask for seconds data.
     *
     * \return                  mask
     */
    static JUINT32_t getMask() 
    {
      return 0x7FFFFFFF;
    }


    /**
     * Get number of nano-seconds per tick.
     *
     * \return                  time [ns]
     */
    static double getTick()
    {
      return 16.0;
    }


    /**
     * Read UTC time.
     *
     * \param  in            intput stream
     * \param  utc           UTC extended time
     * \return               intput stream
     */
    friend inline std::istream& operator>>(std::istream& in, JDAQUTCExtended& utc)
    {
      in >> utc.UTC_seconds;
      in.get();
      in >> utc.UTC_16nanosecondcycles;
      
      return in;
    }


    /**
     * Write UTC time.
     *
     * \param  out           output stream
     * \param  utc           UTC extended time
     * \return               output stream
     */
    friend inline std::ostream& operator<<(std::ostream& out, const JDAQUTCExtended& utc)
    {
      using namespace std;
      
      const char c = out.fill();

      out << setw(10) << utc.getUTCseconds();
      out << ':';
      out << setw(10) << setfill('0') << utc.getUTC16nanosecondcycles() << setfill(c);
      
      return out;
    }
    

    ClassDef(JDAQUTCExtended,1);


  protected:
    JUINT32_t UTC_seconds;
    JUINT32_t UTC_16nanosecondcycles;
  };


  /**
   * Less than operator for UTC times.
   *
   * \param  first       UTC time
   * \param  second      UTC time
   * \result             true if first UTC time earlier than second UTC time; else false
   */
  inline bool operator<(const JDAQUTCExtended& first, const JDAQUTCExtended& second)
  {
    if (first.getUTCseconds() == second.getUTCseconds())
      return first.getUTC16nanosecondcycles() < second.getUTC16nanosecondcycles();
    else
      return first.getUTCseconds() < second.getUTCseconds();
  }

 
  /**
   * Equal operator for UTC times.
   *
   * \param  first       UTC time
   * \param  second      UTC time
   * \result             true if first UTC time equal second UTC time; else false
   */
  inline bool operator==(const JDAQUTCExtended& first, const JDAQUTCExtended& second)
  {
    return (first.getUTCseconds()            == second.getUTCseconds()            &&
            first.getUTC16nanosecondcycles() == second.getUTC16nanosecondcycles());
  }

 
  /**
   * Not equal operator for UTC times.
   *
   * \param  first       UTC time
   * \param  second      UTC time
   * \result             true if first UTC time not equal second UTC time; else false
   */
  inline bool operator!=(const JDAQUTCExtended& first, const JDAQUTCExtended& second)
  {
    return !(first == second);
  }
}

#endif