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Timestamp.h

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#ifndef DataFormats_Provenance_Timestamp_h
#define DataFormats_Provenance_Timestamp_h
// -*- C++ -*-
//
// Package:     DataFormats/Provenance
// Class:      Timestamp
// 
//
// Author:      Chris Jones
// Created:     Thu Mar 24 16:23:05 EST 2005
//

// system include files

// user include files

// forward declarations
namespace edm {
   typedef unsigned long long TimeValue_t;
   
class Timestamp
{

   public:
      Timestamp(TimeValue_t iValue) ;
      Timestamp();

      virtual ~Timestamp();

      TimeValue_t value() const;

      // ---------- const member functions ---------------------
      bool operator==(const Timestamp& iRHS) const {
         return timeHigh_ == iRHS.timeHigh_ &&
         timeLow_ == iRHS.timeLow_;
      }
      bool operator!=(const Timestamp& iRHS) const {
         return !(*this == iRHS);
      }

      bool operator<(const Timestamp& iRHS) const {
         if(timeHigh_ == iRHS.timeHigh_) {
            return timeLow_ < iRHS.timeLow_;
         }
         return timeHigh_ < iRHS.timeHigh_;
      }
      bool operator<=(const Timestamp& iRHS) const {
         if(timeHigh_ == iRHS.timeHigh_) {
            return timeLow_ <= iRHS.timeLow_;
         }
         return timeHigh_ <= iRHS.timeHigh_;
      }
      bool operator>(const Timestamp& iRHS) const {
         if(timeHigh_ == iRHS.timeHigh_) {
            return timeLow_ > iRHS.timeLow_;
         }
         return timeHigh_ > iRHS.timeHigh_;
      }
      bool operator>=(const Timestamp& iRHS) const {
         if(timeHigh_ == iRHS.timeHigh_) {
            return timeLow_ >= iRHS.timeLow_;
         }
         return timeHigh_ >= iRHS.timeHigh_;
      }
      
      // ---------- static member functions --------------------
      static const Timestamp& invalidTimestamp();
      static const Timestamp& endOfTime();
      static const Timestamp& beginOfTime();
      
      // ---------- member functions ---------------------------

   private:
      //Timestamp(const Timestamp&); // allow default

      //const Timestamp& operator=(const Timestamp&); // allow default

      // ---------- member data --------------------------------
      // ROOT does not support ULL
      //TimeValue_t time_;
      unsigned int timeLow_;
      unsigned int timeHigh_;
};

}
#endif

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