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/***************************************************************************
    aktimelib.h  -  description

    begin                : Thu Feb 21 2002
    copyright            : (C) 2002 by A Kopmann
    email                : kopmann@ipe.fzk.de
    status               :
    test                 :
    history              :
 ***************************************************************************/


#ifndef AKTIMELIB_H
#define AKTIMELIB_H

#include <akutil/procDuration.h>
#include <akutil/aksingleton.h>
#include <akutil/aksingletoncleaner.h>


class akTimeLib :  public akSingleton
{
public:
  // akSingletonCleaner needs to delete this call at program end! 
  friend class akSingletonCleaner;

  
protected:
  akTimeLib();

public: // Windows does not allow protected destructors??
  ~akTimeLib(){
   cleaner.setObject( 0 );
     //instance = (akTimeLib) 0;  // ???
  }
  

  
public:

  static akTimeLib *getReference();


  void init(const char *inifile="aktimelib.ini", FILE *fout=0);

  void dump(FILE *fout=stdout){
    
     fprintf(fout, "akTimeLib: \n");

     // TODO: Give information about the next
     // change in the number of leap seconds
     // --> Table of second counters...
     
  }

  void test();


  time_t convertGPSToUTC(unsigned long t_gps);


  unsigned long  convertUTCToGPS(time_t t_utc);

  int isLeapSecond(unsigned long t_gps);

  int nLeapSeconds(unsigned long t_gps);

  int addLeapSecond();
  
private:

  static akTimeLib instance;

  static akSingletonCleaner cleaner;



  unsigned long gpsDelay;

  int leapSeconds;

  unsigned long nextLeapSecond;

  unsigned long *leapSecGps;

  unsigned long *leapSecUtc;
  
  int *leapSecN;

  int nLeapSecs;

  static int noLeapSecTable;
    
};



#endif