time_conversion.h

Go to the documentation of this file.

// TAKEN FROM https://svn.code.sf.net/p/gnsstk/code/trunk/src/time_conversion.h

#ifndef _C_TIMECONV_H_
#define _C_TIMECONV_H_

#ifdef __cplusplus
extern "C" {
#endif

/*************************************************************************************************/
// preprocessor constant definitions, any related enumerations and descriptors

// error, define to printf or something if you want
#define GNSS_ERROR_MSG(errorMsg)

#ifndef SECONDS_IN_DAY
#define SECONDS_IN_DAY (86400.0)
#endif

#ifndef SECONDS_IN_WEEK
#define SECONDS_IN_WEEK (604800.0)
#endif

int TIMECONV_GetSystemTime(
  unsigned short*     utc_year,     
  unsigned char*      utc_month,    
  unsigned char*      utc_day,      
  unsigned char*      utc_hour,     
  unsigned char*      utc_minute,   
  float*              utc_seconds,  
  unsigned char*      utc_offset,   
  double*             julian_date,  
  unsigned short*     gps_week,     
  double*             gps_tow       
  );


#ifdef WIN32

int TIMECONV_SetSystemTime(
  const unsigned short  utc_year,     
  const unsigned char   utc_month,    
  const unsigned char   utc_day,      
  const unsigned char   utc_hour,     
  const unsigned char   utc_minute,   
  const float           utc_seconds   
  );
#endif


int TIMECONV_GetDayOfWeekFromJulianDate(
  const double julian_date,   
  unsigned char *day_of_week  
  );


int TIMECONV_GetJulianDateFromGPSTime(
  const unsigned short    gps_week,      
  const double            gps_tow,       
  const unsigned char     utc_offset,    
  double*                 julian_date    
  );

int TIMECONV_GetJulianDateFromUTCTime(
 const unsigned short     utc_year,      
 const unsigned char      utc_month,     
 const unsigned char      utc_day,       
 const unsigned char      utc_hour,      
 const unsigned char      utc_minute,    
 const float              utc_seconds,   
 double*                  julian_date    
 );




int TIMECONV_GetGPSTimeFromJulianDate(
  const double            julian_date, 
  const unsigned char     utc_offset,  
  unsigned short*         gps_week,    
  double*                 gps_tow      
  );

int TIMECONV_GetUTCTimeFromJulianDate(
  const double        julian_date,  
  unsigned short*     utc_year,     
  unsigned char*      utc_month,    
  unsigned char*      utc_day,      
  unsigned char*      utc_hour,     
  unsigned char*      utc_minute,   
  float*              utc_seconds   
  );

int TIMECONV_GetGPSTimeFromUTCTime(
  unsigned short     utc_year,     
  unsigned char      utc_month,    
  unsigned char      utc_day,      
  unsigned char      utc_hour,     
  unsigned char      utc_minute,   
  float              utc_seconds,  
  unsigned short*    gps_week,     
  double*            gps_tow       
  );


int TIMECONV_GetGPSTimeFromRinexTime(
  unsigned short     utc_year,     
  unsigned char      utc_month,    
  unsigned char      utc_day,      
  unsigned char      utc_hour,     
  unsigned char      utc_minute,   
  float              utc_seconds,  
  unsigned short*    gps_week,     
  double*            gps_tow       
  );


int TIMECONV_GetUTCTimeFromGPSTime(
  unsigned short     gps_week,     
  double             gps_tow,      
  unsigned short*    utc_year,     
  unsigned char*     utc_month,    
  unsigned char*     utc_day,      
  unsigned char*     utc_hour,     
  unsigned char*     utc_minute,   
  float*             utc_seconds   
  );



int TIMECONV_DetermineUTCOffset(
  double julian_date,       
  unsigned char* utc_offset 
  );

int TIMECONV_GetNumberOfDaysInMonth(
  const unsigned short year,        
  const unsigned char month,        
  unsigned char* days_in_month      
  );


int TIMECONV_IsALeapYear( const unsigned short year );


int TIMECONV_GetDayOfYear(
 const unsigned short utc_year,    // Universal Time Coordinated           [year]
 const unsigned char  utc_month,   // Universal Time Coordinated           [1-12 months] 
 const unsigned char  utc_day,     // Universal Time Coordinated           [1-31 days]
 unsigned short*      dayofyear    // number of days into the year (1-366) [days]
 );


int TIMECONV_GetGPSTimeFromYearAndDayOfYear(
 const unsigned short year,      // The year [year]
 const unsigned short dayofyear, // The number of days into the year (1-366) [days]
 unsigned short*      gps_week,  
 double*              gps_tow    
 );

 
  
#ifdef __cplusplus
}
#endif


#endif // _C_TIMECONV_H_