timeutils.h

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#ifndef TIMEUTILS_H_
#define TIMEUTILS_H_
 
#include <stdbool.h>
#include <stdint.h>
 
typedef struct
{
    uint64_t sec;     
    uint32_t nanosec; 
} TimestampU;
 
typedef struct
{
    int64_t sec;     
    int32_t nanosec; 
} TimestampI;
 
#define NANO_PREFIX (1000000000)      
#define NANO_PREFIX_F (1000000000.0f) 
 
#define T_SEC_PER_MINUTE (60)                                        
#define T_SEC_PER_HOUR (60 * T_SEC_PER_MINUTE)                       
#define T_SEC_PER_DAY (24 * T_SEC_PER_HOUR)                          
#define T_SEC_PER_YEAR (365 * T_SEC_PER_DAY)                         
#define T_SEC_PER_LEAPYEAR (366 * T_SEC_PER_DAY)                     
#define T_SEC_PER_FOURYEAR (3 * T_SEC_PER_YEAR + T_SEC_PER_LEAPYEAR) 
 
// TIME OPERATIONS
TimestampI *tsUToI(TimestampI *ti, const TimestampU *tu);
 
TimestampI *addTime(TimestampI *r, const TimestampI *a, const TimestampI *b);
 
TimestampI *subTime(TimestampI *r, const TimestampI *a, const TimestampI *b);
 
TimestampI *divTime(TimestampI *r, const TimestampI *a, int divisor);
 
uint64_t nsU(const TimestampU *t); //
 
int64_t nsI(const TimestampI *t);
 
void normTime(TimestampI *t); // normalize time
 
int64_t tsToTick(const TimestampI *ts, uint32_t tps);
 
TimestampI *nsToTsI(TimestampI *r, int64_t ns);
 
bool nonZeroI(const TimestampI *a);
 
void tsPrint(char *str, const TimestampI *ts);
 
#endif /* TIMEUTILS_H_ */