time_utils.h

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#pragma once
 
#include <stdbool.h>
#include <stdint.h>
#include <time.h>
 
// TODO: Time zone handling is NOT compliant with the c standard (for now). Daylight savings time.
typedef struct
{
    int64_t secondsOffset;
} _time_zone_t;
 
void _time_zone_init(void);
 
_time_zone_t* _time_zone(void);
 
bool _time_is_leap_year(int32_t year);
 
int32_t _time_days_in_month(int32_t month, int32_t year);
 
void _time_normalize(struct tm* timePtr);
 
void _time_day_of_week(struct tm* timePtr);
 
void _time_day_of_year(struct tm* timePtr);