date.h

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#pragma once

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

// TYPES

typedef struct sys_date_t {
  int64_t seconds;     
  int32_t nanoseconds; 
  int32_t tzoffset;    
} sys_date_t;

typedef enum {
  sys_date_format_iso8601 = 0, 
  sys_date_format_rfc2822 = 1, 
  sys_date_format_log = 2,     
} sys_date_format_t;

// METHODS

bool sys_date_get_now(sys_date_t *date);

bool sys_date_set_now(const sys_date_t *date);

bool sys_date_get_time_utc(const sys_date_t *date, uint8_t *hours,
                            uint8_t *minutes, uint8_t *seconds);

bool sys_date_get_time_local(const sys_date_t *date, uint8_t *hours,
                              uint8_t *minutes, uint8_t *seconds);

bool sys_date_get_date_utc(const sys_date_t *date, uint16_t *year,
                            uint8_t *month, uint8_t *day, uint8_t *weekday);

bool sys_date_get_date_local(const sys_date_t *date, uint16_t *year,
                              uint8_t *month, uint8_t *day, uint8_t *weekday);

bool sys_date_set_time_utc(sys_date_t *date, uint8_t hours, uint8_t minutes,
                            uint8_t seconds);

bool sys_date_set_date_utc(sys_date_t *date, uint16_t year, uint8_t month,
                            uint8_t day);

int64_t sys_date_compare_ns(const sys_date_t *start, const sys_date_t *end);

size_t sys_date_to_string(const sys_date_t *date, sys_date_format_t format,
                          char *buf, size_t buf_size);

#ifdef __cplusplus
}
#endif