#pragma once
#include <stdint.h>

#define SYS_TIME_FLAG_VALID        0x0001u
#define SYS_TIME_FLAG_TZ_KNOWN     0x0002u
#define SYS_TIME_FLAG_UEFI         0x0004u
#define SYS_TIME_FLAG_FALLBACK     0x0008u
#define SYS_TIME_FLAG_RTC          0x0010u
#define SYS_TIME_FLAG_DAYLIGHT     0x0020u
#define SYS_TIME_UNSPECIFIED_TZ    2047

// Calendar wall-clock time maintained by the kernel. DayOfWeek uses the
// Win32 convention: 0 = Sunday, 1 = Monday, ... 6 = Saturday.
// TimeZoneMinutes is minutes east of UTC for the returned local calendar.
// EpochSeconds is UTC seconds since 1970-01-01 00:00:00.
typedef struct SYS_SYSTEM_TIME {
    uint16_t Year;
    uint8_t  Month;
    uint8_t  Day;
    uint8_t  Hour;
    uint8_t  Minute;
    uint8_t  Second;
    uint8_t  DayOfWeek;
    uint16_t Millisecond;
    uint16_t Flags;
    uint32_t Nanosecond;
    int16_t  TimeZoneMinutes;
    uint16_t Reserved0;
    uint64_t EpochSeconds;
    uint64_t TickMicroseconds;
} SYS_SYSTEM_TIME;