metadesk/code/base/time.h

#ifdef INTELLISENSE_DIRECTIVES
#	pragma once
#	include "base_types.h"
#endif

////////////////////////////////
//~ allen: Time

typedef enum WeekDay
{
  WeekDay_Sun,
  WeekDay_Mon,
  WeekDay_Tue,
  WeekDay_Wed,
  WeekDay_Thu,
  WeekDay_Fri,
  WeekDay_Sat,
  WeekDay_COUNT,
}
WeekDay;

typedef enum Month
{
  Month_Jan,
  Month_Feb,
  Month_Mar,
  Month_Apr,
  Month_May,
  Month_Jun,
  Month_Jul,
  Month_Aug,
  Month_Sep,
  Month_Oct,
  Month_Nov,
  Month_Dec,
  Month_COUNT,
}
Month;

typedef struct DateTime DateTime;
struct DateTime
{
  U16 micro_sec; // [0,999]
  U16 msec; // [0,999]
  U16 sec;  // [0,60]
  U16 min;  // [0,59]
  U16 hour; // [0,24]
  U16 day;  // [0,30]
  union
  {
    WeekDay week_day;
    U32 wday;
  };
  union
  {
    Month month;
    U32 mon;
  };
  U32 year; // 1 = 1 CE, 0 = 1 BC
};

typedef U64 DenseTime;

////////////////////////////////
//~ rjf: Time Functions

internal DenseTime dense_time_from_date_time(DateTime date_time);
internal DateTime  date_time_from_dense_time(DenseTime time);
internal DateTime  date_time_from_micro_seconds(U64 time);
internal DateTime  date_time_from_unix_time(U64 unix_time);