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set of utility functions that wrap the calendar module and erlangs now() date() and time() functions
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| -module(date_util). | |
| -compile(export_all). | |
| epoch() -> | |
| now_to_seconds(now()) | |
| . | |
| epoch_hires() -> | |
| now_to_seconds_hires(now()) | |
| . | |
| now_to_seconds({Mega, Sec, _}) -> | |
| (Mega * 1000000) + Sec | |
| . | |
| now_to_milliseconds({Mega, Sec, Micro}) -> | |
| now_to_seconds({Mega, Sec, Micro}) * 1000 | |
| . | |
| now_to_seconds_hires({Mega, Sec, Micro}) -> | |
| now_to_seconds({Mega, Sec, Micro}) + (Micro / 1000000) | |
| . | |
| now_to_milliseconds_hires({Mega, Sec, Micro}) -> | |
| now_to_seconds_hires({Mega, Sec, Micro}) * 1000 | |
| . | |
| epoch_gregorian_seconds() -> | |
| calendar:datetime_to_gregorian_seconds({{1970,1,1}, {0,0,0}}) | |
| . | |
| now_to_gregorian_seconds() -> | |
| epoch_to_gregorian_seconds(now()) | |
| . | |
| epoch_to_gregorian_seconds({Mega, Sec, Micro}) -> | |
| epoch_to_gregorian_seconds(now_to_seconds({Mega, Sec, Micro})); | |
| epoch_to_gregorian_seconds(Now) -> | |
| EpochSecs = epoch_gregorian_seconds() | |
| , Now + EpochSecs | |
| . | |
| gregorian_seconds_to_epoch(Secs) -> | |
| EpochSecs = epoch_gregorian_seconds() | |
| , Secs - EpochSecs | |
| . | |
| date_to_epoch(Date) -> | |
| datetime_to_epoch({Date, {0,0,0} }) | |
| . | |
| datetime_to_epoch({Date, Time}) -> | |
| gregorian_seconds_to_epoch( | |
| calendar:datetime_to_gregorian_seconds({Date, Time})) | |
| . | |
| is_older_by(T1, T2, {days, N}) -> | |
| N1 = day_difference(T1, T2) | |
| , case N1 of | |
| N2 when (-N < N2) -> | |
| true; | |
| _ -> | |
| false | |
| end | |
| . | |
| is_sooner_by(T1, T2, {days, N}) -> | |
| case day_difference(T1, T2) of | |
| N1 when N > N1 -> | |
| true; | |
| _ -> | |
| false | |
| end | |
| . | |
| is_time_older_than({Date, Time}, Mark) -> | |
| is_time_older_than(calendar:datetime_to_gregorian_seconds({Date, Time}) | |
| , Mark); | |
| is_time_older_than(Time, {DateMark, TimeMark}) -> | |
| is_time_older_than(Time | |
| , calendar:datetime_to_gregorian_seconds({DateMark, TimeMark})); | |
| is_time_older_than(Time, Mark) when is_integer(Time), is_integer(Mark) -> | |
| Time < Mark | |
| . | |
| day_difference({D1, _}, D2) -> | |
| day_difference(D1, D2); | |
| day_difference(D1, {D2, _}) -> | |
| day_difference(D1, D2); | |
| day_difference(D1, D2) -> | |
| Days1 = calendar:date_to_gregorian_days(D1) | |
| , Days2 = calendar:date_to_gregorian_days(D2) | |
| , Days1 - Days2 | |
| . | |
| is_time_sooner_than({Date, Time}, Mark) -> | |
| is_time_sooner_than(calendar:datetime_to_gregorian_seconds({Date, Time}) | |
| , Mark); | |
| is_time_sooner_than(Time, {DateMark, TimeMark}) -> | |
| is_time_sooner_than(Time | |
| , calendar:datetime_to_gregorian_seconds({DateMark, TimeMark})); | |
| is_time_sooner_than(Time, Mark) when is_integer(Time), is_integer(Mark) -> | |
| Time > Mark | |
| . | |
| subtract(Date, {days, N}) -> | |
| New = calendar:date_to_gregorian_days(Date) - N | |
| , calendar:gregorian_days_to_date(New) | |
| . | |
| add(Date, {days, N}) -> | |
| New = calendar:date_to_gregorian_days(Date) + N | |
| , calendar:gregorian_days_to_date(New) | |
| . |
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