diff options
Diffstat (limited to 'lib/stdlib/src/calendar.erl')
| -rw-r--r-- | lib/stdlib/src/calendar.erl | 78 |
1 files changed, 37 insertions, 41 deletions
diff --git a/lib/stdlib/src/calendar.erl b/lib/stdlib/src/calendar.erl index 8d1071209e..0320e0cd0e 100644 --- a/lib/stdlib/src/calendar.erl +++ b/lib/stdlib/src/calendar.erl @@ -63,7 +63,7 @@ %% Types %%---------------------------------------------------------------------- --export_type([t_now/0]). +-export_type([date/0, time/0, datetime/0, datetime1970/0]). -type year() :: non_neg_integer(). -type year1970() :: 1970..10000. % should probably be 1970.. @@ -76,15 +76,11 @@ -type ldom() :: 28 | 29 | 30 | 31. % last day of month -type weeknum() :: 1..53. --type t_now() :: {MegaSecs :: non_neg_integer(), - Secs :: non_neg_integer(), - MicroSecs :: non_neg_integer()}. - --type t_date() :: {year(),month(),day()}. --type t_time() :: {hour(),minute(),second()}. --type t_datetime() :: {t_date(),t_time()}. --type t_datetime1970() :: {{year1970(),month(),day()},t_time()}. --type t_yearweeknum() :: {year(),weeknum()}. +-type date() :: {year(),month(),day()}. +-type time() :: {hour(),minute(),second()}. +-type datetime() :: {date(),time()}. +-type datetime1970() :: {{year1970(),month(),day()},time()}. +-type yearweeknum() :: {year(),weeknum()}. %%---------------------------------------------------------------------- @@ -123,7 +119,7 @@ date_to_gregorian_days(Year, Month, Day) when is_integer(Day), Day > 0 -> end. -spec date_to_gregorian_days(Date) -> Days when - Date :: t_date(), + Date :: date(), Days :: non_neg_integer(). date_to_gregorian_days({Year, Month, Day}) -> date_to_gregorian_days(Year, Month, Day). @@ -135,7 +131,7 @@ date_to_gregorian_days({Year, Month, Day}) -> %% January 1st. %% -spec datetime_to_gregorian_seconds(DateTime) -> Seconds when - DateTime :: t_datetime(), + DateTime :: datetime(), Seconds :: non_neg_integer(). datetime_to_gregorian_seconds({Date, Time}) -> ?SECONDS_PER_DAY*date_to_gregorian_days(Date) + @@ -155,14 +151,14 @@ day_of_the_week(Year, Month, Day) -> (date_to_gregorian_days(Year, Month, Day) + 5) rem 7 + 1. -spec day_of_the_week(Date) -> daynum() when - Date:: t_date(). + Date:: date(). day_of_the_week({Year, Month, Day}) -> day_of_the_week(Year, Month, Day). %% gregorian_days_to_date(Days) = {Year, Month, Day} %% --spec gregorian_days_to_date(Days) -> t_date() when +-spec gregorian_days_to_date(Days) -> date() when Days :: non_neg_integer(). gregorian_days_to_date(Days) -> {Year, DayOfYear} = day_to_year(Days), @@ -172,7 +168,7 @@ gregorian_days_to_date(Days) -> %% gregorian_seconds_to_datetime(Secs) %% --spec gregorian_seconds_to_datetime(Seconds) -> t_datetime() when +-spec gregorian_seconds_to_datetime(Seconds) -> datetime() when Seconds :: non_neg_integer(). gregorian_seconds_to_datetime(Secs) when Secs >= 0 -> Days = Secs div ?SECONDS_PER_DAY, @@ -198,7 +194,7 @@ is_leap_year1(_) -> false. %% %% Calculates the iso week number for the current date. %% --spec iso_week_number() -> t_yearweeknum(). +-spec iso_week_number() -> yearweeknum(). iso_week_number() -> {Date, _} = local_time(), iso_week_number(Date). @@ -207,8 +203,8 @@ iso_week_number() -> %% %% Calculates the iso week number for the given date. %% --spec iso_week_number(Date) -> t_yearweeknum() when - Date :: t_date(). +-spec iso_week_number(Date) -> yearweeknum() when + Date :: date(). iso_week_number({Year, Month, Day}) -> D = date_to_gregorian_days({Year, Month, Day}), W01_1_Year = gregorian_days_of_iso_w01_1(Year), @@ -260,7 +256,7 @@ last_day_of_the_month1(_, M) when is_integer(M), M > 0, M < 13 -> %% local_time() %% %% Returns: {date(), time()}, date() = {Y, M, D}, time() = {H, M, S}. --spec local_time() -> t_datetime(). +-spec local_time() -> datetime(). local_time() -> erlang:localtime(). @@ -268,20 +264,20 @@ local_time() -> %% local_time_to_universal_time(DateTime) %% -spec local_time_to_universal_time(DateTime1) -> DateTime2 when - DateTime1 :: t_datetime1970(), - DateTime2 :: t_datetime1970(). + DateTime1 :: datetime1970(), + DateTime2 :: datetime1970(). local_time_to_universal_time(DateTime) -> erlang:localtime_to_universaltime(DateTime). --spec local_time_to_universal_time(t_datetime1970(), +-spec local_time_to_universal_time(datetime1970(), 'true' | 'false' | 'undefined') -> - t_datetime1970(). + datetime1970(). local_time_to_universal_time(DateTime, IsDst) -> erlang:localtime_to_universaltime(DateTime, IsDst). -spec local_time_to_universal_time_dst(DateTime1) -> [DateTime] when - DateTime1 :: t_datetime1970(), - DateTime :: t_datetime1970(). + DateTime1 :: datetime1970(), + DateTime :: datetime1970(). local_time_to_universal_time_dst(DateTime) -> UtDst = erlang:localtime_to_universaltime(DateTime, true), Ut = erlang:localtime_to_universaltime(DateTime, false), @@ -309,14 +305,14 @@ local_time_to_universal_time_dst(DateTime) -> %% = MilliSec = integer() %% Returns: {date(), time()}, date() = {Y, M, D}, time() = {H, M, S}. %% --spec now_to_datetime(Now) -> t_datetime1970() when - Now :: t_now(). +-spec now_to_datetime(Now) -> datetime1970() when + Now :: erlang:timestamp(). now_to_datetime({MSec, Sec, _uSec}) -> Sec0 = MSec*1000000 + Sec + ?DAYS_FROM_0_TO_1970*?SECONDS_PER_DAY, gregorian_seconds_to_datetime(Sec0). --spec now_to_universal_time(Now) -> t_datetime1970() when - Now :: t_now(). +-spec now_to_universal_time(Now) -> datetime1970() when + Now :: erlang:timestamp(). now_to_universal_time(Now) -> now_to_datetime(Now). @@ -325,8 +321,8 @@ now_to_universal_time(Now) -> %% %% Args: Now = now() %% --spec now_to_local_time(Now) -> t_datetime1970() when - Now :: t_now(). +-spec now_to_local_time(Now) -> datetime1970() when + Now :: erlang:timestamp(). now_to_local_time({MSec, Sec, _uSec}) -> erlang:universaltime_to_localtime( now_to_universal_time({MSec, Sec, _uSec})). @@ -338,7 +334,7 @@ now_to_local_time({MSec, Sec, _uSec}) -> -spec seconds_to_daystime(Seconds) -> {Days, Time} when Seconds :: integer(), Days :: integer(), - Time :: t_time(). + Time :: time(). seconds_to_daystime(Secs) -> Days0 = Secs div ?SECONDS_PER_DAY, Secs0 = Secs rem ?SECONDS_PER_DAY, @@ -356,7 +352,7 @@ seconds_to_daystime(Secs) -> %% Wraps. %% -type secs_per_day() :: 0..?SECONDS_PER_DAY. --spec seconds_to_time(Seconds) -> t_time() when +-spec seconds_to_time(Seconds) -> time() when Seconds :: secs_per_day(). seconds_to_time(Secs) when Secs >= 0, Secs < ?SECONDS_PER_DAY -> Secs0 = Secs rem ?SECONDS_PER_DAY, @@ -375,10 +371,10 @@ seconds_to_time(Secs) when Secs >= 0, Secs < ?SECONDS_PER_DAY -> %% Year = Month = Day = Hour = Minute = Sec = integer() %% -spec time_difference(T1, T2) -> {Days, Time} when - T1 :: t_datetime(), - T2 :: t_datetime(), + T1 :: datetime(), + T2 :: datetime(), Days :: integer(), - Time :: t_time(). + Time :: time(). time_difference({{Y1, Mo1, D1}, {H1, Mi1, S1}}, {{Y2, Mo2, D2}, {H2, Mi2, S2}}) -> Secs = datetime_to_gregorian_seconds({{Y2, Mo2, D2}, {H2, Mi2, S2}}) - @@ -390,7 +386,7 @@ time_difference({{Y1, Mo1, D1}, {H1, Mi1, S1}}, %% time_to_seconds(Time) %% -spec time_to_seconds(Time) -> secs_per_day() when - Time :: t_time(). + Time :: time(). time_to_seconds({H, M, S}) when is_integer(H), is_integer(M), is_integer(S) -> H * ?SECONDS_PER_HOUR + M * ?SECONDS_PER_MINUTE + S. @@ -399,15 +395,15 @@ time_to_seconds({H, M, S}) when is_integer(H), is_integer(M), is_integer(S) -> %% universal_time() %% %% Returns: {date(), time()}, date() = {Y, M, D}, time() = {H, M, S}. --spec universal_time() -> t_datetime(). +-spec universal_time() -> datetime(). universal_time() -> erlang:universaltime(). %% universal_time_to_local_time(DateTime) %% --spec universal_time_to_local_time(DateTime) -> t_datetime() when - DateTime :: t_datetime1970(). +-spec universal_time_to_local_time(DateTime) -> datetime() when + DateTime :: datetime1970(). universal_time_to_local_time(DateTime) -> erlang:universaltime_to_localtime(DateTime). @@ -429,7 +425,7 @@ valid_date1(_, _, _) -> false. -spec valid_date(Date) -> boolean() when - Date :: t_date(). + Date :: date(). valid_date({Y, M, D}) -> valid_date(Y, M, D). |