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------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- A D A . C A L E N D A R . F O R M A T T I N G -- -- -- -- S p e c -- -- -- -- Copyright (C) 2005-2008, Free Software Foundation, Inc. -- -- -- -- This specification is derived from the Ada Reference Manual for use with -- -- GNAT. In accordance with the copyright of that document, you can freely -- -- copy and modify this specification, provided that if you redistribute a -- -- modified version, any changes that you have made are clearly indicated. -- -- -- ------------------------------------------------------------------------------ -- This package provides additional components to Time, as well as new -- Time_Of and Split routines which handle time zones and leap seconds. -- This package is defined in the Ada 2005 RM (9.6.1). with Ada.Calendar.Time_Zones; package Ada.Calendar.Formatting is -- Day of the week type Day_Name is (Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday); function Day_Of_Week (Date : Time) return Day_Name; -- Hours:Minutes:Seconds access subtype Hour_Number is Natural range 0 .. 23; subtype Minute_Number is Natural range 0 .. 59; subtype Second_Number is Natural range 0 .. 59; subtype Second_Duration is Day_Duration range 0.0 .. 1.0; function Year (Date : Time; Time_Zone : Time_Zones.Time_Offset := 0) return Year_Number; function Month (Date : Time; Time_Zone : Time_Zones.Time_Offset := 0) return Month_Number; function Day (Date : Time; Time_Zone : Time_Zones.Time_Offset := 0) return Day_Number; function Hour (Date : Time; Time_Zone : Time_Zones.Time_Offset := 0) return Hour_Number; function Minute (Date : Time; Time_Zone : Time_Zones.Time_Offset := 0) return Minute_Number; function Second (Date : Time) return Second_Number; function Sub_Second (Date : Time) return Second_Duration; function Seconds_Of (Hour : Hour_Number; Minute : Minute_Number; Second : Second_Number := 0; Sub_Second : Second_Duration := 0.0) return Day_Duration; -- Returns a Day_Duration value for the combination of the given Hour, -- Minute, Second, and Sub_Second. This value can be used in Ada.Calendar. -- Time_Of as well as the argument to Calendar."+" and Calendar."–". If -- Seconds_Of is called with a Sub_Second value of 1.0, the value returned -- is equal to the value of Seconds_Of for the next second with a Sub_ -- Second value of 0.0. procedure Split (Seconds : Day_Duration; Hour : out Hour_Number; Minute : out Minute_Number; Second : out Second_Number; Sub_Second : out Second_Duration); -- Splits Seconds into Hour, Minute, Second and Sub_Second in such a way -- that the resulting values all belong to their respective subtypes. The -- value returned in the Sub_Second parameter is always less than 1.0. procedure Split (Date : Time; Year : out Year_Number; Month : out Month_Number; Day : out Day_Number; Hour : out Hour_Number; Minute : out Minute_Number; Second : out Second_Number; Sub_Second : out Second_Duration; Time_Zone : Time_Zones.Time_Offset := 0); -- Splits Date into its constituent parts (Year, Month, Day, Hour, Minute, -- Second, Sub_Second), relative to the specified time zone offset. The -- value returned in the Sub_Second parameter is always less than 1.0. function Time_Of (Year : Year_Number; Month : Month_Number; Day : Day_Number; Hour : Hour_Number; Minute : Minute_Number; Second : Second_Number; Sub_Second : Second_Duration := 0.0; Leap_Second : Boolean := False; Time_Zone : Time_Zones.Time_Offset := 0) return Time; -- If Leap_Second is False, returns a Time built from the date and time -- values, relative to the specified time zone offset. If Leap_Second is -- True, returns the Time that represents the time within the leap second -- that is one second later than the time specified by the parameters. -- Time_Error is raised if the parameters do not form a proper date or -- time. If Time_Of is called with a Sub_Second value of 1.0, the value -- returned is equal to the value of Time_Of for the next second with a -- Sub_Second value of 0.0. function Time_Of (Year : Year_Number; Month : Month_Number; Day : Day_Number; Seconds : Day_Duration := 0.0; Leap_Second : Boolean := False; Time_Zone : Time_Zones.Time_Offset := 0) return Time; -- If Leap_Second is False, returns a Time built from the date and time -- values, relative to the specified time zone offset. If Leap_Second is -- True, returns the Time that represents the time within the leap second -- that is one second later than the time specified by the parameters. -- Time_Error is raised if the parameters do not form a proper date or -- time. If Time_Of is called with a Seconds value of 86_400.0, the value -- returned is equal to the value of Time_Of for the next day with a -- Seconds value of 0.0. procedure Split (Date : Time; Year : out Year_Number; Month : out Month_Number; Day : out Day_Number; Hour : out Hour_Number; Minute : out Minute_Number; Second : out Second_Number; Sub_Second : out Second_Duration; Leap_Second : out Boolean; Time_Zone : Time_Zones.Time_Offset := 0); -- If Date does not represent a time within a leap second, splits Date -- into its constituent parts (Year, Month, Day, Hour, Minute, Second, -- Sub_Second), relative to the specified time zone offset, and sets -- Leap_Second to False. If Date represents a time within a leap second, -- set the constituent parts to values corresponding to a time one second -- earlier than that given by Date, relative to the specified time zone -- offset, and sets Leap_Seconds to True. The value returned in the -- Sub_Second parameter is always less than 1.0. procedure Split (Date : Time; Year : out Year_Number; Month : out Month_Number; Day : out Day_Number; Seconds : out Day_Duration; Leap_Second : out Boolean; Time_Zone : Time_Zones.Time_Offset := 0); -- If Date does not represent a time within a leap second, splits Date -- into its constituent parts (Year, Month, Day, Seconds), relative to the -- specified time zone offset, and sets Leap_Second to False. If Date -- represents a time within a leap second, set the constituent parts to -- values corresponding to a time one second earlier than that given by -- Date, relative to the specified time zone offset, and sets Leap_Seconds -- to True. The value returned in the Seconds parameter is always less -- than 86_400.0. -- Simple image and value function Image (Date : Time; Include_Time_Fraction : Boolean := False; Time_Zone : Time_Zones.Time_Offset := 0) return String; -- Returns a string form of the Date relative to the given Time_Zone. The -- format is "Year-Month-Day Hour:Minute:Second", where the Year is a -- 4-digit value, and all others are 2-digit values, of the functions -- defined in Ada.Calendar and Ada.Calendar.Formatting, including a -- leading zero, if needed. The separators between the values are a minus, -- another minus, a colon, and a single space between the Day and Hour. If -- Include_Time_Fraction is True, the integer part of Sub_Seconds*100 is -- suffixed to the string as a point followed by a 2-digit value. function Value (Date : String; Time_Zone : Time_Zones.Time_Offset := 0) return Time; -- Returns a Time value for the image given as Date, relative to the given -- time zone. Constraint_Error is raised if the string is not formatted as -- described for Image, or the function cannot interpret the given string -- as a Time value. function Image (Elapsed_Time : Duration; Include_Time_Fraction : Boolean := False) return String; -- Returns a string form of the Elapsed_Time. The format is "Hour:Minute: -- Second", where all values are 2-digit values, including a leading zero, -- if needed. The separators between the values are colons. If Include_ -- Time_Fraction is True, the integer part of Sub_Seconds*100 is suffixed -- to the string as a point followed by a 2-digit value. If Elapsed_Time < -- 0.0, the result is Image (abs Elapsed_Time, Include_Time_Fraction) -- prefixed with a minus sign. If abs Elapsed_Time represents 100 hours or -- more, the result is implementation-defined. function Value (Elapsed_Time : String) return Duration; -- Returns a Duration value for the image given as Elapsed_Time. -- Constraint_Error is raised if the string is not formatted as described -- for Image, or the function cannot interpret the given string as a -- Duration value. end Ada.Calendar.Formatting;