IfcLeapYear

Definition from ISO/CD 10303-41:1992: Determines whether a given year is a leap year or not according to the Gregorian Calender algorithm. It returns TRUE if the year is a leap year, otherwise it returns FALSE.

NOTE Corresponding STEP name: leap_year, please refer to ISO/IS 10303-41:1994 for the final definition of the formal standard.

HISTORY New function in IFC Release 1.5.1.

EXPRESS specification:

FUNCTION IfcLeapYear

(Year : IfcYearNumber)
      :BOOLEAN;

IF ((((Year MOD 4) = 0) AND ((Year MOD 100) <> 0)) OR
            ((Year MOD 400) = 0)) THEN
  RETURN(TRUE);
ELSE
  RETURN(FALSE);
END_IF;

END_FUNCTION;