95 #define kJan1_1JulianDay  1721426 // January 1, year 1 (Gregorian)
140      * Return TRUE if the given year is a leap year.
141      * @param year Gregorian year, with 0 == 1 BCE, -1 == 2 BCE, etc.
142      * @return TRUE if the year is a leap year
144     static inline UBool isLeapYear(int32_t year);
148      * @param year Gregorian year, with 0 == 1 BCE, -1 == 2 BCE, etc.
152     static inline int8_t monthLength(int32_t year, int32_t month);
156      * @param y the extended year
163      * Convert a year, month, and day-of-month, given in the proleptic
165      * @param year Gregorian year, with 0 == 1 BCE, -1 == 2 BCE, etc.
170     static double fieldsToDay(int32_t year, int32_t month, int32_t dom);
173      * Convert a 1970-epoch day number to proleptic Gregorian year,
176      * @param year output parameter to receive year
180      * @param doy output parameter to receive day-of-year (1-based)
182     static void dayToFields(double day, int32_t& year, int32_t& month,
186      * Convert a 1970-epoch day number to proleptic Gregorian year,
189      * @param year output parameter to receive year
194     static inline void dayToFields(double day, int32_t& year, int32_t& month,
198      * Convert a 1970-epoch milliseconds to proleptic Gregorian year,
199      * month, day-of-month, and day-of-week, day of year and millis-in-day.
201      * @param year output parameter to receive year
205      * @param doy output parameter to receive day-of-year (1-based)
208     static void timeToFields(UDate time, int32_t& year, int32_t& month,
221      * @param year Gregorian year, with 0 == 1 BCE, -1 == 2 BCE, etc.
226     static int32_t dayOfWeekInMonth(int32_t year, int32_t month, int32_t dom);
245      * Calculates the Gregorian day shift value for an extended year.
246      * @param eyear Extended year 
260 inline UBool Grego::isLeapYear(int32_t year) {  in isLeapYear()  argument
261     // year&0x3 == year%4  in isLeapYear()
262     return ((year&0x3) == 0) && ((year%100 != 0) || (year%400 == 0));  in isLeapYear()
266 Grego::monthLength(int32_t year, int32_t month) {  in monthLength()  argument
267     return MONTH_LENGTH[month + (isLeapYear(year) ? 12 : 0)];  in monthLength()
275 inline void Grego::dayToFields(double day, int32_t& year, int32_t& month,  in dayToFields()  argument
278   dayToFields(day,year,month,dom,dow,doy_unused);  in dayToFields()