Rewrite the function that converts timestamp to year, month and day in C++.
Review URL: http://codereview.chromium.org/811006 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4115 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
oleg@chromium.org
parent
4e5d347644
commit
5f75b01bb1
@ -293,55 +293,48 @@ function CalculateDateTable() {
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}
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// Constructor for creating objects holding year, month, and date.
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// Introduced to ensure the two return points in FromJulianDay match same map.
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function DayTriplet(year, month, date) {
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this.year = year;
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this.month = month;
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this.date = date;
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var ymd_from_time_cache = [$NaN, $NaN, $NaN];
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var ymd_from_time_cached_time = $NaN;
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function YearFromTime(t) {
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if (t !== ymd_from_time_cached_time) {
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// Limits according to ECMA 262 15.9.1.1
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if (!$isFinite(t) || t < -8640000000000000 || t > 8640000000000000) {
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return $NaN;
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}
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%DateYMDFromTime(t, ymd_from_time_cache);
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ymd_from_time_cached_time = t
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}
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return ymd_from_time_cache[0];
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}
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var julian_day_cache_triplet;
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var julian_day_cache_day = $NaN;
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function MonthFromTime(t) {
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if (t !== ymd_from_time_cached_time) {
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// Limits according to ECMA 262 15.9.1.1
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if (!$isFinite(t) || t < -8640000000000000 || t > 8640000000000000) {
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return $NaN;
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}
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%DateYMDFromTime(t, ymd_from_time_cache);
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ymd_from_time_cached_time = t
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}
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// Compute year, month, and day from modified Julian day.
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// The missing days in 1582 are ignored for JavaScript compatibility.
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function FromJulianDay(julian) {
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if (julian_day_cache_day == julian) {
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return julian_day_cache_triplet;
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return ymd_from_time_cache[1];
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}
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function DateFromTime(t) {
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if (t !== ymd_from_time_cached_time) {
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// Limits according to ECMA 262 15.9.1.1
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if (!$isFinite(t) || t < -8640000000000000 || t > 8640000000000000) {
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return $NaN;
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}
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%DateYMDFromTime(t, ymd_from_time_cache);
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ymd_from_time_cached_time = t
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}
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var result;
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// Avoid floating point and non-Smi maths in common case. This is also a period of
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// time where leap years are very regular. The range is not too large to avoid overflow
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// when doing the multiply-to-divide trick.
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if (julian > kDayZeroInJulianDay &&
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(julian - kDayZeroInJulianDay) < 40177) { // 1970 - 2080
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var jsimple = (julian - kDayZeroInJulianDay) + 731; // Day 0 is 1st January 1968
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var y = 1968;
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// Divide by 1461 by multiplying with 22967 and shifting down by 25!
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var after_1968 = (jsimple * 22967) >> 25;
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y += after_1968 << 2;
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jsimple -= 1461 * after_1968;
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var four_year_cycle = four_year_cycle_table[jsimple];
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result = new DayTriplet(y + (four_year_cycle >> kYearShift),
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(four_year_cycle & kMonthMask) >> kMonthShift,
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four_year_cycle & kDayMask);
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} else {
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var jalpha = FLOOR((julian - 1867216.25) / 36524.25);
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var jb = julian + 1 + jalpha - FLOOR(0.25 * jalpha) + 1524;
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var jc = FLOOR(6680.0 + ((jb-2439870) - 122.1)/365.25);
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var jd = FLOOR(365 * jc + (0.25 * jc));
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var je = FLOOR((jb - jd)/30.6001);
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var m = je - 1;
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if (m > 12) m -= 13;
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var y = jc - 4715;
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if (m > 2) { --y; --m; }
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var d = jb - jd - FLOOR(30.6001 * je);
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result = new DayTriplet(y, m, d);
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}
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julian_day_cache_day = julian;
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julian_day_cache_triplet = result;
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return result;
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return ymd_from_time_cache[2];
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}
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@ -577,11 +570,10 @@ function TwoDigitString(value) {
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function DateString(time) {
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var YMD = FromJulianDay(DAY(time) + kDayZeroInJulianDay);
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return WeekDays[WeekDay(time)] + ' '
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+ Months[YMD.month] + ' '
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+ TwoDigitString(YMD.date) + ' '
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+ YMD.year;
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+ Months[MonthFromTime(time)] + ' '
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+ TwoDigitString(DateFromTime(time)) + ' '
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+ YearFromTime(time);
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}
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@ -590,11 +582,10 @@ var LongMonths = ['January', 'February', 'March', 'April', 'May', 'June', 'July'
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function LongDateString(time) {
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var YMD = FromJulianDay(DAY(time) + kDayZeroInJulianDay);
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return LongWeekDays[WeekDay(time)] + ', '
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+ LongMonths[YMD.month] + ' '
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+ TwoDigitString(YMD.date) + ', '
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+ YMD.year;
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+ LongMonths[MonthFromTime(time)] + ' '
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+ TwoDigitString(DateFromTime(time)) + ', '
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+ YearFromTime(time);
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}
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@ -136,9 +136,9 @@ macro NUMBER_OF_CAPTURES(array) = ((array)[0]);
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# a type error is thrown.
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macro DATE_VALUE(arg) = (%_ClassOf(arg) === 'Date' ? %_ValueOf(arg) : ThrowDateTypeError());
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macro DAY(time) = ($floor(time / 86400000));
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macro MONTH_FROM_TIME(time) = (FromJulianDay(($floor(time / 86400000)) + 2440588).month);
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macro DATE_FROM_TIME(time) = (FromJulianDay(($floor(time / 86400000)) + 2440588).date);
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macro YEAR_FROM_TIME(time) = (FromJulianDay(($floor(time / 86400000)) + 2440588).year);
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macro MONTH_FROM_TIME(time) = (MonthFromTime(time));
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macro DATE_FROM_TIME(time) = (DateFromTime(time));
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macro YEAR_FROM_TIME(time) = (YearFromTime(time));
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macro HOUR_FROM_TIME(time) = (Modulo($floor(time / 3600000), 24));
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macro MIN_FROM_TIME(time) = (Modulo($floor(time / 60000), 60));
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macro SEC_FROM_TIME(time) = (Modulo($floor(time / 1000), 60));
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332
src/runtime.cc
332
src/runtime.cc
@ -5128,14 +5128,7 @@ static Object* Runtime_Math_tan(Arguments args) {
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}
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static Object* Runtime_DateMakeDay(Arguments args) {
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NoHandleAllocation ha;
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ASSERT(args.length() == 3);
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CONVERT_SMI_CHECKED(year, args[0]);
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CONVERT_SMI_CHECKED(month, args[1]);
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CONVERT_SMI_CHECKED(date, args[2]);
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static int MakeDay(int year, int month, int day) {
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static const int day_from_month[] = {0, 31, 59, 90, 120, 151,
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181, 212, 243, 273, 304, 334};
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static const int day_from_month_leap[] = {0, 31, 60, 91, 121, 152,
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@ -5157,7 +5150,7 @@ static Object* Runtime_DateMakeDay(Arguments args) {
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// ECMA 262 - 15.9.1.1, i.e. upto 100,000,000 days on either side of
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// Jan 1 1970. This is required so that we don't run into integer
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// division of negative numbers.
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// c) there shouldn't be overflow for 32-bit integers in the following
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// c) there shouldn't be an overflow for 32-bit integers in the following
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// operations.
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static const int year_delta = 399999;
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static const int base_day = 365 * (1970 + year_delta) +
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@ -5173,10 +5166,327 @@ static Object* Runtime_DateMakeDay(Arguments args) {
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base_day;
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if (year % 4 || (year % 100 == 0 && year % 400 != 0)) {
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return Smi::FromInt(day_from_year + day_from_month[month] + date - 1);
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return day_from_year + day_from_month[month] + day - 1;
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}
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return Smi::FromInt(day_from_year + day_from_month_leap[month] + date - 1);
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return day_from_year + day_from_month_leap[month] + day - 1;
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}
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static Object* Runtime_DateMakeDay(Arguments args) {
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NoHandleAllocation ha;
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ASSERT(args.length() == 3);
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CONVERT_SMI_CHECKED(year, args[0]);
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CONVERT_SMI_CHECKED(month, args[1]);
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CONVERT_SMI_CHECKED(date, args[2]);
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return Smi::FromInt(MakeDay(year, month, date));
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}
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static const int kDays4Years[] = {0, 365, 2 * 365, 3 * 365 + 1};
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static const int kDaysIn4Years = 4 * 365 + 1;
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static const int kDaysIn100Years = 25 * kDaysIn4Years - 1;
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static const int kDaysIn400Years = 4 * kDaysIn100Years + 1;
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static const int kDays1970to2000 = 30 * 365 + 7;
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static const int kDaysOffset = 1000 * kDaysIn400Years + 5 * kDaysIn400Years -
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kDays1970to2000;
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static const int kYearsOffset = 400000;
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static const char kDayInYear[] = {
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31};
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static const char kMonthInYear[] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1,
|
||||
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
|
||||
2, 2, 2, 2, 2, 2,
|
||||
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
|
||||
3, 3, 3, 3, 3,
|
||||
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
|
||||
4, 4, 4, 4, 4, 4,
|
||||
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
|
||||
5, 5, 5, 5, 5,
|
||||
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
|
||||
6, 6, 6, 6, 6, 6,
|
||||
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
|
||||
7, 7, 7, 7, 7, 7,
|
||||
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||||
8, 8, 8, 8, 8,
|
||||
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
|
||||
9, 9, 9, 9, 9, 9,
|
||||
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
|
||||
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
|
||||
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
|
||||
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
|
||||
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||
0, 0, 0, 0, 0, 0,
|
||||
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
||||
1, 1, 1,
|
||||
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
|
||||
2, 2, 2, 2, 2, 2,
|
||||
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
|
||||
3, 3, 3, 3, 3,
|
||||
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
|
||||
4, 4, 4, 4, 4, 4,
|
||||
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
|
||||
5, 5, 5, 5, 5,
|
||||
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
|
||||
6, 6, 6, 6, 6, 6,
|
||||
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
|
||||
7, 7, 7, 7, 7, 7,
|
||||
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||||
8, 8, 8, 8, 8,
|
||||
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
|
||||
9, 9, 9, 9, 9, 9,
|
||||
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
|
||||
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
|
||||
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
|
||||
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
|
||||
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||
0, 0, 0, 0, 0, 0,
|
||||
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
||||
1, 1, 1, 1,
|
||||
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
|
||||
2, 2, 2, 2, 2, 2,
|
||||
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
|
||||
3, 3, 3, 3, 3,
|
||||
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
|
||||
4, 4, 4, 4, 4, 4,
|
||||
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
|
||||
5, 5, 5, 5, 5,
|
||||
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
|
||||
6, 6, 6, 6, 6, 6,
|
||||
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
|
||||
7, 7, 7, 7, 7, 7,
|
||||
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||||
8, 8, 8, 8, 8,
|
||||
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
|
||||
9, 9, 9, 9, 9, 9,
|
||||
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
|
||||
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
|
||||
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
|
||||
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
|
||||
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||
0, 0, 0, 0, 0, 0,
|
||||
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
||||
1, 1, 1,
|
||||
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
|
||||
2, 2, 2, 2, 2, 2,
|
||||
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
|
||||
3, 3, 3, 3, 3,
|
||||
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
|
||||
4, 4, 4, 4, 4, 4,
|
||||
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
|
||||
5, 5, 5, 5, 5,
|
||||
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
|
||||
6, 6, 6, 6, 6, 6,
|
||||
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
|
||||
7, 7, 7, 7, 7, 7,
|
||||
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||||
8, 8, 8, 8, 8,
|
||||
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
|
||||
9, 9, 9, 9, 9, 9,
|
||||
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
|
||||
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
|
||||
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
|
||||
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11};
|
||||
|
||||
|
||||
// This function works for dates from 1970 to 2099.
|
||||
static inline void DateYMDFromTimeAfter1970(int date,
|
||||
int &year, int &month, int &day) {
|
||||
#ifdef DEBUG
|
||||
int save_date = date; // Need this for ASSERT in the end.
|
||||
#endif
|
||||
|
||||
year = 1970 + (4 * date + 2) / kDaysIn4Years;
|
||||
date %= kDaysIn4Years;
|
||||
|
||||
month = kMonthInYear[date];
|
||||
day = kDayInYear[date];
|
||||
|
||||
ASSERT(MakeDay(year, month, day) == save_date);
|
||||
}
|
||||
|
||||
|
||||
static inline void DateYMDFromTimeSlow(int date,
|
||||
int &year, int &month, int &day) {
|
||||
#ifdef DEBUG
|
||||
int save_date = date; // Need this for ASSERT in the end.
|
||||
#endif
|
||||
|
||||
date += kDaysOffset;
|
||||
year = 400 * (date / kDaysIn400Years) - kYearsOffset;
|
||||
date %= kDaysIn400Years;
|
||||
|
||||
ASSERT(MakeDay(year, 0, 1) + date == save_date);
|
||||
|
||||
date--;
|
||||
int yd1 = date / kDaysIn100Years;
|
||||
date %= kDaysIn100Years;
|
||||
year += 100 * yd1;
|
||||
|
||||
date++;
|
||||
int yd2 = date / kDaysIn4Years;
|
||||
date %= kDaysIn4Years;
|
||||
year += 4 * yd2;
|
||||
|
||||
date--;
|
||||
int yd3 = date / 365;
|
||||
date %= 365;
|
||||
year += yd3;
|
||||
|
||||
bool is_leap = (!yd1 || yd2) && !yd3;
|
||||
|
||||
ASSERT(date >= -1);
|
||||
ASSERT(is_leap || date >= 0);
|
||||
ASSERT(date < 365 || is_leap && date < 366);
|
||||
ASSERT(is_leap == (year % 4 == 0 && (year % 100 || (year % 400 == 0))));
|
||||
ASSERT(is_leap || MakeDay(year, 0, 1) + date == save_date);
|
||||
ASSERT(!is_leap || MakeDay(year, 0, 1) + date + 1 == save_date);
|
||||
|
||||
if (is_leap) {
|
||||
day = kDayInYear[2*365 + 1 + date];
|
||||
month = kMonthInYear[2*365 + 1 + date];
|
||||
} else {
|
||||
day = kDayInYear[date];
|
||||
month = kMonthInYear[date];
|
||||
}
|
||||
|
||||
ASSERT(MakeDay(year, month, day) == save_date);
|
||||
}
|
||||
|
||||
|
||||
static inline void DateYMDFromTime(int date,
|
||||
int &year, int &month, int &day) {
|
||||
if (date >= 0 && date < 32 * kDaysIn4Years) {
|
||||
DateYMDFromTimeAfter1970(date, year, month, day);
|
||||
} else {
|
||||
DateYMDFromTimeSlow(date, year, month, day);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static Object* Runtime_DateYMDFromTime(Arguments args) {
|
||||
NoHandleAllocation ha;
|
||||
ASSERT(args.length() == 2);
|
||||
|
||||
CONVERT_DOUBLE_CHECKED(t, args[0]);
|
||||
CONVERT_CHECKED(JSArray, res_array, args[1]);
|
||||
|
||||
int year, month, day;
|
||||
DateYMDFromTime(static_cast<int>(floor(t / 86400000)), year, month, day);
|
||||
|
||||
res_array->SetElement(0, Smi::FromInt(year));
|
||||
res_array->SetElement(1, Smi::FromInt(month));
|
||||
res_array->SetElement(2, Smi::FromInt(day));
|
||||
|
||||
return Heap::undefined_value();
|
||||
}
|
||||
|
||||
|
||||
|
||||
@ -204,6 +204,7 @@ namespace internal {
|
||||
F(DateLocalTimeOffset, 0, 1) \
|
||||
F(DateDaylightSavingsOffset, 1, 1) \
|
||||
F(DateMakeDay, 3, 1) \
|
||||
F(DateYMDFromTime, 2, 1) \
|
||||
\
|
||||
/* Numbers */ \
|
||||
F(NumberIsFinite, 1, 1) \
|
||||
|
||||
Loading…
Reference in New Issue
Block a user