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Diffstat (limited to 'deps/v8/src/date.js')
| -rw-r--r-- | deps/v8/src/date.js | 1090 |
1 files changed, 1090 insertions, 0 deletions
diff --git a/deps/v8/src/date.js b/deps/v8/src/date.js new file mode 100644 index 0000000000..c7c39406fa --- /dev/null +++ b/deps/v8/src/date.js @@ -0,0 +1,1090 @@ +// Copyright 2006-2008 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + +// This file relies on the fact that the following declarations have been made +// in v8natives.js: +// const $isFinite = GlobalIsFinite; + +// ------------------------------------------------------------------- + +// This file contains date support implemented in JavaScript. + + +// Keep reference to original values of some global properties. This +// has the added benefit that the code in this file is isolated from +// changes to these properties. +const $Date = global.Date; + +// Helper function to throw error. +function ThrowDateTypeError() { + throw new $TypeError('this is not a Date object.'); +} + +// ECMA 262 - 5.2 +function Modulo(value, remainder) { + var mod = value % remainder; + // Guard against returning -0. + if (mod == 0) return 0; + return mod >= 0 ? mod : mod + remainder; +} + + +function TimeWithinDay(time) { + return Modulo(time, msPerDay); +} + + +// ECMA 262 - 15.9.1.3 +function DaysInYear(year) { + if (year % 4 != 0) return 365; + if ((year % 100 == 0) && (year % 400 != 0)) return 365; + return 366; +} + + +function DayFromYear(year) { + return 365 * (year-1970) + + FLOOR((year-1969)/4) + - FLOOR((year-1901)/100) + + FLOOR((year-1601)/400); +} + + +function TimeFromYear(year) { + return msPerDay * DayFromYear(year); +} + + +function InLeapYear(time) { + return DaysInYear(YEAR_FROM_TIME(time)) == 366 ? 1 : 0; +} + + +function DayWithinYear(time) { + return DAY(time) - DayFromYear(YEAR_FROM_TIME(time)); +} + + +// ECMA 262 - 15.9.1.9 +function EquivalentYear(year) { + // Returns an equivalent year in the range [2008-2035] matching + // - leap year. + // - week day of first day. + var time = TimeFromYear(year); + var recent_year = (InLeapYear(time) == 0 ? 1967 : 1956) + + (WeekDay(time) * 12) % 28; + // Find the year in the range 2008..2037 that is equivalent mod 28. + // Add 3*28 to give a positive argument to the modulus operator. + return 2008 + (recent_year + 3*28 - 2008) % 28; +} + + +function EquivalentTime(t) { + // The issue here is that some library calls don't work right for dates + // that cannot be represented using a non-negative signed 32 bit integer + // (measured in whole seconds based on the 1970 epoch). + // We solve this by mapping the time to a year with same leap-year-ness + // and same starting day for the year. The ECMAscript specification says + // we must do this, but for compatibility with other browsers, we use + // the actual year if it is in the range 1970..2037 + if (t >= 0 && t <= 2.1e12) return t; + + var day = MakeDay(EquivalentYear(YEAR_FROM_TIME(t)), + MONTH_FROM_TIME(t), + DATE_FROM_TIME(t)); + return MakeDate(day, TimeWithinDay(t)); +} + + +// Because computing the DST offset is a pretty expensive operation +// we keep a cache of last computed offset along with a time interval +// where we know the cache is valid. +var DST_offset_cache = { + // Cached DST offset. + offset: 0, + // Time interval where the cached offset is valid. + start: 0, end: -1, + // Size of next interval expansion. + increment: 0 +}; + + +// NOTE: The implementation relies on the fact that no time zones have +// more than one daylight savings offset change per month. +// If this function is called with NaN it returns NaN. +function DaylightSavingsOffset(t) { + // Load the cache object from the builtins object. + var cache = DST_offset_cache; + + // Cache the start and the end in local variables for fast access. + var start = cache.start; + var end = cache.end; + + if (start <= t) { + // If the time fits in the cached interval, return the cached offset. + if (t <= end) return cache.offset; + + // Compute a possible new interval end. + var new_end = end + cache.increment; + + if (t <= new_end) { + var end_offset = %DateDaylightSavingsOffset(EquivalentTime(new_end)); + if (cache.offset == end_offset) { + // If the offset at the end of the new interval still matches + // the offset in the cache, we grow the cached time interval + // and return the offset. + cache.end = new_end; + cache.increment = msPerMonth; + return end_offset; + } else { + var offset = %DateDaylightSavingsOffset(EquivalentTime(t)); + if (offset == end_offset) { + // The offset at the given time is equal to the offset at the + // new end of the interval, so that means that we've just skipped + // the point in time where the DST offset change occurred. Updated + // the interval to reflect this and reset the increment. + cache.start = t; + cache.end = new_end; + cache.increment = msPerMonth; + } else { + // The interval contains a DST offset change and the given time is + // before it. Adjust the increment to avoid a linear search for + // the offset change point and change the end of the interval. + cache.increment /= 3; + cache.end = t; + } + // Update the offset in the cache and return it. + cache.offset = offset; + return offset; + } + } + } + + // Compute the DST offset for the time and shrink the cache interval + // to only contain the time. This allows fast repeated DST offset + // computations for the same time. + var offset = %DateDaylightSavingsOffset(EquivalentTime(t)); + cache.offset = offset; + cache.start = cache.end = t; + cache.increment = msPerMonth; + return offset; +} + + +var timezone_cache_time = $NaN; +var timezone_cache_timezone; + +function LocalTimezone(t) { + if (NUMBER_IS_NAN(t)) return ""; + if (t == timezone_cache_time) { + return timezone_cache_timezone; + } + var timezone = %DateLocalTimezone(EquivalentTime(t)); + timezone_cache_time = t; + timezone_cache_timezone = timezone; + return timezone; +} + + +function WeekDay(time) { + return Modulo(DAY(time) + 4, 7); +} + +var local_time_offset = %DateLocalTimeOffset(); + +function LocalTime(time) { + if (NUMBER_IS_NAN(time)) return time; + return time + local_time_offset + DaylightSavingsOffset(time); +} + +function LocalTimeNoCheck(time) { + if (time < -MAX_TIME_MS || time > MAX_TIME_MS) { + return $NaN; + } + + // Inline the DST offset cache checks for speed. + var cache = DST_offset_cache; + if (cache.start <= time && time <= cache.end) { + var dst_offset = cache.offset; + } else { + var dst_offset = DaylightSavingsOffset(time); + } + return time + local_time_offset + dst_offset; +} + + +function UTC(time) { + if (NUMBER_IS_NAN(time)) return time; + var tmp = time - local_time_offset; + return tmp - DaylightSavingsOffset(tmp); +} + + +// ECMA 262 - 15.9.1.11 +function MakeTime(hour, min, sec, ms) { + if (!$isFinite(hour)) return $NaN; + if (!$isFinite(min)) return $NaN; + if (!$isFinite(sec)) return $NaN; + if (!$isFinite(ms)) return $NaN; + return TO_INTEGER(hour) * msPerHour + + TO_INTEGER(min) * msPerMinute + + TO_INTEGER(sec) * msPerSecond + + TO_INTEGER(ms); +} + + +// ECMA 262 - 15.9.1.12 +function TimeInYear(year) { + return DaysInYear(year) * msPerDay; +} + + +var ymd_from_time_cache = [$NaN, $NaN, $NaN]; +var ymd_from_time_cached_time = $NaN; + +function YearFromTime(t) { + if (t !== ymd_from_time_cached_time) { + if (!$isFinite(t)) { + return $NaN; + } + + %DateYMDFromTime(t, ymd_from_time_cache); + ymd_from_time_cached_time = t + } + + return ymd_from_time_cache[0]; +} + +function MonthFromTime(t) { + if (t !== ymd_from_time_cached_time) { + if (!$isFinite(t)) { + return $NaN; + } + %DateYMDFromTime(t, ymd_from_time_cache); + ymd_from_time_cached_time = t + } + + return ymd_from_time_cache[1]; +} + +function DateFromTime(t) { + if (t !== ymd_from_time_cached_time) { + if (!$isFinite(t)) { + return $NaN; + } + + %DateYMDFromTime(t, ymd_from_time_cache); + ymd_from_time_cached_time = t + } + + return ymd_from_time_cache[2]; +} + + +// Compute number of days given a year, month, date. +// Note that month and date can lie outside the normal range. +// For example: +// MakeDay(2007, -4, 20) --> MakeDay(2006, 8, 20) +// MakeDay(2007, -33, 1) --> MakeDay(2004, 3, 1) +// MakeDay(2007, 14, -50) --> MakeDay(2007, 8, 11) +function MakeDay(year, month, date) { + if (!$isFinite(year) || !$isFinite(month) || !$isFinite(date)) return $NaN; + + year = TO_INTEGER(year); + month = TO_INTEGER(month); + date = TO_INTEGER(date); + + if (year < kMinYear || year > kMaxYear || + month < kMinMonth || month > kMaxMonth || + date < kMinDate || date > kMaxDate) { + return $NaN; + } + + // Now we rely on year, month and date being SMIs. + return %DateMakeDay(year, month, date); +} + + +// ECMA 262 - 15.9.1.13 +function MakeDate(day, time) { + if (!$isFinite(day)) return $NaN; + if (!$isFinite(time)) return $NaN; + return day * msPerDay + time; +} + + +// ECMA 262 - 15.9.1.14 +function TimeClip(time) { + if (!$isFinite(time)) return $NaN; + if ($abs(time) > 8.64E15) return $NaN; + return TO_INTEGER(time); +} + + +// The Date cache is used to limit the cost of parsing the same Date +// strings over and over again. +var Date_cache = { + // Cached time value. + time: $NaN, + // Cached year when interpreting the time as a local time. Only + // valid when the time matches cached time. + year: $NaN, + // String input for which the cached time is valid. + string: null +}; + + +%SetCode($Date, function(year, month, date, hours, minutes, seconds, ms) { + if (!%_IsConstructCall()) { + // ECMA 262 - 15.9.2 + return (new $Date()).toString(); + } + + // ECMA 262 - 15.9.3 + var argc = %_ArgumentsLength(); + var value; + if (argc == 0) { + value = %DateCurrentTime(); + + } else if (argc == 1) { + if (IS_NUMBER(year)) { + value = TimeClip(year); + + } else if (IS_STRING(year)) { + // Probe the Date cache. If we already have a time value for the + // given time, we re-use that instead of parsing the string again. + var cache = Date_cache; + if (cache.string === year) { + value = cache.time; + } else { + value = DateParse(year); + if (!NUMBER_IS_NAN(value)) { + cache.time = value; + cache.year = YEAR_FROM_TIME(LocalTimeNoCheck(value)); + cache.string = year; + } + } + + } else { + // According to ECMA 262, no hint should be given for this + // conversion. However, ToPrimitive defaults to STRING_HINT for + // Date objects which will lose precision when the Date + // constructor is called with another Date object as its + // argument. We therefore use NUMBER_HINT for the conversion, + // which is the default for everything else than Date objects. + // This makes us behave like KJS and SpiderMonkey. + var time = ToPrimitive(year, NUMBER_HINT); + value = IS_STRING(time) ? DateParse(time) : TimeClip(ToNumber(time)); + } + + } else { + year = ToNumber(year); + month = ToNumber(month); + date = argc > 2 ? ToNumber(date) : 1; + hours = argc > 3 ? ToNumber(hours) : 0; + minutes = argc > 4 ? ToNumber(minutes) : 0; + seconds = argc > 5 ? ToNumber(seconds) : 0; + ms = argc > 6 ? ToNumber(ms) : 0; + year = (!NUMBER_IS_NAN(year) && 0 <= TO_INTEGER(year) && TO_INTEGER(year) <= 99) + ? 1900 + TO_INTEGER(year) : year; + var day = MakeDay(year, month, date); + var time = MakeTime(hours, minutes, seconds, ms); + value = TimeClip(UTC(MakeDate(day, time))); + } + %_SetValueOf(this, value); +}); + + +// Helper functions. +function GetTimeFrom(aDate) { + return DATE_VALUE(aDate); +} + +function GetMillisecondsFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return MS_FROM_TIME(LocalTimeNoCheck(t)); +} + + +function GetUTCMillisecondsFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return MS_FROM_TIME(t); +} + + +function GetSecondsFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return SEC_FROM_TIME(LocalTimeNoCheck(t)); +} + + +function GetUTCSecondsFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return SEC_FROM_TIME(t); +} + + +function GetMinutesFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return MIN_FROM_TIME(LocalTimeNoCheck(t)); +} + + +function GetUTCMinutesFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return MIN_FROM_TIME(t); +} + + +function GetHoursFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return HOUR_FROM_TIME(LocalTimeNoCheck(t)); +} + + +function GetUTCHoursFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return HOUR_FROM_TIME(t); +} + + +function GetFullYearFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + var cache = Date_cache; + if (cache.time === t) return cache.year; + return YEAR_FROM_TIME(LocalTimeNoCheck(t)); +} + + +function GetUTCFullYearFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return YEAR_FROM_TIME(t); +} + + +function GetMonthFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return MONTH_FROM_TIME(LocalTimeNoCheck(t)); +} + + +function GetUTCMonthFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return MONTH_FROM_TIME(t); +} + + +function GetDateFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return DATE_FROM_TIME(LocalTimeNoCheck(t)); +} + + +function GetUTCDateFrom(aDate) { + var t = DATE_VALUE(aDate); + if (NUMBER_IS_NAN(t)) return t; + return DATE_FROM_TIME(t); +} + + +%FunctionSetPrototype($Date, new $Date($NaN)); + + +var WeekDays = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']; +var Months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']; + + +function TwoDigitString(value) { + return value < 10 ? "0" + value : "" + value; +} + + +function DateString(time) { + return WeekDays[WeekDay(time)] + ' ' + + Months[MonthFromTime(time)] + ' ' + + TwoDigitString(DateFromTime(time)) + ' ' + + YearFromTime(time); +} + + +var LongWeekDays = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']; +var LongMonths = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']; + + +function LongDateString(time) { + return LongWeekDays[WeekDay(time)] + ', ' + + LongMonths[MonthFromTime(time)] + ' ' + + TwoDigitString(DateFromTime(time)) + ', ' + + YearFromTime(time); +} + + +function TimeString(time) { + return TwoDigitString(HOUR_FROM_TIME(time)) + ':' + + TwoDigitString(MIN_FROM_TIME(time)) + ':' + + TwoDigitString(SEC_FROM_TIME(time)); +} + + +function LocalTimezoneString(time) { + var timezoneOffset = + (local_time_offset + DaylightSavingsOffset(time)) / msPerMinute; + var sign = (timezoneOffset >= 0) ? 1 : -1; + var hours = FLOOR((sign * timezoneOffset)/60); + var min = FLOOR((sign * timezoneOffset)%60); + var gmt = ' GMT' + ((sign == 1) ? '+' : '-') + + TwoDigitString(hours) + TwoDigitString(min); + return gmt + ' (' + LocalTimezone(time) + ')'; +} + + +function DatePrintString(time) { + return DateString(time) + ' ' + TimeString(time); +} + +// ------------------------------------------------------------------- + +// Reused output buffer. Used when parsing date strings. +var parse_buffer = $Array(7); + +// ECMA 262 - 15.9.4.2 +function DateParse(string) { + var arr = %DateParseString(ToString(string), parse_buffer); + if (IS_NULL(arr)) return $NaN; + + var day = MakeDay(arr[0], arr[1], arr[2]); + var time = MakeTime(arr[3], arr[4], arr[5], 0); + var date = MakeDate(day, time); + + if (IS_NULL(arr[6])) { + return TimeClip(UTC(date)); + } else { + return TimeClip(date - arr[6] * 1000); + } +} + + +// ECMA 262 - 15.9.4.3 +function DateUTC(year, month, date, hours, minutes, seconds, ms) { + year = ToNumber(year); + month = ToNumber(month); + var argc = %_ArgumentsLength(); + date = argc > 2 ? ToNumber(date) : 1; + hours = argc > 3 ? ToNumber(hours) : 0; + minutes = argc > 4 ? ToNumber(minutes) : 0; + seconds = argc > 5 ? ToNumber(seconds) : 0; + ms = argc > 6 ? ToNumber(ms) : 0; + year = (!NUMBER_IS_NAN(year) && 0 <= TO_INTEGER(year) && TO_INTEGER(year) <= 99) + ? 1900 + TO_INTEGER(year) : year; + var day = MakeDay(year, month, date); + var time = MakeTime(hours, minutes, seconds, ms); + return %_SetValueOf(this, TimeClip(MakeDate(day, time))); +} + + +// Mozilla-specific extension. Returns the number of milliseconds +// elapsed since 1 January 1970 00:00:00 UTC. +function DateNow() { + return %DateCurrentTime(); +} + + +// ECMA 262 - 15.9.5.2 +function DateToString() { + var t = DATE_VALUE(this); + if (NUMBER_IS_NAN(t)) return kInvalidDate; + return DatePrintString(LocalTimeNoCheck(t)) + LocalTimezoneString(t); +} + + +// ECMA 262 - 15.9.5.3 +function DateToDateString() { + var t = DATE_VALUE(this); + if (NUMBER_IS_NAN(t)) return kInvalidDate; + return DateString(LocalTimeNoCheck(t)); +} + + +// ECMA 262 - 15.9.5.4 +function DateToTimeString() { + var t = DATE_VALUE(this); + if (NUMBER_IS_NAN(t)) return kInvalidDate; + var lt = LocalTimeNoCheck(t); + return TimeString(lt) + LocalTimezoneString(lt); +} + + +// ECMA 262 - 15.9.5.5 +function DateToLocaleString() { + return DateToString.call(this); +} + + +// ECMA 262 - 15.9.5.6 +function DateToLocaleDateString() { + var t = DATE_VALUE(this); + if (NUMBER_IS_NAN(t)) return kInvalidDate; + return LongDateString(LocalTimeNoCheck(t)); +} + + +// ECMA 262 - 15.9.5.7 +function DateToLocaleTimeString() { + var t = DATE_VALUE(this); + if (NUMBER_IS_NAN(t)) return kInvalidDate; + var lt = LocalTimeNoCheck(t); + return TimeString(lt); +} + + +// ECMA 262 - 15.9.5.8 +function DateValueOf() { + return DATE_VALUE(this); +} + + +// ECMA 262 - 15.9.5.9 +function DateGetTime() { + return DATE_VALUE(this); +} + + +// ECMA 262 - 15.9.5.10 +function DateGetFullYear() { + return GetFullYearFrom(this) +} + + +// ECMA 262 - 15.9.5.11 +function DateGetUTCFullYear() { + return GetUTCFullYearFrom(this) +} + + +// ECMA 262 - 15.9.5.12 +function DateGetMonth() { + return GetMonthFrom(this); +} + + +// ECMA 262 - 15.9.5.13 +function DateGetUTCMonth() { + return GetUTCMonthFrom(this); +} + + +// ECMA 262 - 15.9.5.14 +function DateGetDate() { + return GetDateFrom(this); +} + + +// ECMA 262 - 15.9.5.15 +function DateGetUTCDate() { + return GetUTCDateFrom(this); +} + + +// ECMA 262 - 15.9.5.16 +function DateGetDay() { + var t = %_ValueOf(this); + if (NUMBER_IS_NAN(t)) return t; + return WeekDay(LocalTimeNoCheck(t)); +} + + +// ECMA 262 - 15.9.5.17 +function DateGetUTCDay() { + var t = %_ValueOf(this); + if (NUMBER_IS_NAN(t)) return t; + return WeekDay(t); +} + + +// ECMA 262 - 15.9.5.18 +function DateGetHours() { + return GetHoursFrom(this); +} + + +// ECMA 262 - 15.9.5.19 +function DateGetUTCHours() { + return GetUTCHoursFrom(this); +} + + +// ECMA 262 - 15.9.5.20 +function DateGetMinutes() { + return GetMinutesFrom(this); +} + + +// ECMA 262 - 15.9.5.21 +function DateGetUTCMinutes() { + return GetUTCMinutesFrom(this); +} + + +// ECMA 262 - 15.9.5.22 +function DateGetSeconds() { + return GetSecondsFrom(this); +} + + +// ECMA 262 - 15.9.5.23 +function DateGetUTCSeconds() { + return GetUTCSecondsFrom(this); +} + + +// ECMA 262 - 15.9.5.24 +function DateGetMilliseconds() { + return GetMillisecondsFrom(this); +} + + +// ECMA 262 - 15.9.5.25 +function DateGetUTCMilliseconds() { + return GetUTCMillisecondsFrom(this); +} + + +// ECMA 262 - 15.9.5.26 +function DateGetTimezoneOffset() { + var t = DATE_VALUE(this); + if (NUMBER_IS_NAN(t)) return t; + return (t - LocalTimeNoCheck(t)) / msPerMinute; +} + + +// ECMA 262 - 15.9.5.27 +function DateSetTime(ms) { + if (!IS_DATE(this)) ThrowDateTypeError(); + return %_SetValueOf(this, TimeClip(ToNumber(ms))); +} + + +// ECMA 262 - 15.9.5.28 +function DateSetMilliseconds(ms) { + var t = LocalTime(DATE_VALUE(this)); + ms = ToNumber(ms); + var time = MakeTime(HOUR_FROM_TIME(t), MIN_FROM_TIME(t), SEC_FROM_TIME(t), ms); + return %_SetValueOf(this, TimeClip(UTC(MakeDate(DAY(t), time)))); +} + + +// ECMA 262 - 15.9.5.29 +function DateSetUTCMilliseconds(ms) { + var t = DATE_VALUE(this); + ms = ToNumber(ms); + var time = MakeTime(HOUR_FROM_TIME(t), MIN_FROM_TIME(t), SEC_FROM_TIME(t), ms); + return %_SetValueOf(this, TimeClip(MakeDate(DAY(t), time))); +} + + +// ECMA 262 - 15.9.5.30 +function DateSetSeconds(sec, ms) { + var t = LocalTime(DATE_VALUE(this)); + sec = ToNumber(sec); + ms = %_ArgumentsLength() < 2 ? GetMillisecondsFrom(this) : ToNumber(ms); + var time = MakeTime(HOUR_FROM_TIME(t), MIN_FROM_TIME(t), sec, ms); + return %_SetValueOf(this, TimeClip(UTC(MakeDate(DAY(t), time)))); +} + + +// ECMA 262 - 15.9.5.31 +function DateSetUTCSeconds(sec, ms) { + var t = DATE_VALUE(this); + sec = ToNumber(sec); + ms = %_ArgumentsLength() < 2 ? GetUTCMillisecondsFrom(this) : ToNumber(ms); + var time = MakeTime(HOUR_FROM_TIME(t), MIN_FROM_TIME(t), sec, ms); + return %_SetValueOf(this, TimeClip(MakeDate(DAY(t), time))); +} + + +// ECMA 262 - 15.9.5.33 +function DateSetMinutes(min, sec, ms) { + var t = LocalTime(DATE_VALUE(this)); + min = ToNumber(min); + var argc = %_ArgumentsLength(); + sec = argc < 2 ? GetSecondsFrom(this) : ToNumber(sec); + ms = argc < 3 ? GetMillisecondsFrom(this) : ToNumber(ms); + var time = MakeTime(HOUR_FROM_TIME(t), min, sec, ms); + return %_SetValueOf(this, TimeClip(UTC(MakeDate(DAY(t), time)))); +} + + +// ECMA 262 - 15.9.5.34 +function DateSetUTCMinutes(min, sec, ms) { + var t = DATE_VALUE(this); + min = ToNumber(min); + var argc = %_ArgumentsLength(); + sec = argc < 2 ? GetUTCSecondsFrom(this) : ToNumber(sec); + ms = argc < 3 ? GetUTCMillisecondsFrom(this) : ToNumber(ms); + var time = MakeTime(HOUR_FROM_TIME(t), min, sec, ms); + return %_SetValueOf(this, TimeClip(MakeDate(DAY(t), time))); +} + + +// ECMA 262 - 15.9.5.35 +function DateSetHours(hour, min, sec, ms) { + var t = LocalTime(DATE_VALUE(this)); + hour = ToNumber(hour); + var argc = %_ArgumentsLength(); + min = argc < 2 ? GetMinutesFrom(this) : ToNumber(min); + sec = argc < 3 ? GetSecondsFrom(this) : ToNumber(sec); + ms = argc < 4 ? GetMillisecondsFrom(this) : ToNumber(ms); + var time = MakeTime(hour, min, sec, ms); + return %_SetValueOf(this, TimeClip(UTC(MakeDate(DAY(t), time)))); +} + + +// ECMA 262 - 15.9.5.34 +function DateSetUTCHours(hour, min, sec, ms) { + var t = DATE_VALUE(this); + hour = ToNumber(hour); + var argc = %_ArgumentsLength(); + min = argc < 2 ? GetUTCMinutesFrom(this) : ToNumber(min); + sec = argc < 3 ? GetUTCSecondsFrom(this) : ToNumber(sec); + ms = argc < 4 ? GetUTCMillisecondsFrom(this) : ToNumber(ms); + var time = MakeTime(hour, min, sec, ms); + return %_SetValueOf(this, TimeClip(MakeDate(DAY(t), time))); +} + + +// ECMA 262 - 15.9.5.36 +function DateSetDate(date) { + var t = LocalTime(DATE_VALUE(this)); + date = ToNumber(date); + var day = MakeDay(YEAR_FROM_TIME(t), MONTH_FROM_TIME(t), date); + return %_SetValueOf(this, TimeClip(UTC(MakeDate(day, TimeWithinDay(t))))); +} + + +// ECMA 262 - 15.9.5.37 +function DateSetUTCDate(date) { + var t = DATE_VALUE(this); + date = ToNumber(date); + var day = MakeDay(YEAR_FROM_TIME(t), MONTH_FROM_TIME(t), date); + return %_SetValueOf(this, TimeClip(MakeDate(day, TimeWithinDay(t)))); +} + + +// ECMA 262 - 15.9.5.38 +function DateSetMonth(month, date) { + var t = LocalTime(DATE_VALUE(this)); + month = ToNumber(month); + date = %_ArgumentsLength() < 2 ? GetDateFrom(this) : ToNumber(date); + var day = MakeDay(YEAR_FROM_TIME(t), month, date); + return %_SetValueOf(this, TimeClip(UTC(MakeDate(day, TimeWithinDay(t))))); +} + + +// ECMA 262 - 15.9.5.39 +function DateSetUTCMonth(month, date) { + var t = DATE_VALUE(this); + month = ToNumber(month); + date = %_ArgumentsLength() < 2 ? GetUTCDateFrom(this) : ToNumber(date); + var day = MakeDay(YEAR_FROM_TIME(t), month, date); + return %_SetValueOf(this, TimeClip(MakeDate(day, TimeWithinDay(t)))); +} + + +// ECMA 262 - 15.9.5.40 +function DateSetFullYear(year, month, date) { + var t = DATE_VALUE(this); + t = NUMBER_IS_NAN(t) ? 0 : LocalTimeNoCheck(t); + year = ToNumber(year); + var argc = %_ArgumentsLength(); + month = argc < 2 ? MONTH_FROM_TIME(t) : ToNumber(month); + date = argc < 3 ? DATE_FROM_TIME(t) : ToNumber(date); + var day = MakeDay(year, month, date); + return %_SetValueOf(this, TimeClip(UTC(MakeDate(day, TimeWithinDay(t))))); +} + + +// ECMA 262 - 15.9.5.41 +function DateSetUTCFullYear(year, month, date) { + var t = DATE_VALUE(this); + if (NUMBER_IS_NAN(t)) t = 0; + var argc = %_ArgumentsLength(); + year = ToNumber(year); + month = argc < 2 ? MONTH_FROM_TIME(t) : ToNumber(month); + date = argc < 3 ? DATE_FROM_TIME(t) : ToNumber(date); + var day = MakeDay(year, month, date); + return %_SetValueOf(this, TimeClip(MakeDate(day, TimeWithinDay(t)))); +} + + +// ECMA 262 - 15.9.5.42 +function DateToUTCString() { + var t = DATE_VALUE(this); + if (NUMBER_IS_NAN(t)) return kInvalidDate; + // Return UTC string of the form: Sat, 31 Jan 1970 23:00:00 GMT + return WeekDays[WeekDay(t)] + ', ' + + TwoDigitString(DATE_FROM_TIME(t)) + ' ' + + Months[MONTH_FROM_TIME(t)] + ' ' + + YEAR_FROM_TIME(t) + ' ' + + TimeString(t) + ' GMT'; +} + + +// ECMA 262 - B.2.4 +function DateGetYear() { + var t = DATE_VALUE(this); + if (NUMBER_IS_NAN(t)) return $NaN; + return YEAR_FROM_TIME(LocalTimeNoCheck(t)) - 1900; +} + + +// ECMA 262 - B.2.5 +function DateSetYear(year) { + var t = LocalTime(DATE_VALUE(this)); + if (NUMBER_IS_NAN(t)) t = 0; + year = ToNumber(year); + if (NUMBER_IS_NAN(year)) return %_SetValueOf(this, $NaN); + year = (0 <= TO_INTEGER(year) && TO_INTEGER(year) <= 99) + ? 1900 + TO_INTEGER(year) : year; + var day = MakeDay(year, MONTH_FROM_TIME(t), DATE_FROM_TIME(t)); + return %_SetValueOf(this, TimeClip(UTC(MakeDate(day, TimeWithinDay(t))))); +} + + +// ECMA 262 - B.2.6 +// +// Notice that this does not follow ECMA 262 completely. ECMA 262 +// says that toGMTString should be the same Function object as +// toUTCString. JSC does not do this, so for compatibility we do not +// do that either. Instead, we create a new function whose name +// property will return toGMTString. +function DateToGMTString() { + return DateToUTCString.call(this); +} + + +function PadInt(n, digits) { + if (digits == 1) return n; + return n < MathPow(10, digits - 1) ? '0' + PadInt(n, digits - 1) : n; +} + + +function DateToISOString() { + var t = DATE_VALUE(this); + if (NUMBER_IS_NAN(t)) return kInvalidDate; + return this.getUTCFullYear() + '-' + PadInt(this.getUTCMonth() + 1, 2) + + '-' + PadInt(this.getUTCDate(), 2) + 'T' + PadInt(this.getUTCHours(), 2) + + ':' + PadInt(this.getUTCMinutes(), 2) + ':' + PadInt(this.getUTCSeconds(), 2) + + '.' + PadInt(this.getUTCMilliseconds(), 3) + + 'Z'; +} + + +function DateToJSON(key) { + return CheckJSONPrimitive(this.toISOString()); +} + + +// ------------------------------------------------------------------- + +function SetupDate() { + // Setup non-enumerable properties of the Date object itself. + InstallFunctions($Date, DONT_ENUM, $Array( + "UTC", DateUTC, + "parse", DateParse, + "now", DateNow + )); + + // Setup non-enumerable constructor property of the Date prototype object. + %SetProperty($Date.prototype, "constructor", $Date, DONT_ENUM); + + // Setup non-enumerable functions of the Date prototype object and + // set their names. + InstallFunctionsOnHiddenPrototype($Date.prototype, DONT_ENUM, $Array( + "toString", DateToString, + "toDateString", DateToDateString, + "toTimeString", DateToTimeString, + "toLocaleString", DateToLocaleString, + "toLocaleDateString", DateToLocaleDateString, + "toLocaleTimeString", DateToLocaleTimeString, + "valueOf", DateValueOf, + "getTime", DateGetTime, + "getFullYear", DateGetFullYear, + "getUTCFullYear", DateGetUTCFullYear, + "getMonth", DateGetMonth, + "getUTCMonth", DateGetUTCMonth, + "getDate", DateGetDate, + "getUTCDate", DateGetUTCDate, + "getDay", DateGetDay, + "getUTCDay", DateGetUTCDay, + "getHours", DateGetHours, + "getUTCHours", DateGetUTCHours, + "getMinutes", DateGetMinutes, + "getUTCMinutes", DateGetUTCMinutes, + "getSeconds", DateGetSeconds, + "getUTCSeconds", DateGetUTCSeconds, + "getMilliseconds", DateGetMilliseconds, + "getUTCMilliseconds", DateGetUTCMilliseconds, + "getTimezoneOffset", DateGetTimezoneOffset, + "setTime", DateSetTime, + "setMilliseconds", DateSetMilliseconds, + "setUTCMilliseconds", DateSetUTCMilliseconds, + "setSeconds", DateSetSeconds, + "setUTCSeconds", DateSetUTCSeconds, + "setMinutes", DateSetMinutes, + "setUTCMinutes", DateSetUTCMinutes, + "setHours", DateSetHours, + "setUTCHours", DateSetUTCHours, + "setDate", DateSetDate, + "setUTCDate", DateSetUTCDate, + "setMonth", DateSetMonth, + "setUTCMonth", DateSetUTCMonth, + "setFullYear", DateSetFullYear, + "setUTCFullYear", DateSetUTCFullYear, + "toGMTString", DateToGMTString, + "toUTCString", DateToUTCString, + "getYear", DateGetYear, + "setYear", DateSetYear, + "toISOString", DateToISOString, + "toJSON", DateToJSON + )); +} + +SetupDate(); |