// 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(YearFromTime(time)) - 365; // Returns 1 or 0. } // 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(YearFromTime(t)), MonthFromTime(t), DateFromTime(t)); return MakeDate(day, TimeWithinDay(t)); } // local_time_offset is initialized when the DST_offset_cache is missed. // It must not be used until after a call to DaylightSavingsOffset(). // In this way, only one check, for a DST cache miss, is needed. var local_time_offset; // Because computing the DST offset is an expensive operation, // we keep a cache of the last computed DST offset along with a time interval // where we know the cache is valid. // When the cache is valid, local_time_offset is also 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, initial_increment: 19 * msPerDay }; // NOTE: The implementation relies on the fact that no time zones have // more than one daylight savings offset change per 19 days. // // In Egypt in 2010 they decided to suspend DST during Ramadan. This // led to a short interval where DST is in effect from September 10 to // September 30. // // 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; // If the cache misses, the local_time_offset may not be initialized. if (IS_UNDEFINED(local_time_offset)) { local_time_offset = %DateLocalTimeOffset(); } // 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 = cache.initial_increment; 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 = cache.initial_increment; } 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; } } } // If the cache misses, the local_time_offset may not be initialized. if (IS_UNDEFINED(local_time_offset)) { local_time_offset = %DateLocalTimeOffset(); } // 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 = cache.initial_increment; return offset; } var timezone_cache_time = $NaN; var timezone_cache_timezone; function LocalTimezone(t) { if (NUMBER_IS_NAN(t)) return ""; if (t == timezone_cache_time) { return timezone_cache_timezone; } var timezone = %DateLocalTimezone(EquivalentTime(t)); timezone_cache_time = t; timezone_cache_timezone = timezone; return timezone; } function WeekDay(time) { return Modulo(DAY(time) + 4, 7); } function LocalTime(time) { if (NUMBER_IS_NAN(time)) return time; // DaylightSavingsOffset called before local_time_offset used. return time + DaylightSavingsOffset(time) + local_time_offset; } var ltcache = { key: null, val: null }; function LocalTimeNoCheck(time) { var ltc = ltcache; if (%_ObjectEquals(time, ltc.key)) return ltc.val; // Inline the DST offset cache checks for speed. // The cache is hit, or DaylightSavingsOffset is called, // before local_time_offset is used. var cache = DST_offset_cache; if (cache.start <= time && time <= cache.end) { var dst_offset = cache.offset; } else { var dst_offset = DaylightSavingsOffset(time); } ltc.key = time; return (ltc.val = time + local_time_offset + dst_offset); } function UTC(time) { if (NUMBER_IS_NAN(time)) return time; // local_time_offset is needed before the call to DaylightSavingsOffset, // so it may be uninitialized. if (IS_UNDEFINED(local_time_offset)) { local_time_offset = %DateLocalTimeOffset(); } var tmp = time - local_time_offset; return tmp - DaylightSavingsOffset(tmp); } // ECMA 262 - 15.9.1.11 function MakeTime(hour, min, sec, ms) { if (!$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; // Convert to integer and map -0 to 0. year = TO_INTEGER_MAP_MINUS_ZERO(year); month = TO_INTEGER_MAP_MINUS_ZERO(month); date = TO_INTEGER_MAP_MINUS_ZERO(date); if (year < kMinYear || year > kMaxYear || month < kMinMonth || month > kMaxMonth || date < kMinDate || date > kMaxDate) { return $NaN; } // Now we rely on year, month and date being SMIs. return %DateMakeDay(year, month, date); } // ECMA 262 - 15.9.1.13 function MakeDate(day, time) { var time = day * msPerDay + time; // Some of our runtime funtions for computing UTC(time) rely on // times not being significantly larger than MAX_TIME_MS. If there // is no way that the time can be within range even after UTC // conversion we return NaN immediately instead of relying on // TimeClip to do it. if ($abs(time) > MAX_TIME_BEFORE_UTC) return $NaN; return time; } // ECMA 262 - 15.9.1.14 function TimeClip(time) { if (!$isFinite(time)) return $NaN; if ($abs(time) > MAX_TIME_MS) 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 $Date()).toString(); } // ECMA 262 - 15.9.3 var argc = %_ArgumentsLength(); var value; if (argc == 0) { value = %DateCurrentTime(); } else if (argc == 1) { if (IS_NUMBER(year)) { value = TimeClip(year); } else if (IS_STRING(year)) { // Probe the Date cache. If we already have a time value for the // given time, we re-use that instead of parsing the string again. var cache = Date_cache; if (cache.string === year) { value = cache.time; } else { value = DateParse(year); if (!NUMBER_IS_NAN(value)) { cache.time = value; cache.year = YearFromTime(LocalTimeNoCheck(value)); cache.string = year; } } } else { // According to ECMA 262, no hint should be given for this // conversion. However, ToPrimitive defaults to STRING_HINT for // Date objects which will lose precision when the Date // constructor is called with another Date object as its // argument. We therefore use NUMBER_HINT for the conversion, // which is the default for everything else than Date objects. // This makes us behave like KJS and SpiderMonkey. var time = ToPrimitive(year, NUMBER_HINT); value = IS_STRING(time) ? DateParse(time) : TimeClip(ToNumber(time)); } } else { year = ToNumber(year); month = ToNumber(month); date = argc > 2 ? ToNumber(date) : 1; hours = argc > 3 ? ToNumber(hours) : 0; minutes = argc > 4 ? ToNumber(minutes) : 0; seconds = argc > 5 ? ToNumber(seconds) : 0; ms = argc > 6 ? ToNumber(ms) : 0; year = (!NUMBER_IS_NAN(year) && 0 <= TO_INTEGER(year) && TO_INTEGER(year) <= 99) ? 1900 + TO_INTEGER(year) : year; var day = MakeDay(year, month, date); var time = MakeTime(hours, minutes, seconds, ms); value = TimeClip(UTC(MakeDate(day, time))); } %_SetValueOf(this, value); }); %FunctionSetPrototype($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 old_timezone = timezone_cache_timezone; var timezone = LocalTimezone(time); if (old_timezone && timezone != old_timezone) { // If the timezone string has changed from the one that we cached, // the local time offset may now be wrong. So we need to update it // and try again. local_time_offset = %DateLocalTimeOffset(); // We also need to invalidate the DST cache as the new timezone may have // different DST times. var dst_cache = DST_offset_cache; dst_cache.start = 0; dst_cache.end = -1; } var timezoneOffset = (DaylightSavingsOffset(time) + local_time_offset) / 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 + ' (' + timezone + ')'; } function DatePrintString(time) { return DateString(time) + ' ' + TimeString(time); } // ------------------------------------------------------------------- // Reused output buffer. Used when parsing date strings. var parse_buffer = $Array(8); // 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], arr[6]); var date = MakeDate(day, time); if (IS_NULL(arr[7])) { return TimeClip(UTC(date)); } else { return TimeClip(date - arr[7] * 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; var time_zone_string = LocalTimezoneString(t); // May update local offset. return DatePrintString(LocalTimeNoCheck(t)) + time_zone_string; } // 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 time_zone_string = LocalTimezoneString(t); // May update local offset. return TimeString(LocalTimeNoCheck(t)) + time_zone_string; } // ECMA 262 - 15.9.5.5 function DateToLocaleString() { return %_CallFunction(this, DateToString); } // 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() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; var cache = Date_cache; if (cache.time === t) return cache.year; return YearFromTime(LocalTimeNoCheck(t)); } // ECMA 262 - 15.9.5.11 function DateGetUTCFullYear() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return YearFromTime(t); } // ECMA 262 - 15.9.5.12 function DateGetMonth() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return MonthFromTime(LocalTimeNoCheck(t)); } // ECMA 262 - 15.9.5.13 function DateGetUTCMonth() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return MonthFromTime(t); } // ECMA 262 - 15.9.5.14 function DateGetDate() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return DateFromTime(LocalTimeNoCheck(t)); } // ECMA 262 - 15.9.5.15 function DateGetUTCDate() { var t = DATE_VALUE(this); return NAN_OR_DATE_FROM_TIME(t); } // ECMA 262 - 15.9.5.16 function DateGetDay() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return WeekDay(LocalTimeNoCheck(t)); } // ECMA 262 - 15.9.5.17 function DateGetUTCDay() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return WeekDay(t); } // ECMA 262 - 15.9.5.18 function DateGetHours() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return HOUR_FROM_TIME(LocalTimeNoCheck(t)); } // ECMA 262 - 15.9.5.19 function DateGetUTCHours() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return HOUR_FROM_TIME(t); } // ECMA 262 - 15.9.5.20 function DateGetMinutes() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return MIN_FROM_TIME(LocalTimeNoCheck(t)); } // ECMA 262 - 15.9.5.21 function DateGetUTCMinutes() { var t = DATE_VALUE(this); return NAN_OR_MIN_FROM_TIME(t); } // ECMA 262 - 15.9.5.22 function DateGetSeconds() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return SEC_FROM_TIME(LocalTimeNoCheck(t)); } // ECMA 262 - 15.9.5.23 function DateGetUTCSeconds() { var t = DATE_VALUE(this); return NAN_OR_SEC_FROM_TIME(t); } // ECMA 262 - 15.9.5.24 function DateGetMilliseconds() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return t; return MS_FROM_TIME(LocalTimeNoCheck(t)); } // ECMA 262 - 15.9.5.25 function DateGetUTCMilliseconds() { var t = DATE_VALUE(this); return NAN_OR_MS_FROM_TIME(t); } // 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 ? NAN_OR_MS_FROM_TIME(t) : 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 ? NAN_OR_MS_FROM_TIME(t) : 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 ? NAN_OR_SEC_FROM_TIME(t) : ToNumber(sec); ms = argc < 3 ? NAN_OR_MS_FROM_TIME(t) : 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 ? NAN_OR_SEC_FROM_TIME(t) : ToNumber(sec); ms = argc < 3 ? NAN_OR_MS_FROM_TIME(t) : 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 ? NAN_OR_MIN_FROM_TIME(t) : ToNumber(min); sec = argc < 3 ? NAN_OR_SEC_FROM_TIME(t) : ToNumber(sec); ms = argc < 4 ? NAN_OR_MS_FROM_TIME(t) : 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 ? NAN_OR_MIN_FROM_TIME(t) : ToNumber(min); sec = argc < 3 ? NAN_OR_SEC_FROM_TIME(t) : ToNumber(sec); ms = argc < 4 ? NAN_OR_MS_FROM_TIME(t) : 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(YearFromTime(t), MonthFromTime(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(YearFromTime(t), MonthFromTime(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 ? NAN_OR_DATE_FROM_TIME(t) : ToNumber(date); var day = MakeDay(YearFromTime(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 ? NAN_OR_DATE_FROM_TIME(t) : ToNumber(date); var day = MakeDay(YearFromTime(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 ? MonthFromTime(t) : ToNumber(month); date = argc < 3 ? DateFromTime(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 ? MonthFromTime(t) : ToNumber(month); date = argc < 3 ? DateFromTime(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(DateFromTime(t)) + ' ' + Months[MonthFromTime(t)] + ' ' + YearFromTime(t) + ' ' + TimeString(t) + ' GMT'; } // ECMA 262 - B.2.4 function DateGetYear() { var t = DATE_VALUE(this); if (NUMBER_IS_NAN(t)) return $NaN; return YearFromTime(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, MonthFromTime(t), DateFromTime(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 %_CallFunction(this, DateToUTCString); } 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; var year = this.getUTCFullYear(); var year_string; if (year >= 0 && year <= 9999) { year_string = PadInt(year, 4); } else { if (year < 0) { year_string = "-" + PadInt(-year, 6); } else { year_string = "+" + PadInt(year, 6); } } return year_string + '-' + 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) { var o = ToObject(this); var tv = DefaultNumber(o); if (IS_NUMBER(tv) && !NUMBER_IS_FINITE(tv)) { return null; } return o.toISOString(); } function ResetDateCache() { // Reset the local_time_offset: local_time_offset = %DateLocalTimeOffset(); // Reset the DST offset cache: var cache = DST_offset_cache; cache.offset = 0; cache.start = 0; cache.end = -1; cache.increment = 0; cache.initial_increment = 19 * msPerDay; // Reset the timezone cache: timezone_cache_time = $NaN; timezone_cache_timezone = undefined; // Reset the ltcache: ltcache.key = null; ltcache.val = null; // Reset the ymd_from_time_cache: ymd_from_time_cache = [$NaN, $NaN, $NaN]; ymd_from_time_cached_time = $NaN; // Reset the date cache: cache = Date_cache; cache.time = $NaN; cache.year = $NaN; cache.string = null; } // ------------------------------------------------------------------- function SetUpDate() { %CheckIsBootstrapping(); // Set up non-enumerable properties of the Date object itself. InstallFunctions($Date, DONT_ENUM, $Array( "UTC", DateUTC, "parse", DateParse, "now", DateNow )); // Set up non-enumerable constructor property of the Date prototype object. %SetProperty($Date.prototype, "constructor", $Date, DONT_ENUM); // Set up non-enumerable functions of the Date prototype object and // set their names. InstallFunctionsOnHiddenPrototype($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();