date-delay.js.svn-base

Google浏览器V8内核代码

function GetUTCDateFrom(aDate) {
  var t = GetTimeFrom(aDate);
  if ($isNaN(t)) return t;
  return DateFromTime(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) {
  var YMD = FromJulianDay(Day(time) + kDayZeroInJulianDay);
  return WeekDays[WeekDay(time)] + ' '
      + Months[YMD.month] + ' '
      + TwoDigitString(YMD.date) + ' '
      + YMD.year;
};


function TimeString(time) {
  return TwoDigitString(HourFromTime(time)) + ':'
      + TwoDigitString(MinFromTime(time)) + ':'
      + TwoDigitString(SecFromTime(time));
};


function LocalTimezoneString(time) {
  var timezoneOffset = (LocalTimeOffset() + 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);
};

// -------------------------------------------------------------------


// ECMA 262 - 15.9.4.2
function DateParse(string) {
  var arr = %DateParseString(ToString(string));
  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 = (!$isNaN(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 = GetTimeFrom(this);
  if ($isNaN(t)) return kInvalidDate;
  return DatePrintString(LocalTime(t)) + LocalTimezoneString(t);
};


// ECMA 262 - 15.9.5.3
function DateToDateString() {
  var t = GetTimeFrom(this);
  if ($isNaN(t)) return kInvalidDate;
  return DateString(LocalTime(t));
};


// ECMA 262 - 15.9.5.4
function DateToTimeString() {
  var t = GetTimeFrom(this);
  if ($isNaN(t)) return kInvalidDate;
  var lt = LocalTime(t);
  return TimeString(lt) + LocalTimezoneString(lt);
};


// ECMA 262 - 15.9.5.7
function DateToLocaleTimeString() {
  var t = GetTimeFrom(this);
  if ($isNaN(t)) return kInvalidDate;
  var lt = LocalTime(t);
  return TimeString(lt);
};


// ECMA 262 - 15.9.5.9
function DateGetTime() {
  return GetTimeFrom(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 = GetTimeFrom(this);
  if ($isNaN(t)) return t;
  return WeekDay(LocalTime(t));
};


// ECMA 262 - 15.9.5.17
function DateGetUTCDay() {
  var t = GetTimeFrom(this);
  if ($isNaN(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 = GetTimeFrom(this);
  if ($isNaN(t)) return t;
  return (t - LocalTime(t)) / msPerMinute;
};


// ECMA 262 - 15.9.5.27
function DateSetTime(ms) {
  if (!IS_DATE(this)) throw new $TypeError('this is not a Date object.');
  return %_SetValueOf(this, TimeClip(ToNumber(ms)));
};


// ECMA 262 - 15.9.5.28
function DateSetMilliseconds(ms) {
  var t = LocalTime(GetTimeFrom(this));
  ms = ToNumber(ms);
  var time = MakeTime(HourFromTime(t), MinFromTime(t), SecFromTime(t), ms);
  return %_SetValueOf(this, TimeClip(UTC(MakeDate(Day(t), time))));
};


// ECMA 262 - 15.9.5.29
function DateSetUTCMilliseconds(ms) {
  var t = GetTimeFrom(this);
  ms = ToNumber(ms);
  var time = MakeTime(HourFromTime(t), MinFromTime(t), SecFromTime(t), ms);
  return %_SetValueOf(this, TimeClip(MakeDate(Day(t), time)));
};


// ECMA 262 - 15.9.5.30
function DateSetSeconds(sec, ms) {
  var t = LocalTime(GetTimeFrom(this));
  sec = ToNumber(sec);
  ms = %_ArgumentsLength() < 2 ? GetMillisecondsFrom(this) : ToNumber(ms);
  var time = MakeTime(HourFromTime(t), MinFromTime(t), sec, ms);
  return %_SetValueOf(this, TimeClip(UTC(MakeDate(Day(t), time))));
};


// ECMA 262 - 15.9.5.31
function DateSetUTCSeconds(sec, ms) {
  var t = GetTimeFrom(this);
  sec = ToNumber(sec);
  ms = %_ArgumentsLength() < 2 ? GetUTCMillisecondsFrom(this) : ToNumber(ms);
  var time = MakeTime(HourFromTime(t), MinFromTime(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(GetTimeFrom(this));
  min = ToNumber(min);
  var argc = %_ArgumentsLength();
  sec = argc < 2 ? GetSecondsFrom(this) : ToNumber(sec);
  ms = argc < 3 ? GetMillisecondsFrom(this) : ToNumber(ms);
  var time = MakeTime(HourFromTime(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 = GetTimeFrom(this);
  min = ToNumber(min);
  var argc = %_ArgumentsLength();
  sec = argc < 2 ? GetUTCSecondsFrom(this) : ToNumber(sec);
  ms = argc < 3 ? GetUTCMillisecondsFrom(this) : ToNumber(ms);
  var time = MakeTime(HourFromTime(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(GetTimeFrom(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 = GetTimeFrom(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(GetTimeFrom(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 = GetTimeFrom(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(GetTimeFrom(this));
  month = ToNumber(month);
  date = %_ArgumentsLength() < 2 ? GetDateFrom(this) : 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 = GetTimeFrom(this);
  month = ToNumber(month);
  date = %_ArgumentsLength() < 2 ? GetUTCDateFrom(this) : 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 = GetTimeFrom(this);
  t = $isNaN(t) ? 0 : LocalTime(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 = GetTimeFrom(this);
  if ($isNaN(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 = GetTimeFrom(this);
  if ($isNaN(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 = GetTimeFrom(this);
  if ($isNaN(t)) return $NaN;
  return YearFromTime(LocalTime(t)) - 1900;
};


// ECMA 262 - B.2.5
function DateSetYear(year) {
  var t = LocalTime(GetTimeFrom(this));
  if ($isNaN(t)) t = 0;
  year = ToNumber(year);
  if ($isNaN(year)) return %_SetValueOf(this, $NaN);
  year = (0 <= TO_INTEGER(year) && TO_INTEGER(year) <= 99)
      ? 1900 + TO_INTEGER(year) : year;
  var day = MakeDay(year, GetMonthFrom(this), GetDateFrom(this));
  return %_SetValueOf(this, TimeClip(UTC(MakeDate(day, TimeWithinDay(t)))));
};


// -------------------------------------------------------------------

function SetupDate() {
  // Setup non-enumerable properties of the Date object itself.
  InstallProperties($Date, DONT_ENUM, {
    UTC: DateUTC,
    parse: DateParse,
    now: DateNow
  });

  // Setup non-enumerable properties of the Date prototype object.
  InstallProperties($Date.prototype, DONT_ENUM, {
    constructor: $Date,
    toString: DateToString,
    toDateString: DateToDateString,
    toTimeString: DateToTimeString,
    toLocaleString: DateToString,
    toLocaleDateString: DateToDateString,
    toLocaleTimeString: DateToLocaleTimeString,
    valueOf: DateGetTime,
    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,
    toUTCString: DateToUTCString,
    toGMTString: DateToUTCString,
    getYear: DateGetYear,
    setYear: DateSetYear
  });
};

SetupDate();