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+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+/*
+ * Date functions used by tests in Date suite
+ *
+ */
+var msPerDay = 86400000;
+var HoursPerDay = 24;
+var MinutesPerHour = 60;
+var SecondsPerMinute = 60;
+var msPerSecond = 1000;
+var msPerMinute = 60000; // msPerSecond * SecondsPerMinute
+var msPerHour = 3600000; // msPerMinute * MinutesPerHour
+var TZ_DIFF = getTimeZoneDiff(); // offset of tester's timezone from UTC
+var TZ_ADJUST = TZ_DIFF * msPerHour;
+var TZ_PST = -8; // offset of Pacific Standard Time from UTC
+var PST_DIFF = TZ_DIFF - TZ_PST; // offset of tester's timezone from PST
+var TIME_1970 = 0;
+var TIME_2000 = 946684800000;
+var TIME_1900 = -2208988800000;
+var UTC_29_FEB_2000 = TIME_2000 + 31*msPerDay + 28*msPerDay;
+var UTC_1_JAN_2005 = TIME_2000 + TimeInYear(2000) + TimeInYear(2001) +
+ TimeInYear(2002) + TimeInYear(2003) + TimeInYear(2004);
+var now = new Date();
+var TIME_NOW = now.valueOf(); //valueOf() is to accurate to the millisecond
+ //Date.parse() is accurate only to the second
+
+/*
+ * Originally, the test suite used a hard-coded value TZ_DIFF = -8.
+ * But that was only valid for testers in the Pacific Standard Time Zone!
+ * We calculate the proper number dynamically for any tester. We just
+ * have to be careful not to use a date subject to Daylight Savings Time...
+ */
+function getTimeZoneDiff()
+{
+ return -((new Date(2000, 1, 1)).getTimezoneOffset())/60;
+}
+
+
+/*
+ * Date test "ResultArrays" are hard-coded for Pacific Standard Time.
+ * We must adjust them for the tester's own timezone -
+ */
+function adjustResultArray(ResultArray, msMode)
+{
+ // If the tester's system clock is in PST, no need to continue -
+ if (!PST_DIFF) {return;}
+
+ /* The date testcases instantiate Date objects in two different ways:
+ *
+ * millisecond mode: e.g. dt = new Date(10000000);
+ * year-month-day mode: dt = new Date(2000, 5, 1, ...);
+ *
+ * In the first case, the date is measured from Time 0 in Greenwich (i.e. UTC).
+ * In the second case, it is measured with reference to the tester's local timezone.
+ *
+ * In the first case we must correct those values expected for local measurements,
+ * like dt.getHours() etc. No correction is necessary for dt.getUTCHours() etc.
+ *
+ * In the second case, it is exactly the other way around -
+ */
+ if (msMode)
+ {
+ // The hard-coded UTC milliseconds from Time 0 derives from a UTC date.
+ // Shift to the right by the offset between UTC and the tester.
+ var t = ResultArray[TIME] + TZ_DIFF*msPerHour;
+
+ // Use our date arithmetic functions to determine the local hour, day, etc.
+ ResultArray[HOURS] = HourFromTime(t);
+ ResultArray[DAY] = WeekDay(t);
+ ResultArray[DATE] = DateFromTime(t);
+ ResultArray[MONTH] = MonthFromTime(t);
+ ResultArray[YEAR] = YearFromTime(t);
+ }
+ else
+ {
+ // The hard-coded UTC milliseconds from Time 0 derives from a PST date.
+ // Shift to the left by the offset between PST and the tester.
+ var t = ResultArray[TIME] - PST_DIFF*msPerHour;
+
+ // Use our date arithmetic functions to determine the UTC hour, day, etc.
+ ResultArray[TIME] = t;
+ ResultArray[UTC_HOURS] = HourFromTime(t);
+ ResultArray[UTC_DAY] = WeekDay(t);
+ ResultArray[UTC_DATE] = DateFromTime(t);
+ ResultArray[UTC_MONTH] = MonthFromTime(t);
+ ResultArray[UTC_YEAR] = YearFromTime(t);
+ }
+}
+
+
+function Day( t ) {
+ return ( Math.floor(t/msPerDay ) );
+}
+function DaysInYear( y ) {
+ if ( y % 4 != 0 ) {
+ return 365;
+ }
+ if ( (y % 4 == 0) && (y % 100 != 0) ) {
+ return 366;
+ }
+ if ( (y % 100 == 0) && (y % 400 != 0) ) {
+ return 365;
+ }
+ if ( (y % 400 == 0) ){
+ return 366;
+ } else {
+ return "ERROR: DaysInYear(" + y + ") case not covered";
+ }
+}
+function TimeInYear( y ) {
+ return ( DaysInYear(y) * msPerDay );
+}
+function DayNumber( t ) {
+ return ( Math.floor( t / msPerDay ) );
+}
+function TimeWithinDay( t ) {
+
+ var r = t % msPerDay;
+
+ if (r < 0)
+ {
+ r += msPerDay;
+ }
+ return r;
+
+}
+function YearNumber( t ) {
+}
+function TimeFromYear( y ) {
+ return ( msPerDay * DayFromYear(y) );
+}
+function DayFromYear( y ) {
+ return ( 365*(y-1970) +
+ Math.floor((y-1969)/4) -
+ Math.floor((y-1901)/100) +
+ Math.floor((y-1601)/400) );
+}
+function InLeapYear( t ) {
+ if ( DaysInYear(YearFromTime(t)) == 365 ) {
+ return 0;
+ }
+ if ( DaysInYear(YearFromTime(t)) == 366 ) {
+ return 1;
+ } else {
+ return "ERROR: InLeapYear("+ t + ") case not covered";
+ }
+}
+function YearFromTime( t ) {
+ t = Number( t );
+ var sign = ( t < 0 ) ? -1 : 1;
+ var year = ( sign < 0 ) ? 1969 : 1970;
+ for ( var timeToTimeZero = t; ; ) {
+ // subtract the current year's time from the time that's left.
+ timeToTimeZero -= sign * TimeInYear(year)
+
+ // if there's less than the current year's worth of time left, then break.
+ if ( sign < 0 ) {
+ if ( sign * timeToTimeZero <= 0 ) {
+ break;
+ } else {
+ year += sign;
+ }
+ } else {
+ if ( sign * timeToTimeZero < 0 ) {
+ break;
+ } else {
+ year += sign;
+ }
+ }
+ }
+ return ( year );
+}
+function MonthFromTime( t ) {
+ // i know i could use switch but i'd rather not until it's part of ECMA
+ var day = DayWithinYear( t );
+ var leap = InLeapYear(t);
+
+ if ( (0 <= day) && (day < 31) ) {
+ return 0;
+ }
+ if ( (31 <= day) && (day < (59+leap)) ) {
+ return 1;
+ }
+ if ( ((59+leap) <= day) && (day < (90+leap)) ) {
+ return 2;
+ }
+ if ( ((90+leap) <= day) && (day < (120+leap)) ) {
+ return 3;
+ }
+ if ( ((120+leap) <= day) && (day < (151+leap)) ) {
+ return 4;
+ }
+ if ( ((151+leap) <= day) && (day < (181+leap)) ) {
+ return 5;
+ }
+ if ( ((181+leap) <= day) && (day < (212+leap)) ) {
+ return 6;
+ }
+ if ( ((212+leap) <= day) && (day < (243+leap)) ) {
+ return 7;
+ }
+ if ( ((243+leap) <= day) && (day < (273+leap)) ) {
+ return 8;
+ }
+ if ( ((273+leap) <= day) && (day < (304+leap)) ) {
+ return 9;
+ }
+ if ( ((304+leap) <= day) && (day < (334+leap)) ) {
+ return 10;
+ }
+ if ( ((334+leap) <= day) && (day < (365+leap)) ) {
+ return 11;
+ } else {
+ return "ERROR: MonthFromTime("+t+") not known";
+ }
+}
+function DayWithinYear( t ) {
+ return( Day(t) - DayFromYear(YearFromTime(t)));
+}
+function DateFromTime( t ) {
+ var day = DayWithinYear(t);
+ var month = MonthFromTime(t);
+
+ if ( month == 0 ) {
+ return ( day + 1 );
+ }
+ if ( month == 1 ) {
+ return ( day - 30 );
+ }
+ if ( month == 2 ) {
+ return ( day - 58 - InLeapYear(t) );
+ }
+ if ( month == 3 ) {
+ return ( day - 89 - InLeapYear(t));
+ }
+ if ( month == 4 ) {
+ return ( day - 119 - InLeapYear(t));
+ }
+ if ( month == 5 ) {
+ return ( day - 150- InLeapYear(t));
+ }
+ if ( month == 6 ) {
+ return ( day - 180- InLeapYear(t));
+ }
+ if ( month == 7 ) {
+ return ( day - 211- InLeapYear(t));
+ }
+ if ( month == 8 ) {
+ return ( day - 242- InLeapYear(t));
+ }
+ if ( month == 9 ) {
+ return ( day - 272- InLeapYear(t));
+ }
+ if ( month == 10 ) {
+ return ( day - 303- InLeapYear(t));
+ }
+ if ( month == 11 ) {
+ return ( day - 333- InLeapYear(t));
+ }
+
+ return ("ERROR: DateFromTime("+t+") not known" );
+}
+function WeekDay( t ) {
+ var weekday = (Day(t)+4) % 7;
+ return( weekday < 0 ? 7 + weekday : weekday );
+}
+
+// missing daylight savings time adjustment
+
+function HourFromTime( t ) {
+ var h = Math.floor( t / msPerHour ) % HoursPerDay;
+ return ( (h<0) ? HoursPerDay + h : h );
+}
+function MinFromTime( t ) {
+ var min = Math.floor( t / msPerMinute ) % MinutesPerHour;
+ return( ( min < 0 ) ? MinutesPerHour + min : min );
+}
+function SecFromTime( t ) {
+ var sec = Math.floor( t / msPerSecond ) % SecondsPerMinute;
+ return ( (sec < 0 ) ? SecondsPerMinute + sec : sec );
+}
+function msFromTime( t ) {
+ var ms = t % msPerSecond;
+ return ( (ms < 0 ) ? msPerSecond + ms : ms );
+}
+function LocalTZA() {
+ return ( TZ_DIFF * msPerHour );
+}
+function UTC( t ) {
+ return ( t - LocalTZA() - DaylightSavingTA(t - LocalTZA()) );
+}
+
+function DaylightSavingTA( t ) {
+ t = t - LocalTZA();
+
+ var dst_start = GetDSTStart(t);
+ var dst_end = GetDSTEnd(t);
+
+ if ( t >= dst_start && t < dst_end )
+ return msPerHour;
+
+ return 0;
+}
+
+function GetFirstSundayInMonth( t, m ) {
+ var year = YearFromTime(t);
+ var leap = InLeapYear(t);
+
+// month m 0..11
+// april == 3
+// march == 2
+
+ // set time to first day of month m
+ var time = TimeFromYear(year);
+ for (var i = 0; i < m; ++i)
+ {
+ time += TimeInMonth(i, leap);
+ }
+
+ for ( var first_sunday = time; WeekDay(first_sunday) > 0;
+ first_sunday += msPerDay )
+ {
+ ;
+ }
+
+ return first_sunday;
+}
+
+function GetLastSundayInMonth( t, m ) {
+ var year = YearFromTime(t);
+ var leap = InLeapYear(t);
+
+// month m 0..11
+// april == 3
+// march == 2
+
+ // first day of following month
+ var time = TimeFromYear(year);
+ for (var i = 0; i <= m; ++i)
+ {
+ time += TimeInMonth(i, leap);
+ }
+ // prev day == last day of month
+ time -= msPerDay;
+
+ for ( var last_sunday = time; WeekDay(last_sunday) > 0;
+ last_sunday -= msPerDay )
+ {
+ ;
+ }
+ return last_sunday;
+}
+
+/*
+ 15.9.1.9 Daylight Saving Time Adjustment
+
+ The implementation of ECMAScript should not try to determine whether
+ the exact time was subject to daylight saving time, but just whether
+ daylight saving time would have been in effect if the current
+ daylight saving time algorithm had been used at the time. This avoids
+ complications such as taking into account the years that the locale
+ observed daylight saving time year round.
+*/
+
+/*
+ US DST algorithm
+
+ Before 2007, DST starts first Sunday in April at 2 AM and ends last
+ Sunday in October at 2 AM
+
+ Starting in 2007, DST starts second Sunday in March at 2 AM and ends
+ first Sunday in November at 2 AM
+
+ Note that different operating systems behave differently.
+
+ Fully patched Windows XP uses the 2007 algorithm for all dates while
+ fully patched Fedora Core 6 and RHEL 4 Linux use the algorithm in
+ effect at the time.
+
+ Since pre-2007 DST is a subset of 2007 DST rules, this only affects
+ tests that occur in the period Mar-Apr and Oct-Nov where the two
+ algorithms do not agree.
+
+*/
+
+function GetDSTStart( t )
+{
+ return (GetFirstSundayInMonth(t, 2) + 7*msPerDay + 2*msPerHour - LocalTZA());
+}
+
+function GetDSTEnd( t )
+{
+ return (GetFirstSundayInMonth(t, 10) + 2*msPerHour - LocalTZA());
+}
+
+function GetOldDSTStart( t )
+{
+ return (GetFirstSundayInMonth(t, 3) + 2*msPerHour - LocalTZA());
+}
+
+function GetOldDSTEnd( t )
+{
+ return (GetLastSundayInMonth(t, 9) + 2*msPerHour - LocalTZA());
+}
+
+function LocalTime( t ) {
+ return ( t + LocalTZA() + DaylightSavingTA(t) );
+}
+function MakeTime( hour, min, sec, ms ) {
+ if ( isNaN( hour ) || isNaN( min ) || isNaN( sec ) || isNaN( ms ) ) {
+ return Number.NaN;
+ }
+
+ hour = ToInteger(hour);
+ min = ToInteger( min);
+ sec = ToInteger( sec);
+ ms = ToInteger( ms );
+
+ return( (hour*msPerHour) + (min*msPerMinute) +
+ (sec*msPerSecond) + ms );
+}
+function MakeDay( year, month, date ) {
+ if ( isNaN(year) || isNaN(month) || isNaN(date) ) {
+ return Number.NaN;
+ }
+ year = ToInteger(year);
+ month = ToInteger(month);
+ date = ToInteger(date );
+
+ var sign = ( year < 1970 ) ? -1 : 1;
+ var t = ( year < 1970 ) ? 1 : 0;
+ var y = ( year < 1970 ) ? 1969 : 1970;
+
+ var result5 = year + Math.floor( month/12 );
+ var result6 = month % 12;
+
+ if ( year < 1970 ) {
+ for ( y = 1969; y >= year; y += sign ) {
+ t += sign * TimeInYear(y);
+ }
+ } else {
+ for ( y = 1970 ; y < year; y += sign ) {
+ t += sign * TimeInYear(y);
+ }
+ }
+
+ var leap = InLeapYear( t );
+
+ for ( var m = 0; m < month; m++ ) {
+ t += TimeInMonth( m, leap );
+ }
+
+ if ( YearFromTime(t) != result5 ) {
+ return Number.NaN;
+ }
+ if ( MonthFromTime(t) != result6 ) {
+ return Number.NaN;
+ }
+ if ( DateFromTime(t) != 1 ) {
+ return Number.NaN;
+ }
+
+ return ( (Day(t)) + date - 1 );
+}
+function TimeInMonth( month, leap ) {
+ // september april june november
+ // jan 0 feb 1 mar 2 apr 3 may 4 june 5 jul 6
+ // aug 7 sep 8 oct 9 nov 10 dec 11
+
+ if ( month == 3 || month == 5 || month == 8 || month == 10 ) {
+ return ( 30*msPerDay );
+ }
+
+ // all the rest
+ if ( month == 0 || month == 2 || month == 4 || month == 6 ||
+ month == 7 || month == 9 || month == 11 ) {
+ return ( 31*msPerDay );
+ }
+
+ // save february
+ return ( (leap == 0) ? 28*msPerDay : 29*msPerDay );
+}
+function MakeDate( day, time ) {
+ if ( day == Number.POSITIVE_INFINITY ||
+ day == Number.NEGATIVE_INFINITY ) {
+ return Number.NaN;
+ }
+ if ( time == Number.POSITIVE_INFINITY ||
+ time == Number.NEGATIVE_INFINITY ) {
+ return Number.NaN;
+ }
+ return ( day * msPerDay ) + time;
+}
+function TimeClip( t ) {
+ if ( isNaN( t ) ) {
+ return ( Number.NaN );
+ }
+ if ( Math.abs( t ) > 8.64e15 ) {
+ return ( Number.NaN );
+ }
+
+ return ( ToInteger( t ) );
+}
+function ToInteger( t ) {
+ t = Number( t );
+
+ if ( isNaN( t ) ){
+ return ( Number.NaN );
+ }
+ if ( t == 0 || t == -0 ||
+ t == Number.POSITIVE_INFINITY || t == Number.NEGATIVE_INFINITY ) {
+ return 0;
+ }
+
+ var sign = ( t < 0 ) ? -1 : 1;
+
+ return ( sign * Math.floor( Math.abs( t ) ) );
+}
+function Enumerate ( o ) {
+ var p;
+ for ( p in o ) {
+ print( p +": " + o[p] );
+ }
+}
+
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