bulk move of code to src/ SERVER-4551

1 files changed, 2371 insertions, 0 deletions

diff --git a/src/third_party/js-1.7/jsdate.c b/src/third_party/js-1.7/jsdate.c
new file mode 100644
index 00000000000..9e6697f0fac
--- /dev/null
+++ b/src/third_party/js-1.7/jsdate.c
@@ -0,0 +1,2371 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Communicator client code, released
+ * March 31, 1998.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/*
+ * JS date methods.
+ */
+
+/*
+ * "For example, OS/360 devotes 26 bytes of the permanently
+ *  resident date-turnover routine to the proper handling of
+ *  December 31 on leap years (when it is Day 366).  That
+ *  might have been left to the operator."
+ *
+ * Frederick Brooks, 'The Second-System Effect'.
+ */
+
+#include "jsstddef.h"
+#include <ctype.h>
+#include <locale.h>
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include "jstypes.h"
+#include "jsprf.h"
+#include "prmjtime.h"
+#include "jsutil.h" /* Added by JSIFY */
+#include "jsapi.h"
+#include "jsconfig.h"
+#include "jscntxt.h"
+#include "jsdate.h"
+#include "jsinterp.h"
+#include "jsnum.h"
+#include "jsobj.h"
+#include "jsstr.h"
+
+/*
+ * The JS 'Date' object is patterned after the Java 'Date' object.
+ * Here is an script:
+ *
+ *    today = new Date();
+ *
+ *    print(today.toLocaleString());
+ *
+ *    weekDay = today.getDay();
+ *
+ *
+ * These Java (and ECMA-262) methods are supported:
+ *
+ *     UTC
+ *     getDate (getUTCDate)
+ *     getDay (getUTCDay)
+ *     getHours (getUTCHours)
+ *     getMinutes (getUTCMinutes)
+ *     getMonth (getUTCMonth)
+ *     getSeconds (getUTCSeconds)
+ *     getMilliseconds (getUTCMilliseconds)
+ *     getTime
+ *     getTimezoneOffset
+ *     getYear
+ *     getFullYear (getUTCFullYear)
+ *     parse
+ *     setDate (setUTCDate)
+ *     setHours (setUTCHours)
+ *     setMinutes (setUTCMinutes)
+ *     setMonth (setUTCMonth)
+ *     setSeconds (setUTCSeconds)
+ *     setMilliseconds (setUTCMilliseconds)
+ *     setTime
+ *     setYear (setFullYear, setUTCFullYear)
+ *     toGMTString (toUTCString)
+ *     toLocaleString
+ *     toString
+ *
+ *
+ * These Java methods are not supported
+ *
+ *     setDay
+ *     before
+ *     after
+ *     equals
+ *     hashCode
+ */
+
+/*
+ * 11/97 - jsdate.c has been rewritten to conform to the ECMA-262 language
+ * definition and reduce dependence on NSPR.  NSPR is used to get the current
+ * time in milliseconds, the time zone offset, and the daylight savings time
+ * offset for a given time.  NSPR is also used for Date.toLocaleString(), for
+ * locale-specific formatting, and to get a string representing the timezone.
+ * (Which turns out to be platform-dependent.)
+ *
+ * To do:
+ * (I did some performance tests by timing how long it took to run what
+ *  I had of the js ECMA conformance tests.)
+ *
+ * - look at saving results across multiple calls to supporting
+ * functions; the toString functions compute some of the same values
+ * multiple times.  Although - I took a quick stab at this, and I lost
+ * rather than gained.  (Fractionally.)  Hard to tell what compilers/processors
+ * are doing these days.
+ *
+ * - look at tweaking function return types to return double instead
+ * of int; this seems to make things run slightly faster sometimes.
+ * (though it could be architecture-dependent.)  It'd be good to see
+ * how this does on win32.  (Tried it on irix.)  Types could use a
+ * general going-over.
+ */
+
+/*
+ * Supporting functions - ECMA 15.9.1.*
+ */
+
+#define HalfTimeDomain  8.64e15
+#define HoursPerDay     24.0
+#define MinutesPerDay   (HoursPerDay * MinutesPerHour)
+#define MinutesPerHour  60.0
+#define SecondsPerDay   (MinutesPerDay * SecondsPerMinute)
+#define SecondsPerHour  (MinutesPerHour * SecondsPerMinute)
+#define SecondsPerMinute 60.0
+
+#if defined(XP_WIN) || defined(XP_OS2)
+/* Work around msvc double optimization bug by making these runtime values; if
+ * they're available at compile time, msvc optimizes division by them by
+ * computing the reciprocal and multiplying instead of dividing - this loses
+ * when the reciprocal isn't representable in a double.
+ */
+static jsdouble msPerSecond = 1000.0;
+static jsdouble msPerDay = SecondsPerDay * 1000.0;
+static jsdouble msPerHour = SecondsPerHour * 1000.0;
+static jsdouble msPerMinute = SecondsPerMinute * 1000.0;
+#else
+#define msPerDay        (SecondsPerDay * msPerSecond)
+#define msPerHour       (SecondsPerHour * msPerSecond)
+#define msPerMinute     (SecondsPerMinute * msPerSecond)
+#define msPerSecond     1000.0
+#endif
+
+#define Day(t)          floor((t) / msPerDay)
+
+static jsdouble
+TimeWithinDay(jsdouble t)
+{
+    jsdouble result;
+    result = fmod(t, msPerDay);
+    if (result < 0)
+        result += msPerDay;
+    return result;
+}
+
+#define DaysInYear(y)   ((y) % 4 == 0 && ((y) % 100 || ((y) % 400 == 0))  \
+                         ? 366 : 365)
+
+/* math here has to be f.p, because we need
+ *  floor((1968 - 1969) / 4) == -1
+ */
+#define DayFromYear(y)  (365 * ((y)-1970) + floor(((y)-1969)/4.0)            \
+                         - floor(((y)-1901)/100.0) + floor(((y)-1601)/400.0))
+#define TimeFromYear(y) (DayFromYear(y) * msPerDay)
+
+static jsint
+YearFromTime(jsdouble t)
+{
+    jsint y = (jsint) floor(t /(msPerDay*365.2425)) + 1970;
+    jsdouble t2 = (jsdouble) TimeFromYear(y);
+
+    if (t2 > t) {
+        y--;
+    } else {
+        if (t2 + msPerDay * DaysInYear(y) <= t)
+            y++;
+    }
+    return y;
+}
+
+#define InLeapYear(t)   (JSBool) (DaysInYear(YearFromTime(t)) == 366)
+
+#define DayWithinYear(t, year) ((intN) (Day(t) - DayFromYear(year)))
+
+/*
+ * The following array contains the day of year for the first day of
+ * each month, where index 0 is January, and day 0 is January 1.
+ */
+static jsdouble firstDayOfMonth[2][12] = {
+    {0.0, 31.0, 59.0, 90.0, 120.0, 151.0, 181.0, 212.0, 243.0, 273.0, 304.0, 334.0},
+    {0.0, 31.0, 60.0, 91.0, 121.0, 152.0, 182.0, 213.0, 244.0, 274.0, 305.0, 335.0}
+};
+
+#define DayFromMonth(m, leap) firstDayOfMonth[leap][(intN)m];
+
+static intN
+MonthFromTime(jsdouble t)
+{
+    intN d, step;
+    jsint year = YearFromTime(t);
+    d = DayWithinYear(t, year);
+
+    if (d < (step = 31))
+        return 0;
+    step += (InLeapYear(t) ? 29 : 28);
+    if (d < step)
+        return 1;
+    if (d < (step += 31))
+        return 2;
+    if (d < (step += 30))
+        return 3;
+    if (d < (step += 31))
+        return 4;
+    if (d < (step += 30))
+        return 5;
+    if (d < (step += 31))
+        return 6;
+    if (d < (step += 31))
+        return 7;
+    if (d < (step += 30))
+        return 8;
+    if (d < (step += 31))
+        return 9;
+    if (d < (step += 30))
+        return 10;
+    return 11;
+}
+
+static intN
+DateFromTime(jsdouble t)
+{
+    intN d, step, next;
+    jsint year = YearFromTime(t);
+    d = DayWithinYear(t, year);
+
+    if (d <= (next = 30))
+        return d + 1;
+    step = next;
+    next += (InLeapYear(t) ? 29 : 28);
+    if (d <= next)
+        return d - step;
+    step = next;
+    if (d <= (next += 31))
+        return d - step;
+    step = next;
+    if (d <= (next += 30))
+        return d - step;
+    step = next;
+    if (d <= (next += 31))
+        return d - step;
+    step = next;
+    if (d <= (next += 30))
+        return d - step;
+    step = next;
+    if (d <= (next += 31))
+        return d - step;
+    step = next;
+    if (d <= (next += 31))
+        return d - step;
+    step = next;
+    if (d <= (next += 30))
+        return d - step;
+    step = next;
+    if (d <= (next += 31))
+        return d - step;
+    step = next;
+    if (d <= (next += 30))
+        return d - step;
+    step = next;
+    return d - step;
+}
+
+static intN
+WeekDay(jsdouble t)
+{
+    jsint result;
+    result = (jsint) Day(t) + 4;
+    result = result % 7;
+    if (result < 0)
+        result += 7;
+    return (intN) result;
+}
+
+#define MakeTime(hour, min, sec, ms) \
+((((hour) * MinutesPerHour + (min)) * SecondsPerMinute + (sec)) * msPerSecond + (ms))
+
+static jsdouble
+MakeDay(jsdouble year, jsdouble month, jsdouble date)
+{
+    JSBool leap;
+    jsdouble yearday;
+    jsdouble monthday;
+
+    year += floor(month / 12);
+
+    month = fmod(month, 12.0);
+    if (month < 0)
+        month += 12;
+
+    leap = (DaysInYear((jsint) year) == 366);
+
+    yearday = floor(TimeFromYear(year) / msPerDay);
+    monthday = DayFromMonth(month, leap);
+
+    return yearday + monthday + date - 1;
+}
+
+#define MakeDate(day, time) ((day) * msPerDay + (time))
+
+/*
+ * Years and leap years on which Jan 1 is a Sunday, Monday, etc.
+ *
+ * yearStartingWith[0][i] is an example non-leap year where
+ * Jan 1 appears on Sunday (i == 0), Monday (i == 1), etc.
+ *
+ * yearStartingWith[1][i] is an example leap year where
+ * Jan 1 appears on Sunday (i == 0), Monday (i == 1), etc.
+ */
+static jsint yearStartingWith[2][7] = {
+    {1978, 1973, 1974, 1975, 1981, 1971, 1977},
+    {1984, 1996, 1980, 1992, 1976, 1988, 1972}
+};
+
+/*
+ * Find a year for which any given date will fall on the same weekday.
+ *
+ * This function should be used with caution when used other than
+ * for determining DST; it hasn't been proven not to produce an
+ * incorrect year for times near year boundaries.
+ */
+static jsint
+EquivalentYearForDST(jsint year)
+{
+    jsint day;
+    JSBool isLeapYear;
+
+    day = (jsint) DayFromYear(year) + 4;
+    day = day % 7;
+    if (day < 0)
+        day += 7;
+
+    isLeapYear = (DaysInYear(year) == 366);
+
+    return yearStartingWith[isLeapYear][day];
+}
+
+/* LocalTZA gets set by js_InitDateClass() */
+static jsdouble LocalTZA;
+
+static jsdouble
+DaylightSavingTA(jsdouble t)
+{
+    volatile int64 PR_t;
+    int64 ms2us;
+    int64 offset;
+    jsdouble result;
+
+    /* abort if NaN */
+    if (JSDOUBLE_IS_NaN(t))
+        return t;
+
+    /*
+     * If earlier than 1970 or after 2038, potentially beyond the ken of
+     * many OSes, map it to an equivalent year before asking.
+     */
+    if (t < 0.0 || t > 2145916800000.0) {
+        jsint year;
+        jsdouble day;
+
+        year = EquivalentYearForDST(YearFromTime(t));
+        day = MakeDay(year, MonthFromTime(t), DateFromTime(t));
+        t = MakeDate(day, TimeWithinDay(t));
+    }
+
+    /* put our t in an LL, and map it to usec for prtime */
+    JSLL_D2L(PR_t, t);
+    JSLL_I2L(ms2us, PRMJ_USEC_PER_MSEC);
+    JSLL_MUL(PR_t, PR_t, ms2us);
+
+    offset = PRMJ_DSTOffset(PR_t);
+
+    JSLL_DIV(offset, offset, ms2us);
+    JSLL_L2D(result, offset);
+    return result;
+}
+
+
+#define AdjustTime(t)   fmod(LocalTZA + DaylightSavingTA(t), msPerDay)
+
+#define LocalTime(t)    ((t) + AdjustTime(t))
+
+static jsdouble
+UTC(jsdouble t)
+{
+    return t - AdjustTime(t - LocalTZA);
+}
+
+static intN
+HourFromTime(jsdouble t)
+{
+    intN result = (intN) fmod(floor(t/msPerHour), HoursPerDay);
+    if (result < 0)
+        result += (intN)HoursPerDay;
+    return result;
+}
+
+static intN
+MinFromTime(jsdouble t)
+{
+    intN result = (intN) fmod(floor(t / msPerMinute), MinutesPerHour);
+    if (result < 0)
+        result += (intN)MinutesPerHour;
+    return result;
+}
+
+static intN
+SecFromTime(jsdouble t)
+{
+    intN result = (intN) fmod(floor(t / msPerSecond), SecondsPerMinute);
+    if (result < 0)
+        result += (intN)SecondsPerMinute;
+    return result;
+}
+
+static intN
+msFromTime(jsdouble t)
+{
+    intN result = (intN) fmod(t, msPerSecond);
+    if (result < 0)
+        result += (intN)msPerSecond;
+    return result;
+}
+
+#define TIMECLIP(d) ((JSDOUBLE_IS_FINITE(d) \
+                      && !((d < 0 ? -d : d) > HalfTimeDomain)) \
+                     ? js_DoubleToInteger(d + (+0.)) : *cx->runtime->jsNaN)
+
+/**
+ * end of ECMA 'support' functions
+ */
+
+/*
+ * Other Support routines and definitions
+ */
+
+JSClass js_DateClass = {
+    js_Date_str,
+    JSCLASS_HAS_PRIVATE | JSCLASS_HAS_CACHED_PROTO(JSProto_Date),
+    JS_PropertyStub,  JS_PropertyStub,  JS_PropertyStub,  JS_PropertyStub,
+    JS_EnumerateStub, JS_ResolveStub,   JS_ConvertStub,   JS_FinalizeStub,
+    JSCLASS_NO_OPTIONAL_MEMBERS
+};
+
+/* for use by date_parse */
+
+static const char* wtb[] = {
+    "am", "pm",
+    "monday", "tuesday", "wednesday", "thursday", "friday",
+    "saturday", "sunday",
+    "january", "february", "march", "april", "may", "june",
+    "july", "august", "september", "october", "november", "december",
+    "gmt", "ut", "utc",
+    "est", "edt",
+    "cst", "cdt",
+    "mst", "mdt",
+    "pst", "pdt"
+    /* time zone table needs to be expanded */
+};
+
+static int ttb[] = {
+    -1, -2, 0, 0, 0, 0, 0, 0, 0,       /* AM/PM */
+    2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
+    10000 + 0, 10000 + 0, 10000 + 0,   /* GMT/UT/UTC */
+    10000 + 5 * 60, 10000 + 4 * 60,    /* EST/EDT */
+    10000 + 6 * 60, 10000 + 5 * 60,    /* CST/CDT */
+    10000 + 7 * 60, 10000 + 6 * 60,    /* MST/MDT */
+    10000 + 8 * 60, 10000 + 7 * 60     /* PST/PDT */
+};
+
+/* helper for date_parse */
+static JSBool
+date_regionMatches(const char* s1, int s1off, const jschar* s2, int s2off,
+                   int count, int ignoreCase)
+{
+    JSBool result = JS_FALSE;
+    /* return true if matches, otherwise, false */
+
+    while (count > 0 && s1[s1off] && s2[s2off]) {
+        if (ignoreCase) {
+            if (JS_TOLOWER((jschar)s1[s1off]) != JS_TOLOWER(s2[s2off])) {
+                break;
+            }
+        } else {
+            if ((jschar)s1[s1off] != s2[s2off]) {
+                break;
+            }
+        }
+        s1off++;
+        s2off++;
+        count--;
+    }
+
+    if (count == 0) {
+        result = JS_TRUE;
+    }
+
+    return result;
+}
+
+/* find UTC time from given date... no 1900 correction! */
+static jsdouble
+date_msecFromDate(jsdouble year, jsdouble mon, jsdouble mday, jsdouble hour,
+                  jsdouble min, jsdouble sec, jsdouble msec)
+{
+    jsdouble day;
+    jsdouble msec_time;
+    jsdouble result;
+
+    day = MakeDay(year, mon, mday);
+    msec_time = MakeTime(hour, min, sec, msec);
+    result = MakeDate(day, msec_time);
+    return result;
+}
+
+/*
+ * See ECMA 15.9.4.[3-10];
+ */
+/* XXX this function must be above date_parseString to avoid a
+   horrid bug in the Win16 1.52 compiler */
+#define MAXARGS        7
+static JSBool
+date_UTC(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+    jsdouble array[MAXARGS];
+    uintN loop;
+    jsdouble d;
+
+    for (loop = 0; loop < MAXARGS; loop++) {
+        if (loop < argc) {
+            if (!js_ValueToNumber(cx, argv[loop], &d))
+                return JS_FALSE;
+            /* return NaN if any arg is NaN */
+            if (!JSDOUBLE_IS_FINITE(d)) {
+                return js_NewNumberValue(cx, d, rval);
+            }
+            array[loop] = floor(d);
+        } else {
+            array[loop] = 0;
+        }
+    }
+
+    /* adjust 2-digit years into the 20th century */
+    if (array[0] >= 0 && array[0] <= 99)
+        array[0] += 1900;
+
+    /* if we got a 0 for 'date' (which is out of range)
+     * pretend it's a 1.  (So Date.UTC(1972, 5) works) */
+    if (array[2] < 1)
+        array[2] = 1;
+
+    d = date_msecFromDate(array[0], array[1], array[2],
+                              array[3], array[4], array[5], array[6]);
+    d = TIMECLIP(d);
+
+    return js_NewNumberValue(cx, d, rval);
+}
+
+static JSBool
+date_parseString(JSString *str, jsdouble *result)
+{
+    jsdouble msec;
+
+    const jschar *s = JSSTRING_CHARS(str);
+    size_t limit = JSSTRING_LENGTH(str);
+    size_t i = 0;
+    int year = -1;
+    int mon = -1;
+    int mday = -1;
+    int hour = -1;
+    int min = -1;
+    int sec = -1;
+    int c = -1;
+    int n = -1;
+    jsdouble tzoffset = -1;  /* was an int, overflowed on win16!!! */
+    int prevc = 0;
+    JSBool seenplusminus = JS_FALSE;
+    int temp;
+    JSBool seenmonthname = JS_FALSE;
+
+    if (limit == 0)
+        goto syntax;
+    while (i < limit) {
+        c = s[i];
+        i++;
+        if (c <= ' ' || c == ',' || c == '-') {
+            if (c == '-' && '0' <= s[i] && s[i] <= '9') {
+              prevc = c;
+            }
+            continue;
+        }
+        if (c == '(') { /* comments) */
+            int depth = 1;
+            while (i < limit) {
+                c = s[i];
+                i++;
+                if (c == '(') depth++;
+                else if (c == ')')
+                    if (--depth <= 0)
+                        break;
+            }
+            continue;
+        }
+        if ('0' <= c && c <= '9') {
+            n = c - '0';
+            while (i < limit && '0' <= (c = s[i]) && c <= '9') {
+                n = n * 10 + c - '0';
+                i++;
+            }
+
+            /* allow TZA before the year, so
+             * 'Wed Nov 05 21:49:11 GMT-0800 1997'
+             * works */
+
+            /* uses of seenplusminus allow : in TZA, so Java
+             * no-timezone style of GMT+4:30 works
+             */
+
+            if ((prevc == '+' || prevc == '-')/*  && year>=0 */) {
+                /* make ':' case below change tzoffset */
+                seenplusminus = JS_TRUE;
+
+                /* offset */
+                if (n < 24)
+                    n = n * 60; /* EG. "GMT-3" */
+                else
+                    n = n % 100 + n / 100 * 60; /* eg "GMT-0430" */
+                if (prevc == '+')       /* plus means east of GMT */
+                    n = -n;
+                if (tzoffset != 0 && tzoffset != -1)
+                    goto syntax;
+                tzoffset = n;
+            } else if (prevc == '/' && mon >= 0 && mday >= 0 && year < 0) {
+                if (c <= ' ' || c == ',' || c == '/' || i >= limit)
+                    year = n;
+                else
+                    goto syntax;
+            } else if (c == ':') {
+                if (hour < 0)
+                    hour = /*byte*/ n;
+                else if (min < 0)
+                    min = /*byte*/ n;
+                else
+                    goto syntax;
+            } else if (c == '/') {
+                /* until it is determined that mon is the actual
+                   month, keep it as 1-based rather than 0-based */
+                if (mon < 0)
+                    mon = /*byte*/ n;
+                else if (mday < 0)
+                    mday = /*byte*/ n;
+                else
+                    goto syntax;
+            } else if (i < limit && c != ',' && c > ' ' && c != '-' && c != '(') {
+                goto syntax;
+            } else if (seenplusminus && n < 60) {  /* handle GMT-3:30 */
+                if (tzoffset < 0)
+                    tzoffset -= n;
+                else
+                    tzoffset += n;
+            } else if (hour >= 0 && min < 0) {
+                min = /*byte*/ n;
+            } else if (prevc == ':' && min >= 0 && sec < 0) {
+                sec = /*byte*/ n;
+            } else if (mon < 0) {
+                mon = /*byte*/n;
+            } else if (mon >= 0 && mday < 0) {
+                mday = /*byte*/ n;
+            } else if (mon >= 0 && mday >= 0 && year < 0) {
+                year = n;
+            } else {
+                goto syntax;
+            }
+            prevc = 0;
+        } else if (c == '/' || c == ':' || c == '+' || c == '-') {
+            prevc = c;
+        } else {
+            size_t st = i - 1;
+            int k;
+            while (i < limit) {
+                c = s[i];
+                if (!(('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z')))
+                    break;
+                i++;
+            }
+            if (i <= st + 1)
+                goto syntax;
+            for (k = (sizeof(wtb)/sizeof(char*)); --k >= 0;)
+                if (date_regionMatches(wtb[k], 0, s, st, i-st, 1)) {
+                    int action = ttb[k];
+                    if (action != 0) {
+                        if (action < 0) {
+                            /*
+                             * AM/PM. Count 12:30 AM as 00:30, 12:30 PM as
+                             * 12:30, instead of blindly adding 12 if PM.
+                             */
+                            JS_ASSERT(action == -1 || action == -2);
+                            if (hour > 12 || hour < 0) {
+                                goto syntax;
+                            } else {
+                                if (action == -1 && hour == 12) { /* am */
+                                    hour = 0;
+                                } else if (action == -2 && hour != 12) { /* pm */
+                                    hour += 12;
+                                }
+                            }
+                        } else if (action <= 13) { /* month! */
+                            /* Adjust mon to be 1-based until the final values
+                               for mon, mday and year are adjusted below */
+                            if (seenmonthname) {
+                                goto syntax;
+                            }
+                            seenmonthname = JS_TRUE;
+                            temp = /*byte*/ (action - 2) + 1;
+
+                            if (mon < 0) {
+                                mon = temp;
+                            } else if (mday < 0) {
+                                mday = mon;
+                                mon = temp;
+                            } else if (year < 0) {
+                                year = mon;
+                                mon = temp;
+                            } else {
+                                goto syntax;
+                            }
+                        } else {
+                            tzoffset = action - 10000;
+                        }
+                    }
+                    break;
+                }
+            if (k < 0)
+                goto syntax;
+            prevc = 0;
+        }
+    }
+    if (year < 0 || mon < 0 || mday < 0)
+        goto syntax;
+    /*
+      Case 1. The input string contains an English month name.
+              The form of the string can be month f l, or f month l, or
+              f l month which each evaluate to the same date.
+              If f and l are both greater than or equal to 70, or
+              both less than 70, the date is invalid.
+              The year is taken to be the greater of the values f, l.
+              If the year is greater than or equal to 70 and less than 100,
+              it is considered to be the number of years after 1900.
+      Case 2. The input string is of the form "f/m/l" where f, m and l are
+              integers, e.g. 7/16/45.
+              Adjust the mon, mday and year values to achieve 100% MSIE
+              compatibility.
+              a. If 0 <= f < 70, f/m/l is interpreted as month/day/year.
+                 i.  If year < 100, it is the number of years after 1900
+                 ii. If year >= 100, it is the number of years after 0.
+              b. If 70 <= f < 100
+                 i.  If m < 70, f/m/l is interpreted as
+                     year/month/day where year is the number of years after
+                     1900.
+                 ii. If m >= 70, the date is invalid.
+              c. If f >= 100
+                 i.  If m < 70, f/m/l is interpreted as
+                     year/month/day where year is the number of years after 0.
+                 ii. If m >= 70, the date is invalid.
+    */
+    if (seenmonthname) {
+        if ((mday >= 70 && year >= 70) || (mday < 70 && year < 70)) {
+            goto syntax;
+        }
+        if (mday > year) {
+            temp = year;
+            year = mday;
+            mday = temp;
+        }
+        if (year >= 70 && year < 100) {
+            year += 1900;
+        }
+    } else if (mon < 70) { /* (a) month/day/year */
+        if (year < 100) {
+            year += 1900;
+        }
+    } else if (mon < 100) { /* (b) year/month/day */
+        if (mday < 70) {
+            temp = year;
+            year = mon + 1900;
+            mon = mday;
+            mday = temp;
+        } else {
+            goto syntax;
+        }
+    } else { /* (c) year/month/day */
+        if (mday < 70) {
+            temp = year;
+            year = mon;
+            mon = mday;
+            mday = temp;
+        } else {
+            goto syntax;
+        }
+    }
+    mon -= 1; /* convert month to 0-based */
+    if (sec < 0)
+        sec = 0;
+    if (min < 0)
+        min = 0;
+    if (hour < 0)
+        hour = 0;
+    if (tzoffset == -1) { /* no time zone specified, have to use local */
+        jsdouble msec_time;
+        msec_time = date_msecFromDate(year, mon, mday, hour, min, sec, 0);
+
+        *result = UTC(msec_time);
+        return JS_TRUE;
+    }
+
+    msec = date_msecFromDate(year, mon, mday, hour, min, sec, 0);
+    msec += tzoffset * msPerMinute;
+    *result = msec;
+    return JS_TRUE;
+
+syntax:
+    /* syntax error */
+    *result = 0;
+    return JS_FALSE;
+}
+
+static JSBool
+date_parse(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+    JSString *str;
+    jsdouble result;
+
+    str = js_ValueToString(cx, argv[0]);
+    if (!str)
+        return JS_FALSE;
+    if (!date_parseString(str, &result)) {
+        *rval = DOUBLE_TO_JSVAL(cx->runtime->jsNaN);
+        return JS_TRUE;
+    }
+
+    result = TIMECLIP(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_now(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+    int64 us, ms, us2ms;
+    jsdouble msec_time;
+
+    us = PRMJ_Now();
+    JSLL_UI2L(us2ms, PRMJ_USEC_PER_MSEC);
+    JSLL_DIV(ms, us, us2ms);
+    JSLL_L2D(msec_time, ms);
+
+    return js_NewDoubleValue(cx, msec_time, rval);
+}
+
+/*
+ * Check that obj is an object of class Date, and get the date value.
+ * Return NULL on failure.
+ */
+static jsdouble *
+date_getProlog(JSContext *cx, JSObject *obj, jsval *argv)
+{
+    if (!JS_InstanceOf(cx, obj, &js_DateClass, argv))
+        return NULL;
+    return JSVAL_TO_DOUBLE(OBJ_GET_SLOT(cx, obj, JSSLOT_PRIVATE));
+}
+
+/*
+ * See ECMA 15.9.5.4 thru 15.9.5.23
+ */
+static JSBool
+date_getTime(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+
+    return js_NewNumberValue(cx, *date, rval);
+}
+
+static JSBool
+date_getYear(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+    jsdouble *date;
+    jsdouble result;
+
+    date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+
+    result = *date;
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = YearFromTime(LocalTime(result));
+
+    /* Follow ECMA-262 to the letter, contrary to IE JScript. */
+    result -= 1900;
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getFullYear(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                 jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = YearFromTime(LocalTime(result));
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getUTCFullYear(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                    jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = YearFromTime(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getMonth(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+              jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = MonthFromTime(LocalTime(result));
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getUTCMonth(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                 jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = MonthFromTime(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getDate(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = LocalTime(result);
+    result = DateFromTime(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getUTCDate(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = DateFromTime(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getDay(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = LocalTime(result);
+    result = WeekDay(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getUTCDay(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+               jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = WeekDay(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getHours(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+              jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = HourFromTime(LocalTime(result));
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getUTCHours(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                 jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = HourFromTime(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getMinutes(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = MinFromTime(LocalTime(result));
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getUTCMinutes(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                   jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = MinFromTime(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+/* Date.getSeconds is mapped to getUTCSeconds */
+
+static JSBool
+date_getUTCSeconds(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = SecFromTime(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+/* Date.getMilliseconds is mapped to getUTCMilliseconds */
+
+static JSBool
+date_getUTCMilliseconds(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                     jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    result = msFromTime(result);
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_getTimezoneOffset(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                       jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    result = *date;
+
+    /*
+     * Return the time zone offset in minutes for the current locale
+     * that is appropriate for this time. This value would be a
+     * constant except for daylight savings time.
+     */
+    result = (result - LocalTime(result)) / msPerMinute;
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_setTime(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+    jsdouble result;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+
+    if (!js_ValueToNumber(cx, argv[0], &result))
+        return JS_FALSE;
+
+    result = TIMECLIP(result);
+
+    *date = result;
+    return js_NewNumberValue(cx, result, rval);
+}
+
+static JSBool
+date_makeTime(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+              uintN maxargs, JSBool local, jsval *rval)
+{
+    uintN i;
+    jsdouble args[4], *argp, *stop;
+    jsdouble hour, min, sec, msec;
+    jsdouble lorutime; /* Local or UTC version of *date */
+
+    jsdouble msec_time;
+    jsdouble result;
+
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+
+    result = *date;
+
+    /* just return NaN if the date is already NaN */
+    if (!JSDOUBLE_IS_FINITE(result))
+        return js_NewNumberValue(cx, result, rval);
+
+    /* Satisfy the ECMA rule that if a function is called with
+     * fewer arguments than the specified formal arguments, the
+     * remaining arguments are set to undefined.  Seems like all
+     * the Date.setWhatever functions in ECMA are only varargs
+     * beyond the first argument; this should be set to undefined
+     * if it's not given.  This means that "d = new Date();
+     * d.setMilliseconds()" returns NaN.  Blech.
+     */
+    if (argc == 0)
+        argc = 1;   /* should be safe, because length of all setters is 1 */
+    else if (argc > maxargs)
+        argc = maxargs;  /* clamp argc */
+
+    for (i = 0; i < argc; i++) {
+        if (!js_ValueToNumber(cx, argv[i], &args[i]))
+            return JS_FALSE;
+        if (!JSDOUBLE_IS_FINITE(args[i])) {
+            *date = *cx->runtime->jsNaN;
+            return js_NewNumberValue(cx, *date, rval);
+        }
+        args[i] = js_DoubleToInteger(args[i]);
+    }
+
+    if (local)
+        lorutime = LocalTime(result);
+    else
+        lorutime = result;
+
+    argp = args;
+    stop = argp + argc;
+    if (maxargs >= 4 && argp < stop)
+        hour = *argp++;
+    else
+        hour = HourFromTime(lorutime);
+
+    if (maxargs >= 3 && argp < stop)
+        min = *argp++;
+    else
+        min = MinFromTime(lorutime);
+
+    if (maxargs >= 2 && argp < stop)
+        sec = *argp++;
+    else
+        sec = SecFromTime(lorutime);
+
+    if (maxargs >= 1 && argp < stop)
+        msec = *argp;
+    else
+        msec = msFromTime(lorutime);
+
+    msec_time = MakeTime(hour, min, sec, msec);
+    result = MakeDate(Day(lorutime), msec_time);
+
+/*     fprintf(stderr, "%f\n", result); */
+
+    if (local)
+        result = UTC(result);
+
+/*     fprintf(stderr, "%f\n", result); */
+
+    *date = TIMECLIP(result);
+    return js_NewNumberValue(cx, *date, rval);
+}
+
+static JSBool
+date_setMilliseconds(JSContext *cx, JSObject *obj, uintN argc,
+                     jsval *argv, jsval *rval)
+{
+    return date_makeTime(cx, obj, argc, argv, 1, JS_TRUE, rval);
+}
+
+static JSBool
+date_setUTCMilliseconds(JSContext *cx, JSObject *obj, uintN argc,
+                        jsval *argv, jsval *rval)
+{
+    return date_makeTime(cx, obj, argc, argv, 1, JS_FALSE, rval);
+}
+
+static JSBool
+date_setSeconds(JSContext *cx, JSObject *obj, uintN argc,
+                jsval *argv, jsval *rval)
+{
+    return date_makeTime(cx, obj, argc, argv, 2, JS_TRUE, rval);
+}
+
+static JSBool
+date_setUTCSeconds(JSContext *cx, JSObject *obj, uintN argc,
+                   jsval *argv, jsval *rval)
+{
+    return date_makeTime(cx, obj, argc, argv, 2, JS_FALSE, rval);
+}
+
+static JSBool
+date_setMinutes(JSContext *cx, JSObject *obj, uintN argc,
+                jsval *argv, jsval *rval)
+{
+    return date_makeTime(cx, obj, argc, argv, 3, JS_TRUE, rval);
+}
+
+static JSBool
+date_setUTCMinutes(JSContext *cx, JSObject *obj, uintN argc,
+                   jsval *argv, jsval *rval)
+{
+    return date_makeTime(cx, obj, argc, argv, 3, JS_FALSE, rval);
+}
+
+static JSBool
+date_setHours(JSContext *cx, JSObject *obj, uintN argc,
+              jsval *argv, jsval *rval)
+{
+    return date_makeTime(cx, obj, argc, argv, 4, JS_TRUE, rval);
+}
+
+static JSBool
+date_setUTCHours(JSContext *cx, JSObject *obj, uintN argc,
+                 jsval *argv, jsval *rval)
+{
+    return date_makeTime(cx, obj, argc, argv, 4, JS_FALSE, rval);
+}
+
+static JSBool
+date_makeDate(JSContext *cx, JSObject *obj, uintN argc,
+              jsval *argv, uintN maxargs, JSBool local, jsval *rval)
+{
+    uintN i;
+    jsdouble lorutime; /* local or UTC version of *date */
+    jsdouble args[3], *argp, *stop;
+    jsdouble year, month, day;
+    jsdouble result;
+
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+
+    result = *date;
+
+    /* see complaint about ECMA in date_MakeTime */
+    if (argc == 0)
+        argc = 1;   /* should be safe, because length of all setters is 1 */
+    else if (argc > maxargs)
+        argc = maxargs;   /* clamp argc */
+
+    for (i = 0; i < argc; i++) {
+        if (!js_ValueToNumber(cx, argv[i], &args[i]))
+            return JS_FALSE;
+        if (!JSDOUBLE_IS_FINITE(args[i])) {
+            *date = *cx->runtime->jsNaN;
+            return js_NewNumberValue(cx, *date, rval);
+        }
+        args[i] = js_DoubleToInteger(args[i]);
+    }
+
+    /* return NaN if date is NaN and we're not setting the year,
+     * If we are, use 0 as the time. */
+    if (!(JSDOUBLE_IS_FINITE(result))) {
+        if (maxargs < 3)
+            return js_NewNumberValue(cx, result, rval);
+        else
+            lorutime = +0.;
+    } else {
+        if (local)
+            lorutime = LocalTime(result);
+        else
+            lorutime = result;
+    }
+
+    argp = args;
+    stop = argp + argc;
+    if (maxargs >= 3 && argp < stop)
+        year = *argp++;
+    else
+        year = YearFromTime(lorutime);
+
+    if (maxargs >= 2 && argp < stop)
+        month = *argp++;
+    else
+        month = MonthFromTime(lorutime);
+
+    if (maxargs >= 1 && argp < stop)
+        day = *argp++;
+    else
+        day = DateFromTime(lorutime);
+
+    day = MakeDay(year, month, day); /* day within year */
+    result = MakeDate(day, TimeWithinDay(lorutime));
+
+    if (local)
+        result = UTC(result);
+
+    *date = TIMECLIP(result);
+    return js_NewNumberValue(cx, *date, rval);
+}
+
+static JSBool
+date_setDate(JSContext *cx, JSObject *obj, uintN argc,
+             jsval *argv, jsval *rval)
+{
+    return date_makeDate(cx, obj, argc, argv, 1, JS_TRUE, rval);
+}
+
+static JSBool
+date_setUTCDate(JSContext *cx, JSObject *obj, uintN argc,
+                jsval *argv, jsval *rval)
+{
+    return date_makeDate(cx, obj, argc, argv, 1, JS_FALSE, rval);
+}
+
+static JSBool
+date_setMonth(JSContext *cx, JSObject *obj, uintN argc,
+              jsval *argv, jsval *rval)
+{
+    return date_makeDate(cx, obj, argc, argv, 2, JS_TRUE, rval);
+}
+
+static JSBool
+date_setUTCMonth(JSContext *cx, JSObject *obj, uintN argc,
+                 jsval *argv, jsval *rval)
+{
+    return date_makeDate(cx, obj, argc, argv, 2, JS_FALSE, rval);
+}
+
+static JSBool
+date_setFullYear(JSContext *cx, JSObject *obj, uintN argc,
+                 jsval *argv, jsval *rval)
+{
+    return date_makeDate(cx, obj, argc, argv, 3, JS_TRUE, rval);
+}
+
+static JSBool
+date_setUTCFullYear(JSContext *cx, JSObject *obj, uintN argc,
+                    jsval *argv, jsval *rval)
+{
+    return date_makeDate(cx, obj, argc, argv, 3, JS_FALSE, rval);
+}
+
+static JSBool
+date_setYear(JSContext *cx, JSObject *obj, uintN argc,
+             jsval *argv, jsval *rval)
+{
+    jsdouble t;
+    jsdouble year;
+    jsdouble day;
+    jsdouble result;
+
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+
+    result = *date;
+
+    if (!js_ValueToNumber(cx, argv[0], &year))
+        return JS_FALSE;
+    if (!JSDOUBLE_IS_FINITE(year)) {
+        *date = *cx->runtime->jsNaN;
+        return js_NewNumberValue(cx, *date, rval);
+    }
+
+    year = js_DoubleToInteger(year);
+
+    if (!JSDOUBLE_IS_FINITE(result)) {
+        t = +0.0;
+    } else {
+        t = LocalTime(result);
+    }
+
+    if (year >= 0 && year <= 99)
+        year += 1900;
+
+    day = MakeDay(year, MonthFromTime(t), DateFromTime(t));
+    result = MakeDate(day, TimeWithinDay(t));
+    result = UTC(result);
+
+    *date = TIMECLIP(result);
+    return js_NewNumberValue(cx, *date, rval);
+}
+
+/* constants for toString, toUTCString */
+static char js_NaN_date_str[] = "Invalid Date";
+static const char* days[] =
+{
+   "Sun","Mon","Tue","Wed","Thu","Fri","Sat"
+};
+static const char* months[] =
+{
+   "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+};
+
+static JSBool
+date_toGMTString(JSContext *cx, JSObject *obj, uintN argc,
+                 jsval *argv, jsval *rval)
+{
+    char buf[100];
+    JSString *str;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+
+    if (!JSDOUBLE_IS_FINITE(*date)) {
+        JS_snprintf(buf, sizeof buf, js_NaN_date_str);
+    } else {
+        jsdouble temp = *date;
+
+        /* Avoid dependence on PRMJ_FormatTimeUSEnglish, because it
+         * requires a PRMJTime... which only has 16-bit years.  Sub-ECMA.
+         */
+        JS_snprintf(buf, sizeof buf, "%s, %.2d %s %.4d %.2d:%.2d:%.2d GMT",
+                    days[WeekDay(temp)],
+                    DateFromTime(temp),
+                    months[MonthFromTime(temp)],
+                    YearFromTime(temp),
+                    HourFromTime(temp),
+                    MinFromTime(temp),
+                    SecFromTime(temp));
+    }
+    str = JS_NewStringCopyZ(cx, buf);
+    if (!str)
+        return JS_FALSE;
+    *rval = STRING_TO_JSVAL(str);
+    return JS_TRUE;
+}
+
+/* for Date.toLocaleString; interface to PRMJTime date struct.
+ * If findEquivalent is true, then try to map the year to an equivalent year
+ * that's in range.
+ */
+static void
+new_explode(jsdouble timeval, PRMJTime *split, JSBool findEquivalent)
+{
+    jsint year = YearFromTime(timeval);
+    int16 adjustedYear;
+
+    /* If the year doesn't fit in a PRMJTime, find something to do about it. */
+    if (year > 32767 || year < -32768) {
+        if (findEquivalent) {
+            /* We're really just trying to get a timezone string; map the year
+             * to some equivalent year in the range 0 to 2800.  Borrowed from
+             * A. D. Olsen.
+             */
+            jsint cycles;
+#define CYCLE_YEARS 2800L
+            cycles = (year >= 0) ? year / CYCLE_YEARS
+                                 : -1 - (-1 - year) / CYCLE_YEARS;
+            adjustedYear = (int16)(year - cycles * CYCLE_YEARS);
+        } else {
+            /* Clamp it to the nearest representable year. */
+            adjustedYear = (int16)((year > 0) ? 32767 : - 32768);
+        }
+    } else {
+        adjustedYear = (int16)year;
+    }
+
+    split->tm_usec = (int32) msFromTime(timeval) * 1000;
+    split->tm_sec = (int8) SecFromTime(timeval);
+    split->tm_min = (int8) MinFromTime(timeval);
+    split->tm_hour = (int8) HourFromTime(timeval);
+    split->tm_mday = (int8) DateFromTime(timeval);
+    split->tm_mon = (int8) MonthFromTime(timeval);
+    split->tm_wday = (int8) WeekDay(timeval);
+    split->tm_year = (int16) adjustedYear;
+    split->tm_yday = (int16) DayWithinYear(timeval, year);
+
+    /* not sure how this affects things, but it doesn't seem
+       to matter. */
+    split->tm_isdst = (DaylightSavingTA(timeval) != 0);
+}
+
+typedef enum formatspec {
+    FORMATSPEC_FULL, FORMATSPEC_DATE, FORMATSPEC_TIME
+} formatspec;
+
+/* helper function */
+static JSBool
+date_format(JSContext *cx, jsdouble date, formatspec format, jsval *rval)
+{
+    char buf[100];
+    JSString *str;
+    char tzbuf[100];
+    JSBool usetz;
+    size_t i, tzlen;
+    PRMJTime split;
+
+    if (!JSDOUBLE_IS_FINITE(date)) {
+        JS_snprintf(buf, sizeof buf, js_NaN_date_str);
+    } else {
+        jsdouble local = LocalTime(date);
+
+        /* offset from GMT in minutes.  The offset includes daylight savings,
+           if it applies. */
+        jsint minutes = (jsint) floor(AdjustTime(date) / msPerMinute);
+
+        /* map 510 minutes to 0830 hours */
+        intN offset = (minutes / 60) * 100 + minutes % 60;
+
+        /* print as "Wed Nov 05 19:38:03 GMT-0800 (PST) 1997" The TZA is
+         * printed as 'GMT-0800' rather than as 'PST' to avoid
+         * operating-system dependence on strftime (which
+         * PRMJ_FormatTimeUSEnglish calls, for %Z only.)  win32 prints
+         * PST as 'Pacific Standard Time.'  This way we always know
+         * what we're getting, and can parse it if we produce it.
+         * The OS TZA string is included as a comment.
+         */
+
+        /* get a timezone string from the OS to include as a
+           comment. */
+        new_explode(date, &split, JS_TRUE);
+        if (PRMJ_FormatTime(tzbuf, sizeof tzbuf, "(%Z)", &split) != 0) {
+
+            /* Decide whether to use the resulting timezone string.
+             *
+             * Reject it if it contains any non-ASCII, non-alphanumeric
+             * characters.  It's then likely in some other character
+             * encoding, and we probably won't display it correctly.
+             */
+            usetz = JS_TRUE;
+            tzlen = strlen(tzbuf);
+            if (tzlen > 100) {
+                usetz = JS_FALSE;
+            } else {
+                for (i = 0; i < tzlen; i++) {
+                    jschar c = tzbuf[i];
+                    if (c > 127 ||
+                        !(isalpha(c) || isdigit(c) ||
+                          c == ' ' || c == '(' || c == ')')) {
+                        usetz = JS_FALSE;
+                    }
+                }
+            }
+
+            /* Also reject it if it's not parenthesized or if it's '()'. */
+            if (tzbuf[0] != '(' || tzbuf[1] == ')')
+                usetz = JS_FALSE;
+        } else
+            usetz = JS_FALSE;
+
+        switch (format) {
+          case FORMATSPEC_FULL:
+            /*
+             * Avoid dependence on PRMJ_FormatTimeUSEnglish, because it
+             * requires a PRMJTime... which only has 16-bit years.  Sub-ECMA.
+             */
+            /* Tue Oct 31 2000 09:41:40 GMT-0800 (PST) */
+            JS_snprintf(buf, sizeof buf,
+                        "%s %s %.2d %.4d %.2d:%.2d:%.2d GMT%+.4d%s%s",
+                        days[WeekDay(local)],
+                        months[MonthFromTime(local)],
+                        DateFromTime(local),
+                        YearFromTime(local),
+                        HourFromTime(local),
+                        MinFromTime(local),
+                        SecFromTime(local),
+                        offset,
+                        usetz ? " " : "",
+                        usetz ? tzbuf : "");
+            break;
+          case FORMATSPEC_DATE:
+            /* Tue Oct 31 2000 */
+            JS_snprintf(buf, sizeof buf,
+                        "%s %s %.2d %.4d",
+                        days[WeekDay(local)],
+                        months[MonthFromTime(local)],
+                        DateFromTime(local),
+                        YearFromTime(local));
+            break;
+          case FORMATSPEC_TIME:
+            /* 09:41:40 GMT-0800 (PST) */
+            JS_snprintf(buf, sizeof buf,
+                        "%.2d:%.2d:%.2d GMT%+.4d%s%s",
+                        HourFromTime(local),
+                        MinFromTime(local),
+                        SecFromTime(local),
+                        offset,
+                        usetz ? " " : "",
+                        usetz ? tzbuf : "");
+            break;
+        }
+    }
+
+    str = JS_NewStringCopyZ(cx, buf);
+    if (!str)
+        return JS_FALSE;
+    *rval = STRING_TO_JSVAL(str);
+    return JS_TRUE;
+}
+
+static JSBool
+date_toLocaleHelper(JSContext *cx, JSObject *obj, uintN argc,
+                    jsval *argv, jsval *rval, char *format)
+{
+    char buf[100];
+    JSString *str;
+    PRMJTime split;
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+
+    if (!JSDOUBLE_IS_FINITE(*date)) {
+        JS_snprintf(buf, sizeof buf, js_NaN_date_str);
+    } else {
+        intN result_len;
+        jsdouble local = LocalTime(*date);
+        new_explode(local, &split, JS_FALSE);
+
+        /* let PRMJTime format it.       */
+        result_len = PRMJ_FormatTime(buf, sizeof buf, format, &split);
+
+        /* If it failed, default to toString. */
+        if (result_len == 0)
+            return date_format(cx, *date, FORMATSPEC_FULL, rval);
+
+        /* Hacked check against undesired 2-digit year 00/00/00 form. */
+        if (strcmp(format, "%x") == 0 && result_len >= 6 &&
+            /* Format %x means use OS settings, which may have 2-digit yr, so
+               hack end of 3/11/22 or 11.03.22 or 11Mar22 to use 4-digit yr...*/
+            !isdigit(buf[result_len - 3]) &&
+            isdigit(buf[result_len - 2]) && isdigit(buf[result_len - 1]) &&
+            /* ...but not if starts with 4-digit year, like 2022/3/11. */
+            !(isdigit(buf[0]) && isdigit(buf[1]) &&
+              isdigit(buf[2]) && isdigit(buf[3]))) {
+            JS_snprintf(buf + (result_len - 2), (sizeof buf) - (result_len - 2),
+                        "%d", js_DateGetYear(cx, obj));
+        }
+
+    }
+
+    if (cx->localeCallbacks && cx->localeCallbacks->localeToUnicode)
+        return cx->localeCallbacks->localeToUnicode(cx, buf, rval);
+
+    str = JS_NewStringCopyZ(cx, buf);
+    if (!str)
+        return JS_FALSE;
+    *rval = STRING_TO_JSVAL(str);
+    return JS_TRUE;
+}
+
+static JSBool
+date_toLocaleString(JSContext *cx, JSObject *obj, uintN argc,
+                    jsval *argv, jsval *rval)
+{
+    /* Use '%#c' for windows, because '%c' is
+     * backward-compatible and non-y2k with msvc; '%#c' requests that a
+     * full year be used in the result string.
+     */
+    return date_toLocaleHelper(cx, obj, argc, argv, rval,
+#if defined(_WIN32) && !defined(__MWERKS__)
+                                   "%#c"
+#else
+                                   "%c"
+#endif
+                                   );
+}
+
+static JSBool
+date_toLocaleDateString(JSContext *cx, JSObject *obj, uintN argc,
+                    jsval *argv, jsval *rval)
+{
+    /* Use '%#x' for windows, because '%x' is
+     * backward-compatible and non-y2k with msvc; '%#x' requests that a
+     * full year be used in the result string.
+     */
+    return date_toLocaleHelper(cx, obj, argc, argv, rval,
+#if defined(_WIN32) && !defined(__MWERKS__)
+                                   "%#x"
+#else
+                                   "%x"
+#endif
+                                   );
+}
+
+static JSBool
+date_toLocaleTimeString(JSContext *cx, JSObject *obj, uintN argc,
+                        jsval *argv, jsval *rval)
+{
+    return date_toLocaleHelper(cx, obj, argc, argv, rval, "%X");
+}
+
+static JSBool
+date_toLocaleFormat(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+                    jsval *rval)
+{
+    JSString *fmt;
+
+    if (argc == 0)
+        return date_toLocaleString(cx, obj, argc, argv, rval);
+
+    fmt = JS_ValueToString(cx, argv[0]);
+    if (!fmt)
+        return JS_FALSE;
+
+    return date_toLocaleHelper(cx, obj, argc, argv, rval,
+                               JS_GetStringBytes(fmt));
+}
+
+static JSBool
+date_toTimeString(JSContext *cx, JSObject *obj, uintN argc,
+                  jsval *argv, jsval *rval)
+{
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    return date_format(cx, *date, FORMATSPEC_TIME, rval);
+}
+
+static JSBool
+date_toDateString(JSContext *cx, JSObject *obj, uintN argc,
+                  jsval *argv, jsval *rval)
+{
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    return date_format(cx, *date, FORMATSPEC_DATE, rval);
+}
+
+#if JS_HAS_TOSOURCE
+#include <string.h>
+#include "jsdtoa.h"
+
+static JSBool
+date_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+              jsval *rval)
+{
+    jsdouble *date;
+    char buf[DTOSTR_STANDARD_BUFFER_SIZE], *numStr, *bytes;
+    JSString *str;
+
+    date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+
+    numStr = JS_dtostr(buf, sizeof buf, DTOSTR_STANDARD, 0, *date);
+    if (!numStr) {
+        JS_ReportOutOfMemory(cx);
+        return JS_FALSE;
+    }
+
+    bytes = JS_smprintf("(new %s(%s))", js_Date_str, numStr);
+    if (!bytes) {
+        JS_ReportOutOfMemory(cx);
+        return JS_FALSE;
+    }
+
+    str = JS_NewString(cx, bytes, strlen(bytes));
+    if (!str) {
+        free(bytes);
+        return JS_FALSE;
+    }
+    *rval = STRING_TO_JSVAL(str);
+    return JS_TRUE;
+}
+#endif
+
+static JSBool
+date_toString(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+              jsval *rval)
+{
+    jsdouble *date = date_getProlog(cx, obj, argv);
+    if (!date)
+        return JS_FALSE;
+    return date_format(cx, *date, FORMATSPEC_FULL, rval);
+}
+
+static JSBool
+date_valueOf(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
+             jsval *rval)
+{
+    /* It is an error to call date_valueOf on a non-date object, but we don't
+     * need to check for that explicitly here because every path calls
+     * date_getProlog, which does the check.
+     */
+
+    /* If called directly with no arguments, convert to a time number. */
+    if (argc == 0)
+        return date_getTime(cx, obj, argc, argv, rval);
+
+    /* Convert to number only if the hint was given, otherwise favor string. */
+    if (argc == 1) {
+        JSString *str, *str2;
+
+        str = js_ValueToString(cx, argv[0]);
+        if (!str)
+            return JS_FALSE;
+        str2 = ATOM_TO_STRING(cx->runtime->atomState.typeAtoms[JSTYPE_NUMBER]);
+        if (js_EqualStrings(str, str2))
+            return date_getTime(cx, obj, argc, argv, rval);
+    }
+    return date_toString(cx, obj, argc, argv, rval);
+}
+
+
+/*
+ * creation and destruction
+ */
+
+static JSFunctionSpec date_static_methods[] = {
+    {"UTC",               date_UTC,               MAXARGS,0,0 },
+    {"parse",             date_parse,             1,0,0 },
+    {"now",               date_now,               0,0,0 },
+    {0,0,0,0,0}
+};
+
+static JSFunctionSpec date_methods[] = {
+    {"getTime",             date_getTime,           0,0,0 },
+    {"getTimezoneOffset",   date_getTimezoneOffset, 0,0,0 },
+    {"getYear",             date_getYear,           0,0,0 },
+    {"getFullYear",         date_getFullYear,       0,0,0 },
+    {"getUTCFullYear",      date_getUTCFullYear,    0,0,0 },
+    {"getMonth",            date_getMonth,          0,0,0 },
+    {"getUTCMonth",         date_getUTCMonth,       0,0,0 },
+    {"getDate",             date_getDate,           0,0,0 },
+    {"getUTCDate",          date_getUTCDate,        0,0,0 },
+    {"getDay",              date_getDay,            0,0,0 },
+    {"getUTCDay",           date_getUTCDay,         0,0,0 },
+    {"getHours",            date_getHours,          0,0,0 },
+    {"getUTCHours",         date_getUTCHours,       0,0,0 },
+    {"getMinutes",          date_getMinutes,        0,0,0 },
+    {"getUTCMinutes",       date_getUTCMinutes,     0,0,0 },
+    {"getSeconds",          date_getUTCSeconds,     0,0,0 },
+    {"getUTCSeconds",       date_getUTCSeconds,     0,0,0 },
+    {"getMilliseconds",     date_getUTCMilliseconds,0,0,0 },
+    {"getUTCMilliseconds",  date_getUTCMilliseconds,0,0,0 },
+    {"setTime",             date_setTime,           1,0,0 },
+    {"setYear",             date_setYear,           1,0,0 },
+    {"setFullYear",         date_setFullYear,       3,0,0 },
+    {"setUTCFullYear",      date_setUTCFullYear,    3,0,0 },
+    {"setMonth",            date_setMonth,          2,0,0 },
+    {"setUTCMonth",         date_setUTCMonth,       2,0,0 },
+    {"setDate",             date_setDate,           1,0,0 },
+    {"setUTCDate",          date_setUTCDate,        1,0,0 },
+    {"setHours",            date_setHours,          4,0,0 },
+    {"setUTCHours",         date_setUTCHours,       4,0,0 },
+    {"setMinutes",          date_setMinutes,        3,0,0 },
+    {"setUTCMinutes",       date_setUTCMinutes,     3,0,0 },
+    {"setSeconds",          date_setSeconds,        2,0,0 },
+    {"setUTCSeconds",       date_setUTCSeconds,     2,0,0 },
+    {"setMilliseconds",     date_setMilliseconds,   1,0,0 },
+    {"setUTCMilliseconds",  date_setUTCMilliseconds,1,0,0 },
+    {"toUTCString",         date_toGMTString,       0,0,0 },
+    {js_toLocaleString_str, date_toLocaleString,    0,0,0 },
+    {"toLocaleDateString",  date_toLocaleDateString,0,0,0 },
+    {"toLocaleTimeString",  date_toLocaleTimeString,0,0,0 },
+    {"toLocaleFormat",      date_toLocaleFormat,    1,0,0 },
+    {"toDateString",        date_toDateString,      0,0,0 },
+    {"toTimeString",        date_toTimeString,      0,0,0 },
+#if JS_HAS_TOSOURCE
+    {js_toSource_str,       date_toSource,          0,0,0 },
+#endif
+    {js_toString_str,       date_toString,          0,0,0 },
+    {js_valueOf_str,        date_valueOf,           0,0,0 },
+    {0,0,0,0,0}
+};
+
+static jsdouble *
+date_constructor(JSContext *cx, JSObject* obj)
+{
+    jsdouble *date;
+
+    date = js_NewDouble(cx, 0.0, 0);
+    if (!date)
+        return NULL;
+    OBJ_SET_SLOT(cx, obj, JSSLOT_PRIVATE, DOUBLE_TO_JSVAL(date));
+    return date;
+}
+
+static JSBool
+Date(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+    jsdouble *date;
+    JSString *str;
+    jsdouble d;
+
+    /* Date called as function. */
+    if (!(cx->fp->flags & JSFRAME_CONSTRUCTING)) {
+        int64 us, ms, us2ms;
+        jsdouble msec_time;
+
+        /* NSPR 2.0 docs say 'We do not support PRMJ_NowMS and PRMJ_NowS',
+         * so compute ms from PRMJ_Now.
+         */
+        us = PRMJ_Now();
+        JSLL_UI2L(us2ms, PRMJ_USEC_PER_MSEC);
+        JSLL_DIV(ms, us, us2ms);
+        JSLL_L2D(msec_time, ms);
+
+        return date_format(cx, msec_time, FORMATSPEC_FULL, rval);
+    }
+
+    /* Date called as constructor. */
+    if (argc == 0) {
+        int64 us, ms, us2ms;
+        jsdouble msec_time;
+
+        date = date_constructor(cx, obj);
+        if (!date)
+            return JS_FALSE;
+
+        us = PRMJ_Now();
+        JSLL_UI2L(us2ms, PRMJ_USEC_PER_MSEC);
+        JSLL_DIV(ms, us, us2ms);
+        JSLL_L2D(msec_time, ms);
+
+        *date = msec_time;
+    } else if (argc == 1) {
+        if (!JSVAL_IS_STRING(argv[0])) {
+            /* the argument is a millisecond number */
+            if (!js_ValueToNumber(cx, argv[0], &d))
+                return JS_FALSE;
+            date = date_constructor(cx, obj);
+            if (!date)
+                return JS_FALSE;
+            *date = TIMECLIP(d);
+        } else {
+            /* the argument is a string; parse it. */
+            date = date_constructor(cx, obj);
+            if (!date)
+                return JS_FALSE;
+
+            str = js_ValueToString(cx, argv[0]);
+            if (!str)
+                return JS_FALSE;
+
+            if (!date_parseString(str, date))
+                *date = *cx->runtime->jsNaN;
+            *date = TIMECLIP(*date);
+        }
+    } else {
+        jsdouble array[MAXARGS];
+        uintN loop;
+        jsdouble double_arg;
+        jsdouble day;
+        jsdouble msec_time;
+
+        for (loop = 0; loop < MAXARGS; loop++) {
+            if (loop < argc) {
+                if (!js_ValueToNumber(cx, argv[loop], &double_arg))
+                    return JS_FALSE;
+                /* if any arg is NaN, make a NaN date object
+                   and return */
+                if (!JSDOUBLE_IS_FINITE(double_arg)) {
+                    date = date_constructor(cx, obj);
+                    if (!date)
+                        return JS_FALSE;
+                    *date = *cx->runtime->jsNaN;
+                    return JS_TRUE;
+                }
+                array[loop] = js_DoubleToInteger(double_arg);
+            } else {
+                if (loop == 2) {
+                    array[loop] = 1; /* Default the date argument to 1. */
+                } else {
+                    array[loop] = 0;
+                }
+            }
+        }
+
+        date = date_constructor(cx, obj);
+        if (!date)
+            return JS_FALSE;
+
+        /* adjust 2-digit years into the 20th century */
+        if (array[0] >= 0 && array[0] <= 99)
+            array[0] += 1900;
+
+        day = MakeDay(array[0], array[1], array[2]);
+        msec_time = MakeTime(array[3], array[4], array[5], array[6]);
+        msec_time = MakeDate(day, msec_time);
+        msec_time = UTC(msec_time);
+        *date = TIMECLIP(msec_time);
+    }
+    return JS_TRUE;
+}
+
+JSObject *
+js_InitDateClass(JSContext *cx, JSObject *obj)
+{
+    JSObject *proto;
+    jsdouble *proto_date;
+
+    /* set static LocalTZA */
+    LocalTZA = -(PRMJ_LocalGMTDifference() * msPerSecond);
+    proto = JS_InitClass(cx, obj, NULL, &js_DateClass, Date, MAXARGS,
+                         NULL, date_methods, NULL, date_static_methods);
+    if (!proto)
+        return NULL;
+
+    /* Alias toUTCString with toGMTString.  (ECMA B.2.6) */
+    if (!JS_AliasProperty(cx, proto, "toUTCString", "toGMTString"))
+        return NULL;
+
+    /* Set the value of the Date.prototype date to NaN */
+    proto_date = date_constructor(cx, proto);
+    if (!proto_date)
+        return NULL;
+    *proto_date = *cx->runtime->jsNaN;
+
+    return proto;
+}
+
+JS_FRIEND_API(JSObject *)
+js_NewDateObjectMsec(JSContext *cx, jsdouble msec_time)
+{
+    JSObject *obj;
+    jsdouble *date;
+
+    obj = js_NewObject(cx, &js_DateClass, NULL, NULL);
+    if (!obj)
+        return NULL;
+
+    date = date_constructor(cx, obj);
+    if (!date)
+        return NULL;
+
+    *date = msec_time;
+    return obj;
+}
+
+JS_FRIEND_API(JSObject *)
+js_NewDateObject(JSContext* cx, int year, int mon, int mday,
+                 int hour, int min, int sec)
+{
+    JSObject *obj;
+    jsdouble msec_time;
+
+    msec_time = date_msecFromDate(year, mon, mday, hour, min, sec, 0);
+    obj = js_NewDateObjectMsec(cx, UTC(msec_time));
+    return obj;
+}
+
+JS_FRIEND_API(JSBool)
+js_DateIsValid(JSContext *cx, JSObject* obj)
+{
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+
+    if (!date || JSDOUBLE_IS_NaN(*date))
+        return JS_FALSE;
+    else
+        return JS_TRUE;
+}
+
+JS_FRIEND_API(int)
+js_DateGetYear(JSContext *cx, JSObject* obj)
+{
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+
+    /* Preserve legacy API behavior of returning 0 for invalid dates. */
+    if (!date || JSDOUBLE_IS_NaN(*date))
+        return 0;
+    return (int) YearFromTime(LocalTime(*date));
+}
+
+JS_FRIEND_API(int)
+js_DateGetMonth(JSContext *cx, JSObject* obj)
+{
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+
+    if (!date || JSDOUBLE_IS_NaN(*date))
+        return 0;
+    return (int) MonthFromTime(LocalTime(*date));
+}
+
+JS_FRIEND_API(int)
+js_DateGetDate(JSContext *cx, JSObject* obj)
+{
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+
+    if (!date || JSDOUBLE_IS_NaN(*date))
+        return 0;
+    return (int) DateFromTime(LocalTime(*date));
+}
+
+JS_FRIEND_API(int)
+js_DateGetHours(JSContext *cx, JSObject* obj)
+{
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+
+    if (!date || JSDOUBLE_IS_NaN(*date))
+        return 0;
+    return (int) HourFromTime(LocalTime(*date));
+}
+
+JS_FRIEND_API(int)
+js_DateGetMinutes(JSContext *cx, JSObject* obj)
+{
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+
+    if (!date || JSDOUBLE_IS_NaN(*date))
+        return 0;
+    return (int) MinFromTime(LocalTime(*date));
+}
+
+JS_FRIEND_API(int)
+js_DateGetSeconds(JSContext *cx, JSObject* obj)
+{
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+
+    if (!date || JSDOUBLE_IS_NaN(*date))
+        return 0;
+    return (int) SecFromTime(*date);
+}
+
+JS_FRIEND_API(void)
+js_DateSetYear(JSContext *cx, JSObject *obj, int year)
+{
+    jsdouble local;
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+    if (!date)
+        return;
+    local = LocalTime(*date);
+    /* reset date if it was NaN */
+    if (JSDOUBLE_IS_NaN(local))
+        local = 0;
+    local = date_msecFromDate(year,
+                              MonthFromTime(local),
+                              DateFromTime(local),
+                              HourFromTime(local),
+                              MinFromTime(local),
+                              SecFromTime(local),
+                              msFromTime(local));
+    *date = UTC(local);
+}
+
+JS_FRIEND_API(void)
+js_DateSetMonth(JSContext *cx, JSObject *obj, int month)
+{
+    jsdouble local;
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+    if (!date)
+        return;
+    local = LocalTime(*date);
+    /* bail if date was NaN */
+    if (JSDOUBLE_IS_NaN(local))
+        return;
+    local = date_msecFromDate(YearFromTime(local),
+                              month,
+                              DateFromTime(local),
+                              HourFromTime(local),
+                              MinFromTime(local),
+                              SecFromTime(local),
+                              msFromTime(local));
+    *date = UTC(local);
+}
+
+JS_FRIEND_API(void)
+js_DateSetDate(JSContext *cx, JSObject *obj, int date)
+{
+    jsdouble local;
+    jsdouble *datep = date_getProlog(cx, obj, NULL);
+    if (!datep)
+        return;
+    local = LocalTime(*datep);
+    if (JSDOUBLE_IS_NaN(local))
+        return;
+    local = date_msecFromDate(YearFromTime(local),
+                              MonthFromTime(local),
+                              date,
+                              HourFromTime(local),
+                              MinFromTime(local),
+                              SecFromTime(local),
+                              msFromTime(local));
+    *datep = UTC(local);
+}
+
+JS_FRIEND_API(void)
+js_DateSetHours(JSContext *cx, JSObject *obj, int hours)
+{
+    jsdouble local;
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+    if (!date)
+        return;
+    local = LocalTime(*date);
+    if (JSDOUBLE_IS_NaN(local))
+        return;
+    local = date_msecFromDate(YearFromTime(local),
+                              MonthFromTime(local),
+                              DateFromTime(local),
+                              hours,
+                              MinFromTime(local),
+                              SecFromTime(local),
+                              msFromTime(local));
+    *date = UTC(local);
+}
+
+JS_FRIEND_API(void)
+js_DateSetMinutes(JSContext *cx, JSObject *obj, int minutes)
+{
+    jsdouble local;
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+    if (!date)
+        return;
+    local = LocalTime(*date);
+    if (JSDOUBLE_IS_NaN(local))
+        return;
+    local = date_msecFromDate(YearFromTime(local),
+                              MonthFromTime(local),
+                              DateFromTime(local),
+                              HourFromTime(local),
+                              minutes,
+                              SecFromTime(local),
+                              msFromTime(local));
+    *date = UTC(local);
+}
+
+JS_FRIEND_API(void)
+js_DateSetSeconds(JSContext *cx, JSObject *obj, int seconds)
+{
+    jsdouble local;
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+    if (!date)
+        return;
+    local = LocalTime(*date);
+    if (JSDOUBLE_IS_NaN(local))
+        return;
+    local = date_msecFromDate(YearFromTime(local),
+                              MonthFromTime(local),
+                              DateFromTime(local),
+                              HourFromTime(local),
+                              MinFromTime(local),
+                              seconds,
+                              msFromTime(local));
+    *date = UTC(local);
+}
+
+JS_FRIEND_API(jsdouble)
+js_DateGetMsecSinceEpoch(JSContext *cx, JSObject *obj)
+{
+    jsdouble *date = date_getProlog(cx, obj, NULL);
+    if (!date || JSDOUBLE_IS_NaN(*date))
+        return 0;
+    return (*date);
+}