[date] Refactor the %_DateField intrinsic to be optimizable.

src/date.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var $createDate;
 
 // -------------------------------------------------------------------
 
 (function(global, utils) {
 
@@ skipping 184 matching lines @@
 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(date) {
+  CHECK_DATE(date);
   return WeekDays[LOCAL_WEEKDAY(date)] + ' '
       + Months[LOCAL_MONTH(date)] + ' '
       + TwoDigitString(LOCAL_DAY(date)) + ' '
       + LOCAL_YEAR(date);
 }
 
 
 var LongWeekDays = ['Sunday', 'Monday', 'Tuesday', 'Wednesday',
     'Thursday', 'Friday', 'Saturday'];
 var LongMonths = ['January', 'February', 'March', 'April', 'May', 'June',
     'July', 'August', 'September', 'October', 'November', 'December'];
 
 
 function LongDateString(date) {
+  CHECK_DATE(date);
   return LongWeekDays[LOCAL_WEEKDAY(date)] + ', '
       + LongMonths[LOCAL_MONTH(date)] + ' '
       + TwoDigitString(LOCAL_DAY(date)) + ', '
       + LOCAL_YEAR(date);
 }
 
 
 function TimeString(date) {
+  CHECK_DATE(date);
   return TwoDigitString(LOCAL_HOUR(date)) + ':'
       + TwoDigitString(LOCAL_MIN(date)) + ':'
       + TwoDigitString(LOCAL_SEC(date));
 }
 
 
 function TimeStringUTC(date) {
+  CHECK_DATE(date);
   return TwoDigitString(UTC_HOUR(date)) + ':'
       + TwoDigitString(UTC_MIN(date)) + ':'
       + TwoDigitString(UTC_SEC(date));
 }
 
 
 function LocalTimezoneString(date) {
+  CHECK_DATE(date);
   var timezone = LocalTimezone(UTC_DATE_VALUE(date));
 
   var timezoneOffset = -TIMEZONE_OFFSET(date);
   var sign = (timezoneOffset >= 0) ? 1 : -1;
   var hours = MathFloor((sign * timezoneOffset)/60);
   var min   = MathFloor((sign * timezoneOffset)%60);
   var gmt = ' GMT' + ((sign == 1) ? '+' : '-') +
       TwoDigitString(hours) + TwoDigitString(min);
   return gmt + ' (' +  timezone + ')';
 }
 
 
 function DatePrintString(date) {
+  CHECK_DATE(date);
   return DateString(date) + ' ' + TimeString(date);
 }
 
 // -------------------------------------------------------------------
 
 // Reused output buffer. Used when parsing date strings.
 var parse_buffer = new InternalArray(8);
 
 // ECMA 262 - 15.9.4.2
 function DateParse(string) {
@@ skipping 32 matching lines @@
 
 
 // ECMA 262 - 15.9.4.4
 function DateNow() {
   return %DateCurrentTime();
 }
 
 
 // ECMA 262 - 15.9.5.2
 function DateToString() {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this)
   if (NUMBER_IS_NAN(t)) return kInvalidDate;
   var time_zone_string = LocalTimezoneString(this)
   return DatePrintString(this) + time_zone_string;
 }
 
 
 // ECMA 262 - 15.9.5.3
 function DateToDateString() {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) return kInvalidDate;
   return DateString(this);
 }
 
 
 // ECMA 262 - 15.9.5.4
 function DateToTimeString() {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) return kInvalidDate;
   var time_zone_string = LocalTimezoneString(this);
   return TimeString(this) + time_zone_string;
 }
 
 
 // ECMA 262 - 15.9.5.5
 function DateToLocaleString() {
+  CHECK_DATE(this);
   return %_CallFunction(this, DateToString);
 }
 
 
 // ECMA 262 - 15.9.5.6
 function DateToLocaleDateString() {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) return kInvalidDate;
   return LongDateString(this);
 }
 
 
 // ECMA 262 - 15.9.5.7
 function DateToLocaleTimeString() {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) return kInvalidDate;
   return TimeString(this);
 }
 
 
 // ECMA 262 - 15.9.5.8
 function DateValueOf() {
+  CHECK_DATE(this);
   return UTC_DATE_VALUE(this);
 }
 
 
 // ECMA 262 - 15.9.5.9
 function DateGetTime() {
+  CHECK_DATE(this);
   return UTC_DATE_VALUE(this);
 }
 
 
 // ECMA 262 - 15.9.5.10
 function DateGetFullYear() {
+  CHECK_DATE(this);
   return LOCAL_YEAR(this);
 }
 
 
 // ECMA 262 - 15.9.5.11
 function DateGetUTCFullYear() {
+  CHECK_DATE(this);
   return UTC_YEAR(this);
 }
 
 
 // ECMA 262 - 15.9.5.12
 function DateGetMonth() {
+  CHECK_DATE(this);
   return LOCAL_MONTH(this);
 }
 
 
 // ECMA 262 - 15.9.5.13
 function DateGetUTCMonth() {
+  CHECK_DATE(this);
   return UTC_MONTH(this);
 }
 
 
 // ECMA 262 - 15.9.5.14
 function DateGetDate() {
+  CHECK_DATE(this);
   return LOCAL_DAY(this);
 }
 
 
 // ECMA 262 - 15.9.5.15
 function DateGetUTCDate() {
+  CHECK_DATE(this);
   return UTC_DAY(this);
 }
 
 
 // ECMA 262 - 15.9.5.16
 function DateGetDay() {
+  CHECK_DATE(this);
   return LOCAL_WEEKDAY(this);
 }
 
 
 // ECMA 262 - 15.9.5.17
 function DateGetUTCDay() {
+  CHECK_DATE(this);
   return UTC_WEEKDAY(this);
 }
 
 
 // ECMA 262 - 15.9.5.18
 function DateGetHours() {
+  CHECK_DATE(this);
   return LOCAL_HOUR(this);
 }
 
 
 // ECMA 262 - 15.9.5.19
 function DateGetUTCHours() {
+  CHECK_DATE(this);
   return UTC_HOUR(this);
 }
 
 
 // ECMA 262 - 15.9.5.20
 function DateGetMinutes() {
+  CHECK_DATE(this);
   return LOCAL_MIN(this);
 }
 
 
 // ECMA 262 - 15.9.5.21
 function DateGetUTCMinutes() {
+  CHECK_DATE(this);
   return UTC_MIN(this);
 }
 
 
 // ECMA 262 - 15.9.5.22
 function DateGetSeconds() {
+  CHECK_DATE(this);
   return LOCAL_SEC(this);
 }
 
 
 // ECMA 262 - 15.9.5.23
 function DateGetUTCSeconds() {
+  CHECK_DATE(this);
   return UTC_SEC(this)
 }
 
 
 // ECMA 262 - 15.9.5.24
 function DateGetMilliseconds() {
+  CHECK_DATE(this);
   return LOCAL_MS(this);
 }
 
 
 // ECMA 262 - 15.9.5.25
 function DateGetUTCMilliseconds() {
+  CHECK_DATE(this);
   return UTC_MS(this);
 }
 
 
 // ECMA 262 - 15.9.5.26
 function DateGetTimezoneOffset() {
+  CHECK_DATE(this);
   return TIMEZONE_OFFSET(this);
 }
 
 
 // ECMA 262 - 15.9.5.27
 function DateSetTime(ms) {
   CHECK_DATE(this);
   SET_UTC_DATE_VALUE(this, $toNumber(ms));
   return UTC_DATE_VALUE(this);
 }
 
 
 // ECMA 262 - 15.9.5.28
 function DateSetMilliseconds(ms) {
+  CHECK_DATE(this);
   var t = LOCAL_DATE_VALUE(this);
   ms = $toNumber(ms);
   var time = MakeTime(LOCAL_HOUR(this), LOCAL_MIN(this), LOCAL_SEC(this), ms);
   return SET_LOCAL_DATE_VALUE(this, MakeDate(LOCAL_DAYS(this), time));
 }
 
 
 // ECMA 262 - 15.9.5.29
 function DateSetUTCMilliseconds(ms) {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   ms = $toNumber(ms);
   var time = MakeTime(UTC_HOUR(this),
                       UTC_MIN(this),
                       UTC_SEC(this),
                       ms);
   return SET_UTC_DATE_VALUE(this, MakeDate(UTC_DAYS(this), time));
 }
 
 
 // ECMA 262 - 15.9.5.30
 function DateSetSeconds(sec, ms) {
+  CHECK_DATE(this);
   var t = LOCAL_DATE_VALUE(this);
   sec = $toNumber(sec);
   ms = %_ArgumentsLength() < 2 ? LOCAL_MS(this) : $toNumber(ms);
   var time = MakeTime(LOCAL_HOUR(this), LOCAL_MIN(this), sec, ms);
   return SET_LOCAL_DATE_VALUE(this, MakeDate(LOCAL_DAYS(this), time));
 }
 
 
 // ECMA 262 - 15.9.5.31
 function DateSetUTCSeconds(sec, ms) {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   sec = $toNumber(sec);
   ms = %_ArgumentsLength() < 2 ? UTC_MS(this) : $toNumber(ms);
   var time = MakeTime(UTC_HOUR(this), UTC_MIN(this), sec, ms);
   return SET_UTC_DATE_VALUE(this, MakeDate(UTC_DAYS(this), time));
 }
 
 
 // ECMA 262 - 15.9.5.33
 function DateSetMinutes(min, sec, ms) {
+  CHECK_DATE(this);
   var t = LOCAL_DATE_VALUE(this);
   min = $toNumber(min);
   var argc = %_ArgumentsLength();
   sec = argc < 2 ? LOCAL_SEC(this) : $toNumber(sec);
   ms = argc < 3 ? LOCAL_MS(this) : $toNumber(ms);
   var time = MakeTime(LOCAL_HOUR(this), min, sec, ms);
   return SET_LOCAL_DATE_VALUE(this, MakeDate(LOCAL_DAYS(this), time));
 }
 
 
 // ECMA 262 - 15.9.5.34
 function DateSetUTCMinutes(min, sec, ms) {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   min = $toNumber(min);
   var argc = %_ArgumentsLength();
   sec = argc < 2 ? UTC_SEC(this) : $toNumber(sec);
   ms = argc < 3 ? UTC_MS(this) : $toNumber(ms);
   var time = MakeTime(UTC_HOUR(this), min, sec, ms);
   return SET_UTC_DATE_VALUE(this, MakeDate(UTC_DAYS(this), time));
 }
 
 
 // ECMA 262 - 15.9.5.35
 function DateSetHours(hour, min, sec, ms) {
+  CHECK_DATE(this);
   var t = LOCAL_DATE_VALUE(this);
   hour = $toNumber(hour);
   var argc = %_ArgumentsLength();
   min = argc < 2 ? LOCAL_MIN(this) : $toNumber(min);
   sec = argc < 3 ? LOCAL_SEC(this) : $toNumber(sec);
   ms = argc < 4 ? LOCAL_MS(this) : $toNumber(ms);
   var time = MakeTime(hour, min, sec, ms);
   return SET_LOCAL_DATE_VALUE(this, MakeDate(LOCAL_DAYS(this), time));
 }
 
 
 // ECMA 262 - 15.9.5.34
 function DateSetUTCHours(hour, min, sec, ms) {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   hour = $toNumber(hour);
   var argc = %_ArgumentsLength();
   min = argc < 2 ? UTC_MIN(this) : $toNumber(min);
   sec = argc < 3 ? UTC_SEC(this) : $toNumber(sec);
   ms = argc < 4 ? UTC_MS(this) : $toNumber(ms);
   var time = MakeTime(hour, min, sec, ms);
   return SET_UTC_DATE_VALUE(this, MakeDate(UTC_DAYS(this), time));
 }
 
 
 // ECMA 262 - 15.9.5.36
 function DateSetDate(date) {
+  CHECK_DATE(this);
   var t = LOCAL_DATE_VALUE(this);
   date = $toNumber(date);
   var day = MakeDay(LOCAL_YEAR(this), LOCAL_MONTH(this), date);
   return SET_LOCAL_DATE_VALUE(this, MakeDate(day, LOCAL_TIME_IN_DAY(this)));
 }
 
 
 // ECMA 262 - 15.9.5.37
 function DateSetUTCDate(date) {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   date = $toNumber(date);
   var day = MakeDay(UTC_YEAR(this), UTC_MONTH(this), date);
   return SET_UTC_DATE_VALUE(this, MakeDate(day, UTC_TIME_IN_DAY(this)));
 }
 
 
 // ECMA 262 - 15.9.5.38
 function DateSetMonth(month, date) {
+  CHECK_DATE(this);
   var t = LOCAL_DATE_VALUE(this);
   month = $toNumber(month);
   date = %_ArgumentsLength() < 2 ? LOCAL_DAY(this) : $toNumber(date);
   var day = MakeDay(LOCAL_YEAR(this), month, date);
   return SET_LOCAL_DATE_VALUE(this, MakeDate(day, LOCAL_TIME_IN_DAY(this)));
 }
 
 
 // ECMA 262 - 15.9.5.39
 function DateSetUTCMonth(month, date) {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   month = $toNumber(month);
   date = %_ArgumentsLength() < 2 ? UTC_DAY(this) : $toNumber(date);
   var day = MakeDay(UTC_YEAR(this), month, date);
   return SET_UTC_DATE_VALUE(this, MakeDate(day, UTC_TIME_IN_DAY(this)));
 }
 
 
 // ECMA 262 - 15.9.5.40
 function DateSetFullYear(year, month, date) {
+  CHECK_DATE(this);
   var t = LOCAL_DATE_VALUE(this);
   year = $toNumber(year);
   var argc = %_ArgumentsLength();
   var time ;
   if (NUMBER_IS_NAN(t)) {
     month = argc < 2 ? 0 : $toNumber(month);
     date = argc < 3 ? 1 : $toNumber(date);
     time = 0;
   } else {
     month = argc < 2 ? LOCAL_MONTH(this) : $toNumber(month);
     date = argc < 3 ? LOCAL_DAY(this) : $toNumber(date);
     time = LOCAL_TIME_IN_DAY(this);
   }
   var day = MakeDay(year, month, date);
   return SET_LOCAL_DATE_VALUE(this, MakeDate(day, time));
 }
 
 
 // ECMA 262 - 15.9.5.41
 function DateSetUTCFullYear(year, month, date) {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   year = $toNumber(year);
   var argc = %_ArgumentsLength();
   var time ;
   if (NUMBER_IS_NAN(t)) {
     month = argc < 2 ? 0 : $toNumber(month);
     date = argc < 3 ? 1 : $toNumber(date);
     time = 0;
   } else {
     month = argc < 2 ? UTC_MONTH(this) : $toNumber(month);
     date = argc < 3 ? UTC_DAY(this) : $toNumber(date);
     time = UTC_TIME_IN_DAY(this);
   }
   var day = MakeDay(year, month, date);
   return SET_UTC_DATE_VALUE(this, MakeDate(day, time));
 }
 
 
 // ECMA 262 - 15.9.5.42
 function DateToUTCString() {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) return kInvalidDate;
   // Return UTC string of the form: Sat, 31 Jan 1970 23:00:00 GMT
   return WeekDays[UTC_WEEKDAY(this)] + ', '
       + TwoDigitString(UTC_DAY(this)) + ' '
       + Months[UTC_MONTH(this)] + ' '
       + UTC_YEAR(this) + ' '
       + TimeStringUTC(this) + ' GMT';
 }
 
 
 // ECMA 262 - B.2.4
 function DateGetYear() {
+  CHECK_DATE(this);
   return LOCAL_YEAR(this) - 1900;
 }
 
 
 // ECMA 262 - B.2.5
 function DateSetYear(year) {
   CHECK_DATE(this);
   year = $toNumber(year);
   if (NUMBER_IS_NAN(year)) return SET_UTC_DATE_VALUE(this, NAN);
   year = (0 <= TO_INTEGER(year) && TO_INTEGER(year) <= 99)
@@ skipping 27 matching lines @@
 
 
 function PadInt(n, digits) {
   if (digits == 1) return n;
   return n < %_MathPow(10, digits - 1) ? '0' + PadInt(n, digits - 1) : n;
 }
 
 
 // ECMA 262 - 15.9.5.43
 function DateToISOString() {
+  CHECK_DATE(this);
   var t = UTC_DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) throw MakeRangeError(kInvalidTimeValue);
   var year = this.getUTCFullYear();
   var year_string;
   if (year >= 0 && year <= 9999) {
     year_string = PadInt(year, 4);
   } else {
     if (year < 0) {
       year_string = "-" + PadInt(-year, 6);
     } else {
@@ skipping 114 matching lines @@
   "getYear", DateGetYear,
   "setYear", DateSetYear,
   "toISOString", DateToISOString,
   "toJSON", DateToJSON
 ]);
 
 // Expose to the global scope.
 $createDate = CreateDate;
 
 })