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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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29 // ------------------------------------------------------------------- | 29 // ------------------------------------------------------------------- |
30 | 30 |
31 // This file contains date support implemented in JavaScript. | 31 // This file contains date support implemented in JavaScript. |
32 | 32 |
33 | 33 |
34 // Keep reference to original values of some global properties. This | 34 // Keep reference to original values of some global properties. This |
35 // has the added benefit that the code in this file is isolated from | 35 // has the added benefit that the code in this file is isolated from |
36 // changes to these properties. | 36 // changes to these properties. |
37 const $Date = global.Date; | 37 const $Date = global.Date; |
38 | 38 |
39 | |
40 // ECMA 262 - 15.9.1.2 | 39 // ECMA 262 - 15.9.1.2 |
41 function Day(time) { | 40 function Day(time) { |
42 return $floor(time/msPerDay); | 41 return $floor(time/msPerDay); |
43 } | 42 } |
44 | 43 |
45 | 44 |
46 // ECMA 262 - 5.2 | 45 // ECMA 262 - 5.2 |
47 function Modulo(value, remainder) { | 46 function Modulo(value, remainder) { |
48 var mod = value % remainder; | 47 var mod = value % remainder; |
49 return mod >= 0 ? mod : mod + remainder; | 48 return mod >= 0 ? mod : mod + remainder; |
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120 // We solve this by mapping the time to a year with same leap-year-ness | 119 // We solve this by mapping the time to a year with same leap-year-ness |
121 // and same starting day for the year. | 120 // and same starting day for the year. |
122 // As an optimization we avoid finding an equivalent year in the common | 121 // As an optimization we avoid finding an equivalent year in the common |
123 // case. We are measuring in ms here so the 32 bit signed integer range | 122 // case. We are measuring in ms here so the 32 bit signed integer range |
124 // is +-(1<<30)*1000 ie approximately +-2.1e20. | 123 // is +-(1<<30)*1000 ie approximately +-2.1e20. |
125 if (t >= -2.1e12 && t <= 2.1e12) return t; | 124 if (t >= -2.1e12 && t <= 2.1e12) return t; |
126 var day = MakeDay(EquivalentYear(YearFromTime(t)), MonthFromTime(t), DateFromT
ime(t)); | 125 var day = MakeDay(EquivalentYear(YearFromTime(t)), MonthFromTime(t), DateFromT
ime(t)); |
127 return TimeClip(MakeDate(day, TimeWithinDay(t))); | 126 return TimeClip(MakeDate(day, TimeWithinDay(t))); |
128 } | 127 } |
129 | 128 |
130 | |
131 var local_time_offset; | |
132 | |
133 function LocalTimeOffset() { | |
134 if (IS_UNDEFINED(local_time_offset)) { | |
135 local_time_offset = %DateLocalTimeOffset(); | |
136 } | |
137 return local_time_offset; | |
138 } | |
139 | |
140 | |
141 var daylight_cache_time = $NaN; | 129 var daylight_cache_time = $NaN; |
142 var daylight_cache_offset; | 130 var daylight_cache_offset; |
143 | 131 |
144 function DaylightSavingsOffset(t) { | 132 function DaylightSavingsOffset(t) { |
145 if (t == daylight_cache_time) { | 133 if (t == daylight_cache_time) { |
146 return daylight_cache_offset; | 134 return daylight_cache_offset; |
147 } | 135 } |
148 var offset = %DateDaylightSavingsOffset(EquivalentTime(t)); | 136 var offset = %DateDaylightSavingsOffset(EquivalentTime(t)); |
149 daylight_cache_time = t; | 137 daylight_cache_time = t; |
150 daylight_cache_offset = offset; | 138 daylight_cache_offset = offset; |
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163 timezone_cache_time = t; | 151 timezone_cache_time = t; |
164 timezone_cache_timezone = timezone; | 152 timezone_cache_timezone = timezone; |
165 return timezone; | 153 return timezone; |
166 } | 154 } |
167 | 155 |
168 | 156 |
169 function WeekDay(time) { | 157 function WeekDay(time) { |
170 return Modulo(Day(time) + 4, 7); | 158 return Modulo(Day(time) + 4, 7); |
171 } | 159 } |
172 | 160 |
| 161 var local_time_offset = %DateLocalTimeOffset(); |
173 | 162 |
174 function LocalTime(time) { | 163 function LocalTime(time) { |
175 if ($isNaN(time)) return time; | 164 if ($isNaN(time)) return time; |
176 return time + LocalTimeOffset() + DaylightSavingsOffset(time); | 165 return time + local_time_offset + DaylightSavingsOffset(time); |
177 } | 166 } |
178 | 167 |
179 | 168 |
180 function UTC(time) { | 169 function UTC(time) { |
181 if ($isNaN(time)) return time; | 170 if ($isNaN(time)) return time; |
182 var tmp = time - LocalTimeOffset(); | 171 var tmp = time - local_time_offset; |
183 return tmp - DaylightSavingsOffset(tmp); | 172 return tmp - DaylightSavingsOffset(tmp); |
184 } | 173 } |
185 | 174 |
186 | 175 |
187 // ECMA 262 - 15.9.1.10 | 176 // ECMA 262 - 15.9.1.10 |
188 function HourFromTime(time) { | 177 function HourFromTime(time) { |
189 return Modulo($floor(time / msPerHour), HoursPerDay); | 178 return Modulo($floor(time / msPerHour), HoursPerDay); |
190 } | 179 } |
191 | 180 |
192 | 181 |
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523 | 512 |
524 | 513 |
525 function TimeString(time) { | 514 function TimeString(time) { |
526 return TwoDigitString(HourFromTime(time)) + ':' | 515 return TwoDigitString(HourFromTime(time)) + ':' |
527 + TwoDigitString(MinFromTime(time)) + ':' | 516 + TwoDigitString(MinFromTime(time)) + ':' |
528 + TwoDigitString(SecFromTime(time)); | 517 + TwoDigitString(SecFromTime(time)); |
529 } | 518 } |
530 | 519 |
531 | 520 |
532 function LocalTimezoneString(time) { | 521 function LocalTimezoneString(time) { |
533 var timezoneOffset = (LocalTimeOffset() + DaylightSavingsOffset(time)) / msPer
Minute; | 522 var timezoneOffset = (local_time_offset + DaylightSavingsOffset(time)) / msPer
Minute; |
534 var sign = (timezoneOffset >= 0) ? 1 : -1; | 523 var sign = (timezoneOffset >= 0) ? 1 : -1; |
535 var hours = $floor((sign * timezoneOffset)/60); | 524 var hours = $floor((sign * timezoneOffset)/60); |
536 var min = $floor((sign * timezoneOffset)%60); | 525 var min = $floor((sign * timezoneOffset)%60); |
537 var gmt = ' GMT' + ((sign == 1) ? '+' : '-') + TwoDigitString(hours) + TwoDigi
tString(min); | 526 var gmt = ' GMT' + ((sign == 1) ? '+' : '-') + TwoDigitString(hours) + TwoDigi
tString(min); |
538 return gmt + ' (' + LocalTimezone(time) + ')'; | 527 return gmt + ' (' + LocalTimezone(time) + ')'; |
539 } | 528 } |
540 | 529 |
541 | 530 |
542 function DatePrintString(time) { | 531 function DatePrintString(time) { |
543 return DateString(time) + ' ' + TimeString(time); | 532 return DateString(time) + ' ' + TimeString(time); |
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1016 "setFullYear", DateSetFullYear, | 1005 "setFullYear", DateSetFullYear, |
1017 "setUTCFullYear", DateSetUTCFullYear, | 1006 "setUTCFullYear", DateSetUTCFullYear, |
1018 "toGMTString", DateToGMTString, | 1007 "toGMTString", DateToGMTString, |
1019 "toUTCString", DateToUTCString, | 1008 "toUTCString", DateToUTCString, |
1020 "getYear", DateGetYear, | 1009 "getYear", DateGetYear, |
1021 "setYear", DateSetYear | 1010 "setYear", DateSetYear |
1022 )); | 1011 )); |
1023 } | 1012 } |
1024 | 1013 |
1025 SetupDate(); | 1014 SetupDate(); |
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