Jungshik Shin | 87232d8 | 2017-05-13 21:10:13 -0700 | [diff] [blame] | 1 | // © 2016 and later: Unicode, Inc. and others. |
Jungshik Shin | 5feb9ad | 2016-10-21 12:52:48 -0700 | [diff] [blame] | 2 | // License & terms of use: http://www.unicode.org/copyright.html |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 3 | /* |
| 4 | ******************************************************************************* |
| 5 | * Copyright (C) 2007-2013, International Business Machines Corporation and |
| 6 | * others. All Rights Reserved. |
| 7 | ******************************************************************************* |
| 8 | */ |
| 9 | |
| 10 | #include "unicode/utypes.h" |
| 11 | |
| 12 | #if !UCONFIG_NO_FORMATTING |
| 13 | |
| 14 | #include "unicode/basictz.h" |
| 15 | #include "gregoimp.h" |
| 16 | #include "uvector.h" |
| 17 | #include "cmemory.h" |
| 18 | |
| 19 | U_NAMESPACE_BEGIN |
| 20 | |
| 21 | #define MILLIS_PER_YEAR (365*24*60*60*1000.0) |
| 22 | |
| 23 | BasicTimeZone::BasicTimeZone() |
| 24 | : TimeZone() { |
| 25 | } |
| 26 | |
| 27 | BasicTimeZone::BasicTimeZone(const UnicodeString &id) |
| 28 | : TimeZone(id) { |
| 29 | } |
| 30 | |
| 31 | BasicTimeZone::BasicTimeZone(const BasicTimeZone& source) |
| 32 | : TimeZone(source) { |
| 33 | } |
| 34 | |
| 35 | BasicTimeZone::~BasicTimeZone() { |
| 36 | } |
| 37 | |
| 38 | UBool |
| 39 | BasicTimeZone::hasEquivalentTransitions(const BasicTimeZone& tz, UDate start, UDate end, |
| 40 | UBool ignoreDstAmount, UErrorCode& status) const { |
| 41 | if (U_FAILURE(status)) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 42 | return false; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 43 | } |
| 44 | if (hasSameRules(tz)) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 45 | return true; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 46 | } |
| 47 | // Check the offsets at the start time |
| 48 | int32_t raw1, raw2, dst1, dst2; |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 49 | getOffset(start, false, raw1, dst1, status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 50 | if (U_FAILURE(status)) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 51 | return false; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 52 | } |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 53 | tz.getOffset(start, false, raw2, dst2, status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 54 | if (U_FAILURE(status)) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 55 | return false; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 56 | } |
| 57 | if (ignoreDstAmount) { |
| 58 | if ((raw1 + dst1 != raw2 + dst2) |
| 59 | || (dst1 != 0 && dst2 == 0) |
| 60 | || (dst1 == 0 && dst2 != 0)) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 61 | return false; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 62 | } |
| 63 | } else { |
| 64 | if (raw1 != raw2 || dst1 != dst2) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 65 | return false; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 66 | } |
| 67 | } |
| 68 | // Check transitions in the range |
| 69 | UDate time = start; |
| 70 | TimeZoneTransition tr1, tr2; |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 71 | while (true) { |
| 72 | UBool avail1 = getNextTransition(time, false, tr1); |
| 73 | UBool avail2 = tz.getNextTransition(time, false, tr2); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 74 | |
| 75 | if (ignoreDstAmount) { |
| 76 | // Skip a transition which only differ the amount of DST savings |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 77 | while (true) { |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 78 | if (avail1 |
| 79 | && tr1.getTime() <= end |
| 80 | && (tr1.getFrom()->getRawOffset() + tr1.getFrom()->getDSTSavings() |
| 81 | == tr1.getTo()->getRawOffset() + tr1.getTo()->getDSTSavings()) |
| 82 | && (tr1.getFrom()->getDSTSavings() != 0 && tr1.getTo()->getDSTSavings() != 0)) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 83 | getNextTransition(tr1.getTime(), false, tr1); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 84 | } else { |
| 85 | break; |
| 86 | } |
| 87 | } |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 88 | while (true) { |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 89 | if (avail2 |
| 90 | && tr2.getTime() <= end |
| 91 | && (tr2.getFrom()->getRawOffset() + tr2.getFrom()->getDSTSavings() |
| 92 | == tr2.getTo()->getRawOffset() + tr2.getTo()->getDSTSavings()) |
| 93 | && (tr2.getFrom()->getDSTSavings() != 0 && tr2.getTo()->getDSTSavings() != 0)) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 94 | tz.getNextTransition(tr2.getTime(), false, tr2); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 95 | } else { |
| 96 | break; |
| 97 | } |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | UBool inRange1 = (avail1 && tr1.getTime() <= end); |
| 102 | UBool inRange2 = (avail2 && tr2.getTime() <= end); |
| 103 | if (!inRange1 && !inRange2) { |
| 104 | // No more transition in the range |
| 105 | break; |
| 106 | } |
| 107 | if (!inRange1 || !inRange2) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 108 | return false; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 109 | } |
| 110 | if (tr1.getTime() != tr2.getTime()) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 111 | return false; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 112 | } |
| 113 | if (ignoreDstAmount) { |
| 114 | if (tr1.getTo()->getRawOffset() + tr1.getTo()->getDSTSavings() |
| 115 | != tr2.getTo()->getRawOffset() + tr2.getTo()->getDSTSavings() |
| 116 | || (tr1.getTo()->getDSTSavings() != 0 && tr2.getTo()->getDSTSavings() == 0) |
| 117 | || (tr1.getTo()->getDSTSavings() == 0 && tr2.getTo()->getDSTSavings() != 0)) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 118 | return false; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 119 | } |
| 120 | } else { |
| 121 | if (tr1.getTo()->getRawOffset() != tr2.getTo()->getRawOffset() || |
| 122 | tr1.getTo()->getDSTSavings() != tr2.getTo()->getDSTSavings()) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 123 | return false; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 124 | } |
| 125 | } |
| 126 | time = tr1.getTime(); |
| 127 | } |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 128 | return true; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | void |
| 132 | BasicTimeZone::getSimpleRulesNear(UDate date, InitialTimeZoneRule*& initial, |
| 133 | AnnualTimeZoneRule*& std, AnnualTimeZoneRule*& dst, UErrorCode& status) const { |
| 134 | initial = NULL; |
| 135 | std = NULL; |
| 136 | dst = NULL; |
| 137 | if (U_FAILURE(status)) { |
| 138 | return; |
| 139 | } |
| 140 | int32_t initialRaw, initialDst; |
| 141 | UnicodeString initialName; |
| 142 | |
| 143 | AnnualTimeZoneRule *ar1 = NULL; |
| 144 | AnnualTimeZoneRule *ar2 = NULL; |
| 145 | UnicodeString name; |
| 146 | |
| 147 | UBool avail; |
| 148 | TimeZoneTransition tr; |
| 149 | // Get the next transition |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 150 | avail = getNextTransition(date, false, tr); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 151 | if (avail) { |
| 152 | tr.getFrom()->getName(initialName); |
| 153 | initialRaw = tr.getFrom()->getRawOffset(); |
| 154 | initialDst = tr.getFrom()->getDSTSavings(); |
| 155 | |
| 156 | // Check if the next transition is either DST->STD or STD->DST and |
| 157 | // within roughly 1 year from the specified date |
| 158 | UDate nextTransitionTime = tr.getTime(); |
| 159 | if (((tr.getFrom()->getDSTSavings() == 0 && tr.getTo()->getDSTSavings() != 0) |
| 160 | || (tr.getFrom()->getDSTSavings() != 0 && tr.getTo()->getDSTSavings() == 0)) |
| 161 | && (date + MILLIS_PER_YEAR > nextTransitionTime)) { |
| 162 | |
| 163 | int32_t year, month, dom, dow, doy, mid; |
| 164 | UDate d; |
| 165 | |
| 166 | // Get local wall time for the next transition time |
| 167 | Grego::timeToFields(nextTransitionTime + initialRaw + initialDst, |
| 168 | year, month, dom, dow, doy, mid); |
| 169 | int32_t weekInMonth = Grego::dayOfWeekInMonth(year, month, dom); |
| 170 | // Create DOW rule |
| 171 | DateTimeRule *dtr = new DateTimeRule(month, weekInMonth, dow, mid, DateTimeRule::WALL_TIME); |
| 172 | tr.getTo()->getName(name); |
| 173 | |
| 174 | // Note: SimpleTimeZone does not support raw offset change. |
| 175 | // So we always use raw offset of the given time for the rule, |
| 176 | // even raw offset is changed. This will result that the result |
| 177 | // zone to return wrong offset after the transition. |
| 178 | // When we encounter such case, we do not inspect next next |
| 179 | // transition for another rule. |
| 180 | ar1 = new AnnualTimeZoneRule(name, initialRaw, tr.getTo()->getDSTSavings(), |
| 181 | dtr, year, AnnualTimeZoneRule::MAX_YEAR); |
| 182 | |
| 183 | if (tr.getTo()->getRawOffset() == initialRaw) { |
| 184 | // Get the next next transition |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 185 | avail = getNextTransition(nextTransitionTime, false, tr); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 186 | if (avail) { |
| 187 | // Check if the next next transition is either DST->STD or STD->DST |
| 188 | // and within roughly 1 year from the next transition |
| 189 | if (((tr.getFrom()->getDSTSavings() == 0 && tr.getTo()->getDSTSavings() != 0) |
| 190 | || (tr.getFrom()->getDSTSavings() != 0 && tr.getTo()->getDSTSavings() == 0)) |
| 191 | && nextTransitionTime + MILLIS_PER_YEAR > tr.getTime()) { |
| 192 | |
| 193 | // Get local wall time for the next transition time |
| 194 | Grego::timeToFields(tr.getTime() + tr.getFrom()->getRawOffset() + tr.getFrom()->getDSTSavings(), |
| 195 | year, month, dom, dow, doy, mid); |
| 196 | weekInMonth = Grego::dayOfWeekInMonth(year, month, dom); |
| 197 | // Generate another DOW rule |
| 198 | dtr = new DateTimeRule(month, weekInMonth, dow, mid, DateTimeRule::WALL_TIME); |
| 199 | tr.getTo()->getName(name); |
| 200 | ar2 = new AnnualTimeZoneRule(name, tr.getTo()->getRawOffset(), tr.getTo()->getDSTSavings(), |
| 201 | dtr, year - 1, AnnualTimeZoneRule::MAX_YEAR); |
| 202 | |
| 203 | // Make sure this rule can be applied to the specified date |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 204 | avail = ar2->getPreviousStart(date, tr.getFrom()->getRawOffset(), tr.getFrom()->getDSTSavings(), true, d); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 205 | if (!avail || d > date |
| 206 | || initialRaw != tr.getTo()->getRawOffset() |
| 207 | || initialDst != tr.getTo()->getDSTSavings()) { |
| 208 | // We cannot use this rule as the second transition rule |
| 209 | delete ar2; |
| 210 | ar2 = NULL; |
| 211 | } |
| 212 | } |
| 213 | } |
| 214 | } |
| 215 | if (ar2 == NULL) { |
| 216 | // Try previous transition |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 217 | avail = getPreviousTransition(date, true, tr); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 218 | if (avail) { |
| 219 | // Check if the previous transition is either DST->STD or STD->DST. |
| 220 | // The actual transition time does not matter here. |
| 221 | if ((tr.getFrom()->getDSTSavings() == 0 && tr.getTo()->getDSTSavings() != 0) |
| 222 | || (tr.getFrom()->getDSTSavings() != 0 && tr.getTo()->getDSTSavings() == 0)) { |
| 223 | |
| 224 | // Generate another DOW rule |
| 225 | Grego::timeToFields(tr.getTime() + tr.getFrom()->getRawOffset() + tr.getFrom()->getDSTSavings(), |
| 226 | year, month, dom, dow, doy, mid); |
| 227 | weekInMonth = Grego::dayOfWeekInMonth(year, month, dom); |
| 228 | dtr = new DateTimeRule(month, weekInMonth, dow, mid, DateTimeRule::WALL_TIME); |
| 229 | tr.getTo()->getName(name); |
| 230 | |
| 231 | // second rule raw/dst offsets should match raw/dst offsets |
| 232 | // at the given time |
| 233 | ar2 = new AnnualTimeZoneRule(name, initialRaw, initialDst, |
| 234 | dtr, ar1->getStartYear() - 1, AnnualTimeZoneRule::MAX_YEAR); |
| 235 | |
| 236 | // Check if this rule start after the first rule after the specified date |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 237 | avail = ar2->getNextStart(date, tr.getFrom()->getRawOffset(), tr.getFrom()->getDSTSavings(), false, d); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 238 | if (!avail || d <= nextTransitionTime) { |
| 239 | // We cannot use this rule as the second transition rule |
| 240 | delete ar2; |
| 241 | ar2 = NULL; |
| 242 | } |
| 243 | } |
| 244 | } |
| 245 | } |
| 246 | if (ar2 == NULL) { |
| 247 | // Cannot find a good pair of AnnualTimeZoneRule |
| 248 | delete ar1; |
| 249 | ar1 = NULL; |
| 250 | } else { |
| 251 | // The initial rule should represent the rule before the previous transition |
| 252 | ar1->getName(initialName); |
| 253 | initialRaw = ar1->getRawOffset(); |
| 254 | initialDst = ar1->getDSTSavings(); |
| 255 | } |
| 256 | } |
| 257 | } |
| 258 | else { |
| 259 | // Try the previous one |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 260 | avail = getPreviousTransition(date, true, tr); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 261 | if (avail) { |
| 262 | tr.getTo()->getName(initialName); |
| 263 | initialRaw = tr.getTo()->getRawOffset(); |
| 264 | initialDst = tr.getTo()->getDSTSavings(); |
| 265 | } else { |
| 266 | // No transitions in the past. Just use the current offsets |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 267 | getOffset(date, false, initialRaw, initialDst, status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 268 | if (U_FAILURE(status)) { |
| 269 | return; |
| 270 | } |
| 271 | } |
| 272 | } |
| 273 | // Set the initial rule |
| 274 | initial = new InitialTimeZoneRule(initialName, initialRaw, initialDst); |
| 275 | |
| 276 | // Set the standard and daylight saving rules |
| 277 | if (ar1 != NULL && ar2 != NULL) { |
| 278 | if (ar1->getDSTSavings() != 0) { |
| 279 | dst = ar1; |
| 280 | std = ar2; |
| 281 | } else { |
| 282 | std = ar1; |
| 283 | dst = ar2; |
| 284 | } |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | void |
| 289 | BasicTimeZone::getTimeZoneRulesAfter(UDate start, InitialTimeZoneRule*& initial, |
| 290 | UVector*& transitionRules, UErrorCode& status) const { |
| 291 | if (U_FAILURE(status)) { |
| 292 | return; |
| 293 | } |
| 294 | |
| 295 | const InitialTimeZoneRule *orgini; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 296 | TimeZoneTransition tzt; |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 297 | bool avail; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 298 | int32_t ruleCount; |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 299 | TimeZoneRule *r = nullptr; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 300 | UnicodeString name; |
| 301 | int32_t i; |
| 302 | UDate time, t; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 303 | UDate firstStart; |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 304 | UBool bFinalStd = false, bFinalDst = false; |
| 305 | |
| 306 | initial = nullptr; |
| 307 | transitionRules = nullptr; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 308 | |
| 309 | // Original transition rules |
| 310 | ruleCount = countTransitionRules(status); |
| 311 | if (U_FAILURE(status)) { |
| 312 | return; |
| 313 | } |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 314 | LocalPointer<UVector> orgRules( |
| 315 | new UVector(uprv_deleteUObject, nullptr, ruleCount, status), status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 316 | if (U_FAILURE(status)) { |
| 317 | return; |
| 318 | } |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 319 | LocalMemory<const TimeZoneRule *> orgtrs( |
| 320 | static_cast<const TimeZoneRule **>(uprv_malloc(sizeof(TimeZoneRule*)*ruleCount))); |
| 321 | if (orgtrs.isNull()) { |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 322 | status = U_MEMORY_ALLOCATION_ERROR; |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 323 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 324 | } |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 325 | getTimeZoneRules(orgini, &orgtrs[0], ruleCount, status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 326 | if (U_FAILURE(status)) { |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 327 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 328 | } |
| 329 | for (i = 0; i < ruleCount; i++) { |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 330 | LocalPointer<TimeZoneRule> lpRule(orgtrs[i]->clone(), status); |
| 331 | orgRules->adoptElement(lpRule.orphan(), status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 332 | if (U_FAILURE(status)) { |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 333 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 334 | } |
| 335 | } |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 336 | |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 337 | avail = getPreviousTransition(start, true, tzt); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 338 | if (!avail) { |
| 339 | // No need to filter out rules only applicable to time before the start |
| 340 | initial = orgini->clone(); |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 341 | if (initial == nullptr) { |
| 342 | status = U_MEMORY_ALLOCATION_ERROR; |
| 343 | return; |
| 344 | } |
| 345 | transitionRules = orgRules.orphan(); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 346 | return; |
| 347 | } |
| 348 | |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 349 | LocalMemory<bool> done(static_cast<bool *>(uprv_malloc(sizeof(bool)*ruleCount))); |
| 350 | if (done.isNull()) { |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 351 | status = U_MEMORY_ALLOCATION_ERROR; |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 352 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 353 | } |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 354 | LocalPointer<UVector> filteredRules( |
| 355 | new UVector(uprv_deleteUObject, nullptr, status), status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 356 | if (U_FAILURE(status)) { |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 357 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 358 | } |
| 359 | |
| 360 | // Create initial rule |
| 361 | tzt.getTo()->getName(name); |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 362 | LocalPointer<InitialTimeZoneRule> res_initial( |
| 363 | new InitialTimeZoneRule(name, tzt.getTo()->getRawOffset(), tzt.getTo()->getDSTSavings()), status); |
| 364 | if (U_FAILURE(status)) { |
| 365 | return; |
| 366 | } |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 367 | |
| 368 | // Mark rules which does not need to be processed |
| 369 | for (i = 0; i < ruleCount; i++) { |
| 370 | r = (TimeZoneRule*)orgRules->elementAt(i); |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 371 | avail = r->getNextStart(start, res_initial->getRawOffset(), res_initial->getDSTSavings(), false, time); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 372 | done[i] = !avail; |
| 373 | } |
| 374 | |
| 375 | time = start; |
| 376 | while (!bFinalStd || !bFinalDst) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 377 | avail = getNextTransition(time, false, tzt); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 378 | if (!avail) { |
| 379 | break; |
| 380 | } |
| 381 | UDate updatedTime = tzt.getTime(); |
| 382 | if (updatedTime == time) { |
| 383 | // Can get here if rules for start & end of daylight time have exactly |
| 384 | // the same time. |
| 385 | // TODO: fix getNextTransition() to prevent it? |
| 386 | status = U_INVALID_STATE_ERROR; |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 387 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 388 | } |
| 389 | time = updatedTime; |
| 390 | |
| 391 | const TimeZoneRule *toRule = tzt.getTo(); |
| 392 | for (i = 0; i < ruleCount; i++) { |
| 393 | r = (TimeZoneRule*)orgRules->elementAt(i); |
| 394 | if (*r == *toRule) { |
| 395 | break; |
| 396 | } |
| 397 | } |
| 398 | if (i >= ruleCount) { |
| 399 | // This case should never happen |
| 400 | status = U_INVALID_STATE_ERROR; |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 401 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 402 | } |
| 403 | if (done[i]) { |
| 404 | continue; |
| 405 | } |
| 406 | const TimeArrayTimeZoneRule *tar = dynamic_cast<const TimeArrayTimeZoneRule *>(toRule); |
| 407 | const AnnualTimeZoneRule *ar; |
| 408 | if (tar != NULL) { |
| 409 | // Get the previous raw offset and DST savings before the very first start time |
| 410 | TimeZoneTransition tzt0; |
| 411 | t = start; |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 412 | while (true) { |
| 413 | avail = getNextTransition(t, false, tzt0); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 414 | if (!avail) { |
| 415 | break; |
| 416 | } |
| 417 | if (*(tzt0.getTo()) == *tar) { |
| 418 | break; |
| 419 | } |
| 420 | t = tzt0.getTime(); |
| 421 | } |
| 422 | if (avail) { |
| 423 | // Check if the entire start times to be added |
| 424 | tar->getFirstStart(tzt.getFrom()->getRawOffset(), tzt.getFrom()->getDSTSavings(), firstStart); |
| 425 | if (firstStart > start) { |
| 426 | // Just add the rule as is |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 427 | LocalPointer<TimeArrayTimeZoneRule> lpTar(tar->clone(), status); |
| 428 | filteredRules->adoptElement(lpTar.orphan(), status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 429 | if (U_FAILURE(status)) { |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 430 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 431 | } |
| 432 | } else { |
Frank Tang | 7e7574b | 2021-04-13 21:19:13 -0700 | [diff] [blame] | 433 | // Collect transitions after the start time |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 434 | int32_t startTimes; |
| 435 | DateTimeRule::TimeRuleType timeType; |
| 436 | int32_t idx; |
| 437 | |
| 438 | startTimes = tar->countStartTimes(); |
| 439 | timeType = tar->getTimeType(); |
| 440 | for (idx = 0; idx < startTimes; idx++) { |
| 441 | tar->getStartTimeAt(idx, t); |
| 442 | if (timeType == DateTimeRule::STANDARD_TIME) { |
| 443 | t -= tzt.getFrom()->getRawOffset(); |
| 444 | } |
| 445 | if (timeType == DateTimeRule::WALL_TIME) { |
| 446 | t -= tzt.getFrom()->getDSTSavings(); |
| 447 | } |
| 448 | if (t > start) { |
| 449 | break; |
| 450 | } |
| 451 | } |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 452 | if (U_FAILURE(status)) { |
| 453 | return; |
| 454 | } |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 455 | int32_t asize = startTimes - idx; |
| 456 | if (asize > 0) { |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 457 | LocalMemory<UDate> newTimes(static_cast<UDate *>(uprv_malloc(sizeof(UDate) * asize))); |
| 458 | if (newTimes.isNull()) { |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 459 | status = U_MEMORY_ALLOCATION_ERROR; |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 460 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 461 | } |
| 462 | for (int32_t newidx = 0; newidx < asize; newidx++) { |
| 463 | tar->getStartTimeAt(idx + newidx, newTimes[newidx]); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 464 | } |
| 465 | tar->getName(name); |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 466 | LocalPointer<TimeArrayTimeZoneRule> newTar(new TimeArrayTimeZoneRule( |
| 467 | name, tar->getRawOffset(), tar->getDSTSavings(), &newTimes[0], asize, timeType), status); |
| 468 | filteredRules->adoptElement(newTar.orphan(), status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 469 | if (U_FAILURE(status)) { |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 470 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 471 | } |
| 472 | } |
| 473 | } |
| 474 | } |
| 475 | } else if ((ar = dynamic_cast<const AnnualTimeZoneRule *>(toRule)) != NULL) { |
| 476 | ar->getFirstStart(tzt.getFrom()->getRawOffset(), tzt.getFrom()->getDSTSavings(), firstStart); |
| 477 | if (firstStart == tzt.getTime()) { |
| 478 | // Just add the rule as is |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 479 | LocalPointer<AnnualTimeZoneRule> arClone(ar->clone(), status); |
| 480 | filteredRules->adoptElement(arClone.orphan(), status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 481 | if (U_FAILURE(status)) { |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 482 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 483 | } |
| 484 | } else { |
| 485 | // Calculate the transition year |
| 486 | int32_t year, month, dom, dow, doy, mid; |
| 487 | Grego::timeToFields(tzt.getTime(), year, month, dom, dow, doy, mid); |
| 488 | // Re-create the rule |
| 489 | ar->getName(name); |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 490 | LocalPointer<AnnualTimeZoneRule> newAr(new AnnualTimeZoneRule(name, ar->getRawOffset(), ar->getDSTSavings(), |
| 491 | *(ar->getRule()), year, ar->getEndYear()), status); |
| 492 | filteredRules->adoptElement(newAr.orphan(), status); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 493 | if (U_FAILURE(status)) { |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 494 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 495 | } |
| 496 | } |
| 497 | // check if this is a final rule |
| 498 | if (ar->getEndYear() == AnnualTimeZoneRule::MAX_YEAR) { |
| 499 | // After bot final standard and dst rules are processed, |
| 500 | // exit this while loop. |
| 501 | if (ar->getDSTSavings() == 0) { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 502 | bFinalStd = true; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 503 | } else { |
Frank Tang | 1f164ee | 2022-11-08 12:31:27 -0800 | [diff] [blame^] | 504 | bFinalDst = true; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 505 | } |
| 506 | } |
| 507 | } |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 508 | done[i] = true; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | // Set the results |
Frank Tang | 3e05d9d | 2021-11-08 14:04:04 -0800 | [diff] [blame] | 512 | initial = res_initial.orphan(); |
| 513 | transitionRules = filteredRules.orphan(); |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 514 | return; |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | void |
Frank Tang | 7e7574b | 2021-04-13 21:19:13 -0700 | [diff] [blame] | 518 | BasicTimeZone::getOffsetFromLocal(UDate /*date*/, UTimeZoneLocalOption /*nonExistingTimeOpt*/, |
| 519 | UTimeZoneLocalOption /*duplicatedTimeOpt*/, |
| 520 | int32_t& /*rawOffset*/, int32_t& /*dstOffset*/, |
| 521 | UErrorCode& status) const { |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 522 | if (U_FAILURE(status)) { |
| 523 | return; |
| 524 | } |
| 525 | status = U_UNSUPPORTED_ERROR; |
| 526 | } |
| 527 | |
Frank Tang | 7e7574b | 2021-04-13 21:19:13 -0700 | [diff] [blame] | 528 | void BasicTimeZone::getOffsetFromLocal(UDate date, int32_t nonExistingTimeOpt, int32_t duplicatedTimeOpt, |
| 529 | int32_t& rawOffset, int32_t& dstOffset, |
| 530 | UErrorCode& status) const { |
| 531 | getOffsetFromLocal(date, (UTimeZoneLocalOption)nonExistingTimeOpt, |
| 532 | (UTimeZoneLocalOption)duplicatedTimeOpt, rawOffset, dstOffset, status); |
| 533 | } |
| 534 | |
jshin@chromium.org | 6f31ac3 | 2014-03-26 22:15:14 +0000 | [diff] [blame] | 535 | U_NAMESPACE_END |
| 536 | |
| 537 | #endif /* #if !UCONFIG_NO_FORMATTING */ |
| 538 | |
| 539 | //eof |