Bug Summary

File:root/firefox-clang/intl/icu/source/i18n/rbtz.cpp
Warning:line 89, column 24
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name rbtz.cpp -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -ffp-contract=off -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/root/firefox-clang/obj-x86_64-pc-linux-gnu/config/external/icu/i18n -fcoverage-compilation-dir=/root/firefox-clang/obj-x86_64-pc-linux-gnu/config/external/icu/i18n -resource-dir /usr/lib/llvm-21/lib/clang/21 -include /root/firefox-clang/config/gcc_hidden.h -include /root/firefox-clang/obj-x86_64-pc-linux-gnu/mozilla-config.h -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/system_wrappers -U _FORTIFY_SOURCE -D _FORTIFY_SOURCE=2 -D _GLIBCXX_ASSERTIONS -D DEBUG=1 -D U_I18N_IMPLEMENTATION -D _LIBCPP_DISABLE_DEPRECATION_WARNINGS -D U_USING_ICU_NAMESPACE=0 -D U_NO_DEFAULT_INCLUDE_UTF_HEADERS=1 -D U_HIDE_OBSOLETE_UTF_OLD_H=1 -D UCONFIG_NO_LEGACY_CONVERSION -D UCONFIG_NO_TRANSLITERATION -D UCONFIG_NO_REGULAR_EXPRESSIONS -D UCONFIG_NO_BREAK_ITERATION -D UCONFIG_NO_IDNA -D UCONFIG_NO_MF2 -D U_CHARSET_IS_UTF8 -D UNISTR_FROM_CHAR_EXPLICIT=explicit -D UNISTR_FROM_STRING_EXPLICIT=explicit -D U_ENABLE_DYLOAD=0 -D U_DEBUG=1 -I /root/firefox-clang/config/external/icu/i18n -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/config/external/icu/i18n -I /root/firefox-clang/intl/icu/source/common -I /root/firefox-clang/mfbt/double-conversion -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include/nspr -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include/nss -D MOZILLA_CLIENT -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/backward -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-error=pessimizing-move -Wno-error=large-by-value-copy=128 -Wno-error=implicit-int-float-conversion -Wno-error=thread-safety-analysis -Wno-error=tautological-type-limit-compare -Wno-invalid-offsetof -Wno-range-loop-analysis -Wno-deprecated-anon-enum-enum-conversion -Wno-deprecated-enum-enum-conversion -Wno-deprecated-this-capture -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wno-psabi -Wno-error=builtin-macro-redefined -Wno-vla-cxx-extension -Wno-unknown-warning-option -Wno-comma -Wno-implicit-const-int-float-conversion -Wno-macro-redefined -Wno-microsoft-include -Wno-tautological-unsigned-enum-zero-compare -Wno-unreachable-code-loop-increment -Wno-unreachable-code-return -fdeprecated-macro -ferror-limit 19 -fstrict-flex-arrays=1 -stack-protector 2 -fstack-clash-protection -ftrivial-auto-var-init=pattern -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fno-sized-deallocation -fno-aligned-allocation -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2025-06-30-093548-1913035-1 -x c++ /root/firefox-clang/intl/icu/source/i18n/rbtz.cpp
1// © 2016 and later: Unicode, Inc. and others.
2// License & terms of use: http://www.unicode.org/copyright.html
3/*
4*******************************************************************************
5* Copyright (C) 2007-2013, International Business Machines Corporation and
6* others. All Rights Reserved.
7*******************************************************************************
8*/
9
10#include "utypeinfo.h" // for 'typeid' to work
11
12#include "unicode/utypes.h"
13
14#if !UCONFIG_NO_FORMATTING0
15
16#include "unicode/rbtz.h"
17#include "unicode/gregocal.h"
18#include "uvector.h"
19#include "gregoimp.h"
20#include "cmemory.h"
21#include "umutex.h"
22
23U_NAMESPACE_BEGINnamespace icu_77 {
24
25/**
26 * A struct representing a time zone transition
27 */
28struct Transition : public UMemory {
29 UDate time;
30 TimeZoneRule* from;
31 TimeZoneRule* to;
32};
33
34U_CDECL_BEGINextern "C" {
35static void U_CALLCONV
36deleteTransition(void* obj) {
37 delete static_cast<Transition *>(obj);
38}
39U_CDECL_END}
40
41static UBool compareRules(UVector* rules1, UVector* rules2) {
42 if (rules1 == nullptr && rules2 == nullptr) {
43 return true;
44 } else if (rules1 == nullptr || rules2 == nullptr) {
45 return false;
46 }
47 int32_t size = rules1->size();
48 if (size != rules2->size()) {
49 return false;
50 }
51 for (int32_t i = 0; i < size; i++) {
52 TimeZoneRule* r1 = static_cast<TimeZoneRule*>(rules1->elementAt(i));
53 TimeZoneRule* r2 = static_cast<TimeZoneRule*>(rules2->elementAt(i));
54 if (*r1 != *r2) {
55 return false;
56 }
57 }
58 return true;
59}
60
61UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RuleBasedTimeZone)UClassID RuleBasedTimeZone::getStaticClassID() { static char classID
= 0; return (UClassID)&classID; } UClassID RuleBasedTimeZone
::getDynamicClassID() const { return RuleBasedTimeZone::getStaticClassID
(); }
62
63RuleBasedTimeZone::RuleBasedTimeZone(const UnicodeString& id, InitialTimeZoneRule* initialRule)
64: BasicTimeZone(id), fInitialRule(initialRule), fHistoricRules(nullptr), fFinalRules(nullptr),
65 fHistoricTransitions(nullptr), fUpToDate(false) {
66}
67
68RuleBasedTimeZone::RuleBasedTimeZone(const RuleBasedTimeZone& source)
69: BasicTimeZone(source), fInitialRule(source.fInitialRule->clone()),
70 fHistoricTransitions(nullptr), fUpToDate(false) {
71 fHistoricRules = copyRules(source.fHistoricRules);
72 fFinalRules = copyRules(source.fFinalRules);
73 if (source.fUpToDate) {
74 UErrorCode status = U_ZERO_ERROR;
75 complete(status);
76 }
77}
78
79RuleBasedTimeZone::~RuleBasedTimeZone() {
80 deleteTransitions();
81 deleteRules();
82}
83
84RuleBasedTimeZone&
1
Assuming right == *this
→
85RuleBasedTimeZone::operator=(const RuleBasedTimeZone& right) {
86 if (*this != right) {
2
←
Assuming the condition is true
→
3
←
Taking true branch
→
87 BasicTimeZone::operator=(right);
88 deleteRules();
4
←
Calling 'RuleBasedTimeZone::deleteRules'
→
10
←
Returning from 'RuleBasedTimeZone::deleteRules'
→
89 fInitialRule = right.fInitialRule->clone();
11
←
Called C++ object pointer is null
90 fHistoricRules = copyRules(right.fHistoricRules);
91 fFinalRules = copyRules(right.fFinalRules);
92 deleteTransitions();
93 fUpToDate = false;
94 }
95 return *this;
96}
97
98bool
99RuleBasedTimeZone::operator==(const TimeZone& that) const {
100 if (this == &that) {
101 return true;
102 }
103 if (typeid(*this) != typeid(that) || !BasicTimeZone::operator==(that)) {
104 return false;
105 }
106 RuleBasedTimeZone *rbtz = (RuleBasedTimeZone*)&that;
107 if (*fInitialRule != *(rbtz->fInitialRule)) {
108 return false;
109 }
110 if (compareRules(fHistoricRules, rbtz->fHistoricRules)
111 && compareRules(fFinalRules, rbtz->fFinalRules)) {
112 return true;
113 }
114 return false;
115}
116
117bool
118RuleBasedTimeZone::operator!=(const TimeZone& that) const {
119 return !operator==(that);
120}
121
122void
123RuleBasedTimeZone::addTransitionRule(TimeZoneRule* rule, UErrorCode& status) {
124 LocalPointer<TimeZoneRule>lpRule(rule);
125 if (U_FAILURE(status)) {
126 return;
127 }
128 AnnualTimeZoneRule* atzrule = dynamic_cast<AnnualTimeZoneRule*>(rule);
129 if (atzrule != nullptr && atzrule->getEndYear() == AnnualTimeZoneRule::MAX_YEAR) {
130 // A final rule
131 if (fFinalRules == nullptr) {
132 LocalPointer<UVector> lpFinalRules(new UVector(uprv_deleteUObjectuprv_deleteUObject_77, nullptr, status), status);
133 if (U_FAILURE(status)) {
134 return;
135 }
136 fFinalRules = lpFinalRules.orphan();
137 } else if (fFinalRules->size() >= 2) {
138 // Cannot handle more than two final rules
139 status = U_INVALID_STATE_ERROR;
140 return;
141 }
142 fFinalRules->adoptElement(lpRule.orphan(), status);
143 } else {
144 // Non-final rule
145 if (fHistoricRules == nullptr) {
146 LocalPointer<UVector> lpHistoricRules(new UVector(uprv_deleteUObjectuprv_deleteUObject_77, nullptr, status), status);
147 if (U_FAILURE(status)) {
148 return;
149 }
150 fHistoricRules = lpHistoricRules.orphan();
151 }
152 fHistoricRules->adoptElement(lpRule.orphan(), status);
153 }
154 // Mark dirty, so transitions are recalculated at next complete() call
155 fUpToDate = false;
156}
157
158
159void
160RuleBasedTimeZone::completeConst(UErrorCode& status) const {
161 static UMutex gLock;
162 if (U_FAILURE(status)) {
163 return;
164 }
165 umtx_lockumtx_lock_77(&gLock);
166 if (!fUpToDate) {
167 RuleBasedTimeZone *ncThis = const_cast<RuleBasedTimeZone*>(this);
168 ncThis->complete(status);
169 }
170 umtx_unlockumtx_unlock_77(&gLock);
171}
172
173void
174RuleBasedTimeZone::complete(UErrorCode& status) {
175 if (U_FAILURE(status)) {
176 return;
177 }
178 if (fUpToDate) {
179 return;
180 }
181 // Make sure either no final rules or a pair of AnnualTimeZoneRules
182 // are available.
183 if (fFinalRules != nullptr && fFinalRules->size() != 2) {
184 status = U_INVALID_STATE_ERROR;
185 return;
186 }
187
188 // Create a TimezoneTransition and add to the list
189 if (fHistoricRules != nullptr || fFinalRules != nullptr) {
190 TimeZoneRule *curRule = fInitialRule;
191 UDate lastTransitionTime = MIN_MILLIS(((-0x7F000000) - 2440588) * (1.0 * (86400000)));
192
193 // Build the transition array which represents historical time zone
194 // transitions.
195 if (fHistoricRules != nullptr && fHistoricRules->size() > 0) {
196 int32_t i;
197 int32_t historicCount = fHistoricRules->size();
198 LocalMemory<bool> done(static_cast<bool*>(uprv_mallocuprv_malloc_77(sizeof(bool) * historicCount)));
199 if (done == nullptr) {
200 status = U_MEMORY_ALLOCATION_ERROR;
201 goto cleanup;
202 }
203 for (i = 0; i < historicCount; i++) {
204 done[i] = false;
205 }
206 while (true) {
207 int32_t curStdOffset = curRule->getRawOffset();
208 int32_t curDstSavings = curRule->getDSTSavings();
209 UDate nextTransitionTime = MAX_MILLIS(((+0x7F000000) - 2440588) * (1.0 * (86400000)));
210 TimeZoneRule *nextRule = nullptr;
211 TimeZoneRule *r = nullptr;
212 UBool avail;
213 UDate tt;
214 UnicodeString curName, name;
215 curRule->getName(curName);
216
217 for (i = 0; i < historicCount; i++) {
218 if (done[i]) {
219 continue;
220 }
221 r = static_cast<TimeZoneRule*>(fHistoricRules->elementAt(i));
222 avail = r->getNextStart(lastTransitionTime, curStdOffset, curDstSavings, false, tt);
223 if (!avail) {
224 // No more transitions from this rule - skip this rule next time
225 done[i] = true;
226 } else {
227 r->getName(name);
228 if (*r == *curRule ||
229 (name == curName && r->getRawOffset() == curRule->getRawOffset()
230 && r->getDSTSavings() == curRule->getDSTSavings())) {
231 continue;
232 }
233 if (tt < nextTransitionTime) {
234 nextTransitionTime = tt;
235 nextRule = r;
236 }
237 }
238 }
239
240 if (nextRule == nullptr) {
241 // Check if all historic rules are done
242 UBool bDoneAll = true;
243 for (int32_t j = 0; j < historicCount; j++) {
244 if (!done[j]) {
245 bDoneAll = false;
246 break;
247 }
248 }
249 if (bDoneAll) {
250 break;
251 }
252 }
253
254 if (fFinalRules != nullptr) {
255 // Check if one of final rules has earlier transition date
256 for (i = 0; i < 2 /* fFinalRules->size() */; i++) {
257 TimeZoneRule* fr = static_cast<TimeZoneRule*>(fFinalRules->elementAt(i));
258 if (*fr == *curRule) {
259 continue;
260 }
261 r = static_cast<TimeZoneRule*>(fFinalRules->elementAt(i));
262 avail = r->getNextStart(lastTransitionTime, curStdOffset, curDstSavings, false, tt);
263 if (avail) {
264 if (tt < nextTransitionTime) {
265 nextTransitionTime = tt;
266 nextRule = r;
267 }
268 }
269 }
270 }
271
272 if (nextRule == nullptr) {
273 // Nothing more
274 break;
275 }
276
277 if (fHistoricTransitions == nullptr) {
278 LocalPointer<UVector> lpHistoricTransitions(
279 new UVector(deleteTransition, nullptr, status), status);
280 if (U_FAILURE(status)) {
281 goto cleanup;
282 }
283 fHistoricTransitions = lpHistoricTransitions.orphan();
284 }
285 LocalPointer<Transition> trst(new Transition, status);
286 if (U_FAILURE(status)) {
287 goto cleanup;
288 }
289 trst->time = nextTransitionTime;
290 trst->from = curRule;
291 trst->to = nextRule;
292 fHistoricTransitions->adoptElement(trst.orphan(), status);
293 if (U_FAILURE(status)) {
294 goto cleanup;
295 }
296 lastTransitionTime = nextTransitionTime;
297 curRule = nextRule;
298 }
299 }
300 if (fFinalRules != nullptr) {
301 if (fHistoricTransitions == nullptr) {
302 LocalPointer<UVector> lpHistoricTransitions(
303 new UVector(deleteTransition, nullptr, status), status);
304 if (U_FAILURE(status)) {
305 goto cleanup;
306 }
307 fHistoricTransitions = lpHistoricTransitions.orphan();
308 }
309 // Append the first transition for each
310 TimeZoneRule* rule0 = static_cast<TimeZoneRule*>(fFinalRules->elementAt(0));
311 TimeZoneRule* rule1 = static_cast<TimeZoneRule*>(fFinalRules->elementAt(1));
312 UDate tt0, tt1;
313 UBool avail0 = rule0->getNextStart(lastTransitionTime, curRule->getRawOffset(), curRule->getDSTSavings(), false, tt0);
314 UBool avail1 = rule1->getNextStart(lastTransitionTime, curRule->getRawOffset(), curRule->getDSTSavings(), false, tt1);
315 if (!avail0 || !avail1) {
316 // Should not happen, because both rules are permanent
317 status = U_INVALID_STATE_ERROR;
318 goto cleanup;
319 }
320 LocalPointer<Transition> final0(new Transition, status);
321 LocalPointer<Transition> final1(new Transition, status);
322 if (U_FAILURE(status)) {
323 goto cleanup;
324 }
325 if (tt0 < tt1) {
326 final0->time = tt0;
327 final0->from = curRule;
328 final0->to = rule0;
329 rule1->getNextStart(tt0, rule0->getRawOffset(), rule0->getDSTSavings(), false, final1->time);
330 final1->from = rule0;
331 final1->to = rule1;
332 } else {
333 final0->time = tt1;
334 final0->from = curRule;
335 final0->to = rule1;
336 rule0->getNextStart(tt1, rule1->getRawOffset(), rule1->getDSTSavings(), false, final1->time);
337 final1->from = rule1;
338 final1->to = rule0;
339 }
340 fHistoricTransitions->adoptElement(final0.orphan(), status);
341 fHistoricTransitions->adoptElement(final1.orphan(), status);
342 if (U_FAILURE(status)) {
343 goto cleanup;
344 }
345 }
346 }
347 fUpToDate = true;
348 return;
349
350cleanup:
351 deleteTransitions();
352 fUpToDate = false;
353}
354
355RuleBasedTimeZone*
356RuleBasedTimeZone::clone() const {
357 return new RuleBasedTimeZone(*this);
358}
359
360int32_t
361RuleBasedTimeZone::getOffset(uint8_t era, int32_t year, int32_t month, int32_t day,
362 uint8_t dayOfWeek, int32_t millis, UErrorCode& status) const {
363 if (U_FAILURE(status)) {
364 return 0;
365 }
366 if (month < UCAL_JANUARY || month > UCAL_DECEMBER) {
367 status = U_ILLEGAL_ARGUMENT_ERROR;
368 return 0;
369 } else {
370 return getOffset(era, year, month, day, dayOfWeek, millis,
371 Grego::monthLength(year, month), status);
372 }
373}
374
375int32_t
376RuleBasedTimeZone::getOffset(uint8_t era, int32_t year, int32_t month, int32_t day,
377 uint8_t /*dayOfWeek*/, int32_t millis,
378 int32_t /*monthLength*/, UErrorCode& status) const {
379 // dayOfWeek and monthLength are unused
380 if (U_FAILURE(status)) {
381 return 0;
382 }
383 if (era == GregorianCalendar::BC) {
384 // Convert to extended year
385 year = 1 - year;
386 }
387 int32_t rawOffset, dstOffset;
388 UDate time = static_cast<UDate>(Grego::fieldsToDay(year, month, day)) * U_MILLIS_PER_DAY(86400000) + millis;
389 getOffsetInternal(time, true, kDaylight, kStandard, rawOffset, dstOffset, status);
390 if (U_FAILURE(status)) {
391 return 0;
392 }
393 return (rawOffset + dstOffset);
394}
395
396void
397RuleBasedTimeZone::getOffset(UDate date, UBool local, int32_t& rawOffset,
398 int32_t& dstOffset, UErrorCode& status) const {
399 getOffsetInternal(date, local, kFormer, kLatter, rawOffset, dstOffset, status);
400}
401
402void RuleBasedTimeZone::getOffsetFromLocal(UDate date, UTimeZoneLocalOption nonExistingTimeOpt,
403 UTimeZoneLocalOption duplicatedTimeOpt,
404 int32_t& rawOffset, int32_t& dstOffset, UErrorCode& status) const {
405 getOffsetInternal(date, true, nonExistingTimeOpt, duplicatedTimeOpt, rawOffset, dstOffset, status);
406}
407
408
409/*
410 * The internal getOffset implementation
411 */
412void
413RuleBasedTimeZone::getOffsetInternal(UDate date, UBool local,
414 int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt,
415 int32_t& rawOffset, int32_t& dstOffset,
416 UErrorCode& status) const {
417 rawOffset = 0;
418 dstOffset = 0;
419
420 if (U_FAILURE(status)) {
421 return;
422 }
423 if (!fUpToDate) {
424 // Transitions are not yet resolved. We cannot do it here
425 // because this method is const. Thus, do nothing and return
426 // error status.
427 status = U_INVALID_STATE_ERROR;
428 return;
429 }
430 const TimeZoneRule *rule = nullptr;
431 if (fHistoricTransitions == nullptr) {
432 rule = fInitialRule;
433 } else {
434 UDate tstart = getTransitionTime(static_cast<Transition*>(fHistoricTransitions->elementAt(0)),
435 local, NonExistingTimeOpt, DuplicatedTimeOpt);
436 if (date < tstart) {
437 rule = fInitialRule;
438 } else {
439 int32_t idx = fHistoricTransitions->size() - 1;
440 UDate tend = getTransitionTime(static_cast<Transition*>(fHistoricTransitions->elementAt(idx)),
441 local, NonExistingTimeOpt, DuplicatedTimeOpt);
442 if (date > tend) {
443 if (fFinalRules != nullptr) {
444 rule = findRuleInFinal(date, local, NonExistingTimeOpt, DuplicatedTimeOpt);
445 }
446 if (rule == nullptr) {
447 // no final rules or the given time is before the first transition
448 // specified by the final rules -> use the last rule
449 rule = static_cast<Transition*>(fHistoricTransitions->elementAt(idx))->to;
450 }
451 } else {
452 // Find a historical transition
453 while (idx >= 0) {
454 if (date >= getTransitionTime(static_cast<Transition*>(fHistoricTransitions->elementAt(idx)),
455 local, NonExistingTimeOpt, DuplicatedTimeOpt)) {
456 break;
457 }
458 idx--;
459 }
460 rule = static_cast<Transition*>(fHistoricTransitions->elementAt(idx))->to;
461 }
462 }
463 }
464 if (rule != nullptr) {
465 rawOffset = rule->getRawOffset();
466 dstOffset = rule->getDSTSavings();
467 }
468}
469
470void
471RuleBasedTimeZone::setRawOffset(int32_t /*offsetMillis*/) {
472 // We don't support this operation at this moment.
473 // Nothing to do!
474}
475
476int32_t
477RuleBasedTimeZone::getRawOffset() const {
478 // Note: This implementation returns standard GMT offset
479 // as of current time.
480 UErrorCode status = U_ZERO_ERROR;
481 int32_t raw, dst;
482 getOffset(uprv_getUTCtimeuprv_getUTCtime_77(), false, raw, dst, status);
483 return raw;
484}
485
486UBool
487RuleBasedTimeZone::useDaylightTime() const {
488 // Note: This implementation returns true when
489 // daylight saving time is used as of now or
490 // after the next transition.
491 UErrorCode status = U_ZERO_ERROR;
492 UDate now = uprv_getUTCtimeuprv_getUTCtime_77();
493 int32_t raw, dst;
494 getOffset(now, false, raw, dst, status);
495 if (dst != 0) {
496 return true;
497 }
498 // If DST is not used now, check if DST is used after the next transition
499 UDate time;
500 TimeZoneRule *from, *to;
501 UBool avail = findNext(now, false, time, from, to);
502 if (avail && to->getDSTSavings() != 0) {
503 return true;
504 }
505 return false;
506}
507
508UBool
509RuleBasedTimeZone::inDaylightTime(UDate date, UErrorCode& status) const {
510 if (U_FAILURE(status)) {
511 return false;
512 }
513 int32_t raw, dst;
514 getOffset(date, false, raw, dst, status);
515 if (dst != 0) {
516 return true;
517 }
518 return false;
519}
520
521UBool
522RuleBasedTimeZone::hasSameRules(const TimeZone& other) const {
523 if (this == &other) {
524 return true;
525 }
526 if (typeid(*this) != typeid(other)) {
527 return false;
528 }
529 const RuleBasedTimeZone& that = static_cast<const RuleBasedTimeZone&>(other);
530 if (*fInitialRule != *(that.fInitialRule)) {
531 return false;
532 }
533 if (compareRules(fHistoricRules, that.fHistoricRules)
534 && compareRules(fFinalRules, that.fFinalRules)) {
535 return true;
536 }
537 return false;
538}
539
540UBool
541RuleBasedTimeZone::getNextTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const {
542 UErrorCode status = U_ZERO_ERROR;
543 completeConst(status);
544 if (U_FAILURE(status)) {
545 return false;
546 }
547 UDate transitionTime;
548 TimeZoneRule *fromRule, *toRule;
549 UBool found = findNext(base, inclusive, transitionTime, fromRule, toRule);
550 if (found) {
551 result.setTime(transitionTime);
552 result.setFrom(*fromRule);
553 result.setTo(*toRule);
554 return true;
555 }
556 return false;
557}
558
559UBool
560RuleBasedTimeZone::getPreviousTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const {
561 UErrorCode status = U_ZERO_ERROR;
562 completeConst(status);
563 if (U_FAILURE(status)) {
564 return false;
565 }
566 UDate transitionTime;
567 TimeZoneRule *fromRule, *toRule;
568 UBool found = findPrev(base, inclusive, transitionTime, fromRule, toRule);
569 if (found) {
570 result.setTime(transitionTime);
571 result.setFrom(*fromRule);
572 result.setTo(*toRule);
573 return true;
574 }
575 return false;
576}
577
578int32_t
579RuleBasedTimeZone::countTransitionRules(UErrorCode& /*status*/) const {
580 int32_t count = 0;
581 if (fHistoricRules != nullptr) {
582 count += fHistoricRules->size();
583 }
584 if (fFinalRules != nullptr) {
585 count += fFinalRules->size();
586 }
587 return count;
588}
589
590void
591RuleBasedTimeZone::getTimeZoneRules(const InitialTimeZoneRule*& initial,
592 const TimeZoneRule* trsrules[],
593 int32_t& trscount,
594 UErrorCode& status) const {
595 if (U_FAILURE(status)) {
596 return;
597 }
598 // Initial rule
599 initial = fInitialRule;
600
601 // Transition rules
602 int32_t cnt = 0;
603 int32_t idx;
604 if (fHistoricRules != nullptr && cnt < trscount) {
605 int32_t historicCount = fHistoricRules->size();
606 idx = 0;
607 while (cnt < trscount && idx < historicCount) {
608 trsrules[cnt++] = static_cast<const TimeZoneRule*>(fHistoricRules->elementAt(idx++));
609 }
610 }
611 if (fFinalRules != nullptr && cnt < trscount) {
612 int32_t finalCount = fFinalRules->size();
613 idx = 0;
614 while (cnt < trscount && idx < finalCount) {
615 trsrules[cnt++] = static_cast<const TimeZoneRule*>(fFinalRules->elementAt(idx++));
616 }
617 }
618 // Set the result length
619 trscount = cnt;
620}
621
622void
623RuleBasedTimeZone::deleteRules() {
624 delete fInitialRule;
625 fInitialRule = nullptr;
5
←
Null pointer value stored to field 'fInitialRule'
→
626 if (fHistoricRules != nullptr) {
6
←
Assuming the condition is false
→
7
←
Taking false branch
→
627 delete fHistoricRules;
628 fHistoricRules = nullptr;
629 }
630 if (fFinalRules != nullptr) {
8
←
Assuming the condition is false
→
9
←
Taking false branch
→
631 delete fFinalRules;
632 fFinalRules = nullptr;
633 }
634}
635
636void
637RuleBasedTimeZone::deleteTransitions() {
638 delete fHistoricTransitions;
639 fHistoricTransitions = nullptr;
640}
641
642UVector*
643RuleBasedTimeZone::copyRules(UVector* source) {
644 if (source == nullptr) {
645 return nullptr;
646 }
647 UErrorCode ec = U_ZERO_ERROR;
648 int32_t size = source->size();
649 LocalPointer<UVector> rules(new UVector(uprv_deleteUObjectuprv_deleteUObject_77, nullptr, size, ec), ec);
650 if (U_FAILURE(ec)) {
651 return nullptr;
652 }
653 int32_t i;
654 for (i = 0; i < size; i++) {
655 LocalPointer<TimeZoneRule> rule(static_cast<TimeZoneRule*>(source->elementAt(i))->clone(), ec);
656 rules->adoptElement(rule.orphan(), ec);
657 if (U_FAILURE(ec)) {
658 return nullptr;
659 }
660 }
661 return rules.orphan();
662}
663
664TimeZoneRule*
665RuleBasedTimeZone::findRuleInFinal(UDate date, UBool local,
666 int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt) const {
667 if (fFinalRules == nullptr) {
668 return nullptr;
669 }
670
671 AnnualTimeZoneRule* fr0 = static_cast<AnnualTimeZoneRule*>(fFinalRules->elementAt(0));
672 AnnualTimeZoneRule* fr1 = static_cast<AnnualTimeZoneRule*>(fFinalRules->elementAt(1));
673 if (fr0 == nullptr || fr1 == nullptr) {
674 return nullptr;
675 }
676
677 UDate start0, start1;
678 UDate base;
679 int32_t localDelta;
680
681 base = date;
682 if (local) {
683 localDelta = getLocalDelta(fr1->getRawOffset(), fr1->getDSTSavings(),
684 fr0->getRawOffset(), fr0->getDSTSavings(),
685 NonExistingTimeOpt, DuplicatedTimeOpt);
686 base -= localDelta;
687 }
688 UBool avail0 = fr0->getPreviousStart(base, fr1->getRawOffset(), fr1->getDSTSavings(), true, start0);
689
690 base = date;
691 if (local) {
692 localDelta = getLocalDelta(fr0->getRawOffset(), fr0->getDSTSavings(),
693 fr1->getRawOffset(), fr1->getDSTSavings(),
694 NonExistingTimeOpt, DuplicatedTimeOpt);
695 base -= localDelta;
696 }
697 UBool avail1 = fr1->getPreviousStart(base, fr0->getRawOffset(), fr0->getDSTSavings(), true, start1);
698
699 if (!avail0 || !avail1) {
700 if (avail0) {
701 return fr0;
702 } else if (avail1) {
703 return fr1;
704 }
705 // Both rules take effect after the given time
706 return nullptr;
707 }
708
709 return (start0 > start1) ? fr0 : fr1;
710}
711
712UBool
713RuleBasedTimeZone::findNext(UDate base, UBool inclusive, UDate& transitionTime,
714 TimeZoneRule*& fromRule, TimeZoneRule*& toRule) const {
715 if (fHistoricTransitions == nullptr) {
716 return false;
717 }
718 UBool isFinal = false;
719 UBool found = false;
720 Transition result;
721 Transition* tzt = static_cast<Transition*>(fHistoricTransitions->elementAt(0));
722 UDate tt = tzt->time;
723 if (tt > base || (inclusive && tt == base)) {
724 result = *tzt;
725 found = true;
726 } else {
727 int32_t idx = fHistoricTransitions->size() - 1;
728 tzt = static_cast<Transition*>(fHistoricTransitions->elementAt(idx));
729 tt = tzt->time;
730 if (inclusive && tt == base) {
731 result = *tzt;
732 found = true;
733 } else if (tt <= base) {
734 if (fFinalRules != nullptr) {
735 // Find a transion time with finalRules
736 TimeZoneRule* r0 = static_cast<TimeZoneRule*>(fFinalRules->elementAt(0));
737 TimeZoneRule* r1 = static_cast<TimeZoneRule*>(fFinalRules->elementAt(1));
738 UDate start0, start1;
739 UBool avail0 = r0->getNextStart(base, r1->getRawOffset(), r1->getDSTSavings(), inclusive, start0);
740 UBool avail1 = r1->getNextStart(base, r0->getRawOffset(), r0->getDSTSavings(), inclusive, start1);
741 // avail0/avail1 should be always true
742 if (!avail0 && !avail1) {
743 return false;
744 }
745 if (!avail1 || start0 < start1) {
746 result.time = start0;
747 result.from = r1;
748 result.to = r0;
749 } else {
750 result.time = start1;
751 result.from = r0;
752 result.to = r1;
753 }
754 isFinal = true;
755 found = true;
756 }
757 } else {
758 // Find a transition within the historic transitions
759 idx--;
760 Transition *prev = tzt;
761 while (idx > 0) {
762 tzt = static_cast<Transition*>(fHistoricTransitions->elementAt(idx));
763 tt = tzt->time;
764 if (tt < base || (!inclusive && tt == base)) {
765 break;
766 }
767 idx--;
768 prev = tzt;
769 }
770 result.time = prev->time;
771 result.from = prev->from;
772 result.to = prev->to;
773 found = true;
774 }
775 }
776 if (found) {
777 // For now, this implementation ignore transitions with only zone name changes.
778 if (result.from->getRawOffset() == result.to->getRawOffset()
779 && result.from->getDSTSavings() == result.to->getDSTSavings()) {
780 if (isFinal) {
781 return false;
782 } else {
783 // No offset changes. Try next one if not final
784 return findNext(result.time, false /* always exclusive */,
785 transitionTime, fromRule, toRule);
786 }
787 }
788 transitionTime = result.time;
789 fromRule = result.from;
790 toRule = result.to;
791 return true;
792 }
793 return false;
794}
795
796UBool
797RuleBasedTimeZone::findPrev(UDate base, UBool inclusive, UDate& transitionTime,
798 TimeZoneRule*& fromRule, TimeZoneRule*& toRule) const {
799 if (fHistoricTransitions == nullptr) {
800 return false;
801 }
802 UBool found = false;
803 Transition result;
804 Transition* tzt = static_cast<Transition*>(fHistoricTransitions->elementAt(0));
805 UDate tt = tzt->time;
806 if (inclusive && tt == base) {
807 result = *tzt;
808 found = true;
809 } else if (tt < base) {
810 int32_t idx = fHistoricTransitions->size() - 1;
811 tzt = static_cast<Transition*>(fHistoricTransitions->elementAt(idx));
812 tt = tzt->time;
813 if (inclusive && tt == base) {
814 result = *tzt;
815 found = true;
816 } else if (tt < base) {
817 if (fFinalRules != nullptr) {
818 // Find a transion time with finalRules
819 TimeZoneRule* r0 = static_cast<TimeZoneRule*>(fFinalRules->elementAt(0));
820 TimeZoneRule* r1 = static_cast<TimeZoneRule*>(fFinalRules->elementAt(1));
821 UDate start0, start1;
822 UBool avail0 = r0->getPreviousStart(base, r1->getRawOffset(), r1->getDSTSavings(), inclusive, start0);
823 UBool avail1 = r1->getPreviousStart(base, r0->getRawOffset(), r0->getDSTSavings(), inclusive, start1);
824 // avail0/avail1 should be always true
825 if (!avail0 && !avail1) {
826 return false;
827 }
828 if (!avail1 || start0 > start1) {
829 result.time = start0;
830 result.from = r1;
831 result.to = r0;
832 } else {
833 result.time = start1;
834 result.from = r0;
835 result.to = r1;
836 }
837 } else {
838 result = *tzt;
839 }
840 found = true;
841 } else {
842 // Find a transition within the historic transitions
843 idx--;
844 while (idx >= 0) {
845 tzt = static_cast<Transition*>(fHistoricTransitions->elementAt(idx));
846 tt = tzt->time;
847 if (tt < base || (inclusive && tt == base)) {
848 break;
849 }
850 idx--;
851 }
852 result = *tzt;
853 found = true;
854 }
855 }
856 if (found) {
857 // For now, this implementation ignore transitions with only zone name changes.
858 if (result.from->getRawOffset() == result.to->getRawOffset()
859 && result.from->getDSTSavings() == result.to->getDSTSavings()) {
860 // No offset changes. Try next one if not final
861 return findPrev(result.time, false /* always exclusive */,
862 transitionTime, fromRule, toRule);
863 }
864 transitionTime = result.time;
865 fromRule = result.from;
866 toRule = result.to;
867 return true;
868 }
869 return false;
870}
871
872UDate
873RuleBasedTimeZone::getTransitionTime(Transition* transition, UBool local,
874 int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt) const {
875 UDate time = transition->time;
876 if (local) {
877 time += getLocalDelta(transition->from->getRawOffset(), transition->from->getDSTSavings(),
878 transition->to->getRawOffset(), transition->to->getDSTSavings(),
879 NonExistingTimeOpt, DuplicatedTimeOpt);
880 }
881 return time;
882}
883
884int32_t
885RuleBasedTimeZone::getLocalDelta(int32_t rawBefore, int32_t dstBefore, int32_t rawAfter, int32_t dstAfter,
886 int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt) const {
887 int32_t delta = 0;
888
889 int32_t offsetBefore = rawBefore + dstBefore;
890 int32_t offsetAfter = rawAfter + dstAfter;
891
892 UBool dstToStd = (dstBefore != 0) && (dstAfter == 0);
893 UBool stdToDst = (dstBefore == 0) && (dstAfter != 0);
894
895 if (offsetAfter - offsetBefore >= 0) {
896 // Positive transition, which makes a non-existing local time range
897 if (((NonExistingTimeOpt & kStdDstMask) == kStandard && dstToStd)
898 || ((NonExistingTimeOpt & kStdDstMask) == kDaylight && stdToDst)) {
899 delta = offsetBefore;
900 } else if (((NonExistingTimeOpt & kStdDstMask) == kStandard && stdToDst)
901 || ((NonExistingTimeOpt & kStdDstMask) == kDaylight && dstToStd)) {
902 delta = offsetAfter;
903 } else if ((NonExistingTimeOpt & kFormerLatterMask) == kLatter) {
904 delta = offsetBefore;
905 } else {
906 // Interprets the time with rule before the transition,
907 // default for non-existing time range
908 delta = offsetAfter;
909 }
910 } else {
911 // Negative transition, which makes a duplicated local time range
912 if (((DuplicatedTimeOpt & kStdDstMask) == kStandard && dstToStd)
913 || ((DuplicatedTimeOpt & kStdDstMask) == kDaylight && stdToDst)) {
914 delta = offsetAfter;
915 } else if (((DuplicatedTimeOpt & kStdDstMask) == kStandard && stdToDst)
916 || ((DuplicatedTimeOpt & kStdDstMask) == kDaylight && dstToStd)) {
917 delta = offsetBefore;
918 } else if ((DuplicatedTimeOpt & kFormerLatterMask) == kFormer) {
919 delta = offsetBefore;
920 } else {
921 // Interprets the time with rule after the transition,
922 // default for duplicated local time range
923 delta = offsetAfter;
924 }
925 }
926 return delta;
927}
928
929U_NAMESPACE_END}
930
931#endif /* #if !UCONFIG_NO_FORMATTING */
932
933//eof
934