Bug Summary

File:root/firefox-clang/intl/icu/source/i18n/olsontz.cpp
Warning:line 607, column 16
The left operand of '!=' is a garbage value

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 olsontz.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/olsontz.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) 2003-2013, International Business Machines
6* Corporation and others. All Rights Reserved.
7**********************************************************************
8* Author: Alan Liu
9* Created: July 21 2003
10* Since: ICU 2.8
11**********************************************************************
12*/
13
14#include "utypeinfo.h" // for 'typeid' to work
15
16#include "olsontz.h"
17
18#if !UCONFIG_NO_FORMATTING0
19
20#include "unicode/ures.h"
21#include "unicode/simpletz.h"
22#include "unicode/gregocal.h"
23#include "gregoimp.h"
24#include "cmemory.h"
25#include "uassert.h"
26#include "uvector.h"
27#include <float.h> // DBL_MAX
28#include "uresimp.h"
29#include "zonemeta.h"
30#include "umutex.h"
31
32#ifdef U_DEBUG_TZ
33# include <stdio.h>
34# include "uresimp.h" // for debugging
35
36static void debug_tz_loc(const char *f, int32_t l)
37{
38 fprintf(stderrstderr, "%s:%d: ", f, l);
39}
40
41static void debug_tz_msg(const char *pat, ...)
42{
43 va_list ap;
44 va_start(ap, pat)__builtin_va_start(ap, pat);
45 vfprintf(stderrstderr, pat, ap);
46 fflush(stderrstderr);
47}
48// must use double parens, i.e.: U_DEBUG_TZ_MSG(("four is: %d",4));
49#define U_DEBUG_TZ_MSG(x) {debug_tz_loc(__FILE__"/root/firefox-clang/intl/icu/source/i18n/olsontz.cpp",__LINE__49);debug_tz_msg x;}
50#else
51#define U_DEBUG_TZ_MSG(x)
52#endif
53
54static UBool arrayEqual(const void *a1, const void *a2, int32_t size) {
55 if (a1 == nullptr && a2 == nullptr) {
56 return true;
57 }
58 if ((a1 != nullptr && a2 == nullptr) || (a1 == nullptr && a2 != nullptr)) {
59 return false;
60 }
61 if (a1 == a2) {
62 return true;
63 }
64
65 return (uprv_memcmp(a1, a2, size):: memcmp(a1, a2,size) == 0);
66}
67
68U_NAMESPACE_BEGINnamespace icu_77 {
69
70#define kTRANS"trans" "trans"
71#define kTRANSPRE32"transPre32" "transPre32"
72#define kTRANSPOST32"transPost32" "transPost32"
73#define kTYPEOFFSETS"typeOffsets" "typeOffsets"
74#define kTYPEMAP"typeMap" "typeMap"
75#define kLINKS"links" "links"
76#define kFINALRULE"finalRule" "finalRule"
77#define kFINALRAW"finalRaw" "finalRaw"
78#define kFINALYEAR"finalYear" "finalYear"
79
80#define SECONDS_PER_DAY(24*60*60) (24*60*60)
81
82static const int32_t ZEROS[] = {0,0};
83
84UOBJECT_DEFINE_RTTI_IMPLEMENTATION(OlsonTimeZone)UClassID OlsonTimeZone::getStaticClassID() { static char classID
= 0; return (UClassID)&classID; } UClassID OlsonTimeZone
::getDynamicClassID() const { return OlsonTimeZone::getStaticClassID
(); }
85
86/**
87 * Default constructor. Creates a time zone with an empty ID and
88 * a fixed GMT offset of zero.
89 */
90/*OlsonTimeZone::OlsonTimeZone() : finalYear(INT32_MAX), finalMillis(DBL_MAX), finalZone(0), transitionRulesInitialized(false) {
91 clearTransitionRules();
92 constructEmpty();
93}*/
94
95/**
96 * Construct a GMT+0 zone with no transitions. This is done when a
97 * constructor fails so the resultant object is well-behaved.
98 */
99void OlsonTimeZone::constructEmpty() {
100 canonicalID = nullptr;
101
102 transitionCountPre32 = transitionCount32 = transitionCountPost32 = 0;
103 transitionTimesPre32 = transitionTimes32 = transitionTimesPost32 = nullptr;
104
105 typeMapData = nullptr;
106
107 typeCount = 1;
108 typeOffsets = ZEROS;
109
110 finalZone = nullptr;
111}
112
113/**
114 * Construct from a resource bundle
115 * @param top the top-level zoneinfo resource bundle. This is used
116 * to lookup the rule that `res' may refer to, if there is one.
117 * @param res the resource bundle of the zone to be constructed
118 * @param ec input-output error code
119 */
120OlsonTimeZone::OlsonTimeZone(const UResourceBundle* top,
121 const UResourceBundle* res,
122 const UnicodeString& tzid,
123 UErrorCode& ec) :
124 BasicTimeZone(tzid), finalZone(nullptr)
125{
126 clearTransitionRules();
127 U_DEBUG_TZ_MSG(("OlsonTimeZone(%s)\n", ures_getKey((UResourceBundle*)res)));
128 if ((top == nullptr || res == nullptr) && U_SUCCESS(ec)) {
129 ec = U_ILLEGAL_ARGUMENT_ERROR;
130 }
131 if (U_SUCCESS(ec)) {
132 // TODO -- clean up -- Doesn't work if res points to an alias
133 // // TODO remove nonconst casts below when ures_* API is fixed
134 // setID(ures_getKey((UResourceBundle*) res)); // cast away const
135
136 int32_t len;
137 StackUResourceBundle r;
138
139 // Pre-32bit second transitions
140 ures_getByKeyures_getByKey_77(res, kTRANSPRE32"transPre32", r.getAlias(), &ec);
141 transitionTimesPre32 = ures_getIntVectorures_getIntVector_77(r.getAlias(), &len, &ec);
142 transitionCountPre32 = static_cast<int16_t>(len >> 1);
143 if (ec == U_MISSING_RESOURCE_ERROR) {
144 // No pre-32bit transitions
145 transitionTimesPre32 = nullptr;
146 transitionCountPre32 = 0;
147 ec = U_ZERO_ERROR;
148 } else if (U_SUCCESS(ec) && (len < 0 || len > 0x7FFF || (len & 1) != 0) /* len must be even */) {
149 ec = U_INVALID_FORMAT_ERROR;
150 }
151
152 // 32bit second transitions
153 ures_getByKeyures_getByKey_77(res, kTRANS"trans", r.getAlias(), &ec);
154 transitionTimes32 = ures_getIntVectorures_getIntVector_77(r.getAlias(), &len, &ec);
155 transitionCount32 = static_cast<int16_t>(len);
156 if (ec == U_MISSING_RESOURCE_ERROR) {
157 // No 32bit transitions
158 transitionTimes32 = nullptr;
159 transitionCount32 = 0;
160 ec = U_ZERO_ERROR;
161 } else if (U_SUCCESS(ec) && (len < 0 || len > 0x7FFF)) {
162 ec = U_INVALID_FORMAT_ERROR;
163 }
164
165 // Post-32bit second transitions
166 ures_getByKeyures_getByKey_77(res, kTRANSPOST32"transPost32", r.getAlias(), &ec);
167 transitionTimesPost32 = ures_getIntVectorures_getIntVector_77(r.getAlias(), &len, &ec);
168 transitionCountPost32 = static_cast<int16_t>(len >> 1);
169 if (ec == U_MISSING_RESOURCE_ERROR) {
170 // No pre-32bit transitions
171 transitionTimesPost32 = nullptr;
172 transitionCountPost32 = 0;
173 ec = U_ZERO_ERROR;
174 } else if (U_SUCCESS(ec) && (len < 0 || len > 0x7FFF || (len & 1) != 0) /* len must be even */) {
175 ec = U_INVALID_FORMAT_ERROR;
176 }
177
178 // Type offsets list must be of even size, with size >= 2
179 ures_getByKeyures_getByKey_77(res, kTYPEOFFSETS"typeOffsets", r.getAlias(), &ec);
180 typeOffsets = ures_getIntVectorures_getIntVector_77(r.getAlias(), &len, &ec);
181 if (U_SUCCESS(ec) && (len < 2 || len > 0x7FFE || (len & 1) != 0)) {
182 ec = U_INVALID_FORMAT_ERROR;
183 }
184 typeCount = static_cast<int16_t>(len) >> 1;
185
186 // Type map data must be of the same size as the transition count
187 typeMapData = nullptr;
188 if (transitionCount() > 0) {
189 ures_getByKeyures_getByKey_77(res, kTYPEMAP"typeMap", r.getAlias(), &ec);
190 typeMapData = ures_getBinaryures_getBinary_77(r.getAlias(), &len, &ec);
191 if (ec == U_MISSING_RESOURCE_ERROR) {
192 // no type mapping data
193 ec = U_INVALID_FORMAT_ERROR;
194 } else if (U_SUCCESS(ec) && len != transitionCount()) {
195 ec = U_INVALID_FORMAT_ERROR;
196 }
197 }
198
199 // Process final rule and data, if any
200 if (U_SUCCESS(ec)) {
201 const char16_t *ruleIdUStr = ures_getStringByKeyures_getStringByKey_77(res, kFINALRULE"finalRule", &len, &ec);
202 ures_getByKeyures_getByKey_77(res, kFINALRAW"finalRaw", r.getAlias(), &ec);
203 int32_t ruleRaw = ures_getIntures_getInt_77(r.getAlias(), &ec);
204 ures_getByKeyures_getByKey_77(res, kFINALYEAR"finalYear", r.getAlias(), &ec);
205 int32_t ruleYear = ures_getIntures_getInt_77(r.getAlias(), &ec);
206 if (U_SUCCESS(ec)) {
207 UnicodeString ruleID(true, ruleIdUStr, len);
208 UResourceBundle *rule = TimeZone::loadRule(top, ruleID, nullptr, ec);
209 const int32_t *ruleData = ures_getIntVectorures_getIntVector_77(rule, &len, &ec);
210 if (U_SUCCESS(ec) && len == 11) {
211 UnicodeString emptyStr;
212 finalZone = new SimpleTimeZone(
213 ruleRaw * U_MILLIS_PER_SECOND(1000),
214 emptyStr,
215 static_cast<int8_t>(ruleData[0]), static_cast<int8_t>(ruleData[1]), static_cast<int8_t>(ruleData[2]),
216 ruleData[3] * U_MILLIS_PER_SECOND(1000),
217 static_cast<SimpleTimeZone::TimeMode>(ruleData[4]),
218 static_cast<int8_t>(ruleData[5]), static_cast<int8_t>(ruleData[6]), static_cast<int8_t>(ruleData[7]),
219 ruleData[8] * U_MILLIS_PER_SECOND(1000),
220 static_cast<SimpleTimeZone::TimeMode>(ruleData[9]),
221 ruleData[10] * U_MILLIS_PER_SECOND(1000), ec);
222 if (finalZone == nullptr) {
223 ec = U_MEMORY_ALLOCATION_ERROR;
224 } else {
225 finalStartYear = ruleYear;
226
227 // Note: Setting finalStartYear to the finalZone is problematic. When a date is around
228 // year boundary, SimpleTimeZone may return false result when DST is observed at the
229 // beginning of year. We could apply safe margin (day or two), but when one of recurrent
230 // rules falls around year boundary, it could return false result. Without setting the
231 // start year, finalZone works fine around the year boundary of the start year.
232
233 // finalZone->setStartYear(finalStartYear);
234
235
236 // Compute the millis for Jan 1, 0:00 GMT of the finalYear
237
238 // Note: finalStartMillis is used for detecting either if
239 // historic transition data or finalZone to be used. In an
240 // extreme edge case - for example, two transitions fall into
241 // small windows of time around the year boundary, this may
242 // result incorrect offset computation. But I think it will
243 // never happen practically. Yoshito - Feb 20, 2010
244 finalStartMillis = Grego::fieldsToDay(finalStartYear, 0, 1) * U_MILLIS_PER_DAY(86400000);
245 }
246 } else {
247 ec = U_INVALID_FORMAT_ERROR;
248 }
249 ures_closeures_close_77(rule);
250 } else if (ec == U_MISSING_RESOURCE_ERROR) {
251 // No final zone
252 ec = U_ZERO_ERROR;
253 }
254 }
255
256 // initialize canonical ID
257 canonicalID = ZoneMeta::getCanonicalCLDRID(tzid, ec);
258 }
259
260 if (U_FAILURE(ec)) {
261 constructEmpty();
262 }
263}
264
265/**
266 * Copy constructor
267 */
268OlsonTimeZone::OlsonTimeZone(const OlsonTimeZone& other) :
269 BasicTimeZone(other), finalZone(nullptr) {
270 *this = other;
271}
272
273/**
274 * Assignment operator
275 */
276OlsonTimeZone& OlsonTimeZone::operator=(const OlsonTimeZone& other) {
277 if (this == &other) { return *this; } // self-assignment: no-op
278 canonicalID = other.canonicalID;
279
280 transitionTimesPre32 = other.transitionTimesPre32;
281 transitionTimes32 = other.transitionTimes32;
282 transitionTimesPost32 = other.transitionTimesPost32;
283
284 transitionCountPre32 = other.transitionCountPre32;
285 transitionCount32 = other.transitionCount32;
286 transitionCountPost32 = other.transitionCountPost32;
287
288 typeCount = other.typeCount;
289 typeOffsets = other.typeOffsets;
290 typeMapData = other.typeMapData;
291
292 delete finalZone;
293 finalZone = other.finalZone != nullptr ? other.finalZone->clone() : nullptr;
294
295 finalStartYear = other.finalStartYear;
296 finalStartMillis = other.finalStartMillis;
297
298 clearTransitionRules();
299
300 return *this;
301}
302
303/**
304 * Destructor
305 */
306OlsonTimeZone::~OlsonTimeZone() {
307 deleteTransitionRules();
308 delete finalZone;
309}
310
311/**
312 * Returns true if the two TimeZone objects are equal.
313 */
314bool OlsonTimeZone::operator==(const TimeZone& other) const {
315 return ((this == &other) ||
316 (typeid(*this) == typeid(other) &&
317 TimeZone::operator==(other) &&
318 hasSameRules(other)));
319}
320
321/**
322 * TimeZone API.
323 */
324OlsonTimeZone* OlsonTimeZone::clone() const {
325 return new OlsonTimeZone(*this);
326}
327
328/**
329 * TimeZone API.
330 */
331int32_t OlsonTimeZone::getOffset(uint8_t era, int32_t year, int32_t month,
332 int32_t dom, uint8_t dow,
333 int32_t millis, UErrorCode& ec) const {
334 if (month < UCAL_JANUARY || month > UCAL_DECEMBER) {
335 if (U_SUCCESS(ec)) {
336 ec = U_ILLEGAL_ARGUMENT_ERROR;
337 }
338 return 0;
339 } else {
340 return getOffset(era, year, month, dom, dow, millis,
341 Grego::monthLength(year, month),
342 ec);
343 }
344}
345
346/**
347 * TimeZone API.
348 */
349int32_t OlsonTimeZone::getOffset(uint8_t era, int32_t year, int32_t month,
350 int32_t dom, uint8_t dow,
351 int32_t millis, int32_t monthLength,
352 UErrorCode& ec) const {
353 if (U_FAILURE(ec)) {
354 return 0;
355 }
356
357 if ((era != GregorianCalendar::AD && era != GregorianCalendar::BC)
358 || month < UCAL_JANUARY
359 || month > UCAL_DECEMBER
360 || dom < 1
361 || dom > monthLength
362 || dow < UCAL_SUNDAY
363 || dow > UCAL_SATURDAY
364 || millis < 0
365 || millis >= U_MILLIS_PER_DAY(86400000)
366 || monthLength < 28
367 || monthLength > 31) {
368 ec = U_ILLEGAL_ARGUMENT_ERROR;
369 return 0;
370 }
371
372 if (era == GregorianCalendar::BC) {
373 year = -year;
374 }
375
376 if (finalZone != nullptr && year >= finalStartYear) {
377 return finalZone->getOffset(era, year, month, dom, dow,
378 millis, monthLength, ec);
379 }
380
381 // Compute local epoch millis from input fields
382 UDate date = static_cast<UDate>(Grego::fieldsToDay(year, month, dom) * U_MILLIS_PER_DAY(86400000) + millis);
383 int32_t rawoff, dstoff;
384 getHistoricalOffset(date, true, kDaylight, kStandard, rawoff, dstoff);
385 return rawoff + dstoff;
386}
387
388/**
389 * TimeZone API.
390 */
391void OlsonTimeZone::getOffset(UDate date, UBool local, int32_t& rawoff,
392 int32_t& dstoff, UErrorCode& ec) const {
393 if (U_FAILURE(ec)) {
3
←
Taking true branch
→
394 return;
4
←
Returning without writing to 'dstoff'
→
395 }
396 if (finalZone != nullptr && date >= finalStartMillis) {
397 finalZone->getOffset(date, local, rawoff, dstoff, ec);
398 } else {
399 getHistoricalOffset(date, local, kFormer, kLatter, rawoff, dstoff);
400 }
401}
402
403void OlsonTimeZone::getOffsetFromLocal(UDate date, UTimeZoneLocalOption nonExistingTimeOpt,
404 UTimeZoneLocalOption duplicatedTimeOpt,
405 int32_t& rawoff, int32_t& dstoff, UErrorCode& ec) const {
406 if (U_FAILURE(ec)) {
407 return;
408 }
409 if (finalZone != nullptr && date >= finalStartMillis) {
410 finalZone->getOffsetFromLocal(date, nonExistingTimeOpt, duplicatedTimeOpt, rawoff, dstoff, ec);
411 } else {
412 getHistoricalOffset(date, true, nonExistingTimeOpt, duplicatedTimeOpt, rawoff, dstoff);
413 }
414}
415
416
417/**
418 * TimeZone API.
419 */
420void OlsonTimeZone::setRawOffset(int32_t /*offsetMillis*/) {
421 // We don't support this operation, since OlsonTimeZones are
422 // immutable (except for the ID, which is in the base class).
423
424 // Nothing to do!
425}
426
427/**
428 * TimeZone API.
429 */
430int32_t OlsonTimeZone::getRawOffset() const {
431 UErrorCode ec = U_ZERO_ERROR;
432 int32_t raw, dst;
433 getOffset(uprv_getUTCtimeuprv_getUTCtime_77(), false, raw, dst, ec);
434 return raw;
435}
436
437#if defined U_DEBUG_TZ
438void printTime(double ms) {
439 int32_t year;
440 int8_t month, dom, dow;
441 int32_t millis=0;
442 UErrorCode status = U_ZERO_ERROR;
443 Grego::timeToFields(ms, year, month, dom, dow, millis, status);
444 U_DEBUG_TZ_MSG((" getHistoricalOffset: time %.1f (%04d.%02d.%02d+%.1fh)\n", ms,
445 year, month+1, dom, (millis/kOneHour)));
446 }
447#endif
448
449int64_t
450OlsonTimeZone::transitionTimeInSeconds(int16_t transIdx) const {
451 U_ASSERT(transIdx >= 0 && transIdx < transitionCount())(static_cast <bool> (transIdx >= 0 && transIdx
< transitionCount()) ? void (0) : __assert_fail ("transIdx >= 0 && transIdx < transitionCount()"
, __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__
));
452
453 if (transIdx < transitionCountPre32) {
454 return (static_cast<int64_t>(static_cast<uint32_t>(transitionTimesPre32[transIdx << 1])) << 32)
455 | static_cast<int64_t>(static_cast<uint32_t>(transitionTimesPre32[(transIdx << 1) + 1]));
456 }
457
458 transIdx -= transitionCountPre32;
459 if (transIdx < transitionCount32) {
460 return static_cast<int64_t>(transitionTimes32[transIdx]);
461 }
462
463 transIdx -= transitionCount32;
464 return (static_cast<int64_t>(static_cast<uint32_t>(transitionTimesPost32[transIdx << 1])) << 32)
465 | static_cast<int64_t>(static_cast<uint32_t>(transitionTimesPost32[(transIdx << 1) + 1]));
466}
467
468// Maximum absolute offset in seconds (86400 seconds = 1 day)
469// getHistoricalOffset uses this constant as safety margin of
470// quick zone transition checking.
471#define MAX_OFFSET_SECONDS86400 86400
472
473void
474OlsonTimeZone::getHistoricalOffset(UDate date, UBool local,
475 int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt,
476 int32_t& rawoff, int32_t& dstoff) const {
477 U_DEBUG_TZ_MSG(("getHistoricalOffset(%.1f, %s, %d, %d, raw, dst)\n",
478 date, local?"T":"F", NonExistingTimeOpt, DuplicatedTimeOpt));
479#if defined U_DEBUG_TZ
480 printTime(date*1000.0);
481#endif
482 int16_t transCount = transitionCount();
483
484 if (transCount > 0) {
485 double sec = uprv_flooruprv_floor_77(date / U_MILLIS_PER_SECOND(1000));
486 if (!local && sec < transitionTimeInSeconds(0)) {
487 // Before the first transition time
488 rawoff = initialRawOffset() * U_MILLIS_PER_SECOND(1000);
489 dstoff = initialDstOffset() * U_MILLIS_PER_SECOND(1000);
490 } else {
491 // Linear search from the end is the fastest approach, since
492 // most lookups will happen at/near the end.
493 int16_t transIdx;
494 for (transIdx = transCount - 1; transIdx >= 0; transIdx--) {
495 int64_t transition = transitionTimeInSeconds(transIdx);
496
497 if (local && (sec >= (transition - MAX_OFFSET_SECONDS86400))) {
498 int32_t offsetBefore = zoneOffsetAt(transIdx - 1);
499 UBool dstBefore = dstOffsetAt(transIdx - 1) != 0;
500
501 int32_t offsetAfter = zoneOffsetAt(transIdx);
502 UBool dstAfter = dstOffsetAt(transIdx) != 0;
503
504 UBool dstToStd = dstBefore && !dstAfter;
505 UBool stdToDst = !dstBefore && dstAfter;
506
507 if (offsetAfter - offsetBefore >= 0) {
508 // Positive transition, which makes a non-existing local time range
509 if (((NonExistingTimeOpt & kStdDstMask) == kStandard && dstToStd)
510 || ((NonExistingTimeOpt & kStdDstMask) == kDaylight && stdToDst)) {
511 transition += offsetBefore;
512 } else if (((NonExistingTimeOpt & kStdDstMask) == kStandard && stdToDst)
513 || ((NonExistingTimeOpt & kStdDstMask) == kDaylight && dstToStd)) {
514 transition += offsetAfter;
515 } else if ((NonExistingTimeOpt & kFormerLatterMask) == kLatter) {
516 transition += offsetBefore;
517 } else {
518 // Interprets the time with rule before the transition,
519 // default for non-existing time range
520 transition += offsetAfter;
521 }
522 } else {
523 // Negative transition, which makes a duplicated local time range
524 if (((DuplicatedTimeOpt & kStdDstMask) == kStandard && dstToStd)
525 || ((DuplicatedTimeOpt & kStdDstMask) == kDaylight && stdToDst)) {
526 transition += offsetAfter;
527 } else if (((DuplicatedTimeOpt & kStdDstMask) == kStandard && stdToDst)
528 || ((DuplicatedTimeOpt & kStdDstMask) == kDaylight && dstToStd)) {
529 transition += offsetBefore;
530 } else if ((DuplicatedTimeOpt & kFormerLatterMask) == kFormer) {
531 transition += offsetBefore;
532 } else {
533 // Interprets the time with rule after the transition,
534 // default for duplicated local time range
535 transition += offsetAfter;
536 }
537 }
538 }
539 if (sec >= transition) {
540 break;
541 }
542 }
543 // transIdx could be -1 when local=true
544 rawoff = rawOffsetAt(transIdx) * U_MILLIS_PER_SECOND(1000);
545 dstoff = dstOffsetAt(transIdx) * U_MILLIS_PER_SECOND(1000);
546 }
547 } else {
548 // No transitions, single pair of offsets only
549 rawoff = initialRawOffset() * U_MILLIS_PER_SECOND(1000);
550 dstoff = initialDstOffset() * U_MILLIS_PER_SECOND(1000);
551 }
552 U_DEBUG_TZ_MSG(("getHistoricalOffset(%.1f, %s, %d, %d, raw, dst) - raw=%d, dst=%d\n",
553 date, local?"T":"F", NonExistingTimeOpt, DuplicatedTimeOpt, rawoff, dstoff));
554}
555
556/**
557 * TimeZone API.
558 */
559UBool OlsonTimeZone::useDaylightTime() const {
560 // If DST was observed in 1942 (for example) but has never been
561 // observed from 1943 to the present, most clients will expect
562 // this method to return false. This method determines whether
563 // DST is in use in the current year (at any point in the year)
564 // and returns true if so.
565
566 UDate current = uprv_getUTCtimeuprv_getUTCtime_77();
567 if (finalZone != nullptr && current >= finalStartMillis) {
568 return finalZone->useDaylightTime();
569 }
570
571 UErrorCode status = U_ZERO_ERROR;
572 int32_t year = Grego::timeToYear(current, status);
573 U_ASSERT(U_SUCCESS(status))(static_cast <bool> (U_SUCCESS(status)) ? void (0) : __assert_fail
("U_SUCCESS(status)", __builtin_FILE (), __builtin_LINE (), __extension__
__PRETTY_FUNCTION__));
574 if (U_FAILURE(status)) return false; // If error, just return false.
575
576 // Find start of this year, and start of next year
577 double start = Grego::fieldsToDay(year, 0, 1) * SECONDS_PER_DAY(24*60*60);
578 double limit = Grego::fieldsToDay(year+1, 0, 1) * SECONDS_PER_DAY(24*60*60);
579
580 // Return true if DST is observed at any time during the current
581 // year.
582 for (int16_t i = 0; i < transitionCount(); ++i) {
583 double transition = static_cast<double>(transitionTimeInSeconds(i));
584 if (transition >= limit) {
585 break;
586 }
587 if ((transition >= start && dstOffsetAt(i) != 0)
588 || (transition > start && dstOffsetAt(i - 1) != 0)) {
589 return true;
590 }
591 }
592 return false;
593}
594int32_t
595OlsonTimeZone::getDSTSavings() const{
596 if (finalZone != nullptr){
597 return finalZone->getDSTSavings();
598 }
599 return TimeZone::getDSTSavings();
600}
601/**
602 * TimeZone API.
603 */
604UBool OlsonTimeZone::inDaylightTime(UDate date, UErrorCode& ec) const {
605 int32_t raw, dst;
1
'dst' declared without an initial value
→
606 getOffset(date, false, raw, dst, ec);
2
←
Calling 'OlsonTimeZone::getOffset'
→
5
←
Returning from 'OlsonTimeZone::getOffset'
→
607 return dst != 0;
6
←
The left operand of '!=' is a garbage value
608}
609
610UBool
611OlsonTimeZone::hasSameRules(const TimeZone &other) const {
612 if (this == &other) {
613 return true;
614 }
615 const OlsonTimeZone* z = dynamic_cast<const OlsonTimeZone*>(&other);
616 if (z == nullptr) {
617 return false;
618 }
619
620 // [sic] pointer comparison: typeMapData points into
621 // memory-mapped or DLL space, so if two zones have the same
622 // pointer, they are equal.
623 if (typeMapData == z->typeMapData) {
624 return true;
625 }
626
627 // If the pointers are not equal, the zones may still
628 // be equal if their rules and transitions are equal
629 if ((finalZone == nullptr && z->finalZone != nullptr)
630 || (finalZone != nullptr && z->finalZone == nullptr)
631 || (finalZone != nullptr && z->finalZone != nullptr && *finalZone != *z->finalZone)) {
632 return false;
633 }
634
635 if (finalZone != nullptr) {
636 if (finalStartYear != z->finalStartYear || finalStartMillis != z->finalStartMillis) {
637 return false;
638 }
639 }
640 if (typeCount != z->typeCount
641 || transitionCountPre32 != z->transitionCountPre32
642 || transitionCount32 != z->transitionCount32
643 || transitionCountPost32 != z->transitionCountPost32) {
644 return false;
645 }
646
647 return
648 arrayEqual(transitionTimesPre32, z->transitionTimesPre32, sizeof(transitionTimesPre32[0]) * transitionCountPre32 << 1)
649 && arrayEqual(transitionTimes32, z->transitionTimes32, sizeof(transitionTimes32[0]) * transitionCount32)
650 && arrayEqual(transitionTimesPost32, z->transitionTimesPost32, sizeof(transitionTimesPost32[0]) * transitionCountPost32 << 1)
651 && arrayEqual(typeOffsets, z->typeOffsets, sizeof(typeOffsets[0]) * typeCount << 1)
652 && arrayEqual(typeMapData, z->typeMapData, sizeof(typeMapData[0]) * transitionCount());
653}
654
655void
656OlsonTimeZone::clearTransitionRules() {
657 initialRule = nullptr;
658 firstTZTransition = nullptr;
659 firstFinalTZTransition = nullptr;
660 historicRules = nullptr;
661 historicRuleCount = 0;
662 finalZoneWithStartYear = nullptr;
663 firstTZTransitionIdx = 0;
664 transitionRulesInitOnce.reset();
665}
666
667void
668OlsonTimeZone::deleteTransitionRules() {
669 delete initialRule;
670 delete firstTZTransition;
671 delete firstFinalTZTransition;
672 delete finalZoneWithStartYear;
673 if (historicRules != nullptr) {
674 for (int i = 0; i < historicRuleCount; i++) {
675 if (historicRules[i] != nullptr) {
676 delete historicRules[i];
677 }
678 }
679 uprv_freeuprv_free_77(historicRules);
680 }
681 clearTransitionRules();
682}
683
684/*
685 * Lazy transition rules initializer
686 */
687
688static void U_CALLCONV initRules(OlsonTimeZone *This, UErrorCode &status) {
689 This->initTransitionRules(status);
690}
691
692void
693OlsonTimeZone::checkTransitionRules(UErrorCode& status) const {
694 OlsonTimeZone *ncThis = const_cast<OlsonTimeZone *>(this);
695 umtx_initOnce(ncThis->transitionRulesInitOnce, &initRules, ncThis, status);
696}
697
698void
699OlsonTimeZone::initTransitionRules(UErrorCode& status) {
700 if(U_FAILURE(status)) {
701 return;
702 }
703 deleteTransitionRules();
704 UnicodeString tzid;
705 getID(tzid);
706
707 UnicodeString stdName = tzid + UNICODE_STRING_SIMPLE("(STD)")icu::UnicodeString(true, u"(STD)", -1);
708 UnicodeString dstName = tzid + UNICODE_STRING_SIMPLE("(DST)")icu::UnicodeString(true, u"(DST)", -1);
709
710 int32_t raw, dst;
711
712 // Create initial rule
713 raw = initialRawOffset() * U_MILLIS_PER_SECOND(1000);
714 dst = initialDstOffset() * U_MILLIS_PER_SECOND(1000);
715 initialRule = new InitialTimeZoneRule((dst == 0 ? stdName : dstName), raw, dst);
716 // Check to make sure initialRule was created
717 if (initialRule == nullptr) {
718 status = U_MEMORY_ALLOCATION_ERROR;
719 deleteTransitionRules();
720 return;
721 }
722
723 int32_t transCount = transitionCount();
724 if (transCount > 0) {
725 int16_t transitionIdx, typeIdx;
726
727 // We probably no longer need to check the first "real" transition
728 // here, because the new tzcode remove such transitions already.
729 // For now, keeping this code for just in case. Feb 19, 2010 Yoshito
730 firstTZTransitionIdx = 0;
731 for (transitionIdx = 0; transitionIdx < transCount; transitionIdx++) {
732 if (typeMapData[transitionIdx] != 0) { // type 0 is the initial type
733 break;
734 }
735 firstTZTransitionIdx++;
736 }
737 if (transitionIdx == transCount) {
738 // Actually no transitions...
739 } else {
740 // Build historic rule array
741 UDate* times = static_cast<UDate*>(uprv_mallocuprv_malloc_77(sizeof(UDate) * transCount)); /* large enough to store all transition times */
742 if (times == nullptr) {
743 status = U_MEMORY_ALLOCATION_ERROR;
744 deleteTransitionRules();
745 return;
746 }
747 for (typeIdx = 0; typeIdx < typeCount; typeIdx++) {
748 // Gather all start times for each pair of offsets
749 int32_t nTimes = 0;
750 for (transitionIdx = firstTZTransitionIdx; transitionIdx < transCount; transitionIdx++) {
751 if (typeIdx == static_cast<int16_t>(typeMapData[transitionIdx])) {
752 UDate tt = static_cast<UDate>(transitionTime(transitionIdx));
753 if (finalZone == nullptr || tt <= finalStartMillis) {
754 // Exclude transitions after finalMillis
755 times[nTimes++] = tt;
756 }
757 }
758 }
759 if (nTimes > 0) {
760 // Create a TimeArrayTimeZoneRule
761 raw = typeOffsets[typeIdx << 1] * U_MILLIS_PER_SECOND(1000);
762 dst = typeOffsets[(typeIdx << 1) + 1] * U_MILLIS_PER_SECOND(1000);
763 if (historicRules == nullptr) {
764 historicRuleCount = typeCount;
765 historicRules = static_cast<TimeArrayTimeZoneRule**>(uprv_mallocuprv_malloc_77(sizeof(TimeArrayTimeZoneRule*) * historicRuleCount));
766 if (historicRules == nullptr) {
767 status = U_MEMORY_ALLOCATION_ERROR;
768 deleteTransitionRules();
769 uprv_freeuprv_free_77(times);
770 return;
771 }
772 for (int i = 0; i < historicRuleCount; i++) {
773 // Initialize TimeArrayTimeZoneRule pointers as nullptr
774 historicRules[i] = nullptr;
775 }
776 }
777 historicRules[typeIdx] = new TimeArrayTimeZoneRule((dst == 0 ? stdName : dstName),
778 raw, dst, times, nTimes, DateTimeRule::UTC_TIME);
779 // Check for memory allocation error
780 if (historicRules[typeIdx] == nullptr) {
781 status = U_MEMORY_ALLOCATION_ERROR;
782 deleteTransitionRules();
783 return;
784 }
785 }
786 }
787 uprv_freeuprv_free_77(times);
788
789 // Create initial transition
790 typeIdx = static_cast<int16_t>(typeMapData[firstTZTransitionIdx]);
791 firstTZTransition = new TimeZoneTransition(static_cast<UDate>(transitionTime(firstTZTransitionIdx)),
792 *initialRule, *historicRules[typeIdx]);
793 // Check to make sure firstTZTransition was created.
794 if (firstTZTransition == nullptr) {
795 status = U_MEMORY_ALLOCATION_ERROR;
796 deleteTransitionRules();
797 return;
798 }
799 }
800 }
801 if (finalZone != nullptr) {
802 // Get the first occurrence of final rule starts
803 UDate startTime = static_cast<UDate>(finalStartMillis);
804 TimeZoneRule *firstFinalRule = nullptr;
805
806 if (finalZone->useDaylightTime()) {
807 /*
808 * Note: When an OlsonTimeZone is constructed, we should set the final year
809 * as the start year of finalZone. However, the boundary condition used for
810 * getting offset from finalZone has some problems.
811 * For now, we do not set the valid start year when the construction time
812 * and create a clone and set the start year when extracting rules.
813 */
814 finalZoneWithStartYear = finalZone->clone();
815 // Check to make sure finalZone was actually cloned.
816 if (finalZoneWithStartYear == nullptr) {
817 status = U_MEMORY_ALLOCATION_ERROR;
818 deleteTransitionRules();
819 return;
820 }
821 finalZoneWithStartYear->setStartYear(finalStartYear);
822
823 TimeZoneTransition tzt;
824 finalZoneWithStartYear->getNextTransition(startTime, false, tzt);
825 firstFinalRule = tzt.getTo()->clone();
826 // Check to make sure firstFinalRule received proper clone.
827 if (firstFinalRule == nullptr) {
828 status = U_MEMORY_ALLOCATION_ERROR;
829 deleteTransitionRules();
830 return;
831 }
832 startTime = tzt.getTime();
833 } else {
834 // final rule with no transitions
835 finalZoneWithStartYear = finalZone->clone();
836 // Check to make sure finalZone was actually cloned.
837 if (finalZoneWithStartYear == nullptr) {
838 status = U_MEMORY_ALLOCATION_ERROR;
839 deleteTransitionRules();
840 return;
841 }
842 finalZone->getID(tzid);
843 firstFinalRule = new TimeArrayTimeZoneRule(tzid,
844 finalZone->getRawOffset(), 0, &startTime, 1, DateTimeRule::UTC_TIME);
845 // Check firstFinalRule was properly created.
846 if (firstFinalRule == nullptr) {
847 status = U_MEMORY_ALLOCATION_ERROR;
848 deleteTransitionRules();
849 return;
850 }
851 }
852 TimeZoneRule *prevRule = nullptr;
853 if (transCount > 0) {
854 prevRule = historicRules[typeMapData[transCount - 1]];
855 }
856 if (prevRule == nullptr) {
857 // No historic transitions, but only finalZone available
858 prevRule = initialRule;
859 }
860 firstFinalTZTransition = new TimeZoneTransition();
861 // Check to make sure firstFinalTZTransition was created before dereferencing
862 if (firstFinalTZTransition == nullptr) {
863 status = U_MEMORY_ALLOCATION_ERROR;
864 deleteTransitionRules();
865 return;
866 }
867 firstFinalTZTransition->setTime(startTime);
868 firstFinalTZTransition->adoptFrom(prevRule->clone());
869 firstFinalTZTransition->adoptTo(firstFinalRule);
870 }
871}
872
873UBool
874OlsonTimeZone::getNextTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const {
875 UErrorCode status = U_ZERO_ERROR;
876 checkTransitionRules(status);
877 if (U_FAILURE(status)) {
878 return false;
879 }
880
881 if (finalZone != nullptr) {
882 if (inclusive && base == firstFinalTZTransition->getTime()) {
883 result = *firstFinalTZTransition;
884 return true;
885 } else if (base >= firstFinalTZTransition->getTime()) {
886 if (finalZone->useDaylightTime()) {
887 //return finalZone->getNextTransition(base, inclusive, result);
888 return finalZoneWithStartYear->getNextTransition(base, inclusive, result);
889 } else {
890 // No more transitions
891 return false;
892 }
893 }
894 }
895 if (historicRules != nullptr) {
896 // Find a historical transition
897 int16_t transCount = transitionCount();
898 int16_t ttidx = transCount - 1;
899 for (; ttidx >= firstTZTransitionIdx; ttidx--) {
900 UDate t = static_cast<UDate>(transitionTime(ttidx));
901 if (base > t || (!inclusive && base == t)) {
902 break;
903 }
904 }
905 if (ttidx == transCount - 1) {
906 if (firstFinalTZTransition != nullptr) {
907 result = *firstFinalTZTransition;
908 return true;
909 } else {
910 return false;
911 }
912 } else if (ttidx < firstTZTransitionIdx) {
913 result = *firstTZTransition;
914 return true;
915 } else {
916 // Create a TimeZoneTransition
917 TimeZoneRule *to = historicRules[typeMapData[ttidx + 1]];
918 TimeZoneRule *from = historicRules[typeMapData[ttidx]];
919 UDate startTime = static_cast<UDate>(transitionTime(ttidx + 1));
920
921 // The transitions loaded from zoneinfo.res may contain non-transition data
922 UnicodeString fromName, toName;
923 from->getName(fromName);
924 to->getName(toName);
925 if (fromName == toName && from->getRawOffset() == to->getRawOffset()
926 && from->getDSTSavings() == to->getDSTSavings()) {
927 return getNextTransition(startTime, false, result);
928 }
929 result.setTime(startTime);
930 result.adoptFrom(from->clone());
931 result.adoptTo(to->clone());
932 return true;
933 }
934 }
935 return false;
936}
937
938UBool
939OlsonTimeZone::getPreviousTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const {
940 UErrorCode status = U_ZERO_ERROR;
941 checkTransitionRules(status);
942 if (U_FAILURE(status)) {
943 return false;
944 }
945
946 if (finalZone != nullptr) {
947 if (inclusive && base == firstFinalTZTransition->getTime()) {
948 result = *firstFinalTZTransition;
949 return true;
950 } else if (base > firstFinalTZTransition->getTime()) {
951 if (finalZone->useDaylightTime()) {
952 //return finalZone->getPreviousTransition(base, inclusive, result);
953 return finalZoneWithStartYear->getPreviousTransition(base, inclusive, result);
954 } else {
955 result = *firstFinalTZTransition;
956 return true;
957 }
958 }
959 }
960
961 if (historicRules != nullptr) {
962 // Find a historical transition
963 int16_t ttidx = transitionCount() - 1;
964 for (; ttidx >= firstTZTransitionIdx; ttidx--) {
965 UDate t = static_cast<UDate>(transitionTime(ttidx));
966 if (base > t || (inclusive && base == t)) {
967 break;
968 }
969 }
970 if (ttidx < firstTZTransitionIdx) {
971 // No more transitions
972 return false;
973 } else if (ttidx == firstTZTransitionIdx) {
974 result = *firstTZTransition;
975 return true;
976 } else {
977 // Create a TimeZoneTransition
978 TimeZoneRule *to = historicRules[typeMapData[ttidx]];
979 TimeZoneRule *from = historicRules[typeMapData[ttidx-1]];
980 UDate startTime = static_cast<UDate>(transitionTime(ttidx));
981
982 // The transitions loaded from zoneinfo.res may contain non-transition data
983 UnicodeString fromName, toName;
984 from->getName(fromName);
985 to->getName(toName);
986 if (fromName == toName && from->getRawOffset() == to->getRawOffset()
987 && from->getDSTSavings() == to->getDSTSavings()) {
988 return getPreviousTransition(startTime, false, result);
989 }
990 result.setTime(startTime);
991 result.adoptFrom(from->clone());
992 result.adoptTo(to->clone());
993 return true;
994 }
995 }
996 return false;
997}
998
999int32_t
1000OlsonTimeZone::countTransitionRules(UErrorCode& status) const {
1001 if (U_FAILURE(status)) {
1002 return 0;
1003 }
1004 checkTransitionRules(status);
1005 if (U_FAILURE(status)) {
1006 return 0;
1007 }
1008
1009 int32_t count = 0;
1010 if (historicRules != nullptr) {
1011 // historicRules may contain null entries when original zoneinfo data
1012 // includes non transition data.
1013 for (int32_t i = 0; i < historicRuleCount; i++) {
1014 if (historicRules[i] != nullptr) {
1015 count++;
1016 }
1017 }
1018 }
1019 if (finalZone != nullptr) {
1020 if (finalZone->useDaylightTime()) {
1021 count += 2;
1022 } else {
1023 count++;
1024 }
1025 }
1026 return count;
1027}
1028
1029void
1030OlsonTimeZone::getTimeZoneRules(const InitialTimeZoneRule*& initial,
1031 const TimeZoneRule* trsrules[],
1032 int32_t& trscount,
1033 UErrorCode& status) const {
1034 if (U_FAILURE(status)) {
1035 return;
1036 }
1037 checkTransitionRules(status);
1038 if (U_FAILURE(status)) {
1039 return;
1040 }
1041
1042 // Initial rule
1043 initial = initialRule;
1044
1045 // Transition rules
1046 int32_t cnt = 0;
1047 if (historicRules != nullptr && trscount > cnt) {
1048 // historicRules may contain null entries when original zoneinfo data
1049 // includes non transition data.
1050 for (int32_t i = 0; i < historicRuleCount; i++) {
1051 if (historicRules[i] != nullptr) {
1052 trsrules[cnt++] = historicRules[i];
1053 if (cnt >= trscount) {
1054 break;
1055 }
1056 }
1057 }
1058 }
1059 if (finalZoneWithStartYear != nullptr && trscount > cnt) {
1060 const InitialTimeZoneRule *tmpini;
1061 int32_t tmpcnt = trscount - cnt;
1062 finalZoneWithStartYear->getTimeZoneRules(tmpini, &trsrules[cnt], tmpcnt, status);
1063 if (U_FAILURE(status)) {
1064 return;
1065 }
1066 cnt += tmpcnt;
1067 }
1068 // Set the result length
1069 trscount = cnt;
1070}
1071
1072U_NAMESPACE_END}
1073
1074#endif // !UCONFIG_NO_FORMATTING
1075
1076//eof