1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 *******************************************************************************
5 * Copyright (C) 1997-2016, International Business Machines Corporation and
6 * others. All Rights Reserved.
7 *******************************************************************************
8 *
9 * File TIMEZONE.CPP
10 *
11 * Modification History:
12 *
13 * Date Name Description
14 * 12/05/96 clhuang Creation.
15 * 04/21/97 aliu General clean-up and bug fixing.
16 * 05/08/97 aliu Fixed Hashtable code per code review.
17 * 07/09/97 helena Changed createInstance to createDefault.
18 * 07/29/97 aliu Updated with all-new list of 96 UNIX-derived
19 * TimeZones. Changed mechanism to load from static
20 * array rather than resource bundle.
21 * 07/07/1998 srl Bugfixes from the Java side: UTC GMT CAT NST
22 * Added getDisplayName API
23 * going to add custom parsing.
24 *
25 * ISSUES:
26 * - should getDisplayName cache something?
27 * - should custom time zones be cached? [probably]
28 * 08/10/98 stephen Brought getDisplayName() API in-line w/ conventions
29 * 08/19/98 stephen Changed createTimeZone() to never return 0
30 * 09/02/98 stephen Added getOffset(monthLen) and hasSameRules()
31 * 09/15/98 stephen Added getStaticClassID()
32 * 02/22/99 stephen Removed character literals for EBCDIC safety
33 * 05/04/99 stephen Changed initDefault() for Mutex issues
34 * 07/12/99 helena HPUX 11 CC Port.
35 * 12/03/99 aliu Moved data out of static table into icudata.dll.
36 * Substantial rewrite of zone lookup, default zone, and
37 * available IDs code. Misc. cleanup.
38 *********************************************************************************/
39
40 #include "utypeinfo.h" // for 'typeid' to work
41
42 #include "unicode/utypes.h"
43 #include "unicode/ustring.h"
44 #include "uassert.h"
45 #include "ustr_imp.h"
46
47 #ifdef U_DEBUG_TZ
48 # include <stdio.h>
49 # include "uresimp.h" // for debugging
50
debug_tz_loc(const char * f,int32_t l)51 static void debug_tz_loc(const char *f, int32_t l)
52 {
53 fprintf(stderr, "%s:%d: ", f, l);
54 }
55
debug_tz_msg(const char * pat,...)56 static void debug_tz_msg(const char *pat, ...)
57 {
58 va_list ap;
59 va_start(ap, pat);
60 vfprintf(stderr, pat, ap);
61 fflush(stderr);
62 }
63 static char gStrBuf[256];
64 #define U_DEBUG_TZ_STR(x) u_austrncpy(gStrBuf,x,sizeof(gStrBuf)-1)
65 // must use double parens, i.e.: U_DEBUG_TZ_MSG(("four is: %d",4));
66 #define U_DEBUG_TZ_MSG(x) {debug_tz_loc(__FILE__,__LINE__);debug_tz_msg x;}
67 #else
68 #define U_DEBUG_TZ_MSG(x)
69 #endif
70
71 #if !UCONFIG_NO_FORMATTING
72
73 #include "unicode/simpletz.h"
74 #include "unicode/calendar.h"
75 #include "unicode/gregocal.h"
76 #include "unicode/ures.h"
77 #include "unicode/tzfmt.h"
78 #include "unicode/numfmt.h"
79 #include "gregoimp.h"
80 #include "uresimp.h" // struct UResourceBundle
81 #include "olsontz.h"
82 #include "mutex.h"
83 #include "unicode/udata.h"
84 #include "ucln_in.h"
85 #include "cstring.h"
86 #include "cmemory.h"
87 #include "unicode/strenum.h"
88 #include "uassert.h"
89 #include "zonemeta.h"
90
91 #define kZONEINFO "zoneinfo64"
92 #define kREGIONS "Regions"
93 #define kZONES "Zones"
94 #define kRULES "Rules"
95 #define kNAMES "Names"
96 #define kTZVERSION "TZVersion"
97 #define kLINKS "links"
98 #define kMAX_CUSTOM_HOUR 23
99 #define kMAX_CUSTOM_MIN 59
100 #define kMAX_CUSTOM_SEC 59
101 #define MINUS 0x002D
102 #define PLUS 0x002B
103 #define ZERO_DIGIT 0x0030
104 #define COLON 0x003A
105
106 // Static data and constants
107
108 static const UChar WORLD[] = {0x30, 0x30, 0x31, 0x00}; /* "001" */
109
110 static const UChar GMT_ID[] = {0x47, 0x4D, 0x54, 0x00}; /* "GMT" */
111 static const UChar UNKNOWN_ZONE_ID[] = {0x45, 0x74, 0x63, 0x2F, 0x55, 0x6E, 0x6B, 0x6E, 0x6F, 0x77, 0x6E, 0x00}; /* "Etc/Unknown" */
112 static const int32_t GMT_ID_LENGTH = 3;
113 static const int32_t UNKNOWN_ZONE_ID_LENGTH = 11;
114
115 static icu::TimeZone* DEFAULT_ZONE = NULL;
116 static icu::UInitOnce gDefaultZoneInitOnce = U_INITONCE_INITIALIZER;
117
118 alignas(icu::SimpleTimeZone)
119 static char gRawGMT[sizeof(icu::SimpleTimeZone)];
120
121 alignas(icu::SimpleTimeZone)
122 static char gRawUNKNOWN[sizeof(icu::SimpleTimeZone)];
123
124 static icu::UInitOnce gStaticZonesInitOnce = U_INITONCE_INITIALIZER;
125 static UBool gStaticZonesInitialized = FALSE; // Whether the static zones are initialized and ready to use.
126
127 static char TZDATA_VERSION[16];
128 static icu::UInitOnce gTZDataVersionInitOnce = U_INITONCE_INITIALIZER;
129
130 static int32_t* MAP_SYSTEM_ZONES = NULL;
131 static int32_t* MAP_CANONICAL_SYSTEM_ZONES = NULL;
132 static int32_t* MAP_CANONICAL_SYSTEM_LOCATION_ZONES = NULL;
133
134 static int32_t LEN_SYSTEM_ZONES = 0;
135 static int32_t LEN_CANONICAL_SYSTEM_ZONES = 0;
136 static int32_t LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
137
138 static icu::UInitOnce gSystemZonesInitOnce = U_INITONCE_INITIALIZER;
139 static icu::UInitOnce gCanonicalZonesInitOnce = U_INITONCE_INITIALIZER;
140 static icu::UInitOnce gCanonicalLocationZonesInitOnce = U_INITONCE_INITIALIZER;
141
142 U_CDECL_BEGIN
timeZone_cleanup(void)143 static UBool U_CALLCONV timeZone_cleanup(void)
144 {
145 U_NAMESPACE_USE
146 delete DEFAULT_ZONE;
147 DEFAULT_ZONE = NULL;
148 gDefaultZoneInitOnce.reset();
149
150 if (gStaticZonesInitialized) {
151 reinterpret_cast<SimpleTimeZone*>(gRawGMT)->~SimpleTimeZone();
152 reinterpret_cast<SimpleTimeZone*>(gRawUNKNOWN)->~SimpleTimeZone();
153 gStaticZonesInitialized = FALSE;
154 gStaticZonesInitOnce.reset();
155 }
156
157 uprv_memset(TZDATA_VERSION, 0, sizeof(TZDATA_VERSION));
158 gTZDataVersionInitOnce.reset();
159
160 LEN_SYSTEM_ZONES = 0;
161 uprv_free(MAP_SYSTEM_ZONES);
162 MAP_SYSTEM_ZONES = 0;
163 gSystemZonesInitOnce.reset();
164
165 LEN_CANONICAL_SYSTEM_ZONES = 0;
166 uprv_free(MAP_CANONICAL_SYSTEM_ZONES);
167 MAP_CANONICAL_SYSTEM_ZONES = 0;
168 gCanonicalZonesInitOnce.reset();
169
170 LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
171 uprv_free(MAP_CANONICAL_SYSTEM_LOCATION_ZONES);
172 MAP_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
173 gCanonicalLocationZonesInitOnce.reset();
174
175 return TRUE;
176 }
177 U_CDECL_END
178
179 U_NAMESPACE_BEGIN
180
findInStringArray(UResourceBundle * array,const UnicodeString & id,UErrorCode & status)181 static int32_t findInStringArray(UResourceBundle* array, const UnicodeString& id, UErrorCode &status)
182 {
183 UnicodeString copy;
184 const UChar *u;
185 int32_t len;
186
187 int32_t start = 0;
188 int32_t limit = ures_getSize(array);
189 int32_t mid;
190 int32_t lastMid = INT32_MAX;
191 if(U_FAILURE(status) || (limit < 1)) {
192 return -1;
193 }
194 U_DEBUG_TZ_MSG(("fisa: Looking for %s, between %d and %d\n", U_DEBUG_TZ_STR(UnicodeString(id).getTerminatedBuffer()), start, limit));
195
196 for (;;) {
197 mid = (int32_t)((start + limit) / 2);
198 if (lastMid == mid) { /* Have we moved? */
199 break; /* We haven't moved, and it wasn't found. */
200 }
201 lastMid = mid;
202 u = ures_getStringByIndex(array, mid, &len, &status);
203 if (U_FAILURE(status)) {
204 break;
205 }
206 U_DEBUG_TZ_MSG(("tz: compare to %s, %d .. [%d] .. %d\n", U_DEBUG_TZ_STR(u), start, mid, limit));
207 copy.setTo(TRUE, u, len);
208 int r = id.compare(copy);
209 if(r==0) {
210 U_DEBUG_TZ_MSG(("fisa: found at %d\n", mid));
211 return mid;
212 } else if(r<0) {
213 limit = mid;
214 } else {
215 start = mid;
216 }
217 }
218 U_DEBUG_TZ_MSG(("fisa: not found\n"));
219 return -1;
220 }
221
222 /**
223 * Fetch a specific zone by name. Replaces the getByKey call.
224 * @param top Top timezone resource
225 * @param id Time zone ID
226 * @param oldbundle Bundle for reuse (or NULL). see 'ures_open()'
227 * @return the zone's bundle if found, or undefined if error. Reuses oldbundle.
228 */
getZoneByName(const UResourceBundle * top,const UnicodeString & id,UResourceBundle * oldbundle,UErrorCode & status)229 static UResourceBundle* getZoneByName(const UResourceBundle* top, const UnicodeString& id, UResourceBundle *oldbundle, UErrorCode& status) {
230 // load the Rules object
231 UResourceBundle *tmp = ures_getByKey(top, kNAMES, NULL, &status);
232
233 // search for the string
234 int32_t idx = findInStringArray(tmp, id, status);
235
236 if((idx == -1) && U_SUCCESS(status)) {
237 // not found
238 status = U_MISSING_RESOURCE_ERROR;
239 //ures_close(oldbundle);
240 //oldbundle = NULL;
241 } else {
242 U_DEBUG_TZ_MSG(("gzbn: oldbundle= size %d, type %d, %s\n", ures_getSize(tmp), ures_getType(tmp), u_errorName(status)));
243 tmp = ures_getByKey(top, kZONES, tmp, &status); // get Zones object from top
244 U_DEBUG_TZ_MSG(("gzbn: loaded ZONES, size %d, type %d, path %s %s\n", ures_getSize(tmp), ures_getType(tmp), ures_getPath(tmp), u_errorName(status)));
245 oldbundle = ures_getByIndex(tmp, idx, oldbundle, &status); // get nth Zone object
246 U_DEBUG_TZ_MSG(("gzbn: loaded z#%d, size %d, type %d, path %s, %s\n", idx, ures_getSize(oldbundle), ures_getType(oldbundle), ures_getPath(oldbundle), u_errorName(status)));
247 }
248 ures_close(tmp);
249 if(U_FAILURE(status)) {
250 //ures_close(oldbundle);
251 return NULL;
252 } else {
253 return oldbundle;
254 }
255 }
256
257
loadRule(const UResourceBundle * top,const UnicodeString & ruleid,UResourceBundle * oldbundle,UErrorCode & status)258 UResourceBundle* TimeZone::loadRule(const UResourceBundle* top, const UnicodeString& ruleid, UResourceBundle* oldbundle, UErrorCode& status) {
259 char key[64];
260 ruleid.extract(0, sizeof(key)-1, key, (int32_t)sizeof(key)-1, US_INV);
261 U_DEBUG_TZ_MSG(("loadRule(%s)\n", key));
262 UResourceBundle *r = ures_getByKey(top, kRULES, oldbundle, &status);
263 U_DEBUG_TZ_MSG(("loadRule(%s) -> kRULES [%s]\n", key, u_errorName(status)));
264 r = ures_getByKey(r, key, r, &status);
265 U_DEBUG_TZ_MSG(("loadRule(%s) -> item [%s]\n", key, u_errorName(status)));
266 return r;
267 }
268
269 /**
270 * Given an ID, open the appropriate resource for the given time zone.
271 * Dereference aliases if necessary.
272 * @param id zone id
273 * @param res resource, which must be ready for use (initialized but not open)
274 * @param ec input-output error code
275 * @return top-level resource bundle
276 */
openOlsonResource(const UnicodeString & id,UResourceBundle & res,UErrorCode & ec)277 static UResourceBundle* openOlsonResource(const UnicodeString& id,
278 UResourceBundle& res,
279 UErrorCode& ec)
280 {
281 #ifdef U_DEBUG_TZ
282 char buf[128];
283 id.extract(0, sizeof(buf)-1, buf, sizeof(buf), "");
284 #endif
285 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
286 U_DEBUG_TZ_MSG(("pre: res sz=%d\n", ures_getSize(&res)));
287 /* &res = */ getZoneByName(top, id, &res, ec);
288 // Dereference if this is an alias. Docs say result should be 1
289 // but it is 0 in 2.8 (?).
290 U_DEBUG_TZ_MSG(("Loading zone '%s' (%s, size %d) - %s\n", buf, ures_getKey((UResourceBundle*)&res), ures_getSize(&res), u_errorName(ec)));
291 if (ures_getType(&res) == URES_INT) {
292 int32_t deref = ures_getInt(&res, &ec) + 0;
293 U_DEBUG_TZ_MSG(("getInt: %s - type is %d\n", u_errorName(ec), ures_getType(&res)));
294 UResourceBundle *ares = ures_getByKey(top, kZONES, NULL, &ec); // dereference Zones section
295 ures_getByIndex(ares, deref, &res, &ec);
296 ures_close(ares);
297 U_DEBUG_TZ_MSG(("alias to #%d (%s) - %s\n", deref, "??", u_errorName(ec)));
298 } else {
299 U_DEBUG_TZ_MSG(("not an alias - size %d\n", ures_getSize(&res)));
300 }
301 U_DEBUG_TZ_MSG(("%s - final status is %s\n", buf, u_errorName(ec)));
302 return top;
303 }
304
305 // -------------------------------------
306
307 namespace {
308
initStaticTimeZones()309 void U_CALLCONV initStaticTimeZones() {
310 // Initialize _GMT independently of other static data; it should
311 // be valid even if we can't load the time zone UDataMemory.
312 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
313
314 // new can't fail below, as we use placement new into staticly allocated space.
315 new(gRawGMT) SimpleTimeZone(0, UnicodeString(TRUE, GMT_ID, GMT_ID_LENGTH));
316 new(gRawUNKNOWN) SimpleTimeZone(0, UnicodeString(TRUE, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH));
317
318 gStaticZonesInitialized = TRUE;
319 }
320
321 } // anonymous namespace
322
323 const TimeZone& U_EXPORT2
getUnknown()324 TimeZone::getUnknown()
325 {
326 umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
327 return *reinterpret_cast<SimpleTimeZone*>(gRawUNKNOWN);
328 }
329
330 const TimeZone* U_EXPORT2
getGMT(void)331 TimeZone::getGMT(void)
332 {
333 umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
334 return reinterpret_cast<SimpleTimeZone*>(gRawGMT);
335 }
336
337 // *****************************************************************************
338 // class TimeZone
339 // *****************************************************************************
340
UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)341 UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)
342
343 TimeZone::TimeZone()
344 : UObject(), fID()
345 {
346 }
347
348 // -------------------------------------
349
TimeZone(const UnicodeString & id)350 TimeZone::TimeZone(const UnicodeString &id)
351 : UObject(), fID(id)
352 {
353 }
354
355 // -------------------------------------
356
~TimeZone()357 TimeZone::~TimeZone()
358 {
359 }
360
361 // -------------------------------------
362
TimeZone(const TimeZone & source)363 TimeZone::TimeZone(const TimeZone &source)
364 : UObject(source), fID(source.fID)
365 {
366 }
367
368 // -------------------------------------
369
370 TimeZone &
operator =(const TimeZone & right)371 TimeZone::operator=(const TimeZone &right)
372 {
373 if (this != &right) fID = right.fID;
374 return *this;
375 }
376
377 // -------------------------------------
378
379 UBool
operator ==(const TimeZone & that) const380 TimeZone::operator==(const TimeZone& that) const
381 {
382 return typeid(*this) == typeid(that) &&
383 fID == that.fID;
384 }
385
386 // -------------------------------------
387
388 namespace {
389 TimeZone*
createSystemTimeZone(const UnicodeString & id,UErrorCode & ec)390 createSystemTimeZone(const UnicodeString& id, UErrorCode& ec) {
391 if (U_FAILURE(ec)) {
392 return NULL;
393 }
394 TimeZone* z = 0;
395 StackUResourceBundle res;
396 U_DEBUG_TZ_MSG(("pre-err=%s\n", u_errorName(ec)));
397 UResourceBundle *top = openOlsonResource(id, res.ref(), ec);
398 U_DEBUG_TZ_MSG(("post-err=%s\n", u_errorName(ec)));
399 if (U_SUCCESS(ec)) {
400 z = new OlsonTimeZone(top, res.getAlias(), id, ec);
401 if (z == NULL) {
402 ec = U_MEMORY_ALLOCATION_ERROR;
403 U_DEBUG_TZ_MSG(("cstz: olson time zone failed to initialize - err %s\n", u_errorName(ec)));
404 }
405 }
406 ures_close(top);
407 if (U_FAILURE(ec)) {
408 U_DEBUG_TZ_MSG(("cstz: failed to create, err %s\n", u_errorName(ec)));
409 delete z;
410 z = NULL;
411 }
412 return z;
413 }
414
415 /**
416 * Lookup the given name in our system zone table. If found,
417 * instantiate a new zone of that name and return it. If not
418 * found, return 0.
419 */
420 TimeZone*
createSystemTimeZone(const UnicodeString & id)421 createSystemTimeZone(const UnicodeString& id) {
422 UErrorCode ec = U_ZERO_ERROR;
423 return createSystemTimeZone(id, ec);
424 }
425
426 }
427
428 TimeZone* U_EXPORT2
createTimeZone(const UnicodeString & ID)429 TimeZone::createTimeZone(const UnicodeString& ID)
430 {
431 /* We first try to lookup the zone ID in our system list. If this
432 * fails, we try to parse it as a custom string GMT[+-]hh:mm. If
433 * all else fails, we return GMT, which is probably not what the
434 * user wants, but at least is a functioning TimeZone object.
435 *
436 * We cannot return NULL, because that would break compatibility
437 * with the JDK.
438 */
439 TimeZone* result = createSystemTimeZone(ID);
440
441 if (result == NULL) {
442 U_DEBUG_TZ_MSG(("failed to load system time zone with id - falling to custom"));
443 result = createCustomTimeZone(ID);
444 }
445 if (result == NULL) {
446 U_DEBUG_TZ_MSG(("failed to load time zone with id - falling to Etc/Unknown(GMT)"));
447 const TimeZone& unknown = getUnknown();
448 // Unknown zone uses staticly allocated memory, so creation of it can never fail due to OOM.
449 result = unknown.clone();
450 }
451 return result;
452 }
453
454 // -------------------------------------
455
456 TimeZone* U_EXPORT2
detectHostTimeZone()457 TimeZone::detectHostTimeZone()
458 {
459 // We access system timezone data through uprv_tzset(), uprv_tzname(), and others,
460 // which have platform specific implementations in putil.cpp
461 int32_t rawOffset = 0;
462 const char *hostID;
463 UBool hostDetectionSucceeded = TRUE;
464
465 // First, try to create a system timezone, based
466 // on the string ID in tzname[0].
467
468 uprv_tzset(); // Initialize tz... system data
469
470 uprv_tzname_clear_cache();
471
472 // Get the timezone ID from the host. This function should do
473 // any required host-specific remapping; e.g., on Windows this
474 // function maps the Windows Time Zone name to an ICU timezone ID.
475 hostID = uprv_tzname(0);
476
477 // Invert sign because UNIX semantics are backwards
478 rawOffset = uprv_timezone() * -U_MILLIS_PER_SECOND;
479
480 TimeZone* hostZone = NULL;
481
482 UnicodeString hostStrID(hostID, -1, US_INV);
483
484 if (hostStrID.length() == 0) {
485 // The host time zone detection (or remapping) above has failed and
486 // we have no name at all. Fallback to using the Unknown zone.
487 hostStrID = UnicodeString(TRUE, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH);
488 hostDetectionSucceeded = FALSE;
489 }
490
491 hostZone = createSystemTimeZone(hostStrID);
492
493 #if U_PLATFORM_USES_ONLY_WIN32_API
494 // hostID points to a heap-allocated location on Windows.
495 uprv_free(const_cast<char *>(hostID));
496 #endif
497
498 int32_t hostIDLen = hostStrID.length();
499 if (hostZone != NULL && rawOffset != hostZone->getRawOffset()
500 && (3 <= hostIDLen && hostIDLen <= 4))
501 {
502 // Uh oh. This probably wasn't a good id.
503 // It was probably an ambiguous abbreviation
504 delete hostZone;
505 hostZone = NULL;
506 }
507
508 // Construct a fixed standard zone with the host's ID
509 // and raw offset.
510 if (hostZone == NULL && hostDetectionSucceeded) {
511 hostZone = new SimpleTimeZone(rawOffset, hostStrID);
512 }
513
514 // If we _still_ don't have a time zone, use the Unknown zone.
515 //
516 // Note: This is extremely unlikely situation. If
517 // new SimpleTimeZone(...) above fails, the following
518 // code may also fail.
519 if (hostZone == NULL) {
520 // Unknown zone uses static allocated memory, so it must always exist.
521 // However, clone() allocates memory and can fail.
522 hostZone = TimeZone::getUnknown().clone();
523 }
524
525 return hostZone;
526 }
527
528 // -------------------------------------
529
530 static UMutex gDefaultZoneMutex;
531
532 /**
533 * Initialize DEFAULT_ZONE from the system default time zone.
534 * Upon return, DEFAULT_ZONE will not be NULL, unless operator new()
535 * returns NULL.
536 */
initDefault()537 static void U_CALLCONV initDefault()
538 {
539 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
540
541 Mutex lock(&gDefaultZoneMutex);
542 // If setDefault() has already been called we can skip getting the
543 // default zone information from the system.
544 if (DEFAULT_ZONE != NULL) {
545 return;
546 }
547
548 // NOTE: this code is safely single threaded, being only
549 // run via umtx_initOnce().
550 //
551 // Some of the locale/timezone OS functions may not be thread safe,
552 //
553 // The operating system might actually use ICU to implement timezones.
554 // So we may have ICU calling ICU here, like on AIX.
555 // There shouldn't be a problem with this; initOnce does not hold a mutex
556 // while the init function is being run.
557
558 // The code detecting the host time zone was separated from this
559 // and implemented as TimeZone::detectHostTimeZone()
560
561 TimeZone *default_zone = TimeZone::detectHostTimeZone();
562
563 U_ASSERT(DEFAULT_ZONE == NULL);
564
565 DEFAULT_ZONE = default_zone;
566 }
567
568 // -------------------------------------
569
570 TimeZone* U_EXPORT2
createDefault()571 TimeZone::createDefault()
572 {
573 umtx_initOnce(gDefaultZoneInitOnce, initDefault);
574 {
575 Mutex lock(&gDefaultZoneMutex);
576 return (DEFAULT_ZONE != NULL) ? DEFAULT_ZONE->clone() : NULL;
577 }
578 }
579
580 // -------------------------------------
581
582 TimeZone* U_EXPORT2
forLocaleOrDefault(const Locale & locale)583 TimeZone::forLocaleOrDefault(const Locale& locale)
584 {
585 char buffer[ULOC_KEYWORDS_CAPACITY] = "";
586 UErrorCode localStatus = U_ZERO_ERROR;
587 int32_t count = locale.getKeywordValue("timezone", buffer, sizeof(buffer), localStatus);
588 if (U_FAILURE(localStatus) || localStatus == U_STRING_NOT_TERMINATED_WARNING) {
589 // the "timezone" keyword exceeds ULOC_KEYWORDS_CAPACITY; ignore and use default.
590 count = 0;
591 }
592 if (count > 0) {
593 return TimeZone::createTimeZone(UnicodeString(buffer, count, US_INV));
594 }
595 return TimeZone::createDefault();
596 }
597
598 // -------------------------------------
599
600 void U_EXPORT2
adoptDefault(TimeZone * zone)601 TimeZone::adoptDefault(TimeZone* zone)
602 {
603 if (zone != NULL)
604 {
605 {
606 Mutex lock(&gDefaultZoneMutex);
607 TimeZone *old = DEFAULT_ZONE;
608 DEFAULT_ZONE = zone;
609 delete old;
610 }
611 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
612 }
613 }
614 // -------------------------------------
615
616 void U_EXPORT2
setDefault(const TimeZone & zone)617 TimeZone::setDefault(const TimeZone& zone)
618 {
619 adoptDefault(zone.clone());
620 }
621
622 //----------------------------------------------------------------------
623
624
initMap(USystemTimeZoneType type,UErrorCode & ec)625 static void U_CALLCONV initMap(USystemTimeZoneType type, UErrorCode& ec) {
626 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
627
628 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
629 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
630 if (U_SUCCESS(ec)) {
631 int32_t size = ures_getSize(res);
632 int32_t *m = (int32_t *)uprv_malloc(size * sizeof(int32_t));
633 if (m == NULL) {
634 ec = U_MEMORY_ALLOCATION_ERROR;
635 } else {
636 int32_t numEntries = 0;
637 for (int32_t i = 0; i < size; i++) {
638 UnicodeString id = ures_getUnicodeStringByIndex(res, i, &ec);
639 if (U_FAILURE(ec)) {
640 break;
641 }
642 if (0 == id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH)) {
643 // exclude Etc/Unknown
644 continue;
645 }
646 if (type == UCAL_ZONE_TYPE_CANONICAL || type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
647 UnicodeString canonicalID;
648 ZoneMeta::getCanonicalCLDRID(id, canonicalID, ec);
649 if (U_FAILURE(ec)) {
650 break;
651 }
652 if (canonicalID != id) {
653 // exclude aliases
654 continue;
655 }
656 }
657 if (type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
658 const UChar *region = TimeZone::getRegion(id, ec);
659 if (U_FAILURE(ec)) {
660 break;
661 }
662 if (u_strcmp(region, WORLD) == 0) {
663 // exclude non-location ("001")
664 continue;
665 }
666 }
667 m[numEntries++] = i;
668 }
669 if (U_SUCCESS(ec)) {
670 int32_t *tmp = m;
671 m = (int32_t *)uprv_realloc(tmp, numEntries * sizeof(int32_t));
672 if (m == NULL) {
673 // realloc failed.. use the original one even it has unused
674 // area at the end
675 m = tmp;
676 }
677
678 switch(type) {
679 case UCAL_ZONE_TYPE_ANY:
680 U_ASSERT(MAP_SYSTEM_ZONES == NULL);
681 MAP_SYSTEM_ZONES = m;
682 LEN_SYSTEM_ZONES = numEntries;
683 break;
684 case UCAL_ZONE_TYPE_CANONICAL:
685 U_ASSERT(MAP_CANONICAL_SYSTEM_ZONES == NULL);
686 MAP_CANONICAL_SYSTEM_ZONES = m;
687 LEN_CANONICAL_SYSTEM_ZONES = numEntries;
688 break;
689 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
690 U_ASSERT(MAP_CANONICAL_SYSTEM_LOCATION_ZONES == NULL);
691 MAP_CANONICAL_SYSTEM_LOCATION_ZONES = m;
692 LEN_CANONICAL_SYSTEM_LOCATION_ZONES = numEntries;
693 break;
694 }
695 }
696 }
697 }
698 ures_close(res);
699 }
700
701
702 /**
703 * This is the default implementation for subclasses that do not
704 * override this method. This implementation calls through to the
705 * 8-argument getOffset() method after suitable computations, and
706 * correctly adjusts GMT millis to local millis when necessary.
707 */
getOffset(UDate date,UBool local,int32_t & rawOffset,int32_t & dstOffset,UErrorCode & ec) const708 void TimeZone::getOffset(UDate date, UBool local, int32_t& rawOffset,
709 int32_t& dstOffset, UErrorCode& ec) const {
710 if (U_FAILURE(ec)) {
711 return;
712 }
713
714 rawOffset = getRawOffset();
715 if (!local) {
716 date += rawOffset; // now in local standard millis
717 }
718
719 // When local == TRUE, date might not be in local standard
720 // millis. getOffset taking 7 parameters used here assume
721 // the given time in day is local standard time.
722 // At STD->DST transition, there is a range of time which
723 // does not exist. When 'date' is in this time range
724 // (and local == TRUE), this method interprets the specified
725 // local time as DST. At DST->STD transition, there is a
726 // range of time which occurs twice. In this case, this
727 // method interprets the specified local time as STD.
728 // To support the behavior above, we need to call getOffset
729 // (with 7 args) twice when local == true and DST is
730 // detected in the initial call.
731 for (int32_t pass=0; ; ++pass) {
732 int32_t year, month, dom, dow;
733 double day = uprv_floor(date / U_MILLIS_PER_DAY);
734 int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
735
736 Grego::dayToFields(day, year, month, dom, dow);
737
738 dstOffset = getOffset(GregorianCalendar::AD, year, month, dom,
739 (uint8_t) dow, millis,
740 Grego::monthLength(year, month),
741 ec) - rawOffset;
742
743 // Recompute if local==TRUE, dstOffset!=0.
744 if (pass!=0 || !local || dstOffset == 0) {
745 break;
746 }
747 // adjust to local standard millis
748 date -= dstOffset;
749 }
750 }
751
752 // -------------------------------------
753
754 // New available IDs API as of ICU 2.4. Uses StringEnumeration API.
755
756 class TZEnumeration : public StringEnumeration {
757 private:
758
759 // Map into to zones. Our results are zone[map[i]] for
760 // i=0..len-1, where zone[i] is the i-th Olson zone. If map==NULL
761 // then our results are zone[i] for i=0..len-1. Len will be zero
762 // if the zone data could not be loaded.
763 int32_t* map;
764 int32_t* localMap;
765 int32_t len;
766 int32_t pos;
767
TZEnumeration(int32_t * mapData,int32_t mapLen,UBool adoptMapData)768 TZEnumeration(int32_t* mapData, int32_t mapLen, UBool adoptMapData) : pos(0) {
769 map = mapData;
770 localMap = adoptMapData ? mapData : NULL;
771 len = mapLen;
772 }
773
getID(int32_t i,UErrorCode & ec)774 UBool getID(int32_t i, UErrorCode& ec) {
775 int32_t idLen = 0;
776 const UChar* id = NULL;
777 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
778 top = ures_getByKey(top, kNAMES, top, &ec); // dereference Zones section
779 id = ures_getStringByIndex(top, i, &idLen, &ec);
780 if(U_FAILURE(ec)) {
781 unistr.truncate(0);
782 }
783 else {
784 unistr.fastCopyFrom(UnicodeString(TRUE, id, idLen));
785 }
786 ures_close(top);
787 return U_SUCCESS(ec);
788 }
789
getMap(USystemTimeZoneType type,int32_t & len,UErrorCode & ec)790 static int32_t* getMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) {
791 len = 0;
792 if (U_FAILURE(ec)) {
793 return NULL;
794 }
795 int32_t* m = NULL;
796 switch (type) {
797 case UCAL_ZONE_TYPE_ANY:
798 umtx_initOnce(gSystemZonesInitOnce, &initMap, type, ec);
799 m = MAP_SYSTEM_ZONES;
800 len = LEN_SYSTEM_ZONES;
801 break;
802 case UCAL_ZONE_TYPE_CANONICAL:
803 umtx_initOnce(gCanonicalZonesInitOnce, &initMap, type, ec);
804 m = MAP_CANONICAL_SYSTEM_ZONES;
805 len = LEN_CANONICAL_SYSTEM_ZONES;
806 break;
807 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
808 umtx_initOnce(gCanonicalLocationZonesInitOnce, &initMap, type, ec);
809 m = MAP_CANONICAL_SYSTEM_LOCATION_ZONES;
810 len = LEN_CANONICAL_SYSTEM_LOCATION_ZONES;
811 break;
812 default:
813 ec = U_ILLEGAL_ARGUMENT_ERROR;
814 m = NULL;
815 len = 0;
816 break;
817 }
818 return m;
819 }
820
821 public:
822
823 #define DEFAULT_FILTERED_MAP_SIZE 8
824 #define MAP_INCREMENT_SIZE 8
825
create(USystemTimeZoneType type,const char * region,const int32_t * rawOffset,UErrorCode & ec)826 static TZEnumeration* create(USystemTimeZoneType type, const char* region, const int32_t* rawOffset, UErrorCode& ec) {
827 if (U_FAILURE(ec)) {
828 return NULL;
829 }
830
831 int32_t baseLen;
832 int32_t *baseMap = getMap(type, baseLen, ec);
833
834 if (U_FAILURE(ec)) {
835 return NULL;
836 }
837
838 // If any additional conditions are available,
839 // create instance local map filtered by the conditions.
840
841 int32_t *filteredMap = NULL;
842 int32_t numEntries = 0;
843
844 if (region != NULL || rawOffset != NULL) {
845 int32_t filteredMapSize = DEFAULT_FILTERED_MAP_SIZE;
846 filteredMap = (int32_t *)uprv_malloc(filteredMapSize * sizeof(int32_t));
847 if (filteredMap == NULL) {
848 ec = U_MEMORY_ALLOCATION_ERROR;
849 return NULL;
850 }
851
852 // Walk through the base map
853 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
854 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
855 for (int32_t i = 0; i < baseLen; i++) {
856 int32_t zidx = baseMap[i];
857 UnicodeString id = ures_getUnicodeStringByIndex(res, zidx, &ec);
858 if (U_FAILURE(ec)) {
859 break;
860 }
861 if (region != NULL) {
862 // Filter by region
863 char tzregion[4]; // max 3 letters + null term
864 TimeZone::getRegion(id, tzregion, sizeof(tzregion), ec);
865 if (U_FAILURE(ec)) {
866 break;
867 }
868 if (uprv_stricmp(tzregion, region) != 0) {
869 // region does not match
870 continue;
871 }
872 }
873 if (rawOffset != NULL) {
874 // Filter by raw offset
875 // Note: This is VERY inefficient
876 TimeZone *z = createSystemTimeZone(id, ec);
877 if (U_FAILURE(ec)) {
878 break;
879 }
880 int32_t tzoffset = z->getRawOffset();
881 delete z;
882
883 if (tzoffset != *rawOffset) {
884 continue;
885 }
886 }
887
888 if (filteredMapSize <= numEntries) {
889 filteredMapSize += MAP_INCREMENT_SIZE;
890 int32_t *tmp = (int32_t *)uprv_realloc(filteredMap, filteredMapSize * sizeof(int32_t));
891 if (tmp == NULL) {
892 ec = U_MEMORY_ALLOCATION_ERROR;
893 break;
894 } else {
895 filteredMap = tmp;
896 }
897 }
898
899 filteredMap[numEntries++] = zidx;
900 }
901
902 if (U_FAILURE(ec)) {
903 uprv_free(filteredMap);
904 filteredMap = NULL;
905 }
906
907 ures_close(res);
908 }
909
910 TZEnumeration *result = NULL;
911 if (U_SUCCESS(ec)) {
912 // Finally, create a new enumeration instance
913 if (filteredMap == NULL) {
914 result = new TZEnumeration(baseMap, baseLen, FALSE);
915 } else {
916 result = new TZEnumeration(filteredMap, numEntries, TRUE);
917 filteredMap = NULL;
918 }
919 if (result == NULL) {
920 ec = U_MEMORY_ALLOCATION_ERROR;
921 }
922 }
923
924 if (filteredMap != NULL) {
925 uprv_free(filteredMap);
926 }
927
928 return result;
929 }
930
TZEnumeration(const TZEnumeration & other)931 TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(NULL), localMap(NULL), len(0), pos(0) {
932 if (other.localMap != NULL) {
933 localMap = (int32_t *)uprv_malloc(other.len * sizeof(int32_t));
934 if (localMap != NULL) {
935 len = other.len;
936 uprv_memcpy(localMap, other.localMap, len * sizeof(int32_t));
937 pos = other.pos;
938 map = localMap;
939 } else {
940 len = 0;
941 pos = 0;
942 map = NULL;
943 }
944 } else {
945 map = other.map;
946 localMap = NULL;
947 len = other.len;
948 pos = other.pos;
949 }
950 }
951
952 virtual ~TZEnumeration();
953
clone() const954 virtual StringEnumeration *clone() const {
955 return new TZEnumeration(*this);
956 }
957
count(UErrorCode & status) const958 virtual int32_t count(UErrorCode& status) const {
959 return U_FAILURE(status) ? 0 : len;
960 }
961
snext(UErrorCode & status)962 virtual const UnicodeString* snext(UErrorCode& status) {
963 if (U_SUCCESS(status) && map != NULL && pos < len) {
964 getID(map[pos], status);
965 ++pos;
966 return &unistr;
967 }
968 return 0;
969 }
970
reset(UErrorCode &)971 virtual void reset(UErrorCode& /*status*/) {
972 pos = 0;
973 }
974
975 public:
976 static UClassID U_EXPORT2 getStaticClassID(void);
977 virtual UClassID getDynamicClassID(void) const;
978 };
979
~TZEnumeration()980 TZEnumeration::~TZEnumeration() {
981 if (localMap != NULL) {
982 uprv_free(localMap);
983 }
984 }
985
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)986 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)
987
988 StringEnumeration* U_EXPORT2
989 TimeZone::createTimeZoneIDEnumeration(
990 USystemTimeZoneType zoneType,
991 const char* region,
992 const int32_t* rawOffset,
993 UErrorCode& ec) {
994 return TZEnumeration::create(zoneType, region, rawOffset, ec);
995 }
996
997 StringEnumeration* U_EXPORT2
createEnumeration()998 TimeZone::createEnumeration() {
999 UErrorCode ec = U_ZERO_ERROR;
1000 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, NULL, ec);
1001 }
1002
1003 StringEnumeration* U_EXPORT2
createEnumeration(int32_t rawOffset)1004 TimeZone::createEnumeration(int32_t rawOffset) {
1005 UErrorCode ec = U_ZERO_ERROR;
1006 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, &rawOffset, ec);
1007 }
1008
1009 StringEnumeration* U_EXPORT2
createEnumeration(const char * country)1010 TimeZone::createEnumeration(const char* country) {
1011 UErrorCode ec = U_ZERO_ERROR;
1012 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, country, NULL, ec);
1013 }
1014
1015 // ---------------------------------------
1016
1017 int32_t U_EXPORT2
countEquivalentIDs(const UnicodeString & id)1018 TimeZone::countEquivalentIDs(const UnicodeString& id) {
1019 int32_t result = 0;
1020 UErrorCode ec = U_ZERO_ERROR;
1021 StackUResourceBundle res;
1022 U_DEBUG_TZ_MSG(("countEquivalentIDs..\n"));
1023 UResourceBundle *top = openOlsonResource(id, res.ref(), ec);
1024 if (U_SUCCESS(ec)) {
1025 StackUResourceBundle r;
1026 ures_getByKey(res.getAlias(), kLINKS, r.getAlias(), &ec);
1027 ures_getIntVector(r.getAlias(), &result, &ec);
1028 }
1029 ures_close(top);
1030 return result;
1031 }
1032
1033 // ---------------------------------------
1034
1035 const UnicodeString U_EXPORT2
getEquivalentID(const UnicodeString & id,int32_t index)1036 TimeZone::getEquivalentID(const UnicodeString& id, int32_t index) {
1037 U_DEBUG_TZ_MSG(("gEI(%d)\n", index));
1038 UnicodeString result;
1039 UErrorCode ec = U_ZERO_ERROR;
1040 StackUResourceBundle res;
1041 UResourceBundle *top = openOlsonResource(id, res.ref(), ec);
1042 int32_t zone = -1;
1043 if (U_SUCCESS(ec)) {
1044 StackUResourceBundle r;
1045 int32_t size;
1046 ures_getByKey(res.getAlias(), kLINKS, r.getAlias(), &ec);
1047 const int32_t *v = ures_getIntVector(r.getAlias(), &size, &ec);
1048 if (U_SUCCESS(ec)) {
1049 if (index >= 0 && index < size) {
1050 zone = v[index];
1051 }
1052 }
1053 }
1054 if (zone >= 0) {
1055 UResourceBundle *ares = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Zones section
1056 if (U_SUCCESS(ec)) {
1057 int32_t idLen = 0;
1058 const UChar* id2 = ures_getStringByIndex(ares, zone, &idLen, &ec);
1059 result.fastCopyFrom(UnicodeString(TRUE, id2, idLen));
1060 U_DEBUG_TZ_MSG(("gei(%d) -> %d, len%d, %s\n", index, zone, result.length(), u_errorName(ec)));
1061 }
1062 ures_close(ares);
1063 }
1064 ures_close(top);
1065 #if defined(U_DEBUG_TZ)
1066 if(result.length() ==0) {
1067 U_DEBUG_TZ_MSG(("equiv [__, #%d] -> 0 (%s)\n", index, u_errorName(ec)));
1068 }
1069 #endif
1070 return result;
1071 }
1072
1073 // ---------------------------------------
1074
1075 // These methods are used by ZoneMeta class only.
1076
1077 const UChar*
findID(const UnicodeString & id)1078 TimeZone::findID(const UnicodeString& id) {
1079 const UChar *result = NULL;
1080 UErrorCode ec = U_ZERO_ERROR;
1081 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1082
1083 // resolve zone index by name
1084 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1085 int32_t idx = findInStringArray(names, id, ec);
1086 result = ures_getStringByIndex(names, idx, NULL, &ec);
1087 if (U_FAILURE(ec)) {
1088 result = NULL;
1089 }
1090 ures_close(names);
1091 ures_close(rb);
1092 return result;
1093 }
1094
1095
1096 const UChar*
dereferOlsonLink(const UnicodeString & id)1097 TimeZone::dereferOlsonLink(const UnicodeString& id) {
1098 const UChar *result = NULL;
1099 UErrorCode ec = U_ZERO_ERROR;
1100 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1101
1102 // resolve zone index by name
1103 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1104 int32_t idx = findInStringArray(names, id, ec);
1105 result = ures_getStringByIndex(names, idx, NULL, &ec);
1106
1107 // open the zone bundle by index
1108 ures_getByKey(rb, kZONES, rb, &ec);
1109 ures_getByIndex(rb, idx, rb, &ec);
1110
1111 if (U_SUCCESS(ec)) {
1112 if (ures_getType(rb) == URES_INT) {
1113 // this is a link - dereference the link
1114 int32_t deref = ures_getInt(rb, &ec);
1115 const UChar* tmp = ures_getStringByIndex(names, deref, NULL, &ec);
1116 if (U_SUCCESS(ec)) {
1117 result = tmp;
1118 }
1119 }
1120 }
1121
1122 ures_close(names);
1123 ures_close(rb);
1124
1125 return result;
1126 }
1127
1128 const UChar*
getRegion(const UnicodeString & id)1129 TimeZone::getRegion(const UnicodeString& id) {
1130 UErrorCode status = U_ZERO_ERROR;
1131 return getRegion(id, status);
1132 }
1133
1134 const UChar*
getRegion(const UnicodeString & id,UErrorCode & status)1135 TimeZone::getRegion(const UnicodeString& id, UErrorCode& status) {
1136 if (U_FAILURE(status)) {
1137 return NULL;
1138 }
1139 const UChar *result = NULL;
1140 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &status);
1141
1142 // resolve zone index by name
1143 UResourceBundle *res = ures_getByKey(rb, kNAMES, NULL, &status);
1144 int32_t idx = findInStringArray(res, id, status);
1145
1146 // get region mapping
1147 ures_getByKey(rb, kREGIONS, res, &status);
1148 const UChar *tmp = ures_getStringByIndex(res, idx, NULL, &status);
1149 if (U_SUCCESS(status)) {
1150 result = tmp;
1151 }
1152
1153 ures_close(res);
1154 ures_close(rb);
1155
1156 return result;
1157 }
1158
1159
1160 // ---------------------------------------
1161 int32_t
getRegion(const UnicodeString & id,char * region,int32_t capacity,UErrorCode & status)1162 TimeZone::getRegion(const UnicodeString& id, char *region, int32_t capacity, UErrorCode& status)
1163 {
1164 int32_t resultLen = 0;
1165 *region = 0;
1166 if (U_FAILURE(status)) {
1167 return 0;
1168 }
1169
1170 const UChar *uregion = NULL;
1171 // "Etc/Unknown" is not a system zone ID,
1172 // but in the zone data
1173 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) != 0) {
1174 uregion = getRegion(id);
1175 }
1176 if (uregion == NULL) {
1177 status = U_ILLEGAL_ARGUMENT_ERROR;
1178 return 0;
1179 }
1180 resultLen = u_strlen(uregion);
1181 // A region code is represented by invariant characters
1182 u_UCharsToChars(uregion, region, uprv_min(resultLen, capacity));
1183
1184 if (capacity < resultLen) {
1185 status = U_BUFFER_OVERFLOW_ERROR;
1186 return resultLen;
1187 }
1188
1189 return u_terminateChars(region, capacity, resultLen, &status);
1190 }
1191
1192 // ---------------------------------------
1193
1194
1195 UnicodeString&
getDisplayName(UnicodeString & result) const1196 TimeZone::getDisplayName(UnicodeString& result) const
1197 {
1198 return getDisplayName(FALSE,LONG,Locale::getDefault(), result);
1199 }
1200
1201 UnicodeString&
getDisplayName(const Locale & locale,UnicodeString & result) const1202 TimeZone::getDisplayName(const Locale& locale, UnicodeString& result) const
1203 {
1204 return getDisplayName(FALSE, LONG, locale, result);
1205 }
1206
1207 UnicodeString&
getDisplayName(UBool inDaylight,EDisplayType style,UnicodeString & result) const1208 TimeZone::getDisplayName(UBool inDaylight, EDisplayType style, UnicodeString& result) const
1209 {
1210 return getDisplayName(inDaylight,style, Locale::getDefault(), result);
1211 }
1212 //--------------------------------------
1213 int32_t
getDSTSavings() const1214 TimeZone::getDSTSavings()const {
1215 if (useDaylightTime()) {
1216 return 3600000;
1217 }
1218 return 0;
1219 }
1220 //---------------------------------------
1221 UnicodeString&
getDisplayName(UBool inDaylight,EDisplayType style,const Locale & locale,UnicodeString & result) const1222 TimeZone::getDisplayName(UBool inDaylight, EDisplayType style, const Locale& locale, UnicodeString& result) const
1223 {
1224 UErrorCode status = U_ZERO_ERROR;
1225 UDate date = Calendar::getNow();
1226 UTimeZoneFormatTimeType timeType = UTZFMT_TIME_TYPE_UNKNOWN;
1227 int32_t offset;
1228
1229 if (style == GENERIC_LOCATION || style == LONG_GENERIC || style == SHORT_GENERIC) {
1230 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1231 if (U_FAILURE(status)) {
1232 result.remove();
1233 return result;
1234 }
1235 // Generic format
1236 switch (style) {
1237 case GENERIC_LOCATION:
1238 tzfmt->format(UTZFMT_STYLE_GENERIC_LOCATION, *this, date, result, &timeType);
1239 break;
1240 case LONG_GENERIC:
1241 tzfmt->format(UTZFMT_STYLE_GENERIC_LONG, *this, date, result, &timeType);
1242 break;
1243 case SHORT_GENERIC:
1244 tzfmt->format(UTZFMT_STYLE_GENERIC_SHORT, *this, date, result, &timeType);
1245 break;
1246 default:
1247 UPRV_UNREACHABLE;
1248 }
1249 // Generic format many use Localized GMT as the final fallback.
1250 // When Localized GMT format is used, the result might not be
1251 // appropriate for the requested daylight value.
1252 if ((inDaylight && timeType == UTZFMT_TIME_TYPE_STANDARD) || (!inDaylight && timeType == UTZFMT_TIME_TYPE_DAYLIGHT)) {
1253 offset = inDaylight ? getRawOffset() + getDSTSavings() : getRawOffset();
1254 if (style == SHORT_GENERIC) {
1255 tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1256 } else {
1257 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1258 }
1259 }
1260 } else if (style == LONG_GMT || style == SHORT_GMT) {
1261 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1262 if (U_FAILURE(status)) {
1263 result.remove();
1264 return result;
1265 }
1266 offset = inDaylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1267 switch (style) {
1268 case LONG_GMT:
1269 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1270 break;
1271 case SHORT_GMT:
1272 tzfmt->formatOffsetISO8601Basic(offset, FALSE, FALSE, FALSE, result, status);
1273 break;
1274 default:
1275 UPRV_UNREACHABLE;
1276 }
1277
1278 } else {
1279 U_ASSERT(style == LONG || style == SHORT || style == SHORT_COMMONLY_USED);
1280 UTimeZoneNameType nameType = UTZNM_UNKNOWN;
1281 switch (style) {
1282 case LONG:
1283 nameType = inDaylight ? UTZNM_LONG_DAYLIGHT : UTZNM_LONG_STANDARD;
1284 break;
1285 case SHORT:
1286 case SHORT_COMMONLY_USED:
1287 nameType = inDaylight ? UTZNM_SHORT_DAYLIGHT : UTZNM_SHORT_STANDARD;
1288 break;
1289 default:
1290 UPRV_UNREACHABLE;
1291 }
1292 LocalPointer<TimeZoneNames> tznames(TimeZoneNames::createInstance(locale, status));
1293 if (U_FAILURE(status)) {
1294 result.remove();
1295 return result;
1296 }
1297 UnicodeString canonicalID(ZoneMeta::getCanonicalCLDRID(*this));
1298 tznames->getDisplayName(canonicalID, nameType, date, result);
1299 if (result.isEmpty()) {
1300 // Fallback to localized GMT
1301 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1302 offset = inDaylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1303 if (style == LONG) {
1304 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1305 } else {
1306 tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1307 }
1308 }
1309 }
1310 if (U_FAILURE(status)) {
1311 result.remove();
1312 }
1313 return result;
1314 }
1315
1316 /**
1317 * Parse a custom time zone identifier and return a corresponding zone.
1318 * @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
1319 * GMT[+-]hh.
1320 * @return a newly created SimpleTimeZone with the given offset and
1321 * no Daylight Savings Time, or null if the id cannot be parsed.
1322 */
1323 TimeZone*
createCustomTimeZone(const UnicodeString & id)1324 TimeZone::createCustomTimeZone(const UnicodeString& id)
1325 {
1326 int32_t sign, hour, min, sec;
1327 if (parseCustomID(id, sign, hour, min, sec)) {
1328 UnicodeString customID;
1329 formatCustomID(hour, min, sec, (sign < 0), customID);
1330 int32_t offset = sign * ((hour * 60 + min) * 60 + sec) * 1000;
1331 return new SimpleTimeZone(offset, customID);
1332 }
1333 return NULL;
1334 }
1335
1336 UnicodeString&
getCustomID(const UnicodeString & id,UnicodeString & normalized,UErrorCode & status)1337 TimeZone::getCustomID(const UnicodeString& id, UnicodeString& normalized, UErrorCode& status) {
1338 normalized.remove();
1339 if (U_FAILURE(status)) {
1340 return normalized;
1341 }
1342 int32_t sign, hour, min, sec;
1343 if (parseCustomID(id, sign, hour, min, sec)) {
1344 formatCustomID(hour, min, sec, (sign < 0), normalized);
1345 } else {
1346 status = U_ILLEGAL_ARGUMENT_ERROR;
1347 }
1348 return normalized;
1349 }
1350
1351 UBool
parseCustomID(const UnicodeString & id,int32_t & sign,int32_t & hour,int32_t & min,int32_t & sec)1352 TimeZone::parseCustomID(const UnicodeString& id, int32_t& sign,
1353 int32_t& hour, int32_t& min, int32_t& sec) {
1354 static const int32_t kParseFailed = -99999;
1355
1356 NumberFormat* numberFormat = 0;
1357 UnicodeString idUppercase = id;
1358 idUppercase.toUpper("");
1359
1360 if (id.length() > GMT_ID_LENGTH &&
1361 idUppercase.startsWith(GMT_ID, GMT_ID_LENGTH))
1362 {
1363 ParsePosition pos(GMT_ID_LENGTH);
1364 sign = 1;
1365 hour = 0;
1366 min = 0;
1367 sec = 0;
1368
1369 if (id[pos.getIndex()] == MINUS /*'-'*/) {
1370 sign = -1;
1371 } else if (id[pos.getIndex()] != PLUS /*'+'*/) {
1372 return FALSE;
1373 }
1374 pos.setIndex(pos.getIndex() + 1);
1375
1376 UErrorCode success = U_ZERO_ERROR;
1377 numberFormat = NumberFormat::createInstance(success);
1378 if(U_FAILURE(success)){
1379 return FALSE;
1380 }
1381 numberFormat->setParseIntegerOnly(TRUE);
1382 //numberFormat->setLenient(TRUE); // TODO: May need to set this, depends on latest timezone parsing
1383
1384 // Look for either hh:mm, hhmm, or hh
1385 int32_t start = pos.getIndex();
1386 Formattable n(kParseFailed);
1387 numberFormat->parse(id, n, pos);
1388 if (pos.getIndex() == start) {
1389 delete numberFormat;
1390 return FALSE;
1391 }
1392 hour = n.getLong();
1393
1394 if (pos.getIndex() < id.length()) {
1395 if (pos.getIndex() - start > 2
1396 || id[pos.getIndex()] != COLON) {
1397 delete numberFormat;
1398 return FALSE;
1399 }
1400 // hh:mm
1401 pos.setIndex(pos.getIndex() + 1);
1402 int32_t oldPos = pos.getIndex();
1403 n.setLong(kParseFailed);
1404 numberFormat->parse(id, n, pos);
1405 if ((pos.getIndex() - oldPos) != 2) {
1406 // must be 2 digits
1407 delete numberFormat;
1408 return FALSE;
1409 }
1410 min = n.getLong();
1411 if (pos.getIndex() < id.length()) {
1412 if (id[pos.getIndex()] != COLON) {
1413 delete numberFormat;
1414 return FALSE;
1415 }
1416 // [:ss]
1417 pos.setIndex(pos.getIndex() + 1);
1418 oldPos = pos.getIndex();
1419 n.setLong(kParseFailed);
1420 numberFormat->parse(id, n, pos);
1421 if (pos.getIndex() != id.length()
1422 || (pos.getIndex() - oldPos) != 2) {
1423 delete numberFormat;
1424 return FALSE;
1425 }
1426 sec = n.getLong();
1427 }
1428 } else {
1429 // Supported formats are below -
1430 //
1431 // HHmmss
1432 // Hmmss
1433 // HHmm
1434 // Hmm
1435 // HH
1436 // H
1437
1438 int32_t length = pos.getIndex() - start;
1439 if (length <= 0 || 6 < length) {
1440 // invalid length
1441 delete numberFormat;
1442 return FALSE;
1443 }
1444 switch (length) {
1445 case 1:
1446 case 2:
1447 // already set to hour
1448 break;
1449 case 3:
1450 case 4:
1451 min = hour % 100;
1452 hour /= 100;
1453 break;
1454 case 5:
1455 case 6:
1456 sec = hour % 100;
1457 min = (hour/100) % 100;
1458 hour /= 10000;
1459 break;
1460 }
1461 }
1462
1463 delete numberFormat;
1464
1465 if (hour > kMAX_CUSTOM_HOUR || min > kMAX_CUSTOM_MIN || sec > kMAX_CUSTOM_SEC) {
1466 return FALSE;
1467 }
1468 return TRUE;
1469 }
1470 return FALSE;
1471 }
1472
1473 UnicodeString&
formatCustomID(int32_t hour,int32_t min,int32_t sec,UBool negative,UnicodeString & id)1474 TimeZone::formatCustomID(int32_t hour, int32_t min, int32_t sec,
1475 UBool negative, UnicodeString& id) {
1476 // Create time zone ID - GMT[+|-]hhmm[ss]
1477 id.setTo(GMT_ID, GMT_ID_LENGTH);
1478 if (hour | min | sec) {
1479 if (negative) {
1480 id += (UChar)MINUS;
1481 } else {
1482 id += (UChar)PLUS;
1483 }
1484
1485 if (hour < 10) {
1486 id += (UChar)ZERO_DIGIT;
1487 } else {
1488 id += (UChar)(ZERO_DIGIT + hour/10);
1489 }
1490 id += (UChar)(ZERO_DIGIT + hour%10);
1491 id += (UChar)COLON;
1492 if (min < 10) {
1493 id += (UChar)ZERO_DIGIT;
1494 } else {
1495 id += (UChar)(ZERO_DIGIT + min/10);
1496 }
1497 id += (UChar)(ZERO_DIGIT + min%10);
1498
1499 if (sec) {
1500 id += (UChar)COLON;
1501 if (sec < 10) {
1502 id += (UChar)ZERO_DIGIT;
1503 } else {
1504 id += (UChar)(ZERO_DIGIT + sec/10);
1505 }
1506 id += (UChar)(ZERO_DIGIT + sec%10);
1507 }
1508 }
1509 return id;
1510 }
1511
1512
1513 UBool
hasSameRules(const TimeZone & other) const1514 TimeZone::hasSameRules(const TimeZone& other) const
1515 {
1516 return (getRawOffset() == other.getRawOffset() &&
1517 useDaylightTime() == other.useDaylightTime());
1518 }
1519
initTZDataVersion(UErrorCode & status)1520 static void U_CALLCONV initTZDataVersion(UErrorCode &status) {
1521 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
1522 int32_t len = 0;
1523 StackUResourceBundle bundle;
1524 ures_openDirectFillIn(bundle.getAlias(), NULL, kZONEINFO, &status);
1525 const UChar *tzver = ures_getStringByKey(bundle.getAlias(), kTZVERSION, &len, &status);
1526
1527 if (U_SUCCESS(status)) {
1528 if (len >= (int32_t)sizeof(TZDATA_VERSION)) {
1529 // Ensure that there is always space for a trailing nul in TZDATA_VERSION
1530 len = sizeof(TZDATA_VERSION) - 1;
1531 }
1532 u_UCharsToChars(tzver, TZDATA_VERSION, len);
1533 }
1534 }
1535
1536 const char*
getTZDataVersion(UErrorCode & status)1537 TimeZone::getTZDataVersion(UErrorCode& status)
1538 {
1539 umtx_initOnce(gTZDataVersionInitOnce, &initTZDataVersion, status);
1540 return (const char*)TZDATA_VERSION;
1541 }
1542
1543 UnicodeString&
getCanonicalID(const UnicodeString & id,UnicodeString & canonicalID,UErrorCode & status)1544 TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UErrorCode& status)
1545 {
1546 UBool isSystemID = FALSE;
1547 return getCanonicalID(id, canonicalID, isSystemID, status);
1548 }
1549
1550 UnicodeString&
getCanonicalID(const UnicodeString & id,UnicodeString & canonicalID,UBool & isSystemID,UErrorCode & status)1551 TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UBool& isSystemID,
1552 UErrorCode& status)
1553 {
1554 canonicalID.remove();
1555 isSystemID = FALSE;
1556 if (U_FAILURE(status)) {
1557 return canonicalID;
1558 }
1559 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) == 0) {
1560 // special case - Etc/Unknown is a canonical ID, but not system ID
1561 canonicalID.fastCopyFrom(id);
1562 isSystemID = FALSE;
1563 } else {
1564 ZoneMeta::getCanonicalCLDRID(id, canonicalID, status);
1565 if (U_SUCCESS(status)) {
1566 isSystemID = TRUE;
1567 } else {
1568 // Not a system ID
1569 status = U_ZERO_ERROR;
1570 getCustomID(id, canonicalID, status);
1571 }
1572 }
1573 return canonicalID;
1574 }
1575
1576 UnicodeString&
getWindowsID(const UnicodeString & id,UnicodeString & winid,UErrorCode & status)1577 TimeZone::getWindowsID(const UnicodeString& id, UnicodeString& winid, UErrorCode& status) {
1578 winid.remove();
1579 if (U_FAILURE(status)) {
1580 return winid;
1581 }
1582
1583 // canonicalize the input ID
1584 UnicodeString canonicalID;
1585 UBool isSystemID = FALSE;
1586
1587 getCanonicalID(id, canonicalID, isSystemID, status);
1588 if (U_FAILURE(status) || !isSystemID) {
1589 // mapping data is only applicable to tz database IDs
1590 if (status == U_ILLEGAL_ARGUMENT_ERROR) {
1591 // getWindowsID() sets an empty string where
1592 // getCanonicalID() sets a U_ILLEGAL_ARGUMENT_ERROR.
1593 status = U_ZERO_ERROR;
1594 }
1595 return winid;
1596 }
1597
1598 UResourceBundle *mapTimezones = ures_openDirect(NULL, "windowsZones", &status);
1599 ures_getByKey(mapTimezones, "mapTimezones", mapTimezones, &status);
1600
1601 if (U_FAILURE(status)) {
1602 return winid;
1603 }
1604
1605 UResourceBundle *winzone = NULL;
1606 UBool found = FALSE;
1607 while (ures_hasNext(mapTimezones) && !found) {
1608 winzone = ures_getNextResource(mapTimezones, winzone, &status);
1609 if (U_FAILURE(status)) {
1610 break;
1611 }
1612 if (ures_getType(winzone) != URES_TABLE) {
1613 continue;
1614 }
1615 UResourceBundle *regionalData = NULL;
1616 while (ures_hasNext(winzone) && !found) {
1617 regionalData = ures_getNextResource(winzone, regionalData, &status);
1618 if (U_FAILURE(status)) {
1619 break;
1620 }
1621 if (ures_getType(regionalData) != URES_STRING) {
1622 continue;
1623 }
1624 int32_t len;
1625 const UChar *tzids = ures_getString(regionalData, &len, &status);
1626 if (U_FAILURE(status)) {
1627 break;
1628 }
1629
1630 const UChar *start = tzids;
1631 UBool hasNext = TRUE;
1632 while (hasNext) {
1633 const UChar *end = u_strchr(start, (UChar)0x20);
1634 if (end == NULL) {
1635 end = tzids + len;
1636 hasNext = FALSE;
1637 }
1638 if (canonicalID.compare(start, static_cast<int32_t>(end - start)) == 0) {
1639 winid = UnicodeString(ures_getKey(winzone), -1 , US_INV);
1640 found = TRUE;
1641 break;
1642 }
1643 start = end + 1;
1644 }
1645 }
1646 ures_close(regionalData);
1647 }
1648 ures_close(winzone);
1649 ures_close(mapTimezones);
1650
1651 return winid;
1652 }
1653
1654 #define MAX_WINDOWS_ID_SIZE 128
1655
1656 UnicodeString&
getIDForWindowsID(const UnicodeString & winid,const char * region,UnicodeString & id,UErrorCode & status)1657 TimeZone::getIDForWindowsID(const UnicodeString& winid, const char* region, UnicodeString& id, UErrorCode& status) {
1658 id.remove();
1659 if (U_FAILURE(status)) {
1660 return id;
1661 }
1662
1663 UResourceBundle *zones = ures_openDirect(NULL, "windowsZones", &status);
1664 ures_getByKey(zones, "mapTimezones", zones, &status);
1665 if (U_FAILURE(status)) {
1666 ures_close(zones);
1667 return id;
1668 }
1669
1670 UErrorCode tmperr = U_ZERO_ERROR;
1671 char winidKey[MAX_WINDOWS_ID_SIZE];
1672 int32_t winKeyLen = winid.extract(0, winid.length(), winidKey, sizeof(winidKey) - 1, US_INV);
1673
1674 if (winKeyLen == 0 || winKeyLen >= (int32_t)sizeof(winidKey)) {
1675 ures_close(zones);
1676 return id;
1677 }
1678 winidKey[winKeyLen] = 0;
1679
1680 ures_getByKey(zones, winidKey, zones, &tmperr); // use tmperr, because windows mapping might not
1681 // be avaiable by design
1682 if (U_FAILURE(tmperr)) {
1683 ures_close(zones);
1684 return id;
1685 }
1686
1687 const UChar *tzid = NULL;
1688 int32_t len = 0;
1689 UBool gotID = FALSE;
1690 if (region) {
1691 const UChar *tzids = ures_getStringByKey(zones, region, &len, &tmperr); // use tmperr, because
1692 // regional mapping is optional
1693 if (U_SUCCESS(tmperr)) {
1694 // first ID delimited by space is the defasult one
1695 const UChar *end = u_strchr(tzids, (UChar)0x20);
1696 if (end == NULL) {
1697 id.setTo(tzids, -1);
1698 } else {
1699 id.setTo(tzids, static_cast<int32_t>(end - tzids));
1700 }
1701 gotID = TRUE;
1702 }
1703 }
1704
1705 if (!gotID) {
1706 tzid = ures_getStringByKey(zones, "001", &len, &status); // using status, because "001" must be
1707 // available at this point
1708 if (U_SUCCESS(status)) {
1709 id.setTo(tzid, len);
1710 }
1711 }
1712
1713 ures_close(zones);
1714 return id;
1715 }
1716
1717
1718 U_NAMESPACE_END
1719
1720 #endif /* #if !UCONFIG_NO_FORMATTING */
1721
1722 //eof
1723