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 static icu::TimeZone* _GMT = NULL;
119 static icu::TimeZone* _UNKNOWN_ZONE = NULL;
120 static icu::UInitOnce gStaticZonesInitOnce = U_INITONCE_INITIALIZER;
121
122 static char TZDATA_VERSION[16];
123 static icu::UInitOnce gTZDataVersionInitOnce = U_INITONCE_INITIALIZER;
124
125 static int32_t* MAP_SYSTEM_ZONES = NULL;
126 static int32_t* MAP_CANONICAL_SYSTEM_ZONES = NULL;
127 static int32_t* MAP_CANONICAL_SYSTEM_LOCATION_ZONES = NULL;
128
129 static int32_t LEN_SYSTEM_ZONES = 0;
130 static int32_t LEN_CANONICAL_SYSTEM_ZONES = 0;
131 static int32_t LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
132
133 static icu::UInitOnce gSystemZonesInitOnce = U_INITONCE_INITIALIZER;
134 static icu::UInitOnce gCanonicalZonesInitOnce = U_INITONCE_INITIALIZER;
135 static icu::UInitOnce gCanonicalLocationZonesInitOnce = U_INITONCE_INITIALIZER;
136
137 U_CDECL_BEGIN
timeZone_cleanup(void)138 static UBool U_CALLCONV timeZone_cleanup(void)
139 {
140 U_NAMESPACE_USE
141 delete DEFAULT_ZONE;
142 DEFAULT_ZONE = NULL;
143 gDefaultZoneInitOnce.reset();
144
145 delete _GMT;
146 _GMT = NULL;
147 delete _UNKNOWN_ZONE;
148 _UNKNOWN_ZONE = NULL;
149 gStaticZonesInitOnce.reset();
150
151 uprv_memset(TZDATA_VERSION, 0, sizeof(TZDATA_VERSION));
152 gTZDataVersionInitOnce.reset();
153
154 LEN_SYSTEM_ZONES = 0;
155 uprv_free(MAP_SYSTEM_ZONES);
156 MAP_SYSTEM_ZONES = 0;
157 gSystemZonesInitOnce.reset();
158
159 LEN_CANONICAL_SYSTEM_ZONES = 0;
160 uprv_free(MAP_CANONICAL_SYSTEM_ZONES);
161 MAP_CANONICAL_SYSTEM_ZONES = 0;
162 gCanonicalZonesInitOnce.reset();
163
164 LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
165 uprv_free(MAP_CANONICAL_SYSTEM_LOCATION_ZONES);
166 MAP_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
167 gCanonicalLocationZonesInitOnce.reset();
168
169 return TRUE;
170 }
171 U_CDECL_END
172
173 U_NAMESPACE_BEGIN
174
findInStringArray(UResourceBundle * array,const UnicodeString & id,UErrorCode & status)175 static int32_t findInStringArray(UResourceBundle* array, const UnicodeString& id, UErrorCode &status)
176 {
177 UnicodeString copy;
178 const UChar *u;
179 int32_t len;
180
181 int32_t start = 0;
182 int32_t limit = ures_getSize(array);
183 int32_t mid;
184 int32_t lastMid = INT32_MAX;
185 if(U_FAILURE(status) || (limit < 1)) {
186 return -1;
187 }
188 U_DEBUG_TZ_MSG(("fisa: Looking for %s, between %d and %d\n", U_DEBUG_TZ_STR(UnicodeString(id).getTerminatedBuffer()), start, limit));
189
190 for (;;) {
191 mid = (int32_t)((start + limit) / 2);
192 if (lastMid == mid) { /* Have we moved? */
193 break; /* We haven't moved, and it wasn't found. */
194 }
195 lastMid = mid;
196 u = ures_getStringByIndex(array, mid, &len, &status);
197 if (U_FAILURE(status)) {
198 break;
199 }
200 U_DEBUG_TZ_MSG(("tz: compare to %s, %d .. [%d] .. %d\n", U_DEBUG_TZ_STR(u), start, mid, limit));
201 copy.setTo(TRUE, u, len);
202 int r = id.compare(copy);
203 if(r==0) {
204 U_DEBUG_TZ_MSG(("fisa: found at %d\n", mid));
205 return mid;
206 } else if(r<0) {
207 limit = mid;
208 } else {
209 start = mid;
210 }
211 }
212 U_DEBUG_TZ_MSG(("fisa: not found\n"));
213 return -1;
214 }
215
216 /**
217 * Fetch a specific zone by name. Replaces the getByKey call.
218 * @param top Top timezone resource
219 * @param id Time zone ID
220 * @param oldbundle Bundle for reuse (or NULL). see 'ures_open()'
221 * @return the zone's bundle if found, or undefined if error. Reuses oldbundle.
222 */
getZoneByName(const UResourceBundle * top,const UnicodeString & id,UResourceBundle * oldbundle,UErrorCode & status)223 static UResourceBundle* getZoneByName(const UResourceBundle* top, const UnicodeString& id, UResourceBundle *oldbundle, UErrorCode& status) {
224 // load the Rules object
225 UResourceBundle *tmp = ures_getByKey(top, kNAMES, NULL, &status);
226
227 // search for the string
228 int32_t idx = findInStringArray(tmp, id, status);
229
230 if((idx == -1) && U_SUCCESS(status)) {
231 // not found
232 status = U_MISSING_RESOURCE_ERROR;
233 //ures_close(oldbundle);
234 //oldbundle = NULL;
235 } else {
236 U_DEBUG_TZ_MSG(("gzbn: oldbundle= size %d, type %d, %s\n", ures_getSize(tmp), ures_getType(tmp), u_errorName(status)));
237 tmp = ures_getByKey(top, kZONES, tmp, &status); // get Zones object from top
238 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)));
239 oldbundle = ures_getByIndex(tmp, idx, oldbundle, &status); // get nth Zone object
240 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)));
241 }
242 ures_close(tmp);
243 if(U_FAILURE(status)) {
244 //ures_close(oldbundle);
245 return NULL;
246 } else {
247 return oldbundle;
248 }
249 }
250
251
loadRule(const UResourceBundle * top,const UnicodeString & ruleid,UResourceBundle * oldbundle,UErrorCode & status)252 UResourceBundle* TimeZone::loadRule(const UResourceBundle* top, const UnicodeString& ruleid, UResourceBundle* oldbundle, UErrorCode& status) {
253 char key[64];
254 ruleid.extract(0, sizeof(key)-1, key, (int32_t)sizeof(key)-1, US_INV);
255 U_DEBUG_TZ_MSG(("loadRule(%s)\n", key));
256 UResourceBundle *r = ures_getByKey(top, kRULES, oldbundle, &status);
257 U_DEBUG_TZ_MSG(("loadRule(%s) -> kRULES [%s]\n", key, u_errorName(status)));
258 r = ures_getByKey(r, key, r, &status);
259 U_DEBUG_TZ_MSG(("loadRule(%s) -> item [%s]\n", key, u_errorName(status)));
260 return r;
261 }
262
263 /**
264 * Given an ID, open the appropriate resource for the given time zone.
265 * Dereference aliases if necessary.
266 * @param id zone id
267 * @param res resource, which must be ready for use (initialized but not open)
268 * @param ec input-output error code
269 * @return top-level resource bundle
270 */
openOlsonResource(const UnicodeString & id,UResourceBundle & res,UErrorCode & ec)271 static UResourceBundle* openOlsonResource(const UnicodeString& id,
272 UResourceBundle& res,
273 UErrorCode& ec)
274 {
275 #if U_DEBUG_TZ
276 char buf[128];
277 id.extract(0, sizeof(buf)-1, buf, sizeof(buf), "");
278 #endif
279 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
280 U_DEBUG_TZ_MSG(("pre: res sz=%d\n", ures_getSize(&res)));
281 /* &res = */ getZoneByName(top, id, &res, ec);
282 // Dereference if this is an alias. Docs say result should be 1
283 // but it is 0 in 2.8 (?).
284 U_DEBUG_TZ_MSG(("Loading zone '%s' (%s, size %d) - %s\n", buf, ures_getKey((UResourceBundle*)&res), ures_getSize(&res), u_errorName(ec)));
285 if (ures_getType(&res) == URES_INT) {
286 int32_t deref = ures_getInt(&res, &ec) + 0;
287 U_DEBUG_TZ_MSG(("getInt: %s - type is %d\n", u_errorName(ec), ures_getType(&res)));
288 UResourceBundle *ares = ures_getByKey(top, kZONES, NULL, &ec); // dereference Zones section
289 ures_getByIndex(ares, deref, &res, &ec);
290 ures_close(ares);
291 U_DEBUG_TZ_MSG(("alias to #%d (%s) - %s\n", deref, "??", u_errorName(ec)));
292 } else {
293 U_DEBUG_TZ_MSG(("not an alias - size %d\n", ures_getSize(&res)));
294 }
295 U_DEBUG_TZ_MSG(("%s - final status is %s\n", buf, u_errorName(ec)));
296 return top;
297 }
298
299 // -------------------------------------
300
301 namespace {
302
initStaticTimeZones()303 void U_CALLCONV initStaticTimeZones() {
304 // Initialize _GMT independently of other static data; it should
305 // be valid even if we can't load the time zone UDataMemory.
306 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
307 _UNKNOWN_ZONE = new SimpleTimeZone(0, UnicodeString(TRUE, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH));
308 _GMT = new SimpleTimeZone(0, UnicodeString(TRUE, GMT_ID, GMT_ID_LENGTH));
309 }
310
311 } // anonymous namespace
312
313 const TimeZone& U_EXPORT2
getUnknown()314 TimeZone::getUnknown()
315 {
316 umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
317 return *_UNKNOWN_ZONE;
318 }
319
320 const TimeZone* U_EXPORT2
getGMT(void)321 TimeZone::getGMT(void)
322 {
323 umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
324 return _GMT;
325 }
326
327 // *****************************************************************************
328 // class TimeZone
329 // *****************************************************************************
330
UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)331 UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)
332
333 TimeZone::TimeZone()
334 : UObject(), fID()
335 {
336 }
337
338 // -------------------------------------
339
TimeZone(const UnicodeString & id)340 TimeZone::TimeZone(const UnicodeString &id)
341 : UObject(), fID(id)
342 {
343 }
344
345 // -------------------------------------
346
~TimeZone()347 TimeZone::~TimeZone()
348 {
349 }
350
351 // -------------------------------------
352
TimeZone(const TimeZone & source)353 TimeZone::TimeZone(const TimeZone &source)
354 : UObject(source), fID(source.fID)
355 {
356 }
357
358 // -------------------------------------
359
360 TimeZone &
operator =(const TimeZone & right)361 TimeZone::operator=(const TimeZone &right)
362 {
363 if (this != &right) fID = right.fID;
364 return *this;
365 }
366
367 // -------------------------------------
368
369 UBool
operator ==(const TimeZone & that) const370 TimeZone::operator==(const TimeZone& that) const
371 {
372 return typeid(*this) == typeid(that) &&
373 fID == that.fID;
374 }
375
376 // -------------------------------------
377
378 namespace {
379 TimeZone*
createSystemTimeZone(const UnicodeString & id,UErrorCode & ec)380 createSystemTimeZone(const UnicodeString& id, UErrorCode& ec) {
381 if (U_FAILURE(ec)) {
382 return NULL;
383 }
384 TimeZone* z = 0;
385 UResourceBundle res;
386 ures_initStackObject(&res);
387 U_DEBUG_TZ_MSG(("pre-err=%s\n", u_errorName(ec)));
388 UResourceBundle *top = openOlsonResource(id, res, ec);
389 U_DEBUG_TZ_MSG(("post-err=%s\n", u_errorName(ec)));
390 if (U_SUCCESS(ec)) {
391 z = new OlsonTimeZone(top, &res, id, ec);
392 if (z == NULL) {
393 U_DEBUG_TZ_MSG(("cstz: olson time zone failed to initialize - err %s\n", u_errorName(ec)));
394 }
395 }
396 ures_close(&res);
397 ures_close(top);
398 if (U_FAILURE(ec)) {
399 U_DEBUG_TZ_MSG(("cstz: failed to create, err %s\n", u_errorName(ec)));
400 delete z;
401 z = 0;
402 }
403 return z;
404 }
405
406 /**
407 * Lookup the given name in our system zone table. If found,
408 * instantiate a new zone of that name and return it. If not
409 * found, return 0.
410 */
411 TimeZone*
createSystemTimeZone(const UnicodeString & id)412 createSystemTimeZone(const UnicodeString& id) {
413 UErrorCode ec = U_ZERO_ERROR;
414 return createSystemTimeZone(id, ec);
415 }
416
417 }
418
419 TimeZone* U_EXPORT2
createTimeZone(const UnicodeString & ID)420 TimeZone::createTimeZone(const UnicodeString& ID)
421 {
422 /* We first try to lookup the zone ID in our system list. If this
423 * fails, we try to parse it as a custom string GMT[+-]hh:mm. If
424 * all else fails, we return GMT, which is probably not what the
425 * user wants, but at least is a functioning TimeZone object.
426 *
427 * We cannot return NULL, because that would break compatibility
428 * with the JDK.
429 */
430 TimeZone* result = createSystemTimeZone(ID);
431
432 if (result == NULL) {
433 U_DEBUG_TZ_MSG(("failed to load system time zone with id - falling to custom"));
434 result = createCustomTimeZone(ID);
435 }
436 if (result == NULL) {
437 U_DEBUG_TZ_MSG(("failed to load time zone with id - falling to Etc/Unknown(GMT)"));
438 const TimeZone& unknown = getUnknown();
439 if (_UNKNOWN_ZONE == NULL) { // Cannot test (&unknown == NULL) because the
440 U_DEBUG_TZ_MSG(("failed to getUnknown()")); // behavior of NULL references is undefined.
441 } else {
442 result = unknown.clone();
443 }
444 }
445 return result;
446 }
447
448 // -------------------------------------
449
450 TimeZone* U_EXPORT2
detectHostTimeZone()451 TimeZone::detectHostTimeZone()
452 {
453 // We access system timezone data through TPlatformUtilities,
454 // including tzset(), timezone, and tzname[].
455 int32_t rawOffset = 0;
456 const char *hostID;
457
458 // First, try to create a system timezone, based
459 // on the string ID in tzname[0].
460
461 uprv_tzset(); // Initialize tz... system data
462
463 uprv_tzname_clear_cache();
464
465 // Get the timezone ID from the host. This function should do
466 // any required host-specific remapping; e.g., on Windows this
467 // function maps the Date and Time control panel setting to an
468 // ICU timezone ID.
469 hostID = uprv_tzname(0);
470
471 // Invert sign because UNIX semantics are backwards
472 rawOffset = uprv_timezone() * -U_MILLIS_PER_SECOND;
473
474 TimeZone* hostZone = NULL;
475
476 /* Make sure that the string is NULL terminated to prevent BoundsChecker/Purify warnings. */
477 UnicodeString hostStrID(hostID, -1, US_INV);
478 hostStrID.append((UChar)0);
479 hostStrID.truncate(hostStrID.length()-1);
480 hostZone = createSystemTimeZone(hostStrID);
481
482 #if U_PLATFORM_USES_ONLY_WIN32_API
483 // hostID points to a heap-allocated location on Windows.
484 uprv_free(const_cast<char *>(hostID));
485 #endif
486
487 int32_t hostIDLen = hostStrID.length();
488 if (hostZone != NULL && rawOffset != hostZone->getRawOffset()
489 && (3 <= hostIDLen && hostIDLen <= 4))
490 {
491 // Uh oh. This probably wasn't a good id.
492 // It was probably an ambiguous abbreviation
493 delete hostZone;
494 hostZone = NULL;
495 }
496
497 // Construct a fixed standard zone with the host's ID
498 // and raw offset.
499 if (hostZone == NULL) {
500 hostZone = new SimpleTimeZone(rawOffset, hostStrID);
501 }
502
503 // If we _still_ don't have a time zone, use GMT.
504 //
505 // Note: This is extremely unlikely situation. If
506 // new SimpleTimeZone(...) above fails, the following
507 // code may also fail.
508 if (hostZone == NULL) {
509 const TimeZone* temptz = TimeZone::getGMT();
510 // If we can't use GMT, get out.
511 if (temptz == NULL) {
512 return NULL;
513 }
514 hostZone = temptz->clone();
515 }
516
517 return hostZone;
518 }
519
520 // -------------------------------------
521
522 /**
523 * Initialize DEFAULT_ZONE from the system default time zone.
524 * Upon return, DEFAULT_ZONE will not be NULL, unless operator new()
525 * returns NULL.
526 */
initDefault()527 static void U_CALLCONV initDefault()
528 {
529 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
530
531 // If setDefault() has already been called we can skip getting the
532 // default zone information from the system.
533 if (DEFAULT_ZONE != NULL) {
534 return;
535 }
536
537 // NOTE: this code is safely single threaded, being only
538 // run via umtx_initOnce().
539 //
540 // Some of the locale/timezone OS functions may not be thread safe,
541 //
542 // The operating system might actually use ICU to implement timezones.
543 // So we may have ICU calling ICU here, like on AIX.
544 // There shouldn't be a problem with this; initOnce does not hold a mutex
545 // while the init function is being run.
546
547 // The code detecting the host time zone was separated from this
548 // and implemented as TimeZone::detectHostTimeZone()
549
550 TimeZone *default_zone = TimeZone::detectHostTimeZone();
551
552 // The only way for DEFAULT_ZONE to be non-null at this point is if the user
553 // made a thread-unsafe call to setDefault() or adoptDefault() in another
554 // thread while this thread was doing something that required getting the default.
555 U_ASSERT(DEFAULT_ZONE == NULL);
556
557 DEFAULT_ZONE = default_zone;
558 }
559
560 // -------------------------------------
561
562 TimeZone* U_EXPORT2
createDefault()563 TimeZone::createDefault()
564 {
565 umtx_initOnce(gDefaultZoneInitOnce, initDefault);
566 return (DEFAULT_ZONE != NULL) ? DEFAULT_ZONE->clone() : NULL;
567 }
568
569 // -------------------------------------
570
571 void U_EXPORT2
adoptDefault(TimeZone * zone)572 TimeZone::adoptDefault(TimeZone* zone)
573 {
574 if (zone != NULL)
575 {
576 TimeZone *old = DEFAULT_ZONE;
577 DEFAULT_ZONE = zone;
578 delete old;
579 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
580 }
581 }
582 // -------------------------------------
583
584 void U_EXPORT2
setDefault(const TimeZone & zone)585 TimeZone::setDefault(const TimeZone& zone)
586 {
587 adoptDefault(zone.clone());
588 }
589
590 //----------------------------------------------------------------------
591
592
initMap(USystemTimeZoneType type,UErrorCode & ec)593 static void U_CALLCONV initMap(USystemTimeZoneType type, UErrorCode& ec) {
594 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
595
596 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
597 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
598 if (U_SUCCESS(ec)) {
599 int32_t size = ures_getSize(res);
600 int32_t *m = (int32_t *)uprv_malloc(size * sizeof(int32_t));
601 if (m == NULL) {
602 ec = U_MEMORY_ALLOCATION_ERROR;
603 } else {
604 int32_t numEntries = 0;
605 for (int32_t i = 0; i < size; i++) {
606 UnicodeString id = ures_getUnicodeStringByIndex(res, i, &ec);
607 if (U_FAILURE(ec)) {
608 break;
609 }
610 if (0 == id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH)) {
611 // exclude Etc/Unknown
612 continue;
613 }
614 if (type == UCAL_ZONE_TYPE_CANONICAL || type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
615 UnicodeString canonicalID;
616 ZoneMeta::getCanonicalCLDRID(id, canonicalID, ec);
617 if (U_FAILURE(ec)) {
618 break;
619 }
620 if (canonicalID != id) {
621 // exclude aliases
622 continue;
623 }
624 }
625 if (type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
626 const UChar *region = TimeZone::getRegion(id, ec);
627 if (U_FAILURE(ec)) {
628 break;
629 }
630 if (u_strcmp(region, WORLD) == 0) {
631 // exclude non-location ("001")
632 continue;
633 }
634 }
635 m[numEntries++] = i;
636 }
637 if (U_SUCCESS(ec)) {
638 int32_t *tmp = m;
639 m = (int32_t *)uprv_realloc(tmp, numEntries * sizeof(int32_t));
640 if (m == NULL) {
641 // realloc failed.. use the original one even it has unused
642 // area at the end
643 m = tmp;
644 }
645
646 switch(type) {
647 case UCAL_ZONE_TYPE_ANY:
648 U_ASSERT(MAP_SYSTEM_ZONES == NULL);
649 MAP_SYSTEM_ZONES = m;
650 LEN_SYSTEM_ZONES = numEntries;
651 break;
652 case UCAL_ZONE_TYPE_CANONICAL:
653 U_ASSERT(MAP_CANONICAL_SYSTEM_ZONES == NULL);
654 MAP_CANONICAL_SYSTEM_ZONES = m;
655 LEN_CANONICAL_SYSTEM_ZONES = numEntries;
656 break;
657 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
658 U_ASSERT(MAP_CANONICAL_SYSTEM_LOCATION_ZONES == NULL);
659 MAP_CANONICAL_SYSTEM_LOCATION_ZONES = m;
660 LEN_CANONICAL_SYSTEM_LOCATION_ZONES = numEntries;
661 break;
662 }
663 }
664 }
665 }
666 ures_close(res);
667 }
668
669
670 /**
671 * This is the default implementation for subclasses that do not
672 * override this method. This implementation calls through to the
673 * 8-argument getOffset() method after suitable computations, and
674 * correctly adjusts GMT millis to local millis when necessary.
675 */
getOffset(UDate date,UBool local,int32_t & rawOffset,int32_t & dstOffset,UErrorCode & ec) const676 void TimeZone::getOffset(UDate date, UBool local, int32_t& rawOffset,
677 int32_t& dstOffset, UErrorCode& ec) const {
678 if (U_FAILURE(ec)) {
679 return;
680 }
681
682 rawOffset = getRawOffset();
683 if (!local) {
684 date += rawOffset; // now in local standard millis
685 }
686
687 // When local == TRUE, date might not be in local standard
688 // millis. getOffset taking 7 parameters used here assume
689 // the given time in day is local standard time.
690 // At STD->DST transition, there is a range of time which
691 // does not exist. When 'date' is in this time range
692 // (and local == TRUE), this method interprets the specified
693 // local time as DST. At DST->STD transition, there is a
694 // range of time which occurs twice. In this case, this
695 // method interprets the specified local time as STD.
696 // To support the behavior above, we need to call getOffset
697 // (with 7 args) twice when local == true and DST is
698 // detected in the initial call.
699 for (int32_t pass=0; ; ++pass) {
700 int32_t year, month, dom, dow;
701 double day = uprv_floor(date / U_MILLIS_PER_DAY);
702 int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
703
704 Grego::dayToFields(day, year, month, dom, dow);
705
706 dstOffset = getOffset(GregorianCalendar::AD, year, month, dom,
707 (uint8_t) dow, millis,
708 Grego::monthLength(year, month),
709 ec) - rawOffset;
710
711 // Recompute if local==TRUE, dstOffset!=0.
712 if (pass!=0 || !local || dstOffset == 0) {
713 break;
714 }
715 // adjust to local standard millis
716 date -= dstOffset;
717 }
718 }
719
720 // -------------------------------------
721
722 // New available IDs API as of ICU 2.4. Uses StringEnumeration API.
723
724 class TZEnumeration : public StringEnumeration {
725 private:
726
727 // Map into to zones. Our results are zone[map[i]] for
728 // i=0..len-1, where zone[i] is the i-th Olson zone. If map==NULL
729 // then our results are zone[i] for i=0..len-1. Len will be zero
730 // if the zone data could not be loaded.
731 int32_t* map;
732 int32_t* localMap;
733 int32_t len;
734 int32_t pos;
735
TZEnumeration(int32_t * mapData,int32_t mapLen,UBool adoptMapData)736 TZEnumeration(int32_t* mapData, int32_t mapLen, UBool adoptMapData) : pos(0) {
737 map = mapData;
738 localMap = adoptMapData ? mapData : NULL;
739 len = mapLen;
740 }
741
getID(int32_t i,UErrorCode & ec)742 UBool getID(int32_t i, UErrorCode& ec) {
743 int32_t idLen = 0;
744 const UChar* id = NULL;
745 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
746 top = ures_getByKey(top, kNAMES, top, &ec); // dereference Zones section
747 id = ures_getStringByIndex(top, i, &idLen, &ec);
748 if(U_FAILURE(ec)) {
749 unistr.truncate(0);
750 }
751 else {
752 unistr.fastCopyFrom(UnicodeString(TRUE, id, idLen));
753 }
754 ures_close(top);
755 return U_SUCCESS(ec);
756 }
757
getMap(USystemTimeZoneType type,int32_t & len,UErrorCode & ec)758 static int32_t* getMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) {
759 len = 0;
760 if (U_FAILURE(ec)) {
761 return NULL;
762 }
763 int32_t* m = NULL;
764 switch (type) {
765 case UCAL_ZONE_TYPE_ANY:
766 umtx_initOnce(gSystemZonesInitOnce, &initMap, type, ec);
767 m = MAP_SYSTEM_ZONES;
768 len = LEN_SYSTEM_ZONES;
769 break;
770 case UCAL_ZONE_TYPE_CANONICAL:
771 umtx_initOnce(gCanonicalZonesInitOnce, &initMap, type, ec);
772 m = MAP_CANONICAL_SYSTEM_ZONES;
773 len = LEN_CANONICAL_SYSTEM_ZONES;
774 break;
775 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
776 umtx_initOnce(gCanonicalLocationZonesInitOnce, &initMap, type, ec);
777 m = MAP_CANONICAL_SYSTEM_LOCATION_ZONES;
778 len = LEN_CANONICAL_SYSTEM_LOCATION_ZONES;
779 break;
780 default:
781 ec = U_ILLEGAL_ARGUMENT_ERROR;
782 m = NULL;
783 len = 0;
784 break;
785 }
786 return m;
787 }
788
789 public:
790
791 #define DEFAULT_FILTERED_MAP_SIZE 8
792 #define MAP_INCREMENT_SIZE 8
793
create(USystemTimeZoneType type,const char * region,const int32_t * rawOffset,UErrorCode & ec)794 static TZEnumeration* create(USystemTimeZoneType type, const char* region, const int32_t* rawOffset, UErrorCode& ec) {
795 if (U_FAILURE(ec)) {
796 return NULL;
797 }
798
799 int32_t baseLen;
800 int32_t *baseMap = getMap(type, baseLen, ec);
801
802 if (U_FAILURE(ec)) {
803 return NULL;
804 }
805
806 // If any additional conditions are available,
807 // create instance local map filtered by the conditions.
808
809 int32_t *filteredMap = NULL;
810 int32_t numEntries = 0;
811
812 if (region != NULL || rawOffset != NULL) {
813 int32_t filteredMapSize = DEFAULT_FILTERED_MAP_SIZE;
814 filteredMap = (int32_t *)uprv_malloc(filteredMapSize * sizeof(int32_t));
815 if (filteredMap == NULL) {
816 ec = U_MEMORY_ALLOCATION_ERROR;
817 return NULL;
818 }
819
820 // Walk through the base map
821 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
822 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
823 for (int32_t i = 0; i < baseLen; i++) {
824 int32_t zidx = baseMap[i];
825 UnicodeString id = ures_getUnicodeStringByIndex(res, zidx, &ec);
826 if (U_FAILURE(ec)) {
827 break;
828 }
829 if (region != NULL) {
830 // Filter by region
831 char tzregion[4]; // max 3 letters + null term
832 TimeZone::getRegion(id, tzregion, sizeof(tzregion), ec);
833 if (U_FAILURE(ec)) {
834 break;
835 }
836 if (uprv_stricmp(tzregion, region) != 0) {
837 // region does not match
838 continue;
839 }
840 }
841 if (rawOffset != NULL) {
842 // Filter by raw offset
843 // Note: This is VERY inefficient
844 TimeZone *z = createSystemTimeZone(id, ec);
845 if (U_FAILURE(ec)) {
846 break;
847 }
848 int32_t tzoffset = z->getRawOffset();
849 delete z;
850
851 if (tzoffset != *rawOffset) {
852 continue;
853 }
854 }
855
856 if (filteredMapSize <= numEntries) {
857 filteredMapSize += MAP_INCREMENT_SIZE;
858 int32_t *tmp = (int32_t *)uprv_realloc(filteredMap, filteredMapSize * sizeof(int32_t));
859 if (tmp == NULL) {
860 ec = U_MEMORY_ALLOCATION_ERROR;
861 break;
862 } else {
863 filteredMap = tmp;
864 }
865 }
866
867 filteredMap[numEntries++] = zidx;
868 }
869
870 if (U_FAILURE(ec)) {
871 uprv_free(filteredMap);
872 filteredMap = NULL;
873 }
874
875 ures_close(res);
876 }
877
878 TZEnumeration *result = NULL;
879 if (U_SUCCESS(ec)) {
880 // Finally, create a new enumeration instance
881 if (filteredMap == NULL) {
882 result = new TZEnumeration(baseMap, baseLen, FALSE);
883 } else {
884 result = new TZEnumeration(filteredMap, numEntries, TRUE);
885 filteredMap = NULL;
886 }
887 if (result == NULL) {
888 ec = U_MEMORY_ALLOCATION_ERROR;
889 }
890 }
891
892 if (filteredMap != NULL) {
893 uprv_free(filteredMap);
894 }
895
896 return result;
897 }
898
TZEnumeration(const TZEnumeration & other)899 TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(NULL), localMap(NULL), len(0), pos(0) {
900 if (other.localMap != NULL) {
901 localMap = (int32_t *)uprv_malloc(other.len * sizeof(int32_t));
902 if (localMap != NULL) {
903 len = other.len;
904 uprv_memcpy(localMap, other.localMap, len * sizeof(int32_t));
905 pos = other.pos;
906 map = localMap;
907 } else {
908 len = 0;
909 pos = 0;
910 map = NULL;
911 }
912 } else {
913 map = other.map;
914 localMap = NULL;
915 len = other.len;
916 pos = other.pos;
917 }
918 }
919
920 virtual ~TZEnumeration();
921
clone() const922 virtual StringEnumeration *clone() const {
923 return new TZEnumeration(*this);
924 }
925
count(UErrorCode & status) const926 virtual int32_t count(UErrorCode& status) const {
927 return U_FAILURE(status) ? 0 : len;
928 }
929
snext(UErrorCode & status)930 virtual const UnicodeString* snext(UErrorCode& status) {
931 if (U_SUCCESS(status) && map != NULL && pos < len) {
932 getID(map[pos], status);
933 ++pos;
934 return &unistr;
935 }
936 return 0;
937 }
938
reset(UErrorCode &)939 virtual void reset(UErrorCode& /*status*/) {
940 pos = 0;
941 }
942
943 public:
944 static UClassID U_EXPORT2 getStaticClassID(void);
945 virtual UClassID getDynamicClassID(void) const;
946 };
947
~TZEnumeration()948 TZEnumeration::~TZEnumeration() {
949 if (localMap != NULL) {
950 uprv_free(localMap);
951 }
952 }
953
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)954 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)
955
956 StringEnumeration* U_EXPORT2
957 TimeZone::createTimeZoneIDEnumeration(
958 USystemTimeZoneType zoneType,
959 const char* region,
960 const int32_t* rawOffset,
961 UErrorCode& ec) {
962 return TZEnumeration::create(zoneType, region, rawOffset, ec);
963 }
964
965 StringEnumeration* U_EXPORT2
createEnumeration()966 TimeZone::createEnumeration() {
967 UErrorCode ec = U_ZERO_ERROR;
968 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, NULL, ec);
969 }
970
971 StringEnumeration* U_EXPORT2
createEnumeration(int32_t rawOffset)972 TimeZone::createEnumeration(int32_t rawOffset) {
973 UErrorCode ec = U_ZERO_ERROR;
974 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, &rawOffset, ec);
975 }
976
977 StringEnumeration* U_EXPORT2
createEnumeration(const char * country)978 TimeZone::createEnumeration(const char* country) {
979 UErrorCode ec = U_ZERO_ERROR;
980 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, country, NULL, ec);
981 }
982
983 // ---------------------------------------
984
985 int32_t U_EXPORT2
countEquivalentIDs(const UnicodeString & id)986 TimeZone::countEquivalentIDs(const UnicodeString& id) {
987 int32_t result = 0;
988 UErrorCode ec = U_ZERO_ERROR;
989 UResourceBundle res;
990 ures_initStackObject(&res);
991 U_DEBUG_TZ_MSG(("countEquivalentIDs..\n"));
992 UResourceBundle *top = openOlsonResource(id, res, ec);
993 if (U_SUCCESS(ec)) {
994 UResourceBundle r;
995 ures_initStackObject(&r);
996 ures_getByKey(&res, kLINKS, &r, &ec);
997 ures_getIntVector(&r, &result, &ec);
998 ures_close(&r);
999 }
1000 ures_close(&res);
1001 ures_close(top);
1002 return result;
1003 }
1004
1005 // ---------------------------------------
1006
1007 const UnicodeString U_EXPORT2
getEquivalentID(const UnicodeString & id,int32_t index)1008 TimeZone::getEquivalentID(const UnicodeString& id, int32_t index) {
1009 U_DEBUG_TZ_MSG(("gEI(%d)\n", index));
1010 UnicodeString result;
1011 UErrorCode ec = U_ZERO_ERROR;
1012 UResourceBundle res;
1013 ures_initStackObject(&res);
1014 UResourceBundle *top = openOlsonResource(id, res, ec);
1015 int32_t zone = -1;
1016 if (U_SUCCESS(ec)) {
1017 UResourceBundle r;
1018 ures_initStackObject(&r);
1019 int32_t size;
1020 ures_getByKey(&res, kLINKS, &r, &ec);
1021 const int32_t* v = ures_getIntVector(&r, &size, &ec);
1022 if (U_SUCCESS(ec)) {
1023 if (index >= 0 && index < size) {
1024 zone = v[index];
1025 }
1026 }
1027 ures_close(&r);
1028 }
1029 ures_close(&res);
1030 if (zone >= 0) {
1031 UResourceBundle *ares = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Zones section
1032 if (U_SUCCESS(ec)) {
1033 int32_t idLen = 0;
1034 const UChar* id2 = ures_getStringByIndex(ares, zone, &idLen, &ec);
1035 result.fastCopyFrom(UnicodeString(TRUE, id2, idLen));
1036 U_DEBUG_TZ_MSG(("gei(%d) -> %d, len%d, %s\n", index, zone, result.length(), u_errorName(ec)));
1037 }
1038 ures_close(ares);
1039 }
1040 ures_close(top);
1041 #if defined(U_DEBUG_TZ)
1042 if(result.length() ==0) {
1043 U_DEBUG_TZ_MSG(("equiv [__, #%d] -> 0 (%s)\n", index, u_errorName(ec)));
1044 }
1045 #endif
1046 return result;
1047 }
1048
1049 // ---------------------------------------
1050
1051 // These methods are used by ZoneMeta class only.
1052
1053 const UChar*
findID(const UnicodeString & id)1054 TimeZone::findID(const UnicodeString& id) {
1055 const UChar *result = NULL;
1056 UErrorCode ec = U_ZERO_ERROR;
1057 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1058
1059 // resolve zone index by name
1060 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1061 int32_t idx = findInStringArray(names, id, ec);
1062 result = ures_getStringByIndex(names, idx, NULL, &ec);
1063 if (U_FAILURE(ec)) {
1064 result = NULL;
1065 }
1066 ures_close(names);
1067 ures_close(rb);
1068 return result;
1069 }
1070
1071
1072 const UChar*
dereferOlsonLink(const UnicodeString & id)1073 TimeZone::dereferOlsonLink(const UnicodeString& id) {
1074 const UChar *result = NULL;
1075 UErrorCode ec = U_ZERO_ERROR;
1076 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1077
1078 // resolve zone index by name
1079 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1080 int32_t idx = findInStringArray(names, id, ec);
1081 result = ures_getStringByIndex(names, idx, NULL, &ec);
1082
1083 // open the zone bundle by index
1084 ures_getByKey(rb, kZONES, rb, &ec);
1085 ures_getByIndex(rb, idx, rb, &ec);
1086
1087 if (U_SUCCESS(ec)) {
1088 if (ures_getType(rb) == URES_INT) {
1089 // this is a link - dereference the link
1090 int32_t deref = ures_getInt(rb, &ec);
1091 const UChar* tmp = ures_getStringByIndex(names, deref, NULL, &ec);
1092 if (U_SUCCESS(ec)) {
1093 result = tmp;
1094 }
1095 }
1096 }
1097
1098 ures_close(names);
1099 ures_close(rb);
1100
1101 return result;
1102 }
1103
1104 const UChar*
getRegion(const UnicodeString & id)1105 TimeZone::getRegion(const UnicodeString& id) {
1106 UErrorCode status = U_ZERO_ERROR;
1107 return getRegion(id, status);
1108 }
1109
1110 const UChar*
getRegion(const UnicodeString & id,UErrorCode & status)1111 TimeZone::getRegion(const UnicodeString& id, UErrorCode& status) {
1112 if (U_FAILURE(status)) {
1113 return NULL;
1114 }
1115 const UChar *result = NULL;
1116 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &status);
1117
1118 // resolve zone index by name
1119 UResourceBundle *res = ures_getByKey(rb, kNAMES, NULL, &status);
1120 int32_t idx = findInStringArray(res, id, status);
1121
1122 // get region mapping
1123 ures_getByKey(rb, kREGIONS, res, &status);
1124 const UChar *tmp = ures_getStringByIndex(res, idx, NULL, &status);
1125 if (U_SUCCESS(status)) {
1126 result = tmp;
1127 }
1128
1129 ures_close(res);
1130 ures_close(rb);
1131
1132 return result;
1133 }
1134
1135
1136 // ---------------------------------------
1137 int32_t
getRegion(const UnicodeString & id,char * region,int32_t capacity,UErrorCode & status)1138 TimeZone::getRegion(const UnicodeString& id, char *region, int32_t capacity, UErrorCode& status)
1139 {
1140 int32_t resultLen = 0;
1141 *region = 0;
1142 if (U_FAILURE(status)) {
1143 return 0;
1144 }
1145
1146 const UChar *uregion = NULL;
1147 // "Etc/Unknown" is not a system zone ID,
1148 // but in the zone data
1149 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) != 0) {
1150 uregion = getRegion(id);
1151 }
1152 if (uregion == NULL) {
1153 status = U_ILLEGAL_ARGUMENT_ERROR;
1154 return 0;
1155 }
1156 resultLen = u_strlen(uregion);
1157 // A region code is represented by invariant characters
1158 u_UCharsToChars(uregion, region, uprv_min(resultLen, capacity));
1159
1160 if (capacity < resultLen) {
1161 status = U_BUFFER_OVERFLOW_ERROR;
1162 return resultLen;
1163 }
1164
1165 return u_terminateChars(region, capacity, resultLen, &status);
1166 }
1167
1168 // ---------------------------------------
1169
1170
1171 UnicodeString&
getDisplayName(UnicodeString & result) const1172 TimeZone::getDisplayName(UnicodeString& result) const
1173 {
1174 return getDisplayName(FALSE,LONG,Locale::getDefault(), result);
1175 }
1176
1177 UnicodeString&
getDisplayName(const Locale & locale,UnicodeString & result) const1178 TimeZone::getDisplayName(const Locale& locale, UnicodeString& result) const
1179 {
1180 return getDisplayName(FALSE, LONG, locale, result);
1181 }
1182
1183 UnicodeString&
getDisplayName(UBool daylight,EDisplayType style,UnicodeString & result) const1184 TimeZone::getDisplayName(UBool daylight, EDisplayType style, UnicodeString& result) const
1185 {
1186 return getDisplayName(daylight,style, Locale::getDefault(), result);
1187 }
1188 //--------------------------------------
1189 int32_t
getDSTSavings() const1190 TimeZone::getDSTSavings()const {
1191 if (useDaylightTime()) {
1192 return 3600000;
1193 }
1194 return 0;
1195 }
1196 //---------------------------------------
1197 UnicodeString&
getDisplayName(UBool daylight,EDisplayType style,const Locale & locale,UnicodeString & result) const1198 TimeZone::getDisplayName(UBool daylight, EDisplayType style, const Locale& locale, UnicodeString& result) const
1199 {
1200 UErrorCode status = U_ZERO_ERROR;
1201 UDate date = Calendar::getNow();
1202 UTimeZoneFormatTimeType timeType = UTZFMT_TIME_TYPE_UNKNOWN;
1203 int32_t offset;
1204
1205 if (style == GENERIC_LOCATION || style == LONG_GENERIC || style == SHORT_GENERIC) {
1206 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1207 if (U_FAILURE(status)) {
1208 result.remove();
1209 return result;
1210 }
1211 // Generic format
1212 switch (style) {
1213 case GENERIC_LOCATION:
1214 tzfmt->format(UTZFMT_STYLE_GENERIC_LOCATION, *this, date, result, &timeType);
1215 break;
1216 case LONG_GENERIC:
1217 tzfmt->format(UTZFMT_STYLE_GENERIC_LONG, *this, date, result, &timeType);
1218 break;
1219 case SHORT_GENERIC:
1220 tzfmt->format(UTZFMT_STYLE_GENERIC_SHORT, *this, date, result, &timeType);
1221 break;
1222 default:
1223 U_ASSERT(FALSE);
1224 }
1225 // Generic format many use Localized GMT as the final fallback.
1226 // When Localized GMT format is used, the result might not be
1227 // appropriate for the requested daylight value.
1228 if ((daylight && timeType == UTZFMT_TIME_TYPE_STANDARD) || (!daylight && timeType == UTZFMT_TIME_TYPE_DAYLIGHT)) {
1229 offset = daylight ? getRawOffset() + getDSTSavings() : getRawOffset();
1230 if (style == SHORT_GENERIC) {
1231 tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1232 } else {
1233 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1234 }
1235 }
1236 } else if (style == LONG_GMT || style == SHORT_GMT) {
1237 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1238 if (U_FAILURE(status)) {
1239 result.remove();
1240 return result;
1241 }
1242 offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1243 switch (style) {
1244 case LONG_GMT:
1245 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1246 break;
1247 case SHORT_GMT:
1248 tzfmt->formatOffsetISO8601Basic(offset, FALSE, FALSE, FALSE, result, status);
1249 break;
1250 default:
1251 U_ASSERT(FALSE);
1252 }
1253
1254 } else {
1255 U_ASSERT(style == LONG || style == SHORT || style == SHORT_COMMONLY_USED);
1256 UTimeZoneNameType nameType = UTZNM_UNKNOWN;
1257 switch (style) {
1258 case LONG:
1259 nameType = daylight ? UTZNM_LONG_DAYLIGHT : UTZNM_LONG_STANDARD;
1260 break;
1261 case SHORT:
1262 case SHORT_COMMONLY_USED:
1263 nameType = daylight ? UTZNM_SHORT_DAYLIGHT : UTZNM_SHORT_STANDARD;
1264 break;
1265 default:
1266 U_ASSERT(FALSE);
1267 }
1268 LocalPointer<TimeZoneNames> tznames(TimeZoneNames::createInstance(locale, status));
1269 if (U_FAILURE(status)) {
1270 result.remove();
1271 return result;
1272 }
1273 UnicodeString canonicalID(ZoneMeta::getCanonicalCLDRID(*this));
1274 tznames->getDisplayName(canonicalID, nameType, date, result);
1275 if (result.isEmpty()) {
1276 // Fallback to localized GMT
1277 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1278 offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1279 if (style == LONG) {
1280 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1281 } else {
1282 tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1283 }
1284 }
1285 }
1286 if (U_FAILURE(status)) {
1287 result.remove();
1288 }
1289 return result;
1290 }
1291
1292 /**
1293 * Parse a custom time zone identifier and return a corresponding zone.
1294 * @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
1295 * GMT[+-]hh.
1296 * @return a newly created SimpleTimeZone with the given offset and
1297 * no Daylight Savings Time, or null if the id cannot be parsed.
1298 */
1299 TimeZone*
createCustomTimeZone(const UnicodeString & id)1300 TimeZone::createCustomTimeZone(const UnicodeString& id)
1301 {
1302 int32_t sign, hour, min, sec;
1303 if (parseCustomID(id, sign, hour, min, sec)) {
1304 UnicodeString customID;
1305 formatCustomID(hour, min, sec, (sign < 0), customID);
1306 int32_t offset = sign * ((hour * 60 + min) * 60 + sec) * 1000;
1307 return new SimpleTimeZone(offset, customID);
1308 }
1309 return NULL;
1310 }
1311
1312 UnicodeString&
getCustomID(const UnicodeString & id,UnicodeString & normalized,UErrorCode & status)1313 TimeZone::getCustomID(const UnicodeString& id, UnicodeString& normalized, UErrorCode& status) {
1314 normalized.remove();
1315 if (U_FAILURE(status)) {
1316 return normalized;
1317 }
1318 int32_t sign, hour, min, sec;
1319 if (parseCustomID(id, sign, hour, min, sec)) {
1320 formatCustomID(hour, min, sec, (sign < 0), normalized);
1321 } else {
1322 status = U_ILLEGAL_ARGUMENT_ERROR;
1323 }
1324 return normalized;
1325 }
1326
1327 UBool
parseCustomID(const UnicodeString & id,int32_t & sign,int32_t & hour,int32_t & min,int32_t & sec)1328 TimeZone::parseCustomID(const UnicodeString& id, int32_t& sign,
1329 int32_t& hour, int32_t& min, int32_t& sec) {
1330 static const int32_t kParseFailed = -99999;
1331
1332 NumberFormat* numberFormat = 0;
1333 UnicodeString idUppercase = id;
1334 idUppercase.toUpper("");
1335
1336 if (id.length() > GMT_ID_LENGTH &&
1337 idUppercase.startsWith(GMT_ID, GMT_ID_LENGTH))
1338 {
1339 ParsePosition pos(GMT_ID_LENGTH);
1340 sign = 1;
1341 hour = 0;
1342 min = 0;
1343 sec = 0;
1344
1345 if (id[pos.getIndex()] == MINUS /*'-'*/) {
1346 sign = -1;
1347 } else if (id[pos.getIndex()] != PLUS /*'+'*/) {
1348 return FALSE;
1349 }
1350 pos.setIndex(pos.getIndex() + 1);
1351
1352 UErrorCode success = U_ZERO_ERROR;
1353 numberFormat = NumberFormat::createInstance(success);
1354 if(U_FAILURE(success)){
1355 return FALSE;
1356 }
1357 numberFormat->setParseIntegerOnly(TRUE);
1358 //numberFormat->setLenient(TRUE); // TODO: May need to set this, depends on latest timezone parsing
1359
1360 // Look for either hh:mm, hhmm, or hh
1361 int32_t start = pos.getIndex();
1362 Formattable n(kParseFailed);
1363 numberFormat->parse(id, n, pos);
1364 if (pos.getIndex() == start) {
1365 delete numberFormat;
1366 return FALSE;
1367 }
1368 hour = n.getLong();
1369
1370 if (pos.getIndex() < id.length()) {
1371 if (pos.getIndex() - start > 2
1372 || id[pos.getIndex()] != COLON) {
1373 delete numberFormat;
1374 return FALSE;
1375 }
1376 // hh:mm
1377 pos.setIndex(pos.getIndex() + 1);
1378 int32_t oldPos = pos.getIndex();
1379 n.setLong(kParseFailed);
1380 numberFormat->parse(id, n, pos);
1381 if ((pos.getIndex() - oldPos) != 2) {
1382 // must be 2 digits
1383 delete numberFormat;
1384 return FALSE;
1385 }
1386 min = n.getLong();
1387 if (pos.getIndex() < id.length()) {
1388 if (id[pos.getIndex()] != COLON) {
1389 delete numberFormat;
1390 return FALSE;
1391 }
1392 // [:ss]
1393 pos.setIndex(pos.getIndex() + 1);
1394 oldPos = pos.getIndex();
1395 n.setLong(kParseFailed);
1396 numberFormat->parse(id, n, pos);
1397 if (pos.getIndex() != id.length()
1398 || (pos.getIndex() - oldPos) != 2) {
1399 delete numberFormat;
1400 return FALSE;
1401 }
1402 sec = n.getLong();
1403 }
1404 } else {
1405 // Supported formats are below -
1406 //
1407 // HHmmss
1408 // Hmmss
1409 // HHmm
1410 // Hmm
1411 // HH
1412 // H
1413
1414 int32_t length = pos.getIndex() - start;
1415 if (length <= 0 || 6 < length) {
1416 // invalid length
1417 delete numberFormat;
1418 return FALSE;
1419 }
1420 switch (length) {
1421 case 1:
1422 case 2:
1423 // already set to hour
1424 break;
1425 case 3:
1426 case 4:
1427 min = hour % 100;
1428 hour /= 100;
1429 break;
1430 case 5:
1431 case 6:
1432 sec = hour % 100;
1433 min = (hour/100) % 100;
1434 hour /= 10000;
1435 break;
1436 }
1437 }
1438
1439 delete numberFormat;
1440
1441 if (hour > kMAX_CUSTOM_HOUR || min > kMAX_CUSTOM_MIN || sec > kMAX_CUSTOM_SEC) {
1442 return FALSE;
1443 }
1444 return TRUE;
1445 }
1446 return FALSE;
1447 }
1448
1449 UnicodeString&
formatCustomID(int32_t hour,int32_t min,int32_t sec,UBool negative,UnicodeString & id)1450 TimeZone::formatCustomID(int32_t hour, int32_t min, int32_t sec,
1451 UBool negative, UnicodeString& id) {
1452 // Create time zone ID - GMT[+|-]hhmm[ss]
1453 id.setTo(GMT_ID, GMT_ID_LENGTH);
1454 if (hour | min | sec) {
1455 if (negative) {
1456 id += (UChar)MINUS;
1457 } else {
1458 id += (UChar)PLUS;
1459 }
1460
1461 if (hour < 10) {
1462 id += (UChar)ZERO_DIGIT;
1463 } else {
1464 id += (UChar)(ZERO_DIGIT + hour/10);
1465 }
1466 id += (UChar)(ZERO_DIGIT + hour%10);
1467 id += (UChar)COLON;
1468 if (min < 10) {
1469 id += (UChar)ZERO_DIGIT;
1470 } else {
1471 id += (UChar)(ZERO_DIGIT + min/10);
1472 }
1473 id += (UChar)(ZERO_DIGIT + min%10);
1474
1475 if (sec) {
1476 id += (UChar)COLON;
1477 if (sec < 10) {
1478 id += (UChar)ZERO_DIGIT;
1479 } else {
1480 id += (UChar)(ZERO_DIGIT + sec/10);
1481 }
1482 id += (UChar)(ZERO_DIGIT + sec%10);
1483 }
1484 }
1485 return id;
1486 }
1487
1488
1489 UBool
hasSameRules(const TimeZone & other) const1490 TimeZone::hasSameRules(const TimeZone& other) const
1491 {
1492 return (getRawOffset() == other.getRawOffset() &&
1493 useDaylightTime() == other.useDaylightTime());
1494 }
1495
initTZDataVersion(UErrorCode & status)1496 static void U_CALLCONV initTZDataVersion(UErrorCode &status) {
1497 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
1498 int32_t len = 0;
1499 UResourceBundle *bundle = ures_openDirect(NULL, kZONEINFO, &status);
1500 const UChar *tzver = ures_getStringByKey(bundle, kTZVERSION, &len, &status);
1501
1502 if (U_SUCCESS(status)) {
1503 if (len >= (int32_t)sizeof(TZDATA_VERSION)) {
1504 // Ensure that there is always space for a trailing nul in TZDATA_VERSION
1505 len = sizeof(TZDATA_VERSION) - 1;
1506 }
1507 u_UCharsToChars(tzver, TZDATA_VERSION, len);
1508 }
1509 ures_close(bundle);
1510
1511 }
1512
1513 const char*
getTZDataVersion(UErrorCode & status)1514 TimeZone::getTZDataVersion(UErrorCode& status)
1515 {
1516 umtx_initOnce(gTZDataVersionInitOnce, &initTZDataVersion, status);
1517 return (const char*)TZDATA_VERSION;
1518 }
1519
1520 UnicodeString&
getCanonicalID(const UnicodeString & id,UnicodeString & canonicalID,UErrorCode & status)1521 TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UErrorCode& status)
1522 {
1523 UBool isSystemID = FALSE;
1524 return getCanonicalID(id, canonicalID, isSystemID, status);
1525 }
1526
1527 UnicodeString&
getCanonicalID(const UnicodeString & id,UnicodeString & canonicalID,UBool & isSystemID,UErrorCode & status)1528 TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UBool& isSystemID,
1529 UErrorCode& status)
1530 {
1531 canonicalID.remove();
1532 isSystemID = FALSE;
1533 if (U_FAILURE(status)) {
1534 return canonicalID;
1535 }
1536 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) == 0) {
1537 // special case - Etc/Unknown is a canonical ID, but not system ID
1538 canonicalID.fastCopyFrom(id);
1539 isSystemID = FALSE;
1540 } else {
1541 ZoneMeta::getCanonicalCLDRID(id, canonicalID, status);
1542 if (U_SUCCESS(status)) {
1543 isSystemID = TRUE;
1544 } else {
1545 // Not a system ID
1546 status = U_ZERO_ERROR;
1547 getCustomID(id, canonicalID, status);
1548 }
1549 }
1550 return canonicalID;
1551 }
1552
1553 UnicodeString&
getWindowsID(const UnicodeString & id,UnicodeString & winid,UErrorCode & status)1554 TimeZone::getWindowsID(const UnicodeString& id, UnicodeString& winid, UErrorCode& status) {
1555 winid.remove();
1556 if (U_FAILURE(status)) {
1557 return winid;
1558 }
1559
1560 // canonicalize the input ID
1561 UnicodeString canonicalID;
1562 UBool isSystemID = FALSE;
1563
1564 getCanonicalID(id, canonicalID, isSystemID, status);
1565 if (U_FAILURE(status) || !isSystemID) {
1566 // mapping data is only applicable to tz database IDs
1567 if (status == U_ILLEGAL_ARGUMENT_ERROR) {
1568 // getWindowsID() sets an empty string where
1569 // getCanonicalID() sets a U_ILLEGAL_ARGUMENT_ERROR.
1570 status = U_ZERO_ERROR;
1571 }
1572 return winid;
1573 }
1574
1575 UResourceBundle *mapTimezones = ures_openDirect(NULL, "windowsZones", &status);
1576 ures_getByKey(mapTimezones, "mapTimezones", mapTimezones, &status);
1577
1578 if (U_FAILURE(status)) {
1579 return winid;
1580 }
1581
1582 UResourceBundle *winzone = NULL;
1583 UBool found = FALSE;
1584 while (ures_hasNext(mapTimezones) && !found) {
1585 winzone = ures_getNextResource(mapTimezones, winzone, &status);
1586 if (U_FAILURE(status)) {
1587 break;
1588 }
1589 if (ures_getType(winzone) != URES_TABLE) {
1590 continue;
1591 }
1592 UResourceBundle *regionalData = NULL;
1593 while (ures_hasNext(winzone) && !found) {
1594 regionalData = ures_getNextResource(winzone, regionalData, &status);
1595 if (U_FAILURE(status)) {
1596 break;
1597 }
1598 if (ures_getType(regionalData) != URES_STRING) {
1599 continue;
1600 }
1601 int32_t len;
1602 const UChar *tzids = ures_getString(regionalData, &len, &status);
1603 if (U_FAILURE(status)) {
1604 break;
1605 }
1606
1607 const UChar *start = tzids;
1608 UBool hasNext = TRUE;
1609 while (hasNext) {
1610 const UChar *end = u_strchr(start, (UChar)0x20);
1611 if (end == NULL) {
1612 end = tzids + len;
1613 hasNext = FALSE;
1614 }
1615 if (canonicalID.compare(start, static_cast<int32_t>(end - start)) == 0) {
1616 winid = UnicodeString(ures_getKey(winzone), -1 , US_INV);
1617 found = TRUE;
1618 break;
1619 }
1620 start = end + 1;
1621 }
1622 }
1623 ures_close(regionalData);
1624 }
1625 ures_close(winzone);
1626 ures_close(mapTimezones);
1627
1628 return winid;
1629 }
1630
1631 #define MAX_WINDOWS_ID_SIZE 128
1632
1633 UnicodeString&
getIDForWindowsID(const UnicodeString & winid,const char * region,UnicodeString & id,UErrorCode & status)1634 TimeZone::getIDForWindowsID(const UnicodeString& winid, const char* region, UnicodeString& id, UErrorCode& status) {
1635 id.remove();
1636 if (U_FAILURE(status)) {
1637 return id;
1638 }
1639
1640 UResourceBundle *zones = ures_openDirect(NULL, "windowsZones", &status);
1641 ures_getByKey(zones, "mapTimezones", zones, &status);
1642 if (U_FAILURE(status)) {
1643 ures_close(zones);
1644 return id;
1645 }
1646
1647 UErrorCode tmperr = U_ZERO_ERROR;
1648 char winidKey[MAX_WINDOWS_ID_SIZE];
1649 int32_t winKeyLen = winid.extract(0, winid.length(), winidKey, sizeof(winidKey) - 1, US_INV);
1650
1651 if (winKeyLen == 0 || winKeyLen >= (int32_t)sizeof(winidKey)) {
1652 ures_close(zones);
1653 return id;
1654 }
1655 winidKey[winKeyLen] = 0;
1656
1657 ures_getByKey(zones, winidKey, zones, &tmperr); // use tmperr, because windows mapping might not
1658 // be avaiable by design
1659 if (U_FAILURE(tmperr)) {
1660 ures_close(zones);
1661 return id;
1662 }
1663
1664 const UChar *tzid = NULL;
1665 int32_t len = 0;
1666 UBool gotID = FALSE;
1667 if (region) {
1668 const UChar *tzids = ures_getStringByKey(zones, region, &len, &tmperr); // use tmperr, because
1669 // regional mapping is optional
1670 if (U_SUCCESS(tmperr)) {
1671 // first ID delimited by space is the defasult one
1672 const UChar *end = u_strchr(tzids, (UChar)0x20);
1673 if (end == NULL) {
1674 id.setTo(tzids, -1);
1675 } else {
1676 id.setTo(tzids, static_cast<int32_t>(end - tzids));
1677 }
1678 gotID = TRUE;
1679 }
1680 }
1681
1682 if (!gotID) {
1683 tzid = ures_getStringByKey(zones, "001", &len, &status); // using status, because "001" must be
1684 // available at this point
1685 if (U_SUCCESS(status)) {
1686 id.setTo(tzid, len);
1687 }
1688 }
1689
1690 ures_close(zones);
1691 return id;
1692 }
1693
1694
1695 U_NAMESPACE_END
1696
1697 #endif /* #if !UCONFIG_NO_FORMATTING */
1698
1699 //eof
1700