1 // Copyright (C) 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)742 UBool getID(int32_t i) {
743 UErrorCode ec = U_ZERO_ERROR;
744 int32_t idLen = 0;
745 const UChar* id = NULL;
746 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
747 top = ures_getByKey(top, kNAMES, top, &ec); // dereference Zones section
748 id = ures_getStringByIndex(top, i, &idLen, &ec);
749 if(U_FAILURE(ec)) {
750 unistr.truncate(0);
751 }
752 else {
753 unistr.fastCopyFrom(UnicodeString(TRUE, id, idLen));
754 }
755 ures_close(top);
756 return U_SUCCESS(ec);
757 }
758
getMap(USystemTimeZoneType type,int32_t & len,UErrorCode & ec)759 static int32_t* getMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) {
760 len = 0;
761 if (U_FAILURE(ec)) {
762 return NULL;
763 }
764 int32_t* m = NULL;
765 switch (type) {
766 case UCAL_ZONE_TYPE_ANY:
767 umtx_initOnce(gSystemZonesInitOnce, &initMap, type, ec);
768 m = MAP_SYSTEM_ZONES;
769 len = LEN_SYSTEM_ZONES;
770 break;
771 case UCAL_ZONE_TYPE_CANONICAL:
772 umtx_initOnce(gCanonicalZonesInitOnce, &initMap, type, ec);
773 m = MAP_CANONICAL_SYSTEM_ZONES;
774 len = LEN_CANONICAL_SYSTEM_ZONES;
775 break;
776 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
777 umtx_initOnce(gCanonicalLocationZonesInitOnce, &initMap, type, ec);
778 m = MAP_CANONICAL_SYSTEM_LOCATION_ZONES;
779 len = LEN_CANONICAL_SYSTEM_LOCATION_ZONES;
780 break;
781 default:
782 ec = U_ILLEGAL_ARGUMENT_ERROR;
783 m = NULL;
784 len = 0;
785 break;
786 }
787 return m;
788 }
789
790 public:
791
792 #define DEFAULT_FILTERED_MAP_SIZE 8
793 #define MAP_INCREMENT_SIZE 8
794
create(USystemTimeZoneType type,const char * region,const int32_t * rawOffset,UErrorCode & ec)795 static TZEnumeration* create(USystemTimeZoneType type, const char* region, const int32_t* rawOffset, UErrorCode& ec) {
796 if (U_FAILURE(ec)) {
797 return NULL;
798 }
799
800 int32_t baseLen;
801 int32_t *baseMap = getMap(type, baseLen, ec);
802
803 if (U_FAILURE(ec)) {
804 return NULL;
805 }
806
807 // If any additional conditions are available,
808 // create instance local map filtered by the conditions.
809
810 int32_t *filteredMap = NULL;
811 int32_t numEntries = 0;
812
813 if (region != NULL || rawOffset != NULL) {
814 int32_t filteredMapSize = DEFAULT_FILTERED_MAP_SIZE;
815 filteredMap = (int32_t *)uprv_malloc(filteredMapSize * sizeof(int32_t));
816 if (filteredMap == NULL) {
817 ec = U_MEMORY_ALLOCATION_ERROR;
818 return NULL;
819 }
820
821 // Walk through the base map
822 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
823 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
824 for (int32_t i = 0; i < baseLen; i++) {
825 int32_t zidx = baseMap[i];
826 UnicodeString id = ures_getUnicodeStringByIndex(res, zidx, &ec);
827 if (U_FAILURE(ec)) {
828 break;
829 }
830 if (region != NULL) {
831 // Filter by region
832 char tzregion[4]; // max 3 letters + null term
833 TimeZone::getRegion(id, tzregion, sizeof(tzregion), ec);
834 if (U_FAILURE(ec)) {
835 break;
836 }
837 if (uprv_stricmp(tzregion, region) != 0) {
838 // region does not match
839 continue;
840 }
841 }
842 if (rawOffset != NULL) {
843 // Filter by raw offset
844 // Note: This is VERY inefficient
845 TimeZone *z = createSystemTimeZone(id, ec);
846 if (U_FAILURE(ec)) {
847 break;
848 }
849 int32_t tzoffset = z->getRawOffset();
850 delete z;
851
852 if (tzoffset != *rawOffset) {
853 continue;
854 }
855 }
856
857 if (filteredMapSize <= numEntries) {
858 filteredMapSize += MAP_INCREMENT_SIZE;
859 int32_t *tmp = (int32_t *)uprv_realloc(filteredMap, filteredMapSize * sizeof(int32_t));
860 if (tmp == NULL) {
861 ec = U_MEMORY_ALLOCATION_ERROR;
862 break;
863 } else {
864 filteredMap = tmp;
865 }
866 }
867
868 filteredMap[numEntries++] = zidx;
869 }
870
871 if (U_FAILURE(ec)) {
872 uprv_free(filteredMap);
873 filteredMap = NULL;
874 }
875
876 ures_close(res);
877 }
878
879 TZEnumeration *result = NULL;
880 if (U_SUCCESS(ec)) {
881 // Finally, create a new enumeration instance
882 if (filteredMap == NULL) {
883 result = new TZEnumeration(baseMap, baseLen, FALSE);
884 } else {
885 result = new TZEnumeration(filteredMap, numEntries, TRUE);
886 filteredMap = NULL;
887 }
888 if (result == NULL) {
889 ec = U_MEMORY_ALLOCATION_ERROR;
890 }
891 }
892
893 if (filteredMap != NULL) {
894 uprv_free(filteredMap);
895 }
896
897 return result;
898 }
899
TZEnumeration(const TZEnumeration & other)900 TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(NULL), localMap(NULL), len(0), pos(0) {
901 if (other.localMap != NULL) {
902 localMap = (int32_t *)uprv_malloc(other.len * sizeof(int32_t));
903 if (localMap != NULL) {
904 len = other.len;
905 uprv_memcpy(localMap, other.localMap, len * sizeof(int32_t));
906 pos = other.pos;
907 map = localMap;
908 } else {
909 len = 0;
910 pos = 0;
911 map = NULL;
912 }
913 } else {
914 map = other.map;
915 localMap = NULL;
916 len = other.len;
917 pos = other.pos;
918 }
919 }
920
921 virtual ~TZEnumeration();
922
clone() const923 virtual StringEnumeration *clone() const {
924 return new TZEnumeration(*this);
925 }
926
count(UErrorCode & status) const927 virtual int32_t count(UErrorCode& status) const {
928 return U_FAILURE(status) ? 0 : len;
929 }
930
snext(UErrorCode & status)931 virtual const UnicodeString* snext(UErrorCode& status) {
932 if (U_SUCCESS(status) && map != NULL && pos < len) {
933 getID(map[pos]);
934 ++pos;
935 return &unistr;
936 }
937 return 0;
938 }
939
reset(UErrorCode &)940 virtual void reset(UErrorCode& /*status*/) {
941 pos = 0;
942 }
943
944 public:
945 static UClassID U_EXPORT2 getStaticClassID(void);
946 virtual UClassID getDynamicClassID(void) const;
947 };
948
~TZEnumeration()949 TZEnumeration::~TZEnumeration() {
950 if (localMap != NULL) {
951 uprv_free(localMap);
952 }
953 }
954
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)955 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)
956
957 StringEnumeration* U_EXPORT2
958 TimeZone::createTimeZoneIDEnumeration(
959 USystemTimeZoneType zoneType,
960 const char* region,
961 const int32_t* rawOffset,
962 UErrorCode& ec) {
963 return TZEnumeration::create(zoneType, region, rawOffset, ec);
964 }
965
966 StringEnumeration* U_EXPORT2
createEnumeration()967 TimeZone::createEnumeration() {
968 UErrorCode ec = U_ZERO_ERROR;
969 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, NULL, ec);
970 }
971
972 StringEnumeration* U_EXPORT2
createEnumeration(int32_t rawOffset)973 TimeZone::createEnumeration(int32_t rawOffset) {
974 UErrorCode ec = U_ZERO_ERROR;
975 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, &rawOffset, ec);
976 }
977
978 StringEnumeration* U_EXPORT2
createEnumeration(const char * country)979 TimeZone::createEnumeration(const char* country) {
980 UErrorCode ec = U_ZERO_ERROR;
981 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, country, NULL, ec);
982 }
983
984 // ---------------------------------------
985
986 int32_t U_EXPORT2
countEquivalentIDs(const UnicodeString & id)987 TimeZone::countEquivalentIDs(const UnicodeString& id) {
988 int32_t result = 0;
989 UErrorCode ec = U_ZERO_ERROR;
990 UResourceBundle res;
991 ures_initStackObject(&res);
992 U_DEBUG_TZ_MSG(("countEquivalentIDs..\n"));
993 UResourceBundle *top = openOlsonResource(id, res, ec);
994 if (U_SUCCESS(ec)) {
995 UResourceBundle r;
996 ures_initStackObject(&r);
997 ures_getByKey(&res, kLINKS, &r, &ec);
998 ures_getIntVector(&r, &result, &ec);
999 ures_close(&r);
1000 }
1001 ures_close(&res);
1002 ures_close(top);
1003 return result;
1004 }
1005
1006 // ---------------------------------------
1007
1008 const UnicodeString U_EXPORT2
getEquivalentID(const UnicodeString & id,int32_t index)1009 TimeZone::getEquivalentID(const UnicodeString& id, int32_t index) {
1010 U_DEBUG_TZ_MSG(("gEI(%d)\n", index));
1011 UnicodeString result;
1012 UErrorCode ec = U_ZERO_ERROR;
1013 UResourceBundle res;
1014 ures_initStackObject(&res);
1015 UResourceBundle *top = openOlsonResource(id, res, ec);
1016 int32_t zone = -1;
1017 if (U_SUCCESS(ec)) {
1018 UResourceBundle r;
1019 ures_initStackObject(&r);
1020 int32_t size;
1021 ures_getByKey(&res, kLINKS, &r, &ec);
1022 const int32_t* v = ures_getIntVector(&r, &size, &ec);
1023 if (U_SUCCESS(ec)) {
1024 if (index >= 0 && index < size) {
1025 zone = v[index];
1026 }
1027 }
1028 ures_close(&r);
1029 }
1030 ures_close(&res);
1031 if (zone >= 0) {
1032 UResourceBundle *ares = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Zones section
1033 if (U_SUCCESS(ec)) {
1034 int32_t idLen = 0;
1035 const UChar* id = ures_getStringByIndex(ares, zone, &idLen, &ec);
1036 result.fastCopyFrom(UnicodeString(TRUE, id, idLen));
1037 U_DEBUG_TZ_MSG(("gei(%d) -> %d, len%d, %s\n", index, zone, result.length(), u_errorName(ec)));
1038 }
1039 ures_close(ares);
1040 }
1041 ures_close(top);
1042 #if defined(U_DEBUG_TZ)
1043 if(result.length() ==0) {
1044 U_DEBUG_TZ_MSG(("equiv [__, #%d] -> 0 (%s)\n", index, u_errorName(ec)));
1045 }
1046 #endif
1047 return result;
1048 }
1049
1050 // ---------------------------------------
1051
1052 // These methods are used by ZoneMeta class only.
1053
1054 const UChar*
findID(const UnicodeString & id)1055 TimeZone::findID(const UnicodeString& id) {
1056 const UChar *result = NULL;
1057 UErrorCode ec = U_ZERO_ERROR;
1058 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1059
1060 // resolve zone index by name
1061 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1062 int32_t idx = findInStringArray(names, id, ec);
1063 result = ures_getStringByIndex(names, idx, NULL, &ec);
1064 if (U_FAILURE(ec)) {
1065 result = NULL;
1066 }
1067 ures_close(names);
1068 ures_close(rb);
1069 return result;
1070 }
1071
1072
1073 const UChar*
dereferOlsonLink(const UnicodeString & id)1074 TimeZone::dereferOlsonLink(const UnicodeString& id) {
1075 const UChar *result = NULL;
1076 UErrorCode ec = U_ZERO_ERROR;
1077 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1078
1079 // resolve zone index by name
1080 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1081 int32_t idx = findInStringArray(names, id, ec);
1082 result = ures_getStringByIndex(names, idx, NULL, &ec);
1083
1084 // open the zone bundle by index
1085 ures_getByKey(rb, kZONES, rb, &ec);
1086 ures_getByIndex(rb, idx, rb, &ec);
1087
1088 if (U_SUCCESS(ec)) {
1089 if (ures_getType(rb) == URES_INT) {
1090 // this is a link - dereference the link
1091 int32_t deref = ures_getInt(rb, &ec);
1092 const UChar* tmp = ures_getStringByIndex(names, deref, NULL, &ec);
1093 if (U_SUCCESS(ec)) {
1094 result = tmp;
1095 }
1096 }
1097 }
1098
1099 ures_close(names);
1100 ures_close(rb);
1101
1102 return result;
1103 }
1104
1105 const UChar*
getRegion(const UnicodeString & id)1106 TimeZone::getRegion(const UnicodeString& id) {
1107 UErrorCode status = U_ZERO_ERROR;
1108 return getRegion(id, status);
1109 }
1110
1111 const UChar*
getRegion(const UnicodeString & id,UErrorCode & status)1112 TimeZone::getRegion(const UnicodeString& id, UErrorCode& status) {
1113 if (U_FAILURE(status)) {
1114 return NULL;
1115 }
1116 const UChar *result = NULL;
1117 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &status);
1118
1119 // resolve zone index by name
1120 UResourceBundle *res = ures_getByKey(rb, kNAMES, NULL, &status);
1121 int32_t idx = findInStringArray(res, id, status);
1122
1123 // get region mapping
1124 ures_getByKey(rb, kREGIONS, res, &status);
1125 const UChar *tmp = ures_getStringByIndex(res, idx, NULL, &status);
1126 if (U_SUCCESS(status)) {
1127 result = tmp;
1128 }
1129
1130 ures_close(res);
1131 ures_close(rb);
1132
1133 return result;
1134 }
1135
1136
1137 // ---------------------------------------
1138 int32_t
getRegion(const UnicodeString & id,char * region,int32_t capacity,UErrorCode & status)1139 TimeZone::getRegion(const UnicodeString& id, char *region, int32_t capacity, UErrorCode& status)
1140 {
1141 int32_t resultLen = 0;
1142 *region = 0;
1143 if (U_FAILURE(status)) {
1144 return 0;
1145 }
1146
1147 const UChar *uregion = NULL;
1148 // "Etc/Unknown" is not a system zone ID,
1149 // but in the zone data
1150 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) != 0) {
1151 uregion = getRegion(id);
1152 }
1153 if (uregion == NULL) {
1154 status = U_ILLEGAL_ARGUMENT_ERROR;
1155 return 0;
1156 }
1157 resultLen = u_strlen(uregion);
1158 // A region code is represented by invariant characters
1159 u_UCharsToChars(uregion, region, uprv_min(resultLen, capacity));
1160
1161 if (capacity < resultLen) {
1162 status = U_BUFFER_OVERFLOW_ERROR;
1163 return resultLen;
1164 }
1165
1166 return u_terminateChars(region, capacity, resultLen, &status);
1167 }
1168
1169 // ---------------------------------------
1170
1171
1172 UnicodeString&
getDisplayName(UnicodeString & result) const1173 TimeZone::getDisplayName(UnicodeString& result) const
1174 {
1175 return getDisplayName(FALSE,LONG,Locale::getDefault(), result);
1176 }
1177
1178 UnicodeString&
getDisplayName(const Locale & locale,UnicodeString & result) const1179 TimeZone::getDisplayName(const Locale& locale, UnicodeString& result) const
1180 {
1181 return getDisplayName(FALSE, LONG, locale, result);
1182 }
1183
1184 UnicodeString&
getDisplayName(UBool daylight,EDisplayType style,UnicodeString & result) const1185 TimeZone::getDisplayName(UBool daylight, EDisplayType style, UnicodeString& result) const
1186 {
1187 return getDisplayName(daylight,style, Locale::getDefault(), result);
1188 }
1189 //--------------------------------------
1190 int32_t
getDSTSavings() const1191 TimeZone::getDSTSavings()const {
1192 if (useDaylightTime()) {
1193 return 3600000;
1194 }
1195 return 0;
1196 }
1197 //---------------------------------------
1198 UnicodeString&
getDisplayName(UBool daylight,EDisplayType style,const Locale & locale,UnicodeString & result) const1199 TimeZone::getDisplayName(UBool daylight, EDisplayType style, const Locale& locale, UnicodeString& result) const
1200 {
1201 UErrorCode status = U_ZERO_ERROR;
1202 UDate date = Calendar::getNow();
1203 UTimeZoneFormatTimeType timeType;
1204 int32_t offset;
1205
1206 if (style == GENERIC_LOCATION || style == LONG_GENERIC || style == SHORT_GENERIC) {
1207 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1208 if (U_FAILURE(status)) {
1209 result.remove();
1210 return result;
1211 }
1212 // Generic format
1213 switch (style) {
1214 case GENERIC_LOCATION:
1215 tzfmt->format(UTZFMT_STYLE_GENERIC_LOCATION, *this, date, result, &timeType);
1216 break;
1217 case LONG_GENERIC:
1218 tzfmt->format(UTZFMT_STYLE_GENERIC_LONG, *this, date, result, &timeType);
1219 break;
1220 case SHORT_GENERIC:
1221 tzfmt->format(UTZFMT_STYLE_GENERIC_SHORT, *this, date, result, &timeType);
1222 break;
1223 default:
1224 U_ASSERT(FALSE);
1225 }
1226 // Generic format many use Localized GMT as the final fallback.
1227 // When Localized GMT format is used, the result might not be
1228 // appropriate for the requested daylight value.
1229 if ((daylight && timeType == UTZFMT_TIME_TYPE_STANDARD) || (!daylight && timeType == UTZFMT_TIME_TYPE_DAYLIGHT)) {
1230 offset = daylight ? getRawOffset() + getDSTSavings() : getRawOffset();
1231 if (style == SHORT_GENERIC) {
1232 tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1233 } else {
1234 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1235 }
1236 }
1237 } else if (style == LONG_GMT || style == SHORT_GMT) {
1238 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1239 if (U_FAILURE(status)) {
1240 result.remove();
1241 return result;
1242 }
1243 offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1244 switch (style) {
1245 case LONG_GMT:
1246 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1247 break;
1248 case SHORT_GMT:
1249 tzfmt->formatOffsetISO8601Basic(offset, FALSE, FALSE, FALSE, result, status);
1250 break;
1251 default:
1252 U_ASSERT(FALSE);
1253 }
1254
1255 } else {
1256 U_ASSERT(style == LONG || style == SHORT || style == SHORT_COMMONLY_USED);
1257 UTimeZoneNameType nameType = UTZNM_UNKNOWN;
1258 switch (style) {
1259 case LONG:
1260 nameType = daylight ? UTZNM_LONG_DAYLIGHT : UTZNM_LONG_STANDARD;
1261 break;
1262 case SHORT:
1263 case SHORT_COMMONLY_USED:
1264 nameType = daylight ? UTZNM_SHORT_DAYLIGHT : UTZNM_SHORT_STANDARD;
1265 break;
1266 default:
1267 U_ASSERT(FALSE);
1268 }
1269 LocalPointer<TimeZoneNames> tznames(TimeZoneNames::createInstance(locale, status));
1270 if (U_FAILURE(status)) {
1271 result.remove();
1272 return result;
1273 }
1274 UnicodeString canonicalID(ZoneMeta::getCanonicalCLDRID(*this));
1275 tznames->getDisplayName(canonicalID, nameType, date, result);
1276 if (result.isEmpty()) {
1277 // Fallback to localized GMT
1278 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1279 offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1280 if (style == LONG) {
1281 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1282 } else {
1283 tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1284 }
1285 }
1286 }
1287 if (U_FAILURE(status)) {
1288 result.remove();
1289 }
1290 return result;
1291 }
1292
1293 /**
1294 * Parse a custom time zone identifier and return a corresponding zone.
1295 * @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
1296 * GMT[+-]hh.
1297 * @return a newly created SimpleTimeZone with the given offset and
1298 * no Daylight Savings Time, or null if the id cannot be parsed.
1299 */
1300 TimeZone*
createCustomTimeZone(const UnicodeString & id)1301 TimeZone::createCustomTimeZone(const UnicodeString& id)
1302 {
1303 int32_t sign, hour, min, sec;
1304 if (parseCustomID(id, sign, hour, min, sec)) {
1305 UnicodeString customID;
1306 formatCustomID(hour, min, sec, (sign < 0), customID);
1307 int32_t offset = sign * ((hour * 60 + min) * 60 + sec) * 1000;
1308 return new SimpleTimeZone(offset, customID);
1309 }
1310 return NULL;
1311 }
1312
1313 UnicodeString&
getCustomID(const UnicodeString & id,UnicodeString & normalized,UErrorCode & status)1314 TimeZone::getCustomID(const UnicodeString& id, UnicodeString& normalized, UErrorCode& status) {
1315 normalized.remove();
1316 if (U_FAILURE(status)) {
1317 return normalized;
1318 }
1319 int32_t sign, hour, min, sec;
1320 if (parseCustomID(id, sign, hour, min, sec)) {
1321 formatCustomID(hour, min, sec, (sign < 0), normalized);
1322 } else {
1323 status = U_ILLEGAL_ARGUMENT_ERROR;
1324 }
1325 return normalized;
1326 }
1327
1328 UBool
parseCustomID(const UnicodeString & id,int32_t & sign,int32_t & hour,int32_t & min,int32_t & sec)1329 TimeZone::parseCustomID(const UnicodeString& id, int32_t& sign,
1330 int32_t& hour, int32_t& min, int32_t& sec) {
1331 static const int32_t kParseFailed = -99999;
1332
1333 NumberFormat* numberFormat = 0;
1334 UnicodeString idUppercase = id;
1335 idUppercase.toUpper("");
1336
1337 if (id.length() > GMT_ID_LENGTH &&
1338 idUppercase.startsWith(GMT_ID, GMT_ID_LENGTH))
1339 {
1340 ParsePosition pos(GMT_ID_LENGTH);
1341 sign = 1;
1342 hour = 0;
1343 min = 0;
1344 sec = 0;
1345
1346 if (id[pos.getIndex()] == MINUS /*'-'*/) {
1347 sign = -1;
1348 } else if (id[pos.getIndex()] != PLUS /*'+'*/) {
1349 return FALSE;
1350 }
1351 pos.setIndex(pos.getIndex() + 1);
1352
1353 UErrorCode success = U_ZERO_ERROR;
1354 numberFormat = NumberFormat::createInstance(success);
1355 if(U_FAILURE(success)){
1356 return FALSE;
1357 }
1358 numberFormat->setParseIntegerOnly(TRUE);
1359 //numberFormat->setLenient(TRUE); // TODO: May need to set this, depends on latest timezone parsing
1360
1361 // Look for either hh:mm, hhmm, or hh
1362 int32_t start = pos.getIndex();
1363 Formattable n(kParseFailed);
1364 numberFormat->parse(id, n, pos);
1365 if (pos.getIndex() == start) {
1366 delete numberFormat;
1367 return FALSE;
1368 }
1369 hour = n.getLong();
1370
1371 if (pos.getIndex() < id.length()) {
1372 if (pos.getIndex() - start > 2
1373 || id[pos.getIndex()] != COLON) {
1374 delete numberFormat;
1375 return FALSE;
1376 }
1377 // hh:mm
1378 pos.setIndex(pos.getIndex() + 1);
1379 int32_t oldPos = pos.getIndex();
1380 n.setLong(kParseFailed);
1381 numberFormat->parse(id, n, pos);
1382 if ((pos.getIndex() - oldPos) != 2) {
1383 // must be 2 digits
1384 delete numberFormat;
1385 return FALSE;
1386 }
1387 min = n.getLong();
1388 if (pos.getIndex() < id.length()) {
1389 if (id[pos.getIndex()] != COLON) {
1390 delete numberFormat;
1391 return FALSE;
1392 }
1393 // [:ss]
1394 pos.setIndex(pos.getIndex() + 1);
1395 oldPos = pos.getIndex();
1396 n.setLong(kParseFailed);
1397 numberFormat->parse(id, n, pos);
1398 if (pos.getIndex() != id.length()
1399 || (pos.getIndex() - oldPos) != 2) {
1400 delete numberFormat;
1401 return FALSE;
1402 }
1403 sec = n.getLong();
1404 }
1405 } else {
1406 // Supported formats are below -
1407 //
1408 // HHmmss
1409 // Hmmss
1410 // HHmm
1411 // Hmm
1412 // HH
1413 // H
1414
1415 int32_t length = pos.getIndex() - start;
1416 if (length <= 0 || 6 < length) {
1417 // invalid length
1418 delete numberFormat;
1419 return FALSE;
1420 }
1421 switch (length) {
1422 case 1:
1423 case 2:
1424 // already set to hour
1425 break;
1426 case 3:
1427 case 4:
1428 min = hour % 100;
1429 hour /= 100;
1430 break;
1431 case 5:
1432 case 6:
1433 sec = hour % 100;
1434 min = (hour/100) % 100;
1435 hour /= 10000;
1436 break;
1437 }
1438 }
1439
1440 delete numberFormat;
1441
1442 if (hour > kMAX_CUSTOM_HOUR || min > kMAX_CUSTOM_MIN || sec > kMAX_CUSTOM_SEC) {
1443 return FALSE;
1444 }
1445 return TRUE;
1446 }
1447 return FALSE;
1448 }
1449
1450 UnicodeString&
formatCustomID(int32_t hour,int32_t min,int32_t sec,UBool negative,UnicodeString & id)1451 TimeZone::formatCustomID(int32_t hour, int32_t min, int32_t sec,
1452 UBool negative, UnicodeString& id) {
1453 // Create time zone ID - GMT[+|-]hhmm[ss]
1454 id.setTo(GMT_ID, GMT_ID_LENGTH);
1455 if (hour | min | sec) {
1456 if (negative) {
1457 id += (UChar)MINUS;
1458 } else {
1459 id += (UChar)PLUS;
1460 }
1461
1462 if (hour < 10) {
1463 id += (UChar)ZERO_DIGIT;
1464 } else {
1465 id += (UChar)(ZERO_DIGIT + hour/10);
1466 }
1467 id += (UChar)(ZERO_DIGIT + hour%10);
1468 id += (UChar)COLON;
1469 if (min < 10) {
1470 id += (UChar)ZERO_DIGIT;
1471 } else {
1472 id += (UChar)(ZERO_DIGIT + min/10);
1473 }
1474 id += (UChar)(ZERO_DIGIT + min%10);
1475
1476 if (sec) {
1477 id += (UChar)COLON;
1478 if (sec < 10) {
1479 id += (UChar)ZERO_DIGIT;
1480 } else {
1481 id += (UChar)(ZERO_DIGIT + sec/10);
1482 }
1483 id += (UChar)(ZERO_DIGIT + sec%10);
1484 }
1485 }
1486 return id;
1487 }
1488
1489
1490 UBool
hasSameRules(const TimeZone & other) const1491 TimeZone::hasSameRules(const TimeZone& other) const
1492 {
1493 return (getRawOffset() == other.getRawOffset() &&
1494 useDaylightTime() == other.useDaylightTime());
1495 }
1496
initTZDataVersion(UErrorCode & status)1497 static void U_CALLCONV initTZDataVersion(UErrorCode &status) {
1498 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
1499 int32_t len = 0;
1500 UResourceBundle *bundle = ures_openDirect(NULL, kZONEINFO, &status);
1501 const UChar *tzver = ures_getStringByKey(bundle, kTZVERSION, &len, &status);
1502
1503 if (U_SUCCESS(status)) {
1504 if (len >= (int32_t)sizeof(TZDATA_VERSION)) {
1505 // Ensure that there is always space for a trailing nul in TZDATA_VERSION
1506 len = sizeof(TZDATA_VERSION) - 1;
1507 }
1508 u_UCharsToChars(tzver, TZDATA_VERSION, len);
1509 }
1510 ures_close(bundle);
1511
1512 }
1513
1514 const char*
getTZDataVersion(UErrorCode & status)1515 TimeZone::getTZDataVersion(UErrorCode& status)
1516 {
1517 umtx_initOnce(gTZDataVersionInitOnce, &initTZDataVersion, status);
1518 return (const char*)TZDATA_VERSION;
1519 }
1520
1521 UnicodeString&
getCanonicalID(const UnicodeString & id,UnicodeString & canonicalID,UErrorCode & status)1522 TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UErrorCode& status)
1523 {
1524 UBool isSystemID = FALSE;
1525 return getCanonicalID(id, canonicalID, isSystemID, status);
1526 }
1527
1528 UnicodeString&
getCanonicalID(const UnicodeString & id,UnicodeString & canonicalID,UBool & isSystemID,UErrorCode & status)1529 TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UBool& isSystemID,
1530 UErrorCode& status)
1531 {
1532 canonicalID.remove();
1533 isSystemID = FALSE;
1534 if (U_FAILURE(status)) {
1535 return canonicalID;
1536 }
1537 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) == 0) {
1538 // special case - Etc/Unknown is a canonical ID, but not system ID
1539 canonicalID.fastCopyFrom(id);
1540 isSystemID = FALSE;
1541 } else {
1542 ZoneMeta::getCanonicalCLDRID(id, canonicalID, status);
1543 if (U_SUCCESS(status)) {
1544 isSystemID = TRUE;
1545 } else {
1546 // Not a system ID
1547 status = U_ZERO_ERROR;
1548 getCustomID(id, canonicalID, status);
1549 }
1550 }
1551 return canonicalID;
1552 }
1553
1554 UnicodeString&
getWindowsID(const UnicodeString & id,UnicodeString & winid,UErrorCode & status)1555 TimeZone::getWindowsID(const UnicodeString& id, UnicodeString& winid, UErrorCode& status) {
1556 winid.remove();
1557 if (U_FAILURE(status)) {
1558 return winid;
1559 }
1560
1561 // canonicalize the input ID
1562 UnicodeString canonicalID;
1563 UBool isSystemID = FALSE;
1564
1565 getCanonicalID(id, canonicalID, isSystemID, status);
1566 if (U_FAILURE(status) || !isSystemID) {
1567 // mapping data is only applicable to tz database IDs
1568 if (status == U_ILLEGAL_ARGUMENT_ERROR) {
1569 // getWindowsID() sets an empty string where
1570 // getCanonicalID() sets a U_ILLEGAL_ARGUMENT_ERROR.
1571 status = U_ZERO_ERROR;
1572 }
1573 return winid;
1574 }
1575
1576 UResourceBundle *mapTimezones = ures_openDirect(NULL, "windowsZones", &status);
1577 ures_getByKey(mapTimezones, "mapTimezones", mapTimezones, &status);
1578
1579 if (U_FAILURE(status)) {
1580 return winid;
1581 }
1582
1583 UResourceBundle *winzone = NULL;
1584 UBool found = FALSE;
1585 while (ures_hasNext(mapTimezones) && !found) {
1586 winzone = ures_getNextResource(mapTimezones, winzone, &status);
1587 if (U_FAILURE(status)) {
1588 break;
1589 }
1590 if (ures_getType(winzone) != URES_TABLE) {
1591 continue;
1592 }
1593 UResourceBundle *regionalData = NULL;
1594 while (ures_hasNext(winzone) && !found) {
1595 regionalData = ures_getNextResource(winzone, regionalData, &status);
1596 if (U_FAILURE(status)) {
1597 break;
1598 }
1599 if (ures_getType(regionalData) != URES_STRING) {
1600 continue;
1601 }
1602 int32_t len;
1603 const UChar *tzids = ures_getString(regionalData, &len, &status);
1604 if (U_FAILURE(status)) {
1605 break;
1606 }
1607
1608 const UChar *start = tzids;
1609 UBool hasNext = TRUE;
1610 while (hasNext) {
1611 const UChar *end = u_strchr(start, (UChar)0x20);
1612 if (end == NULL) {
1613 end = tzids + len;
1614 hasNext = FALSE;
1615 }
1616 if (canonicalID.compare(start, end - start) == 0) {
1617 winid = UnicodeString(ures_getKey(winzone), -1 , US_INV);
1618 found = TRUE;
1619 break;
1620 }
1621 start = end + 1;
1622 }
1623 }
1624 ures_close(regionalData);
1625 }
1626 ures_close(winzone);
1627 ures_close(mapTimezones);
1628
1629 return winid;
1630 }
1631
1632 #define MAX_WINDOWS_ID_SIZE 128
1633
1634 UnicodeString&
getIDForWindowsID(const UnicodeString & winid,const char * region,UnicodeString & id,UErrorCode & status)1635 TimeZone::getIDForWindowsID(const UnicodeString& winid, const char* region, UnicodeString& id, UErrorCode& status) {
1636 id.remove();
1637 if (U_FAILURE(status)) {
1638 return id;
1639 }
1640
1641 UResourceBundle *zones = ures_openDirect(NULL, "windowsZones", &status);
1642 ures_getByKey(zones, "mapTimezones", zones, &status);
1643 if (U_FAILURE(status)) {
1644 ures_close(zones);
1645 return id;
1646 }
1647
1648 UErrorCode tmperr = U_ZERO_ERROR;
1649 char winidKey[MAX_WINDOWS_ID_SIZE];
1650 int32_t winKeyLen = winid.extract(0, winid.length(), winidKey, sizeof(winidKey) - 1, US_INV);
1651
1652 if (winKeyLen == 0 || winKeyLen >= (int32_t)sizeof(winidKey)) {
1653 ures_close(zones);
1654 return id;
1655 }
1656 winidKey[winKeyLen] = 0;
1657
1658 ures_getByKey(zones, winidKey, zones, &tmperr); // use tmperr, because windows mapping might not
1659 // be avaiable by design
1660 if (U_FAILURE(tmperr)) {
1661 ures_close(zones);
1662 return id;
1663 }
1664
1665 const UChar *tzid = NULL;
1666 int32_t len = 0;
1667 UBool gotID = FALSE;
1668 if (region) {
1669 const UChar *tzids = ures_getStringByKey(zones, region, &len, &tmperr); // use tmperr, because
1670 // regional mapping is optional
1671 if (U_SUCCESS(tmperr)) {
1672 // first ID delimited by space is the defasult one
1673 const UChar *end = u_strchr(tzids, (UChar)0x20);
1674 if (end == NULL) {
1675 id.setTo(tzids, -1);
1676 } else {
1677 id.setTo(tzids, end - tzids);
1678 }
1679 gotID = TRUE;
1680 }
1681 }
1682
1683 if (!gotID) {
1684 tzid = ures_getStringByKey(zones, "001", &len, &status); // using status, because "001" must be
1685 // available at this point
1686 if (U_SUCCESS(status)) {
1687 id.setTo(tzid, len);
1688 }
1689 }
1690
1691 ures_close(zones);
1692 return id;
1693 }
1694
1695
1696 U_NAMESPACE_END
1697
1698 #endif /* #if !UCONFIG_NO_FORMATTING */
1699
1700 //eof
1701