1 /*
2 *******************************************************************************
3 * Copyright (C) 1997-2012, International Business Machines Corporation and *
4 * others. All Rights Reserved. *
5 *******************************************************************************
6 *
7 * File TIMEZONE.CPP
8 *
9 * Modification History:
10 *
11 * Date Name Description
12 * 12/05/96 clhuang Creation.
13 * 04/21/97 aliu General clean-up and bug fixing.
14 * 05/08/97 aliu Fixed Hashtable code per code review.
15 * 07/09/97 helena Changed createInstance to createDefault.
16 * 07/29/97 aliu Updated with all-new list of 96 UNIX-derived
17 * TimeZones. Changed mechanism to load from static
18 * array rather than resource bundle.
19 * 07/07/1998 srl Bugfixes from the Java side: UTC GMT CAT NST
20 * Added getDisplayName API
21 * going to add custom parsing.
22 *
23 * ISSUES:
24 * - should getDisplayName cache something?
25 * - should custom time zones be cached? [probably]
26 * 08/10/98 stephen Brought getDisplayName() API in-line w/ conventions
27 * 08/19/98 stephen Changed createTimeZone() to never return 0
28 * 09/02/98 stephen Added getOffset(monthLen) and hasSameRules()
29 * 09/15/98 stephen Added getStaticClassID()
30 * 02/22/99 stephen Removed character literals for EBCDIC safety
31 * 05/04/99 stephen Changed initDefault() for Mutex issues
32 * 07/12/99 helena HPUX 11 CC Port.
33 * 12/03/99 aliu Moved data out of static table into icudata.dll.
34 * Substantial rewrite of zone lookup, default zone, and
35 * available IDs code. Misc. cleanup.
36 *********************************************************************************/
37
38 #include "utypeinfo.h" // for 'typeid' to work
39
40 #include "unicode/utypes.h"
41 #include "unicode/ustring.h"
42 #include "ustr_imp.h"
43
44 #ifdef U_DEBUG_TZ
45 # include <stdio.h>
46 # include "uresimp.h" // for debugging
47
debug_tz_loc(const char * f,int32_t l)48 static void debug_tz_loc(const char *f, int32_t l)
49 {
50 fprintf(stderr, "%s:%d: ", f, l);
51 }
52
debug_tz_msg(const char * pat,...)53 static void debug_tz_msg(const char *pat, ...)
54 {
55 va_list ap;
56 va_start(ap, pat);
57 vfprintf(stderr, pat, ap);
58 fflush(stderr);
59 }
60 static char gStrBuf[256];
61 #define U_DEBUG_TZ_STR(x) u_austrncpy(gStrBuf,x,sizeof(gStrBuf)-1)
62 // must use double parens, i.e.: U_DEBUG_TZ_MSG(("four is: %d",4));
63 #define U_DEBUG_TZ_MSG(x) {debug_tz_loc(__FILE__,__LINE__);debug_tz_msg x;}
64 #else
65 #define U_DEBUG_TZ_MSG(x)
66 #endif
67
68 #if !UCONFIG_NO_FORMATTING
69
70 #include "unicode/simpletz.h"
71 #include "unicode/calendar.h"
72 #include "unicode/gregocal.h"
73 #include "unicode/ures.h"
74 #include "unicode/tzfmt.h"
75 #include "unicode/numfmt.h"
76 #include "gregoimp.h"
77 #include "uresimp.h" // struct UResourceBundle
78 #include "olsontz.h"
79 #include "mutex.h"
80 #include "unicode/udata.h"
81 #include "ucln_in.h"
82 #include "cstring.h"
83 #include "cmemory.h"
84 #include "unicode/strenum.h"
85 #include "uassert.h"
86 #include "zonemeta.h"
87
88 #define kZONEINFO "zoneinfo64"
89 #define kREGIONS "Regions"
90 #define kZONES "Zones"
91 #define kRULES "Rules"
92 #define kNAMES "Names"
93 #define kTZVERSION "TZVersion"
94 #define kLINKS "links"
95 #define kMAX_CUSTOM_HOUR 23
96 #define kMAX_CUSTOM_MIN 59
97 #define kMAX_CUSTOM_SEC 59
98 #define MINUS 0x002D
99 #define PLUS 0x002B
100 #define ZERO_DIGIT 0x0030
101 #define COLON 0x003A
102
103 // Static data and constants
104
105 static const UChar WORLD[] = {0x30, 0x30, 0x31, 0x00}; /* "001" */
106
107 static const UChar GMT_ID[] = {0x47, 0x4D, 0x54, 0x00}; /* "GMT" */
108 static const UChar UNKNOWN_ZONE_ID[] = {0x45, 0x74, 0x63, 0x2F, 0x55, 0x6E, 0x6B, 0x6E, 0x6F, 0x77, 0x6E, 0x00}; /* "Etc/Unknown" */
109 static const int32_t GMT_ID_LENGTH = 3;
110 static const int32_t UNKNOWN_ZONE_ID_LENGTH = 11;
111
112 static UMutex LOCK = U_MUTEX_INITIALIZER;
113 static UMutex TZSET_LOCK = U_MUTEX_INITIALIZER;
114 static icu::TimeZone* DEFAULT_ZONE = NULL;
115 static icu::TimeZone* _GMT = NULL;
116 static icu::TimeZone* _UNKNOWN_ZONE = NULL;
117
118 static char TZDATA_VERSION[16];
119 static UBool TZDataVersionInitialized = FALSE;
120
121 static int32_t* MAP_SYSTEM_ZONES = NULL;
122 static int32_t* MAP_CANONICAL_SYSTEM_ZONES = NULL;
123 static int32_t* MAP_CANONICAL_SYSTEM_LOCATION_ZONES = NULL;
124
125 static int32_t LEN_SYSTEM_ZONES = 0;
126 static int32_t LEN_CANONICAL_SYSTEM_ZONES = 0;
127 static int32_t LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
128
129 U_CDECL_BEGIN
timeZone_cleanup(void)130 static UBool U_CALLCONV timeZone_cleanup(void)
131 {
132 delete DEFAULT_ZONE;
133 DEFAULT_ZONE = NULL;
134
135 delete _GMT;
136 _GMT = NULL;
137
138 delete _UNKNOWN_ZONE;
139 _UNKNOWN_ZONE = NULL;
140
141 uprv_memset(TZDATA_VERSION, 0, sizeof(TZDATA_VERSION));
142 TZDataVersionInitialized = FALSE;
143
144 LEN_SYSTEM_ZONES = 0;
145 uprv_free(MAP_SYSTEM_ZONES);
146 MAP_SYSTEM_ZONES = 0;
147
148 LEN_CANONICAL_SYSTEM_ZONES = 0;
149 uprv_free(MAP_CANONICAL_SYSTEM_ZONES);
150 MAP_CANONICAL_SYSTEM_ZONES = 0;
151
152 LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
153 uprv_free(MAP_CANONICAL_SYSTEM_LOCATION_ZONES);
154 MAP_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
155
156 return TRUE;
157 }
158 U_CDECL_END
159
160 U_NAMESPACE_BEGIN
161
findInStringArray(UResourceBundle * array,const UnicodeString & id,UErrorCode & status)162 static int32_t findInStringArray(UResourceBundle* array, const UnicodeString& id, UErrorCode &status)
163 {
164 UnicodeString copy;
165 const UChar *u;
166 int32_t len;
167
168 int32_t start = 0;
169 int32_t limit = ures_getSize(array);
170 int32_t mid;
171 int32_t lastMid = INT32_MAX;
172 if(U_FAILURE(status) || (limit < 1)) {
173 return -1;
174 }
175 U_DEBUG_TZ_MSG(("fisa: Looking for %s, between %d and %d\n", U_DEBUG_TZ_STR(UnicodeString(id).getTerminatedBuffer()), start, limit));
176
177 for (;;) {
178 mid = (int32_t)((start + limit) / 2);
179 if (lastMid == mid) { /* Have we moved? */
180 break; /* We haven't moved, and it wasn't found. */
181 }
182 lastMid = mid;
183 u = ures_getStringByIndex(array, mid, &len, &status);
184 if (U_FAILURE(status)) {
185 break;
186 }
187 U_DEBUG_TZ_MSG(("tz: compare to %s, %d .. [%d] .. %d\n", U_DEBUG_TZ_STR(u), start, mid, limit));
188 copy.setTo(TRUE, u, len);
189 int r = id.compare(copy);
190 if(r==0) {
191 U_DEBUG_TZ_MSG(("fisa: found at %d\n", mid));
192 return mid;
193 } else if(r<0) {
194 limit = mid;
195 } else {
196 start = mid;
197 }
198 }
199 U_DEBUG_TZ_MSG(("fisa: not found\n"));
200 return -1;
201 }
202
203 /**
204 * Fetch a specific zone by name. Replaces the getByKey call.
205 * @param top Top timezone resource
206 * @param id Time zone ID
207 * @param oldbundle Bundle for reuse (or NULL). see 'ures_open()'
208 * @return the zone's bundle if found, or undefined if error. Reuses oldbundle.
209 */
getZoneByName(const UResourceBundle * top,const UnicodeString & id,UResourceBundle * oldbundle,UErrorCode & status)210 static UResourceBundle* getZoneByName(const UResourceBundle* top, const UnicodeString& id, UResourceBundle *oldbundle, UErrorCode& status) {
211 // load the Rules object
212 UResourceBundle *tmp = ures_getByKey(top, kNAMES, NULL, &status);
213
214 // search for the string
215 int32_t idx = findInStringArray(tmp, id, status);
216
217 if((idx == -1) && U_SUCCESS(status)) {
218 // not found
219 status = U_MISSING_RESOURCE_ERROR;
220 //ures_close(oldbundle);
221 //oldbundle = NULL;
222 } else {
223 U_DEBUG_TZ_MSG(("gzbn: oldbundle= size %d, type %d, %s\n", ures_getSize(tmp), ures_getType(tmp), u_errorName(status)));
224 tmp = ures_getByKey(top, kZONES, tmp, &status); // get Zones object from top
225 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)));
226 oldbundle = ures_getByIndex(tmp, idx, oldbundle, &status); // get nth Zone object
227 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)));
228 }
229 ures_close(tmp);
230 if(U_FAILURE(status)) {
231 //ures_close(oldbundle);
232 return NULL;
233 } else {
234 return oldbundle;
235 }
236 }
237
238
loadRule(const UResourceBundle * top,const UnicodeString & ruleid,UResourceBundle * oldbundle,UErrorCode & status)239 UResourceBundle* TimeZone::loadRule(const UResourceBundle* top, const UnicodeString& ruleid, UResourceBundle* oldbundle, UErrorCode& status) {
240 char key[64];
241 ruleid.extract(0, sizeof(key)-1, key, (int32_t)sizeof(key)-1, US_INV);
242 U_DEBUG_TZ_MSG(("loadRule(%s)\n", key));
243 UResourceBundle *r = ures_getByKey(top, kRULES, oldbundle, &status);
244 U_DEBUG_TZ_MSG(("loadRule(%s) -> kRULES [%s]\n", key, u_errorName(status)));
245 r = ures_getByKey(r, key, r, &status);
246 U_DEBUG_TZ_MSG(("loadRule(%s) -> item [%s]\n", key, u_errorName(status)));
247 return r;
248 }
249
250 /**
251 * Given an ID, open the appropriate resource for the given time zone.
252 * Dereference aliases if necessary.
253 * @param id zone id
254 * @param res resource, which must be ready for use (initialized but not open)
255 * @param ec input-output error code
256 * @return top-level resource bundle
257 */
openOlsonResource(const UnicodeString & id,UResourceBundle & res,UErrorCode & ec)258 static UResourceBundle* openOlsonResource(const UnicodeString& id,
259 UResourceBundle& res,
260 UErrorCode& ec)
261 {
262 #if U_DEBUG_TZ
263 char buf[128];
264 id.extract(0, sizeof(buf)-1, buf, sizeof(buf), "");
265 #endif
266 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
267 U_DEBUG_TZ_MSG(("pre: res sz=%d\n", ures_getSize(&res)));
268 /* &res = */ getZoneByName(top, id, &res, ec);
269 // Dereference if this is an alias. Docs say result should be 1
270 // but it is 0 in 2.8 (?).
271 U_DEBUG_TZ_MSG(("Loading zone '%s' (%s, size %d) - %s\n", buf, ures_getKey((UResourceBundle*)&res), ures_getSize(&res), u_errorName(ec)));
272 if (ures_getType(&res) == URES_INT) {
273 int32_t deref = ures_getInt(&res, &ec) + 0;
274 U_DEBUG_TZ_MSG(("getInt: %s - type is %d\n", u_errorName(ec), ures_getType(&res)));
275 UResourceBundle *ares = ures_getByKey(top, kZONES, NULL, &ec); // dereference Zones section
276 ures_getByIndex(ares, deref, &res, &ec);
277 ures_close(ares);
278 U_DEBUG_TZ_MSG(("alias to #%d (%s) - %s\n", deref, "??", u_errorName(ec)));
279 } else {
280 U_DEBUG_TZ_MSG(("not an alias - size %d\n", ures_getSize(&res)));
281 }
282 U_DEBUG_TZ_MSG(("%s - final status is %s\n", buf, u_errorName(ec)));
283 return top;
284 }
285
286 // -------------------------------------
287
288 namespace {
289
290 void
ensureStaticTimeZones()291 ensureStaticTimeZones() {
292 UBool needsInit;
293 UMTX_CHECK(&LOCK, (_GMT == NULL), needsInit); /* This is here to prevent race conditions. */
294
295 // Initialize _GMT independently of other static data; it should
296 // be valid even if we can't load the time zone UDataMemory.
297 if (needsInit) {
298 SimpleTimeZone *tmpUnknown =
299 new SimpleTimeZone(0, UnicodeString(TRUE, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH));
300 SimpleTimeZone *tmpGMT = new SimpleTimeZone(0, UnicodeString(TRUE, GMT_ID, GMT_ID_LENGTH));
301 umtx_lock(&LOCK);
302 if (_UNKNOWN_ZONE == 0) {
303 _UNKNOWN_ZONE = tmpUnknown;
304 tmpUnknown = NULL;
305 }
306 if (_GMT == 0) {
307 _GMT = tmpGMT;
308 tmpGMT = NULL;
309 }
310 umtx_unlock(&LOCK);
311 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
312 delete tmpUnknown;
313 delete tmpGMT;
314 }
315 }
316
317 } // anonymous namespace
318
319 const TimeZone& U_EXPORT2
getUnknown()320 TimeZone::getUnknown()
321 {
322 ensureStaticTimeZones();
323 return *_UNKNOWN_ZONE;
324 }
325
326 const TimeZone* U_EXPORT2
getGMT(void)327 TimeZone::getGMT(void)
328 {
329 ensureStaticTimeZones();
330 return _GMT;
331 }
332
333 // *****************************************************************************
334 // class TimeZone
335 // *****************************************************************************
336
UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)337 UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)
338
339 TimeZone::TimeZone()
340 : UObject(), fID()
341 {
342 }
343
344 // -------------------------------------
345
TimeZone(const UnicodeString & id)346 TimeZone::TimeZone(const UnicodeString &id)
347 : UObject(), fID(id)
348 {
349 }
350
351 // -------------------------------------
352
~TimeZone()353 TimeZone::~TimeZone()
354 {
355 }
356
357 // -------------------------------------
358
TimeZone(const TimeZone & source)359 TimeZone::TimeZone(const TimeZone &source)
360 : UObject(source), fID(source.fID)
361 {
362 }
363
364 // -------------------------------------
365
366 TimeZone &
operator =(const TimeZone & right)367 TimeZone::operator=(const TimeZone &right)
368 {
369 if (this != &right) fID = right.fID;
370 return *this;
371 }
372
373 // -------------------------------------
374
375 UBool
operator ==(const TimeZone & that) const376 TimeZone::operator==(const TimeZone& that) const
377 {
378 return typeid(*this) == typeid(that) &&
379 fID == that.fID;
380 }
381
382 // -------------------------------------
383
384 TimeZone* U_EXPORT2
createTimeZone(const UnicodeString & ID)385 TimeZone::createTimeZone(const UnicodeString& ID)
386 {
387 /* We first try to lookup the zone ID in our system list. If this
388 * fails, we try to parse it as a custom string GMT[+-]hh:mm. If
389 * all else fails, we return GMT, which is probably not what the
390 * user wants, but at least is a functioning TimeZone object.
391 *
392 * We cannot return NULL, because that would break compatibility
393 * with the JDK.
394 */
395 TimeZone* result = createSystemTimeZone(ID);
396
397 if (result == 0) {
398 U_DEBUG_TZ_MSG(("failed to load system time zone with id - falling to custom"));
399 result = createCustomTimeZone(ID);
400 }
401 if (result == 0) {
402 U_DEBUG_TZ_MSG(("failed to load time zone with id - falling to Etc/Unknown(GMT)"));
403 result = getUnknown().clone();
404 }
405 return result;
406 }
407
408 /**
409 * Lookup the given name in our system zone table. If found,
410 * instantiate a new zone of that name and return it. If not
411 * found, return 0.
412 */
413 TimeZone*
createSystemTimeZone(const UnicodeString & id)414 TimeZone::createSystemTimeZone(const UnicodeString& id) {
415 UErrorCode ec = U_ZERO_ERROR;
416 return createSystemTimeZone(id, ec);
417 }
418
419 TimeZone*
createSystemTimeZone(const UnicodeString & id,UErrorCode & ec)420 TimeZone::createSystemTimeZone(const UnicodeString& id, UErrorCode& ec) {
421 if (U_FAILURE(ec)) {
422 return NULL;
423 }
424 TimeZone* z = 0;
425 UResourceBundle res;
426 ures_initStackObject(&res);
427 U_DEBUG_TZ_MSG(("pre-err=%s\n", u_errorName(ec)));
428 UResourceBundle *top = openOlsonResource(id, res, ec);
429 U_DEBUG_TZ_MSG(("post-err=%s\n", u_errorName(ec)));
430 if (U_SUCCESS(ec)) {
431 z = new OlsonTimeZone(top, &res, id, ec);
432 if (z == NULL) {
433 U_DEBUG_TZ_MSG(("cstz: olson time zone failed to initialize - err %s\n", u_errorName(ec)));
434 }
435 }
436 ures_close(&res);
437 ures_close(top);
438 if (U_FAILURE(ec)) {
439 U_DEBUG_TZ_MSG(("cstz: failed to create, err %s\n", u_errorName(ec)));
440 delete z;
441 z = 0;
442 }
443 return z;
444 }
445
446 // -------------------------------------
447
448 /**
449 * Initialize DEFAULT_ZONE from the system default time zone. The
450 * caller should confirm that DEFAULT_ZONE is NULL before calling.
451 * Upon return, DEFAULT_ZONE will not be NULL, unless operator new()
452 * returns NULL.
453 *
454 * Must be called OUTSIDE mutex.
455 */
456 void
initDefault()457 TimeZone::initDefault()
458 {
459 // We access system timezone data through TPlatformUtilities,
460 // including tzset(), timezone, and tzname[].
461 int32_t rawOffset = 0;
462 const char *hostID;
463
464 // First, try to create a system timezone, based
465 // on the string ID in tzname[0].
466 {
467 // NOTE: Local mutex here. TimeZone mutex below
468 // mutexed to avoid threading issues in the platform functions.
469 // Some of the locale/timezone OS functions may not be thread safe,
470 // so the intent is that any setting from anywhere within ICU
471 // happens while the ICU mutex is held.
472 // The operating system might actually use ICU to implement timezones.
473 // So we may have ICU calling ICU here, like on AIX.
474 // In order to prevent a double lock of a non-reentrant mutex in a
475 // different part of ICU, we use TZSET_LOCK to allow only one instance
476 // of ICU to query these thread unsafe OS functions at any given time.
477 Mutex lock(&TZSET_LOCK);
478
479 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
480 uprv_tzset(); // Initialize tz... system data
481
482 // Get the timezone ID from the host. This function should do
483 // any required host-specific remapping; e.g., on Windows this
484 // function maps the Date and Time control panel setting to an
485 // ICU timezone ID.
486 hostID = uprv_tzname(0);
487
488 // Invert sign because UNIX semantics are backwards
489 rawOffset = uprv_timezone() * -U_MILLIS_PER_SECOND;
490 }
491
492 UBool initialized;
493 UMTX_CHECK(&LOCK, (DEFAULT_ZONE != NULL), initialized);
494 if (initialized) {
495 /* Hrmph? Either a race condition happened, or tzset initialized ICU. */
496 return;
497 }
498
499 TimeZone* default_zone = NULL;
500
501 /* Make sure that the string is NULL terminated to prevent BoundsChecker/Purify warnings. */
502 UnicodeString hostStrID(hostID, -1, US_INV);
503 hostStrID.append((UChar)0);
504 hostStrID.truncate(hostStrID.length()-1);
505 default_zone = createSystemTimeZone(hostStrID);
506
507 #if U_PLATFORM_USES_ONLY_WIN32_API
508 // hostID points to a heap-allocated location on Windows.
509 uprv_free(const_cast<char *>(hostID));
510 #endif
511
512 int32_t hostIDLen = hostStrID.length();
513 if (default_zone != NULL && rawOffset != default_zone->getRawOffset()
514 && (3 <= hostIDLen && hostIDLen <= 4))
515 {
516 // Uh oh. This probably wasn't a good id.
517 // It was probably an ambiguous abbreviation
518 delete default_zone;
519 default_zone = NULL;
520 }
521
522 // Construct a fixed standard zone with the host's ID
523 // and raw offset.
524 if (default_zone == NULL) {
525 default_zone = new SimpleTimeZone(rawOffset, hostStrID);
526 }
527
528 // If we _still_ don't have a time zone, use GMT.
529 if (default_zone == NULL) {
530 const TimeZone* temptz = getGMT();
531 // If we can't use GMT, get out.
532 if (temptz == NULL) {
533 return;
534 }
535 default_zone = temptz->clone();
536 }
537
538 // If DEFAULT_ZONE is still NULL, set it up.
539 umtx_lock(&LOCK);
540 if (DEFAULT_ZONE == NULL) {
541 DEFAULT_ZONE = default_zone;
542 default_zone = NULL;
543 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
544 }
545 umtx_unlock(&LOCK);
546
547 delete default_zone;
548 }
549
550 // -------------------------------------
551
552 TimeZone* U_EXPORT2
createDefault()553 TimeZone::createDefault()
554 {
555 /* This is here to prevent race conditions. */
556 UBool needsInit;
557 UMTX_CHECK(&LOCK, (DEFAULT_ZONE == NULL), needsInit);
558 if (needsInit) {
559 initDefault();
560 }
561
562 Mutex lock(&LOCK); // In case adoptDefault is called
563 return (DEFAULT_ZONE != NULL) ? DEFAULT_ZONE->clone() : NULL;
564 }
565
566 // -------------------------------------
567
568 void U_EXPORT2
adoptDefault(TimeZone * zone)569 TimeZone::adoptDefault(TimeZone* zone)
570 {
571 if (zone != NULL)
572 {
573 TimeZone* old = NULL;
574
575 umtx_lock(&LOCK);
576 old = DEFAULT_ZONE;
577 DEFAULT_ZONE = zone;
578 umtx_unlock(&LOCK);
579
580 delete old;
581 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
582 }
583 }
584 // -------------------------------------
585
586 void U_EXPORT2
setDefault(const TimeZone & zone)587 TimeZone::setDefault(const TimeZone& zone)
588 {
589 adoptDefault(zone.clone());
590 }
591
592 //----------------------------------------------------------------------
593
594 /**
595 * This is the default implementation for subclasses that do not
596 * override this method. This implementation calls through to the
597 * 8-argument getOffset() method after suitable computations, and
598 * correctly adjusts GMT millis to local millis when necessary.
599 */
getOffset(UDate date,UBool local,int32_t & rawOffset,int32_t & dstOffset,UErrorCode & ec) const600 void TimeZone::getOffset(UDate date, UBool local, int32_t& rawOffset,
601 int32_t& dstOffset, UErrorCode& ec) const {
602 if (U_FAILURE(ec)) {
603 return;
604 }
605
606 rawOffset = getRawOffset();
607 if (!local) {
608 date += rawOffset; // now in local standard millis
609 }
610
611 // When local == TRUE, date might not be in local standard
612 // millis. getOffset taking 7 parameters used here assume
613 // the given time in day is local standard time.
614 // At STD->DST transition, there is a range of time which
615 // does not exist. When 'date' is in this time range
616 // (and local == TRUE), this method interprets the specified
617 // local time as DST. At DST->STD transition, there is a
618 // range of time which occurs twice. In this case, this
619 // method interprets the specified local time as STD.
620 // To support the behavior above, we need to call getOffset
621 // (with 7 args) twice when local == true and DST is
622 // detected in the initial call.
623 for (int32_t pass=0; ; ++pass) {
624 int32_t year, month, dom, dow;
625 double day = uprv_floor(date / U_MILLIS_PER_DAY);
626 int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
627
628 Grego::dayToFields(day, year, month, dom, dow);
629
630 dstOffset = getOffset(GregorianCalendar::AD, year, month, dom,
631 (uint8_t) dow, millis,
632 Grego::monthLength(year, month),
633 ec) - rawOffset;
634
635 // Recompute if local==TRUE, dstOffset!=0.
636 if (pass!=0 || !local || dstOffset == 0) {
637 break;
638 }
639 // adjust to local standard millis
640 date -= dstOffset;
641 }
642 }
643
644 // -------------------------------------
645
646 // New available IDs API as of ICU 2.4. Uses StringEnumeration API.
647
648 class TZEnumeration : public StringEnumeration {
649 private:
650
651 // Map into to zones. Our results are zone[map[i]] for
652 // i=0..len-1, where zone[i] is the i-th Olson zone. If map==NULL
653 // then our results are zone[i] for i=0..len-1. Len will be zero
654 // if the zone data could not be loaded.
655 int32_t* map;
656 int32_t* localMap;
657 int32_t len;
658 int32_t pos;
659
TZEnumeration(int32_t * mapData,int32_t mapLen,UBool adoptMapData)660 TZEnumeration(int32_t* mapData, int32_t mapLen, UBool adoptMapData) : pos(0) {
661 map = mapData;
662 localMap = adoptMapData ? mapData : NULL;
663 len = mapLen;
664 }
665
getID(int32_t i)666 UBool getID(int32_t i) {
667 UErrorCode ec = U_ZERO_ERROR;
668 int32_t idLen = 0;
669 const UChar* id = NULL;
670 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
671 top = ures_getByKey(top, kNAMES, top, &ec); // dereference Zones section
672 id = ures_getStringByIndex(top, i, &idLen, &ec);
673 if(U_FAILURE(ec)) {
674 unistr.truncate(0);
675 }
676 else {
677 unistr.fastCopyFrom(UnicodeString(TRUE, id, idLen));
678 }
679 ures_close(top);
680 return U_SUCCESS(ec);
681 }
682
getMap(USystemTimeZoneType type,int32_t & len,UErrorCode & ec)683 static int32_t* getMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) {
684 len = 0;
685 if (U_FAILURE(ec)) {
686 return NULL;
687 }
688 int32_t* m = NULL;
689 switch (type) {
690 case UCAL_ZONE_TYPE_ANY:
691 m = MAP_SYSTEM_ZONES;
692 len = LEN_SYSTEM_ZONES;
693 break;
694 case UCAL_ZONE_TYPE_CANONICAL:
695 m = MAP_CANONICAL_SYSTEM_ZONES;
696 len = LEN_CANONICAL_SYSTEM_ZONES;
697 break;
698 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
699 m = MAP_CANONICAL_SYSTEM_LOCATION_ZONES;
700 len = LEN_CANONICAL_SYSTEM_LOCATION_ZONES;
701 break;
702 }
703 UBool needsInit = FALSE;
704 UMTX_CHECK(&LOCK, (len == 0), needsInit);
705 if (needsInit) {
706 m = initMap(type, len, ec);
707 }
708 return m;
709 }
710
initMap(USystemTimeZoneType type,int32_t & len,UErrorCode & ec)711 static int32_t* initMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) {
712 len = 0;
713 if (U_FAILURE(ec)) {
714 return NULL;
715 }
716
717 int32_t *result = NULL;
718
719 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
720 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
721 if (U_SUCCESS(ec)) {
722 int32_t size = ures_getSize(res);
723 int32_t *m = (int32_t *)uprv_malloc(size * sizeof(int32_t));
724 if (m == NULL) {
725 ec = U_MEMORY_ALLOCATION_ERROR;
726 } else {
727 int32_t numEntries = 0;
728 for (int32_t i = 0; i < size; i++) {
729 UnicodeString id = ures_getUnicodeStringByIndex(res, i, &ec);
730 if (U_FAILURE(ec)) {
731 break;
732 }
733 if (0 == id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH)) {
734 // exclude Etc/Unknown
735 continue;
736 }
737 if (type == UCAL_ZONE_TYPE_CANONICAL || type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
738 UnicodeString canonicalID;
739 ZoneMeta::getCanonicalCLDRID(id, canonicalID, ec);
740 if (U_FAILURE(ec)) {
741 break;
742 }
743 if (canonicalID != id) {
744 // exclude aliases
745 continue;
746 }
747 }
748 if (type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
749 const UChar *region = TimeZone::getRegion(id, ec);
750 if (U_FAILURE(ec)) {
751 break;
752 }
753 if (u_strcmp(region, WORLD) == 0) {
754 // exclude non-location ("001")
755 continue;
756 }
757 }
758 m[numEntries++] = i;
759 }
760 if (U_SUCCESS(ec)) {
761 int32_t *tmp = m;
762 m = (int32_t *)uprv_realloc(tmp, numEntries * sizeof(int32_t));
763 if (m == NULL) {
764 // realloc failed.. use the original one even it has unused
765 // area at the end
766 m = tmp;
767 }
768
769 umtx_lock(&LOCK);
770 {
771 switch(type) {
772 case UCAL_ZONE_TYPE_ANY:
773 if (MAP_SYSTEM_ZONES == NULL) {
774 MAP_SYSTEM_ZONES = m;
775 LEN_SYSTEM_ZONES = numEntries;
776 m = NULL;
777 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
778 }
779 result = MAP_SYSTEM_ZONES;
780 len = LEN_SYSTEM_ZONES;
781 break;
782 case UCAL_ZONE_TYPE_CANONICAL:
783 if (MAP_CANONICAL_SYSTEM_ZONES == NULL) {
784 MAP_CANONICAL_SYSTEM_ZONES = m;
785 LEN_CANONICAL_SYSTEM_ZONES = numEntries;
786 m = NULL;
787 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
788 }
789 result = MAP_CANONICAL_SYSTEM_ZONES;
790 len = LEN_CANONICAL_SYSTEM_ZONES;
791 break;
792 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
793 if (MAP_CANONICAL_SYSTEM_LOCATION_ZONES == NULL) {
794 MAP_CANONICAL_SYSTEM_LOCATION_ZONES = m;
795 LEN_CANONICAL_SYSTEM_LOCATION_ZONES = numEntries;
796 m = NULL;
797 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
798 }
799 result = MAP_CANONICAL_SYSTEM_LOCATION_ZONES;
800 len = LEN_CANONICAL_SYSTEM_LOCATION_ZONES;
801 break;
802 }
803 }
804 umtx_unlock(&LOCK);
805 }
806 uprv_free(m);
807 }
808 }
809
810 ures_close(res);
811 return result;
812 }
813
814 public:
815
816 #define DEFAULT_FILTERED_MAP_SIZE 8
817 #define MAP_INCREMENT_SIZE 8
818
create(USystemTimeZoneType type,const char * region,const int32_t * rawOffset,UErrorCode & ec)819 static TZEnumeration* create(USystemTimeZoneType type, const char* region, const int32_t* rawOffset, UErrorCode& ec) {
820 if (U_FAILURE(ec)) {
821 return NULL;
822 }
823
824 int32_t baseLen;
825 int32_t *baseMap = getMap(type, baseLen, ec);
826
827 if (U_FAILURE(ec)) {
828 return NULL;
829 }
830
831 // If any additional conditions are available,
832 // create instance local map filtered by the conditions.
833
834 int32_t *filteredMap = NULL;
835 int32_t numEntries = 0;
836
837 if (region != NULL || rawOffset != NULL) {
838 int32_t filteredMapSize = DEFAULT_FILTERED_MAP_SIZE;
839 filteredMap = (int32_t *)uprv_malloc(filteredMapSize * sizeof(int32_t));
840 if (filteredMap == NULL) {
841 ec = U_MEMORY_ALLOCATION_ERROR;
842 return NULL;
843 }
844
845 // Walk through the base map
846 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
847 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
848 for (int32_t i = 0; i < baseLen; i++) {
849 int32_t zidx = baseMap[i];
850 UnicodeString id = ures_getUnicodeStringByIndex(res, zidx, &ec);
851 if (U_FAILURE(ec)) {
852 break;
853 }
854 if (region != NULL) {
855 // Filter by region
856 char tzregion[4]; // max 3 letters + null term
857 TimeZone::getRegion(id, tzregion, sizeof(tzregion), ec);
858 if (U_FAILURE(ec)) {
859 break;
860 }
861 if (uprv_stricmp(tzregion, region) != 0) {
862 // region does not match
863 continue;
864 }
865 }
866 if (rawOffset != NULL) {
867 // Filter by raw offset
868 // Note: This is VERY inefficient
869 TimeZone *z = TimeZone::createSystemTimeZone(id, ec);
870 if (U_FAILURE(ec)) {
871 break;
872 }
873 int32_t tzoffset = z->getRawOffset();
874 delete z;
875
876 if (tzoffset != *rawOffset) {
877 continue;
878 }
879 }
880
881 if (filteredMapSize <= numEntries) {
882 filteredMapSize += MAP_INCREMENT_SIZE;
883 int32_t *tmp = (int32_t *)uprv_realloc(filteredMap, filteredMapSize * sizeof(int32_t));
884 if (tmp == NULL) {
885 ec = U_MEMORY_ALLOCATION_ERROR;
886 break;
887 } else {
888 filteredMap = tmp;
889 }
890 }
891
892 filteredMap[numEntries++] = zidx;
893 }
894
895 if (U_FAILURE(ec)) {
896 uprv_free(filteredMap);
897 filteredMap = NULL;
898 }
899
900 ures_close(res);
901 }
902
903 TZEnumeration *result = NULL;
904 if (U_SUCCESS(ec)) {
905 // Finally, create a new enumeration instance
906 if (filteredMap == NULL) {
907 result = new TZEnumeration(baseMap, baseLen, FALSE);
908 } else {
909 result = new TZEnumeration(filteredMap, numEntries, TRUE);
910 filteredMap = NULL;
911 }
912 if (result == NULL) {
913 ec = U_MEMORY_ALLOCATION_ERROR;
914 }
915 }
916
917 if (filteredMap != NULL) {
918 uprv_free(filteredMap);
919 }
920
921 return result;
922 }
923
TZEnumeration(const TZEnumeration & other)924 TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(NULL), localMap(NULL), len(0), pos(0) {
925 if (other.localMap != NULL) {
926 localMap = (int32_t *)uprv_malloc(other.len * sizeof(int32_t));
927 if (localMap != NULL) {
928 len = other.len;
929 uprv_memcpy(localMap, other.localMap, len * sizeof(int32_t));
930 pos = other.pos;
931 map = localMap;
932 } else {
933 len = 0;
934 pos = 0;
935 map = NULL;
936 }
937 } else {
938 map = other.map;
939 localMap = NULL;
940 len = other.len;
941 pos = other.pos;
942 }
943 }
944
945 virtual ~TZEnumeration();
946
clone() const947 virtual StringEnumeration *clone() const {
948 return new TZEnumeration(*this);
949 }
950
count(UErrorCode & status) const951 virtual int32_t count(UErrorCode& status) const {
952 return U_FAILURE(status) ? 0 : len;
953 }
954
snext(UErrorCode & status)955 virtual const UnicodeString* snext(UErrorCode& status) {
956 if (U_SUCCESS(status) && map != NULL && pos < len) {
957 getID(map[pos]);
958 ++pos;
959 return &unistr;
960 }
961 return 0;
962 }
963
reset(UErrorCode &)964 virtual void reset(UErrorCode& /*status*/) {
965 pos = 0;
966 }
967
968 public:
969 static UClassID U_EXPORT2 getStaticClassID(void);
970 virtual UClassID getDynamicClassID(void) const;
971 };
972
~TZEnumeration()973 TZEnumeration::~TZEnumeration() {
974 if (localMap != NULL) {
975 uprv_free(localMap);
976 }
977 }
978
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)979 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)
980
981 StringEnumeration* U_EXPORT2
982 TimeZone::createTimeZoneIDEnumeration(
983 USystemTimeZoneType zoneType,
984 const char* region,
985 const int32_t* rawOffset,
986 UErrorCode& ec) {
987 return TZEnumeration::create(zoneType, region, rawOffset, ec);
988 }
989
990 StringEnumeration* U_EXPORT2
createEnumeration()991 TimeZone::createEnumeration() {
992 UErrorCode ec = U_ZERO_ERROR;
993 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, NULL, ec);
994 }
995
996 StringEnumeration* U_EXPORT2
createEnumeration(int32_t rawOffset)997 TimeZone::createEnumeration(int32_t rawOffset) {
998 UErrorCode ec = U_ZERO_ERROR;
999 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, &rawOffset, ec);
1000 }
1001
1002 StringEnumeration* U_EXPORT2
createEnumeration(const char * country)1003 TimeZone::createEnumeration(const char* country) {
1004 UErrorCode ec = U_ZERO_ERROR;
1005 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, country, NULL, ec);
1006 }
1007
1008 // ---------------------------------------
1009
1010 int32_t U_EXPORT2
countEquivalentIDs(const UnicodeString & id)1011 TimeZone::countEquivalentIDs(const UnicodeString& id) {
1012 int32_t result = 0;
1013 UErrorCode ec = U_ZERO_ERROR;
1014 UResourceBundle res;
1015 ures_initStackObject(&res);
1016 U_DEBUG_TZ_MSG(("countEquivalentIDs..\n"));
1017 UResourceBundle *top = openOlsonResource(id, res, ec);
1018 if (U_SUCCESS(ec)) {
1019 UResourceBundle r;
1020 ures_initStackObject(&r);
1021 ures_getByKey(&res, kLINKS, &r, &ec);
1022 ures_getIntVector(&r, &result, &ec);
1023 ures_close(&r);
1024 }
1025 ures_close(&res);
1026 ures_close(top);
1027 return result;
1028 }
1029
1030 // ---------------------------------------
1031
1032 const UnicodeString U_EXPORT2
getEquivalentID(const UnicodeString & id,int32_t index)1033 TimeZone::getEquivalentID(const UnicodeString& id, int32_t index) {
1034 U_DEBUG_TZ_MSG(("gEI(%d)\n", index));
1035 UnicodeString result;
1036 UErrorCode ec = U_ZERO_ERROR;
1037 UResourceBundle res;
1038 ures_initStackObject(&res);
1039 UResourceBundle *top = openOlsonResource(id, res, ec);
1040 int32_t zone = -1;
1041 if (U_SUCCESS(ec)) {
1042 UResourceBundle r;
1043 ures_initStackObject(&r);
1044 int32_t size;
1045 ures_getByKey(&res, kLINKS, &r, &ec);
1046 const int32_t* v = ures_getIntVector(&r, &size, &ec);
1047 if (U_SUCCESS(ec)) {
1048 if (index >= 0 && index < size) {
1049 zone = v[index];
1050 }
1051 }
1052 ures_close(&r);
1053 }
1054 ures_close(&res);
1055 if (zone >= 0) {
1056 UResourceBundle *ares = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Zones section
1057 if (U_SUCCESS(ec)) {
1058 int32_t idLen = 0;
1059 const UChar* id = ures_getStringByIndex(ares, zone, &idLen, &ec);
1060 result.fastCopyFrom(UnicodeString(TRUE, id, idLen));
1061 U_DEBUG_TZ_MSG(("gei(%d) -> %d, len%d, %s\n", index, zone, result.length(), u_errorName(ec)));
1062 }
1063 ures_close(ares);
1064 }
1065 ures_close(top);
1066 #if defined(U_DEBUG_TZ)
1067 if(result.length() ==0) {
1068 U_DEBUG_TZ_MSG(("equiv [__, #%d] -> 0 (%s)\n", index, u_errorName(ec)));
1069 }
1070 #endif
1071 return result;
1072 }
1073
1074 // ---------------------------------------
1075
1076 // These methods are used by ZoneMeta class only.
1077
1078 const UChar*
findID(const UnicodeString & id)1079 TimeZone::findID(const UnicodeString& id) {
1080 const UChar *result = NULL;
1081 UErrorCode ec = U_ZERO_ERROR;
1082 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1083
1084 // resolve zone index by name
1085 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1086 int32_t idx = findInStringArray(names, id, ec);
1087 result = ures_getStringByIndex(names, idx, NULL, &ec);
1088 if (U_FAILURE(ec)) {
1089 result = NULL;
1090 }
1091 ures_close(names);
1092 ures_close(rb);
1093 return result;
1094 }
1095
1096
1097 const UChar*
dereferOlsonLink(const UnicodeString & id)1098 TimeZone::dereferOlsonLink(const UnicodeString& id) {
1099 const UChar *result = NULL;
1100 UErrorCode ec = U_ZERO_ERROR;
1101 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1102
1103 // resolve zone index by name
1104 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1105 int32_t idx = findInStringArray(names, id, ec);
1106 result = ures_getStringByIndex(names, idx, NULL, &ec);
1107
1108 // open the zone bundle by index
1109 ures_getByKey(rb, kZONES, rb, &ec);
1110 ures_getByIndex(rb, idx, rb, &ec);
1111
1112 if (U_SUCCESS(ec)) {
1113 if (ures_getType(rb) == URES_INT) {
1114 // this is a link - dereference the link
1115 int32_t deref = ures_getInt(rb, &ec);
1116 const UChar* tmp = ures_getStringByIndex(names, deref, NULL, &ec);
1117 if (U_SUCCESS(ec)) {
1118 result = tmp;
1119 }
1120 }
1121 }
1122
1123 ures_close(names);
1124 ures_close(rb);
1125
1126 return result;
1127 }
1128
1129 const UChar*
getRegion(const UnicodeString & id)1130 TimeZone::getRegion(const UnicodeString& id) {
1131 UErrorCode status = U_ZERO_ERROR;
1132 return getRegion(id, status);
1133 }
1134
1135 const UChar*
getRegion(const UnicodeString & id,UErrorCode & status)1136 TimeZone::getRegion(const UnicodeString& id, UErrorCode& status) {
1137 if (U_FAILURE(status)) {
1138 return NULL;
1139 }
1140 const UChar *result = NULL;
1141 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &status);
1142
1143 // resolve zone index by name
1144 UResourceBundle *res = ures_getByKey(rb, kNAMES, NULL, &status);
1145 int32_t idx = findInStringArray(res, id, status);
1146
1147 // get region mapping
1148 ures_getByKey(rb, kREGIONS, res, &status);
1149 const UChar *tmp = ures_getStringByIndex(res, idx, NULL, &status);
1150 if (U_SUCCESS(status)) {
1151 result = tmp;
1152 }
1153
1154 ures_close(res);
1155 ures_close(rb);
1156
1157 return result;
1158 }
1159
1160
1161 // ---------------------------------------
1162 int32_t
getRegion(const UnicodeString & id,char * region,int32_t capacity,UErrorCode & status)1163 TimeZone::getRegion(const UnicodeString& id, char *region, int32_t capacity, UErrorCode& status)
1164 {
1165 int32_t resultLen = 0;
1166 *region = 0;
1167 if (U_FAILURE(status)) {
1168 return 0;
1169 }
1170
1171 const UChar *uregion = NULL;
1172 // "Etc/Unknown" is not a system zone ID,
1173 // but in the zone data
1174 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) != 0) {
1175 uregion = getRegion(id);
1176 }
1177 if (uregion == NULL) {
1178 status = U_ILLEGAL_ARGUMENT_ERROR;
1179 return 0;
1180 }
1181 resultLen = u_strlen(uregion);
1182 // A region code is represented by invariant characters
1183 u_UCharsToChars(uregion, region, uprv_min(resultLen, capacity));
1184
1185 if (capacity < resultLen) {
1186 status = U_BUFFER_OVERFLOW_ERROR;
1187 return resultLen;
1188 }
1189
1190 return u_terminateChars(region, capacity, resultLen, &status);
1191 }
1192
1193 // ---------------------------------------
1194
1195
1196 UnicodeString&
getDisplayName(UnicodeString & result) const1197 TimeZone::getDisplayName(UnicodeString& result) const
1198 {
1199 return getDisplayName(FALSE,LONG,Locale::getDefault(), result);
1200 }
1201
1202 UnicodeString&
getDisplayName(const Locale & locale,UnicodeString & result) const1203 TimeZone::getDisplayName(const Locale& locale, UnicodeString& result) const
1204 {
1205 return getDisplayName(FALSE, LONG, locale, result);
1206 }
1207
1208 UnicodeString&
getDisplayName(UBool daylight,EDisplayType style,UnicodeString & result) const1209 TimeZone::getDisplayName(UBool daylight, EDisplayType style, UnicodeString& result) const
1210 {
1211 return getDisplayName(daylight,style, Locale::getDefault(), result);
1212 }
1213 //--------------------------------------
1214 int32_t
getDSTSavings() const1215 TimeZone::getDSTSavings()const {
1216 if (useDaylightTime()) {
1217 return 3600000;
1218 }
1219 return 0;
1220 }
1221 //---------------------------------------
1222 UnicodeString&
getDisplayName(UBool daylight,EDisplayType style,const Locale & locale,UnicodeString & result) const1223 TimeZone::getDisplayName(UBool daylight, EDisplayType style, const Locale& locale, UnicodeString& result) const
1224 {
1225 UErrorCode status = U_ZERO_ERROR;
1226 UDate date = Calendar::getNow();
1227 UTimeZoneFormatTimeType timeType;
1228 int32_t offset;
1229
1230 if (style == GENERIC_LOCATION || style == LONG_GENERIC || style == SHORT_GENERIC) {
1231 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1232 if (U_FAILURE(status)) {
1233 result.remove();
1234 return result;
1235 }
1236 // Generic format
1237 switch (style) {
1238 case GENERIC_LOCATION:
1239 tzfmt->format(UTZFMT_STYLE_GENERIC_LOCATION, *this, date, result, &timeType);
1240 break;
1241 case LONG_GENERIC:
1242 tzfmt->format(UTZFMT_STYLE_GENERIC_LONG, *this, date, result, &timeType);
1243 break;
1244 case SHORT_GENERIC:
1245 tzfmt->format(UTZFMT_STYLE_GENERIC_SHORT, *this, date, result, &timeType);
1246 break;
1247 default:
1248 U_ASSERT(FALSE);
1249 }
1250 // Generic format many use Localized GMT as the final fallback.
1251 // When Localized GMT format is used, the result might not be
1252 // appropriate for the requested daylight value.
1253 if ((daylight && timeType == UTZFMT_TIME_TYPE_STANDARD) || (!daylight && timeType == UTZFMT_TIME_TYPE_DAYLIGHT)) {
1254 offset = daylight ? getRawOffset() + getDSTSavings() : getRawOffset();
1255 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1256 }
1257 } else if (style == LONG_GMT || style == SHORT_GMT) {
1258 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1259 if (U_FAILURE(status)) {
1260 result.remove();
1261 return result;
1262 }
1263 offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1264 switch (style) {
1265 case LONG_GMT:
1266 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1267 break;
1268 case SHORT_GMT:
1269 tzfmt->formatOffsetRFC822(offset, result, status);
1270 break;
1271 default:
1272 U_ASSERT(FALSE);
1273 }
1274
1275 } else {
1276 U_ASSERT(style == LONG || style == SHORT || style == SHORT_COMMONLY_USED);
1277 UTimeZoneNameType nameType = UTZNM_UNKNOWN;
1278 switch (style) {
1279 case LONG:
1280 nameType = daylight ? UTZNM_LONG_DAYLIGHT : UTZNM_LONG_STANDARD;
1281 break;
1282 case SHORT:
1283 case SHORT_COMMONLY_USED:
1284 nameType = daylight ? UTZNM_SHORT_DAYLIGHT : UTZNM_SHORT_STANDARD;
1285 break;
1286 default:
1287 U_ASSERT(FALSE);
1288 }
1289 LocalPointer<TimeZoneNames> tznames(TimeZoneNames::createInstance(locale, status));
1290 if (U_FAILURE(status)) {
1291 result.remove();
1292 return result;
1293 }
1294 UnicodeString canonicalID(ZoneMeta::getCanonicalCLDRID(*this));
1295 tznames->getDisplayName(canonicalID, nameType, date, result);
1296 if (result.isEmpty()) {
1297 // Fallback to localized GMT
1298 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1299 offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1300 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1301 }
1302 }
1303 if (U_FAILURE(status)) {
1304 result.remove();
1305 }
1306 return result;
1307 }
1308
1309 /**
1310 * Parse a custom time zone identifier and return a corresponding zone.
1311 * @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
1312 * GMT[+-]hh.
1313 * @return a newly created SimpleTimeZone with the given offset and
1314 * no Daylight Savings Time, or null if the id cannot be parsed.
1315 */
1316 TimeZone*
createCustomTimeZone(const UnicodeString & id)1317 TimeZone::createCustomTimeZone(const UnicodeString& id)
1318 {
1319 int32_t sign, hour, min, sec;
1320 if (parseCustomID(id, sign, hour, min, sec)) {
1321 UnicodeString customID;
1322 formatCustomID(hour, min, sec, (sign < 0), customID);
1323 int32_t offset = sign * ((hour * 60 + min) * 60 + sec) * 1000;
1324 return new SimpleTimeZone(offset, customID);
1325 }
1326 return NULL;
1327 }
1328
1329 UnicodeString&
getCustomID(const UnicodeString & id,UnicodeString & normalized,UErrorCode & status)1330 TimeZone::getCustomID(const UnicodeString& id, UnicodeString& normalized, UErrorCode& status) {
1331 normalized.remove();
1332 if (U_FAILURE(status)) {
1333 return normalized;
1334 }
1335 int32_t sign, hour, min, sec;
1336 if (parseCustomID(id, sign, hour, min, sec)) {
1337 formatCustomID(hour, min, sec, (sign < 0), normalized);
1338 }
1339 return normalized;
1340 }
1341
1342 UBool
parseCustomID(const UnicodeString & id,int32_t & sign,int32_t & hour,int32_t & min,int32_t & sec)1343 TimeZone::parseCustomID(const UnicodeString& id, int32_t& sign,
1344 int32_t& hour, int32_t& min, int32_t& sec) {
1345 static const int32_t kParseFailed = -99999;
1346
1347 NumberFormat* numberFormat = 0;
1348 UnicodeString idUppercase = id;
1349 idUppercase.toUpper("");
1350
1351 if (id.length() > GMT_ID_LENGTH &&
1352 idUppercase.startsWith(GMT_ID, GMT_ID_LENGTH))
1353 {
1354 ParsePosition pos(GMT_ID_LENGTH);
1355 sign = 1;
1356 hour = 0;
1357 min = 0;
1358 sec = 0;
1359
1360 if (id[pos.getIndex()] == MINUS /*'-'*/) {
1361 sign = -1;
1362 } else if (id[pos.getIndex()] != PLUS /*'+'*/) {
1363 return FALSE;
1364 }
1365 pos.setIndex(pos.getIndex() + 1);
1366
1367 UErrorCode success = U_ZERO_ERROR;
1368 numberFormat = NumberFormat::createInstance(success);
1369 if(U_FAILURE(success)){
1370 return FALSE;
1371 }
1372 numberFormat->setParseIntegerOnly(TRUE);
1373 //numberFormat->setLenient(TRUE); // TODO: May need to set this, depends on latest timezone parsing
1374
1375 // Look for either hh:mm, hhmm, or hh
1376 int32_t start = pos.getIndex();
1377 Formattable n(kParseFailed);
1378 numberFormat->parse(id, n, pos);
1379 if (pos.getIndex() == start) {
1380 delete numberFormat;
1381 return FALSE;
1382 }
1383 hour = n.getLong();
1384
1385 if (pos.getIndex() < id.length()) {
1386 if (pos.getIndex() - start > 2
1387 || id[pos.getIndex()] != COLON) {
1388 delete numberFormat;
1389 return FALSE;
1390 }
1391 // hh:mm
1392 pos.setIndex(pos.getIndex() + 1);
1393 int32_t oldPos = pos.getIndex();
1394 n.setLong(kParseFailed);
1395 numberFormat->parse(id, n, pos);
1396 if ((pos.getIndex() - oldPos) != 2) {
1397 // must be 2 digits
1398 delete numberFormat;
1399 return FALSE;
1400 }
1401 min = n.getLong();
1402 if (pos.getIndex() < id.length()) {
1403 if (id[pos.getIndex()] != COLON) {
1404 delete numberFormat;
1405 return FALSE;
1406 }
1407 // [:ss]
1408 pos.setIndex(pos.getIndex() + 1);
1409 oldPos = pos.getIndex();
1410 n.setLong(kParseFailed);
1411 numberFormat->parse(id, n, pos);
1412 if (pos.getIndex() != id.length()
1413 || (pos.getIndex() - oldPos) != 2) {
1414 delete numberFormat;
1415 return FALSE;
1416 }
1417 sec = n.getLong();
1418 }
1419 } else {
1420 // Supported formats are below -
1421 //
1422 // HHmmss
1423 // Hmmss
1424 // HHmm
1425 // Hmm
1426 // HH
1427 // H
1428
1429 int32_t length = pos.getIndex() - start;
1430 if (length <= 0 || 6 < length) {
1431 // invalid length
1432 delete numberFormat;
1433 return FALSE;
1434 }
1435 switch (length) {
1436 case 1:
1437 case 2:
1438 // already set to hour
1439 break;
1440 case 3:
1441 case 4:
1442 min = hour % 100;
1443 hour /= 100;
1444 break;
1445 case 5:
1446 case 6:
1447 sec = hour % 100;
1448 min = (hour/100) % 100;
1449 hour /= 10000;
1450 break;
1451 }
1452 }
1453
1454 delete numberFormat;
1455
1456 if (hour > kMAX_CUSTOM_HOUR || min > kMAX_CUSTOM_MIN || sec > kMAX_CUSTOM_SEC) {
1457 return FALSE;
1458 }
1459 return TRUE;
1460 }
1461 return FALSE;
1462 }
1463
1464 UnicodeString&
formatCustomID(int32_t hour,int32_t min,int32_t sec,UBool negative,UnicodeString & id)1465 TimeZone::formatCustomID(int32_t hour, int32_t min, int32_t sec,
1466 UBool negative, UnicodeString& id) {
1467 // Create time zone ID - GMT[+|-]hhmm[ss]
1468 id.setTo(GMT_ID, GMT_ID_LENGTH);
1469 if (hour | min | sec) {
1470 if (negative) {
1471 id += (UChar)MINUS;
1472 } else {
1473 id += (UChar)PLUS;
1474 }
1475
1476 if (hour < 10) {
1477 id += (UChar)ZERO_DIGIT;
1478 } else {
1479 id += (UChar)(ZERO_DIGIT + hour/10);
1480 }
1481 id += (UChar)(ZERO_DIGIT + hour%10);
1482 id += (UChar)COLON;
1483 if (min < 10) {
1484 id += (UChar)ZERO_DIGIT;
1485 } else {
1486 id += (UChar)(ZERO_DIGIT + min/10);
1487 }
1488 id += (UChar)(ZERO_DIGIT + min%10);
1489
1490 if (sec) {
1491 id += (UChar)COLON;
1492 if (sec < 10) {
1493 id += (UChar)ZERO_DIGIT;
1494 } else {
1495 id += (UChar)(ZERO_DIGIT + sec/10);
1496 }
1497 id += (UChar)(ZERO_DIGIT + sec%10);
1498 }
1499 }
1500 return id;
1501 }
1502
1503
1504 UBool
hasSameRules(const TimeZone & other) const1505 TimeZone::hasSameRules(const TimeZone& other) const
1506 {
1507 return (getRawOffset() == other.getRawOffset() &&
1508 useDaylightTime() == other.useDaylightTime());
1509 }
1510
1511 const char*
getTZDataVersion(UErrorCode & status)1512 TimeZone::getTZDataVersion(UErrorCode& status)
1513 {
1514 /* This is here to prevent race conditions. */
1515 UBool needsInit;
1516 UMTX_CHECK(&LOCK, !TZDataVersionInitialized, needsInit);
1517 if (needsInit) {
1518 int32_t len = 0;
1519 UResourceBundle *bundle = ures_openDirect(NULL, kZONEINFO, &status);
1520 const UChar *tzver = ures_getStringByKey(bundle, kTZVERSION,
1521 &len, &status);
1522
1523 if (U_SUCCESS(status)) {
1524 if (len >= (int32_t)sizeof(TZDATA_VERSION)) {
1525 // Ensure that there is always space for a trailing nul in TZDATA_VERSION
1526 len = sizeof(TZDATA_VERSION) - 1;
1527 }
1528 umtx_lock(&LOCK);
1529 if (!TZDataVersionInitialized) {
1530 u_UCharsToChars(tzver, TZDATA_VERSION, len);
1531 TZDataVersionInitialized = TRUE;
1532 }
1533 umtx_unlock(&LOCK);
1534 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
1535 }
1536
1537 ures_close(bundle);
1538 }
1539 if (U_FAILURE(status)) {
1540 return NULL;
1541 }
1542 return (const char*)TZDATA_VERSION;
1543 }
1544
1545 UnicodeString&
getCanonicalID(const UnicodeString & id,UnicodeString & canonicalID,UErrorCode & status)1546 TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UErrorCode& status)
1547 {
1548 UBool isSystemID = FALSE;
1549 return getCanonicalID(id, canonicalID, isSystemID, status);
1550 }
1551
1552 UnicodeString&
getCanonicalID(const UnicodeString & id,UnicodeString & canonicalID,UBool & isSystemID,UErrorCode & status)1553 TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UBool& isSystemID,
1554 UErrorCode& status)
1555 {
1556 canonicalID.remove();
1557 isSystemID = FALSE;
1558 if (U_FAILURE(status)) {
1559 return canonicalID;
1560 }
1561 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) == 0) {
1562 // special case - Etc/Unknown is a canonical ID, but not system ID
1563 canonicalID.fastCopyFrom(id);
1564 isSystemID = FALSE;
1565 } else {
1566 ZoneMeta::getCanonicalCLDRID(id, canonicalID, status);
1567 if (U_SUCCESS(status)) {
1568 isSystemID = TRUE;
1569 } else {
1570 // Not a system ID
1571 status = U_ZERO_ERROR;
1572 getCustomID(id, canonicalID, status);
1573 }
1574 }
1575 return canonicalID;
1576 }
1577
1578 U_NAMESPACE_END
1579
1580 #endif /* #if !UCONFIG_NO_FORMATTING */
1581
1582 //eof
1583