1 /*
2 *******************************************************************************
3 * Copyright (C) 1997-2015, 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 "uassert.h"
43 #include "ustr_imp.h"
44
45 #ifdef U_DEBUG_TZ
46 # include <stdio.h>
47 # include "uresimp.h" // for debugging
48
debug_tz_loc(const char * f,int32_t l)49 static void debug_tz_loc(const char *f, int32_t l)
50 {
51 fprintf(stderr, "%s:%d: ", f, l);
52 }
53
debug_tz_msg(const char * pat,...)54 static void debug_tz_msg(const char *pat, ...)
55 {
56 va_list ap;
57 va_start(ap, pat);
58 vfprintf(stderr, pat, ap);
59 fflush(stderr);
60 }
61 static char gStrBuf[256];
62 #define U_DEBUG_TZ_STR(x) u_austrncpy(gStrBuf,x,sizeof(gStrBuf)-1)
63 // must use double parens, i.e.: U_DEBUG_TZ_MSG(("four is: %d",4));
64 #define U_DEBUG_TZ_MSG(x) {debug_tz_loc(__FILE__,__LINE__);debug_tz_msg x;}
65 #else
66 #define U_DEBUG_TZ_MSG(x)
67 #endif
68
69 #if !UCONFIG_NO_FORMATTING
70
71 #include "unicode/simpletz.h"
72 #include "unicode/calendar.h"
73 #include "unicode/gregocal.h"
74 #include "unicode/ures.h"
75 #include "unicode/tzfmt.h"
76 #include "unicode/numfmt.h"
77 #include "gregoimp.h"
78 #include "uresimp.h" // struct UResourceBundle
79 #include "olsontz.h"
80 #include "mutex.h"
81 #include "unicode/udata.h"
82 #include "ucln_in.h"
83 #include "cstring.h"
84 #include "cmemory.h"
85 #include "unicode/strenum.h"
86 #include "uassert.h"
87 #include "zonemeta.h"
88
89 #define kZONEINFO "zoneinfo64"
90 #define kREGIONS "Regions"
91 #define kZONES "Zones"
92 #define kRULES "Rules"
93 #define kNAMES "Names"
94 #define kTZVERSION "TZVersion"
95 #define kLINKS "links"
96 #define kMAX_CUSTOM_HOUR 23
97 #define kMAX_CUSTOM_MIN 59
98 #define kMAX_CUSTOM_SEC 59
99 #define MINUS 0x002D
100 #define PLUS 0x002B
101 #define ZERO_DIGIT 0x0030
102 #define COLON 0x003A
103
104 // Static data and constants
105
106 static const UChar WORLD[] = {0x30, 0x30, 0x31, 0x00}; /* "001" */
107
108 static const UChar GMT_ID[] = {0x47, 0x4D, 0x54, 0x00}; /* "GMT" */
109 static const UChar UNKNOWN_ZONE_ID[] = {0x45, 0x74, 0x63, 0x2F, 0x55, 0x6E, 0x6B, 0x6E, 0x6F, 0x77, 0x6E, 0x00}; /* "Etc/Unknown" */
110 static const int32_t GMT_ID_LENGTH = 3;
111 static const int32_t UNKNOWN_ZONE_ID_LENGTH = 11;
112
113 static icu::TimeZone* DEFAULT_ZONE = NULL;
114 static icu::UInitOnce gDefaultZoneInitOnce = U_INITONCE_INITIALIZER;
115
116 static icu::TimeZone* _GMT = NULL;
117 static icu::TimeZone* _UNKNOWN_ZONE = NULL;
118 static icu::UInitOnce gStaticZonesInitOnce = U_INITONCE_INITIALIZER;
119
120 static char TZDATA_VERSION[16];
121 static icu::UInitOnce gTZDataVersionInitOnce = U_INITONCE_INITIALIZER;
122
123 static int32_t* MAP_SYSTEM_ZONES = NULL;
124 static int32_t* MAP_CANONICAL_SYSTEM_ZONES = NULL;
125 static int32_t* MAP_CANONICAL_SYSTEM_LOCATION_ZONES = NULL;
126
127 static int32_t LEN_SYSTEM_ZONES = 0;
128 static int32_t LEN_CANONICAL_SYSTEM_ZONES = 0;
129 static int32_t LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
130
131 static icu::UInitOnce gSystemZonesInitOnce = U_INITONCE_INITIALIZER;
132 static icu::UInitOnce gCanonicalZonesInitOnce = U_INITONCE_INITIALIZER;
133 static icu::UInitOnce gCanonicalLocationZonesInitOnce = U_INITONCE_INITIALIZER;
134
135 U_CDECL_BEGIN
timeZone_cleanup(void)136 static UBool U_CALLCONV timeZone_cleanup(void)
137 {
138 U_NAMESPACE_USE
139 delete DEFAULT_ZONE;
140 DEFAULT_ZONE = NULL;
141 gDefaultZoneInitOnce.reset();
142
143 delete _GMT;
144 _GMT = NULL;
145 delete _UNKNOWN_ZONE;
146 _UNKNOWN_ZONE = NULL;
147 gStaticZonesInitOnce.reset();
148
149 uprv_memset(TZDATA_VERSION, 0, sizeof(TZDATA_VERSION));
150 gTZDataVersionInitOnce.reset();
151
152 LEN_SYSTEM_ZONES = 0;
153 uprv_free(MAP_SYSTEM_ZONES);
154 MAP_SYSTEM_ZONES = 0;
155 gSystemZonesInitOnce.reset();
156
157 LEN_CANONICAL_SYSTEM_ZONES = 0;
158 uprv_free(MAP_CANONICAL_SYSTEM_ZONES);
159 MAP_CANONICAL_SYSTEM_ZONES = 0;
160 gCanonicalZonesInitOnce.reset();
161
162 LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
163 uprv_free(MAP_CANONICAL_SYSTEM_LOCATION_ZONES);
164 MAP_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
165 gCanonicalLocationZonesInitOnce.reset();
166
167 return TRUE;
168 }
169 U_CDECL_END
170
171 U_NAMESPACE_BEGIN
172
findInStringArray(UResourceBundle * array,const UnicodeString & id,UErrorCode & status)173 static int32_t findInStringArray(UResourceBundle* array, const UnicodeString& id, UErrorCode &status)
174 {
175 UnicodeString copy;
176 const UChar *u;
177 int32_t len;
178
179 int32_t start = 0;
180 int32_t limit = ures_getSize(array);
181 int32_t mid;
182 int32_t lastMid = INT32_MAX;
183 if(U_FAILURE(status) || (limit < 1)) {
184 return -1;
185 }
186 U_DEBUG_TZ_MSG(("fisa: Looking for %s, between %d and %d\n", U_DEBUG_TZ_STR(UnicodeString(id).getTerminatedBuffer()), start, limit));
187
188 for (;;) {
189 mid = (int32_t)((start + limit) / 2);
190 if (lastMid == mid) { /* Have we moved? */
191 break; /* We haven't moved, and it wasn't found. */
192 }
193 lastMid = mid;
194 u = ures_getStringByIndex(array, mid, &len, &status);
195 if (U_FAILURE(status)) {
196 break;
197 }
198 U_DEBUG_TZ_MSG(("tz: compare to %s, %d .. [%d] .. %d\n", U_DEBUG_TZ_STR(u), start, mid, limit));
199 copy.setTo(TRUE, u, len);
200 int r = id.compare(copy);
201 if(r==0) {
202 U_DEBUG_TZ_MSG(("fisa: found at %d\n", mid));
203 return mid;
204 } else if(r<0) {
205 limit = mid;
206 } else {
207 start = mid;
208 }
209 }
210 U_DEBUG_TZ_MSG(("fisa: not found\n"));
211 return -1;
212 }
213
214 /**
215 * Fetch a specific zone by name. Replaces the getByKey call.
216 * @param top Top timezone resource
217 * @param id Time zone ID
218 * @param oldbundle Bundle for reuse (or NULL). see 'ures_open()'
219 * @return the zone's bundle if found, or undefined if error. Reuses oldbundle.
220 */
getZoneByName(const UResourceBundle * top,const UnicodeString & id,UResourceBundle * oldbundle,UErrorCode & status)221 static UResourceBundle* getZoneByName(const UResourceBundle* top, const UnicodeString& id, UResourceBundle *oldbundle, UErrorCode& status) {
222 // load the Rules object
223 UResourceBundle *tmp = ures_getByKey(top, kNAMES, NULL, &status);
224
225 // search for the string
226 int32_t idx = findInStringArray(tmp, id, status);
227
228 if((idx == -1) && U_SUCCESS(status)) {
229 // not found
230 status = U_MISSING_RESOURCE_ERROR;
231 //ures_close(oldbundle);
232 //oldbundle = NULL;
233 } else {
234 U_DEBUG_TZ_MSG(("gzbn: oldbundle= size %d, type %d, %s\n", ures_getSize(tmp), ures_getType(tmp), u_errorName(status)));
235 tmp = ures_getByKey(top, kZONES, tmp, &status); // get Zones object from top
236 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)));
237 oldbundle = ures_getByIndex(tmp, idx, oldbundle, &status); // get nth Zone object
238 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)));
239 }
240 ures_close(tmp);
241 if(U_FAILURE(status)) {
242 //ures_close(oldbundle);
243 return NULL;
244 } else {
245 return oldbundle;
246 }
247 }
248
249
loadRule(const UResourceBundle * top,const UnicodeString & ruleid,UResourceBundle * oldbundle,UErrorCode & status)250 UResourceBundle* TimeZone::loadRule(const UResourceBundle* top, const UnicodeString& ruleid, UResourceBundle* oldbundle, UErrorCode& status) {
251 char key[64];
252 ruleid.extract(0, sizeof(key)-1, key, (int32_t)sizeof(key)-1, US_INV);
253 U_DEBUG_TZ_MSG(("loadRule(%s)\n", key));
254 UResourceBundle *r = ures_getByKey(top, kRULES, oldbundle, &status);
255 U_DEBUG_TZ_MSG(("loadRule(%s) -> kRULES [%s]\n", key, u_errorName(status)));
256 r = ures_getByKey(r, key, r, &status);
257 U_DEBUG_TZ_MSG(("loadRule(%s) -> item [%s]\n", key, u_errorName(status)));
258 return r;
259 }
260
261 /**
262 * Given an ID, open the appropriate resource for the given time zone.
263 * Dereference aliases if necessary.
264 * @param id zone id
265 * @param res resource, which must be ready for use (initialized but not open)
266 * @param ec input-output error code
267 * @return top-level resource bundle
268 */
openOlsonResource(const UnicodeString & id,UResourceBundle & res,UErrorCode & ec)269 static UResourceBundle* openOlsonResource(const UnicodeString& id,
270 UResourceBundle& res,
271 UErrorCode& ec)
272 {
273 #if U_DEBUG_TZ
274 char buf[128];
275 id.extract(0, sizeof(buf)-1, buf, sizeof(buf), "");
276 #endif
277 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
278 U_DEBUG_TZ_MSG(("pre: res sz=%d\n", ures_getSize(&res)));
279 /* &res = */ getZoneByName(top, id, &res, ec);
280 // Dereference if this is an alias. Docs say result should be 1
281 // but it is 0 in 2.8 (?).
282 U_DEBUG_TZ_MSG(("Loading zone '%s' (%s, size %d) - %s\n", buf, ures_getKey((UResourceBundle*)&res), ures_getSize(&res), u_errorName(ec)));
283 if (ures_getType(&res) == URES_INT) {
284 int32_t deref = ures_getInt(&res, &ec) + 0;
285 U_DEBUG_TZ_MSG(("getInt: %s - type is %d\n", u_errorName(ec), ures_getType(&res)));
286 UResourceBundle *ares = ures_getByKey(top, kZONES, NULL, &ec); // dereference Zones section
287 ures_getByIndex(ares, deref, &res, &ec);
288 ures_close(ares);
289 U_DEBUG_TZ_MSG(("alias to #%d (%s) - %s\n", deref, "??", u_errorName(ec)));
290 } else {
291 U_DEBUG_TZ_MSG(("not an alias - size %d\n", ures_getSize(&res)));
292 }
293 U_DEBUG_TZ_MSG(("%s - final status is %s\n", buf, u_errorName(ec)));
294 return top;
295 }
296
297 // -------------------------------------
298
299 namespace {
300
initStaticTimeZones()301 void U_CALLCONV initStaticTimeZones() {
302 // Initialize _GMT independently of other static data; it should
303 // be valid even if we can't load the time zone UDataMemory.
304 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
305 _UNKNOWN_ZONE = new SimpleTimeZone(0, UnicodeString(TRUE, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH));
306 _GMT = new SimpleTimeZone(0, UnicodeString(TRUE, GMT_ID, GMT_ID_LENGTH));
307 }
308
309 } // anonymous namespace
310
311 const TimeZone& U_EXPORT2
getUnknown()312 TimeZone::getUnknown()
313 {
314 umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
315 return *_UNKNOWN_ZONE;
316 }
317
318 const TimeZone* U_EXPORT2
getGMT(void)319 TimeZone::getGMT(void)
320 {
321 umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
322 return _GMT;
323 }
324
325 // *****************************************************************************
326 // class TimeZone
327 // *****************************************************************************
328
UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)329 UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)
330
331 TimeZone::TimeZone()
332 : UObject(), fID()
333 {
334 }
335
336 // -------------------------------------
337
TimeZone(const UnicodeString & id)338 TimeZone::TimeZone(const UnicodeString &id)
339 : UObject(), fID(id)
340 {
341 }
342
343 // -------------------------------------
344
~TimeZone()345 TimeZone::~TimeZone()
346 {
347 }
348
349 // -------------------------------------
350
TimeZone(const TimeZone & source)351 TimeZone::TimeZone(const TimeZone &source)
352 : UObject(source), fID(source.fID)
353 {
354 }
355
356 // -------------------------------------
357
358 TimeZone &
operator =(const TimeZone & right)359 TimeZone::operator=(const TimeZone &right)
360 {
361 if (this != &right) fID = right.fID;
362 return *this;
363 }
364
365 // -------------------------------------
366
367 UBool
operator ==(const TimeZone & that) const368 TimeZone::operator==(const TimeZone& that) const
369 {
370 return typeid(*this) == typeid(that) &&
371 fID == that.fID;
372 }
373
374 // -------------------------------------
375
376 namespace {
377 TimeZone*
createSystemTimeZone(const UnicodeString & id,UErrorCode & ec)378 createSystemTimeZone(const UnicodeString& id, UErrorCode& ec) {
379 if (U_FAILURE(ec)) {
380 return NULL;
381 }
382 TimeZone* z = 0;
383 UResourceBundle res;
384 ures_initStackObject(&res);
385 U_DEBUG_TZ_MSG(("pre-err=%s\n", u_errorName(ec)));
386 UResourceBundle *top = openOlsonResource(id, res, ec);
387 U_DEBUG_TZ_MSG(("post-err=%s\n", u_errorName(ec)));
388 if (U_SUCCESS(ec)) {
389 z = new OlsonTimeZone(top, &res, id, ec);
390 if (z == NULL) {
391 U_DEBUG_TZ_MSG(("cstz: olson time zone failed to initialize - err %s\n", u_errorName(ec)));
392 }
393 }
394 ures_close(&res);
395 ures_close(top);
396 if (U_FAILURE(ec)) {
397 U_DEBUG_TZ_MSG(("cstz: failed to create, err %s\n", u_errorName(ec)));
398 delete z;
399 z = 0;
400 }
401 return z;
402 }
403
404 /**
405 * Lookup the given name in our system zone table. If found,
406 * instantiate a new zone of that name and return it. If not
407 * found, return 0.
408 */
409 TimeZone*
createSystemTimeZone(const UnicodeString & id)410 createSystemTimeZone(const UnicodeString& id) {
411 UErrorCode ec = U_ZERO_ERROR;
412 return createSystemTimeZone(id, ec);
413 }
414
415 }
416
417 TimeZone* U_EXPORT2
createTimeZone(const UnicodeString & ID)418 TimeZone::createTimeZone(const UnicodeString& ID)
419 {
420 /* We first try to lookup the zone ID in our system list. If this
421 * fails, we try to parse it as a custom string GMT[+-]hh:mm. If
422 * all else fails, we return GMT, which is probably not what the
423 * user wants, but at least is a functioning TimeZone object.
424 *
425 * We cannot return NULL, because that would break compatibility
426 * with the JDK.
427 */
428 TimeZone* result = createSystemTimeZone(ID);
429
430 if (result == NULL) {
431 U_DEBUG_TZ_MSG(("failed to load system time zone with id - falling to custom"));
432 result = createCustomTimeZone(ID);
433 }
434 if (result == NULL) {
435 U_DEBUG_TZ_MSG(("failed to load time zone with id - falling to Etc/Unknown(GMT)"));
436 const TimeZone& unknown = getUnknown();
437 if (_UNKNOWN_ZONE == NULL) { // Cannot test (&unknown == NULL) because the
438 U_DEBUG_TZ_MSG(("failed to getUnknown()")); // behavior of NULL references is undefined.
439 } else {
440 result = unknown.clone();
441 }
442 }
443 return result;
444 }
445
446 // -------------------------------------
447
448 TimeZone* U_EXPORT2
detectHostTimeZone()449 TimeZone::detectHostTimeZone()
450 {
451 // We access system timezone data through TPlatformUtilities,
452 // including tzset(), timezone, and tzname[].
453 int32_t rawOffset = 0;
454 const char *hostID;
455
456 // First, try to create a system timezone, based
457 // on the string ID in tzname[0].
458
459 uprv_tzset(); // Initialize tz... system data
460
461 // Get the timezone ID from the host. This function should do
462 // any required host-specific remapping; e.g., on Windows this
463 // function maps the Date and Time control panel setting to an
464 // ICU timezone ID.
465 hostID = uprv_tzname(0);
466
467 // Invert sign because UNIX semantics are backwards
468 rawOffset = uprv_timezone() * -U_MILLIS_PER_SECOND;
469
470 TimeZone* hostZone = NULL;
471
472 /* Make sure that the string is NULL terminated to prevent BoundsChecker/Purify warnings. */
473 UnicodeString hostStrID(hostID, -1, US_INV);
474 hostStrID.append((UChar)0);
475 hostStrID.truncate(hostStrID.length()-1);
476 hostZone = createSystemTimeZone(hostStrID);
477
478 #if U_PLATFORM_USES_ONLY_WIN32_API
479 // hostID points to a heap-allocated location on Windows.
480 uprv_free(const_cast<char *>(hostID));
481 #endif
482
483 int32_t hostIDLen = hostStrID.length();
484 if (hostZone != NULL && rawOffset != hostZone->getRawOffset()
485 && (3 <= hostIDLen && hostIDLen <= 4))
486 {
487 // Uh oh. This probably wasn't a good id.
488 // It was probably an ambiguous abbreviation
489 delete hostZone;
490 hostZone = NULL;
491 }
492
493 // Construct a fixed standard zone with the host's ID
494 // and raw offset.
495 if (hostZone == NULL) {
496 hostZone = new SimpleTimeZone(rawOffset, hostStrID);
497 }
498
499 // If we _still_ don't have a time zone, use GMT.
500 //
501 // Note: This is extremely unlikely situation. If
502 // new SimpleTimeZone(...) above fails, the following
503 // code may also fail.
504 if (hostZone == NULL) {
505 const TimeZone* temptz = TimeZone::getGMT();
506 // If we can't use GMT, get out.
507 if (temptz == NULL) {
508 return NULL;
509 }
510 hostZone = temptz->clone();
511 }
512
513 return hostZone;
514 }
515
516 // -------------------------------------
517
518 /**
519 * Initialize DEFAULT_ZONE from the system default time zone.
520 * Upon return, DEFAULT_ZONE will not be NULL, unless operator new()
521 * returns NULL.
522 */
initDefault()523 static void U_CALLCONV initDefault()
524 {
525 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
526
527 // If setDefault() has already been called we can skip getting the
528 // default zone information from the system.
529 if (DEFAULT_ZONE != NULL) {
530 return;
531 }
532
533 // NOTE: this code is safely single threaded, being only
534 // run via umtx_initOnce().
535 //
536 // Some of the locale/timezone OS functions may not be thread safe,
537 //
538 // The operating system might actually use ICU to implement timezones.
539 // So we may have ICU calling ICU here, like on AIX.
540 // There shouldn't be a problem with this; initOnce does not hold a mutex
541 // while the init function is being run.
542
543 // The code detecting the host time zone was separated from this
544 // and implemented as TimeZone::detectHostTimeZone()
545
546 TimeZone *default_zone = TimeZone::detectHostTimeZone();
547
548 // The only way for DEFAULT_ZONE to be non-null at this point is if the user
549 // made a thread-unsafe call to setDefault() or adoptDefault() in another
550 // thread while this thread was doing something that required getting the default.
551 U_ASSERT(DEFAULT_ZONE == NULL);
552
553 DEFAULT_ZONE = default_zone;
554 }
555
556 // -------------------------------------
557
558 TimeZone* U_EXPORT2
createDefault()559 TimeZone::createDefault()
560 {
561 umtx_initOnce(gDefaultZoneInitOnce, initDefault);
562 return (DEFAULT_ZONE != NULL) ? DEFAULT_ZONE->clone() : NULL;
563 }
564
565 // -------------------------------------
566
567 void U_EXPORT2
adoptDefault(TimeZone * zone)568 TimeZone::adoptDefault(TimeZone* zone)
569 {
570 if (zone != NULL)
571 {
572 TimeZone *old = DEFAULT_ZONE;
573 DEFAULT_ZONE = zone;
574 delete old;
575 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
576 }
577 }
578 // -------------------------------------
579
580 void U_EXPORT2
setDefault(const TimeZone & zone)581 TimeZone::setDefault(const TimeZone& zone)
582 {
583 adoptDefault(zone.clone());
584 }
585
586 //----------------------------------------------------------------------
587
588
initMap(USystemTimeZoneType type,UErrorCode & ec)589 static void U_CALLCONV initMap(USystemTimeZoneType type, UErrorCode& ec) {
590 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
591
592 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
593 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
594 if (U_SUCCESS(ec)) {
595 int32_t size = ures_getSize(res);
596 int32_t *m = (int32_t *)uprv_malloc(size * sizeof(int32_t));
597 if (m == NULL) {
598 ec = U_MEMORY_ALLOCATION_ERROR;
599 } else {
600 int32_t numEntries = 0;
601 for (int32_t i = 0; i < size; i++) {
602 UnicodeString id = ures_getUnicodeStringByIndex(res, i, &ec);
603 if (U_FAILURE(ec)) {
604 break;
605 }
606 if (0 == id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH)) {
607 // exclude Etc/Unknown
608 continue;
609 }
610 if (type == UCAL_ZONE_TYPE_CANONICAL || type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
611 UnicodeString canonicalID;
612 ZoneMeta::getCanonicalCLDRID(id, canonicalID, ec);
613 if (U_FAILURE(ec)) {
614 break;
615 }
616 if (canonicalID != id) {
617 // exclude aliases
618 continue;
619 }
620 }
621 if (type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
622 const UChar *region = TimeZone::getRegion(id, ec);
623 if (U_FAILURE(ec)) {
624 break;
625 }
626 if (u_strcmp(region, WORLD) == 0) {
627 // exclude non-location ("001")
628 continue;
629 }
630 }
631 m[numEntries++] = i;
632 }
633 if (U_SUCCESS(ec)) {
634 int32_t *tmp = m;
635 m = (int32_t *)uprv_realloc(tmp, numEntries * sizeof(int32_t));
636 if (m == NULL) {
637 // realloc failed.. use the original one even it has unused
638 // area at the end
639 m = tmp;
640 }
641
642 switch(type) {
643 case UCAL_ZONE_TYPE_ANY:
644 U_ASSERT(MAP_SYSTEM_ZONES == NULL);
645 MAP_SYSTEM_ZONES = m;
646 LEN_SYSTEM_ZONES = numEntries;
647 break;
648 case UCAL_ZONE_TYPE_CANONICAL:
649 U_ASSERT(MAP_CANONICAL_SYSTEM_ZONES == NULL);
650 MAP_CANONICAL_SYSTEM_ZONES = m;
651 LEN_CANONICAL_SYSTEM_ZONES = numEntries;
652 break;
653 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
654 U_ASSERT(MAP_CANONICAL_SYSTEM_LOCATION_ZONES == NULL);
655 MAP_CANONICAL_SYSTEM_LOCATION_ZONES = m;
656 LEN_CANONICAL_SYSTEM_LOCATION_ZONES = numEntries;
657 break;
658 }
659 }
660 }
661 }
662 ures_close(res);
663 }
664
665
666 /**
667 * This is the default implementation for subclasses that do not
668 * override this method. This implementation calls through to the
669 * 8-argument getOffset() method after suitable computations, and
670 * correctly adjusts GMT millis to local millis when necessary.
671 */
getOffset(UDate date,UBool local,int32_t & rawOffset,int32_t & dstOffset,UErrorCode & ec) const672 void TimeZone::getOffset(UDate date, UBool local, int32_t& rawOffset,
673 int32_t& dstOffset, UErrorCode& ec) const {
674 if (U_FAILURE(ec)) {
675 return;
676 }
677
678 rawOffset = getRawOffset();
679 if (!local) {
680 date += rawOffset; // now in local standard millis
681 }
682
683 // When local == TRUE, date might not be in local standard
684 // millis. getOffset taking 7 parameters used here assume
685 // the given time in day is local standard time.
686 // At STD->DST transition, there is a range of time which
687 // does not exist. When 'date' is in this time range
688 // (and local == TRUE), this method interprets the specified
689 // local time as DST. At DST->STD transition, there is a
690 // range of time which occurs twice. In this case, this
691 // method interprets the specified local time as STD.
692 // To support the behavior above, we need to call getOffset
693 // (with 7 args) twice when local == true and DST is
694 // detected in the initial call.
695 for (int32_t pass=0; ; ++pass) {
696 int32_t year, month, dom, dow;
697 double day = uprv_floor(date / U_MILLIS_PER_DAY);
698 int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
699
700 Grego::dayToFields(day, year, month, dom, dow);
701
702 dstOffset = getOffset(GregorianCalendar::AD, year, month, dom,
703 (uint8_t) dow, millis,
704 Grego::monthLength(year, month),
705 ec) - rawOffset;
706
707 // Recompute if local==TRUE, dstOffset!=0.
708 if (pass!=0 || !local || dstOffset == 0) {
709 break;
710 }
711 // adjust to local standard millis
712 date -= dstOffset;
713 }
714 }
715
716 // -------------------------------------
717
718 // New available IDs API as of ICU 2.4. Uses StringEnumeration API.
719
720 class TZEnumeration : public StringEnumeration {
721 private:
722
723 // Map into to zones. Our results are zone[map[i]] for
724 // i=0..len-1, where zone[i] is the i-th Olson zone. If map==NULL
725 // then our results are zone[i] for i=0..len-1. Len will be zero
726 // if the zone data could not be loaded.
727 int32_t* map;
728 int32_t* localMap;
729 int32_t len;
730 int32_t pos;
731
TZEnumeration(int32_t * mapData,int32_t mapLen,UBool adoptMapData)732 TZEnumeration(int32_t* mapData, int32_t mapLen, UBool adoptMapData) : pos(0) {
733 map = mapData;
734 localMap = adoptMapData ? mapData : NULL;
735 len = mapLen;
736 }
737
getID(int32_t i)738 UBool getID(int32_t i) {
739 UErrorCode ec = U_ZERO_ERROR;
740 int32_t idLen = 0;
741 const UChar* id = NULL;
742 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
743 top = ures_getByKey(top, kNAMES, top, &ec); // dereference Zones section
744 id = ures_getStringByIndex(top, i, &idLen, &ec);
745 if(U_FAILURE(ec)) {
746 unistr.truncate(0);
747 }
748 else {
749 unistr.fastCopyFrom(UnicodeString(TRUE, id, idLen));
750 }
751 ures_close(top);
752 return U_SUCCESS(ec);
753 }
754
getMap(USystemTimeZoneType type,int32_t & len,UErrorCode & ec)755 static int32_t* getMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) {
756 len = 0;
757 if (U_FAILURE(ec)) {
758 return NULL;
759 }
760 int32_t* m = NULL;
761 switch (type) {
762 case UCAL_ZONE_TYPE_ANY:
763 umtx_initOnce(gSystemZonesInitOnce, &initMap, type, ec);
764 m = MAP_SYSTEM_ZONES;
765 len = LEN_SYSTEM_ZONES;
766 break;
767 case UCAL_ZONE_TYPE_CANONICAL:
768 umtx_initOnce(gCanonicalZonesInitOnce, &initMap, type, ec);
769 m = MAP_CANONICAL_SYSTEM_ZONES;
770 len = LEN_CANONICAL_SYSTEM_ZONES;
771 break;
772 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
773 umtx_initOnce(gCanonicalLocationZonesInitOnce, &initMap, type, ec);
774 m = MAP_CANONICAL_SYSTEM_LOCATION_ZONES;
775 len = LEN_CANONICAL_SYSTEM_LOCATION_ZONES;
776 break;
777 default:
778 ec = U_ILLEGAL_ARGUMENT_ERROR;
779 m = NULL;
780 len = 0;
781 break;
782 }
783 return m;
784 }
785
786 public:
787
788 #define DEFAULT_FILTERED_MAP_SIZE 8
789 #define MAP_INCREMENT_SIZE 8
790
create(USystemTimeZoneType type,const char * region,const int32_t * rawOffset,UErrorCode & ec)791 static TZEnumeration* create(USystemTimeZoneType type, const char* region, const int32_t* rawOffset, UErrorCode& ec) {
792 if (U_FAILURE(ec)) {
793 return NULL;
794 }
795
796 int32_t baseLen;
797 int32_t *baseMap = getMap(type, baseLen, ec);
798
799 if (U_FAILURE(ec)) {
800 return NULL;
801 }
802
803 // If any additional conditions are available,
804 // create instance local map filtered by the conditions.
805
806 int32_t *filteredMap = NULL;
807 int32_t numEntries = 0;
808
809 if (region != NULL || rawOffset != NULL) {
810 int32_t filteredMapSize = DEFAULT_FILTERED_MAP_SIZE;
811 filteredMap = (int32_t *)uprv_malloc(filteredMapSize * sizeof(int32_t));
812 if (filteredMap == NULL) {
813 ec = U_MEMORY_ALLOCATION_ERROR;
814 return NULL;
815 }
816
817 // Walk through the base map
818 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
819 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
820 for (int32_t i = 0; i < baseLen; i++) {
821 int32_t zidx = baseMap[i];
822 UnicodeString id = ures_getUnicodeStringByIndex(res, zidx, &ec);
823 if (U_FAILURE(ec)) {
824 break;
825 }
826 if (region != NULL) {
827 // Filter by region
828 char tzregion[4]; // max 3 letters + null term
829 TimeZone::getRegion(id, tzregion, sizeof(tzregion), ec);
830 if (U_FAILURE(ec)) {
831 break;
832 }
833 if (uprv_stricmp(tzregion, region) != 0) {
834 // region does not match
835 continue;
836 }
837 }
838 if (rawOffset != NULL) {
839 // Filter by raw offset
840 // Note: This is VERY inefficient
841 TimeZone *z = createSystemTimeZone(id, ec);
842 if (U_FAILURE(ec)) {
843 break;
844 }
845 int32_t tzoffset = z->getRawOffset();
846 delete z;
847
848 if (tzoffset != *rawOffset) {
849 continue;
850 }
851 }
852
853 if (filteredMapSize <= numEntries) {
854 filteredMapSize += MAP_INCREMENT_SIZE;
855 int32_t *tmp = (int32_t *)uprv_realloc(filteredMap, filteredMapSize * sizeof(int32_t));
856 if (tmp == NULL) {
857 ec = U_MEMORY_ALLOCATION_ERROR;
858 break;
859 } else {
860 filteredMap = tmp;
861 }
862 }
863
864 filteredMap[numEntries++] = zidx;
865 }
866
867 if (U_FAILURE(ec)) {
868 uprv_free(filteredMap);
869 filteredMap = NULL;
870 }
871
872 ures_close(res);
873 }
874
875 TZEnumeration *result = NULL;
876 if (U_SUCCESS(ec)) {
877 // Finally, create a new enumeration instance
878 if (filteredMap == NULL) {
879 result = new TZEnumeration(baseMap, baseLen, FALSE);
880 } else {
881 result = new TZEnumeration(filteredMap, numEntries, TRUE);
882 filteredMap = NULL;
883 }
884 if (result == NULL) {
885 ec = U_MEMORY_ALLOCATION_ERROR;
886 }
887 }
888
889 if (filteredMap != NULL) {
890 uprv_free(filteredMap);
891 }
892
893 return result;
894 }
895
TZEnumeration(const TZEnumeration & other)896 TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(NULL), localMap(NULL), len(0), pos(0) {
897 if (other.localMap != NULL) {
898 localMap = (int32_t *)uprv_malloc(other.len * sizeof(int32_t));
899 if (localMap != NULL) {
900 len = other.len;
901 uprv_memcpy(localMap, other.localMap, len * sizeof(int32_t));
902 pos = other.pos;
903 map = localMap;
904 } else {
905 len = 0;
906 pos = 0;
907 map = NULL;
908 }
909 } else {
910 map = other.map;
911 localMap = NULL;
912 len = other.len;
913 pos = other.pos;
914 }
915 }
916
917 virtual ~TZEnumeration();
918
clone() const919 virtual StringEnumeration *clone() const {
920 return new TZEnumeration(*this);
921 }
922
count(UErrorCode & status) const923 virtual int32_t count(UErrorCode& status) const {
924 return U_FAILURE(status) ? 0 : len;
925 }
926
snext(UErrorCode & status)927 virtual const UnicodeString* snext(UErrorCode& status) {
928 if (U_SUCCESS(status) && map != NULL && pos < len) {
929 getID(map[pos]);
930 ++pos;
931 return &unistr;
932 }
933 return 0;
934 }
935
reset(UErrorCode &)936 virtual void reset(UErrorCode& /*status*/) {
937 pos = 0;
938 }
939
940 public:
941 static UClassID U_EXPORT2 getStaticClassID(void);
942 virtual UClassID getDynamicClassID(void) const;
943 };
944
~TZEnumeration()945 TZEnumeration::~TZEnumeration() {
946 if (localMap != NULL) {
947 uprv_free(localMap);
948 }
949 }
950
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)951 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)
952
953 StringEnumeration* U_EXPORT2
954 TimeZone::createTimeZoneIDEnumeration(
955 USystemTimeZoneType zoneType,
956 const char* region,
957 const int32_t* rawOffset,
958 UErrorCode& ec) {
959 return TZEnumeration::create(zoneType, region, rawOffset, ec);
960 }
961
962 StringEnumeration* U_EXPORT2
createEnumeration()963 TimeZone::createEnumeration() {
964 UErrorCode ec = U_ZERO_ERROR;
965 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, NULL, ec);
966 }
967
968 StringEnumeration* U_EXPORT2
createEnumeration(int32_t rawOffset)969 TimeZone::createEnumeration(int32_t rawOffset) {
970 UErrorCode ec = U_ZERO_ERROR;
971 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, &rawOffset, ec);
972 }
973
974 StringEnumeration* U_EXPORT2
createEnumeration(const char * country)975 TimeZone::createEnumeration(const char* country) {
976 UErrorCode ec = U_ZERO_ERROR;
977 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, country, NULL, ec);
978 }
979
980 // ---------------------------------------
981
982 int32_t U_EXPORT2
countEquivalentIDs(const UnicodeString & id)983 TimeZone::countEquivalentIDs(const UnicodeString& id) {
984 int32_t result = 0;
985 UErrorCode ec = U_ZERO_ERROR;
986 UResourceBundle res;
987 ures_initStackObject(&res);
988 U_DEBUG_TZ_MSG(("countEquivalentIDs..\n"));
989 UResourceBundle *top = openOlsonResource(id, res, ec);
990 if (U_SUCCESS(ec)) {
991 UResourceBundle r;
992 ures_initStackObject(&r);
993 ures_getByKey(&res, kLINKS, &r, &ec);
994 ures_getIntVector(&r, &result, &ec);
995 ures_close(&r);
996 }
997 ures_close(&res);
998 ures_close(top);
999 return result;
1000 }
1001
1002 // ---------------------------------------
1003
1004 const UnicodeString U_EXPORT2
getEquivalentID(const UnicodeString & id,int32_t index)1005 TimeZone::getEquivalentID(const UnicodeString& id, int32_t index) {
1006 U_DEBUG_TZ_MSG(("gEI(%d)\n", index));
1007 UnicodeString result;
1008 UErrorCode ec = U_ZERO_ERROR;
1009 UResourceBundle res;
1010 ures_initStackObject(&res);
1011 UResourceBundle *top = openOlsonResource(id, res, ec);
1012 int32_t zone = -1;
1013 if (U_SUCCESS(ec)) {
1014 UResourceBundle r;
1015 ures_initStackObject(&r);
1016 int32_t size;
1017 ures_getByKey(&res, kLINKS, &r, &ec);
1018 const int32_t* v = ures_getIntVector(&r, &size, &ec);
1019 if (U_SUCCESS(ec)) {
1020 if (index >= 0 && index < size) {
1021 zone = v[index];
1022 }
1023 }
1024 ures_close(&r);
1025 }
1026 ures_close(&res);
1027 if (zone >= 0) {
1028 UResourceBundle *ares = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Zones section
1029 if (U_SUCCESS(ec)) {
1030 int32_t idLen = 0;
1031 const UChar* id = ures_getStringByIndex(ares, zone, &idLen, &ec);
1032 result.fastCopyFrom(UnicodeString(TRUE, id, idLen));
1033 U_DEBUG_TZ_MSG(("gei(%d) -> %d, len%d, %s\n", index, zone, result.length(), u_errorName(ec)));
1034 }
1035 ures_close(ares);
1036 }
1037 ures_close(top);
1038 #if defined(U_DEBUG_TZ)
1039 if(result.length() ==0) {
1040 U_DEBUG_TZ_MSG(("equiv [__, #%d] -> 0 (%s)\n", index, u_errorName(ec)));
1041 }
1042 #endif
1043 return result;
1044 }
1045
1046 // ---------------------------------------
1047
1048 // These methods are used by ZoneMeta class only.
1049
1050 const UChar*
findID(const UnicodeString & id)1051 TimeZone::findID(const UnicodeString& id) {
1052 const UChar *result = NULL;
1053 UErrorCode ec = U_ZERO_ERROR;
1054 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1055
1056 // resolve zone index by name
1057 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1058 int32_t idx = findInStringArray(names, id, ec);
1059 result = ures_getStringByIndex(names, idx, NULL, &ec);
1060 if (U_FAILURE(ec)) {
1061 result = NULL;
1062 }
1063 ures_close(names);
1064 ures_close(rb);
1065 return result;
1066 }
1067
1068
1069 const UChar*
dereferOlsonLink(const UnicodeString & id)1070 TimeZone::dereferOlsonLink(const UnicodeString& id) {
1071 const UChar *result = NULL;
1072 UErrorCode ec = U_ZERO_ERROR;
1073 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1074
1075 // resolve zone index by name
1076 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1077 int32_t idx = findInStringArray(names, id, ec);
1078 result = ures_getStringByIndex(names, idx, NULL, &ec);
1079
1080 // open the zone bundle by index
1081 ures_getByKey(rb, kZONES, rb, &ec);
1082 ures_getByIndex(rb, idx, rb, &ec);
1083
1084 if (U_SUCCESS(ec)) {
1085 if (ures_getType(rb) == URES_INT) {
1086 // this is a link - dereference the link
1087 int32_t deref = ures_getInt(rb, &ec);
1088 const UChar* tmp = ures_getStringByIndex(names, deref, NULL, &ec);
1089 if (U_SUCCESS(ec)) {
1090 result = tmp;
1091 }
1092 }
1093 }
1094
1095 ures_close(names);
1096 ures_close(rb);
1097
1098 return result;
1099 }
1100
1101 const UChar*
getRegion(const UnicodeString & id)1102 TimeZone::getRegion(const UnicodeString& id) {
1103 UErrorCode status = U_ZERO_ERROR;
1104 return getRegion(id, status);
1105 }
1106
1107 const UChar*
getRegion(const UnicodeString & id,UErrorCode & status)1108 TimeZone::getRegion(const UnicodeString& id, UErrorCode& status) {
1109 if (U_FAILURE(status)) {
1110 return NULL;
1111 }
1112 const UChar *result = NULL;
1113 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &status);
1114
1115 // resolve zone index by name
1116 UResourceBundle *res = ures_getByKey(rb, kNAMES, NULL, &status);
1117 int32_t idx = findInStringArray(res, id, status);
1118
1119 // get region mapping
1120 ures_getByKey(rb, kREGIONS, res, &status);
1121 const UChar *tmp = ures_getStringByIndex(res, idx, NULL, &status);
1122 if (U_SUCCESS(status)) {
1123 result = tmp;
1124 }
1125
1126 ures_close(res);
1127 ures_close(rb);
1128
1129 return result;
1130 }
1131
1132
1133 // ---------------------------------------
1134 int32_t
getRegion(const UnicodeString & id,char * region,int32_t capacity,UErrorCode & status)1135 TimeZone::getRegion(const UnicodeString& id, char *region, int32_t capacity, UErrorCode& status)
1136 {
1137 int32_t resultLen = 0;
1138 *region = 0;
1139 if (U_FAILURE(status)) {
1140 return 0;
1141 }
1142
1143 const UChar *uregion = NULL;
1144 // "Etc/Unknown" is not a system zone ID,
1145 // but in the zone data
1146 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) != 0) {
1147 uregion = getRegion(id);
1148 }
1149 if (uregion == NULL) {
1150 status = U_ILLEGAL_ARGUMENT_ERROR;
1151 return 0;
1152 }
1153 resultLen = u_strlen(uregion);
1154 // A region code is represented by invariant characters
1155 u_UCharsToChars(uregion, region, uprv_min(resultLen, capacity));
1156
1157 if (capacity < resultLen) {
1158 status = U_BUFFER_OVERFLOW_ERROR;
1159 return resultLen;
1160 }
1161
1162 return u_terminateChars(region, capacity, resultLen, &status);
1163 }
1164
1165 // ---------------------------------------
1166
1167
1168 UnicodeString&
getDisplayName(UnicodeString & result) const1169 TimeZone::getDisplayName(UnicodeString& result) const
1170 {
1171 return getDisplayName(FALSE,LONG,Locale::getDefault(), result);
1172 }
1173
1174 UnicodeString&
getDisplayName(const Locale & locale,UnicodeString & result) const1175 TimeZone::getDisplayName(const Locale& locale, UnicodeString& result) const
1176 {
1177 return getDisplayName(FALSE, LONG, locale, result);
1178 }
1179
1180 UnicodeString&
getDisplayName(UBool daylight,EDisplayType style,UnicodeString & result) const1181 TimeZone::getDisplayName(UBool daylight, EDisplayType style, UnicodeString& result) const
1182 {
1183 return getDisplayName(daylight,style, Locale::getDefault(), result);
1184 }
1185 //--------------------------------------
1186 int32_t
getDSTSavings() const1187 TimeZone::getDSTSavings()const {
1188 if (useDaylightTime()) {
1189 return 3600000;
1190 }
1191 return 0;
1192 }
1193 //---------------------------------------
1194 UnicodeString&
getDisplayName(UBool daylight,EDisplayType style,const Locale & locale,UnicodeString & result) const1195 TimeZone::getDisplayName(UBool daylight, EDisplayType style, const Locale& locale, UnicodeString& result) const
1196 {
1197 UErrorCode status = U_ZERO_ERROR;
1198 UDate date = Calendar::getNow();
1199 UTimeZoneFormatTimeType timeType;
1200 int32_t offset;
1201
1202 if (style == GENERIC_LOCATION || style == LONG_GENERIC || style == SHORT_GENERIC) {
1203 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1204 if (U_FAILURE(status)) {
1205 result.remove();
1206 return result;
1207 }
1208 // Generic format
1209 switch (style) {
1210 case GENERIC_LOCATION:
1211 tzfmt->format(UTZFMT_STYLE_GENERIC_LOCATION, *this, date, result, &timeType);
1212 break;
1213 case LONG_GENERIC:
1214 tzfmt->format(UTZFMT_STYLE_GENERIC_LONG, *this, date, result, &timeType);
1215 break;
1216 case SHORT_GENERIC:
1217 tzfmt->format(UTZFMT_STYLE_GENERIC_SHORT, *this, date, result, &timeType);
1218 break;
1219 default:
1220 U_ASSERT(FALSE);
1221 }
1222 // Generic format many use Localized GMT as the final fallback.
1223 // When Localized GMT format is used, the result might not be
1224 // appropriate for the requested daylight value.
1225 if ((daylight && timeType == UTZFMT_TIME_TYPE_STANDARD) || (!daylight && timeType == UTZFMT_TIME_TYPE_DAYLIGHT)) {
1226 offset = daylight ? getRawOffset() + getDSTSavings() : getRawOffset();
1227 if (style == SHORT_GENERIC) {
1228 tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1229 } else {
1230 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1231 }
1232 }
1233 } else if (style == LONG_GMT || style == SHORT_GMT) {
1234 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1235 if (U_FAILURE(status)) {
1236 result.remove();
1237 return result;
1238 }
1239 offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1240 switch (style) {
1241 case LONG_GMT:
1242 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1243 break;
1244 case SHORT_GMT:
1245 tzfmt->formatOffsetISO8601Basic(offset, FALSE, FALSE, FALSE, result, status);
1246 break;
1247 default:
1248 U_ASSERT(FALSE);
1249 }
1250
1251 } else {
1252 U_ASSERT(style == LONG || style == SHORT || style == SHORT_COMMONLY_USED);
1253 UTimeZoneNameType nameType = UTZNM_UNKNOWN;
1254 switch (style) {
1255 case LONG:
1256 nameType = daylight ? UTZNM_LONG_DAYLIGHT : UTZNM_LONG_STANDARD;
1257 break;
1258 case SHORT:
1259 case SHORT_COMMONLY_USED:
1260 nameType = daylight ? UTZNM_SHORT_DAYLIGHT : UTZNM_SHORT_STANDARD;
1261 break;
1262 default:
1263 U_ASSERT(FALSE);
1264 }
1265 LocalPointer<TimeZoneNames> tznames(TimeZoneNames::createInstance(locale, status));
1266 if (U_FAILURE(status)) {
1267 result.remove();
1268 return result;
1269 }
1270 UnicodeString canonicalID(ZoneMeta::getCanonicalCLDRID(*this));
1271 tznames->getDisplayName(canonicalID, nameType, date, result);
1272 if (result.isEmpty()) {
1273 // Fallback to localized GMT
1274 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1275 offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1276 if (style == LONG) {
1277 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1278 } else {
1279 tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1280 }
1281 }
1282 }
1283 if (U_FAILURE(status)) {
1284 result.remove();
1285 }
1286 return result;
1287 }
1288
1289 /**
1290 * Parse a custom time zone identifier and return a corresponding zone.
1291 * @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
1292 * GMT[+-]hh.
1293 * @return a newly created SimpleTimeZone with the given offset and
1294 * no Daylight Savings Time, or null if the id cannot be parsed.
1295 */
1296 TimeZone*
createCustomTimeZone(const UnicodeString & id)1297 TimeZone::createCustomTimeZone(const UnicodeString& id)
1298 {
1299 int32_t sign, hour, min, sec;
1300 if (parseCustomID(id, sign, hour, min, sec)) {
1301 UnicodeString customID;
1302 formatCustomID(hour, min, sec, (sign < 0), customID);
1303 int32_t offset = sign * ((hour * 60 + min) * 60 + sec) * 1000;
1304 return new SimpleTimeZone(offset, customID);
1305 }
1306 return NULL;
1307 }
1308
1309 UnicodeString&
getCustomID(const UnicodeString & id,UnicodeString & normalized,UErrorCode & status)1310 TimeZone::getCustomID(const UnicodeString& id, UnicodeString& normalized, UErrorCode& status) {
1311 normalized.remove();
1312 if (U_FAILURE(status)) {
1313 return normalized;
1314 }
1315 int32_t sign, hour, min, sec;
1316 if (parseCustomID(id, sign, hour, min, sec)) {
1317 formatCustomID(hour, min, sec, (sign < 0), normalized);
1318 } else {
1319 status = U_ILLEGAL_ARGUMENT_ERROR;
1320 }
1321 return normalized;
1322 }
1323
1324 UBool
parseCustomID(const UnicodeString & id,int32_t & sign,int32_t & hour,int32_t & min,int32_t & sec)1325 TimeZone::parseCustomID(const UnicodeString& id, int32_t& sign,
1326 int32_t& hour, int32_t& min, int32_t& sec) {
1327 static const int32_t kParseFailed = -99999;
1328
1329 NumberFormat* numberFormat = 0;
1330 UnicodeString idUppercase = id;
1331 idUppercase.toUpper("");
1332
1333 if (id.length() > GMT_ID_LENGTH &&
1334 idUppercase.startsWith(GMT_ID, GMT_ID_LENGTH))
1335 {
1336 ParsePosition pos(GMT_ID_LENGTH);
1337 sign = 1;
1338 hour = 0;
1339 min = 0;
1340 sec = 0;
1341
1342 if (id[pos.getIndex()] == MINUS /*'-'*/) {
1343 sign = -1;
1344 } else if (id[pos.getIndex()] != PLUS /*'+'*/) {
1345 return FALSE;
1346 }
1347 pos.setIndex(pos.getIndex() + 1);
1348
1349 UErrorCode success = U_ZERO_ERROR;
1350 numberFormat = NumberFormat::createInstance(success);
1351 if(U_FAILURE(success)){
1352 return FALSE;
1353 }
1354 numberFormat->setParseIntegerOnly(TRUE);
1355 //numberFormat->setLenient(TRUE); // TODO: May need to set this, depends on latest timezone parsing
1356
1357 // Look for either hh:mm, hhmm, or hh
1358 int32_t start = pos.getIndex();
1359 Formattable n(kParseFailed);
1360 numberFormat->parse(id, n, pos);
1361 if (pos.getIndex() == start) {
1362 delete numberFormat;
1363 return FALSE;
1364 }
1365 hour = n.getLong();
1366
1367 if (pos.getIndex() < id.length()) {
1368 if (pos.getIndex() - start > 2
1369 || id[pos.getIndex()] != COLON) {
1370 delete numberFormat;
1371 return FALSE;
1372 }
1373 // hh:mm
1374 pos.setIndex(pos.getIndex() + 1);
1375 int32_t oldPos = pos.getIndex();
1376 n.setLong(kParseFailed);
1377 numberFormat->parse(id, n, pos);
1378 if ((pos.getIndex() - oldPos) != 2) {
1379 // must be 2 digits
1380 delete numberFormat;
1381 return FALSE;
1382 }
1383 min = n.getLong();
1384 if (pos.getIndex() < id.length()) {
1385 if (id[pos.getIndex()] != COLON) {
1386 delete numberFormat;
1387 return FALSE;
1388 }
1389 // [:ss]
1390 pos.setIndex(pos.getIndex() + 1);
1391 oldPos = pos.getIndex();
1392 n.setLong(kParseFailed);
1393 numberFormat->parse(id, n, pos);
1394 if (pos.getIndex() != id.length()
1395 || (pos.getIndex() - oldPos) != 2) {
1396 delete numberFormat;
1397 return FALSE;
1398 }
1399 sec = n.getLong();
1400 }
1401 } else {
1402 // Supported formats are below -
1403 //
1404 // HHmmss
1405 // Hmmss
1406 // HHmm
1407 // Hmm
1408 // HH
1409 // H
1410
1411 int32_t length = pos.getIndex() - start;
1412 if (length <= 0 || 6 < length) {
1413 // invalid length
1414 delete numberFormat;
1415 return FALSE;
1416 }
1417 switch (length) {
1418 case 1:
1419 case 2:
1420 // already set to hour
1421 break;
1422 case 3:
1423 case 4:
1424 min = hour % 100;
1425 hour /= 100;
1426 break;
1427 case 5:
1428 case 6:
1429 sec = hour % 100;
1430 min = (hour/100) % 100;
1431 hour /= 10000;
1432 break;
1433 }
1434 }
1435
1436 delete numberFormat;
1437
1438 if (hour > kMAX_CUSTOM_HOUR || min > kMAX_CUSTOM_MIN || sec > kMAX_CUSTOM_SEC) {
1439 return FALSE;
1440 }
1441 return TRUE;
1442 }
1443 return FALSE;
1444 }
1445
1446 UnicodeString&
formatCustomID(int32_t hour,int32_t min,int32_t sec,UBool negative,UnicodeString & id)1447 TimeZone::formatCustomID(int32_t hour, int32_t min, int32_t sec,
1448 UBool negative, UnicodeString& id) {
1449 // Create time zone ID - GMT[+|-]hhmm[ss]
1450 id.setTo(GMT_ID, GMT_ID_LENGTH);
1451 if (hour | min | sec) {
1452 if (negative) {
1453 id += (UChar)MINUS;
1454 } else {
1455 id += (UChar)PLUS;
1456 }
1457
1458 if (hour < 10) {
1459 id += (UChar)ZERO_DIGIT;
1460 } else {
1461 id += (UChar)(ZERO_DIGIT + hour/10);
1462 }
1463 id += (UChar)(ZERO_DIGIT + hour%10);
1464 id += (UChar)COLON;
1465 if (min < 10) {
1466 id += (UChar)ZERO_DIGIT;
1467 } else {
1468 id += (UChar)(ZERO_DIGIT + min/10);
1469 }
1470 id += (UChar)(ZERO_DIGIT + min%10);
1471
1472 if (sec) {
1473 id += (UChar)COLON;
1474 if (sec < 10) {
1475 id += (UChar)ZERO_DIGIT;
1476 } else {
1477 id += (UChar)(ZERO_DIGIT + sec/10);
1478 }
1479 id += (UChar)(ZERO_DIGIT + sec%10);
1480 }
1481 }
1482 return id;
1483 }
1484
1485
1486 UBool
hasSameRules(const TimeZone & other) const1487 TimeZone::hasSameRules(const TimeZone& other) const
1488 {
1489 return (getRawOffset() == other.getRawOffset() &&
1490 useDaylightTime() == other.useDaylightTime());
1491 }
1492
initTZDataVersion(UErrorCode & status)1493 static void U_CALLCONV initTZDataVersion(UErrorCode &status) {
1494 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
1495 int32_t len = 0;
1496 UResourceBundle *bundle = ures_openDirect(NULL, kZONEINFO, &status);
1497 const UChar *tzver = ures_getStringByKey(bundle, kTZVERSION, &len, &status);
1498
1499 if (U_SUCCESS(status)) {
1500 if (len >= (int32_t)sizeof(TZDATA_VERSION)) {
1501 // Ensure that there is always space for a trailing nul in TZDATA_VERSION
1502 len = sizeof(TZDATA_VERSION) - 1;
1503 }
1504 u_UCharsToChars(tzver, TZDATA_VERSION, len);
1505 }
1506 ures_close(bundle);
1507
1508 }
1509
1510 const char*
getTZDataVersion(UErrorCode & status)1511 TimeZone::getTZDataVersion(UErrorCode& status)
1512 {
1513 umtx_initOnce(gTZDataVersionInitOnce, &initTZDataVersion, status);
1514 return (const char*)TZDATA_VERSION;
1515 }
1516
1517 UnicodeString&
getCanonicalID(const UnicodeString & id,UnicodeString & canonicalID,UErrorCode & status)1518 TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UErrorCode& status)
1519 {
1520 UBool isSystemID = FALSE;
1521 return getCanonicalID(id, canonicalID, isSystemID, status);
1522 }
1523
1524 UnicodeString&
getCanonicalID(const UnicodeString & id,UnicodeString & canonicalID,UBool & isSystemID,UErrorCode & status)1525 TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UBool& isSystemID,
1526 UErrorCode& status)
1527 {
1528 canonicalID.remove();
1529 isSystemID = FALSE;
1530 if (U_FAILURE(status)) {
1531 return canonicalID;
1532 }
1533 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) == 0) {
1534 // special case - Etc/Unknown is a canonical ID, but not system ID
1535 canonicalID.fastCopyFrom(id);
1536 isSystemID = FALSE;
1537 } else {
1538 ZoneMeta::getCanonicalCLDRID(id, canonicalID, status);
1539 if (U_SUCCESS(status)) {
1540 isSystemID = TRUE;
1541 } else {
1542 // Not a system ID
1543 status = U_ZERO_ERROR;
1544 getCustomID(id, canonicalID, status);
1545 }
1546 }
1547 return canonicalID;
1548 }
1549
1550 UnicodeString&
getWindowsID(const UnicodeString & id,UnicodeString & winid,UErrorCode & status)1551 TimeZone::getWindowsID(const UnicodeString& id, UnicodeString& winid, UErrorCode& status) {
1552 winid.remove();
1553 if (U_FAILURE(status)) {
1554 return winid;
1555 }
1556
1557 // canonicalize the input ID
1558 UnicodeString canonicalID;
1559 UBool isSystemID = FALSE;
1560
1561 getCanonicalID(id, canonicalID, isSystemID, status);
1562 if (U_FAILURE(status) || !isSystemID) {
1563 // mapping data is only applicable to tz database IDs
1564 if (status == U_ILLEGAL_ARGUMENT_ERROR) {
1565 // getWindowsID() sets an empty string where
1566 // getCanonicalID() sets a U_ILLEGAL_ARGUMENT_ERROR.
1567 status = U_ZERO_ERROR;
1568 }
1569 return winid;
1570 }
1571
1572 UResourceBundle *mapTimezones = ures_openDirect(NULL, "windowsZones", &status);
1573 ures_getByKey(mapTimezones, "mapTimezones", mapTimezones, &status);
1574
1575 if (U_FAILURE(status)) {
1576 return winid;
1577 }
1578
1579 UResourceBundle *winzone = NULL;
1580 UBool found = FALSE;
1581 while (ures_hasNext(mapTimezones) && !found) {
1582 winzone = ures_getNextResource(mapTimezones, winzone, &status);
1583 if (U_FAILURE(status)) {
1584 break;
1585 }
1586 if (ures_getType(winzone) != URES_TABLE) {
1587 continue;
1588 }
1589 UResourceBundle *regionalData = NULL;
1590 while (ures_hasNext(winzone) && !found) {
1591 regionalData = ures_getNextResource(winzone, regionalData, &status);
1592 if (U_FAILURE(status)) {
1593 break;
1594 }
1595 if (ures_getType(regionalData) != URES_STRING) {
1596 continue;
1597 }
1598 int32_t len;
1599 const UChar *tzids = ures_getString(regionalData, &len, &status);
1600 if (U_FAILURE(status)) {
1601 break;
1602 }
1603
1604 const UChar *start = tzids;
1605 UBool hasNext = TRUE;
1606 while (hasNext) {
1607 const UChar *end = u_strchr(start, (UChar)0x20);
1608 if (end == NULL) {
1609 end = tzids + len;
1610 hasNext = FALSE;
1611 }
1612 if (canonicalID.compare(start, end - start) == 0) {
1613 winid = UnicodeString(ures_getKey(winzone), -1 , US_INV);
1614 found = TRUE;
1615 break;
1616 }
1617 start = end + 1;
1618 }
1619 }
1620 ures_close(regionalData);
1621 }
1622 ures_close(winzone);
1623 ures_close(mapTimezones);
1624
1625 return winid;
1626 }
1627
1628 #define MAX_WINDOWS_ID_SIZE 128
1629
1630 UnicodeString&
getIDForWindowsID(const UnicodeString & winid,const char * region,UnicodeString & id,UErrorCode & status)1631 TimeZone::getIDForWindowsID(const UnicodeString& winid, const char* region, UnicodeString& id, UErrorCode& status) {
1632 id.remove();
1633 if (U_FAILURE(status)) {
1634 return id;
1635 }
1636
1637 UResourceBundle *zones = ures_openDirect(NULL, "windowsZones", &status);
1638 ures_getByKey(zones, "mapTimezones", zones, &status);
1639 if (U_FAILURE(status)) {
1640 ures_close(zones);
1641 return id;
1642 }
1643
1644 UErrorCode tmperr = U_ZERO_ERROR;
1645 char winidKey[MAX_WINDOWS_ID_SIZE];
1646 int32_t winKeyLen = winid.extract(0, winid.length(), winidKey, sizeof(winidKey) - 1, US_INV);
1647
1648 if (winKeyLen == 0 || winKeyLen >= (int32_t)sizeof(winidKey)) {
1649 ures_close(zones);
1650 return id;
1651 }
1652 winidKey[winKeyLen] = 0;
1653
1654 ures_getByKey(zones, winidKey, zones, &tmperr); // use tmperr, because windows mapping might not
1655 // be avaiable by design
1656 if (U_FAILURE(tmperr)) {
1657 ures_close(zones);
1658 return id;
1659 }
1660
1661 const UChar *tzid = NULL;
1662 int32_t len = 0;
1663 UBool gotID = FALSE;
1664 if (region) {
1665 const UChar *tzids = ures_getStringByKey(zones, region, &len, &tmperr); // use tmperr, because
1666 // regional mapping is optional
1667 if (U_SUCCESS(tmperr)) {
1668 // first ID delimited by space is the defasult one
1669 const UChar *end = u_strchr(tzids, (UChar)0x20);
1670 if (end == NULL) {
1671 id.setTo(tzids, -1);
1672 } else {
1673 id.setTo(tzids, end - tzids);
1674 }
1675 gotID = TRUE;
1676 }
1677 }
1678
1679 if (!gotID) {
1680 tzid = ures_getStringByKey(zones, "001", &len, &status); // using status, because "001" must be
1681 // available at this point
1682 if (U_SUCCESS(status)) {
1683 id.setTo(tzid, len);
1684 }
1685 }
1686
1687 ures_close(zones);
1688 return id;
1689 }
1690
1691
1692 U_NAMESPACE_END
1693
1694 #endif /* #if !UCONFIG_NO_FORMATTING */
1695
1696 //eof
1697