Line data Source code
1 : // © 2016 and later: Unicode, Inc. and others.
2 : // License & terms of use: http://www.unicode.org/copyright.html
3 : /*
4 : *******************************************************************************
5 : * Copyright (C) 1997-2016, International Business Machines Corporation and
6 : * others. All Rights Reserved.
7 : *******************************************************************************
8 : *
9 : * File TIMEZONE.CPP
10 : *
11 : * Modification History:
12 : *
13 : * Date Name Description
14 : * 12/05/96 clhuang Creation.
15 : * 04/21/97 aliu General clean-up and bug fixing.
16 : * 05/08/97 aliu Fixed Hashtable code per code review.
17 : * 07/09/97 helena Changed createInstance to createDefault.
18 : * 07/29/97 aliu Updated with all-new list of 96 UNIX-derived
19 : * TimeZones. Changed mechanism to load from static
20 : * array rather than resource bundle.
21 : * 07/07/1998 srl Bugfixes from the Java side: UTC GMT CAT NST
22 : * Added getDisplayName API
23 : * going to add custom parsing.
24 : *
25 : * ISSUES:
26 : * - should getDisplayName cache something?
27 : * - should custom time zones be cached? [probably]
28 : * 08/10/98 stephen Brought getDisplayName() API in-line w/ conventions
29 : * 08/19/98 stephen Changed createTimeZone() to never return 0
30 : * 09/02/98 stephen Added getOffset(monthLen) and hasSameRules()
31 : * 09/15/98 stephen Added getStaticClassID()
32 : * 02/22/99 stephen Removed character literals for EBCDIC safety
33 : * 05/04/99 stephen Changed initDefault() for Mutex issues
34 : * 07/12/99 helena HPUX 11 CC Port.
35 : * 12/03/99 aliu Moved data out of static table into icudata.dll.
36 : * Substantial rewrite of zone lookup, default zone, and
37 : * available IDs code. Misc. cleanup.
38 : *********************************************************************************/
39 :
40 : #include "utypeinfo.h" // for 'typeid' to work
41 :
42 : #include "unicode/utypes.h"
43 : #include "unicode/ustring.h"
44 : #include "uassert.h"
45 : #include "ustr_imp.h"
46 :
47 : #ifdef U_DEBUG_TZ
48 : # include <stdio.h>
49 : # include "uresimp.h" // for debugging
50 :
51 : static void debug_tz_loc(const char *f, int32_t l)
52 : {
53 : fprintf(stderr, "%s:%d: ", f, l);
54 : }
55 :
56 : static void debug_tz_msg(const char *pat, ...)
57 : {
58 : va_list ap;
59 : va_start(ap, pat);
60 : vfprintf(stderr, pat, ap);
61 : fflush(stderr);
62 : }
63 : static char gStrBuf[256];
64 : #define U_DEBUG_TZ_STR(x) u_austrncpy(gStrBuf,x,sizeof(gStrBuf)-1)
65 : // must use double parens, i.e.: U_DEBUG_TZ_MSG(("four is: %d",4));
66 : #define U_DEBUG_TZ_MSG(x) {debug_tz_loc(__FILE__,__LINE__);debug_tz_msg x;}
67 : #else
68 : #define U_DEBUG_TZ_MSG(x)
69 : #endif
70 :
71 : #if !UCONFIG_NO_FORMATTING
72 :
73 : #include "unicode/simpletz.h"
74 : #include "unicode/calendar.h"
75 : #include "unicode/gregocal.h"
76 : #include "unicode/ures.h"
77 : #include "unicode/tzfmt.h"
78 : #include "unicode/numfmt.h"
79 : #include "gregoimp.h"
80 : #include "uresimp.h" // struct UResourceBundle
81 : #include "olsontz.h"
82 : #include "mutex.h"
83 : #include "unicode/udata.h"
84 : #include "ucln_in.h"
85 : #include "cstring.h"
86 : #include "cmemory.h"
87 : #include "unicode/strenum.h"
88 : #include "uassert.h"
89 : #include "zonemeta.h"
90 :
91 : #define kZONEINFO "zoneinfo64"
92 : #define kREGIONS "Regions"
93 : #define kZONES "Zones"
94 : #define kRULES "Rules"
95 : #define kNAMES "Names"
96 : #define kTZVERSION "TZVersion"
97 : #define kLINKS "links"
98 : #define kMAX_CUSTOM_HOUR 23
99 : #define kMAX_CUSTOM_MIN 59
100 : #define kMAX_CUSTOM_SEC 59
101 : #define MINUS 0x002D
102 : #define PLUS 0x002B
103 : #define ZERO_DIGIT 0x0030
104 : #define COLON 0x003A
105 :
106 : // Static data and constants
107 :
108 : static const UChar WORLD[] = {0x30, 0x30, 0x31, 0x00}; /* "001" */
109 :
110 : static const UChar GMT_ID[] = {0x47, 0x4D, 0x54, 0x00}; /* "GMT" */
111 : static const UChar UNKNOWN_ZONE_ID[] = {0x45, 0x74, 0x63, 0x2F, 0x55, 0x6E, 0x6B, 0x6E, 0x6F, 0x77, 0x6E, 0x00}; /* "Etc/Unknown" */
112 : static const int32_t GMT_ID_LENGTH = 3;
113 : static const int32_t UNKNOWN_ZONE_ID_LENGTH = 11;
114 :
115 : static icu::TimeZone* DEFAULT_ZONE = NULL;
116 : static icu::UInitOnce gDefaultZoneInitOnce = U_INITONCE_INITIALIZER;
117 :
118 : // Prevents DEFAULT_ZONE from being deleted while another thread is cloning it.
119 : static UMutex gDefaultZoneMutex = U_MUTEX_INITIALIZER;
120 :
121 : static icu::TimeZone* _GMT = NULL;
122 : static icu::TimeZone* _UNKNOWN_ZONE = NULL;
123 : static icu::UInitOnce gStaticZonesInitOnce = U_INITONCE_INITIALIZER;
124 :
125 : static char TZDATA_VERSION[16];
126 : static icu::UInitOnce gTZDataVersionInitOnce = U_INITONCE_INITIALIZER;
127 :
128 : static int32_t* MAP_SYSTEM_ZONES = NULL;
129 : static int32_t* MAP_CANONICAL_SYSTEM_ZONES = NULL;
130 : static int32_t* MAP_CANONICAL_SYSTEM_LOCATION_ZONES = NULL;
131 :
132 : static int32_t LEN_SYSTEM_ZONES = 0;
133 : static int32_t LEN_CANONICAL_SYSTEM_ZONES = 0;
134 : static int32_t LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
135 :
136 : static icu::UInitOnce gSystemZonesInitOnce = U_INITONCE_INITIALIZER;
137 : static icu::UInitOnce gCanonicalZonesInitOnce = U_INITONCE_INITIALIZER;
138 : static icu::UInitOnce gCanonicalLocationZonesInitOnce = U_INITONCE_INITIALIZER;
139 :
140 : U_CDECL_BEGIN
141 0 : static UBool U_CALLCONV timeZone_cleanup(void)
142 : {
143 : U_NAMESPACE_USE
144 0 : delete DEFAULT_ZONE;
145 0 : DEFAULT_ZONE = NULL;
146 0 : gDefaultZoneInitOnce.reset();
147 :
148 0 : delete _GMT;
149 0 : _GMT = NULL;
150 0 : delete _UNKNOWN_ZONE;
151 0 : _UNKNOWN_ZONE = NULL;
152 0 : gStaticZonesInitOnce.reset();
153 :
154 0 : uprv_memset(TZDATA_VERSION, 0, sizeof(TZDATA_VERSION));
155 0 : gTZDataVersionInitOnce.reset();
156 :
157 0 : LEN_SYSTEM_ZONES = 0;
158 0 : uprv_free(MAP_SYSTEM_ZONES);
159 0 : MAP_SYSTEM_ZONES = 0;
160 0 : gSystemZonesInitOnce.reset();
161 :
162 0 : LEN_CANONICAL_SYSTEM_ZONES = 0;
163 0 : uprv_free(MAP_CANONICAL_SYSTEM_ZONES);
164 0 : MAP_CANONICAL_SYSTEM_ZONES = 0;
165 0 : gCanonicalZonesInitOnce.reset();
166 :
167 0 : LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
168 0 : uprv_free(MAP_CANONICAL_SYSTEM_LOCATION_ZONES);
169 0 : MAP_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
170 0 : gCanonicalLocationZonesInitOnce.reset();
171 :
172 0 : return TRUE;
173 : }
174 : U_CDECL_END
175 :
176 : U_NAMESPACE_BEGIN
177 :
178 0 : static int32_t findInStringArray(UResourceBundle* array, const UnicodeString& id, UErrorCode &status)
179 : {
180 0 : UnicodeString copy;
181 : const UChar *u;
182 : int32_t len;
183 :
184 0 : int32_t start = 0;
185 0 : int32_t limit = ures_getSize(array);
186 : int32_t mid;
187 0 : int32_t lastMid = INT32_MAX;
188 0 : if(U_FAILURE(status) || (limit < 1)) {
189 0 : return -1;
190 : }
191 : U_DEBUG_TZ_MSG(("fisa: Looking for %s, between %d and %d\n", U_DEBUG_TZ_STR(UnicodeString(id).getTerminatedBuffer()), start, limit));
192 :
193 : for (;;) {
194 0 : mid = (int32_t)((start + limit) / 2);
195 0 : if (lastMid == mid) { /* Have we moved? */
196 0 : break; /* We haven't moved, and it wasn't found. */
197 : }
198 0 : lastMid = mid;
199 0 : u = ures_getStringByIndex(array, mid, &len, &status);
200 0 : if (U_FAILURE(status)) {
201 0 : break;
202 : }
203 : U_DEBUG_TZ_MSG(("tz: compare to %s, %d .. [%d] .. %d\n", U_DEBUG_TZ_STR(u), start, mid, limit));
204 0 : copy.setTo(TRUE, u, len);
205 0 : int r = id.compare(copy);
206 0 : if(r==0) {
207 : U_DEBUG_TZ_MSG(("fisa: found at %d\n", mid));
208 0 : return mid;
209 0 : } else if(r<0) {
210 0 : limit = mid;
211 : } else {
212 0 : start = mid;
213 : }
214 0 : }
215 : U_DEBUG_TZ_MSG(("fisa: not found\n"));
216 0 : return -1;
217 : }
218 :
219 : /**
220 : * Fetch a specific zone by name. Replaces the getByKey call.
221 : * @param top Top timezone resource
222 : * @param id Time zone ID
223 : * @param oldbundle Bundle for reuse (or NULL). see 'ures_open()'
224 : * @return the zone's bundle if found, or undefined if error. Reuses oldbundle.
225 : */
226 0 : static UResourceBundle* getZoneByName(const UResourceBundle* top, const UnicodeString& id, UResourceBundle *oldbundle, UErrorCode& status) {
227 : // load the Rules object
228 0 : UResourceBundle *tmp = ures_getByKey(top, kNAMES, NULL, &status);
229 :
230 : // search for the string
231 0 : int32_t idx = findInStringArray(tmp, id, status);
232 :
233 0 : if((idx == -1) && U_SUCCESS(status)) {
234 : // not found
235 0 : status = U_MISSING_RESOURCE_ERROR;
236 : //ures_close(oldbundle);
237 : //oldbundle = NULL;
238 : } else {
239 : U_DEBUG_TZ_MSG(("gzbn: oldbundle= size %d, type %d, %s\n", ures_getSize(tmp), ures_getType(tmp), u_errorName(status)));
240 0 : tmp = ures_getByKey(top, kZONES, tmp, &status); // get Zones object from top
241 : 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)));
242 0 : oldbundle = ures_getByIndex(tmp, idx, oldbundle, &status); // get nth Zone object
243 : 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)));
244 : }
245 0 : ures_close(tmp);
246 0 : if(U_FAILURE(status)) {
247 : //ures_close(oldbundle);
248 0 : return NULL;
249 : } else {
250 0 : return oldbundle;
251 : }
252 : }
253 :
254 :
255 0 : UResourceBundle* TimeZone::loadRule(const UResourceBundle* top, const UnicodeString& ruleid, UResourceBundle* oldbundle, UErrorCode& status) {
256 : char key[64];
257 0 : ruleid.extract(0, sizeof(key)-1, key, (int32_t)sizeof(key)-1, US_INV);
258 : U_DEBUG_TZ_MSG(("loadRule(%s)\n", key));
259 0 : UResourceBundle *r = ures_getByKey(top, kRULES, oldbundle, &status);
260 : U_DEBUG_TZ_MSG(("loadRule(%s) -> kRULES [%s]\n", key, u_errorName(status)));
261 0 : r = ures_getByKey(r, key, r, &status);
262 : U_DEBUG_TZ_MSG(("loadRule(%s) -> item [%s]\n", key, u_errorName(status)));
263 0 : return r;
264 : }
265 :
266 : /**
267 : * Given an ID, open the appropriate resource for the given time zone.
268 : * Dereference aliases if necessary.
269 : * @param id zone id
270 : * @param res resource, which must be ready for use (initialized but not open)
271 : * @param ec input-output error code
272 : * @return top-level resource bundle
273 : */
274 0 : static UResourceBundle* openOlsonResource(const UnicodeString& id,
275 : UResourceBundle& res,
276 : UErrorCode& ec)
277 : {
278 : #if U_DEBUG_TZ
279 : char buf[128];
280 : id.extract(0, sizeof(buf)-1, buf, sizeof(buf), "");
281 : #endif
282 0 : UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
283 : U_DEBUG_TZ_MSG(("pre: res sz=%d\n", ures_getSize(&res)));
284 0 : /* &res = */ getZoneByName(top, id, &res, ec);
285 : // Dereference if this is an alias. Docs say result should be 1
286 : // but it is 0 in 2.8 (?).
287 : U_DEBUG_TZ_MSG(("Loading zone '%s' (%s, size %d) - %s\n", buf, ures_getKey((UResourceBundle*)&res), ures_getSize(&res), u_errorName(ec)));
288 0 : if (ures_getType(&res) == URES_INT) {
289 0 : int32_t deref = ures_getInt(&res, &ec) + 0;
290 : U_DEBUG_TZ_MSG(("getInt: %s - type is %d\n", u_errorName(ec), ures_getType(&res)));
291 0 : UResourceBundle *ares = ures_getByKey(top, kZONES, NULL, &ec); // dereference Zones section
292 0 : ures_getByIndex(ares, deref, &res, &ec);
293 0 : ures_close(ares);
294 : U_DEBUG_TZ_MSG(("alias to #%d (%s) - %s\n", deref, "??", u_errorName(ec)));
295 : } else {
296 : U_DEBUG_TZ_MSG(("not an alias - size %d\n", ures_getSize(&res)));
297 : }
298 : U_DEBUG_TZ_MSG(("%s - final status is %s\n", buf, u_errorName(ec)));
299 0 : return top;
300 : }
301 :
302 : // -------------------------------------
303 :
304 : namespace {
305 :
306 0 : void U_CALLCONV initStaticTimeZones() {
307 : // Initialize _GMT independently of other static data; it should
308 : // be valid even if we can't load the time zone UDataMemory.
309 0 : ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
310 0 : _UNKNOWN_ZONE = new SimpleTimeZone(0, UnicodeString(TRUE, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH));
311 0 : _GMT = new SimpleTimeZone(0, UnicodeString(TRUE, GMT_ID, GMT_ID_LENGTH));
312 0 : }
313 :
314 : } // anonymous namespace
315 :
316 : const TimeZone& U_EXPORT2
317 0 : TimeZone::getUnknown()
318 : {
319 0 : umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
320 0 : return *_UNKNOWN_ZONE;
321 : }
322 :
323 : const TimeZone* U_EXPORT2
324 0 : TimeZone::getGMT(void)
325 : {
326 0 : umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
327 0 : return _GMT;
328 : }
329 :
330 : // *****************************************************************************
331 : // class TimeZone
332 : // *****************************************************************************
333 :
334 0 : UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)
335 :
336 0 : TimeZone::TimeZone()
337 0 : : UObject(), fID()
338 : {
339 0 : }
340 :
341 : // -------------------------------------
342 :
343 0 : TimeZone::TimeZone(const UnicodeString &id)
344 0 : : UObject(), fID(id)
345 : {
346 0 : }
347 :
348 : // -------------------------------------
349 :
350 0 : TimeZone::~TimeZone()
351 : {
352 0 : }
353 :
354 : // -------------------------------------
355 :
356 0 : TimeZone::TimeZone(const TimeZone &source)
357 0 : : UObject(source), fID(source.fID)
358 : {
359 0 : }
360 :
361 : // -------------------------------------
362 :
363 : TimeZone &
364 0 : TimeZone::operator=(const TimeZone &right)
365 : {
366 0 : if (this != &right) fID = right.fID;
367 0 : return *this;
368 : }
369 :
370 : // -------------------------------------
371 :
372 : UBool
373 0 : TimeZone::operator==(const TimeZone& that) const
374 : {
375 0 : return typeid(*this) == typeid(that) &&
376 0 : fID == that.fID;
377 : }
378 :
379 : // -------------------------------------
380 :
381 : namespace {
382 : TimeZone*
383 0 : createSystemTimeZone(const UnicodeString& id, UErrorCode& ec) {
384 0 : if (U_FAILURE(ec)) {
385 0 : return NULL;
386 : }
387 0 : TimeZone* z = 0;
388 : UResourceBundle res;
389 0 : ures_initStackObject(&res);
390 : U_DEBUG_TZ_MSG(("pre-err=%s\n", u_errorName(ec)));
391 0 : UResourceBundle *top = openOlsonResource(id, res, ec);
392 : U_DEBUG_TZ_MSG(("post-err=%s\n", u_errorName(ec)));
393 0 : if (U_SUCCESS(ec)) {
394 0 : z = new OlsonTimeZone(top, &res, id, ec);
395 : if (z == NULL) {
396 : U_DEBUG_TZ_MSG(("cstz: olson time zone failed to initialize - err %s\n", u_errorName(ec)));
397 : }
398 : }
399 0 : ures_close(&res);
400 0 : ures_close(top);
401 0 : if (U_FAILURE(ec)) {
402 : U_DEBUG_TZ_MSG(("cstz: failed to create, err %s\n", u_errorName(ec)));
403 0 : delete z;
404 0 : z = 0;
405 : }
406 0 : return z;
407 : }
408 :
409 : /**
410 : * Lookup the given name in our system zone table. If found,
411 : * instantiate a new zone of that name and return it. If not
412 : * found, return 0.
413 : */
414 : TimeZone*
415 0 : createSystemTimeZone(const UnicodeString& id) {
416 0 : UErrorCode ec = U_ZERO_ERROR;
417 0 : return createSystemTimeZone(id, ec);
418 : }
419 :
420 : }
421 :
422 : TimeZone* U_EXPORT2
423 0 : TimeZone::createTimeZone(const UnicodeString& ID)
424 : {
425 : /* We first try to lookup the zone ID in our system list. If this
426 : * fails, we try to parse it as a custom string GMT[+-]hh:mm. If
427 : * all else fails, we return GMT, which is probably not what the
428 : * user wants, but at least is a functioning TimeZone object.
429 : *
430 : * We cannot return NULL, because that would break compatibility
431 : * with the JDK.
432 : */
433 0 : TimeZone* result = createSystemTimeZone(ID);
434 :
435 0 : if (result == NULL) {
436 : U_DEBUG_TZ_MSG(("failed to load system time zone with id - falling to custom"));
437 0 : result = createCustomTimeZone(ID);
438 : }
439 0 : if (result == NULL) {
440 : U_DEBUG_TZ_MSG(("failed to load time zone with id - falling to Etc/Unknown(GMT)"));
441 0 : const TimeZone& unknown = getUnknown();
442 0 : if (_UNKNOWN_ZONE == NULL) { // Cannot test (&unknown == NULL) because the
443 : U_DEBUG_TZ_MSG(("failed to getUnknown()")); // behavior of NULL references is undefined.
444 : } else {
445 0 : result = unknown.clone();
446 : }
447 : }
448 0 : return result;
449 : }
450 :
451 : // -------------------------------------
452 :
453 : TimeZone* U_EXPORT2
454 0 : TimeZone::detectHostTimeZone()
455 : {
456 : // We access system timezone data through TPlatformUtilities,
457 : // including tzset(), timezone, and tzname[].
458 0 : int32_t rawOffset = 0;
459 : const char *hostID;
460 :
461 : // First, try to create a system timezone, based
462 : // on the string ID in tzname[0].
463 :
464 0 : uprv_tzset(); // Initialize tz... system data
465 :
466 0 : uprv_tzname_clear_cache();
467 :
468 : // Get the timezone ID from the host. This function should do
469 : // any required host-specific remapping; e.g., on Windows this
470 : // function maps the Date and Time control panel setting to an
471 : // ICU timezone ID.
472 0 : hostID = uprv_tzname(0);
473 :
474 : // Invert sign because UNIX semantics are backwards
475 0 : rawOffset = uprv_timezone() * -U_MILLIS_PER_SECOND;
476 :
477 0 : TimeZone* hostZone = NULL;
478 :
479 : /* Make sure that the string is NULL terminated to prevent BoundsChecker/Purify warnings. */
480 0 : UnicodeString hostStrID(hostID, -1, US_INV);
481 0 : hostStrID.append((UChar)0);
482 0 : hostStrID.truncate(hostStrID.length()-1);
483 0 : hostZone = createSystemTimeZone(hostStrID);
484 :
485 : #if U_PLATFORM_USES_ONLY_WIN32_API
486 : // hostID points to a heap-allocated location on Windows.
487 : uprv_free(const_cast<char *>(hostID));
488 : #endif
489 :
490 0 : int32_t hostIDLen = hostStrID.length();
491 0 : if (hostZone != NULL && rawOffset != hostZone->getRawOffset()
492 0 : && (3 <= hostIDLen && hostIDLen <= 4))
493 : {
494 : // Uh oh. This probably wasn't a good id.
495 : // It was probably an ambiguous abbreviation
496 0 : delete hostZone;
497 0 : hostZone = NULL;
498 : }
499 :
500 : // Construct a fixed standard zone with the host's ID
501 : // and raw offset.
502 0 : if (hostZone == NULL) {
503 0 : hostZone = new SimpleTimeZone(rawOffset, hostStrID);
504 : }
505 :
506 : // If we _still_ don't have a time zone, use GMT.
507 : //
508 : // Note: This is extremely unlikely situation. If
509 : // new SimpleTimeZone(...) above fails, the following
510 : // code may also fail.
511 0 : if (hostZone == NULL) {
512 0 : const TimeZone* temptz = TimeZone::getGMT();
513 : // If we can't use GMT, get out.
514 0 : if (temptz == NULL) {
515 0 : return NULL;
516 : }
517 0 : hostZone = temptz->clone();
518 : }
519 :
520 0 : return hostZone;
521 : }
522 :
523 : // -------------------------------------
524 :
525 : /**
526 : * Initialize DEFAULT_ZONE from the system default time zone.
527 : * Upon return, DEFAULT_ZONE will not be NULL, unless operator new()
528 : * returns NULL.
529 : */
530 0 : static void U_CALLCONV initDefault()
531 : {
532 0 : ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
533 :
534 : // If setDefault() has already been called we can skip getting the
535 : // default zone information from the system.
536 0 : if (DEFAULT_ZONE != NULL) {
537 0 : return;
538 : }
539 :
540 : // NOTE: this code is safely single threaded, being only
541 : // run via umtx_initOnce().
542 : //
543 : // Some of the locale/timezone OS functions may not be thread safe,
544 : //
545 : // The operating system might actually use ICU to implement timezones.
546 : // So we may have ICU calling ICU here, like on AIX.
547 : // There shouldn't be a problem with this; initOnce does not hold a mutex
548 : // while the init function is being run.
549 :
550 : // The code detecting the host time zone was separated from this
551 : // and implemented as TimeZone::detectHostTimeZone()
552 :
553 0 : TimeZone *default_zone = TimeZone::detectHostTimeZone();
554 :
555 : // The only way for DEFAULT_ZONE to be non-null at this point is if the user
556 : // made a thread-unsafe call to setDefault() or adoptDefault() in another
557 : // thread while this thread was doing something that required getting the default.
558 0 : U_ASSERT(DEFAULT_ZONE == NULL);
559 :
560 0 : DEFAULT_ZONE = default_zone;
561 : }
562 :
563 : // -------------------------------------
564 :
565 : TimeZone* U_EXPORT2
566 0 : TimeZone::createDefault()
567 : {
568 0 : umtx_initOnce(gDefaultZoneInitOnce, initDefault);
569 :
570 0 : Mutex mutex_lock(&gDefaultZoneMutex);
571 0 : return (DEFAULT_ZONE != NULL) ? DEFAULT_ZONE->clone() : NULL;
572 : }
573 :
574 : void
575 0 : TimeZone::recreateDefault()
576 : {
577 0 : TimeZone *default_zone = TimeZone::detectHostTimeZone();
578 0 : adoptDefault(default_zone);
579 0 : }
580 :
581 : // -------------------------------------
582 :
583 : void U_EXPORT2
584 0 : TimeZone::adoptDefault(TimeZone* zone)
585 : {
586 0 : if (zone != NULL)
587 : {
588 0 : Mutex mutex_lock(&gDefaultZoneMutex);
589 0 : TimeZone *old = DEFAULT_ZONE;
590 0 : DEFAULT_ZONE = zone;
591 0 : delete old;
592 0 : ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
593 : }
594 0 : }
595 : // -------------------------------------
596 :
597 : void U_EXPORT2
598 0 : TimeZone::setDefault(const TimeZone& zone)
599 : {
600 0 : adoptDefault(zone.clone());
601 0 : }
602 :
603 : //----------------------------------------------------------------------
604 :
605 :
606 0 : static void U_CALLCONV initMap(USystemTimeZoneType type, UErrorCode& ec) {
607 0 : ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
608 :
609 0 : UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
610 0 : res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
611 0 : if (U_SUCCESS(ec)) {
612 0 : int32_t size = ures_getSize(res);
613 0 : int32_t *m = (int32_t *)uprv_malloc(size * sizeof(int32_t));
614 0 : if (m == NULL) {
615 0 : ec = U_MEMORY_ALLOCATION_ERROR;
616 : } else {
617 0 : int32_t numEntries = 0;
618 0 : for (int32_t i = 0; i < size; i++) {
619 0 : UnicodeString id = ures_getUnicodeStringByIndex(res, i, &ec);
620 0 : if (U_FAILURE(ec)) {
621 0 : break;
622 : }
623 0 : if (0 == id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH)) {
624 : // exclude Etc/Unknown
625 0 : continue;
626 : }
627 0 : if (type == UCAL_ZONE_TYPE_CANONICAL || type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
628 0 : UnicodeString canonicalID;
629 0 : ZoneMeta::getCanonicalCLDRID(id, canonicalID, ec);
630 0 : if (U_FAILURE(ec)) {
631 0 : break;
632 : }
633 0 : if (canonicalID != id) {
634 : // exclude aliases
635 0 : continue;
636 : }
637 : }
638 0 : if (type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
639 0 : const UChar *region = TimeZone::getRegion(id, ec);
640 0 : if (U_FAILURE(ec)) {
641 0 : break;
642 : }
643 0 : if (u_strcmp(region, WORLD) == 0) {
644 : // exclude non-location ("001")
645 0 : continue;
646 : }
647 : }
648 0 : m[numEntries++] = i;
649 : }
650 0 : if (U_SUCCESS(ec)) {
651 0 : int32_t *tmp = m;
652 0 : m = (int32_t *)uprv_realloc(tmp, numEntries * sizeof(int32_t));
653 0 : if (m == NULL) {
654 : // realloc failed.. use the original one even it has unused
655 : // area at the end
656 0 : m = tmp;
657 : }
658 :
659 0 : switch(type) {
660 : case UCAL_ZONE_TYPE_ANY:
661 0 : U_ASSERT(MAP_SYSTEM_ZONES == NULL);
662 0 : MAP_SYSTEM_ZONES = m;
663 0 : LEN_SYSTEM_ZONES = numEntries;
664 0 : break;
665 : case UCAL_ZONE_TYPE_CANONICAL:
666 0 : U_ASSERT(MAP_CANONICAL_SYSTEM_ZONES == NULL);
667 0 : MAP_CANONICAL_SYSTEM_ZONES = m;
668 0 : LEN_CANONICAL_SYSTEM_ZONES = numEntries;
669 0 : break;
670 : case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
671 0 : U_ASSERT(MAP_CANONICAL_SYSTEM_LOCATION_ZONES == NULL);
672 0 : MAP_CANONICAL_SYSTEM_LOCATION_ZONES = m;
673 0 : LEN_CANONICAL_SYSTEM_LOCATION_ZONES = numEntries;
674 0 : break;
675 : }
676 : }
677 : }
678 : }
679 0 : ures_close(res);
680 0 : }
681 :
682 :
683 : /**
684 : * This is the default implementation for subclasses that do not
685 : * override this method. This implementation calls through to the
686 : * 8-argument getOffset() method after suitable computations, and
687 : * correctly adjusts GMT millis to local millis when necessary.
688 : */
689 0 : void TimeZone::getOffset(UDate date, UBool local, int32_t& rawOffset,
690 : int32_t& dstOffset, UErrorCode& ec) const {
691 0 : if (U_FAILURE(ec)) {
692 0 : return;
693 : }
694 :
695 0 : rawOffset = getRawOffset();
696 0 : if (!local) {
697 0 : date += rawOffset; // now in local standard millis
698 : }
699 :
700 : // When local == TRUE, date might not be in local standard
701 : // millis. getOffset taking 7 parameters used here assume
702 : // the given time in day is local standard time.
703 : // At STD->DST transition, there is a range of time which
704 : // does not exist. When 'date' is in this time range
705 : // (and local == TRUE), this method interprets the specified
706 : // local time as DST. At DST->STD transition, there is a
707 : // range of time which occurs twice. In this case, this
708 : // method interprets the specified local time as STD.
709 : // To support the behavior above, we need to call getOffset
710 : // (with 7 args) twice when local == true and DST is
711 : // detected in the initial call.
712 0 : for (int32_t pass=0; ; ++pass) {
713 : int32_t year, month, dom, dow;
714 0 : double day = uprv_floor(date / U_MILLIS_PER_DAY);
715 0 : int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
716 :
717 0 : Grego::dayToFields(day, year, month, dom, dow);
718 :
719 0 : dstOffset = getOffset(GregorianCalendar::AD, year, month, dom,
720 : (uint8_t) dow, millis,
721 0 : Grego::monthLength(year, month),
722 0 : ec) - rawOffset;
723 :
724 : // Recompute if local==TRUE, dstOffset!=0.
725 0 : if (pass!=0 || !local || dstOffset == 0) {
726 : break;
727 : }
728 : // adjust to local standard millis
729 0 : date -= dstOffset;
730 0 : }
731 : }
732 :
733 : // -------------------------------------
734 :
735 : // New available IDs API as of ICU 2.4. Uses StringEnumeration API.
736 :
737 : class TZEnumeration : public StringEnumeration {
738 : private:
739 :
740 : // Map into to zones. Our results are zone[map[i]] for
741 : // i=0..len-1, where zone[i] is the i-th Olson zone. If map==NULL
742 : // then our results are zone[i] for i=0..len-1. Len will be zero
743 : // if the zone data could not be loaded.
744 : int32_t* map;
745 : int32_t* localMap;
746 : int32_t len;
747 : int32_t pos;
748 :
749 0 : TZEnumeration(int32_t* mapData, int32_t mapLen, UBool adoptMapData) : pos(0) {
750 0 : map = mapData;
751 0 : localMap = adoptMapData ? mapData : NULL;
752 0 : len = mapLen;
753 0 : }
754 :
755 0 : UBool getID(int32_t i) {
756 0 : UErrorCode ec = U_ZERO_ERROR;
757 0 : int32_t idLen = 0;
758 0 : const UChar* id = NULL;
759 0 : UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
760 0 : top = ures_getByKey(top, kNAMES, top, &ec); // dereference Zones section
761 0 : id = ures_getStringByIndex(top, i, &idLen, &ec);
762 0 : if(U_FAILURE(ec)) {
763 0 : unistr.truncate(0);
764 : }
765 : else {
766 0 : unistr.fastCopyFrom(UnicodeString(TRUE, id, idLen));
767 : }
768 0 : ures_close(top);
769 0 : return U_SUCCESS(ec);
770 : }
771 :
772 0 : static int32_t* getMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) {
773 0 : len = 0;
774 0 : if (U_FAILURE(ec)) {
775 0 : return NULL;
776 : }
777 0 : int32_t* m = NULL;
778 0 : switch (type) {
779 : case UCAL_ZONE_TYPE_ANY:
780 0 : umtx_initOnce(gSystemZonesInitOnce, &initMap, type, ec);
781 0 : m = MAP_SYSTEM_ZONES;
782 0 : len = LEN_SYSTEM_ZONES;
783 0 : break;
784 : case UCAL_ZONE_TYPE_CANONICAL:
785 0 : umtx_initOnce(gCanonicalZonesInitOnce, &initMap, type, ec);
786 0 : m = MAP_CANONICAL_SYSTEM_ZONES;
787 0 : len = LEN_CANONICAL_SYSTEM_ZONES;
788 0 : break;
789 : case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
790 0 : umtx_initOnce(gCanonicalLocationZonesInitOnce, &initMap, type, ec);
791 0 : m = MAP_CANONICAL_SYSTEM_LOCATION_ZONES;
792 0 : len = LEN_CANONICAL_SYSTEM_LOCATION_ZONES;
793 0 : break;
794 : default:
795 0 : ec = U_ILLEGAL_ARGUMENT_ERROR;
796 0 : m = NULL;
797 0 : len = 0;
798 0 : break;
799 : }
800 0 : return m;
801 : }
802 :
803 : public:
804 :
805 : #define DEFAULT_FILTERED_MAP_SIZE 8
806 : #define MAP_INCREMENT_SIZE 8
807 :
808 0 : static TZEnumeration* create(USystemTimeZoneType type, const char* region, const int32_t* rawOffset, UErrorCode& ec) {
809 0 : if (U_FAILURE(ec)) {
810 0 : return NULL;
811 : }
812 :
813 : int32_t baseLen;
814 0 : int32_t *baseMap = getMap(type, baseLen, ec);
815 :
816 0 : if (U_FAILURE(ec)) {
817 0 : return NULL;
818 : }
819 :
820 : // If any additional conditions are available,
821 : // create instance local map filtered by the conditions.
822 :
823 0 : int32_t *filteredMap = NULL;
824 0 : int32_t numEntries = 0;
825 :
826 0 : if (region != NULL || rawOffset != NULL) {
827 0 : int32_t filteredMapSize = DEFAULT_FILTERED_MAP_SIZE;
828 0 : filteredMap = (int32_t *)uprv_malloc(filteredMapSize * sizeof(int32_t));
829 0 : if (filteredMap == NULL) {
830 0 : ec = U_MEMORY_ALLOCATION_ERROR;
831 0 : return NULL;
832 : }
833 :
834 : // Walk through the base map
835 0 : UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
836 0 : res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
837 0 : for (int32_t i = 0; i < baseLen; i++) {
838 0 : int32_t zidx = baseMap[i];
839 0 : UnicodeString id = ures_getUnicodeStringByIndex(res, zidx, &ec);
840 0 : if (U_FAILURE(ec)) {
841 0 : break;
842 : }
843 0 : if (region != NULL) {
844 : // Filter by region
845 : char tzregion[4]; // max 3 letters + null term
846 0 : TimeZone::getRegion(id, tzregion, sizeof(tzregion), ec);
847 0 : if (U_FAILURE(ec)) {
848 0 : break;
849 : }
850 0 : if (uprv_stricmp(tzregion, region) != 0) {
851 : // region does not match
852 0 : continue;
853 : }
854 : }
855 0 : if (rawOffset != NULL) {
856 : // Filter by raw offset
857 : // Note: This is VERY inefficient
858 0 : TimeZone *z = createSystemTimeZone(id, ec);
859 0 : if (U_FAILURE(ec)) {
860 0 : break;
861 : }
862 0 : int32_t tzoffset = z->getRawOffset();
863 0 : delete z;
864 :
865 0 : if (tzoffset != *rawOffset) {
866 0 : continue;
867 : }
868 : }
869 :
870 0 : if (filteredMapSize <= numEntries) {
871 0 : filteredMapSize += MAP_INCREMENT_SIZE;
872 0 : int32_t *tmp = (int32_t *)uprv_realloc(filteredMap, filteredMapSize * sizeof(int32_t));
873 0 : if (tmp == NULL) {
874 0 : ec = U_MEMORY_ALLOCATION_ERROR;
875 0 : break;
876 : } else {
877 0 : filteredMap = tmp;
878 : }
879 : }
880 :
881 0 : filteredMap[numEntries++] = zidx;
882 : }
883 :
884 0 : if (U_FAILURE(ec)) {
885 0 : uprv_free(filteredMap);
886 0 : filteredMap = NULL;
887 : }
888 :
889 0 : ures_close(res);
890 : }
891 :
892 0 : TZEnumeration *result = NULL;
893 0 : if (U_SUCCESS(ec)) {
894 : // Finally, create a new enumeration instance
895 0 : if (filteredMap == NULL) {
896 0 : result = new TZEnumeration(baseMap, baseLen, FALSE);
897 : } else {
898 0 : result = new TZEnumeration(filteredMap, numEntries, TRUE);
899 0 : filteredMap = NULL;
900 : }
901 0 : if (result == NULL) {
902 0 : ec = U_MEMORY_ALLOCATION_ERROR;
903 : }
904 : }
905 :
906 0 : if (filteredMap != NULL) {
907 0 : uprv_free(filteredMap);
908 : }
909 :
910 0 : return result;
911 : }
912 :
913 0 : TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(NULL), localMap(NULL), len(0), pos(0) {
914 0 : if (other.localMap != NULL) {
915 0 : localMap = (int32_t *)uprv_malloc(other.len * sizeof(int32_t));
916 0 : if (localMap != NULL) {
917 0 : len = other.len;
918 0 : uprv_memcpy(localMap, other.localMap, len * sizeof(int32_t));
919 0 : pos = other.pos;
920 0 : map = localMap;
921 : } else {
922 0 : len = 0;
923 0 : pos = 0;
924 0 : map = NULL;
925 : }
926 : } else {
927 0 : map = other.map;
928 0 : localMap = NULL;
929 0 : len = other.len;
930 0 : pos = other.pos;
931 : }
932 0 : }
933 :
934 : virtual ~TZEnumeration();
935 :
936 0 : virtual StringEnumeration *clone() const {
937 0 : return new TZEnumeration(*this);
938 : }
939 :
940 0 : virtual int32_t count(UErrorCode& status) const {
941 0 : return U_FAILURE(status) ? 0 : len;
942 : }
943 :
944 0 : virtual const UnicodeString* snext(UErrorCode& status) {
945 0 : if (U_SUCCESS(status) && map != NULL && pos < len) {
946 0 : getID(map[pos]);
947 0 : ++pos;
948 0 : return &unistr;
949 : }
950 0 : return 0;
951 : }
952 :
953 0 : virtual void reset(UErrorCode& /*status*/) {
954 0 : pos = 0;
955 0 : }
956 :
957 : public:
958 : static UClassID U_EXPORT2 getStaticClassID(void);
959 : virtual UClassID getDynamicClassID(void) const;
960 : };
961 :
962 0 : TZEnumeration::~TZEnumeration() {
963 0 : if (localMap != NULL) {
964 0 : uprv_free(localMap);
965 : }
966 0 : }
967 :
968 0 : UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)
969 :
970 : StringEnumeration* U_EXPORT2
971 0 : TimeZone::createTimeZoneIDEnumeration(
972 : USystemTimeZoneType zoneType,
973 : const char* region,
974 : const int32_t* rawOffset,
975 : UErrorCode& ec) {
976 0 : return TZEnumeration::create(zoneType, region, rawOffset, ec);
977 : }
978 :
979 : StringEnumeration* U_EXPORT2
980 0 : TimeZone::createEnumeration() {
981 0 : UErrorCode ec = U_ZERO_ERROR;
982 0 : return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, NULL, ec);
983 : }
984 :
985 : StringEnumeration* U_EXPORT2
986 0 : TimeZone::createEnumeration(int32_t rawOffset) {
987 0 : UErrorCode ec = U_ZERO_ERROR;
988 0 : return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, &rawOffset, ec);
989 : }
990 :
991 : StringEnumeration* U_EXPORT2
992 0 : TimeZone::createEnumeration(const char* country) {
993 0 : UErrorCode ec = U_ZERO_ERROR;
994 0 : return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, country, NULL, ec);
995 : }
996 :
997 : // ---------------------------------------
998 :
999 : int32_t U_EXPORT2
1000 0 : TimeZone::countEquivalentIDs(const UnicodeString& id) {
1001 0 : int32_t result = 0;
1002 0 : UErrorCode ec = U_ZERO_ERROR;
1003 : UResourceBundle res;
1004 0 : ures_initStackObject(&res);
1005 : U_DEBUG_TZ_MSG(("countEquivalentIDs..\n"));
1006 0 : UResourceBundle *top = openOlsonResource(id, res, ec);
1007 0 : if (U_SUCCESS(ec)) {
1008 : UResourceBundle r;
1009 0 : ures_initStackObject(&r);
1010 0 : ures_getByKey(&res, kLINKS, &r, &ec);
1011 0 : ures_getIntVector(&r, &result, &ec);
1012 0 : ures_close(&r);
1013 : }
1014 0 : ures_close(&res);
1015 0 : ures_close(top);
1016 0 : return result;
1017 : }
1018 :
1019 : // ---------------------------------------
1020 :
1021 : const UnicodeString U_EXPORT2
1022 0 : TimeZone::getEquivalentID(const UnicodeString& id, int32_t index) {
1023 : U_DEBUG_TZ_MSG(("gEI(%d)\n", index));
1024 0 : UnicodeString result;
1025 0 : UErrorCode ec = U_ZERO_ERROR;
1026 : UResourceBundle res;
1027 0 : ures_initStackObject(&res);
1028 0 : UResourceBundle *top = openOlsonResource(id, res, ec);
1029 0 : int32_t zone = -1;
1030 0 : if (U_SUCCESS(ec)) {
1031 : UResourceBundle r;
1032 0 : ures_initStackObject(&r);
1033 : int32_t size;
1034 0 : ures_getByKey(&res, kLINKS, &r, &ec);
1035 0 : const int32_t* v = ures_getIntVector(&r, &size, &ec);
1036 0 : if (U_SUCCESS(ec)) {
1037 0 : if (index >= 0 && index < size) {
1038 0 : zone = v[index];
1039 : }
1040 : }
1041 0 : ures_close(&r);
1042 : }
1043 0 : ures_close(&res);
1044 0 : if (zone >= 0) {
1045 0 : UResourceBundle *ares = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Zones section
1046 0 : if (U_SUCCESS(ec)) {
1047 0 : int32_t idLen = 0;
1048 0 : const UChar* id = ures_getStringByIndex(ares, zone, &idLen, &ec);
1049 0 : result.fastCopyFrom(UnicodeString(TRUE, id, idLen));
1050 : U_DEBUG_TZ_MSG(("gei(%d) -> %d, len%d, %s\n", index, zone, result.length(), u_errorName(ec)));
1051 : }
1052 0 : ures_close(ares);
1053 : }
1054 0 : ures_close(top);
1055 : #if defined(U_DEBUG_TZ)
1056 : if(result.length() ==0) {
1057 : U_DEBUG_TZ_MSG(("equiv [__, #%d] -> 0 (%s)\n", index, u_errorName(ec)));
1058 : }
1059 : #endif
1060 0 : return result;
1061 : }
1062 :
1063 : // ---------------------------------------
1064 :
1065 : // These methods are used by ZoneMeta class only.
1066 :
1067 : const UChar*
1068 0 : TimeZone::findID(const UnicodeString& id) {
1069 0 : const UChar *result = NULL;
1070 0 : UErrorCode ec = U_ZERO_ERROR;
1071 0 : UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1072 :
1073 : // resolve zone index by name
1074 0 : UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1075 0 : int32_t idx = findInStringArray(names, id, ec);
1076 0 : result = ures_getStringByIndex(names, idx, NULL, &ec);
1077 0 : if (U_FAILURE(ec)) {
1078 0 : result = NULL;
1079 : }
1080 0 : ures_close(names);
1081 0 : ures_close(rb);
1082 0 : return result;
1083 : }
1084 :
1085 :
1086 : const UChar*
1087 0 : TimeZone::dereferOlsonLink(const UnicodeString& id) {
1088 0 : const UChar *result = NULL;
1089 0 : UErrorCode ec = U_ZERO_ERROR;
1090 0 : UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1091 :
1092 : // resolve zone index by name
1093 0 : UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1094 0 : int32_t idx = findInStringArray(names, id, ec);
1095 0 : result = ures_getStringByIndex(names, idx, NULL, &ec);
1096 :
1097 : // open the zone bundle by index
1098 0 : ures_getByKey(rb, kZONES, rb, &ec);
1099 0 : ures_getByIndex(rb, idx, rb, &ec);
1100 :
1101 0 : if (U_SUCCESS(ec)) {
1102 0 : if (ures_getType(rb) == URES_INT) {
1103 : // this is a link - dereference the link
1104 0 : int32_t deref = ures_getInt(rb, &ec);
1105 0 : const UChar* tmp = ures_getStringByIndex(names, deref, NULL, &ec);
1106 0 : if (U_SUCCESS(ec)) {
1107 0 : result = tmp;
1108 : }
1109 : }
1110 : }
1111 :
1112 0 : ures_close(names);
1113 0 : ures_close(rb);
1114 :
1115 0 : return result;
1116 : }
1117 :
1118 : const UChar*
1119 0 : TimeZone::getRegion(const UnicodeString& id) {
1120 0 : UErrorCode status = U_ZERO_ERROR;
1121 0 : return getRegion(id, status);
1122 : }
1123 :
1124 : const UChar*
1125 0 : TimeZone::getRegion(const UnicodeString& id, UErrorCode& status) {
1126 0 : if (U_FAILURE(status)) {
1127 0 : return NULL;
1128 : }
1129 0 : const UChar *result = NULL;
1130 0 : UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &status);
1131 :
1132 : // resolve zone index by name
1133 0 : UResourceBundle *res = ures_getByKey(rb, kNAMES, NULL, &status);
1134 0 : int32_t idx = findInStringArray(res, id, status);
1135 :
1136 : // get region mapping
1137 0 : ures_getByKey(rb, kREGIONS, res, &status);
1138 0 : const UChar *tmp = ures_getStringByIndex(res, idx, NULL, &status);
1139 0 : if (U_SUCCESS(status)) {
1140 0 : result = tmp;
1141 : }
1142 :
1143 0 : ures_close(res);
1144 0 : ures_close(rb);
1145 :
1146 0 : return result;
1147 : }
1148 :
1149 :
1150 : // ---------------------------------------
1151 : int32_t
1152 0 : TimeZone::getRegion(const UnicodeString& id, char *region, int32_t capacity, UErrorCode& status)
1153 : {
1154 0 : int32_t resultLen = 0;
1155 0 : *region = 0;
1156 0 : if (U_FAILURE(status)) {
1157 0 : return 0;
1158 : }
1159 :
1160 0 : const UChar *uregion = NULL;
1161 : // "Etc/Unknown" is not a system zone ID,
1162 : // but in the zone data
1163 0 : if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) != 0) {
1164 0 : uregion = getRegion(id);
1165 : }
1166 0 : if (uregion == NULL) {
1167 0 : status = U_ILLEGAL_ARGUMENT_ERROR;
1168 0 : return 0;
1169 : }
1170 0 : resultLen = u_strlen(uregion);
1171 : // A region code is represented by invariant characters
1172 0 : u_UCharsToChars(uregion, region, uprv_min(resultLen, capacity));
1173 :
1174 0 : if (capacity < resultLen) {
1175 0 : status = U_BUFFER_OVERFLOW_ERROR;
1176 0 : return resultLen;
1177 : }
1178 :
1179 0 : return u_terminateChars(region, capacity, resultLen, &status);
1180 : }
1181 :
1182 : // ---------------------------------------
1183 :
1184 :
1185 : UnicodeString&
1186 0 : TimeZone::getDisplayName(UnicodeString& result) const
1187 : {
1188 0 : return getDisplayName(FALSE,LONG,Locale::getDefault(), result);
1189 : }
1190 :
1191 : UnicodeString&
1192 0 : TimeZone::getDisplayName(const Locale& locale, UnicodeString& result) const
1193 : {
1194 0 : return getDisplayName(FALSE, LONG, locale, result);
1195 : }
1196 :
1197 : UnicodeString&
1198 0 : TimeZone::getDisplayName(UBool daylight, EDisplayType style, UnicodeString& result) const
1199 : {
1200 0 : return getDisplayName(daylight,style, Locale::getDefault(), result);
1201 : }
1202 : //--------------------------------------
1203 : int32_t
1204 0 : TimeZone::getDSTSavings()const {
1205 0 : if (useDaylightTime()) {
1206 0 : return 3600000;
1207 : }
1208 0 : return 0;
1209 : }
1210 : //---------------------------------------
1211 : UnicodeString&
1212 0 : TimeZone::getDisplayName(UBool daylight, EDisplayType style, const Locale& locale, UnicodeString& result) const
1213 : {
1214 0 : UErrorCode status = U_ZERO_ERROR;
1215 0 : UDate date = Calendar::getNow();
1216 : UTimeZoneFormatTimeType timeType;
1217 : int32_t offset;
1218 :
1219 0 : if (style == GENERIC_LOCATION || style == LONG_GENERIC || style == SHORT_GENERIC) {
1220 0 : LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1221 0 : if (U_FAILURE(status)) {
1222 0 : result.remove();
1223 0 : return result;
1224 : }
1225 : // Generic format
1226 0 : switch (style) {
1227 : case GENERIC_LOCATION:
1228 0 : tzfmt->format(UTZFMT_STYLE_GENERIC_LOCATION, *this, date, result, &timeType);
1229 0 : break;
1230 : case LONG_GENERIC:
1231 0 : tzfmt->format(UTZFMT_STYLE_GENERIC_LONG, *this, date, result, &timeType);
1232 0 : break;
1233 : case SHORT_GENERIC:
1234 0 : tzfmt->format(UTZFMT_STYLE_GENERIC_SHORT, *this, date, result, &timeType);
1235 0 : break;
1236 : default:
1237 0 : U_ASSERT(FALSE);
1238 : }
1239 : // Generic format many use Localized GMT as the final fallback.
1240 : // When Localized GMT format is used, the result might not be
1241 : // appropriate for the requested daylight value.
1242 0 : if ((daylight && timeType == UTZFMT_TIME_TYPE_STANDARD) || (!daylight && timeType == UTZFMT_TIME_TYPE_DAYLIGHT)) {
1243 0 : offset = daylight ? getRawOffset() + getDSTSavings() : getRawOffset();
1244 0 : if (style == SHORT_GENERIC) {
1245 0 : tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1246 : } else {
1247 0 : tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1248 : }
1249 0 : }
1250 0 : } else if (style == LONG_GMT || style == SHORT_GMT) {
1251 0 : LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1252 0 : if (U_FAILURE(status)) {
1253 0 : result.remove();
1254 0 : return result;
1255 : }
1256 0 : offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1257 0 : switch (style) {
1258 : case LONG_GMT:
1259 0 : tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1260 0 : break;
1261 : case SHORT_GMT:
1262 0 : tzfmt->formatOffsetISO8601Basic(offset, FALSE, FALSE, FALSE, result, status);
1263 0 : break;
1264 : default:
1265 0 : U_ASSERT(FALSE);
1266 0 : }
1267 :
1268 : } else {
1269 0 : U_ASSERT(style == LONG || style == SHORT || style == SHORT_COMMONLY_USED);
1270 0 : UTimeZoneNameType nameType = UTZNM_UNKNOWN;
1271 0 : switch (style) {
1272 : case LONG:
1273 0 : nameType = daylight ? UTZNM_LONG_DAYLIGHT : UTZNM_LONG_STANDARD;
1274 0 : break;
1275 : case SHORT:
1276 : case SHORT_COMMONLY_USED:
1277 0 : nameType = daylight ? UTZNM_SHORT_DAYLIGHT : UTZNM_SHORT_STANDARD;
1278 0 : break;
1279 : default:
1280 0 : U_ASSERT(FALSE);
1281 : }
1282 0 : LocalPointer<TimeZoneNames> tznames(TimeZoneNames::createInstance(locale, status));
1283 0 : if (U_FAILURE(status)) {
1284 0 : result.remove();
1285 0 : return result;
1286 : }
1287 0 : UnicodeString canonicalID(ZoneMeta::getCanonicalCLDRID(*this));
1288 0 : tznames->getDisplayName(canonicalID, nameType, date, result);
1289 0 : if (result.isEmpty()) {
1290 : // Fallback to localized GMT
1291 0 : LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1292 0 : offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1293 0 : if (style == LONG) {
1294 0 : tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1295 : } else {
1296 0 : tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1297 : }
1298 : }
1299 : }
1300 0 : if (U_FAILURE(status)) {
1301 0 : result.remove();
1302 : }
1303 0 : return result;
1304 : }
1305 :
1306 : /**
1307 : * Parse a custom time zone identifier and return a corresponding zone.
1308 : * @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
1309 : * GMT[+-]hh.
1310 : * @return a newly created SimpleTimeZone with the given offset and
1311 : * no Daylight Savings Time, or null if the id cannot be parsed.
1312 : */
1313 : TimeZone*
1314 0 : TimeZone::createCustomTimeZone(const UnicodeString& id)
1315 : {
1316 : int32_t sign, hour, min, sec;
1317 0 : if (parseCustomID(id, sign, hour, min, sec)) {
1318 0 : UnicodeString customID;
1319 0 : formatCustomID(hour, min, sec, (sign < 0), customID);
1320 0 : int32_t offset = sign * ((hour * 60 + min) * 60 + sec) * 1000;
1321 0 : return new SimpleTimeZone(offset, customID);
1322 : }
1323 0 : return NULL;
1324 : }
1325 :
1326 : UnicodeString&
1327 0 : TimeZone::getCustomID(const UnicodeString& id, UnicodeString& normalized, UErrorCode& status) {
1328 0 : normalized.remove();
1329 0 : if (U_FAILURE(status)) {
1330 0 : return normalized;
1331 : }
1332 : int32_t sign, hour, min, sec;
1333 0 : if (parseCustomID(id, sign, hour, min, sec)) {
1334 0 : formatCustomID(hour, min, sec, (sign < 0), normalized);
1335 : } else {
1336 0 : status = U_ILLEGAL_ARGUMENT_ERROR;
1337 : }
1338 0 : return normalized;
1339 : }
1340 :
1341 : UBool
1342 0 : TimeZone::parseCustomID(const UnicodeString& id, int32_t& sign,
1343 : int32_t& hour, int32_t& min, int32_t& sec) {
1344 : static const int32_t kParseFailed = -99999;
1345 :
1346 0 : NumberFormat* numberFormat = 0;
1347 0 : UnicodeString idUppercase = id;
1348 0 : idUppercase.toUpper("");
1349 :
1350 0 : if (id.length() > GMT_ID_LENGTH &&
1351 0 : idUppercase.startsWith(GMT_ID, GMT_ID_LENGTH))
1352 : {
1353 0 : ParsePosition pos(GMT_ID_LENGTH);
1354 0 : sign = 1;
1355 0 : hour = 0;
1356 0 : min = 0;
1357 0 : sec = 0;
1358 :
1359 0 : if (id[pos.getIndex()] == MINUS /*'-'*/) {
1360 0 : sign = -1;
1361 0 : } else if (id[pos.getIndex()] != PLUS /*'+'*/) {
1362 0 : return FALSE;
1363 : }
1364 0 : pos.setIndex(pos.getIndex() + 1);
1365 :
1366 0 : UErrorCode success = U_ZERO_ERROR;
1367 0 : numberFormat = NumberFormat::createInstance(success);
1368 0 : if(U_FAILURE(success)){
1369 0 : return FALSE;
1370 : }
1371 0 : numberFormat->setParseIntegerOnly(TRUE);
1372 : //numberFormat->setLenient(TRUE); // TODO: May need to set this, depends on latest timezone parsing
1373 :
1374 : // Look for either hh:mm, hhmm, or hh
1375 0 : int32_t start = pos.getIndex();
1376 0 : Formattable n(kParseFailed);
1377 0 : numberFormat->parse(id, n, pos);
1378 0 : if (pos.getIndex() == start) {
1379 0 : delete numberFormat;
1380 0 : return FALSE;
1381 : }
1382 0 : hour = n.getLong();
1383 :
1384 0 : if (pos.getIndex() < id.length()) {
1385 0 : if (pos.getIndex() - start > 2
1386 0 : || id[pos.getIndex()] != COLON) {
1387 0 : delete numberFormat;
1388 0 : return FALSE;
1389 : }
1390 : // hh:mm
1391 0 : pos.setIndex(pos.getIndex() + 1);
1392 0 : int32_t oldPos = pos.getIndex();
1393 0 : n.setLong(kParseFailed);
1394 0 : numberFormat->parse(id, n, pos);
1395 0 : if ((pos.getIndex() - oldPos) != 2) {
1396 : // must be 2 digits
1397 0 : delete numberFormat;
1398 0 : return FALSE;
1399 : }
1400 0 : min = n.getLong();
1401 0 : if (pos.getIndex() < id.length()) {
1402 0 : if (id[pos.getIndex()] != COLON) {
1403 0 : delete numberFormat;
1404 0 : return FALSE;
1405 : }
1406 : // [:ss]
1407 0 : pos.setIndex(pos.getIndex() + 1);
1408 0 : oldPos = pos.getIndex();
1409 0 : n.setLong(kParseFailed);
1410 0 : numberFormat->parse(id, n, pos);
1411 0 : if (pos.getIndex() != id.length()
1412 0 : || (pos.getIndex() - oldPos) != 2) {
1413 0 : delete numberFormat;
1414 0 : return FALSE;
1415 : }
1416 0 : sec = n.getLong();
1417 : }
1418 : } else {
1419 : // Supported formats are below -
1420 : //
1421 : // HHmmss
1422 : // Hmmss
1423 : // HHmm
1424 : // Hmm
1425 : // HH
1426 : // H
1427 :
1428 0 : int32_t length = pos.getIndex() - start;
1429 0 : if (length <= 0 || 6 < length) {
1430 : // invalid length
1431 0 : delete numberFormat;
1432 0 : return FALSE;
1433 : }
1434 0 : switch (length) {
1435 : case 1:
1436 : case 2:
1437 : // already set to hour
1438 0 : break;
1439 : case 3:
1440 : case 4:
1441 0 : min = hour % 100;
1442 0 : hour /= 100;
1443 0 : break;
1444 : case 5:
1445 : case 6:
1446 0 : sec = hour % 100;
1447 0 : min = (hour/100) % 100;
1448 0 : hour /= 10000;
1449 0 : break;
1450 : }
1451 : }
1452 :
1453 0 : delete numberFormat;
1454 :
1455 0 : if (hour > kMAX_CUSTOM_HOUR || min > kMAX_CUSTOM_MIN || sec > kMAX_CUSTOM_SEC) {
1456 0 : return FALSE;
1457 : }
1458 0 : return TRUE;
1459 : }
1460 0 : return FALSE;
1461 : }
1462 :
1463 : UnicodeString&
1464 0 : TimeZone::formatCustomID(int32_t hour, int32_t min, int32_t sec,
1465 : UBool negative, UnicodeString& id) {
1466 : // Create time zone ID - GMT[+|-]hhmm[ss]
1467 0 : id.setTo(GMT_ID, GMT_ID_LENGTH);
1468 0 : if (hour | min | sec) {
1469 0 : if (negative) {
1470 0 : id += (UChar)MINUS;
1471 : } else {
1472 0 : id += (UChar)PLUS;
1473 : }
1474 :
1475 0 : if (hour < 10) {
1476 0 : id += (UChar)ZERO_DIGIT;
1477 : } else {
1478 0 : id += (UChar)(ZERO_DIGIT + hour/10);
1479 : }
1480 0 : id += (UChar)(ZERO_DIGIT + hour%10);
1481 0 : id += (UChar)COLON;
1482 0 : if (min < 10) {
1483 0 : id += (UChar)ZERO_DIGIT;
1484 : } else {
1485 0 : id += (UChar)(ZERO_DIGIT + min/10);
1486 : }
1487 0 : id += (UChar)(ZERO_DIGIT + min%10);
1488 :
1489 0 : if (sec) {
1490 0 : id += (UChar)COLON;
1491 0 : if (sec < 10) {
1492 0 : id += (UChar)ZERO_DIGIT;
1493 : } else {
1494 0 : id += (UChar)(ZERO_DIGIT + sec/10);
1495 : }
1496 0 : id += (UChar)(ZERO_DIGIT + sec%10);
1497 : }
1498 : }
1499 0 : return id;
1500 : }
1501 :
1502 :
1503 : UBool
1504 0 : TimeZone::hasSameRules(const TimeZone& other) const
1505 : {
1506 0 : return (getRawOffset() == other.getRawOffset() &&
1507 0 : useDaylightTime() == other.useDaylightTime());
1508 : }
1509 :
1510 0 : static void U_CALLCONV initTZDataVersion(UErrorCode &status) {
1511 0 : ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
1512 0 : int32_t len = 0;
1513 0 : UResourceBundle *bundle = ures_openDirect(NULL, kZONEINFO, &status);
1514 0 : const UChar *tzver = ures_getStringByKey(bundle, kTZVERSION, &len, &status);
1515 :
1516 0 : if (U_SUCCESS(status)) {
1517 0 : if (len >= (int32_t)sizeof(TZDATA_VERSION)) {
1518 : // Ensure that there is always space for a trailing nul in TZDATA_VERSION
1519 0 : len = sizeof(TZDATA_VERSION) - 1;
1520 : }
1521 0 : u_UCharsToChars(tzver, TZDATA_VERSION, len);
1522 : }
1523 0 : ures_close(bundle);
1524 :
1525 0 : }
1526 :
1527 : const char*
1528 0 : TimeZone::getTZDataVersion(UErrorCode& status)
1529 : {
1530 0 : umtx_initOnce(gTZDataVersionInitOnce, &initTZDataVersion, status);
1531 0 : return (const char*)TZDATA_VERSION;
1532 : }
1533 :
1534 : UnicodeString&
1535 0 : TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UErrorCode& status)
1536 : {
1537 0 : UBool isSystemID = FALSE;
1538 0 : return getCanonicalID(id, canonicalID, isSystemID, status);
1539 : }
1540 :
1541 : UnicodeString&
1542 0 : TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UBool& isSystemID,
1543 : UErrorCode& status)
1544 : {
1545 0 : canonicalID.remove();
1546 0 : isSystemID = FALSE;
1547 0 : if (U_FAILURE(status)) {
1548 0 : return canonicalID;
1549 : }
1550 0 : if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) == 0) {
1551 : // special case - Etc/Unknown is a canonical ID, but not system ID
1552 0 : canonicalID.fastCopyFrom(id);
1553 0 : isSystemID = FALSE;
1554 : } else {
1555 0 : ZoneMeta::getCanonicalCLDRID(id, canonicalID, status);
1556 0 : if (U_SUCCESS(status)) {
1557 0 : isSystemID = TRUE;
1558 : } else {
1559 : // Not a system ID
1560 0 : status = U_ZERO_ERROR;
1561 0 : getCustomID(id, canonicalID, status);
1562 : }
1563 : }
1564 0 : return canonicalID;
1565 : }
1566 :
1567 : UnicodeString&
1568 0 : TimeZone::getWindowsID(const UnicodeString& id, UnicodeString& winid, UErrorCode& status) {
1569 0 : winid.remove();
1570 0 : if (U_FAILURE(status)) {
1571 0 : return winid;
1572 : }
1573 :
1574 : // canonicalize the input ID
1575 0 : UnicodeString canonicalID;
1576 0 : UBool isSystemID = FALSE;
1577 :
1578 0 : getCanonicalID(id, canonicalID, isSystemID, status);
1579 0 : if (U_FAILURE(status) || !isSystemID) {
1580 : // mapping data is only applicable to tz database IDs
1581 0 : if (status == U_ILLEGAL_ARGUMENT_ERROR) {
1582 : // getWindowsID() sets an empty string where
1583 : // getCanonicalID() sets a U_ILLEGAL_ARGUMENT_ERROR.
1584 0 : status = U_ZERO_ERROR;
1585 : }
1586 0 : return winid;
1587 : }
1588 :
1589 0 : UResourceBundle *mapTimezones = ures_openDirect(NULL, "windowsZones", &status);
1590 0 : ures_getByKey(mapTimezones, "mapTimezones", mapTimezones, &status);
1591 :
1592 0 : if (U_FAILURE(status)) {
1593 0 : return winid;
1594 : }
1595 :
1596 0 : UResourceBundle *winzone = NULL;
1597 0 : UBool found = FALSE;
1598 0 : while (ures_hasNext(mapTimezones) && !found) {
1599 0 : winzone = ures_getNextResource(mapTimezones, winzone, &status);
1600 0 : if (U_FAILURE(status)) {
1601 0 : break;
1602 : }
1603 0 : if (ures_getType(winzone) != URES_TABLE) {
1604 0 : continue;
1605 : }
1606 0 : UResourceBundle *regionalData = NULL;
1607 0 : while (ures_hasNext(winzone) && !found) {
1608 0 : regionalData = ures_getNextResource(winzone, regionalData, &status);
1609 0 : if (U_FAILURE(status)) {
1610 0 : break;
1611 : }
1612 0 : if (ures_getType(regionalData) != URES_STRING) {
1613 0 : continue;
1614 : }
1615 : int32_t len;
1616 0 : const UChar *tzids = ures_getString(regionalData, &len, &status);
1617 0 : if (U_FAILURE(status)) {
1618 0 : break;
1619 : }
1620 :
1621 0 : const UChar *start = tzids;
1622 0 : UBool hasNext = TRUE;
1623 0 : while (hasNext) {
1624 0 : const UChar *end = u_strchr(start, (UChar)0x20);
1625 0 : if (end == NULL) {
1626 0 : end = tzids + len;
1627 0 : hasNext = FALSE;
1628 : }
1629 0 : if (canonicalID.compare(start, end - start) == 0) {
1630 0 : winid = UnicodeString(ures_getKey(winzone), -1 , US_INV);
1631 0 : found = TRUE;
1632 0 : break;
1633 : }
1634 0 : start = end + 1;
1635 : }
1636 : }
1637 0 : ures_close(regionalData);
1638 : }
1639 0 : ures_close(winzone);
1640 0 : ures_close(mapTimezones);
1641 :
1642 0 : return winid;
1643 : }
1644 :
1645 : #define MAX_WINDOWS_ID_SIZE 128
1646 :
1647 : UnicodeString&
1648 0 : TimeZone::getIDForWindowsID(const UnicodeString& winid, const char* region, UnicodeString& id, UErrorCode& status) {
1649 0 : id.remove();
1650 0 : if (U_FAILURE(status)) {
1651 0 : return id;
1652 : }
1653 :
1654 0 : UResourceBundle *zones = ures_openDirect(NULL, "windowsZones", &status);
1655 0 : ures_getByKey(zones, "mapTimezones", zones, &status);
1656 0 : if (U_FAILURE(status)) {
1657 0 : ures_close(zones);
1658 0 : return id;
1659 : }
1660 :
1661 0 : UErrorCode tmperr = U_ZERO_ERROR;
1662 : char winidKey[MAX_WINDOWS_ID_SIZE];
1663 0 : int32_t winKeyLen = winid.extract(0, winid.length(), winidKey, sizeof(winidKey) - 1, US_INV);
1664 :
1665 0 : if (winKeyLen == 0 || winKeyLen >= (int32_t)sizeof(winidKey)) {
1666 0 : ures_close(zones);
1667 0 : return id;
1668 : }
1669 0 : winidKey[winKeyLen] = 0;
1670 :
1671 0 : ures_getByKey(zones, winidKey, zones, &tmperr); // use tmperr, because windows mapping might not
1672 : // be avaiable by design
1673 0 : if (U_FAILURE(tmperr)) {
1674 0 : ures_close(zones);
1675 0 : return id;
1676 : }
1677 :
1678 0 : const UChar *tzid = NULL;
1679 0 : int32_t len = 0;
1680 0 : UBool gotID = FALSE;
1681 0 : if (region) {
1682 0 : const UChar *tzids = ures_getStringByKey(zones, region, &len, &tmperr); // use tmperr, because
1683 : // regional mapping is optional
1684 0 : if (U_SUCCESS(tmperr)) {
1685 : // first ID delimited by space is the defasult one
1686 0 : const UChar *end = u_strchr(tzids, (UChar)0x20);
1687 0 : if (end == NULL) {
1688 0 : id.setTo(tzids, -1);
1689 : } else {
1690 0 : id.setTo(tzids, end - tzids);
1691 : }
1692 0 : gotID = TRUE;
1693 : }
1694 : }
1695 :
1696 0 : if (!gotID) {
1697 0 : tzid = ures_getStringByKey(zones, "001", &len, &status); // using status, because "001" must be
1698 : // available at this point
1699 0 : if (U_SUCCESS(status)) {
1700 0 : id.setTo(tzid, len);
1701 : }
1702 : }
1703 :
1704 0 : ures_close(zones);
1705 0 : return id;
1706 : }
1707 :
1708 :
1709 : U_NAMESPACE_END
1710 :
1711 : #endif /* #if !UCONFIG_NO_FORMATTING */
1712 :
1713 : //eof
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