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
51static void debug_tz_loc(const char *f, int32_t l)
52{
53 fprintf(stderr, "%s:%d: ", f, l);
54}
55
56static 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}
63static 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
108static const UChar WORLD[] = {0x30, 0x30, 0x31, 0x00}; /* "001" */
109
110static const UChar GMT_ID[] = {0x47, 0x4D, 0x54, 0x00}; /* "GMT" */
111static const UChar UNKNOWN_ZONE_ID[] = {0x45, 0x74, 0x63, 0x2F, 0x55, 0x6E, 0x6B, 0x6E, 0x6F, 0x77, 0x6E, 0x00}; /* "Etc/Unknown" */
112static const int32_t GMT_ID_LENGTH = 3;
113static const int32_t UNKNOWN_ZONE_ID_LENGTH = 11;
114
115static icu::TimeZone* DEFAULT_ZONE = NULL;
116static icu::UInitOnce gDefaultZoneInitOnce = U_INITONCE_INITIALIZER;
117
118alignas(icu::SimpleTimeZone)
119static char gRawGMT[sizeof(icu::SimpleTimeZone)];
120
121alignas(icu::SimpleTimeZone)
122static char gRawUNKNOWN[sizeof(icu::SimpleTimeZone)];
123
124static icu::UInitOnce gStaticZonesInitOnce = U_INITONCE_INITIALIZER;
125static UBool gStaticZonesInitialized = FALSE; // Whether the static zones are initialized and ready to use.
126
127static char TZDATA_VERSION[16];
128static icu::UInitOnce gTZDataVersionInitOnce = U_INITONCE_INITIALIZER;
129
130static int32_t* MAP_SYSTEM_ZONES = NULL;
131static int32_t* MAP_CANONICAL_SYSTEM_ZONES = NULL;
132static int32_t* MAP_CANONICAL_SYSTEM_LOCATION_ZONES = NULL;
133
134static int32_t LEN_SYSTEM_ZONES = 0;
135static int32_t LEN_CANONICAL_SYSTEM_ZONES = 0;
136static int32_t LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
137
138static icu::UInitOnce gSystemZonesInitOnce = U_INITONCE_INITIALIZER;
139static icu::UInitOnce gCanonicalZonesInitOnce = U_INITONCE_INITIALIZER;
140static icu::UInitOnce gCanonicalLocationZonesInitOnce = U_INITONCE_INITIALIZER;
141
142U_CDECL_BEGIN
143static UBool U_CALLCONV timeZone_cleanup(void)
144{
145 U_NAMESPACE_USE
146 delete DEFAULT_ZONE;
147 DEFAULT_ZONE = NULL;
148 gDefaultZoneInitOnce.reset();
149
150 if (gStaticZonesInitialized) {
151 reinterpret_cast<SimpleTimeZone*>(gRawGMT)->~SimpleTimeZone();
152 reinterpret_cast<SimpleTimeZone*>(gRawUNKNOWN)->~SimpleTimeZone();
153 gStaticZonesInitialized = FALSE;
154 gStaticZonesInitOnce.reset();
155 }
156
157 uprv_memset(TZDATA_VERSION, 0, sizeof(TZDATA_VERSION));
158 gTZDataVersionInitOnce.reset();
159
160 LEN_SYSTEM_ZONES = 0;
161 uprv_free(MAP_SYSTEM_ZONES);
162 MAP_SYSTEM_ZONES = 0;
163 gSystemZonesInitOnce.reset();
164
165 LEN_CANONICAL_SYSTEM_ZONES = 0;
166 uprv_free(MAP_CANONICAL_SYSTEM_ZONES);
167 MAP_CANONICAL_SYSTEM_ZONES = 0;
168 gCanonicalZonesInitOnce.reset();
169
170 LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
171 uprv_free(MAP_CANONICAL_SYSTEM_LOCATION_ZONES);
172 MAP_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
173 gCanonicalLocationZonesInitOnce.reset();
174
175 return TRUE;
176}
177U_CDECL_END
178
179U_NAMESPACE_BEGIN
180
181static int32_t findInStringArray(UResourceBundle* array, const UnicodeString& id, UErrorCode &status)
182{
183 UnicodeString copy;
184 const UChar *u;
185 int32_t len;
186
187 int32_t start = 0;
188 int32_t limit = ures_getSize(array);
189 int32_t mid;
190 int32_t lastMid = INT32_MAX;
191 if(U_FAILURE(status) || (limit < 1)) {
192 return -1;
193 }
194 U_DEBUG_TZ_MSG(("fisa: Looking for %s, between %d and %d\n", U_DEBUG_TZ_STR(UnicodeString(id).getTerminatedBuffer()), start, limit));
195
196 for (;;) {
197 mid = (int32_t)((start + limit) / 2);
198 if (lastMid == mid) { /* Have we moved? */
199 break; /* We haven't moved, and it wasn't found. */
200 }
201 lastMid = mid;
202 u = ures_getStringByIndex(array, mid, &len, &status);
203 if (U_FAILURE(status)) {
204 break;
205 }
206 U_DEBUG_TZ_MSG(("tz: compare to %s, %d .. [%d] .. %d\n", U_DEBUG_TZ_STR(u), start, mid, limit));
207 copy.setTo(TRUE, u, len);
208 int r = id.compare(copy);
209 if(r==0) {
210 U_DEBUG_TZ_MSG(("fisa: found at %d\n", mid));
211 return mid;
212 } else if(r<0) {
213 limit = mid;
214 } else {
215 start = mid;
216 }
217 }
218 U_DEBUG_TZ_MSG(("fisa: not found\n"));
219 return -1;
220}
221
222/**
223 * Fetch a specific zone by name. Replaces the getByKey call.
224 * @param top Top timezone resource
225 * @param id Time zone ID
226 * @param oldbundle Bundle for reuse (or NULL). see 'ures_open()'
227 * @return the zone's bundle if found, or undefined if error. Reuses oldbundle.
228 */
229static UResourceBundle* getZoneByName(const UResourceBundle* top, const UnicodeString& id, UResourceBundle *oldbundle, UErrorCode& status) {
230 // load the Rules object
231 UResourceBundle *tmp = ures_getByKey(top, kNAMES, NULL, &status);
232
233 // search for the string
234 int32_t idx = findInStringArray(tmp, id, status);
235
236 if((idx == -1) && U_SUCCESS(status)) {
237 // not found
238 status = U_MISSING_RESOURCE_ERROR;
239 //ures_close(oldbundle);
240 //oldbundle = NULL;
241 } else {
242 U_DEBUG_TZ_MSG(("gzbn: oldbundle= size %d, type %d, %s\n", ures_getSize(tmp), ures_getType(tmp), u_errorName(status)));
243 tmp = ures_getByKey(top, kZONES, tmp, &status); // get Zones object from top
244 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)));
245 oldbundle = ures_getByIndex(tmp, idx, oldbundle, &status); // get nth Zone object
246 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)));
247 }
248 ures_close(tmp);
249 if(U_FAILURE(status)) {
250 //ures_close(oldbundle);
251 return NULL;
252 } else {
253 return oldbundle;
254 }
255}
256
257
258UResourceBundle* TimeZone::loadRule(const UResourceBundle* top, const UnicodeString& ruleid, UResourceBundle* oldbundle, UErrorCode& status) {
259 char key[64];
260 ruleid.extract(0, sizeof(key)-1, key, (int32_t)sizeof(key)-1, US_INV);
261 U_DEBUG_TZ_MSG(("loadRule(%s)\n", key));
262 UResourceBundle *r = ures_getByKey(top, kRULES, oldbundle, &status);
263 U_DEBUG_TZ_MSG(("loadRule(%s) -> kRULES [%s]\n", key, u_errorName(status)));
264 r = ures_getByKey(r, key, r, &status);
265 U_DEBUG_TZ_MSG(("loadRule(%s) -> item [%s]\n", key, u_errorName(status)));
266 return r;
267}
268
269/**
270 * Given an ID, open the appropriate resource for the given time zone.
271 * Dereference aliases if necessary.
272 * @param id zone id
273 * @param res resource, which must be ready for use (initialized but not open)
274 * @param ec input-output error code
275 * @return top-level resource bundle
276 */
277static UResourceBundle* openOlsonResource(const UnicodeString& id,
278 UResourceBundle& res,
279 UErrorCode& ec)
280{
281#ifdef U_DEBUG_TZ
282 char buf[128];
283 id.extract(0, sizeof(buf)-1, buf, sizeof(buf), "");
284#endif
285 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
286 U_DEBUG_TZ_MSG(("pre: res sz=%d\n", ures_getSize(&res)));
287 /* &res = */ getZoneByName(top, id, &res, ec);
288 // Dereference if this is an alias. Docs say result should be 1
289 // but it is 0 in 2.8 (?).
290 U_DEBUG_TZ_MSG(("Loading zone '%s' (%s, size %d) - %s\n", buf, ures_getKey((UResourceBundle*)&res), ures_getSize(&res), u_errorName(ec)));
291 if (ures_getType(&res) == URES_INT) {
292 int32_t deref = ures_getInt(&res, &ec) + 0;
293 U_DEBUG_TZ_MSG(("getInt: %s - type is %d\n", u_errorName(ec), ures_getType(&res)));
294 UResourceBundle *ares = ures_getByKey(top, kZONES, NULL, &ec); // dereference Zones section
295 ures_getByIndex(ares, deref, &res, &ec);
296 ures_close(ares);
297 U_DEBUG_TZ_MSG(("alias to #%d (%s) - %s\n", deref, "??", u_errorName(ec)));
298 } else {
299 U_DEBUG_TZ_MSG(("not an alias - size %d\n", ures_getSize(&res)));
300 }
301 U_DEBUG_TZ_MSG(("%s - final status is %s\n", buf, u_errorName(ec)));
302 return top;
303}
304
305// -------------------------------------
306
307namespace {
308
309void U_CALLCONV initStaticTimeZones() {
310 // Initialize _GMT independently of other static data; it should
311 // be valid even if we can't load the time zone UDataMemory.
312 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
313
314 // new can't fail below, as we use placement new into staticly allocated space.
315 new(gRawGMT) SimpleTimeZone(0, UnicodeString(TRUE, GMT_ID, GMT_ID_LENGTH));
316 new(gRawUNKNOWN) SimpleTimeZone(0, UnicodeString(TRUE, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH));
317
318 gStaticZonesInitialized = TRUE;
319}
320
321} // anonymous namespace
322
323const TimeZone& U_EXPORT2
324TimeZone::getUnknown()
325{
326 umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
327 return *reinterpret_cast<SimpleTimeZone*>(gRawUNKNOWN);
328}
329
330const TimeZone* U_EXPORT2
331TimeZone::getGMT(void)
332{
333 umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
334 return reinterpret_cast<SimpleTimeZone*>(gRawGMT);
335}
336
337// *****************************************************************************
338// class TimeZone
339// *****************************************************************************
340
341UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)
342
343TimeZone::TimeZone()
344 : UObject(), fID()
345{
346}
347
348// -------------------------------------
349
350TimeZone::TimeZone(const UnicodeString &id)
351 : UObject(), fID(id)
352{
353}
354
355// -------------------------------------
356
357TimeZone::~TimeZone()
358{
359}
360
361// -------------------------------------
362
363TimeZone::TimeZone(const TimeZone &source)
364 : UObject(source), fID(source.fID)
365{
366}
367
368// -------------------------------------
369
370TimeZone &
371TimeZone::operator=(const TimeZone &right)
372{
373 if (this != &right) fID = right.fID;
374 return *this;
375}
376
377// -------------------------------------
378
379UBool
380TimeZone::operator==(const TimeZone& that) const
381{
382 return typeid(*this) == typeid(that) &&
383 fID == that.fID;
384}
385
386// -------------------------------------
387
388namespace {
389TimeZone*
390createSystemTimeZone(const UnicodeString& id, UErrorCode& ec) {
391 if (U_FAILURE(ec)) {
392 return NULL;
393 }
394 TimeZone* z = 0;
395 StackUResourceBundle res;
396 U_DEBUG_TZ_MSG(("pre-err=%s\n", u_errorName(ec)));
397 UResourceBundle *top = openOlsonResource(id, res.ref(), ec);
398 U_DEBUG_TZ_MSG(("post-err=%s\n", u_errorName(ec)));
399 if (U_SUCCESS(ec)) {
400 z = new OlsonTimeZone(top, res.getAlias(), id, ec);
401 if (z == NULL) {
402 ec = U_MEMORY_ALLOCATION_ERROR;
403 U_DEBUG_TZ_MSG(("cstz: olson time zone failed to initialize - err %s\n", u_errorName(ec)));
404 }
405 }
406 ures_close(top);
407 if (U_FAILURE(ec)) {
408 U_DEBUG_TZ_MSG(("cstz: failed to create, err %s\n", u_errorName(ec)));
409 delete z;
410 z = NULL;
411 }
412 return z;
413}
414
415/**
416 * Lookup the given name in our system zone table. If found,
417 * instantiate a new zone of that name and return it. If not
418 * found, return 0.
419 */
420TimeZone*
421createSystemTimeZone(const UnicodeString& id) {
422 UErrorCode ec = U_ZERO_ERROR;
423 return createSystemTimeZone(id, ec);
424}
425
426}
427
428TimeZone* U_EXPORT2
429TimeZone::createTimeZone(const UnicodeString& ID)
430{
431 /* We first try to lookup the zone ID in our system list. If this
432 * fails, we try to parse it as a custom string GMT[+-]hh:mm. If
433 * all else fails, we return GMT, which is probably not what the
434 * user wants, but at least is a functioning TimeZone object.
435 *
436 * We cannot return NULL, because that would break compatibility
437 * with the JDK.
438 */
439 TimeZone* result = createSystemTimeZone(ID);
440
441 if (result == NULL) {
442 U_DEBUG_TZ_MSG(("failed to load system time zone with id - falling to custom"));
443 result = createCustomTimeZone(ID);
444 }
445 if (result == NULL) {
446 U_DEBUG_TZ_MSG(("failed to load time zone with id - falling to Etc/Unknown(GMT)"));
447 const TimeZone& unknown = getUnknown();
448 // Unknown zone uses staticly allocated memory, so creation of it can never fail due to OOM.
449 result = unknown.clone();
450 }
451 return result;
452}
453
454// -------------------------------------
455
456TimeZone* U_EXPORT2
457TimeZone::detectHostTimeZone()
458{
459 // We access system timezone data through uprv_tzset(), uprv_tzname(), and others,
460 // which have platform specific implementations in putil.cpp
461 int32_t rawOffset = 0;
462 const char *hostID;
463 UBool hostDetectionSucceeded = TRUE;
464
465 // First, try to create a system timezone, based
466 // on the string ID in tzname[0].
467
468 uprv_tzset(); // Initialize tz... system data
469
470 uprv_tzname_clear_cache();
471
472 // Get the timezone ID from the host. This function should do
473 // any required host-specific remapping; e.g., on Windows this
474 // function maps the Windows Time Zone name to an ICU timezone ID.
475 hostID = uprv_tzname(0);
476
477 // Invert sign because UNIX semantics are backwards
478 rawOffset = uprv_timezone() * -U_MILLIS_PER_SECOND;
479
480 TimeZone* hostZone = NULL;
481
482 UnicodeString hostStrID(hostID, -1, US_INV);
483
484 if (hostStrID.length() == 0) {
485 // The host time zone detection (or remapping) above has failed and
486 // we have no name at all. Fallback to using the Unknown zone.
487 hostStrID = UnicodeString(TRUE, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH);
488 hostDetectionSucceeded = FALSE;
489 }
490
491 hostZone = createSystemTimeZone(hostStrID);
492
493#if U_PLATFORM_USES_ONLY_WIN32_API
494 // hostID points to a heap-allocated location on Windows.
495 uprv_free(const_cast<char *>(hostID));
496#endif
497
498 int32_t hostIDLen = hostStrID.length();
499 if (hostZone != NULL && rawOffset != hostZone->getRawOffset()
500 && (3 <= hostIDLen && hostIDLen <= 4))
501 {
502 // Uh oh. This probably wasn't a good id.
503 // It was probably an ambiguous abbreviation
504 delete hostZone;
505 hostZone = NULL;
506 }
507
508 // Construct a fixed standard zone with the host's ID
509 // and raw offset.
510 if (hostZone == NULL && hostDetectionSucceeded) {
511 hostZone = new SimpleTimeZone(rawOffset, hostStrID);
512 }
513
514 // If we _still_ don't have a time zone, use the Unknown zone.
515 //
516 // Note: This is extremely unlikely situation. If
517 // new SimpleTimeZone(...) above fails, the following
518 // code may also fail.
519 if (hostZone == NULL) {
520 // Unknown zone uses static allocated memory, so it must always exist.
521 // However, clone() allocates memory and can fail.
522 hostZone = TimeZone::getUnknown().clone();
523 }
524
525 return hostZone;
526}
527
528// -------------------------------------
529
530static UMutex gDefaultZoneMutex;
531
532/**
533 * Initialize DEFAULT_ZONE from the system default time zone.
534 * Upon return, DEFAULT_ZONE will not be NULL, unless operator new()
535 * returns NULL.
536 */
537static void U_CALLCONV initDefault()
538{
539 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
540
541 Mutex lock(&gDefaultZoneMutex);
542 // If setDefault() has already been called we can skip getting the
543 // default zone information from the system.
544 if (DEFAULT_ZONE != NULL) {
545 return;
546 }
547
548 // NOTE: this code is safely single threaded, being only
549 // run via umtx_initOnce().
550 //
551 // Some of the locale/timezone OS functions may not be thread safe,
552 //
553 // The operating system might actually use ICU to implement timezones.
554 // So we may have ICU calling ICU here, like on AIX.
555 // There shouldn't be a problem with this; initOnce does not hold a mutex
556 // while the init function is being run.
557
558 // The code detecting the host time zone was separated from this
559 // and implemented as TimeZone::detectHostTimeZone()
560
561 TimeZone *default_zone = TimeZone::detectHostTimeZone();
562
563 U_ASSERT(DEFAULT_ZONE == NULL);
564
565 DEFAULT_ZONE = default_zone;
566}
567
568// -------------------------------------
569
570TimeZone* U_EXPORT2
571TimeZone::createDefault()
572{
573 umtx_initOnce(gDefaultZoneInitOnce, initDefault);
574 {
575 Mutex lock(&gDefaultZoneMutex);
576 return (DEFAULT_ZONE != NULL) ? DEFAULT_ZONE->clone() : NULL;
577 }
578}
579
580// -------------------------------------
581
582void U_EXPORT2
583TimeZone::adoptDefault(TimeZone* zone)
584{
585 if (zone != NULL)
586 {
587 {
588 Mutex lock(&gDefaultZoneMutex);
589 TimeZone *old = DEFAULT_ZONE;
590 DEFAULT_ZONE = zone;
591 delete old;
592 }
593 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
594 }
595}
596// -------------------------------------
597
598void U_EXPORT2
599TimeZone::setDefault(const TimeZone& zone)
600{
601 adoptDefault(zone.clone());
602}
603
604//----------------------------------------------------------------------
605
606
607static void U_CALLCONV initMap(USystemTimeZoneType type, UErrorCode& ec) {
608 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
609
610 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
611 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
612 if (U_SUCCESS(ec)) {
613 int32_t size = ures_getSize(res);
614 int32_t *m = (int32_t *)uprv_malloc(size * sizeof(int32_t));
615 if (m == NULL) {
616 ec = U_MEMORY_ALLOCATION_ERROR;
617 } else {
618 int32_t numEntries = 0;
619 for (int32_t i = 0; i < size; i++) {
620 UnicodeString id = ures_getUnicodeStringByIndex(res, i, &ec);
621 if (U_FAILURE(ec)) {
622 break;
623 }
624 if (0 == id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH)) {
625 // exclude Etc/Unknown
626 continue;
627 }
628 if (type == UCAL_ZONE_TYPE_CANONICAL || type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
629 UnicodeString canonicalID;
630 ZoneMeta::getCanonicalCLDRID(id, canonicalID, ec);
631 if (U_FAILURE(ec)) {
632 break;
633 }
634 if (canonicalID != id) {
635 // exclude aliases
636 continue;
637 }
638 }
639 if (type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
640 const UChar *region = TimeZone::getRegion(id, ec);
641 if (U_FAILURE(ec)) {
642 break;
643 }
644 if (u_strcmp(region, WORLD) == 0) {
645 // exclude non-location ("001")
646 continue;
647 }
648 }
649 m[numEntries++] = i;
650 }
651 if (U_SUCCESS(ec)) {
652 int32_t *tmp = m;
653 m = (int32_t *)uprv_realloc(tmp, numEntries * sizeof(int32_t));
654 if (m == NULL) {
655 // realloc failed.. use the original one even it has unused
656 // area at the end
657 m = tmp;
658 }
659
660 switch(type) {
661 case UCAL_ZONE_TYPE_ANY:
662 U_ASSERT(MAP_SYSTEM_ZONES == NULL);
663 MAP_SYSTEM_ZONES = m;
664 LEN_SYSTEM_ZONES = numEntries;
665 break;
666 case UCAL_ZONE_TYPE_CANONICAL:
667 U_ASSERT(MAP_CANONICAL_SYSTEM_ZONES == NULL);
668 MAP_CANONICAL_SYSTEM_ZONES = m;
669 LEN_CANONICAL_SYSTEM_ZONES = numEntries;
670 break;
671 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
672 U_ASSERT(MAP_CANONICAL_SYSTEM_LOCATION_ZONES == NULL);
673 MAP_CANONICAL_SYSTEM_LOCATION_ZONES = m;
674 LEN_CANONICAL_SYSTEM_LOCATION_ZONES = numEntries;
675 break;
676 }
677 }
678 }
679 }
680 ures_close(res);
681}
682
683
684/**
685 * This is the default implementation for subclasses that do not
686 * override this method. This implementation calls through to the
687 * 8-argument getOffset() method after suitable computations, and
688 * correctly adjusts GMT millis to local millis when necessary.
689 */
690void TimeZone::getOffset(UDate date, UBool local, int32_t& rawOffset,
691 int32_t& dstOffset, UErrorCode& ec) const {
692 if (U_FAILURE(ec)) {
693 return;
694 }
695
696 rawOffset = getRawOffset();
697 if (!local) {
698 date += rawOffset; // now in local standard millis
699 }
700
701 // When local == TRUE, date might not be in local standard
702 // millis. getOffset taking 7 parameters used here assume
703 // the given time in day is local standard time.
704 // At STD->DST transition, there is a range of time which
705 // does not exist. When 'date' is in this time range
706 // (and local == TRUE), this method interprets the specified
707 // local time as DST. At DST->STD transition, there is a
708 // range of time which occurs twice. In this case, this
709 // method interprets the specified local time as STD.
710 // To support the behavior above, we need to call getOffset
711 // (with 7 args) twice when local == true and DST is
712 // detected in the initial call.
713 for (int32_t pass=0; ; ++pass) {
714 int32_t year, month, dom, dow;
715 double day = uprv_floor(date / U_MILLIS_PER_DAY);
716 int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
717
718 Grego::dayToFields(day, year, month, dom, dow);
719
720 dstOffset = getOffset(GregorianCalendar::AD, year, month, dom,
721 (uint8_t) dow, millis,
722 Grego::monthLength(year, month),
723 ec) - rawOffset;
724
725 // Recompute if local==TRUE, dstOffset!=0.
726 if (pass!=0 || !local || dstOffset == 0) {
727 break;
728 }
729 // adjust to local standard millis
730 date -= dstOffset;
731 }
732}
733
734// -------------------------------------
735
736// New available IDs API as of ICU 2.4. Uses StringEnumeration API.
737
738class TZEnumeration : public StringEnumeration {
739private:
740
741 // Map into to zones. Our results are zone[map[i]] for
742 // i=0..len-1, where zone[i] is the i-th Olson zone. If map==NULL
743 // then our results are zone[i] for i=0..len-1. Len will be zero
744 // if the zone data could not be loaded.
745 int32_t* map;
746 int32_t* localMap;
747 int32_t len;
748 int32_t pos;
749
750 TZEnumeration(int32_t* mapData, int32_t mapLen, UBool adoptMapData) : pos(0) {
751 map = mapData;
752 localMap = adoptMapData ? mapData : NULL;
753 len = mapLen;
754 }
755
756 UBool getID(int32_t i, UErrorCode& ec) {
757 int32_t idLen = 0;
758 const UChar* id = NULL;
759 UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
760 top = ures_getByKey(top, kNAMES, top, &ec); // dereference Zones section
761 id = ures_getStringByIndex(top, i, &idLen, &ec);
762 if(U_FAILURE(ec)) {
763 unistr.truncate(0);
764 }
765 else {
766 unistr.fastCopyFrom(UnicodeString(TRUE, id, idLen));
767 }
768 ures_close(top);
769 return U_SUCCESS(ec);
770 }
771
772 static int32_t* getMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) {
773 len = 0;
774 if (U_FAILURE(ec)) {
775 return NULL;
776 }
777 int32_t* m = NULL;
778 switch (type) {
779 case UCAL_ZONE_TYPE_ANY:
780 umtx_initOnce(gSystemZonesInitOnce, &initMap, type, ec);
781 m = MAP_SYSTEM_ZONES;
782 len = LEN_SYSTEM_ZONES;
783 break;
784 case UCAL_ZONE_TYPE_CANONICAL:
785 umtx_initOnce(gCanonicalZonesInitOnce, &initMap, type, ec);
786 m = MAP_CANONICAL_SYSTEM_ZONES;
787 len = LEN_CANONICAL_SYSTEM_ZONES;
788 break;
789 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
790 umtx_initOnce(gCanonicalLocationZonesInitOnce, &initMap, type, ec);
791 m = MAP_CANONICAL_SYSTEM_LOCATION_ZONES;
792 len = LEN_CANONICAL_SYSTEM_LOCATION_ZONES;
793 break;
794 default:
795 ec = U_ILLEGAL_ARGUMENT_ERROR;
796 m = NULL;
797 len = 0;
798 break;
799 }
800 return m;
801 }
802
803public:
804
805#define DEFAULT_FILTERED_MAP_SIZE 8
806#define MAP_INCREMENT_SIZE 8
807
808 static TZEnumeration* create(USystemTimeZoneType type, const char* region, const int32_t* rawOffset, UErrorCode& ec) {
809 if (U_FAILURE(ec)) {
810 return NULL;
811 }
812
813 int32_t baseLen;
814 int32_t *baseMap = getMap(type, baseLen, ec);
815
816 if (U_FAILURE(ec)) {
817 return NULL;
818 }
819
820 // If any additional conditions are available,
821 // create instance local map filtered by the conditions.
822
823 int32_t *filteredMap = NULL;
824 int32_t numEntries = 0;
825
826 if (region != NULL || rawOffset != NULL) {
827 int32_t filteredMapSize = DEFAULT_FILTERED_MAP_SIZE;
828 filteredMap = (int32_t *)uprv_malloc(filteredMapSize * sizeof(int32_t));
829 if (filteredMap == NULL) {
830 ec = U_MEMORY_ALLOCATION_ERROR;
831 return NULL;
832 }
833
834 // Walk through the base map
835 UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
836 res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
837 for (int32_t i = 0; i < baseLen; i++) {
838 int32_t zidx = baseMap[i];
839 UnicodeString id = ures_getUnicodeStringByIndex(res, zidx, &ec);
840 if (U_FAILURE(ec)) {
841 break;
842 }
843 if (region != NULL) {
844 // Filter by region
845 char tzregion[4]; // max 3 letters + null term
846 TimeZone::getRegion(id, tzregion, sizeof(tzregion), ec);
847 if (U_FAILURE(ec)) {
848 break;
849 }
850 if (uprv_stricmp(tzregion, region) != 0) {
851 // region does not match
852 continue;
853 }
854 }
855 if (rawOffset != NULL) {
856 // Filter by raw offset
857 // Note: This is VERY inefficient
858 TimeZone *z = createSystemTimeZone(id, ec);
859 if (U_FAILURE(ec)) {
860 break;
861 }
862 int32_t tzoffset = z->getRawOffset();
863 delete z;
864
865 if (tzoffset != *rawOffset) {
866 continue;
867 }
868 }
869
870 if (filteredMapSize <= numEntries) {
871 filteredMapSize += MAP_INCREMENT_SIZE;
872 int32_t *tmp = (int32_t *)uprv_realloc(filteredMap, filteredMapSize * sizeof(int32_t));
873 if (tmp == NULL) {
874 ec = U_MEMORY_ALLOCATION_ERROR;
875 break;
876 } else {
877 filteredMap = tmp;
878 }
879 }
880
881 filteredMap[numEntries++] = zidx;
882 }
883
884 if (U_FAILURE(ec)) {
885 uprv_free(filteredMap);
886 filteredMap = NULL;
887 }
888
889 ures_close(res);
890 }
891
892 TZEnumeration *result = NULL;
893 if (U_SUCCESS(ec)) {
894 // Finally, create a new enumeration instance
895 if (filteredMap == NULL) {
896 result = new TZEnumeration(baseMap, baseLen, FALSE);
897 } else {
898 result = new TZEnumeration(filteredMap, numEntries, TRUE);
899 filteredMap = NULL;
900 }
901 if (result == NULL) {
902 ec = U_MEMORY_ALLOCATION_ERROR;
903 }
904 }
905
906 if (filteredMap != NULL) {
907 uprv_free(filteredMap);
908 }
909
910 return result;
911 }
912
913 TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(NULL), localMap(NULL), len(0), pos(0) {
914 if (other.localMap != NULL) {
915 localMap = (int32_t *)uprv_malloc(other.len * sizeof(int32_t));
916 if (localMap != NULL) {
917 len = other.len;
918 uprv_memcpy(localMap, other.localMap, len * sizeof(int32_t));
919 pos = other.pos;
920 map = localMap;
921 } else {
922 len = 0;
923 pos = 0;
924 map = NULL;
925 }
926 } else {
927 map = other.map;
928 localMap = NULL;
929 len = other.len;
930 pos = other.pos;
931 }
932 }
933
934 virtual ~TZEnumeration();
935
936 virtual StringEnumeration *clone() const {
937 return new TZEnumeration(*this);
938 }
939
940 virtual int32_t count(UErrorCode& status) const {
941 return U_FAILURE(status) ? 0 : len;
942 }
943
944 virtual const UnicodeString* snext(UErrorCode& status) {
945 if (U_SUCCESS(status) && map != NULL && pos < len) {
946 getID(map[pos], status);
947 ++pos;
948 return &unistr;
949 }
950 return 0;
951 }
952
953 virtual void reset(UErrorCode& /*status*/) {
954 pos = 0;
955 }
956
957public:
958 static UClassID U_EXPORT2 getStaticClassID(void);
959 virtual UClassID getDynamicClassID(void) const;
960};
961
962TZEnumeration::~TZEnumeration() {
963 if (localMap != NULL) {
964 uprv_free(localMap);
965 }
966}
967
968UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)
969
970StringEnumeration* U_EXPORT2
971TimeZone::createTimeZoneIDEnumeration(
972 USystemTimeZoneType zoneType,
973 const char* region,
974 const int32_t* rawOffset,
975 UErrorCode& ec) {
976 return TZEnumeration::create(zoneType, region, rawOffset, ec);
977}
978
979StringEnumeration* U_EXPORT2
980TimeZone::createEnumeration() {
981 UErrorCode ec = U_ZERO_ERROR;
982 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, NULL, ec);
983}
984
985StringEnumeration* U_EXPORT2
986TimeZone::createEnumeration(int32_t rawOffset) {
987 UErrorCode ec = U_ZERO_ERROR;
988 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, &rawOffset, ec);
989}
990
991StringEnumeration* U_EXPORT2
992TimeZone::createEnumeration(const char* country) {
993 UErrorCode ec = U_ZERO_ERROR;
994 return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, country, NULL, ec);
995}
996
997// ---------------------------------------
998
999int32_t U_EXPORT2
1000TimeZone::countEquivalentIDs(const UnicodeString& id) {
1001 int32_t result = 0;
1002 UErrorCode ec = U_ZERO_ERROR;
1003 StackUResourceBundle res;
1004 U_DEBUG_TZ_MSG(("countEquivalentIDs..\n"));
1005 UResourceBundle *top = openOlsonResource(id, res.ref(), ec);
1006 if (U_SUCCESS(ec)) {
1007 StackUResourceBundle r;
1008 ures_getByKey(res.getAlias(), kLINKS, r.getAlias(), &ec);
1009 ures_getIntVector(r.getAlias(), &result, &ec);
1010 }
1011 ures_close(top);
1012 return result;
1013}
1014
1015// ---------------------------------------
1016
1017const UnicodeString U_EXPORT2
1018TimeZone::getEquivalentID(const UnicodeString& id, int32_t index) {
1019 U_DEBUG_TZ_MSG(("gEI(%d)\n", index));
1020 UnicodeString result;
1021 UErrorCode ec = U_ZERO_ERROR;
1022 StackUResourceBundle res;
1023 UResourceBundle *top = openOlsonResource(id, res.ref(), ec);
1024 int32_t zone = -1;
1025 if (U_SUCCESS(ec)) {
1026 StackUResourceBundle r;
1027 int32_t size;
1028 ures_getByKey(res.getAlias(), kLINKS, r.getAlias(), &ec);
1029 const int32_t *v = ures_getIntVector(r.getAlias(), &size, &ec);
1030 if (U_SUCCESS(ec)) {
1031 if (index >= 0 && index < size) {
1032 zone = v[index];
1033 }
1034 }
1035 }
1036 if (zone >= 0) {
1037 UResourceBundle *ares = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Zones section
1038 if (U_SUCCESS(ec)) {
1039 int32_t idLen = 0;
1040 const UChar* id2 = ures_getStringByIndex(ares, zone, &idLen, &ec);
1041 result.fastCopyFrom(UnicodeString(TRUE, id2, idLen));
1042 U_DEBUG_TZ_MSG(("gei(%d) -> %d, len%d, %s\n", index, zone, result.length(), u_errorName(ec)));
1043 }
1044 ures_close(ares);
1045 }
1046 ures_close(top);
1047#if defined(U_DEBUG_TZ)
1048 if(result.length() ==0) {
1049 U_DEBUG_TZ_MSG(("equiv [__, #%d] -> 0 (%s)\n", index, u_errorName(ec)));
1050 }
1051#endif
1052 return result;
1053}
1054
1055// ---------------------------------------
1056
1057// These methods are used by ZoneMeta class only.
1058
1059const UChar*
1060TimeZone::findID(const UnicodeString& id) {
1061 const UChar *result = NULL;
1062 UErrorCode ec = U_ZERO_ERROR;
1063 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1064
1065 // resolve zone index by name
1066 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1067 int32_t idx = findInStringArray(names, id, ec);
1068 result = ures_getStringByIndex(names, idx, NULL, &ec);
1069 if (U_FAILURE(ec)) {
1070 result = NULL;
1071 }
1072 ures_close(names);
1073 ures_close(rb);
1074 return result;
1075}
1076
1077
1078const UChar*
1079TimeZone::dereferOlsonLink(const UnicodeString& id) {
1080 const UChar *result = NULL;
1081 UErrorCode ec = U_ZERO_ERROR;
1082 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
1083
1084 // resolve zone index by name
1085 UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
1086 int32_t idx = findInStringArray(names, id, ec);
1087 result = ures_getStringByIndex(names, idx, NULL, &ec);
1088
1089 // open the zone bundle by index
1090 ures_getByKey(rb, kZONES, rb, &ec);
1091 ures_getByIndex(rb, idx, rb, &ec);
1092
1093 if (U_SUCCESS(ec)) {
1094 if (ures_getType(rb) == URES_INT) {
1095 // this is a link - dereference the link
1096 int32_t deref = ures_getInt(rb, &ec);
1097 const UChar* tmp = ures_getStringByIndex(names, deref, NULL, &ec);
1098 if (U_SUCCESS(ec)) {
1099 result = tmp;
1100 }
1101 }
1102 }
1103
1104 ures_close(names);
1105 ures_close(rb);
1106
1107 return result;
1108}
1109
1110const UChar*
1111TimeZone::getRegion(const UnicodeString& id) {
1112 UErrorCode status = U_ZERO_ERROR;
1113 return getRegion(id, status);
1114}
1115
1116const UChar*
1117TimeZone::getRegion(const UnicodeString& id, UErrorCode& status) {
1118 if (U_FAILURE(status)) {
1119 return NULL;
1120 }
1121 const UChar *result = NULL;
1122 UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &status);
1123
1124 // resolve zone index by name
1125 UResourceBundle *res = ures_getByKey(rb, kNAMES, NULL, &status);
1126 int32_t idx = findInStringArray(res, id, status);
1127
1128 // get region mapping
1129 ures_getByKey(rb, kREGIONS, res, &status);
1130 const UChar *tmp = ures_getStringByIndex(res, idx, NULL, &status);
1131 if (U_SUCCESS(status)) {
1132 result = tmp;
1133 }
1134
1135 ures_close(res);
1136 ures_close(rb);
1137
1138 return result;
1139}
1140
1141
1142// ---------------------------------------
1143int32_t
1144TimeZone::getRegion(const UnicodeString& id, char *region, int32_t capacity, UErrorCode& status)
1145{
1146 int32_t resultLen = 0;
1147 *region = 0;
1148 if (U_FAILURE(status)) {
1149 return 0;
1150 }
1151
1152 const UChar *uregion = NULL;
1153 // "Etc/Unknown" is not a system zone ID,
1154 // but in the zone data
1155 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) != 0) {
1156 uregion = getRegion(id);
1157 }
1158 if (uregion == NULL) {
1159 status = U_ILLEGAL_ARGUMENT_ERROR;
1160 return 0;
1161 }
1162 resultLen = u_strlen(uregion);
1163 // A region code is represented by invariant characters
1164 u_UCharsToChars(uregion, region, uprv_min(resultLen, capacity));
1165
1166 if (capacity < resultLen) {
1167 status = U_BUFFER_OVERFLOW_ERROR;
1168 return resultLen;
1169 }
1170
1171 return u_terminateChars(region, capacity, resultLen, &status);
1172}
1173
1174// ---------------------------------------
1175
1176
1177UnicodeString&
1178TimeZone::getDisplayName(UnicodeString& result) const
1179{
1180 return getDisplayName(FALSE,LONG,Locale::getDefault(), result);
1181}
1182
1183UnicodeString&
1184TimeZone::getDisplayName(const Locale& locale, UnicodeString& result) const
1185{
1186 return getDisplayName(FALSE, LONG, locale, result);
1187}
1188
1189UnicodeString&
1190TimeZone::getDisplayName(UBool inDaylight, EDisplayType style, UnicodeString& result) const
1191{
1192 return getDisplayName(inDaylight,style, Locale::getDefault(), result);
1193}
1194//--------------------------------------
1195int32_t
1196TimeZone::getDSTSavings()const {
1197 if (useDaylightTime()) {
1198 return 3600000;
1199 }
1200 return 0;
1201}
1202//---------------------------------------
1203UnicodeString&
1204TimeZone::getDisplayName(UBool inDaylight, EDisplayType style, const Locale& locale, UnicodeString& result) const
1205{
1206 UErrorCode status = U_ZERO_ERROR;
1207 UDate date = Calendar::getNow();
1208 UTimeZoneFormatTimeType timeType = UTZFMT_TIME_TYPE_UNKNOWN;
1209 int32_t offset;
1210
1211 if (style == GENERIC_LOCATION || style == LONG_GENERIC || style == SHORT_GENERIC) {
1212 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1213 if (U_FAILURE(status)) {
1214 result.remove();
1215 return result;
1216 }
1217 // Generic format
1218 switch (style) {
1219 case GENERIC_LOCATION:
1220 tzfmt->format(UTZFMT_STYLE_GENERIC_LOCATION, *this, date, result, &timeType);
1221 break;
1222 case LONG_GENERIC:
1223 tzfmt->format(UTZFMT_STYLE_GENERIC_LONG, *this, date, result, &timeType);
1224 break;
1225 case SHORT_GENERIC:
1226 tzfmt->format(UTZFMT_STYLE_GENERIC_SHORT, *this, date, result, &timeType);
1227 break;
1228 default:
1229 UPRV_UNREACHABLE;
1230 }
1231 // Generic format many use Localized GMT as the final fallback.
1232 // When Localized GMT format is used, the result might not be
1233 // appropriate for the requested daylight value.
1234 if ((inDaylight && timeType == UTZFMT_TIME_TYPE_STANDARD) || (!inDaylight && timeType == UTZFMT_TIME_TYPE_DAYLIGHT)) {
1235 offset = inDaylight ? getRawOffset() + getDSTSavings() : getRawOffset();
1236 if (style == SHORT_GENERIC) {
1237 tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1238 } else {
1239 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1240 }
1241 }
1242 } else if (style == LONG_GMT || style == SHORT_GMT) {
1243 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1244 if (U_FAILURE(status)) {
1245 result.remove();
1246 return result;
1247 }
1248 offset = inDaylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1249 switch (style) {
1250 case LONG_GMT:
1251 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1252 break;
1253 case SHORT_GMT:
1254 tzfmt->formatOffsetISO8601Basic(offset, FALSE, FALSE, FALSE, result, status);
1255 break;
1256 default:
1257 UPRV_UNREACHABLE;
1258 }
1259
1260 } else {
1261 U_ASSERT(style == LONG || style == SHORT || style == SHORT_COMMONLY_USED);
1262 UTimeZoneNameType nameType = UTZNM_UNKNOWN;
1263 switch (style) {
1264 case LONG:
1265 nameType = inDaylight ? UTZNM_LONG_DAYLIGHT : UTZNM_LONG_STANDARD;
1266 break;
1267 case SHORT:
1268 case SHORT_COMMONLY_USED:
1269 nameType = inDaylight ? UTZNM_SHORT_DAYLIGHT : UTZNM_SHORT_STANDARD;
1270 break;
1271 default:
1272 UPRV_UNREACHABLE;
1273 }
1274 LocalPointer<TimeZoneNames> tznames(TimeZoneNames::createInstance(locale, status));
1275 if (U_FAILURE(status)) {
1276 result.remove();
1277 return result;
1278 }
1279 UnicodeString canonicalID(ZoneMeta::getCanonicalCLDRID(*this));
1280 tznames->getDisplayName(canonicalID, nameType, date, result);
1281 if (result.isEmpty()) {
1282 // Fallback to localized GMT
1283 LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
1284 offset = inDaylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
1285 if (style == LONG) {
1286 tzfmt->formatOffsetLocalizedGMT(offset, result, status);
1287 } else {
1288 tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
1289 }
1290 }
1291 }
1292 if (U_FAILURE(status)) {
1293 result.remove();
1294 }
1295 return result;
1296}
1297
1298/**
1299 * Parse a custom time zone identifier and return a corresponding zone.
1300 * @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
1301 * GMT[+-]hh.
1302 * @return a newly created SimpleTimeZone with the given offset and
1303 * no Daylight Savings Time, or null if the id cannot be parsed.
1304*/
1305TimeZone*
1306TimeZone::createCustomTimeZone(const UnicodeString& id)
1307{
1308 int32_t sign, hour, min, sec;
1309 if (parseCustomID(id, sign, hour, min, sec)) {
1310 UnicodeString customID;
1311 formatCustomID(hour, min, sec, (sign < 0), customID);
1312 int32_t offset = sign * ((hour * 60 + min) * 60 + sec) * 1000;
1313 return new SimpleTimeZone(offset, customID);
1314 }
1315 return NULL;
1316}
1317
1318UnicodeString&
1319TimeZone::getCustomID(const UnicodeString& id, UnicodeString& normalized, UErrorCode& status) {
1320 normalized.remove();
1321 if (U_FAILURE(status)) {
1322 return normalized;
1323 }
1324 int32_t sign, hour, min, sec;
1325 if (parseCustomID(id, sign, hour, min, sec)) {
1326 formatCustomID(hour, min, sec, (sign < 0), normalized);
1327 } else {
1328 status = U_ILLEGAL_ARGUMENT_ERROR;
1329 }
1330 return normalized;
1331}
1332
1333UBool
1334TimeZone::parseCustomID(const UnicodeString& id, int32_t& sign,
1335 int32_t& hour, int32_t& min, int32_t& sec) {
1336 static const int32_t kParseFailed = -99999;
1337
1338 NumberFormat* numberFormat = 0;
1339 UnicodeString idUppercase = id;
1340 idUppercase.toUpper("");
1341
1342 if (id.length() > GMT_ID_LENGTH &&
1343 idUppercase.startsWith(GMT_ID, GMT_ID_LENGTH))
1344 {
1345 ParsePosition pos(GMT_ID_LENGTH);
1346 sign = 1;
1347 hour = 0;
1348 min = 0;
1349 sec = 0;
1350
1351 if (id[pos.getIndex()] == MINUS /*'-'*/) {
1352 sign = -1;
1353 } else if (id[pos.getIndex()] != PLUS /*'+'*/) {
1354 return FALSE;
1355 }
1356 pos.setIndex(pos.getIndex() + 1);
1357
1358 UErrorCode success = U_ZERO_ERROR;
1359 numberFormat = NumberFormat::createInstance(success);
1360 if(U_FAILURE(success)){
1361 return FALSE;
1362 }
1363 numberFormat->setParseIntegerOnly(TRUE);
1364 //numberFormat->setLenient(TRUE); // TODO: May need to set this, depends on latest timezone parsing
1365
1366 // Look for either hh:mm, hhmm, or hh
1367 int32_t start = pos.getIndex();
1368 Formattable n(kParseFailed);
1369 numberFormat->parse(id, n, pos);
1370 if (pos.getIndex() == start) {
1371 delete numberFormat;
1372 return FALSE;
1373 }
1374 hour = n.getLong();
1375
1376 if (pos.getIndex() < id.length()) {
1377 if (pos.getIndex() - start > 2
1378 || id[pos.getIndex()] != COLON) {
1379 delete numberFormat;
1380 return FALSE;
1381 }
1382 // hh:mm
1383 pos.setIndex(pos.getIndex() + 1);
1384 int32_t oldPos = pos.getIndex();
1385 n.setLong(kParseFailed);
1386 numberFormat->parse(id, n, pos);
1387 if ((pos.getIndex() - oldPos) != 2) {
1388 // must be 2 digits
1389 delete numberFormat;
1390 return FALSE;
1391 }
1392 min = n.getLong();
1393 if (pos.getIndex() < id.length()) {
1394 if (id[pos.getIndex()] != COLON) {
1395 delete numberFormat;
1396 return FALSE;
1397 }
1398 // [:ss]
1399 pos.setIndex(pos.getIndex() + 1);
1400 oldPos = pos.getIndex();
1401 n.setLong(kParseFailed);
1402 numberFormat->parse(id, n, pos);
1403 if (pos.getIndex() != id.length()
1404 || (pos.getIndex() - oldPos) != 2) {
1405 delete numberFormat;
1406 return FALSE;
1407 }
1408 sec = n.getLong();
1409 }
1410 } else {
1411 // Supported formats are below -
1412 //
1413 // HHmmss
1414 // Hmmss
1415 // HHmm
1416 // Hmm
1417 // HH
1418 // H
1419
1420 int32_t length = pos.getIndex() - start;
1421 if (length <= 0 || 6 < length) {
1422 // invalid length
1423 delete numberFormat;
1424 return FALSE;
1425 }
1426 switch (length) {
1427 case 1:
1428 case 2:
1429 // already set to hour
1430 break;
1431 case 3:
1432 case 4:
1433 min = hour % 100;
1434 hour /= 100;
1435 break;
1436 case 5:
1437 case 6:
1438 sec = hour % 100;
1439 min = (hour/100) % 100;
1440 hour /= 10000;
1441 break;
1442 }
1443 }
1444
1445 delete numberFormat;
1446
1447 if (hour > kMAX_CUSTOM_HOUR || min > kMAX_CUSTOM_MIN || sec > kMAX_CUSTOM_SEC) {
1448 return FALSE;
1449 }
1450 return TRUE;
1451 }
1452 return FALSE;
1453}
1454
1455UnicodeString&
1456TimeZone::formatCustomID(int32_t hour, int32_t min, int32_t sec,
1457 UBool negative, UnicodeString& id) {
1458 // Create time zone ID - GMT[+|-]hhmm[ss]
1459 id.setTo(GMT_ID, GMT_ID_LENGTH);
1460 if (hour | min | sec) {
1461 if (negative) {
1462 id += (UChar)MINUS;
1463 } else {
1464 id += (UChar)PLUS;
1465 }
1466
1467 if (hour < 10) {
1468 id += (UChar)ZERO_DIGIT;
1469 } else {
1470 id += (UChar)(ZERO_DIGIT + hour/10);
1471 }
1472 id += (UChar)(ZERO_DIGIT + hour%10);
1473 id += (UChar)COLON;
1474 if (min < 10) {
1475 id += (UChar)ZERO_DIGIT;
1476 } else {
1477 id += (UChar)(ZERO_DIGIT + min/10);
1478 }
1479 id += (UChar)(ZERO_DIGIT + min%10);
1480
1481 if (sec) {
1482 id += (UChar)COLON;
1483 if (sec < 10) {
1484 id += (UChar)ZERO_DIGIT;
1485 } else {
1486 id += (UChar)(ZERO_DIGIT + sec/10);
1487 }
1488 id += (UChar)(ZERO_DIGIT + sec%10);
1489 }
1490 }
1491 return id;
1492}
1493
1494
1495UBool
1496TimeZone::hasSameRules(const TimeZone& other) const
1497{
1498 return (getRawOffset() == other.getRawOffset() &&
1499 useDaylightTime() == other.useDaylightTime());
1500}
1501
1502static void U_CALLCONV initTZDataVersion(UErrorCode &status) {
1503 ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
1504 int32_t len = 0;
1505 StackUResourceBundle bundle;
1506 ures_openDirectFillIn(bundle.getAlias(), NULL, kZONEINFO, &status);
1507 const UChar *tzver = ures_getStringByKey(bundle.getAlias(), kTZVERSION, &len, &status);
1508
1509 if (U_SUCCESS(status)) {
1510 if (len >= (int32_t)sizeof(TZDATA_VERSION)) {
1511 // Ensure that there is always space for a trailing nul in TZDATA_VERSION
1512 len = sizeof(TZDATA_VERSION) - 1;
1513 }
1514 u_UCharsToChars(tzver, TZDATA_VERSION, len);
1515 }
1516}
1517
1518const char*
1519TimeZone::getTZDataVersion(UErrorCode& status)
1520{
1521 umtx_initOnce(gTZDataVersionInitOnce, &initTZDataVersion, status);
1522 return (const char*)TZDATA_VERSION;
1523}
1524
1525UnicodeString&
1526TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UErrorCode& status)
1527{
1528 UBool isSystemID = FALSE;
1529 return getCanonicalID(id, canonicalID, isSystemID, status);
1530}
1531
1532UnicodeString&
1533TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UBool& isSystemID,
1534 UErrorCode& status)
1535{
1536 canonicalID.remove();
1537 isSystemID = FALSE;
1538 if (U_FAILURE(status)) {
1539 return canonicalID;
1540 }
1541 if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) == 0) {
1542 // special case - Etc/Unknown is a canonical ID, but not system ID
1543 canonicalID.fastCopyFrom(id);
1544 isSystemID = FALSE;
1545 } else {
1546 ZoneMeta::getCanonicalCLDRID(id, canonicalID, status);
1547 if (U_SUCCESS(status)) {
1548 isSystemID = TRUE;
1549 } else {
1550 // Not a system ID
1551 status = U_ZERO_ERROR;
1552 getCustomID(id, canonicalID, status);
1553 }
1554 }
1555 return canonicalID;
1556}
1557
1558UnicodeString&
1559TimeZone::getWindowsID(const UnicodeString& id, UnicodeString& winid, UErrorCode& status) {
1560 winid.remove();
1561 if (U_FAILURE(status)) {
1562 return winid;
1563 }
1564
1565 // canonicalize the input ID
1566 UnicodeString canonicalID;
1567 UBool isSystemID = FALSE;
1568
1569 getCanonicalID(id, canonicalID, isSystemID, status);
1570 if (U_FAILURE(status) || !isSystemID) {
1571 // mapping data is only applicable to tz database IDs
1572 if (status == U_ILLEGAL_ARGUMENT_ERROR) {
1573 // getWindowsID() sets an empty string where
1574 // getCanonicalID() sets a U_ILLEGAL_ARGUMENT_ERROR.
1575 status = U_ZERO_ERROR;
1576 }
1577 return winid;
1578 }
1579
1580 UResourceBundle *mapTimezones = ures_openDirect(NULL, "windowsZones", &status);
1581 ures_getByKey(mapTimezones, "mapTimezones", mapTimezones, &status);
1582
1583 if (U_FAILURE(status)) {
1584 return winid;
1585 }
1586
1587 UResourceBundle *winzone = NULL;
1588 UBool found = FALSE;
1589 while (ures_hasNext(mapTimezones) && !found) {
1590 winzone = ures_getNextResource(mapTimezones, winzone, &status);
1591 if (U_FAILURE(status)) {
1592 break;
1593 }
1594 if (ures_getType(winzone) != URES_TABLE) {
1595 continue;
1596 }
1597 UResourceBundle *regionalData = NULL;
1598 while (ures_hasNext(winzone) && !found) {
1599 regionalData = ures_getNextResource(winzone, regionalData, &status);
1600 if (U_FAILURE(status)) {
1601 break;
1602 }
1603 if (ures_getType(regionalData) != URES_STRING) {
1604 continue;
1605 }
1606 int32_t len;
1607 const UChar *tzids = ures_getString(regionalData, &len, &status);
1608 if (U_FAILURE(status)) {
1609 break;
1610 }
1611
1612 const UChar *start = tzids;
1613 UBool hasNext = TRUE;
1614 while (hasNext) {
1615 const UChar *end = u_strchr(start, (UChar)0x20);
1616 if (end == NULL) {
1617 end = tzids + len;
1618 hasNext = FALSE;
1619 }
1620 if (canonicalID.compare(start, static_cast<int32_t>(end - start)) == 0) {
1621 winid = UnicodeString(ures_getKey(winzone), -1 , US_INV);
1622 found = TRUE;
1623 break;
1624 }
1625 start = end + 1;
1626 }
1627 }
1628 ures_close(regionalData);
1629 }
1630 ures_close(winzone);
1631 ures_close(mapTimezones);
1632
1633 return winid;
1634}
1635
1636#define MAX_WINDOWS_ID_SIZE 128
1637
1638UnicodeString&
1639TimeZone::getIDForWindowsID(const UnicodeString& winid, const char* region, UnicodeString& id, UErrorCode& status) {
1640 id.remove();
1641 if (U_FAILURE(status)) {
1642 return id;
1643 }
1644
1645 UResourceBundle *zones = ures_openDirect(NULL, "windowsZones", &status);
1646 ures_getByKey(zones, "mapTimezones", zones, &status);
1647 if (U_FAILURE(status)) {
1648 ures_close(zones);
1649 return id;
1650 }
1651
1652 UErrorCode tmperr = U_ZERO_ERROR;
1653 char winidKey[MAX_WINDOWS_ID_SIZE];
1654 int32_t winKeyLen = winid.extract(0, winid.length(), winidKey, sizeof(winidKey) - 1, US_INV);
1655
1656 if (winKeyLen == 0 || winKeyLen >= (int32_t)sizeof(winidKey)) {
1657 ures_close(zones);
1658 return id;
1659 }
1660 winidKey[winKeyLen] = 0;
1661
1662 ures_getByKey(zones, winidKey, zones, &tmperr); // use tmperr, because windows mapping might not
1663 // be avaiable by design
1664 if (U_FAILURE(tmperr)) {
1665 ures_close(zones);
1666 return id;
1667 }
1668
1669 const UChar *tzid = NULL;
1670 int32_t len = 0;
1671 UBool gotID = FALSE;
1672 if (region) {
1673 const UChar *tzids = ures_getStringByKey(zones, region, &len, &tmperr); // use tmperr, because
1674 // regional mapping is optional
1675 if (U_SUCCESS(tmperr)) {
1676 // first ID delimited by space is the defasult one
1677 const UChar *end = u_strchr(tzids, (UChar)0x20);
1678 if (end == NULL) {
1679 id.setTo(tzids, -1);
1680 } else {
1681 id.setTo(tzids, static_cast<int32_t>(end - tzids));
1682 }
1683 gotID = TRUE;
1684 }
1685 }
1686
1687 if (!gotID) {
1688 tzid = ures_getStringByKey(zones, "001", &len, &status); // using status, because "001" must be
1689 // available at this point
1690 if (U_SUCCESS(status)) {
1691 id.setTo(tzid, len);
1692 }
1693 }
1694
1695 ures_close(zones);
1696 return id;
1697}
1698
1699
1700U_NAMESPACE_END
1701
1702#endif /* #if !UCONFIG_NO_FORMATTING */
1703
1704//eof
1705