/* ******************************************************************************* * Copyright (C) 1997-2003, International Business Machines Corporation and * * others. All Rights Reserved. * ******************************************************************************* * * File TIMEZONE.CPP * * Modification History: * * Date Name Description * 12/05/96 clhuang Creation. * 04/21/97 aliu General clean-up and bug fixing. * 05/08/97 aliu Fixed Hashtable code per code review. * 07/09/97 helena Changed createInstance to createDefault. * 07/29/97 aliu Updated with all-new list of 96 UNIX-derived * TimeZones. Changed mechanism to load from static * array rather than resource bundle. * 07/07/1998 srl Bugfixes from the Java side: UTC GMT CAT NST * Added getDisplayName API * going to add custom parsing. * * ISSUES: * - should getDisplayName cache something? * - should custom time zones be cached? [probably] * 08/10/98 stephen Brought getDisplayName() API in-line w/ conventions * 08/19/98 stephen Changed createTimeZone() to never return 0 * 09/02/98 stephen Added getOffset(monthLen) and hasSameRules() * 09/15/98 stephen Added getStaticClassID() * 02/22/99 stephen Removed character literals for EBCDIC safety * 05/04/99 stephen Changed initDefault() for Mutex issues * 07/12/99 helena HPUX 11 CC Port. * 12/03/99 aliu Moved data out of static table into icudata.dll. * Substantial rewrite of zone lookup, default zone, and * available IDs code. Misc. cleanup. *********************************************************************************/ #include "unicode/utypes.h" #include "unicode/ustring.h" #ifdef U_DEBUG_TZ # include # include "uresimp.h" // for debugging static void debug_tz_loc(const char *f, int32_t l) { fprintf(stderr, "%s:%d: ", f, l); } static void debug_tz_msg(const char *pat, ...) { va_list ap; va_start(ap, pat); vfprintf(stderr, pat, ap); fflush(stderr); } static char gStrBuf[256]; #define U_DEBUG_TZ_STR(x) u_austrncpy(gStrBuf,x,sizeof(gStrBuf)-1) // must use double parens, i.e.: U_DEBUG_TZ_MSG(("four is: %d",4)); #define U_DEBUG_TZ_MSG(x) {debug_tz_loc(__FILE__,__LINE__);debug_tz_msg x;} #else #define U_DEBUG_TZ_MSG(x) #endif #if !UCONFIG_NO_FORMATTING #include "unicode/simpletz.h" #include "unicode/smpdtfmt.h" #include "unicode/calendar.h" #include "unicode/gregocal.h" #include "unicode/ures.h" #include "gregoimp.h" #include "uresimp.h" // struct UResourceBundle #include "olsontz.h" #include "mutex.h" #include "unicode/udata.h" #include "ucln_in.h" #include "cstring.h" #include "cmemory.h" #include "unicode/strenum.h" #include "uassert.h" #define kZONEINFO "zoneinfo" #define kREGIONS "Regions" #define kZONES "Zones" #define kRULES "Rules" #define kNAMES "Names" #define kDEFAULT "Default" // Static data and constants static const UChar GMT_ID[] = {0x47, 0x4D, 0x54, 0x00}; /* "GMT" */ static const int32_t GMT_ID_LENGTH = 3; static const UChar CUSTOM_ID[] = { 0x43, 0x75, 0x73, 0x74, 0x6F, 0x6D, 0x00 /* "Custom" */ }; static UMTX LOCK; static TimeZone* DEFAULT_ZONE = NULL; static TimeZone* _GMT = NULL; // cf. TimeZone::GMT #ifdef U_USE_TIMEZONE_OBSOLETE_2_8 static UnicodeString* OLSON_IDS = 0; #endif UBool timeZone_cleanup() { #ifdef U_USE_TIMEZONE_OBSOLETE_2_8 delete []OLSON_IDS; OLSON_IDS = 0; #endif delete DEFAULT_ZONE; DEFAULT_ZONE = NULL; delete _GMT; _GMT = NULL; if (LOCK) { umtx_destroy(&LOCK); LOCK = NULL; } return TRUE; } U_NAMESPACE_BEGIN /** * The Olson data is stored the "zoneinfo" resource bundle. * Sub-resources are organized into three ranges of data: Zones, final * rules, and country tables. There is also a meta-data resource * which has 3 integers: The number of zones, rules, and countries, * respectively. The country count includes the non-country 'Default'. */ static int32_t OLSON_ZONE_START = -1; // starting index of zones static int32_t OLSON_ZONE_COUNT = 0; // count of zones /** * Given a pointer to an open "zoneinfo" resource, load up the Olson * meta-data. Return TRUE if successful. */ static UBool getOlsonMeta(const UResourceBundle* top) { if (OLSON_ZONE_START < 0) { UErrorCode ec = U_ZERO_ERROR; UResourceBundle res; ures_initStackObject(&res); ures_getByKey(top, kZONES, &res, &ec); if(U_SUCCESS(ec)) { OLSON_ZONE_COUNT = ures_getSize(&res); OLSON_ZONE_START = 0; U_DEBUG_TZ_MSG(("OZC%d OZS%d\n",OLSON_ZONE_COUNT, OLSON_ZONE_START)); } ures_close(&res); } return (OLSON_ZONE_START >= 0); } /** * Load up the Olson meta-data. Return TRUE if successful. */ static UBool getOlsonMeta() { if (OLSON_ZONE_START < 0) { UErrorCode ec = U_ZERO_ERROR; UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec); if (U_SUCCESS(ec)) { getOlsonMeta(top); } ures_close(top); } return (OLSON_ZONE_START >= 0); } static int32_t findInStringArray(UResourceBundle* array, const UnicodeString& id, UErrorCode &status) { UnicodeString copy = id; const UChar* buf = copy.getTerminatedBuffer(); const UChar* u = NULL; int32_t count = ures_getSize(array); int32_t start = 0; int32_t i; int32_t len; int32_t limit = count; if(U_FAILURE(status) || (count < 1)) { return -1; } U_DEBUG_TZ_MSG(("fisa: Looking for %s, between %d and %d\n", U_DEBUG_TZ_STR(buf), start, limit)); while(U_SUCCESS(status) && (start kRULES [%s]\n", key, u_errorName(status))); r = ures_getByKey(r, key, r, &status); U_DEBUG_TZ_MSG(("loadRule(%s) -> item [%s]\n", key, u_errorName(status))); return r; } /** * Given an ID, open the appropriate resource for the given time zone. * Dereference aliases if necessary. * @param id zone id * @param res resource, which must be ready for use (initialized but not open) * @param ec input-output error code * @return top-level resource bundle */ static UResourceBundle* openOlsonResource(const UnicodeString& id, UResourceBundle& res, UErrorCode& ec) { #if U_DEBUG_TZ char buf[128]; id.extract(0, sizeof(buf)-1, buf, sizeof(buf), ""); #endif UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec); U_DEBUG_TZ_MSG(("pre: res sz=%d\n", ures_getSize(&res))); /* &res = */ getZoneByName(top, id, &res, ec); // Dereference if this is an alias. Docs say result should be 1 // but it is 0 in 2.8 (?). U_DEBUG_TZ_MSG(("Loading zone '%s' (%s, size %d) - %s\n", buf, ures_getKey((UResourceBundle*)&res), ures_getSize(&res), u_errorName(ec))); if (ures_getSize(&res) <= 1 && getOlsonMeta(top)) { int32_t deref = ures_getInt(&res, &ec) + 0; U_DEBUG_TZ_MSG(("getInt: %s - type is %d\n", u_errorName(ec), ures_getType(&res))); UResourceBundle *ares = ures_getByKey(top, kZONES, NULL, &ec); // dereference Zones section ures_getByIndex(ares, deref, &res, &ec); ures_close(ares); U_DEBUG_TZ_MSG(("alias to #%d (%s) - %s\n", deref, "??", u_errorName(ec))); } else { U_DEBUG_TZ_MSG(("not an alias - size %d\n", ures_getSize(&res))); } U_DEBUG_TZ_MSG(("%s - final status is %s\n", buf, u_errorName(ec))); return top; } #ifdef U_USE_TIMEZONE_OBSOLETE_2_8 /** * Load all the ids from the "zoneinfo" resource bundle into a static * array that we hang onto. This is _only_ used to implement the * deprecated createAvailableIDs() API. */ static UBool loadOlsonIDs() { if (OLSON_IDS != 0) { return TRUE; } UErrorCode ec = U_ZERO_ERROR; UnicodeString* ids = 0; int32_t count = 0; UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec); UResourceBundle *nres = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Names section if (U_SUCCESS(ec)) { getOlsonMeta(top); int32_t start = 0; count = ures_getSize(nres); ids = new UnicodeString[(count > 0) ? count : 1]; for (int32_t i=0; iclone(); } return result; } /** * Lookup the given name in our system zone table. If found, * instantiate a new zone of that name and return it. If not * found, return 0. */ TimeZone* TimeZone::createSystemTimeZone(const UnicodeString& id) { TimeZone* z = 0; UErrorCode ec = U_ZERO_ERROR; UResourceBundle res; ures_initStackObject(&res); U_DEBUG_TZ_MSG(("pre-err=%s\n", u_errorName(ec))); UResourceBundle *top = openOlsonResource(id, res, ec); U_DEBUG_TZ_MSG(("post-err=%s\n", u_errorName(ec))); if (U_SUCCESS(ec)) { z = new OlsonTimeZone(top, &res, ec); if (z) { z->setID(id); } else { U_DEBUG_TZ_MSG(("cstz: olson time zone failed to initialize - err %s\n", u_errorName(ec))); } } ures_close(&res); ures_close(top); if (U_FAILURE(ec)) { U_DEBUG_TZ_MSG(("cstz: failed to create, err %s\n", u_errorName(ec))); delete z; z = 0; } return z; } // ------------------------------------- /** * Initialize DEFAULT_ZONE from the system default time zone. The * caller should confirm that DEFAULT_ZONE is NULL before calling. * Upon return, DEFAULT_ZONE will not be NULL, unless operator new() * returns NULL. * * Must be called OUTSIDE mutex. */ void TimeZone::initDefault() { // We access system timezone data through TPlatformUtilities, // including tzset(), timezone, and tzname[]. int32_t rawOffset = 0; const char *hostID; // First, try to create a system timezone, based // on the string ID in tzname[0]. { // NOTE: Global mutex here; TimeZone mutex above // mutexed to avoid threading issues in the platform fcns. // Some of the locale/timezone OS functions may not be thread safe, // so the intent is that any setting from anywhere within ICU // happens with the ICU global mutex held. Mutex lock; uprv_tzset(); // Initialize tz... system data // Get the timezone ID from the host. This function should do // any required host-specific remapping; e.g., on Windows this // function maps the Date and Time control panel setting to an // ICU timezone ID. hostID = uprv_tzname(0); // Invert sign because UNIX semantics are backwards rawOffset = uprv_timezone() * -U_MILLIS_PER_SECOND; } TimeZone* default_zone = NULL; default_zone = createSystemTimeZone(hostID); #if 0 // NOTE: As of ICU 2.8, we no longer have an offsets table, since // historical zones can change offset over time. If we add // build-time heuristics to infer the "most frequent" raw offset // of a zone, we can build tables and institute defaults, as done // in ICU <= 2.6. // If we couldn't get the time zone ID from the host, use // the default host timezone offset. Further refinements // to this include querying the host to determine if DST // is in use or not and possibly using the host locale to // select from multiple zones at a the same offset. We // don't do any of this now, but we could easily add this. if (default_zone == NULL) { // Use the designated default in the time zone list that has the // appropriate GMT offset, if there is one. const OffsetIndex* index = INDEX_BY_OFFSET; for (;;) { if (index->gmtOffset > rawOffset) { // Went past our desired offset; no match found break; } if (index->gmtOffset == rawOffset) { // Found our desired offset default_zone = createSystemTimeZone(ZONE_IDS[index->defaultZone]); break; } // Compute the position of the next entry. If the delta value // in this entry is zero, then there is no next entry. uint16_t delta = index->nextEntryDelta; if (delta == 0) { break; } index = (const OffsetIndex*)((int8_t*)index + delta); } } #endif // Construct a fixed standard zone with the host's ID // and raw offset. if (default_zone == NULL) { default_zone = new SimpleTimeZone(rawOffset, UnicodeString(hostID, (char*)0)); } // If we _still_ don't have a time zone, use GMT. if (default_zone == NULL) { default_zone = getGMT()->clone(); } // If DEFAULT_ZONE is still NULL, set it up. umtx_lock(&LOCK); if (DEFAULT_ZONE == NULL) { DEFAULT_ZONE = default_zone; default_zone = NULL; ucln_i18n_registerCleanup(); } umtx_unlock(&LOCK); delete default_zone; } // ------------------------------------- TimeZone* TimeZone::createDefault() { umtx_init(&LOCK); /* This is here to prevent race conditions. */ umtx_lock(&LOCK); UBool f = (DEFAULT_ZONE != 0); umtx_unlock(&LOCK); if (!f) { initDefault(); } Mutex lock(&LOCK); // In case adoptDefault is called return DEFAULT_ZONE->clone(); } // ------------------------------------- void TimeZone::adoptDefault(TimeZone* zone) { if (zone != NULL) { TimeZone* old = NULL; umtx_init(&LOCK); /* This is here to prevent race conditions. */ umtx_lock(&LOCK); old = DEFAULT_ZONE; DEFAULT_ZONE = zone; umtx_unlock(&LOCK); delete old; ucln_i18n_registerCleanup(); } } // ------------------------------------- void TimeZone::setDefault(const TimeZone& zone) { adoptDefault(zone.clone()); } //---------------------------------------------------------------------- /** * This is the default implementation for subclasses that do not * override this method. This implementation calls through to the * 8-argument getOffset() method after suitable computations, and * correctly adjusts GMT millis to local millis when necessary. */ void TimeZone::getOffset(UDate date, UBool local, int32_t& rawOffset, int32_t& dstOffset, UErrorCode& ec) const { if (U_FAILURE(ec)) { return; } rawOffset = getRawOffset(); // Convert to local wall millis if necessary if (!local) { date += rawOffset; // now in local standard millis } // When local==FALSE, we might have to recompute. This loop is // executed once, unless a recomputation is required; then it is // executed twice. for (int32_t pass=0; ; ++pass) { int32_t year, month, dom, dow; double day = uprv_floor(date / U_MILLIS_PER_DAY); int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY); Grego::dayToFields(day, year, month, dom, dow); dstOffset = getOffset(GregorianCalendar::AD, year, month, dom, (uint8_t) dow, millis, Grego::monthLength(year, month), ec) - rawOffset; // Recompute if local==FALSE, dstOffset!=0, and addition of // the dstOffset puts us in a different day. if (pass!=0 || local || dstOffset==0) { break; } date += dstOffset; if (uprv_floor(date / U_MILLIS_PER_DAY) == day) { break; } } } // ------------------------------------- // New available IDs API as of ICU 2.4. Uses StringEnumeration API. class TZEnumeration : public StringEnumeration { // Map into to zones. Our results are zone[map[i]] for // i=0..len-1, where zone[i] is the i-th Olson zone. If map==NULL // then our results are zone[i] for i=0..len-1. Len will be zero // iff the zone data could not be loaded. int32_t* map; int32_t len; int32_t pos; public: TZEnumeration() : map(NULL), len(0), pos(0) { if (getOlsonMeta()) { len = OLSON_ZONE_COUNT; } } TZEnumeration(int32_t rawOffset) : map(NULL), len(0), pos(0) { if (!getOlsonMeta()) { return; } // Allocate more space than we'll need. The end of the array will // be blank. map = (int32_t*)uprv_malloc(OLSON_ZONE_COUNT * sizeof(int32_t)); if (map == 0) { return; } uprv_memset(map, 0, sizeof(int32_t) * OLSON_ZONE_COUNT); UnicodeString s; for (int32_t i=0; igetID(s) == unistr && z->getRawOffset() == rawOffset) { map[len++] = i; } delete z; } } } TZEnumeration(const char* country) : map(NULL), len(0), pos(0) { if (!getOlsonMeta()) { return; } char key[] = {0, 0, 0, 0,0, 0, 0,0, 0, 0,0}; // e.g., "US", or "Default" for no country if (country) { uprv_strncat(key, country, 2); } else { uprv_strcpy(key, kDEFAULT); } UErrorCode ec = U_ZERO_ERROR; UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec); top = ures_getByKey(top, kREGIONS, top, &ec); // dereference 'Regions' section if (U_SUCCESS(ec)) { UResourceBundle res; ures_initStackObject(&res); ures_getByKey(top, key, &res, &ec); // The list of zones is a list of integers, from 0..n-1, // where n is the total number of system zones. const int32_t* v = ures_getIntVector(&res, &len, &ec); if (U_SUCCESS(ec)) { U_ASSERT(len > 0); map = (int32_t*)uprv_malloc(sizeof(int32_t) * len); if (map != 0) { for (uint16_t i=0; i= 0 && v[i] < OLSON_ZONE_COUNT); map[i] = v[i]; } } } else { U_DEBUG_TZ_MSG(("Failed to load tz for region %s: %s\n", country, u_errorName(ec))); } ures_close(&res); } ures_close(top); } TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(NULL), len(0), pos(0) { if(other.len > 0) { if(other.map != NULL) { map = (int32_t *)uprv_malloc(other.len * sizeof(int32_t)); if(map != NULL) { len = other.len; uprv_memcpy(map, other.map, len * sizeof(int32_t)); pos = other.pos; } } else { len = other.len; pos = other.pos; } } } virtual ~TZEnumeration() { uprv_free(map); } virtual StringEnumeration *clone() const { return new TZEnumeration(*this); } int32_t count(UErrorCode& status) const { return U_FAILURE(status) ? 0 : len; } const UnicodeString* snext(UErrorCode& status) { if (U_SUCCESS(status) && pos < len) { getID((map == 0) ? pos : map[pos]); ++pos; return &unistr; } return 0; } void reset(UErrorCode& /*status*/) { pos = 0; } private: UBool getID(int32_t i) { UErrorCode ec = U_ZERO_ERROR; int32_t idLen = 0; const UChar* id = NULL; UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec); top = ures_getByKey(top, kNAMES, top, &ec); // dereference Zones section id = ures_getStringByIndex(top, i, &idLen, &ec); if(U_FAILURE(ec)) { unistr.truncate(0); } else { unistr.fastCopyFrom(UnicodeString(TRUE, id, idLen)); } ures_close(top); return U_SUCCESS(ec); } static const char fgClassID; public: static inline UClassID getStaticClassID(void) { return (UClassID)&fgClassID; } virtual UClassID getDynamicClassID(void) const { return getStaticClassID(); } }; const char TZEnumeration::fgClassID = '\0'; StringEnumeration* TimeZone::createEnumeration() { return new TZEnumeration(); } StringEnumeration* TimeZone::createEnumeration(int32_t rawOffset) { return new TZEnumeration(rawOffset); } StringEnumeration* TimeZone::createEnumeration(const char* country) { return new TZEnumeration(country); } // ------------------------------------- #ifdef U_USE_TIMEZONE_OBSOLETE_2_8 const UnicodeString** TimeZone::createAvailableIDs(int32_t rawOffset, int32_t& numIDs) { // We are creating a new array to existing UnicodeString pointers. // The caller will delete the array when done, but not the pointers // in the array. numIDs = 0; if (!loadOlsonIDs()) { return 0; } // Allocate more space than we'll need. The end of the array will // be blank. const UnicodeString** ids = (const UnicodeString** )uprv_malloc(OLSON_ZONE_COUNT * sizeof(UnicodeString *)); if (ids == 0) { return 0; } uprv_memset(ids, 0, sizeof(UnicodeString*) * OLSON_ZONE_COUNT); UnicodeString s; for (int32_t i=0; igetID(s) == OLSON_IDS[i] && z->getRawOffset() == rawOffset) { ids[numIDs++] = &OLSON_IDS[i]; // [sic] } delete z; } return ids; } // ------------------------------------- const UnicodeString** TimeZone::createAvailableIDs(const char* country, int32_t& numIDs) { // We are creating a new array to existing UnicodeString pointers. // The caller will delete the array when done, but not the pointers // in the array. numIDs = 0; if (!loadOlsonIDs()) { return 0; } char key[] = { 0, 0, 0,0, 0, 0,0, 0, 0 }; // e.g., "US", or "Default" for non-country zones if (country) { uprv_strncat(key, country, 2); } else { uprv_strcpy(key, kDEFAULT); } const UnicodeString** ids = 0; UErrorCode ec = U_ZERO_ERROR; UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec); UResourceBundle *ares = ures_getByKey(top, kREGIONS, NULL, &ec); // dereference Regions section if (U_SUCCESS(ec)) { getOlsonMeta(top); UResourceBundle res; ures_initStackObject(&res); ures_getByKey(ares, key, &res, &ec); U_DEBUG_TZ_MSG(("caI: on %s, err %s\n", country, u_errorName(ec))); if (U_SUCCESS(ec)) { /* The list of zones is a list of integers, from 0..n-1, * where n is the total number of system zones. The * numbering corresponds exactly to the ordering of * OLSON_IDS. */ const int32_t* v = ures_getIntVector(&res, &numIDs, &ec); ids = (const UnicodeString**) uprv_malloc(numIDs * sizeof(UnicodeString*)); if (ids == 0) { numIDs = 0; } else { for (int32_t i=0; i= 0 && index < size && getOlsonMeta()) { zone = v[index]; } ures_close(&r); } } ures_close(&res); if (zone >= 0) { UResourceBundle *ares = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Zones section if (U_SUCCESS(ec)) { int32_t idLen = 0; const UChar* id = ures_getStringByIndex(ares, zone, &idLen, &ec); result.fastCopyFrom(UnicodeString(TRUE, id, idLen)); U_DEBUG_TZ_MSG(("gei(%d) -> %d, len%d, %s\n", index, zone, result.length(), u_errorName(ec))); } ures_close(ares); } ures_close(top); #if defined(U_DEBUG_TZ) if(result.length() ==0) { U_DEBUG_TZ_MSG(("equiv [__, #%d] -> 0 (%s)\n", index, u_errorName(ec))); } #endif return result; } // --------------------------------------- UnicodeString& TimeZone::getDisplayName(UnicodeString& result) const { return getDisplayName(FALSE,LONG,Locale::getDefault(), result); } UnicodeString& TimeZone::getDisplayName(const Locale& locale, UnicodeString& result) const { return getDisplayName(FALSE, LONG, locale, result); } UnicodeString& TimeZone::getDisplayName(UBool daylight, EDisplayType style, UnicodeString& result) const { return getDisplayName(daylight,style, Locale::getDefault(), result); } UnicodeString& TimeZone::getDisplayName(UBool daylight, EDisplayType style, const Locale& locale, UnicodeString& result) const { // SRL TODO: cache the SDF, just like java. UErrorCode status = U_ZERO_ERROR; #ifdef U_DEBUG_TZ char buf[128]; fID.extract(0, sizeof(buf)-1, buf, sizeof(buf), ""); #endif SimpleDateFormat format(style == LONG ? "zzzz" : "z",locale,status); U_DEBUG_TZ_MSG(("getDisplayName(%s)\n", buf)); if(!U_SUCCESS(status)) { #ifdef U_DEBUG_TZ char buf2[128]; result.extract(0, sizeof(buf2)-1, buf2, sizeof(buf2), ""); U_DEBUG_TZ_MSG(("getDisplayName(%s) -> %s\n", buf, buf2)); #endif return result.remove(); } // Create a new SimpleTimeZone as a stand-in for this zone; the // stand-in will have no DST, or all DST, but the same ID and offset, // and hence the same display name. // We don't cache these because they're small and cheap to create. UnicodeString tempID; SimpleTimeZone *tz = daylight ? // For the pure-DST zone, we use JANUARY and DECEMBER new SimpleTimeZone(getRawOffset(), getID(tempID), UCAL_JANUARY , 1, 0, 0, UCAL_DECEMBER , 31, 0, U_MILLIS_PER_DAY, status) : new SimpleTimeZone(getRawOffset(), getID(tempID)); format.applyPattern(style == LONG ? "zzzz" : "z"); Calendar *myCalendar = (Calendar*)format.getCalendar(); myCalendar->setTimeZone(*tz); // copy delete tz; FieldPosition pos(FieldPosition::DONT_CARE); return format.format(UDate(196262345678.), result, pos); // Must use a valid date here. } /** * Parse a custom time zone identifier and return a corresponding zone. * @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or * GMT[+-]hh. * @return a newly created SimpleTimeZone with the given offset and * no Daylight Savings Time, or null if the id cannot be parsed. */ TimeZone* TimeZone::createCustomTimeZone(const UnicodeString& id) { static const int32_t kParseFailed = -99999; NumberFormat* numberFormat = 0; UnicodeString idUppercase = id; idUppercase.toUpper(); if (id.length() > GMT_ID_LENGTH && idUppercase.startsWith(GMT_ID)) { ParsePosition pos(GMT_ID_LENGTH); UBool negative = FALSE; int32_t offset; if (id[pos.getIndex()] == 0x002D /*'-'*/) negative = TRUE; else if (id[pos.getIndex()] != 0x002B /*'+'*/) return 0; pos.setIndex(pos.getIndex() + 1); UErrorCode success = U_ZERO_ERROR; numberFormat = NumberFormat::createInstance(success); numberFormat->setParseIntegerOnly(TRUE); // Look for either hh:mm, hhmm, or hh int32_t start = pos.getIndex(); Formattable n(kParseFailed); numberFormat->parse(id, n, pos); if (pos.getIndex() == start) { delete numberFormat; return 0; } offset = n.getLong(); if (pos.getIndex() < id.length() && id[pos.getIndex()] == 0x003A /*':'*/) { // hh:mm offset *= 60; pos.setIndex(pos.getIndex() + 1); int32_t oldPos = pos.getIndex(); n.setLong(kParseFailed); numberFormat->parse(id, n, pos); if (pos.getIndex() == oldPos) { delete numberFormat; return 0; } offset += n.getLong(); } else { // hhmm or hh // Be strict about interpreting something as hh; it must be // an offset < 30, and it must be one or two digits. Thus // 0010 is interpreted as 00:10, but 10 is interpreted as // 10:00. if (offset < 30 && (pos.getIndex() - start) <= 2) offset *= 60; // hh, from 00 to 29; 30 is 00:30 else offset = offset % 100 + offset / 100 * 60; // hhmm } if(negative) offset = -offset; delete numberFormat; return new SimpleTimeZone(offset * 60000, CUSTOM_ID); } return 0; } UBool TimeZone::hasSameRules(const TimeZone& other) const { return (getRawOffset() == other.getRawOffset() && useDaylightTime() == other.useDaylightTime()); } U_NAMESPACE_END #endif /* #if !UCONFIG_NO_FORMATTING */ //eof