| /* |
| ******************************************************************************* |
| * Copyright (C) 1997-2001, 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" |
| |
| #if !UCONFIG_NO_FORMATTING |
| |
| #include "unicode/simpletz.h" |
| #include "unicode/smpdtfmt.h" |
| #include "unicode/calendar.h" |
| #include "mutex.h" |
| #include "unicode/udata.h" |
| #include "tzdat.h" |
| #include "ucln_in.h" |
| #include "cstring.h" |
| #include "cmemory.h" |
| #include "unicode/strenum.h" |
| #include "uassert.h" |
| |
| /** |
| * udata callback to verify the zone data. |
| */ |
| U_CDECL_BEGIN |
| static UBool U_CALLCONV |
| isTimeZoneDataAcceptable(void * /*context*/, |
| const char * /*type*/, const char * /*name*/, |
| const UDataInfo *pInfo) { |
| return |
| pInfo->size >= sizeof(UDataInfo) && |
| pInfo->isBigEndian == U_IS_BIG_ENDIAN && |
| pInfo->charsetFamily == U_CHARSET_FAMILY && |
| pInfo->dataFormat[0] == TZ_SIG_0 && |
| pInfo->dataFormat[1] == TZ_SIG_1 && |
| pInfo->dataFormat[2] == TZ_SIG_2 && |
| pInfo->dataFormat[3] == TZ_SIG_3 && |
| pInfo->formatVersion[0] == TZ_FORMAT_VERSION; |
| } |
| U_CDECL_END |
| |
| // 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" */ |
| }; |
| |
| // See header file for documentation of the following |
| static const TZHeader * DATA = NULL; // alias into UDATA_MEMORY |
| static const uint32_t* INDEX_BY_ID = 0; // alias into UDATA_MEMORY |
| static const OffsetIndex* INDEX_BY_OFFSET = 0; // alias into UDATA_MEMORY |
| static const CountryIndex* INDEX_BY_COUNTRY = 0; // alias into UDATA_MEMORY |
| |
| static UDataMemory* UDATA_MEMORY = 0; |
| static UMTX LOCK; |
| static TimeZone* DEFAULT_ZONE = NULL; |
| static TimeZone* _GMT = NULL; // cf. TimeZone::GMT |
| static UnicodeString* ZONE_IDS = 0; |
| const char TimeZone::fgClassID = 0; // Value is irrelevant |
| |
| UBool timeZone_cleanup() |
| { |
| // Aliases into UDATA_MEMORY; do NOT delete |
| DATA = NULL; |
| INDEX_BY_ID = NULL; |
| INDEX_BY_OFFSET = NULL; |
| INDEX_BY_COUNTRY = NULL; |
| |
| delete []ZONE_IDS; |
| ZONE_IDS = NULL; |
| |
| delete DEFAULT_ZONE; |
| DEFAULT_ZONE = NULL; |
| |
| delete _GMT; |
| _GMT = NULL; |
| |
| if (UDATA_MEMORY) { |
| udata_close(UDATA_MEMORY); |
| UDATA_MEMORY = NULL; |
| } |
| |
| if (LOCK) { |
| umtx_destroy(&LOCK); |
| LOCK = NULL; |
| } |
| |
| return TRUE; |
| } |
| |
| U_NAMESPACE_BEGIN |
| |
| /** |
| * Load the system time zone data from icudata.dll (or its |
| * equivalent). If this call succeeds, it will return TRUE and |
| * UDATA_MEMORY will be non-null, and DATA and INDEX_BY_* will be set |
| * to point into it. If this call fails, either because the data |
| * could not be opened, or because the ID array could not be |
| * allocated, then it will return FALSE. |
| * |
| * Must be called OUTSIDE mutex. |
| */ |
| static UBool loadZoneData() { |
| |
| // Open a data memory object, to be closed either later in this |
| // function or in timeZone_cleanup(). Purify (etc.) may |
| // mistakenly report this as a leak. |
| UErrorCode status = U_ZERO_ERROR; |
| UDataMemory* udata = udata_openChoice(0, TZ_DATA_TYPE, TZ_DATA_NAME, |
| (UDataMemoryIsAcceptable*)isTimeZoneDataAcceptable, 0, &status); |
| if (U_FAILURE(status)) { |
| U_ASSERT(udata==0); |
| return FALSE; |
| } |
| |
| U_ASSERT(udata!=0); |
| TZHeader* tzh = (TZHeader*)udata_getMemory(udata); |
| U_ASSERT(tzh!=0); |
| |
| const uint32_t* index_by_id = |
| (const uint32_t*)((int8_t*)tzh + tzh->nameIndexDelta); |
| const OffsetIndex* index_by_offset = |
| (const OffsetIndex*)((int8_t*)tzh + tzh->offsetIndexDelta); |
| const CountryIndex* index_by_country = |
| (const CountryIndex*)((int8_t*)tzh + tzh->countryIndexDelta); |
| |
| // Construct the available IDs array. The ordering |
| // of this array conforms to the ordering of the |
| // index by name table. |
| UnicodeString* zone_ids = new UnicodeString[tzh->count]; |
| if (zone_ids == 0) { |
| udata_close(udata); |
| return FALSE; |
| } |
| // Find start of name table, and walk through it |
| // linearly. If you're wondering why we don't use |
| // the INDEX_BY_ID, it's because that indexes the |
| // zone objects, not the name table. The name |
| // table is unindexed. |
| const char* name = (const char*)tzh + tzh->nameTableDelta; |
| int32_t length; |
| for (uint32_t i=0; i<tzh->count; ++i) { |
| zone_ids[i] = UnicodeString(name, ""); // invariant converter |
| length = zone_ids[i].length(); // add a NUL but don't count it so that |
| zone_ids[i].append((UChar)0); // getBuffer() gets a terminated string |
| zone_ids[i].truncate(length); |
| name += uprv_strlen(name) + 1; |
| } |
| |
| // Keep mutexed operations as short as possible by doing all |
| // computations first, then doing pointer copies within the mutex. |
| umtx_lock(&LOCK); |
| if (UDATA_MEMORY == 0) { |
| UDATA_MEMORY = udata; |
| DATA = tzh; |
| INDEX_BY_ID = index_by_id; |
| INDEX_BY_OFFSET = index_by_offset; |
| INDEX_BY_COUNTRY = index_by_country; |
| ZONE_IDS = zone_ids; |
| |
| udata = NULL; |
| zone_ids = NULL; |
| } |
| umtx_unlock(&LOCK); |
| |
| // If another thread initialized the statics first, then delete |
| // our unused data. |
| if (udata != NULL) { |
| udata_close(udata); |
| delete[] zone_ids; |
| } |
| |
| // Cleanup handles both _GMT and the UDataMemory-based statics |
| ucln_i18n_registerCleanup(); |
| |
| return TRUE; |
| } |
| |
| /** |
| * Inline function that returns TRUE if we have zone data, loading it |
| * if necessary. The only time this function will return false is if |
| * loadZoneData() fails, and UDATA_MEMORY and associated pointers are |
| * NULL (rare). |
| * |
| * The difference between this function and loadZoneData() is that |
| * this is an inline function that expands to code which avoids making |
| * a function call in the case where the data is already loaded (the |
| * common case). |
| * |
| * Must be called OUTSIDE mutex. |
| */ |
| static inline UBool haveZoneData() { |
| umtx_lock(&LOCK); |
| UBool f = (UDATA_MEMORY != 0); |
| umtx_unlock(&LOCK); |
| return f || loadZoneData(); |
| } |
| |
| // ------------------------------------- |
| |
| const TimeZone* |
| TimeZone::getGMT(void) |
| { |
| Mutex lock(&LOCK); |
| // Initialize _GMT independently of other static data; it should |
| // be valid even if we can't load the time zone UDataMemory. |
| if (_GMT == 0) { |
| _GMT = new SimpleTimeZone(0, UnicodeString(GMT_ID, GMT_ID_LENGTH)); |
| } |
| return _GMT; |
| } |
| |
| // ***************************************************************************** |
| // class TimeZone |
| // ***************************************************************************** |
| |
| TimeZone::TimeZone() |
| : UObject(), fID() |
| { |
| } |
| |
| // ------------------------------------- |
| |
| TimeZone::TimeZone(const UnicodeString &id) |
| : UObject(), fID(id) |
| { |
| } |
| |
| // ------------------------------------- |
| |
| TimeZone::~TimeZone() |
| { |
| } |
| |
| // ------------------------------------- |
| |
| TimeZone::TimeZone(const TimeZone &source) |
| : UObject(source), fID(source.fID) |
| { |
| } |
| |
| // ------------------------------------- |
| |
| TimeZone & |
| TimeZone::operator=(const TimeZone &right) |
| { |
| if (this != &right) fID = right.fID; |
| return *this; |
| } |
| |
| // ------------------------------------- |
| |
| UBool |
| TimeZone::operator==(const TimeZone& that) const |
| { |
| return getDynamicClassID() == that.getDynamicClassID() && |
| fID == that.fID; |
| } |
| |
| // ------------------------------------- |
| |
| TimeZone* |
| TimeZone::createTimeZone(const UnicodeString& ID) |
| { |
| /* We first try to lookup the zone ID in our system list. If this |
| * fails, we try to parse it as a custom string GMT[+-]hh:mm. If |
| * all else fails, we return GMT, which is probably not what the |
| * user wants, but at least is a functioning TimeZone object. |
| */ |
| TimeZone* result = 0; |
| |
| if (haveZoneData()) { |
| result = createSystemTimeZone(ID); |
| } |
| if (result == 0) { |
| result = createCustomTimeZone(ID); |
| } |
| if (result == 0) { |
| result = getGMT()->clone(); |
| } |
| return result; |
| } |
| |
| /** |
| * Lookup the given ID in the system time zone equivalency group table. |
| * Return a pointer to the equivalency group, or NULL if not found. |
| * DATA MUST BE INITIALIZED AND NON-NULL. |
| */ |
| static const TZEquivalencyGroup* |
| lookupEquivalencyGroup(const UnicodeString& id) { |
| // Perform a binary search. Possible optimization: Unroll the |
| // search. Not worth it given the small number of zones (416 in |
| // 1999j). |
| uint32_t low = 0; |
| uint32_t high = DATA->count; |
| while (high > low) { |
| // Invariant: match, if present, must be in the range [low, |
| // high). |
| uint32_t i = (low + high) / 2; |
| int8_t c = id.compare(ZONE_IDS[i]); |
| if (c == 0) { |
| return (TZEquivalencyGroup*) ((int8_t*)DATA + INDEX_BY_ID[i]); |
| } else if (c < 0) { |
| high = i; |
| } else { |
| low = i + 1; |
| } |
| } |
| return 0; |
| } |
| |
| /** |
| * 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. |
| * |
| * The caller must ensure that haveZoneData() returns TRUE before |
| * calling. |
| */ |
| TimeZone* |
| TimeZone::createSystemTimeZone(const UnicodeString& name) { |
| U_ASSERT(UDATA_MEMORY != 0); |
| const TZEquivalencyGroup *eg = lookupEquivalencyGroup(name); |
| if (eg != NULL) { |
| return eg->isDST ? |
| new SimpleTimeZone(eg->u.d.zone, name) : |
| new SimpleTimeZone(eg->u.s.zone, name); |
| } |
| return NULL; |
| } |
| |
| // ------------------------------------- |
| |
| /** |
| * 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; |
| |
| if (haveZoneData()) { |
| default_zone = createSystemTimeZone(hostID); |
| |
| // 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); |
| } |
| } |
| } |
| |
| // If we _still_ don't have a time zone, use GMT. This |
| // can only happen if the raw offset returned by |
| // uprv_timezone() does not correspond to any system zone. |
| 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; |
| } |
| umtx_unlock(&LOCK); |
| |
| delete default_zone; |
| } |
| |
| // ------------------------------------- |
| |
| TimeZone* |
| TimeZone::createDefault() |
| { |
| 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_lock(&LOCK); |
| old = DEFAULT_ZONE; |
| DEFAULT_ZONE = zone; |
| umtx_unlock(&LOCK); |
| |
| delete old; |
| } |
| } |
| // ------------------------------------- |
| |
| void |
| TimeZone::setDefault(const TimeZone& zone) |
| { |
| adoptDefault(zone.clone()); |
| } |
| |
| // ------------------------------------- |
| |
| // New available IDs API as of ICU 2.4. Uses StringEnumeration API. |
| |
| class TZEnumeration : public StringEnumeration { |
| // Map into to ZONE_IDS. Our results are ZONE_IDS[map[i]] for |
| // i=0..len-1. If map==NULL then our results are ZONE_IDS[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; |
| void* _bufp; |
| int32_t _buflen; |
| |
| public: |
| TZEnumeration() { |
| map = NULL; |
| _bufp = NULL; |
| len = pos = _buflen = 0; |
| if (haveZoneData()) { |
| len = DATA->count; |
| } |
| } |
| |
| TZEnumeration(int32_t rawOffset) { |
| map = NULL; |
| _bufp = NULL; |
| len = pos = _buflen = 0; |
| |
| if (!haveZoneData()) { |
| return; |
| } |
| |
| /* The offset index table is a table of variable-sized objects. |
| * Each entry has an offset to the next entry; the last entry has |
| * a next entry offset of zero. |
| * |
| * The entries are sorted in ascending numerical order of GMT |
| * offset. Each entry lists all the system zones at that offset, |
| * in lexicographic order of ID. Note that this ordering is |
| * somewhat significant in that the _first_ zone in each list is |
| * what will be chosen as the default under certain fallback |
| * conditions. We currently just let that be the |
| * lexicographically first zone, but we could also adjust the list |
| * to pick which zone was first for this situation -- probably not |
| * worth the trouble. |
| * |
| * The list of zones is actually just 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 ZONE_IDS. |
| */ |
| 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 |
| map = (int32_t*)uprv_malloc(sizeof(int32_t) * index->count); |
| if (map != NULL) { |
| len = index->count; |
| const uint16_t* zoneNumberArray = &(index->zoneNumber); |
| for (uint16_t i=0; i<len; ++i) { |
| map[i] = zoneNumberArray[i]; |
| } |
| } |
| } |
| // 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); |
| } |
| } |
| |
| TZEnumeration(const char* country) { |
| map = NULL; |
| _bufp = NULL; |
| len = pos = _buflen = 0; |
| |
| if (!haveZoneData()) { |
| return; |
| } |
| |
| /* The country index table is a table of variable-sized objects. |
| * Each entry has an offset to the next entry; the last entry has |
| * a next entry offset of zero. |
| * |
| * The entries are sorted in ascending numerical order of intcode. |
| * This is an integer representation of the 2-letter ISO 3166 |
| * country code. It is computed as (c1-'A')*32 + (c0-'A'), where |
| * the country code is c1 c0, with 'A' <= ci <= 'Z'. |
| * |
| * 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 ZONE_IDS. |
| */ |
| const CountryIndex* index = INDEX_BY_COUNTRY; |
| |
| uint16_t intcode = 0; |
| if (country != NULL && *country != 0) { |
| intcode = (uint16_t)((U_UPPER_ORDINAL(country[0]) << 5) |
| + U_UPPER_ORDINAL(country[1])); |
| } |
| |
| for (;;) { |
| if (index->intcode > intcode) { |
| // Went past our desired country; no match found |
| break; |
| } |
| if (index->intcode == intcode) { |
| // Found our desired country |
| map = (int32_t*)uprv_malloc(sizeof(int32_t) * index->count); |
| if (map != NULL) { |
| len = index->count; |
| const uint16_t* zoneNumberArray = &(index->zoneNumber); |
| for (uint16_t i=0; i<len; ++i) { |
| map[i] = zoneNumberArray[i]; |
| } |
| } |
| } |
| // 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 CountryIndex*)((int8_t*)index + delta); |
| } |
| } |
| |
| virtual ~TZEnumeration() { |
| uprv_free(map); |
| uprv_free(_bufp); |
| } |
| |
| int32_t count(UErrorCode& status) const { |
| return U_FAILURE(status) ? 0 : len; |
| } |
| |
| const char* next(int32_t* resultLength, UErrorCode& status) { |
| // TODO: Later a subclass of StringEnumeration will be available |
| // that implements next() and unext() in terms of snext(). |
| // Inherit from that class when available and remove this method |
| // (and its declaration). |
| const UnicodeString* us = snext(status); |
| int32_t newlen; |
| if (us != NULL && ensureCapacity((newlen=us->length()) + 1)) { |
| us->extract(0, INT32_MAX, (char*) _bufp, ""); |
| if (resultLength) { |
| resultLength[0] = newlen; |
| } |
| return (const char*)_bufp; |
| } |
| return NULL; |
| } |
| |
| const UChar* unext(int32_t* resultLength, UErrorCode& status) { |
| const UnicodeString* us = snext(status); |
| if (us != NULL) { |
| if (resultLength) { |
| resultLength[0] = us->length(); |
| } |
| // TimeZone terminates the ID strings when it builds them |
| return us->getBuffer(); |
| } |
| return NULL; |
| } |
| |
| const UnicodeString* snext(UErrorCode& status) { |
| if (U_SUCCESS(status) && pos < len) { |
| return (map != NULL) ? |
| &ZONE_IDS[map[pos++]] : &ZONE_IDS[pos++]; |
| } |
| return NULL; |
| } |
| |
| void reset(UErrorCode& status) { |
| pos = 0; |
| } |
| |
| public: |
| virtual UClassID getDynamicClassID(void) const { return getStaticClassID(); } |
| static UClassID getStaticClassID(void) { return (UClassID)&fgClassID; } |
| private: |
| static const char fgClassID; |
| |
| private: |
| /** |
| * Guarantee that _bufp is allocated to include _buflen characters |
| * where _buflen >= minlen. Return TRUE if successful, FALSE |
| * otherwise. |
| */ |
| UBool ensureCapacity(int32_t minlen) { |
| if (_bufp != NULL && _buflen >= minlen) { |
| return TRUE; |
| } |
| _buflen = minlen + 8; // add 8 to prevent thrashing |
| _bufp = (_bufp == NULL) ? uprv_malloc(_buflen) |
| : uprv_realloc(_bufp, _buflen); |
| return _bufp != NULL; |
| } |
| }; |
| |
| 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); |
| } |
| |
| // ------------------------------------- |
| |
| // TODO: #ifdef out this code after 8-Nov-2003 |
| // #ifdef ICU_TIMEZONE_USE_DEPRECATES |
| |
| 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. |
| |
| if (!haveZoneData()) { |
| numIDs = 0; |
| return 0; |
| } |
| |
| /* The offset index table is a table of variable-sized objects. |
| * Each entry has an offset to the next entry; the last entry has |
| * a next entry offset of zero. |
| * |
| * The entries are sorted in ascending numerical order of GMT |
| * offset. Each entry lists all the system zones at that offset, |
| * in lexicographic order of ID. Note that this ordering is |
| * somewhat significant in that the _first_ zone in each list is |
| * what will be chosen as the default under certain fallback |
| * conditions. We currently just let that be the |
| * lexicographically first zone, but we could also adjust the list |
| * to pick which zone was first for this situation -- probably not |
| * worth the trouble. |
| * |
| * The list of zones is actually just 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 ZONE_IDS. |
| */ |
| 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 |
| const UnicodeString** result = |
| (const UnicodeString**)uprv_malloc(index->count * sizeof(UnicodeString *)); |
| const uint16_t* zoneNumberArray = &(index->zoneNumber); |
| for (uint16_t i=0; i<index->count; ++i) { |
| // Pointer assignment - use existing UnicodeString object! |
| // Don't create a new UnicodeString on the heap here! |
| result[i] = &ZONE_IDS[zoneNumberArray[i]]; |
| } |
| numIDs = index->count; |
| return result; |
| } |
| // 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); |
| } |
| |
| numIDs = 0; |
| return 0; |
| } |
| |
| // ------------------------------------- |
| |
| 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. |
| |
| if (!haveZoneData()) { |
| numIDs = 0; |
| return 0; |
| } |
| |
| /* The country index table is a table of variable-sized objects. |
| * Each entry has an offset to the next entry; the last entry has |
| * a next entry offset of zero. |
| * |
| * The entries are sorted in ascending numerical order of intcode. |
| * This is an integer representation of the 2-letter ISO 3166 |
| * country code. It is computed as (c1-'A')*32 + (c0-'A'), where |
| * the country code is c1 c0, with 'A' <= ci <= 'Z'. |
| * |
| * 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 ZONE_IDS. |
| */ |
| const CountryIndex* index = INDEX_BY_COUNTRY; |
| |
| uint16_t intcode = 0; |
| if (country != NULL && *country != 0) { |
| intcode = (uint16_t)((U_UPPER_ORDINAL(country[0]) << 5) |
| + U_UPPER_ORDINAL(country[1])); |
| } |
| |
| for (;;) { |
| if (index->intcode > intcode) { |
| // Went past our desired country; no match found |
| break; |
| } |
| if (index->intcode == intcode) { |
| // Found our desired country |
| const UnicodeString** result = |
| (const UnicodeString**)uprv_malloc(index->count * sizeof(UnicodeString *)); |
| const uint16_t* zoneNumberArray = &(index->zoneNumber); |
| for (uint16_t i=0; i<index->count; ++i) { |
| // Pointer assignment - use existing UnicodeString object! |
| // Don't create a new UnicodeString on the heap here! |
| result[i] = &ZONE_IDS[zoneNumberArray[i]]; |
| } |
| numIDs = index->count; |
| return result; |
| } |
| // 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 CountryIndex*)((int8_t*)index + delta); |
| } |
| |
| numIDs = 0; |
| return 0; |
| } |
| |
| // ------------------------------------- |
| |
| const UnicodeString** |
| TimeZone::createAvailableIDs(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. |
| // |
| // This is really unnecessary, given the fact that we have an |
| // array of the IDs already constructed, and we could just return |
| // that. However, that would be a breaking API change, and some |
| // callers familiar with the original API might try to delete it. |
| |
| if (!haveZoneData()) { |
| numIDs = 0; |
| return 0; |
| } |
| |
| const UnicodeString** result = |
| (const UnicodeString** )uprv_malloc(DATA->count * sizeof(UnicodeString *)); |
| |
| // Create a list of pointers to each and every zone ID |
| for (uint32_t i=0; i<DATA->count; ++i) { |
| // Pointer assignment - use existing UnicodeString object! |
| // Don't create a new UnicodeString on the heap here! |
| result[i] = &ZONE_IDS[i]; |
| } |
| |
| numIDs = DATA->count; |
| return result; |
| } |
| |
| // ICU_TIMEZONE_USE_DEPRECATES |
| // #endif |
| // see above |
| |
| // --------------------------------------- |
| |
| int32_t |
| TimeZone::countEquivalentIDs(const UnicodeString& id) { |
| if (!haveZoneData()) { |
| return 0; |
| } |
| const TZEquivalencyGroup *eg = lookupEquivalencyGroup(id); |
| return (eg != 0) ? (eg->isDST ? eg->u.d.count : eg->u.s.count) : 0; |
| } |
| |
| // --------------------------------------- |
| |
| const UnicodeString |
| TimeZone::getEquivalentID(const UnicodeString& id, int32_t index) { |
| if (haveZoneData()) { |
| const TZEquivalencyGroup *eg = lookupEquivalencyGroup(id); |
| if (eg != 0) { |
| const uint16_t *p = eg->isDST ? &eg->u.d.count : &eg->u.s.count; |
| if (index >= 0 && index < *p) { |
| return ZONE_IDS[p[index+1]]; |
| } |
| } |
| } |
| return UnicodeString(); |
| } |
| |
| // --------------------------------------- |
| |
| |
| 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; |
| |
| SimpleDateFormat format(style == LONG ? "zzzz" : "z",locale,status); |
| |
| if(!U_SUCCESS(status)) |
| { |
| // *** SRL what do I do here?!! |
| 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 |
