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Diffstat (limited to 'intl/icu/source/i18n/timezone.cpp')
| -rw-r--r-- | intl/icu/source/i18n/timezone.cpp | 1740 |
1 files changed, 1740 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/timezone.cpp b/intl/icu/source/i18n/timezone.cpp new file mode 100644 index 0000000000..75479267d7 --- /dev/null +++ b/intl/icu/source/i18n/timezone.cpp @@ -0,0 +1,1740 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +******************************************************************************* +* Copyright (C) 1997-2016, 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 "utypeinfo.h" // for 'typeid' to work + +#include "unicode/utypes.h" +#include "unicode/ustring.h" +#include "uassert.h" +#include "ustr_imp.h" + +#ifdef U_DEBUG_TZ +# include <stdio.h> +# 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/calendar.h" +#include "unicode/gregocal.h" +#include "unicode/ures.h" +#include "unicode/tzfmt.h" +#include "unicode/numfmt.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" +#include "zonemeta.h" + +#define kZONEINFO "zoneinfo64" +#define kREGIONS "Regions" +#define kZONES "Zones" +#define kRULES "Rules" +#define kNAMES "Names" +#define kTZVERSION "TZVersion" +#define kLINKS "links" +#define kMAX_CUSTOM_HOUR 23 +#define kMAX_CUSTOM_MIN 59 +#define kMAX_CUSTOM_SEC 59 +#define MINUS 0x002D +#define PLUS 0x002B +#define ZERO_DIGIT 0x0030 +#define COLON 0x003A + +// Static data and constants + +static const char16_t WORLD[] = {0x30, 0x30, 0x31, 0x00}; /* "001" */ + +static const char16_t GMT_ID[] = {0x47, 0x4D, 0x54, 0x00}; /* "GMT" */ +static const char16_t UNKNOWN_ZONE_ID[] = {0x45, 0x74, 0x63, 0x2F, 0x55, 0x6E, 0x6B, 0x6E, 0x6F, 0x77, 0x6E, 0x00}; /* "Etc/Unknown" */ +static const int32_t GMT_ID_LENGTH = 3; +static const int32_t UNKNOWN_ZONE_ID_LENGTH = 11; + +static icu::TimeZone* DEFAULT_ZONE = nullptr; +static icu::UInitOnce gDefaultZoneInitOnce {}; + +alignas(icu::SimpleTimeZone) +static char gRawGMT[sizeof(icu::SimpleTimeZone)]; + +alignas(icu::SimpleTimeZone) +static char gRawUNKNOWN[sizeof(icu::SimpleTimeZone)]; + +static icu::UInitOnce gStaticZonesInitOnce {}; +static UBool gStaticZonesInitialized = false; // Whether the static zones are initialized and ready to use. + +static char TZDATA_VERSION[16]; +static icu::UInitOnce gTZDataVersionInitOnce {}; + +static int32_t* MAP_SYSTEM_ZONES = nullptr; +static int32_t* MAP_CANONICAL_SYSTEM_ZONES = nullptr; +static int32_t* MAP_CANONICAL_SYSTEM_LOCATION_ZONES = nullptr; + +static int32_t LEN_SYSTEM_ZONES = 0; +static int32_t LEN_CANONICAL_SYSTEM_ZONES = 0; +static int32_t LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0; + +static icu::UInitOnce gSystemZonesInitOnce {}; +static icu::UInitOnce gCanonicalZonesInitOnce {}; +static icu::UInitOnce gCanonicalLocationZonesInitOnce {}; + +U_CDECL_BEGIN +static UBool U_CALLCONV timeZone_cleanup() +{ + U_NAMESPACE_USE + delete DEFAULT_ZONE; + DEFAULT_ZONE = nullptr; + gDefaultZoneInitOnce.reset(); + + if (gStaticZonesInitialized) { + reinterpret_cast<SimpleTimeZone*>(gRawGMT)->~SimpleTimeZone(); + reinterpret_cast<SimpleTimeZone*>(gRawUNKNOWN)->~SimpleTimeZone(); + gStaticZonesInitialized = false; + gStaticZonesInitOnce.reset(); + } + + uprv_memset(TZDATA_VERSION, 0, sizeof(TZDATA_VERSION)); + gTZDataVersionInitOnce.reset(); + + LEN_SYSTEM_ZONES = 0; + uprv_free(MAP_SYSTEM_ZONES); + MAP_SYSTEM_ZONES = 0; + gSystemZonesInitOnce.reset(); + + LEN_CANONICAL_SYSTEM_ZONES = 0; + uprv_free(MAP_CANONICAL_SYSTEM_ZONES); + MAP_CANONICAL_SYSTEM_ZONES = 0; + gCanonicalZonesInitOnce.reset(); + + LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0; + uprv_free(MAP_CANONICAL_SYSTEM_LOCATION_ZONES); + MAP_CANONICAL_SYSTEM_LOCATION_ZONES = 0; + gCanonicalLocationZonesInitOnce.reset(); + + return true; +} +U_CDECL_END + +U_NAMESPACE_BEGIN + +static int32_t findInStringArray(UResourceBundle* array, const UnicodeString& id, UErrorCode &status) +{ + UnicodeString copy; + const char16_t *u; + int32_t len; + + int32_t start = 0; + int32_t limit = ures_getSize(array); + int32_t mid; + int32_t lastMid = INT32_MAX; + if(U_FAILURE(status) || (limit < 1)) { + return -1; + } + U_DEBUG_TZ_MSG(("fisa: Looking for %s, between %d and %d\n", U_DEBUG_TZ_STR(UnicodeString(id).getTerminatedBuffer()), start, limit)); + + for (;;) { + mid = (int32_t)((start + limit) / 2); + if (lastMid == mid) { /* Have we moved? */ + break; /* We haven't moved, and it wasn't found. */ + } + lastMid = mid; + u = ures_getStringByIndex(array, mid, &len, &status); + if (U_FAILURE(status)) { + break; + } + U_DEBUG_TZ_MSG(("tz: compare to %s, %d .. [%d] .. %d\n", U_DEBUG_TZ_STR(u), start, mid, limit)); + copy.setTo(true, u, len); + int r = id.compare(copy); + if(r==0) { + U_DEBUG_TZ_MSG(("fisa: found at %d\n", mid)); + return mid; + } else if(r<0) { + limit = mid; + } else { + start = mid; + } + } + U_DEBUG_TZ_MSG(("fisa: not found\n")); + return -1; +} + +/** + * Fetch a specific zone by name. Replaces the getByKey call. + * @param top Top timezone resource + * @param id Time zone ID + * @param oldbundle Bundle for reuse (or nullptr). see 'ures_open()' + * @return the zone's bundle if found, or undefined if error. Reuses oldbundle. + */ +static UResourceBundle* getZoneByName(const UResourceBundle* top, const UnicodeString& id, UResourceBundle *oldbundle, UErrorCode& status) { + // load the Rules object + UResourceBundle *tmp = ures_getByKey(top, kNAMES, nullptr, &status); + + // search for the string + int32_t idx = findInStringArray(tmp, id, status); + + if((idx == -1) && U_SUCCESS(status)) { + // not found + status = U_MISSING_RESOURCE_ERROR; + //ures_close(oldbundle); + //oldbundle = nullptr; + } else { + U_DEBUG_TZ_MSG(("gzbn: oldbundle= size %d, type %d, %s\n", ures_getSize(tmp), ures_getType(tmp), u_errorName(status))); + tmp = ures_getByKey(top, kZONES, tmp, &status); // get Zones object from top + 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))); + oldbundle = ures_getByIndex(tmp, idx, oldbundle, &status); // get nth Zone object + 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))); + } + ures_close(tmp); + if(U_FAILURE(status)) { + //ures_close(oldbundle); + return nullptr; + } else { + return oldbundle; + } +} + + +UResourceBundle* TimeZone::loadRule(const UResourceBundle* top, const UnicodeString& ruleid, UResourceBundle* oldbundle, UErrorCode& status) { + char key[64]; + ruleid.extract(0, sizeof(key)-1, key, (int32_t)sizeof(key)-1, US_INV); + U_DEBUG_TZ_MSG(("loadRule(%s)\n", key)); + UResourceBundle *r = ures_getByKey(top, kRULES, oldbundle, &status); + U_DEBUG_TZ_MSG(("loadRule(%s) -> 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) +{ +#ifdef 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_getType(&res) == URES_INT) { + 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, nullptr, &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; +} + +// ------------------------------------- + +namespace { + +void U_CALLCONV initStaticTimeZones() { + // Initialize _GMT independently of other static data; it should + // be valid even if we can't load the time zone UDataMemory. + ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup); + + // new can't fail below, as we use placement new into statically allocated space. + new(gRawGMT) SimpleTimeZone(0, UnicodeString(true, GMT_ID, GMT_ID_LENGTH)); + new(gRawUNKNOWN) SimpleTimeZone(0, UnicodeString(true, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH)); + + gStaticZonesInitialized = true; +} + +} // anonymous namespace + +const TimeZone& U_EXPORT2 +TimeZone::getUnknown() +{ + umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones); + return *reinterpret_cast<SimpleTimeZone*>(gRawUNKNOWN); +} + +const TimeZone* U_EXPORT2 +TimeZone::getGMT() +{ + umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones); + return reinterpret_cast<SimpleTimeZone*>(gRawGMT); +} + +// ***************************************************************************** +// class TimeZone +// ***************************************************************************** + +UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(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; +} + +// ------------------------------------- + +bool +TimeZone::operator==(const TimeZone& that) const +{ + return typeid(*this) == typeid(that) && + fID == that.fID; +} + +// ------------------------------------- + +namespace { +TimeZone* +createSystemTimeZone(const UnicodeString& id, UErrorCode& ec) { + if (U_FAILURE(ec)) { + return nullptr; + } + TimeZone* z = 0; + StackUResourceBundle res; + U_DEBUG_TZ_MSG(("pre-err=%s\n", u_errorName(ec))); + UResourceBundle *top = openOlsonResource(id, res.ref(), ec); + U_DEBUG_TZ_MSG(("post-err=%s\n", u_errorName(ec))); + if (U_SUCCESS(ec)) { + z = new OlsonTimeZone(top, res.getAlias(), id, ec); + if (z == nullptr) { + ec = U_MEMORY_ALLOCATION_ERROR; + U_DEBUG_TZ_MSG(("cstz: olson time zone failed to initialize - err %s\n", u_errorName(ec))); + } + } + ures_close(top); + if (U_FAILURE(ec)) { + U_DEBUG_TZ_MSG(("cstz: failed to create, err %s\n", u_errorName(ec))); + delete z; + z = nullptr; + } + return z; +} + +/** + * 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* +createSystemTimeZone(const UnicodeString& id) { + UErrorCode ec = U_ZERO_ERROR; + return createSystemTimeZone(id, ec); +} + +} + +TimeZone* U_EXPORT2 +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. + * + * We cannot return nullptr, because that would break compatibility + * with the JDK. + */ + TimeZone* result = createSystemTimeZone(ID); + + if (result == nullptr) { + U_DEBUG_TZ_MSG(("failed to load system time zone with id - falling to custom")); + result = createCustomTimeZone(ID); + } + if (result == nullptr) { + U_DEBUG_TZ_MSG(("failed to load time zone with id - falling to Etc/Unknown(GMT)")); + const TimeZone& unknown = getUnknown(); + // Unknown zone uses statically allocated memory, so creation of it can never fail due to OOM. + result = unknown.clone(); + } + return result; +} + +// ------------------------------------- + +TimeZone* U_EXPORT2 +TimeZone::detectHostTimeZone() +{ + // We access system timezone data through uprv_tzset(), uprv_tzname(), and others, + // which have platform specific implementations in putil.cpp + int32_t rawOffset = 0; + const char *hostID; + UBool hostDetectionSucceeded = true; + + // First, try to create a system timezone, based + // on the string ID in tzname[0]. + + uprv_tzset(); // Initialize tz... system data + + uprv_tzname_clear_cache(); + + // Get the timezone ID from the host. This function should do + // any required host-specific remapping; e.g., on Windows this + // function maps the Windows Time Zone name to an ICU timezone ID. + hostID = uprv_tzname(0); + + // Invert sign because UNIX semantics are backwards + rawOffset = uprv_timezone() * -U_MILLIS_PER_SECOND; + + TimeZone* hostZone = nullptr; + + UnicodeString hostStrID(hostID, -1, US_INV); + + if (hostStrID.length() == 0) { + // The host time zone detection (or remapping) above has failed and + // we have no name at all. Fallback to using the Unknown zone. + hostStrID = UnicodeString(true, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH); + hostDetectionSucceeded = false; + } + + hostZone = createSystemTimeZone(hostStrID); + +#if U_PLATFORM_USES_ONLY_WIN32_API + // hostID points to a heap-allocated location on Windows. + uprv_free(const_cast<char *>(hostID)); +#endif + + int32_t hostIDLen = hostStrID.length(); + if (hostZone != nullptr && rawOffset != hostZone->getRawOffset() + && (3 <= hostIDLen && hostIDLen <= 4)) + { + // Uh oh. This probably wasn't a good id. + // It was probably an ambiguous abbreviation + delete hostZone; + hostZone = nullptr; + } + + // Construct a fixed standard zone with the host's ID + // and raw offset. + if (hostZone == nullptr && hostDetectionSucceeded) { + hostZone = new SimpleTimeZone(rawOffset, hostStrID); + } + + // If we _still_ don't have a time zone, use the Unknown zone. + // + // Note: This is extremely unlikely situation. If + // new SimpleTimeZone(...) above fails, the following + // code may also fail. + if (hostZone == nullptr) { + // Unknown zone uses static allocated memory, so it must always exist. + // However, clone() allocates memory and can fail. + hostZone = TimeZone::getUnknown().clone(); + } + + return hostZone; +} + +// ------------------------------------- + +static UMutex gDefaultZoneMutex; + +/** + * Initialize DEFAULT_ZONE from the system default time zone. + * Upon return, DEFAULT_ZONE will not be nullptr, unless operator new() + * returns nullptr. + */ +static void U_CALLCONV initDefault() +{ + ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup); + + Mutex lock(&gDefaultZoneMutex); + // If setDefault() has already been called we can skip getting the + // default zone information from the system. + if (DEFAULT_ZONE != nullptr) { + return; + } + + // NOTE: this code is safely single threaded, being only + // run via umtx_initOnce(). + // + // Some of the locale/timezone OS functions may not be thread safe, + // + // The operating system might actually use ICU to implement timezones. + // So we may have ICU calling ICU here, like on AIX. + // There shouldn't be a problem with this; initOnce does not hold a mutex + // while the init function is being run. + + // The code detecting the host time zone was separated from this + // and implemented as TimeZone::detectHostTimeZone() + + TimeZone *default_zone = TimeZone::detectHostTimeZone(); + + U_ASSERT(DEFAULT_ZONE == nullptr); + + DEFAULT_ZONE = default_zone; +} + +// ------------------------------------- + +TimeZone* U_EXPORT2 +TimeZone::createDefault() +{ + umtx_initOnce(gDefaultZoneInitOnce, initDefault); + { + Mutex lock(&gDefaultZoneMutex); + return (DEFAULT_ZONE != nullptr) ? DEFAULT_ZONE->clone() : nullptr; + } +} + +// ------------------------------------- + +TimeZone* U_EXPORT2 +TimeZone::forLocaleOrDefault(const Locale& locale) +{ + char buffer[ULOC_KEYWORDS_CAPACITY] = ""; + UErrorCode localStatus = U_ZERO_ERROR; + int32_t count = locale.getKeywordValue("timezone", buffer, sizeof(buffer), localStatus); + if (U_FAILURE(localStatus) || localStatus == U_STRING_NOT_TERMINATED_WARNING) { + // the "timezone" keyword exceeds ULOC_KEYWORDS_CAPACITY; ignore and use default. + count = 0; + } + if (count > 0) { + return TimeZone::createTimeZone(UnicodeString(buffer, count, US_INV)); + } + return TimeZone::createDefault(); +} + +// ------------------------------------- + +void U_EXPORT2 +TimeZone::adoptDefault(TimeZone* zone) +{ + if (zone != nullptr) + { + { + Mutex lock(&gDefaultZoneMutex); + TimeZone *old = DEFAULT_ZONE; + DEFAULT_ZONE = zone; + delete old; + } + ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup); + } +} +// ------------------------------------- + +void U_EXPORT2 +TimeZone::setDefault(const TimeZone& zone) +{ + adoptDefault(zone.clone()); +} + +//---------------------------------------------------------------------- + + +static void U_CALLCONV initMap(USystemTimeZoneType type, UErrorCode& ec) { + ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup); + + UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec); + res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section + if (U_SUCCESS(ec)) { + int32_t size = ures_getSize(res); + int32_t *m = (int32_t *)uprv_malloc(size * sizeof(int32_t)); + if (m == nullptr) { + ec = U_MEMORY_ALLOCATION_ERROR; + } else { + int32_t numEntries = 0; + for (int32_t i = 0; i < size; i++) { + UnicodeString id = ures_getUnicodeStringByIndex(res, i, &ec); + if (U_FAILURE(ec)) { + break; + } + if (0 == id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH)) { + // exclude Etc/Unknown + continue; + } + if (type == UCAL_ZONE_TYPE_CANONICAL || type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) { + UnicodeString canonicalID; + ZoneMeta::getCanonicalCLDRID(id, canonicalID, ec); + if (U_FAILURE(ec)) { + break; + } + if (canonicalID != id) { + // exclude aliases + continue; + } + } + if (type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) { + const char16_t *region = TimeZone::getRegion(id, ec); + if (U_FAILURE(ec)) { + break; + } + if (u_strcmp(region, WORLD) == 0) { + // exclude non-location ("001") + continue; + } + } + m[numEntries++] = i; + } + if (U_SUCCESS(ec)) { + int32_t *tmp = m; + m = (int32_t *)uprv_realloc(tmp, numEntries * sizeof(int32_t)); + if (m == nullptr) { + // realloc failed.. use the original one even it has unused + // area at the end + m = tmp; + } + + switch(type) { + case UCAL_ZONE_TYPE_ANY: + U_ASSERT(MAP_SYSTEM_ZONES == nullptr); + MAP_SYSTEM_ZONES = m; + LEN_SYSTEM_ZONES = numEntries; + break; + case UCAL_ZONE_TYPE_CANONICAL: + U_ASSERT(MAP_CANONICAL_SYSTEM_ZONES == nullptr); + MAP_CANONICAL_SYSTEM_ZONES = m; + LEN_CANONICAL_SYSTEM_ZONES = numEntries; + break; + case UCAL_ZONE_TYPE_CANONICAL_LOCATION: + U_ASSERT(MAP_CANONICAL_SYSTEM_LOCATION_ZONES == nullptr); + MAP_CANONICAL_SYSTEM_LOCATION_ZONES = m; + LEN_CANONICAL_SYSTEM_LOCATION_ZONES = numEntries; + break; + } + } + } + } + ures_close(res); +} + + +/** + * 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(); + if (!local) { + date += rawOffset; // now in local standard millis + } + + // When local == true, date might not be in local standard + // millis. getOffset taking 7 parameters used here assume + // the given time in day is local standard time. + // At STD->DST transition, there is a range of time which + // does not exist. When 'date' is in this time range + // (and local == true), this method interprets the specified + // local time as DST. At DST->STD transition, there is a + // range of time which occurs twice. In this case, this + // method interprets the specified local time as STD. + // To support the behavior above, we need to call getOffset + // (with 7 args) twice when local == true and DST is + // detected in the initial call. + for (int32_t pass=0; ; ++pass) { + int32_t year, month, dom, dow, millis; + double day = ClockMath::floorDivide(date, U_MILLIS_PER_DAY, &millis); + + 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==true, dstOffset!=0. + if (pass!=0 || !local || dstOffset == 0) { + break; + } + // adjust to local standard millis + date -= dstOffset; + } +} + +// ------------------------------------- + +// New available IDs API as of ICU 2.4. Uses StringEnumeration API. + +class TZEnumeration : public StringEnumeration { +private: + + // 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==nullptr + // then our results are zone[i] for i=0..len-1. Len will be zero + // if the zone data could not be loaded. + int32_t* map; + int32_t* localMap; + int32_t len; + int32_t pos; + + TZEnumeration(int32_t* mapData, int32_t mapLen, UBool adoptMapData) : pos(0) { + map = mapData; + localMap = adoptMapData ? mapData : nullptr; + len = mapLen; + } + + UBool getID(int32_t i, UErrorCode& ec) { + int32_t idLen = 0; + const char16_t* id = nullptr; + 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 int32_t* getMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) { + len = 0; + if (U_FAILURE(ec)) { + return nullptr; + } + int32_t* m = nullptr; + switch (type) { + case UCAL_ZONE_TYPE_ANY: + umtx_initOnce(gSystemZonesInitOnce, &initMap, type, ec); + m = MAP_SYSTEM_ZONES; + len = LEN_SYSTEM_ZONES; + break; + case UCAL_ZONE_TYPE_CANONICAL: + umtx_initOnce(gCanonicalZonesInitOnce, &initMap, type, ec); + m = MAP_CANONICAL_SYSTEM_ZONES; + len = LEN_CANONICAL_SYSTEM_ZONES; + break; + case UCAL_ZONE_TYPE_CANONICAL_LOCATION: + umtx_initOnce(gCanonicalLocationZonesInitOnce, &initMap, type, ec); + m = MAP_CANONICAL_SYSTEM_LOCATION_ZONES; + len = LEN_CANONICAL_SYSTEM_LOCATION_ZONES; + break; + default: + ec = U_ILLEGAL_ARGUMENT_ERROR; + m = nullptr; + len = 0; + break; + } + return m; + } + +public: + +#define DEFAULT_FILTERED_MAP_SIZE 8 +#define MAP_INCREMENT_SIZE 8 + + static TZEnumeration* create(USystemTimeZoneType type, const char* region, const int32_t* rawOffset, UErrorCode& ec) { + if (U_FAILURE(ec)) { + return nullptr; + } + + int32_t baseLen; + int32_t *baseMap = getMap(type, baseLen, ec); + + if (U_FAILURE(ec)) { + return nullptr; + } + + // If any additional conditions are available, + // create instance local map filtered by the conditions. + + int32_t *filteredMap = nullptr; + int32_t numEntries = 0; + + if (region != nullptr || rawOffset != nullptr) { + int32_t filteredMapSize = DEFAULT_FILTERED_MAP_SIZE; + filteredMap = (int32_t *)uprv_malloc(filteredMapSize * sizeof(int32_t)); + if (filteredMap == nullptr) { + ec = U_MEMORY_ALLOCATION_ERROR; + return nullptr; + } + + // Walk through the base map + UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec); + res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section + for (int32_t i = 0; i < baseLen; i++) { + int32_t zidx = baseMap[i]; + UnicodeString id = ures_getUnicodeStringByIndex(res, zidx, &ec); + if (U_FAILURE(ec)) { + break; + } + if (region != nullptr) { + // Filter by region + char tzregion[4]; // max 3 letters + null term + TimeZone::getRegion(id, tzregion, sizeof(tzregion), ec); + if (U_FAILURE(ec)) { + break; + } + if (uprv_stricmp(tzregion, region) != 0) { + // region does not match + continue; + } + } + if (rawOffset != nullptr) { + // Filter by raw offset + // Note: This is VERY inefficient + TimeZone *z = createSystemTimeZone(id, ec); + if (U_FAILURE(ec)) { + break; + } + int32_t tzoffset = z->getRawOffset(); + delete z; + + if (tzoffset != *rawOffset) { + continue; + } + } + + if (filteredMapSize <= numEntries) { + filteredMapSize += MAP_INCREMENT_SIZE; + int32_t *tmp = (int32_t *)uprv_realloc(filteredMap, filteredMapSize * sizeof(int32_t)); + if (tmp == nullptr) { + ec = U_MEMORY_ALLOCATION_ERROR; + break; + } else { + filteredMap = tmp; + } + } + + filteredMap[numEntries++] = zidx; + } + + if (U_FAILURE(ec)) { + uprv_free(filteredMap); + filteredMap = nullptr; + } + + ures_close(res); + } + + TZEnumeration *result = nullptr; + if (U_SUCCESS(ec)) { + // Finally, create a new enumeration instance + if (filteredMap == nullptr) { + result = new TZEnumeration(baseMap, baseLen, false); + } else { + result = new TZEnumeration(filteredMap, numEntries, true); + filteredMap = nullptr; + } + if (result == nullptr) { + ec = U_MEMORY_ALLOCATION_ERROR; + } + } + + if (filteredMap != nullptr) { + uprv_free(filteredMap); + } + + return result; + } + + TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(nullptr), localMap(nullptr), len(0), pos(0) { + if (other.localMap != nullptr) { + localMap = (int32_t *)uprv_malloc(other.len * sizeof(int32_t)); + if (localMap != nullptr) { + len = other.len; + uprv_memcpy(localMap, other.localMap, len * sizeof(int32_t)); + pos = other.pos; + map = localMap; + } else { + len = 0; + pos = 0; + map = nullptr; + } + } else { + map = other.map; + localMap = nullptr; + len = other.len; + pos = other.pos; + } + } + + virtual ~TZEnumeration(); + + virtual StringEnumeration *clone() const override { + return new TZEnumeration(*this); + } + + virtual int32_t count(UErrorCode& status) const override { + return U_FAILURE(status) ? 0 : len; + } + + virtual const UnicodeString* snext(UErrorCode& status) override { + if (U_SUCCESS(status) && map != nullptr && pos < len) { + getID(map[pos], status); + ++pos; + return &unistr; + } + return 0; + } + + virtual void reset(UErrorCode& /*status*/) override { + pos = 0; + } + +public: + static UClassID U_EXPORT2 getStaticClassID(); + virtual UClassID getDynamicClassID() const override; +}; + +TZEnumeration::~TZEnumeration() { + if (localMap != nullptr) { + uprv_free(localMap); + } +} + +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration) + +StringEnumeration* U_EXPORT2 +TimeZone::createTimeZoneIDEnumeration( + USystemTimeZoneType zoneType, + const char* region, + const int32_t* rawOffset, + UErrorCode& ec) { + return TZEnumeration::create(zoneType, region, rawOffset, ec); +} + +StringEnumeration* U_EXPORT2 +TimeZone::createEnumeration(UErrorCode& status) { + return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, nullptr, nullptr, status); +} + +StringEnumeration* U_EXPORT2 +TimeZone::createEnumerationForRawOffset(int32_t rawOffset, UErrorCode& status) { + return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, nullptr, &rawOffset, status); +} + +StringEnumeration* U_EXPORT2 +TimeZone::createEnumerationForRegion(const char* region, UErrorCode& status) { + return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, region, nullptr, status); +} + +// +// Next 3 methods are equivalent to above, but ignores UErrorCode. +// These methods were deprecated in ICU 70. + +StringEnumeration* U_EXPORT2 +TimeZone::createEnumeration() { + UErrorCode ec = U_ZERO_ERROR; + return createEnumeration(ec); +} + +StringEnumeration* U_EXPORT2 +TimeZone::createEnumeration(int32_t rawOffset) { + UErrorCode ec = U_ZERO_ERROR; + return createEnumerationForRawOffset(rawOffset, ec); +} + +StringEnumeration* U_EXPORT2 +TimeZone::createEnumeration(const char* region) { + UErrorCode ec = U_ZERO_ERROR; + return createEnumerationForRegion(region, ec); +} + +// --------------------------------------- + +int32_t U_EXPORT2 +TimeZone::countEquivalentIDs(const UnicodeString& id) { + int32_t result = 0; + UErrorCode ec = U_ZERO_ERROR; + StackUResourceBundle res; + U_DEBUG_TZ_MSG(("countEquivalentIDs..\n")); + UResourceBundle *top = openOlsonResource(id, res.ref(), ec); + if (U_SUCCESS(ec)) { + StackUResourceBundle r; + ures_getByKey(res.getAlias(), kLINKS, r.getAlias(), &ec); + ures_getIntVector(r.getAlias(), &result, &ec); + } + ures_close(top); + return result; +} + +// --------------------------------------- + +const UnicodeString U_EXPORT2 +TimeZone::getEquivalentID(const UnicodeString& id, int32_t index) { + U_DEBUG_TZ_MSG(("gEI(%d)\n", index)); + UnicodeString result; + UErrorCode ec = U_ZERO_ERROR; + StackUResourceBundle res; + UResourceBundle *top = openOlsonResource(id, res.ref(), ec); + int32_t zone = -1; + if (U_SUCCESS(ec)) { + StackUResourceBundle r; + int32_t size; + ures_getByKey(res.getAlias(), kLINKS, r.getAlias(), &ec); + const int32_t *v = ures_getIntVector(r.getAlias(), &size, &ec); + if (U_SUCCESS(ec)) { + if (index >= 0 && index < size) { + zone = v[index]; + } + } + } + if (zone >= 0) { + UResourceBundle *ares = ures_getByKey(top, kNAMES, nullptr, &ec); // dereference Zones section + if (U_SUCCESS(ec)) { + int32_t idLen = 0; + const char16_t* id2 = ures_getStringByIndex(ares, zone, &idLen, &ec); + result.fastCopyFrom(UnicodeString(true, id2, 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; +} + +// --------------------------------------- + +// These methods are used by ZoneMeta class only. + +const char16_t* +TimeZone::findID(const UnicodeString& id) { + const char16_t *result = nullptr; + UErrorCode ec = U_ZERO_ERROR; + UResourceBundle *rb = ures_openDirect(nullptr, kZONEINFO, &ec); + + // resolve zone index by name + UResourceBundle *names = ures_getByKey(rb, kNAMES, nullptr, &ec); + int32_t idx = findInStringArray(names, id, ec); + result = ures_getStringByIndex(names, idx, nullptr, &ec); + if (U_FAILURE(ec)) { + result = nullptr; + } + ures_close(names); + ures_close(rb); + return result; +} + + +const char16_t* +TimeZone::dereferOlsonLink(const UnicodeString& id) { + const char16_t *result = nullptr; + UErrorCode ec = U_ZERO_ERROR; + UResourceBundle *rb = ures_openDirect(nullptr, kZONEINFO, &ec); + + // resolve zone index by name + UResourceBundle *names = ures_getByKey(rb, kNAMES, nullptr, &ec); + int32_t idx = findInStringArray(names, id, ec); + result = ures_getStringByIndex(names, idx, nullptr, &ec); + + // open the zone bundle by index + ures_getByKey(rb, kZONES, rb, &ec); + ures_getByIndex(rb, idx, rb, &ec); + + if (U_SUCCESS(ec)) { + if (ures_getType(rb) == URES_INT) { + // this is a link - dereference the link + int32_t deref = ures_getInt(rb, &ec); + const char16_t* tmp = ures_getStringByIndex(names, deref, nullptr, &ec); + if (U_SUCCESS(ec)) { + result = tmp; + } + } + } + + ures_close(names); + ures_close(rb); + + return result; +} + +const char16_t* +TimeZone::getRegion(const UnicodeString& id) { + UErrorCode status = U_ZERO_ERROR; + return getRegion(id, status); +} + +const char16_t* +TimeZone::getRegion(const UnicodeString& id, UErrorCode& status) { + if (U_FAILURE(status)) { + return nullptr; + } + const char16_t *result = nullptr; + UResourceBundle *rb = ures_openDirect(nullptr, kZONEINFO, &status); + + // resolve zone index by name + UResourceBundle *res = ures_getByKey(rb, kNAMES, nullptr, &status); + int32_t idx = findInStringArray(res, id, status); + + // get region mapping + ures_getByKey(rb, kREGIONS, res, &status); + const char16_t *tmp = ures_getStringByIndex(res, idx, nullptr, &status); + if (U_SUCCESS(status)) { + result = tmp; + } + + ures_close(res); + ures_close(rb); + + return result; +} + + +// --------------------------------------- +int32_t +TimeZone::getRegion(const UnicodeString& id, char *region, int32_t capacity, UErrorCode& status) +{ + int32_t resultLen = 0; + *region = 0; + if (U_FAILURE(status)) { + return 0; + } + + const char16_t *uregion = nullptr; + // "Etc/Unknown" is not a system zone ID, + // but in the zone data + if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) != 0) { + uregion = getRegion(id); + } + if (uregion == nullptr) { + status = U_ILLEGAL_ARGUMENT_ERROR; + return 0; + } + resultLen = u_strlen(uregion); + // A region code is represented by invariant characters + u_UCharsToChars(uregion, region, uprv_min(resultLen, capacity)); + + if (capacity < resultLen) { + status = U_BUFFER_OVERFLOW_ERROR; + return resultLen; + } + + return u_terminateChars(region, capacity, resultLen, &status); +} + +// --------------------------------------- + + +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 inDaylight, EDisplayType style, UnicodeString& result) const +{ + return getDisplayName(inDaylight,style, Locale::getDefault(), result); +} +//-------------------------------------- +int32_t +TimeZone::getDSTSavings()const { + if (useDaylightTime()) { + return 3600000; + } + return 0; +} +//--------------------------------------- +UnicodeString& +TimeZone::getDisplayName(UBool inDaylight, EDisplayType style, const Locale& locale, UnicodeString& result) const +{ + UErrorCode status = U_ZERO_ERROR; + UDate date = Calendar::getNow(); + UTimeZoneFormatTimeType timeType = UTZFMT_TIME_TYPE_UNKNOWN; + int32_t offset; + + if (style == GENERIC_LOCATION || style == LONG_GENERIC || style == SHORT_GENERIC) { + LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status)); + if (U_FAILURE(status)) { + result.remove(); + return result; + } + // Generic format + switch (style) { + case GENERIC_LOCATION: + tzfmt->format(UTZFMT_STYLE_GENERIC_LOCATION, *this, date, result, &timeType); + break; + case LONG_GENERIC: + tzfmt->format(UTZFMT_STYLE_GENERIC_LONG, *this, date, result, &timeType); + break; + case SHORT_GENERIC: + tzfmt->format(UTZFMT_STYLE_GENERIC_SHORT, *this, date, result, &timeType); + break; + default: + UPRV_UNREACHABLE_EXIT; + } + // Generic format many use Localized GMT as the final fallback. + // When Localized GMT format is used, the result might not be + // appropriate for the requested daylight value. + if ((inDaylight && timeType == UTZFMT_TIME_TYPE_STANDARD) || (!inDaylight && timeType == UTZFMT_TIME_TYPE_DAYLIGHT)) { + offset = inDaylight ? getRawOffset() + getDSTSavings() : getRawOffset(); + if (style == SHORT_GENERIC) { + tzfmt->formatOffsetShortLocalizedGMT(offset, result, status); + } else { + tzfmt->formatOffsetLocalizedGMT(offset, result, status); + } + } + } else if (style == LONG_GMT || style == SHORT_GMT) { + LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status)); + if (U_FAILURE(status)) { + result.remove(); + return result; + } + offset = inDaylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset(); + switch (style) { + case LONG_GMT: + tzfmt->formatOffsetLocalizedGMT(offset, result, status); + break; + case SHORT_GMT: + tzfmt->formatOffsetISO8601Basic(offset, false, false, false, result, status); + break; + default: + UPRV_UNREACHABLE_EXIT; + } + + } else { + U_ASSERT(style == LONG || style == SHORT || style == SHORT_COMMONLY_USED); + UTimeZoneNameType nameType = UTZNM_UNKNOWN; + switch (style) { + case LONG: + nameType = inDaylight ? UTZNM_LONG_DAYLIGHT : UTZNM_LONG_STANDARD; + break; + case SHORT: + case SHORT_COMMONLY_USED: + nameType = inDaylight ? UTZNM_SHORT_DAYLIGHT : UTZNM_SHORT_STANDARD; + break; + default: + UPRV_UNREACHABLE_EXIT; + } + LocalPointer<TimeZoneNames> tznames(TimeZoneNames::createInstance(locale, status)); + if (U_FAILURE(status)) { + result.remove(); + return result; + } + UnicodeString canonicalID(ZoneMeta::getCanonicalCLDRID(*this)); + tznames->getDisplayName(canonicalID, nameType, date, result); + if (result.isEmpty()) { + // Fallback to localized GMT + LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status)); + offset = inDaylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset(); + if (style == LONG) { + tzfmt->formatOffsetLocalizedGMT(offset, result, status); + } else { + tzfmt->formatOffsetShortLocalizedGMT(offset, result, status); + } + } + } + if (U_FAILURE(status)) { + result.remove(); + } + return result; +} + +/** + * 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) +{ + int32_t sign, hour, min, sec; + if (parseCustomID(id, sign, hour, min, sec)) { + UnicodeString customID; + formatCustomID(hour, min, sec, (sign < 0), customID); + int32_t offset = sign * ((hour * 60 + min) * 60 + sec) * 1000; + return new SimpleTimeZone(offset, customID); + } + return nullptr; +} + +UnicodeString& +TimeZone::getCustomID(const UnicodeString& id, UnicodeString& normalized, UErrorCode& status) { + normalized.remove(); + if (U_FAILURE(status)) { + return normalized; + } + int32_t sign, hour, min, sec; + if (parseCustomID(id, sign, hour, min, sec)) { + formatCustomID(hour, min, sec, (sign < 0), normalized); + } else { + status = U_ILLEGAL_ARGUMENT_ERROR; + } + return normalized; +} + +UBool +TimeZone::parseCustomID(const UnicodeString& id, int32_t& sign, + int32_t& hour, int32_t& min, int32_t& sec) { + static const int32_t kParseFailed = -99999; + + NumberFormat* numberFormat = 0; + UnicodeString idUppercase = id; + idUppercase.toUpper(""); + + if (id.length() > GMT_ID_LENGTH && + idUppercase.startsWith(GMT_ID, GMT_ID_LENGTH)) + { + ParsePosition pos(GMT_ID_LENGTH); + sign = 1; + hour = 0; + min = 0; + sec = 0; + + if (id[pos.getIndex()] == MINUS /*'-'*/) { + sign = -1; + } else if (id[pos.getIndex()] != PLUS /*'+'*/) { + return false; + } + pos.setIndex(pos.getIndex() + 1); + + UErrorCode success = U_ZERO_ERROR; + numberFormat = NumberFormat::createInstance(success); + if(U_FAILURE(success)){ + return false; + } + numberFormat->setParseIntegerOnly(true); + //numberFormat->setLenient(true); // TODO: May need to set this, depends on latest timezone parsing + + // 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 false; + } + hour = n.getLong(); + + if (pos.getIndex() < id.length()) { + if (pos.getIndex() - start > 2 + || id[pos.getIndex()] != COLON) { + delete numberFormat; + return false; + } + // hh:mm + pos.setIndex(pos.getIndex() + 1); + int32_t oldPos = pos.getIndex(); + n.setLong(kParseFailed); + numberFormat->parse(id, n, pos); + if ((pos.getIndex() - oldPos) != 2) { + // must be 2 digits + delete numberFormat; + return false; + } + min = n.getLong(); + if (pos.getIndex() < id.length()) { + if (id[pos.getIndex()] != COLON) { + delete numberFormat; + return false; + } + // [:ss] + pos.setIndex(pos.getIndex() + 1); + oldPos = pos.getIndex(); + n.setLong(kParseFailed); + numberFormat->parse(id, n, pos); + if (pos.getIndex() != id.length() + || (pos.getIndex() - oldPos) != 2) { + delete numberFormat; + return false; + } + sec = n.getLong(); + } + } else { + // Supported formats are below - + // + // HHmmss + // Hmmss + // HHmm + // Hmm + // HH + // H + + int32_t length = pos.getIndex() - start; + if (length <= 0 || 6 < length) { + // invalid length + delete numberFormat; + return false; + } + switch (length) { + case 1: + case 2: + // already set to hour + break; + case 3: + case 4: + min = hour % 100; + hour /= 100; + break; + case 5: + case 6: + sec = hour % 100; + min = (hour/100) % 100; + hour /= 10000; + break; + } + } + + delete numberFormat; + + if (hour > kMAX_CUSTOM_HOUR || min > kMAX_CUSTOM_MIN || sec > kMAX_CUSTOM_SEC) { + return false; + } + return true; + } + return false; +} + +UnicodeString& +TimeZone::formatCustomID(int32_t hour, int32_t min, int32_t sec, + UBool negative, UnicodeString& id) { + // Create time zone ID - GMT[+|-]hhmm[ss] + id.setTo(GMT_ID, GMT_ID_LENGTH); + if (hour | min | sec) { + if (negative) { + id += (char16_t)MINUS; + } else { + id += (char16_t)PLUS; + } + + if (hour < 10) { + id += (char16_t)ZERO_DIGIT; + } else { + id += (char16_t)(ZERO_DIGIT + hour/10); + } + id += (char16_t)(ZERO_DIGIT + hour%10); + id += (char16_t)COLON; + if (min < 10) { + id += (char16_t)ZERO_DIGIT; + } else { + id += (char16_t)(ZERO_DIGIT + min/10); + } + id += (char16_t)(ZERO_DIGIT + min%10); + + if (sec) { + id += (char16_t)COLON; + if (sec < 10) { + id += (char16_t)ZERO_DIGIT; + } else { + id += (char16_t)(ZERO_DIGIT + sec/10); + } + id += (char16_t)(ZERO_DIGIT + sec%10); + } + } + return id; +} + + +UBool +TimeZone::hasSameRules(const TimeZone& other) const +{ + return (getRawOffset() == other.getRawOffset() && + useDaylightTime() == other.useDaylightTime()); +} + +static void U_CALLCONV initTZDataVersion(UErrorCode &status) { + ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup); + int32_t len = 0; + StackUResourceBundle bundle; + ures_openDirectFillIn(bundle.getAlias(), nullptr, kZONEINFO, &status); + const char16_t *tzver = ures_getStringByKey(bundle.getAlias(), kTZVERSION, &len, &status); + + if (U_SUCCESS(status)) { + if (len >= (int32_t)sizeof(TZDATA_VERSION)) { + // Ensure that there is always space for a trailing nul in TZDATA_VERSION + len = sizeof(TZDATA_VERSION) - 1; + } + u_UCharsToChars(tzver, TZDATA_VERSION, len); + } +} + +const char* +TimeZone::getTZDataVersion(UErrorCode& status) +{ + umtx_initOnce(gTZDataVersionInitOnce, &initTZDataVersion, status); + return (const char*)TZDATA_VERSION; +} + +UnicodeString& +TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UErrorCode& status) +{ + UBool isSystemID = false; + return getCanonicalID(id, canonicalID, isSystemID, status); +} + +UnicodeString& +TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UBool& isSystemID, + UErrorCode& status) +{ + canonicalID.remove(); + isSystemID = false; + if (U_FAILURE(status)) { + return canonicalID; + } + if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) == 0) { + // special case - Etc/Unknown is a canonical ID, but not system ID + canonicalID.fastCopyFrom(id); + isSystemID = false; + } else { + ZoneMeta::getCanonicalCLDRID(id, canonicalID, status); + if (U_SUCCESS(status)) { + isSystemID = true; + } else { + // Not a system ID + status = U_ZERO_ERROR; + getCustomID(id, canonicalID, status); + } + } + return canonicalID; +} + +UnicodeString& +TimeZone::getWindowsID(const UnicodeString& id, UnicodeString& winid, UErrorCode& status) { + winid.remove(); + if (U_FAILURE(status)) { + return winid; + } + + // canonicalize the input ID + UnicodeString canonicalID; + UBool isSystemID = false; + + getCanonicalID(id, canonicalID, isSystemID, status); + if (U_FAILURE(status) || !isSystemID) { + // mapping data is only applicable to tz database IDs + if (status == U_ILLEGAL_ARGUMENT_ERROR) { + // getWindowsID() sets an empty string where + // getCanonicalID() sets a U_ILLEGAL_ARGUMENT_ERROR. + status = U_ZERO_ERROR; + } + return winid; + } + + UResourceBundle *mapTimezones = ures_openDirect(nullptr, "windowsZones", &status); + ures_getByKey(mapTimezones, "mapTimezones", mapTimezones, &status); + + if (U_FAILURE(status)) { + return winid; + } + + UResourceBundle *winzone = nullptr; + UBool found = false; + while (ures_hasNext(mapTimezones) && !found) { + winzone = ures_getNextResource(mapTimezones, winzone, &status); + if (U_FAILURE(status)) { + break; + } + if (ures_getType(winzone) != URES_TABLE) { + continue; + } + UResourceBundle *regionalData = nullptr; + while (ures_hasNext(winzone) && !found) { + regionalData = ures_getNextResource(winzone, regionalData, &status); + if (U_FAILURE(status)) { + break; + } + if (ures_getType(regionalData) != URES_STRING) { + continue; + } + int32_t len; + const char16_t *tzids = ures_getString(regionalData, &len, &status); + if (U_FAILURE(status)) { + break; + } + + const char16_t *start = tzids; + UBool hasNext = true; + while (hasNext) { + const char16_t *end = u_strchr(start, (char16_t)0x20); + if (end == nullptr) { + end = tzids + len; + hasNext = false; + } + if (canonicalID.compare(start, static_cast<int32_t>(end - start)) == 0) { + winid = UnicodeString(ures_getKey(winzone), -1 , US_INV); + found = true; + break; + } + start = end + 1; + } + } + ures_close(regionalData); + } + ures_close(winzone); + ures_close(mapTimezones); + + return winid; +} + +#define MAX_WINDOWS_ID_SIZE 128 + +UnicodeString& +TimeZone::getIDForWindowsID(const UnicodeString& winid, const char* region, UnicodeString& id, UErrorCode& status) { + id.remove(); + if (U_FAILURE(status)) { + return id; + } + + UResourceBundle *zones = ures_openDirect(nullptr, "windowsZones", &status); + ures_getByKey(zones, "mapTimezones", zones, &status); + if (U_FAILURE(status)) { + ures_close(zones); + return id; + } + + UErrorCode tmperr = U_ZERO_ERROR; + char winidKey[MAX_WINDOWS_ID_SIZE]; + int32_t winKeyLen = winid.extract(0, winid.length(), winidKey, sizeof(winidKey) - 1, US_INV); + + if (winKeyLen == 0 || winKeyLen >= (int32_t)sizeof(winidKey)) { + ures_close(zones); + return id; + } + winidKey[winKeyLen] = 0; + + ures_getByKey(zones, winidKey, zones, &tmperr); // use tmperr, because windows mapping might not + // be available by design + if (U_FAILURE(tmperr)) { + ures_close(zones); + return id; + } + + const char16_t *tzid = nullptr; + int32_t len = 0; + UBool gotID = false; + if (region) { + const char16_t *tzids = ures_getStringByKey(zones, region, &len, &tmperr); // use tmperr, because + // regional mapping is optional + if (U_SUCCESS(tmperr)) { + // first ID delimited by space is the default one + const char16_t *end = u_strchr(tzids, (char16_t)0x20); + if (end == nullptr) { + id.setTo(tzids, -1); + } else { + id.setTo(tzids, static_cast<int32_t>(end - tzids)); + } + gotID = true; + } + } + + if (!gotID) { + tzid = ures_getStringByKey(zones, "001", &len, &status); // using status, because "001" must be + // available at this point + if (U_SUCCESS(status)) { + id.setTo(tzid, len); + } + } + + ures_close(zones); + return id; +} + + +U_NAMESPACE_END + +#endif /* #if !UCONFIG_NO_FORMATTING */ + +//eof |