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+// © 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