The Tor Browser: intl/icu/source/i18n/timezone.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/timezone.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/timezone.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
 *******************************************************************************
 * Copyright (C) 1997-2013, 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 UChar         WORLD[] = {0x30, 0x30, 0x31, 0x00}; /* "001" */
 static const UChar         GMT_ID[] = {0x47, 0x4D, 0x54, 0x00}; /* "GMT" */
 static const UChar         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 = NULL;
 static icu::UInitOnce gDefaultZoneInitOnce = U_INITONCE_INITIALIZER;
 static icu::TimeZone* _GMT = NULL;
 static icu::TimeZone* _UNKNOWN_ZONE = NULL;
 static icu::UInitOnce gStaticZonesInitOnce = U_INITONCE_INITIALIZER;
 static char TZDATA_VERSION[16];
 static icu::UInitOnce gTZDataVersionInitOnce = U_INITONCE_INITIALIZER;
 static int32_t* MAP_SYSTEM_ZONES = NULL;
 static int32_t* MAP_CANONICAL_SYSTEM_ZONES = NULL;
 static int32_t* MAP_CANONICAL_SYSTEM_LOCATION_ZONES = NULL;
 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 = U_INITONCE_INITIALIZER;
 static icu::UInitOnce gCanonicalZonesInitOnce = U_INITONCE_INITIALIZER;
 static icu::UInitOnce gCanonicalLocationZonesInitOnce = U_INITONCE_INITIALIZER;
 U_CDECL_BEGIN
 static UBool U_CALLCONV timeZone_cleanup(void)
 {
     U_NAMESPACE_USE
     delete DEFAULT_ZONE;
     DEFAULT_ZONE = NULL;
     gDefaultZoneInitOnce.reset();
     delete _GMT;
     _GMT = NULL;
     delete _UNKNOWN_ZONE;
     _UNKNOWN_ZONE = NULL;
     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 UChar *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 NULL).   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, NULL, &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 = NULL;
     } 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 NULL;
     } 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)
 {
 #if U_DEBUG_TZ
     char buf[128];
     id.extract(0, sizeof(buf)-1, buf, sizeof(buf), "");
 #endif
     UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
     U_DEBUG_TZ_MSG(("pre: res sz=%d\n", ures_getSize(&res)));
     /* &res = */ getZoneByName(top, id, &res, ec);
     // Dereference if this is an alias.  Docs say result should be 1
     // but it is 0 in 2.8 (?).
     U_DEBUG_TZ_MSG(("Loading zone '%s' (%s, size %d) - %s\n", buf, ures_getKey((UResourceBundle*)&res), ures_getSize(&res), u_errorName(ec)));
     if (ures_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, NULL, &ec); // dereference Zones section
         ures_getByIndex(ares, deref, &res, &ec);
         ures_close(ares);
         U_DEBUG_TZ_MSG(("alias to #%d (%s) - %s\n", deref, "??", u_errorName(ec)));
     } else {
         U_DEBUG_TZ_MSG(("not an alias - size %d\n", ures_getSize(&res)));
     }
     U_DEBUG_TZ_MSG(("%s - final status is %s\n", buf, u_errorName(ec)));
     return top;
 }
 // -------------------------------------
 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);
     _UNKNOWN_ZONE = new SimpleTimeZone(0, UnicodeString(TRUE, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH));
     _GMT = new SimpleTimeZone(0, UnicodeString(TRUE, GMT_ID, GMT_ID_LENGTH));
 }
 }  // anonymous namespace
 const TimeZone& U_EXPORT2
 TimeZone::getUnknown()
 {
     umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
     return *_UNKNOWN_ZONE;
 }
 const TimeZone* U_EXPORT2
 TimeZone::getGMT(void)
 {
     umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
     return _GMT;
 }
 // *****************************************************************************
 // 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;
 }
 // -------------------------------------
 UBool
 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 NULL;
     }
     TimeZone* z = 0;
     UResourceBundle res;
     ures_initStackObject(&res);
     U_DEBUG_TZ_MSG(("pre-err=%s\n", u_errorName(ec)));
     UResourceBundle *top = openOlsonResource(id, res, ec);
     U_DEBUG_TZ_MSG(("post-err=%s\n", u_errorName(ec)));
     if (U_SUCCESS(ec)) {
         z = new OlsonTimeZone(top, &res, id, ec);
         if (z == NULL) {
           U_DEBUG_TZ_MSG(("cstz: olson time zone failed to initialize - err %s\n", u_errorName(ec)));
         }
     }
     ures_close(&res);
     ures_close(top);
     if (U_FAILURE(ec)) {
         U_DEBUG_TZ_MSG(("cstz: failed to create, err %s\n", u_errorName(ec)));
         delete z;
         z = 0;
     }
     return z;
 }
 /**
  * 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 NULL, because that would break compatibility
      * with the JDK.
      */
     TimeZone* result = createSystemTimeZone(ID);
     if (result == 0) {
         U_DEBUG_TZ_MSG(("failed to load system time zone with id - falling to custom"));
         result = createCustomTimeZone(ID);
     }
     if (result == 0) {
         U_DEBUG_TZ_MSG(("failed to load time zone with id - falling to Etc/Unknown(GMT)"));
         result = getUnknown().clone();
     }
     return result;
 }
 // -------------------------------------
 /**
  * Initialize DEFAULT_ZONE from the system default time zone.
  * Upon return, DEFAULT_ZONE will not be NULL, unless operator new()
  * returns NULL.
  */
 static void U_CALLCONV initDefault()
 {
     ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
     // If setDefault() has already been called we can skip getting the
     // default zone information from the system.
     if (DEFAULT_ZONE != NULL) {
         return;
     }
     // We access system timezone data through TPlatformUtilities,
     // including tzset(), timezone, and tzname[].
     int32_t rawOffset = 0;
     const char *hostID;
     // First, try to create a system timezone, based
     // on the string ID in tzname[0].
     // NOTE:  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.
     uprv_tzset(); // Initialize tz... system data
     // Get the timezone ID from the host.  This function should do
     // any required host-specific remapping; e.g., on Windows this
     // function maps the Date and Time control panel setting to an
     // ICU timezone ID.
     hostID = uprv_tzname(0);
     // Invert sign because UNIX semantics are backwards
     rawOffset = uprv_timezone() * -U_MILLIS_PER_SECOND;
     TimeZone* default_zone = NULL;
     /* Make sure that the string is NULL terminated to prevent BoundsChecker/Purify warnings. */
     UnicodeString hostStrID(hostID, -1, US_INV);
     hostStrID.append((UChar)0);
     hostStrID.truncate(hostStrID.length()-1);
     default_zone = 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 (default_zone != NULL && rawOffset != default_zone->getRawOffset()
         && (3 <= hostIDLen && hostIDLen <= 4))
     {
         // Uh oh. This probably wasn't a good id.
         // It was probably an ambiguous abbreviation
         delete default_zone;
         default_zone = NULL;
     }
     // Construct a fixed standard zone with the host's ID
     // and raw offset.
     if (default_zone == NULL) {
         default_zone = new SimpleTimeZone(rawOffset, hostStrID);
     }
     // If we _still_ don't have a time zone, use GMT.
     if (default_zone == NULL) {
         const TimeZone* temptz = TimeZone::getGMT();
         // If we can't use GMT, get out.
         if (temptz == NULL) {
             return;
         }
         default_zone = temptz->clone();
     }
     // The only way for DEFAULT_ZONE to be non-null at this point is if the user
     // made a thread-unsafe call to setDefault() or adoptDefault() in another
     // thread while this thread was doing something that required getting the default.
     U_ASSERT(DEFAULT_ZONE == NULL);
     DEFAULT_ZONE = default_zone;
 }
 // -------------------------------------
 TimeZone* U_EXPORT2
 TimeZone::createDefault()
 {
     umtx_initOnce(gDefaultZoneInitOnce, initDefault);
     return (DEFAULT_ZONE != NULL) ? DEFAULT_ZONE->clone() : NULL;
 }
 // -------------------------------------
 void U_EXPORT2
 TimeZone::adoptDefault(TimeZone* zone)
 {
     if (zone != NULL)
     {
         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 == NULL) {
             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 UChar *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 == NULL) {
                     // 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 == NULL);
                     MAP_SYSTEM_ZONES = m;
                     LEN_SYSTEM_ZONES = numEntries;
                     break;
                 case UCAL_ZONE_TYPE_CANONICAL:
                     U_ASSERT(MAP_CANONICAL_SYSTEM_ZONES == NULL);
                     MAP_CANONICAL_SYSTEM_ZONES = m;
                     LEN_CANONICAL_SYSTEM_ZONES = numEntries;
                     break;
                 case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
                     U_ASSERT(MAP_CANONICAL_SYSTEM_LOCATION_ZONES == NULL);
                     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;
         double day = uprv_floor(date / U_MILLIS_PER_DAY);
         int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
         Grego::dayToFields(day, year, month, dom, dow);
         dstOffset = getOffset(GregorianCalendar::AD, year, month, dom,
                               (uint8_t) dow, millis,
                               Grego::monthLength(year, month),
                               ec) - rawOffset;
         // Recompute if local==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==NULL
     // 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 : NULL;
         len = mapLen;
     }
     UBool getID(int32_t i) {
         UErrorCode ec = U_ZERO_ERROR;
         int32_t idLen = 0;
         const UChar* id = NULL;
         UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
         top = ures_getByKey(top, kNAMES, top, &ec); // dereference Zones section
         id = ures_getStringByIndex(top, i, &idLen, &ec);
         if(U_FAILURE(ec)) {
             unistr.truncate(0);
         }
         else {
             unistr.fastCopyFrom(UnicodeString(TRUE, id, idLen));
         }
         ures_close(top);
         return U_SUCCESS(ec);
     }
     static int32_t* getMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) {
         len = 0;
         if (U_FAILURE(ec)) {
             return NULL;
         }
         int32_t* m = NULL;
         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 = NULL;
             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 NULL;
         }
         int32_t baseLen;
         int32_t *baseMap = getMap(type, baseLen, ec);
         if (U_FAILURE(ec)) {
             return NULL;
         }
         // If any additional conditions are available,
         // create instance local map filtered by the conditions.
         int32_t *filteredMap = NULL;
         int32_t numEntries = 0;
         if (region != NULL || rawOffset != NULL) {
             int32_t filteredMapSize = DEFAULT_FILTERED_MAP_SIZE;
             filteredMap = (int32_t *)uprv_malloc(filteredMapSize * sizeof(int32_t));
             if (filteredMap == NULL) {
                 ec = U_MEMORY_ALLOCATION_ERROR;
                 return NULL;
             }
             // 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 != NULL) {
                     // 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 != NULL) {
                     // 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 == NULL) {
                         ec = U_MEMORY_ALLOCATION_ERROR;
                         break;
                     } else {
                         filteredMap = tmp;
                     }
                 }
                 filteredMap[numEntries++] = zidx;
             }
             if (U_FAILURE(ec)) {
                 uprv_free(filteredMap);
                 filteredMap = NULL;
             }
             ures_close(res);
         }
         TZEnumeration *result = NULL;
         if (U_SUCCESS(ec)) {
             // Finally, create a new enumeration instance
             if (filteredMap == NULL) {
                 result = new TZEnumeration(baseMap, baseLen, FALSE);
             } else {
                 result = new TZEnumeration(filteredMap, numEntries, TRUE);
                 filteredMap = NULL;
             }
             if (result == NULL) {
                 ec = U_MEMORY_ALLOCATION_ERROR;
             }
         }
         if (filteredMap != NULL) {
             uprv_free(filteredMap);
         }
         return result;
     }
     TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(NULL), localMap(NULL), len(0), pos(0) {
         if (other.localMap != NULL) {
             localMap = (int32_t *)uprv_malloc(other.len * sizeof(int32_t));
             if (localMap != NULL) {
                 len = other.len;
                 uprv_memcpy(localMap, other.localMap, len * sizeof(int32_t));
                 pos = other.pos;
                 map = localMap;
             } else {
                 len = 0;
                 pos = 0;
                 map = NULL;
             }
         } else {
             map = other.map;
             localMap = NULL;
             len = other.len;
             pos = other.pos;
         }
     }
     virtual ~TZEnumeration();
     virtual StringEnumeration *clone() const {
         return new TZEnumeration(*this);
     }
     virtual int32_t count(UErrorCode& status) const {
         return U_FAILURE(status) ? 0 : len;
     }
     virtual const UnicodeString* snext(UErrorCode& status) {
         if (U_SUCCESS(status) && map != NULL && pos < len) {
             getID(map[pos]);
             ++pos;
             return &unistr;
         }
         return 0;
     }
     virtual void reset(UErrorCode& /*status*/) {
         pos = 0;
     }
 public:
     static UClassID U_EXPORT2 getStaticClassID(void);
     virtual UClassID getDynamicClassID(void) const;
 };
 TZEnumeration::~TZEnumeration() {
     if (localMap != NULL) {
         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 ec = U_ZERO_ERROR;
     return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, NULL, ec);
 }
 StringEnumeration* U_EXPORT2
 TimeZone::createEnumeration(int32_t rawOffset) {
     UErrorCode ec = U_ZERO_ERROR;
     return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, &rawOffset, ec);
 }
 StringEnumeration* U_EXPORT2
 TimeZone::createEnumeration(const char* country) {
     UErrorCode ec = U_ZERO_ERROR;
     return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, country, NULL, ec);
 }
 // ---------------------------------------
 int32_t U_EXPORT2
 TimeZone::countEquivalentIDs(const UnicodeString& id) {
     int32_t result = 0;
     UErrorCode ec = U_ZERO_ERROR;
     UResourceBundle res;
     ures_initStackObject(&res);
     U_DEBUG_TZ_MSG(("countEquivalentIDs..\n"));
     UResourceBundle *top = openOlsonResource(id, res, ec);
     if (U_SUCCESS(ec)) {
         UResourceBundle r;
         ures_initStackObject(&r);
         ures_getByKey(&res, kLINKS, &r, &ec);
         ures_getIntVector(&r, &result, &ec);
         ures_close(&r);
     }
     ures_close(&res);
     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;
     UResourceBundle res;
     ures_initStackObject(&res);
     UResourceBundle *top = openOlsonResource(id, res, ec);
     int32_t zone = -1;
     if (U_SUCCESS(ec)) {
         UResourceBundle r;
         ures_initStackObject(&r);
         int32_t size;
         ures_getByKey(&res, kLINKS, &r, &ec);
         const int32_t* v = ures_getIntVector(&r, &size, &ec);
         if (U_SUCCESS(ec)) {
             if (index >= 0 && index < size) {
                 zone = v[index];
             }
         }
         ures_close(&r);
     }
     ures_close(&res);
     if (zone >= 0) {
         UResourceBundle *ares = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Zones section
         if (U_SUCCESS(ec)) {
             int32_t idLen = 0;
             const UChar* id = ures_getStringByIndex(ares, zone, &idLen, &ec);
             result.fastCopyFrom(UnicodeString(TRUE, id, idLen));
             U_DEBUG_TZ_MSG(("gei(%d) -> %d, len%d, %s\n", index, zone, result.length(), u_errorName(ec)));
         }
         ures_close(ares);
     }
     ures_close(top);
 #if defined(U_DEBUG_TZ)
     if(result.length() ==0) {
       U_DEBUG_TZ_MSG(("equiv [__, #%d] -> 0 (%s)\n", index, u_errorName(ec)));
     }
 #endif
     return result;
 }
 // ---------------------------------------
 // These methods are used by ZoneMeta class only.
 const UChar*
 TimeZone::findID(const UnicodeString& id) {
     const UChar *result = NULL;
     UErrorCode ec = U_ZERO_ERROR;
     UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
     // resolve zone index by name
     UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
     int32_t idx = findInStringArray(names, id, ec);
     result = ures_getStringByIndex(names, idx, NULL, &ec);
     if (U_FAILURE(ec)) {
         result = NULL;
     }
     ures_close(names);
     ures_close(rb);
     return result;
 }
 const UChar*
 TimeZone::dereferOlsonLink(const UnicodeString& id) {
     const UChar *result = NULL;
     UErrorCode ec = U_ZERO_ERROR;
     UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
     // resolve zone index by name
     UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
     int32_t idx = findInStringArray(names, id, ec);
     result = ures_getStringByIndex(names, idx, NULL, &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 UChar* tmp = ures_getStringByIndex(names, deref, NULL, &ec);
             if (U_SUCCESS(ec)) {
                 result = tmp;
             }
         }
     }
     ures_close(names);
     ures_close(rb);
     return result;
 }
 const UChar*
 TimeZone::getRegion(const UnicodeString& id) {
     UErrorCode status = U_ZERO_ERROR;
     return getRegion(id, status);
 }
 const UChar*
 TimeZone::getRegion(const UnicodeString& id, UErrorCode& status) {
     if (U_FAILURE(status)) {
         return NULL;
     }
     const UChar *result = NULL;
     UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &status);
     // resolve zone index by name
     UResourceBundle *res = ures_getByKey(rb, kNAMES, NULL, &status);
     int32_t idx = findInStringArray(res, id, status);
     // get region mapping
     ures_getByKey(rb, kREGIONS, res, &status);
     const UChar *tmp = ures_getStringByIndex(res, idx, NULL, &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 UChar *uregion = NULL;
     // "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 == NULL) {
         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 daylight, EDisplayType style, UnicodeString& result)  const
 {
     return getDisplayName(daylight,style, Locale::getDefault(), result);
 }
 //--------------------------------------
 int32_t
 TimeZone::getDSTSavings()const {
     if (useDaylightTime()) {
         return 3600000;
     }
     return 0;
 }
 //---------------------------------------
 UnicodeString&
 TimeZone::getDisplayName(UBool daylight, EDisplayType style, const Locale& locale, UnicodeString& result) const
 {
     UErrorCode status = U_ZERO_ERROR;
     UDate date = Calendar::getNow();
     UTimeZoneFormatTimeType timeType;
     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:
             U_ASSERT(FALSE);
         }
         // 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 ((daylight && timeType == UTZFMT_TIME_TYPE_STANDARD) || (!daylight && timeType == UTZFMT_TIME_TYPE_DAYLIGHT)) {
             offset = daylight ? 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 = daylight && 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:
             U_ASSERT(FALSE);
         }
     } else {
         U_ASSERT(style == LONG || style == SHORT || style == SHORT_COMMONLY_USED);
         UTimeZoneNameType nameType = UTZNM_UNKNOWN;
         switch (style) {
         case LONG:
             nameType = daylight ? UTZNM_LONG_DAYLIGHT : UTZNM_LONG_STANDARD;
             break;
         case SHORT:
         case SHORT_COMMONLY_USED:
             nameType = daylight ? UTZNM_SHORT_DAYLIGHT : UTZNM_SHORT_STANDARD;
             break;
         default:
             U_ASSERT(FALSE);
         }
         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 = daylight && 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 NULL;
 }
 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);
     }
     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 += (UChar)MINUS;
         } else {
             id += (UChar)PLUS;
         }
         if (hour < 10) {
             id += (UChar)ZERO_DIGIT;
         } else {
             id += (UChar)(ZERO_DIGIT + hour/10);
         }
         id += (UChar)(ZERO_DIGIT + hour%10);
         id += (UChar)COLON;
         if (min < 10) {
             id += (UChar)ZERO_DIGIT;
         } else {
             id += (UChar)(ZERO_DIGIT + min/10);
         }
         id += (UChar)(ZERO_DIGIT + min%10);
         if (sec) {
             id += (UChar)COLON;
             if (sec < 10) {
                 id += (UChar)ZERO_DIGIT;
             } else {
                 id += (UChar)(ZERO_DIGIT + sec/10);
             }
             id += (UChar)(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;
     UResourceBundle *bundle = ures_openDirect(NULL, kZONEINFO, &status);
     const UChar *tzver = ures_getStringByKey(bundle, 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);
     }
     ures_close(bundle);
 }
 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;
 }
 #ifndef U_HIDE_DRAFT_API
 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
         return winid;
     }
     UResourceBundle *mapTimezones = ures_openDirect(NULL, "windowsZones", &status);
     ures_getByKey(mapTimezones, "mapTimezones", mapTimezones, &status);
     if (U_FAILURE(status)) {
         return winid;
     }
     UResourceBundle *winzone = NULL;
     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 = NULL;
         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 UChar *tzids = ures_getString(regionalData, &len, &status);
             if (U_FAILURE(status)) {
                 break;
             }
             const UChar *start = tzids;
             UBool hasNext = TRUE;
             while (hasNext) {
                 const UChar *end = u_strchr(start, (UChar)0x20);
                 if (end == NULL) {
                     end = tzids + len;
                     hasNext = FALSE;
                 }
                 if (canonicalID.compare(start, 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(NULL, "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 avaiable by design
     if (U_FAILURE(tmperr)) {
         ures_close(zones);
         return id;
     }
     const UChar *tzid = NULL;
     int32_t len = 0;
     UBool gotID = FALSE;
     if (region) {
         const UChar *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 defasult one
             const UChar *end = u_strchr(tzids, (UChar)0x20);
             if (end == NULL) {
                 id.setTo(tzids, -1);
             } else {
                 id.setTo(tzids, 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;
 }
 #endif /* U_HIDE_DRAFT_API */
 U_NAMESPACE_END
 #endif /* #if !UCONFIG_NO_FORMATTING */
 //eof

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intl/icu/source/i18n/timezone.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/timezone.cpp