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

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

intl/icu/source/i18n/zonemeta.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) 2007-2013, International Business Machines Corporation and
 * others. All Rights Reserved.
 *******************************************************************************
 */
 #include "unicode/utypes.h"
 #if !UCONFIG_NO_FORMATTING
 #include "zonemeta.h"
 #include "unicode/timezone.h"
 #include "unicode/ustring.h"
 #include "unicode/putil.h"
 #include "unicode/simpletz.h"
 #include "umutex.h"
 #include "uvector.h"
 #include "cmemory.h"
 #include "gregoimp.h"
 #include "cstring.h"
 #include "ucln_in.h"
 #include "uassert.h"
 #include "uresimp.h"
 #include "uhash.h"
 #include "olsontz.h"
 static UMutex gZoneMetaLock = U_MUTEX_INITIALIZER;
 // CLDR Canonical ID mapping table
 static UHashtable *gCanonicalIDCache = NULL;
 static icu::UInitOnce gCanonicalIDCacheInitOnce = U_INITONCE_INITIALIZER;
 // Metazone mapping table
 static UHashtable *gOlsonToMeta = NULL;
 static icu::UInitOnce gOlsonToMetaInitOnce = U_INITONCE_INITIALIZER;
 // Available metazone IDs vector and table
 static icu::UVector *gMetaZoneIDs = NULL;
 static UHashtable *gMetaZoneIDTable = NULL;
 static icu::UInitOnce gMetaZoneIDsInitOnce = U_INITONCE_INITIALIZER;
 // Country info vectors
 static icu::UVector *gSingleZoneCountries = NULL;
 static icu::UVector *gMultiZonesCountries = NULL;
 static icu::UInitOnce gCountryInfoVectorsInitOnce = U_INITONCE_INITIALIZER;
 U_CDECL_BEGIN
 /**
  * Cleanup callback func
  */
 static UBool U_CALLCONV zoneMeta_cleanup(void)
 {
     if (gCanonicalIDCache != NULL) {
         uhash_close(gCanonicalIDCache);
         gCanonicalIDCache = NULL;
     }
     gCanonicalIDCacheInitOnce.reset();
     if (gOlsonToMeta != NULL) {
         uhash_close(gOlsonToMeta);
         gOlsonToMeta = NULL;
     }
     gOlsonToMetaInitOnce.reset();
     if (gMetaZoneIDTable != NULL) {
         uhash_close(gMetaZoneIDTable);
         gMetaZoneIDTable = NULL;
     }
     // delete after closing gMetaZoneIDTable, because it holds
     // value objects held by the hashtable
     delete gMetaZoneIDs;
     gMetaZoneIDs = NULL;
     gMetaZoneIDsInitOnce.reset();
     delete gSingleZoneCountries;
     gSingleZoneCountries = NULL;
     delete gMultiZonesCountries;
     gMultiZonesCountries = NULL;
     gCountryInfoVectorsInitOnce.reset();
     return TRUE;
 }
 /**
  * Deleter for UChar* string
  */
 static void U_CALLCONV
 deleteUCharString(void *obj) {
     UChar *entry = (UChar*)obj;
     uprv_free(entry);
 }
 /**
  * Deleter for UVector
  */
 static void U_CALLCONV
 deleteUVector(void *obj) {
    delete (icu::UVector*) obj;
 }
 /**
  * Deleter for OlsonToMetaMappingEntry
  */
 static void U_CALLCONV
 deleteOlsonToMetaMappingEntry(void *obj) {
     icu::OlsonToMetaMappingEntry *entry = (icu::OlsonToMetaMappingEntry*)obj;
     uprv_free(entry);
 }
 U_CDECL_END
 U_NAMESPACE_BEGIN
 #define ZID_KEY_MAX 128
 static const char gMetaZones[]          = "metaZones";
 static const char gMetazoneInfo[]       = "metazoneInfo";
 static const char gMapTimezonesTag[]    = "mapTimezones";
 static const char gKeyTypeData[]        = "keyTypeData";
 static const char gTypeAliasTag[]       = "typeAlias";
 static const char gTypeMapTag[]         = "typeMap";
 static const char gTimezoneTag[]        = "timezone";
 static const char gPrimaryZonesTag[]    = "primaryZones";
 static const char gWorldTag[]           = "001";
 static const UChar gWorld[] = {0x30, 0x30, 0x31, 0x00}; // "001"
 static const UChar gDefaultFrom[] = {0x31, 0x39, 0x37, 0x30, 0x2D, 0x30, 0x31, 0x2D, 0x30, 0x31,
 x20, 0x30, 0x30, 0x3A, 0x30, 0x30, 0x00}; // "1970-01-01 00:00"
 static const UChar gDefaultTo[]   = {0x39, 0x39, 0x39, 0x39, 0x2D, 0x31, 0x32, 0x2D, 0x33, 0x31,
 x20, 0x32, 0x33, 0x3A, 0x35, 0x39, 0x00}; // "9999-12-31 23:59"
 static const UChar gCustomTzPrefix[]    = {0x47, 0x4D, 0x54, 0};    // "GMT"
 #define ASCII_DIGIT(c) (((c)>=0x30 && (c)<=0x39) ? (c)-0x30 : -1)
 /*
  * Convert a date string used by metazone mappings to UDate.
  * The format used by CLDR metazone mapping is "yyyy-MM-dd HH:mm".
  */
 static UDate
 parseDate (const UChar *text, UErrorCode &status) {
     if (U_FAILURE(status)) {
         return 0;
     }
     int32_t len = u_strlen(text);
     if (len != 16 && len != 10) {
         // It must be yyyy-MM-dd HH:mm (length 16) or yyyy-MM-dd (length 10)
         status = U_INVALID_FORMAT_ERROR;
         return 0;
     }
     int32_t year = 0, month = 0, day = 0, hour = 0, min = 0, n;
     int32_t idx;
     // "yyyy" (0 - 3)
     for (idx = 0; idx <= 3 && U_SUCCESS(status); idx++) {
         n = ASCII_DIGIT((int32_t)text[idx]);
         if (n >= 0) {
             year = 10*year + n;
         } else {
             status = U_INVALID_FORMAT_ERROR;
         }
     }
     // "MM" (5 - 6)
     for (idx = 5; idx <= 6 && U_SUCCESS(status); idx++) {
         n = ASCII_DIGIT((int32_t)text[idx]);
         if (n >= 0) {
             month = 10*month + n;
         } else {
             status = U_INVALID_FORMAT_ERROR;
         }
     }
     // "dd" (8 - 9)
     for (idx = 8; idx <= 9 && U_SUCCESS(status); idx++) {
         n = ASCII_DIGIT((int32_t)text[idx]);
         if (n >= 0) {
             day = 10*day + n;
         } else {
             status = U_INVALID_FORMAT_ERROR;
         }
     }
     if (len == 16) {
         // "HH" (11 - 12)
         for (idx = 11; idx <= 12 && U_SUCCESS(status); idx++) {
             n = ASCII_DIGIT((int32_t)text[idx]);
             if (n >= 0) {
                 hour = 10*hour + n;
             } else {
                 status = U_INVALID_FORMAT_ERROR;
             }
         }
         // "mm" (14 - 15)
         for (idx = 14; idx <= 15 && U_SUCCESS(status); idx++) {
             n = ASCII_DIGIT((int32_t)text[idx]);
             if (n >= 0) {
                 min = 10*min + n;
             } else {
                 status = U_INVALID_FORMAT_ERROR;
             }
         }
     }
     if (U_SUCCESS(status)) {
         UDate date = Grego::fieldsToDay(year, month - 1, day) * U_MILLIS_PER_DAY
             + hour * U_MILLIS_PER_HOUR + min * U_MILLIS_PER_MINUTE;
         return date;
     }
     return 0;
 }
 static void U_CALLCONV initCanonicalIDCache(UErrorCode &status) {
     gCanonicalIDCache = uhash_open(uhash_hashUChars, uhash_compareUChars, NULL, &status);
     if (gCanonicalIDCache == NULL) {
         status = U_MEMORY_ALLOCATION_ERROR;
     }
     if (U_FAILURE(status)) {
         gCanonicalIDCache = NULL;
     }
     // No key/value deleters - keys/values are from a resource bundle
     ucln_i18n_registerCleanup(UCLN_I18N_ZONEMETA, zoneMeta_cleanup);
 }
 const UChar* U_EXPORT2
 ZoneMeta::getCanonicalCLDRID(const UnicodeString &tzid, UErrorCode& status) {
     if (U_FAILURE(status)) {
         return NULL;
     }
     int32_t len = tzid.length();
     if (len > ZID_KEY_MAX) {
         status = U_ILLEGAL_ARGUMENT_ERROR;
         return NULL;
     }
     // Checking the cached results
     umtx_initOnce(gCanonicalIDCacheInitOnce, &initCanonicalIDCache, status);
     if (U_FAILURE(status)) {
         return NULL;
     }
     const UChar *canonicalID = NULL;
     UErrorCode tmpStatus = U_ZERO_ERROR;
     UChar utzid[ZID_KEY_MAX + 1];
     tzid.extract(utzid, ZID_KEY_MAX + 1, tmpStatus);
     U_ASSERT(tmpStatus == U_ZERO_ERROR);    // we checked the length of tzid already
     // Check if it was already cached
     umtx_lock(&gZoneMetaLock);
     {
         canonicalID = (const UChar *)uhash_get(gCanonicalIDCache, utzid);
     }
     umtx_unlock(&gZoneMetaLock);
     if (canonicalID != NULL) {
         return canonicalID;
     }
     // If not, resolve CLDR canonical ID with resource data
     UBool isInputCanonical = FALSE;
     char id[ZID_KEY_MAX + 1];
     const UChar* idChars = tzid.getBuffer();
     u_UCharsToChars(idChars,id,len);
     id[len] = (char) 0; // Make sure it is null terminated.
     // replace '/' with ':'
     char *p = id;
     while (*p++) {
         if (*p == '/') {
             *p = ':';
         }
     }
     UResourceBundle *top = ures_openDirect(NULL, gKeyTypeData, &tmpStatus);
     UResourceBundle *rb = ures_getByKey(top, gTypeMapTag, NULL, &tmpStatus);
     ures_getByKey(rb, gTimezoneTag, rb, &tmpStatus);
     ures_getByKey(rb, id, rb, &tmpStatus);
     if (U_SUCCESS(tmpStatus)) {
         // type entry (canonical) found
         // the input is the canonical ID. resolve to const UChar*
         canonicalID = TimeZone::findID(tzid);
         isInputCanonical = TRUE;
     }
     if (canonicalID == NULL) {
         // If a map element not found, then look for an alias
         tmpStatus = U_ZERO_ERROR;
         ures_getByKey(top, gTypeAliasTag, rb, &tmpStatus);
         ures_getByKey(rb, gTimezoneTag, rb, &tmpStatus);
         const UChar *canonical = ures_getStringByKey(rb,id,NULL,&tmpStatus);
         if (U_SUCCESS(tmpStatus)) {
             // canonical map found
             canonicalID = canonical;
         }
         if (canonicalID == NULL) {
             // Dereference the input ID using the tz data
             const UChar *derefer = TimeZone::dereferOlsonLink(tzid);
             if (derefer == NULL) {
                 status = U_ILLEGAL_ARGUMENT_ERROR;
             } else {
                 len = u_strlen(derefer);
                 u_UCharsToChars(derefer,id,len);
                 id[len] = (char) 0; // Make sure it is null terminated.
                 // replace '/' with ':'
                 char *p = id;
                 while (*p++) {
                     if (*p == '/') {
                         *p = ':';
                     }
                 }
                 // If a dereference turned something up then look for an alias.
                 // rb still points to the alias table, so we don't have to go looking
                 // for it.
                 tmpStatus = U_ZERO_ERROR;
                 canonical = ures_getStringByKey(rb,id,NULL,&tmpStatus);
                 if (U_SUCCESS(tmpStatus)) {
                     // canonical map for the dereferenced ID found
                     canonicalID = canonical;
                 } else {
                     canonicalID = derefer;
                     isInputCanonical = TRUE;
                 }
             }
         }
     }
     ures_close(rb);
     ures_close(top);
     if (U_SUCCESS(status)) {
         U_ASSERT(canonicalID != NULL);  // canocanilD must be non-NULL here
         // Put the resolved canonical ID to the cache
         umtx_lock(&gZoneMetaLock);
         {
             const UChar* idInCache = (const UChar *)uhash_get(gCanonicalIDCache, utzid);
             if (idInCache == NULL) {
                 const UChar* key = ZoneMeta::findTimeZoneID(tzid);
                 U_ASSERT(key != NULL);
                 if (key != NULL) {
                     idInCache = (const UChar *)uhash_put(gCanonicalIDCache, (void *)key, (void *)canonicalID, &status);
                     U_ASSERT(idInCache == NULL);
                 }
             }
             if (U_SUCCESS(status) && isInputCanonical) {
                 // Also put canonical ID itself into the cache if not exist
                 const UChar *canonicalInCache = (const UChar*)uhash_get(gCanonicalIDCache, canonicalID);
                 if (canonicalInCache == NULL) {
                     canonicalInCache = (const UChar *)uhash_put(gCanonicalIDCache, (void *)canonicalID, (void *)canonicalID, &status);
                     U_ASSERT(canonicalInCache == NULL);
                 }
             }
         }
         umtx_unlock(&gZoneMetaLock);
     }
     return canonicalID;
 }
 UnicodeString& U_EXPORT2
 ZoneMeta::getCanonicalCLDRID(const UnicodeString &tzid, UnicodeString &systemID, UErrorCode& status) {
     const UChar *canonicalID = getCanonicalCLDRID(tzid, status);
     if (U_FAILURE(status) || canonicalID == NULL) {
         systemID.setToBogus();
         return systemID;
     }
     systemID.setTo(TRUE, canonicalID, -1);
     return systemID;
 }
 const UChar* U_EXPORT2
 ZoneMeta::getCanonicalCLDRID(const TimeZone& tz) {
     if (dynamic_cast<const OlsonTimeZone *>(&tz) != NULL) {
         // short cut for OlsonTimeZone
         const OlsonTimeZone *otz = (const OlsonTimeZone*)&tz;
         return otz->getCanonicalID();
     }
     UErrorCode status = U_ZERO_ERROR;
     UnicodeString tzID;
     return getCanonicalCLDRID(tz.getID(tzID), status);
 }
 static void U_CALLCONV countryInfoVectorsInit(UErrorCode &status) {
     // Create empty vectors
     // No deleters for these UVectors, it's a reference to a resource bundle string.
     gSingleZoneCountries = new UVector(NULL, uhash_compareUChars, status);
     if (gSingleZoneCountries == NULL) {
         status = U_MEMORY_ALLOCATION_ERROR;
     }
     gMultiZonesCountries = new UVector(NULL, uhash_compareUChars, status);
     if (gMultiZonesCountries == NULL) {
         status = U_MEMORY_ALLOCATION_ERROR;
     }
     if (U_FAILURE(status)) {
         delete gSingleZoneCountries;
         delete gMultiZonesCountries;
         gSingleZoneCountries = NULL;
         gMultiZonesCountries  = NULL;
     }
     ucln_i18n_registerCleanup(UCLN_I18N_ZONEMETA, zoneMeta_cleanup);
 }
 UnicodeString& U_EXPORT2
 ZoneMeta::getCanonicalCountry(const UnicodeString &tzid, UnicodeString &country, UBool *isPrimary /* = NULL */) {
     if (isPrimary != NULL) {
         *isPrimary = FALSE;
     }
     const UChar *region = TimeZone::getRegion(tzid);
     if (region != NULL && u_strcmp(gWorld, region) != 0) {
         country.setTo(region, -1);
     } else {
         country.setToBogus();
         return country;
     }
     if (isPrimary != NULL) {
         char regionBuf[] = {0, 0, 0};
         // Checking the cached results
         UErrorCode status = U_ZERO_ERROR;
         umtx_initOnce(gCountryInfoVectorsInitOnce, &countryInfoVectorsInit, status);
         if (U_FAILURE(status)) {
             return country;
         }
         // Check if it was already cached
         UBool cached = FALSE;
         UBool singleZone = FALSE;
         umtx_lock(&gZoneMetaLock);
         {
             singleZone = cached = gSingleZoneCountries->contains((void*)region);
             if (!cached) {
                 cached = gMultiZonesCountries->contains((void*)region);
             }
         }
         umtx_unlock(&gZoneMetaLock);
         if (!cached) {
             // We need to go through all zones associated with the region.
             // This is relatively heavy operation.
             U_ASSERT(u_strlen(region) == 2);
             u_UCharsToChars(region, regionBuf, 2);
             StringEnumeration *ids = TimeZone::createTimeZoneIDEnumeration(UCAL_ZONE_TYPE_CANONICAL_LOCATION, regionBuf, NULL, status);
             int32_t idsLen = ids->count(status);
             if (U_SUCCESS(status) && idsLen == 1) {
                 // only the single zone is available for the region
                 singleZone = TRUE;
             }
             delete ids;
             // Cache the result
             umtx_lock(&gZoneMetaLock);
             {
                 UErrorCode ec = U_ZERO_ERROR;
                 if (singleZone) {
                     if (!gSingleZoneCountries->contains((void*)region)) {
                         gSingleZoneCountries->addElement((void*)region, ec);
                     }
                 } else {
                     if (!gMultiZonesCountries->contains((void*)region)) {
                         gMultiZonesCountries->addElement((void*)region, ec);
                     }
                 }
             }
             umtx_unlock(&gZoneMetaLock);
         }
         if (singleZone) {
             *isPrimary = TRUE;
         } else {
             // Note: We may cache the primary zone map in future.
             // Even a country has multiple zones, one of them might be
             // dominant and treated as a primary zone
             int32_t idLen = 0;
             if (regionBuf[0] == 0) {
                 u_UCharsToChars(region, regionBuf, 2);
             }
             UResourceBundle *rb = ures_openDirect(NULL, gMetaZones, &status);
             ures_getByKey(rb, gPrimaryZonesTag, rb, &status);
             const UChar *primaryZone = ures_getStringByKey(rb, regionBuf, &idLen, &status);
             if (U_SUCCESS(status)) {
                 if (tzid.compare(primaryZone, idLen) == 0) {
                     *isPrimary = TRUE;
                 } else {
                     // The given ID might not be a canonical ID
                     UnicodeString canonicalID;
                     TimeZone::getCanonicalID(tzid, canonicalID, status);
                     if (U_SUCCESS(status) && canonicalID.compare(primaryZone, idLen) == 0) {
                         *isPrimary = TRUE;
                     }
                 }
             }
             ures_close(rb);
         }
     }
     return country;
 }
 UnicodeString& U_EXPORT2
 ZoneMeta::getMetazoneID(const UnicodeString &tzid, UDate date, UnicodeString &result) {
     UBool isSet = FALSE;
     const UVector *mappings = getMetazoneMappings(tzid);
     if (mappings != NULL) {
         for (int32_t i = 0; i < mappings->size(); i++) {
             OlsonToMetaMappingEntry *mzm = (OlsonToMetaMappingEntry*)mappings->elementAt(i);
             if (mzm->from <= date && mzm->to > date) {
                 result.setTo(mzm->mzid, -1);
                 isSet = TRUE;
                 break;
             }
         }
     }
     if (!isSet) {
         result.setToBogus();
     }
     return result;
 }
 static void U_CALLCONV olsonToMetaInit(UErrorCode &status) {
     U_ASSERT(gOlsonToMeta == NULL);
     ucln_i18n_registerCleanup(UCLN_I18N_ZONEMETA, zoneMeta_cleanup);
     gOlsonToMeta = uhash_open(uhash_hashUChars, uhash_compareUChars, NULL, &status);
     if (U_FAILURE(status)) {
         gOlsonToMeta = NULL;
     } else {
         uhash_setKeyDeleter(gOlsonToMeta, deleteUCharString);
         uhash_setValueDeleter(gOlsonToMeta, deleteUVector);
     }
 }
 const UVector* U_EXPORT2
 ZoneMeta::getMetazoneMappings(const UnicodeString &tzid) {
     UErrorCode status = U_ZERO_ERROR;
     UChar tzidUChars[ZID_KEY_MAX + 1];
     tzid.extract(tzidUChars, ZID_KEY_MAX + 1, status);
     if (U_FAILURE(status) || status == U_STRING_NOT_TERMINATED_WARNING) {
         return NULL;
     }
     umtx_initOnce(gOlsonToMetaInitOnce, &olsonToMetaInit, status);
     if (U_FAILURE(status)) {
         return NULL;
     }
     // get the mapping from cache
     const UVector *result = NULL;
     umtx_lock(&gZoneMetaLock);
     {
         result = (UVector*) uhash_get(gOlsonToMeta, tzidUChars);
     }
     umtx_unlock(&gZoneMetaLock);
     if (result != NULL) {
         return result;
     }
     // miss the cache - create new one
     UVector *tmpResult = createMetazoneMappings(tzid);
     if (tmpResult == NULL) {
         // not available
         return NULL;
     }
     // put the new one into the cache
     umtx_lock(&gZoneMetaLock);
     {
         // make sure it's already created
         result = (UVector*) uhash_get(gOlsonToMeta, tzidUChars);
         if (result == NULL) {
             // add the one just created
             int32_t tzidLen = tzid.length() + 1;
             UChar *key = (UChar*)uprv_malloc(tzidLen * sizeof(UChar));
             if (key == NULL) {
                 // memory allocation error..  just return NULL
                 result = NULL;
                 delete tmpResult;
             } else {
                 tzid.extract(key, tzidLen, status);
                 uhash_put(gOlsonToMeta, key, tmpResult, &status);
                 if (U_FAILURE(status)) {
                     // delete the mapping
                     result = NULL;
                     delete tmpResult;
                 } else {
                     result = tmpResult;
                 }
             }
         } else {
             // another thread already put the one
             delete tmpResult;
         }
     }
     umtx_unlock(&gZoneMetaLock);
     return result;
 }
 UVector*
 ZoneMeta::createMetazoneMappings(const UnicodeString &tzid) {
     UVector *mzMappings = NULL;
     UErrorCode status = U_ZERO_ERROR;
     UnicodeString canonicalID;
     UResourceBundle *rb = ures_openDirect(NULL, gMetaZones, &status);
     ures_getByKey(rb, gMetazoneInfo, rb, &status);
     getCanonicalCLDRID(tzid, canonicalID, status);
     if (U_SUCCESS(status)) {
         char tzKey[ZID_KEY_MAX + 1];
         int32_t tzKeyLen = canonicalID.extract(0, canonicalID.length(), tzKey, sizeof(tzKey), US_INV);
         tzKey[tzKeyLen] = 0;
         // tzid keys are using ':' as separators
         char *p = tzKey;
         while (*p) {
             if (*p == '/') {
                 *p = ':';
             }
             p++;
         }
         ures_getByKey(rb, tzKey, rb, &status);
         if (U_SUCCESS(status)) {
             UResourceBundle *mz = NULL;
             while (ures_hasNext(rb)) {
                 mz = ures_getNextResource(rb, mz, &status);
                 const UChar *mz_name = ures_getStringByIndex(mz, 0, NULL, &status);
                 const UChar *mz_from = gDefaultFrom;
                 const UChar *mz_to = gDefaultTo;
                 if (ures_getSize(mz) == 3) {
                     mz_from = ures_getStringByIndex(mz, 1, NULL, &status);
                     mz_to   = ures_getStringByIndex(mz, 2, NULL, &status);
                 }
                 if(U_FAILURE(status)){
                     status = U_ZERO_ERROR;
                     continue;
                 }
                 // We do not want to use SimpleDateformat to parse boundary dates,
                 // because this code could be triggered by the initialization code
                 // used by SimpleDateFormat.
                 UDate from = parseDate(mz_from, status);
                 UDate to = parseDate(mz_to, status);
                 if (U_FAILURE(status)) {
                     status = U_ZERO_ERROR;
                     continue;
                 }
                 OlsonToMetaMappingEntry *entry = (OlsonToMetaMappingEntry*)uprv_malloc(sizeof(OlsonToMetaMappingEntry));
                 if (entry == NULL) {
                     status = U_MEMORY_ALLOCATION_ERROR;
                     break;
                 }
                 entry->mzid = mz_name;
                 entry->from = from;
                 entry->to = to;
                 if (mzMappings == NULL) {
                     mzMappings = new UVector(deleteOlsonToMetaMappingEntry, NULL, status);
                     if (U_FAILURE(status)) {
                         delete mzMappings;
                         deleteOlsonToMetaMappingEntry(entry);
                         uprv_free(entry);
                         break;
                     }
                 }
                 mzMappings->addElement(entry, status);
                 if (U_FAILURE(status)) {
                     break;
                 }
             }
             ures_close(mz);
             if (U_FAILURE(status)) {
                 if (mzMappings != NULL) {
                     delete mzMappings;
                     mzMappings = NULL;
                 }
             }
         }
     }
     ures_close(rb);
     return mzMappings;
 }
 UnicodeString& U_EXPORT2
 ZoneMeta::getZoneIdByMetazone(const UnicodeString &mzid, const UnicodeString &region, UnicodeString &result) {
     UErrorCode status = U_ZERO_ERROR;
     const UChar *tzid = NULL;
     int32_t tzidLen = 0;
     char keyBuf[ZID_KEY_MAX + 1];
     int32_t keyLen = 0;
     if (mzid.length() > ZID_KEY_MAX) {
         result.setToBogus();
         return result;
     }
     keyLen = mzid.extract(0, mzid.length(), keyBuf, ZID_KEY_MAX + 1, US_INV);
     keyBuf[keyLen] = 0;
     UResourceBundle *rb = ures_openDirect(NULL, gMetaZones, &status);
     ures_getByKey(rb, gMapTimezonesTag, rb, &status);
     ures_getByKey(rb, keyBuf, rb, &status);
     if (U_SUCCESS(status)) {
         // check region mapping
         if (region.length() == 2 || region.length() == 3) {
             keyLen = region.extract(0, region.length(), keyBuf, ZID_KEY_MAX + 1, US_INV);
             keyBuf[keyLen] = 0;
             tzid = ures_getStringByKey(rb, keyBuf, &tzidLen, &status);
             if (status == U_MISSING_RESOURCE_ERROR) {
                 status = U_ZERO_ERROR;
             }
         }
         if (U_SUCCESS(status) && tzid == NULL) {
             // try "001"
             tzid = ures_getStringByKey(rb, gWorldTag, &tzidLen, &status);
         }
     }
     ures_close(rb);
     if (tzid == NULL) {
         result.setToBogus();
     } else {
         result.setTo(tzid, tzidLen);
     }
     return result;
 }
 static void U_CALLCONV initAvailableMetaZoneIDs () {
     U_ASSERT(gMetaZoneIDs == NULL);
     U_ASSERT(gMetaZoneIDTable == NULL);
     ucln_i18n_registerCleanup(UCLN_I18N_ZONEMETA, zoneMeta_cleanup);
     UErrorCode status = U_ZERO_ERROR;
     gMetaZoneIDTable = uhash_open(uhash_hashUnicodeString, uhash_compareUnicodeString, NULL, &status);
     if (U_FAILURE(status) || gMetaZoneIDTable == NULL) {
         gMetaZoneIDTable = NULL;
         return;
     }
     uhash_setKeyDeleter(gMetaZoneIDTable, uprv_deleteUObject);
     // No valueDeleter, because the vector maintain the value objects
     gMetaZoneIDs = new UVector(NULL, uhash_compareUChars, status);
     if (U_FAILURE(status) || gMetaZoneIDs == NULL) {
         gMetaZoneIDs = NULL;
         uhash_close(gMetaZoneIDTable);
         gMetaZoneIDTable = NULL;
         return;
     }
     gMetaZoneIDs->setDeleter(uprv_free);
     UResourceBundle *rb = ures_openDirect(NULL, gMetaZones, &status);
     UResourceBundle *bundle = ures_getByKey(rb, gMapTimezonesTag, NULL, &status);
     UResourceBundle res;
     ures_initStackObject(&res);
     while (U_SUCCESS(status) && ures_hasNext(bundle)) {
         ures_getNextResource(bundle, &res, &status);
         if (U_FAILURE(status)) {
             break;
         }
         const char *mzID = ures_getKey(&res);
         int32_t len = uprv_strlen(mzID);
         UChar *uMzID = (UChar*)uprv_malloc(sizeof(UChar) * (len + 1));
         if (uMzID == NULL) {
             status = U_MEMORY_ALLOCATION_ERROR;
             break;
         }
         u_charsToUChars(mzID, uMzID, len);
         uMzID[len] = 0;
         UnicodeString *usMzID = new UnicodeString(uMzID);
         if (uhash_get(gMetaZoneIDTable, usMzID) == NULL) {
             gMetaZoneIDs->addElement((void *)uMzID, status);
             uhash_put(gMetaZoneIDTable, (void *)usMzID, (void *)uMzID, &status);
         } else {
             uprv_free(uMzID);
             delete usMzID;
         }
     }
     ures_close(&res);
     ures_close(bundle);
     ures_close(rb);
     if (U_FAILURE(status)) {
         uhash_close(gMetaZoneIDTable);
         delete gMetaZoneIDs;
         gMetaZoneIDTable = NULL;
         gMetaZoneIDs = NULL;
     }
 }
 const UVector*
 ZoneMeta::getAvailableMetazoneIDs() {
     umtx_initOnce(gMetaZoneIDsInitOnce, &initAvailableMetaZoneIDs);
     return gMetaZoneIDs;
 }
 const UChar*
 ZoneMeta::findMetaZoneID(const UnicodeString& mzid) {
     umtx_initOnce(gMetaZoneIDsInitOnce, &initAvailableMetaZoneIDs);
     if (gMetaZoneIDTable == NULL) {
         return NULL;
     }
     return (const UChar*)uhash_get(gMetaZoneIDTable, &mzid);
 }
 const UChar*
 ZoneMeta::findTimeZoneID(const UnicodeString& tzid) {
     return TimeZone::findID(tzid);
 }
 TimeZone*
 ZoneMeta::createCustomTimeZone(int32_t offset) {
     UBool negative = FALSE;
     int32_t tmp = offset;
     if (offset < 0) {
         negative = TRUE;
         tmp = -offset;
     }
     int32_t hour, min, sec;
     tmp /= 1000;
     sec = tmp % 60;
     tmp /= 60;
     min = tmp % 60;
     hour = tmp / 60;
     UnicodeString zid;
     formatCustomID(hour, min, sec, negative, zid);
     return new SimpleTimeZone(offset, zid);
 }
 UnicodeString&
 ZoneMeta::formatCustomID(uint8_t hour, uint8_t min, uint8_t sec, UBool negative, UnicodeString& id) {
     // Create normalized time zone ID - GMT[+|-]HH:mm[:ss]
     id.setTo(gCustomTzPrefix, -1);
     if (hour != 0 || min != 0) {
         if (negative) {
           id.append((UChar)0x2D);    // '-'
         } else {
           id.append((UChar)0x2B);    // '+'
         }
         // Always use US-ASCII digits
         id.append((UChar)(0x30 + (hour%100)/10));
         id.append((UChar)(0x30 + (hour%10)));
         id.append((UChar)0x3A);    // ':'
         id.append((UChar)(0x30 + (min%100)/10));
         id.append((UChar)(0x30 + (min%10)));
         if (sec != 0) {
           id.append((UChar)0x3A);    // ':'
           id.append((UChar)(0x30 + (sec%100)/10));
           id.append((UChar)(0x30 + (sec%10)));
         }
     }
     return id;
 }
 const UChar*
 ZoneMeta::getShortID(const TimeZone& tz) {
     const UChar* canonicalID = NULL;
     if (dynamic_cast<const OlsonTimeZone *>(&tz) != NULL) {
         // short cut for OlsonTimeZone
         const OlsonTimeZone *otz = (const OlsonTimeZone*)&tz;
         canonicalID = otz->getCanonicalID();
     }
     if (canonicalID == NULL) {
         return NULL;
     }
     return getShortIDFromCanonical(canonicalID);
 }
 const UChar*
 ZoneMeta::getShortID(const UnicodeString& id) {
     UErrorCode status = U_ZERO_ERROR;
     const UChar* canonicalID = ZoneMeta::getCanonicalCLDRID(id, status);
     if (U_FAILURE(status) || canonicalID == NULL) {
         return NULL;
     }
     return ZoneMeta::getShortIDFromCanonical(canonicalID);
 }
 const UChar*
 ZoneMeta::getShortIDFromCanonical(const UChar* canonicalID) {
     const UChar* shortID = NULL;
     int32_t len = u_strlen(canonicalID);
     char tzidKey[ZID_KEY_MAX + 1];
     u_UCharsToChars(canonicalID, tzidKey, len);
     tzidKey[len] = (char) 0; // Make sure it is null terminated.
     // replace '/' with ':'
     char *p = tzidKey;
     while (*p++) {
         if (*p == '/') {
             *p = ':';
         }
     }
     UErrorCode status = U_ZERO_ERROR;
     UResourceBundle *rb = ures_openDirect(NULL, gKeyTypeData, &status);
     ures_getByKey(rb, gTypeMapTag, rb, &status);
     ures_getByKey(rb, gTimezoneTag, rb, &status);
     shortID = ures_getStringByKey(rb, tzidKey, NULL, &status);
     ures_close(rb);
     return shortID;
 }
 U_NAMESPACE_END
 #endif /* #if !UCONFIG_NO_FORMATTING */

The Tor Browser / annotate

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

intl/icu/source/i18n/zonemeta.cpp