icuSources/i18n/tznames_impl.cpp

   1 /*
   2 *******************************************************************************
   3 * Copyright (C) 2011-2013, International Business Machines Corporation and
   4 * others. All Rights Reserved.
   5 *******************************************************************************
   6 *
   7 * File TZNAMES_IMPL.CPP
   8 *
   9 *******************************************************************************
  10 */
  11
  12 #include "unicode/utypes.h"
  13
  14 #if !UCONFIG_NO_FORMATTING
  15
  16 #include "unicode/ustring.h"
  17 #include "unicode/timezone.h"
  18
  19 #include "tznames_impl.h"
  20 #include "cmemory.h"
  21 #include "cstring.h"
  22 #include "uassert.h"
  23 #include "mutex.h"
  24 #include "uresimp.h"
  25 #include "ureslocs.h"
  26 #include "zonemeta.h"
  27 #include "ucln_in.h"
  28 #include "uvector.h"
  29 #include "olsontz.h"
  30
  31
  32 U_NAMESPACE_BEGIN
  33
  34 #define ZID_KEY_MAX  128
  35 #define MZ_PREFIX_LEN 5
  36
  37 static const char gZoneStrings[]        = "zoneStrings";
  38 static const char gMZPrefix[]           = "meta:";
  39
  40 static const char* KEYS[]               = {"lg", "ls", "ld", "sg", "ss", "sd"};
  41 static const int32_t KEYS_SIZE = (sizeof KEYS / sizeof KEYS[0]);
  42
  43 static const char gEcTag[]              = "ec";
  44
  45 static const char EMPTY[]               = "<empty>";   // place holder for empty ZNames/TZNames
  46
  47 static const UTimeZoneNameType ALL_NAME_TYPES[] = {
  48     UTZNM_LONG_GENERIC, UTZNM_LONG_STANDARD, UTZNM_LONG_DAYLIGHT,
  49     UTZNM_SHORT_GENERIC, UTZNM_SHORT_STANDARD, UTZNM_SHORT_DAYLIGHT,
  50     UTZNM_EXEMPLAR_LOCATION,
  51     UTZNM_UNKNOWN // unknown as the last one
  52 };
  53
  54 #define DEFAULT_CHARACTERNODE_CAPACITY 1
  55
  56 // ---------------------------------------------------
  57 // CharacterNode class implementation
  58 // ---------------------------------------------------
  59 void CharacterNode::clear() {
  60     uprv_memset(this, 0, sizeof(*this));
  61 }
  62
  63 void CharacterNode::deleteValues(UObjectDeleter *valueDeleter) {
  64     if (fValues == NULL) {
  65         // Do nothing.
  66     } else if (!fHasValuesVector) {
  67         if (valueDeleter) {
  68             valueDeleter(fValues);
  69         }
  70     } else {
  71         delete (UVector *)fValues;
  72     }
  73 }
  74
  75 void
  76 CharacterNode::addValue(void *value, UObjectDeleter *valueDeleter, UErrorCode &status) {
  77     if (U_FAILURE(status)) {
  78         if (valueDeleter) {
  79             valueDeleter(value);
  80         }
  81         return;
  82     }
  83     if (fValues == NULL) {
  84         fValues = value;
  85     } else {
  86         // At least one value already.
  87         if (!fHasValuesVector) {
  88             // There is only one value so far, and not in a vector yet.
  89             // Create a vector and add the old value.
  90             UVector *values = new UVector(valueDeleter, NULL, DEFAULT_CHARACTERNODE_CAPACITY, status);
  91             if (U_FAILURE(status)) {
  92                 if (valueDeleter) {
  93                     valueDeleter(value);
  94                 }
  95                 return;
  96             }
  97             values->addElement(fValues, status);
  98             fValues = values;
  99             fHasValuesVector = TRUE;
 100         }
 101         // Add the new value.
 102         ((UVector *)fValues)->addElement(value, status);
 103     }
 104 }
 105
 106 // ---------------------------------------------------
 107 // TextTrieMapSearchResultHandler class implementation
 108 // ---------------------------------------------------
 109 TextTrieMapSearchResultHandler::~TextTrieMapSearchResultHandler(){
 110 }
 111
 112 // ---------------------------------------------------
 113 // TextTrieMap class implementation
 114 // ---------------------------------------------------
 115 TextTrieMap::TextTrieMap(UBool ignoreCase, UObjectDeleter *valueDeleter)
 116 : fIgnoreCase(ignoreCase), fNodes(NULL), fNodesCapacity(0), fNodesCount(0),
 117   fLazyContents(NULL), fIsEmpty(TRUE), fValueDeleter(valueDeleter) {
 118 }
 119
 120 TextTrieMap::~TextTrieMap() {
 121     int32_t index;
 122     for (index = 0; index < fNodesCount; ++index) {
 123         fNodes[index].deleteValues(fValueDeleter);
 124     }
 125     uprv_free(fNodes);
 126     if (fLazyContents != NULL) {
 127         for (int32_t i=0; i<fLazyContents->size(); i+=2) {
 128             if (fValueDeleter) {
 129                 fValueDeleter(fLazyContents->elementAt(i+1));
 130             }
 131         }
 132         delete fLazyContents;
 133     }
 134 }
 135
 136 int32_t TextTrieMap::isEmpty() const {
 137     // Use a separate field for fIsEmpty because it will remain unchanged once the
 138     //   Trie is built, while fNodes and fLazyContents change with the lazy init
 139     //   of the nodes structure.  Trying to test the changing fields has
 140     //   thread safety complications.
 141     return fIsEmpty;
 142 }
 143
 144
 145 //  We defer actually building the TextTrieMap node structure until the first time a
 146 //     search is performed.  put() simply saves the parameters in case we do
 147 //     eventually need to build it.
 148 //
 149 void
 150 TextTrieMap::put(const UnicodeString &key, void *value, ZNStringPool &sp, UErrorCode &status) {
 151     const UChar *s = sp.get(key, status);
 152     put(s, value, status);
 153 }
 154
 155 // This method is for designed for a persistent key, such as string key stored in
 156 // resource bundle.
 157 void
 158 TextTrieMap::put(const UChar *key, void *value, UErrorCode &status) {
 159     fIsEmpty = FALSE;
 160     if (fLazyContents == NULL) {
 161         fLazyContents = new UVector(status);
 162         if (fLazyContents == NULL) {
 163             status = U_MEMORY_ALLOCATION_ERROR;
 164         }
 165     }
 166     if (U_FAILURE(status)) {
 167         return;
 168     }
 169     U_ASSERT(fLazyContents != NULL);
 170     UChar *s = const_cast<UChar *>(key);
 171     fLazyContents->addElement(s, status);
 172     fLazyContents->addElement(value, status);
 173 }
 174
 175 void
 176 TextTrieMap::putImpl(const UnicodeString &key, void *value, UErrorCode &status) {
 177     if (fNodes == NULL) {
 178         fNodesCapacity = 512;
 179         fNodes = (CharacterNode *)uprv_malloc(fNodesCapacity * sizeof(CharacterNode));
 180         fNodes[0].clear();  // Init root node.
 181         fNodesCount = 1;
 182     }
 183
 184     UnicodeString foldedKey;
 185     const UChar *keyBuffer;
 186     int32_t keyLength;
 187     if (fIgnoreCase) {
 188         // Ok to use fastCopyFrom() because we discard the copy when we return.
 189         foldedKey.fastCopyFrom(key).foldCase();
 190         keyBuffer = foldedKey.getBuffer();
 191         keyLength = foldedKey.length();
 192     } else {
 193         keyBuffer = key.getBuffer();
 194         keyLength = key.length();
 195     }
 196
 197     CharacterNode *node = fNodes;
 198     int32_t index;
 199     for (index = 0; index < keyLength; ++index) {
 200         node = addChildNode(node, keyBuffer[index], status);
 201     }
 202     node->addValue(value, fValueDeleter, status);
 203 }
 204
 205 UBool
 206 TextTrieMap::growNodes() {
 207     if (fNodesCapacity == 0xffff) {
 208         return FALSE;  // We use 16-bit node indexes.
 209     }
 210     int32_t newCapacity = fNodesCapacity + 1000;
 211     if (newCapacity > 0xffff) {
 212         newCapacity = 0xffff;
 213     }
 214     CharacterNode *newNodes = (CharacterNode *)uprv_malloc(newCapacity * sizeof(CharacterNode));
 215     if (newNodes == NULL) {
 216         return FALSE;
 217     }
 218     uprv_memcpy(newNodes, fNodes, fNodesCount * sizeof(CharacterNode));
 219     uprv_free(fNodes);
 220     fNodes = newNodes;
 221     fNodesCapacity = newCapacity;
 222     return TRUE;
 223 }
 224
 225 CharacterNode*
 226 TextTrieMap::addChildNode(CharacterNode *parent, UChar c, UErrorCode &status) {
 227     if (U_FAILURE(status)) {
 228         return NULL;
 229     }
 230     // Linear search of the sorted list of children.
 231     uint16_t prevIndex = 0;
 232     uint16_t nodeIndex = parent->fFirstChild;
 233     while (nodeIndex > 0) {
 234         CharacterNode *current = fNodes + nodeIndex;
 235         UChar childCharacter = current->fCharacter;
 236         if (childCharacter == c) {
 237             return current;
 238         } else if (childCharacter > c) {
 239             break;
 240         }
 241         prevIndex = nodeIndex;
 242         nodeIndex = current->fNextSibling;
 243     }
 244
 245     // Ensure capacity. Grow fNodes[] if needed.
 246     if (fNodesCount == fNodesCapacity) {
 247         int32_t parentIndex = (int32_t)(parent - fNodes);
 248         if (!growNodes()) {
 249             status = U_MEMORY_ALLOCATION_ERROR;
 250             return NULL;
 251         }
 252         parent = fNodes + parentIndex;
 253     }
 254
 255     // Insert a new child node with c in sorted order.
 256     CharacterNode *node = fNodes + fNodesCount;
 257     node->clear();
 258     node->fCharacter = c;
 259     node->fNextSibling = nodeIndex;
 260     if (prevIndex == 0) {
 261         parent->fFirstChild = (uint16_t)fNodesCount;
 262     } else {
 263         fNodes[prevIndex].fNextSibling = (uint16_t)fNodesCount;
 264     }
 265     ++fNodesCount;
 266     return node;
 267 }
 268
 269 CharacterNode*
 270 TextTrieMap::getChildNode(CharacterNode *parent, UChar c) const {
 271     // Linear search of the sorted list of children.
 272     uint16_t nodeIndex = parent->fFirstChild;
 273     while (nodeIndex > 0) {
 274         CharacterNode *current = fNodes + nodeIndex;
 275         UChar childCharacter = current->fCharacter;
 276         if (childCharacter == c) {
 277             return current;
 278         } else if (childCharacter > c) {
 279             break;
 280         }
 281         nodeIndex = current->fNextSibling;
 282     }
 283     return NULL;
 284 }
 285
 286 // Mutex for protecting the lazy creation of the Trie node structure on the first call to search().
 287 static UMutex TextTrieMutex = U_MUTEX_INITIALIZER;
 288
 289 // buildTrie() - The Trie node structure is needed.  Create it from the data that was
 290 //               saved at the time the ZoneStringFormatter was created.  The Trie is only
 291 //               needed for parsing operations, which are less common than formatting,
 292 //               and the Trie is big, which is why its creation is deferred until first use.
 293 void TextTrieMap::buildTrie(UErrorCode &status) {
 294     if (fLazyContents != NULL) {
 295         for (int32_t i=0; i<fLazyContents->size(); i+=2) {
 296             const UChar *key = (UChar *)fLazyContents->elementAt(i);
 297             void  *val = fLazyContents->elementAt(i+1);
 298             UnicodeString keyString(TRUE, key, -1);  // Aliasing UnicodeString constructor.
 299             putImpl(keyString, val, status);
 300         }
 301         delete fLazyContents;
 302         fLazyContents = NULL;
 303     }
 304 }
 305
 306 void
 307 TextTrieMap::search(const UnicodeString &text, int32_t start,
 308                   TextTrieMapSearchResultHandler *handler, UErrorCode &status) const {
 309     {
 310         // TODO: if locking the mutex for each check proves to be a performance problem,
 311         //       add a flag of type atomic_int32_t to class TextTrieMap, and use only
 312         //       the ICU atomic safe functions for assigning and testing.
 313         //       Don't test the pointer fLazyContents.
 314         //       Don't do unless it's really required.
 315         Mutex lock(&TextTrieMutex);
 316         if (fLazyContents != NULL) {
 317             TextTrieMap *nonConstThis = const_cast<TextTrieMap *>(this);
 318             nonConstThis->buildTrie(status);
 319         }
 320     }
 321     if (fNodes == NULL) {
 322         return;
 323     }
 324     search(fNodes, text, start, start, handler, status);
 325 }
 326
 327 void
 328 TextTrieMap::search(CharacterNode *node, const UnicodeString &text, int32_t start,
 329                   int32_t index, TextTrieMapSearchResultHandler *handler, UErrorCode &status) const {
 330     if (U_FAILURE(status)) {
 331         return;
 332     }
 333     if (node->hasValues()) {
 334         if (!handler->handleMatch(index - start, node, status)) {
 335             return;
 336         }
 337         if (U_FAILURE(status)) {
 338             return;
 339         }
 340     }
 341     UChar32 c = text.char32At(index);
 342     if (fIgnoreCase) {
 343         // size of character may grow after fold operation
 344         UnicodeString tmp(c);
 345         tmp.foldCase();
 346         int32_t tmpidx = 0;
 347         while (tmpidx < tmp.length()) {
 348             c = tmp.char32At(tmpidx);
 349             node = getChildNode(node, c);
 350             if (node == NULL) {
 351                 break;
 352             }
 353             tmpidx = tmp.moveIndex32(tmpidx, 1);
 354         }
 355     } else {
 356         node = getChildNode(node, c);
 357     }
 358     if (node != NULL) {
 359         search(node, text, start, index+1, handler, status);
 360     }
 361 }
 362
 363 // ---------------------------------------------------
 364 // ZNStringPool class implementation
 365 // ---------------------------------------------------
 366 static const int32_t POOL_CHUNK_SIZE = 2000;
 367 struct ZNStringPoolChunk: public UMemory {
 368     ZNStringPoolChunk    *fNext;                       // Ptr to next pool chunk
 369     int32_t               fLimit;                       // Index to start of unused area at end of fStrings
 370     UChar                 fStrings[POOL_CHUNK_SIZE];    //  Strings array
 371     ZNStringPoolChunk();
 372 };
 373
 374 ZNStringPoolChunk::ZNStringPoolChunk() {
 375     fNext = NULL;
 376     fLimit = 0;
 377 }
 378
 379 ZNStringPool::ZNStringPool(UErrorCode &status) {
 380     fChunks = NULL;
 381     fHash   = NULL;
 382     if (U_FAILURE(status)) {
 383         return;
 384     }
 385     fChunks = new ZNStringPoolChunk;
 386     if (fChunks == NULL) {
 387         status = U_MEMORY_ALLOCATION_ERROR;
 388         return;
 389     }
 390
 391     fHash   = uhash_open(uhash_hashUChars      /* keyHash */,
 392                          uhash_compareUChars   /* keyComp */,
 393                          uhash_compareUChars   /* valueComp */,
 394                          &status);
 395     if (U_FAILURE(status)) {
 396         return;
 397     }
 398 }
 399
 400 ZNStringPool::~ZNStringPool() {
 401     if (fHash != NULL) {
 402         uhash_close(fHash);
 403         fHash = NULL;
 404     }
 405
 406     while (fChunks != NULL) {
 407         ZNStringPoolChunk *nextChunk = fChunks->fNext;
 408         delete fChunks;
 409         fChunks = nextChunk;
 410     }
 411 }
 412
 413 static const UChar EmptyString = 0;
 414
 415 const UChar *ZNStringPool::get(const UChar *s, UErrorCode &status) {
 416     const UChar *pooledString;
 417     if (U_FAILURE(status)) {
 418         return &EmptyString;
 419     }
 420
 421     pooledString = static_cast<UChar *>(uhash_get(fHash, s));
 422     if (pooledString != NULL) {
 423         return pooledString;
 424     }
 425
 426     int32_t length = u_strlen(s);
 427     int32_t remainingLength = POOL_CHUNK_SIZE - fChunks->fLimit;
 428     if (remainingLength <= length) {
 429         U_ASSERT(length < POOL_CHUNK_SIZE);
 430         if (length >= POOL_CHUNK_SIZE) {
 431             status = U_INTERNAL_PROGRAM_ERROR;
 432             return &EmptyString;
 433         }
 434         ZNStringPoolChunk *oldChunk = fChunks;
 435         fChunks = new ZNStringPoolChunk;
 436         if (fChunks == NULL) {
 437             status = U_MEMORY_ALLOCATION_ERROR;
 438             return &EmptyString;
 439         }
 440         fChunks->fNext = oldChunk;
 441     }
 442
 443     UChar *destString = &fChunks->fStrings[fChunks->fLimit];
 444     u_strcpy(destString, s);
 445     fChunks->fLimit += (length + 1);
 446     uhash_put(fHash, destString, destString, &status);
 447     return destString;
 448 }
 449
 450
 451 //
 452 //  ZNStringPool::adopt()    Put a string into the hash, but do not copy the string data
 453 //                           into the pool's storage.  Used for strings from resource bundles,
 454 //                           which will perisist for the life of the zone string formatter, and
 455 //                           therefore can be used directly without copying.
 456 const UChar *ZNStringPool::adopt(const UChar * s, UErrorCode &status) {
 457     const UChar *pooledString;
 458     if (U_FAILURE(status)) {
 459         return &EmptyString;
 460     }
 461     if (s != NULL) {
 462         pooledString = static_cast<UChar *>(uhash_get(fHash, s));
 463         if (pooledString == NULL) {
 464             UChar *ncs = const_cast<UChar *>(s);
 465             uhash_put(fHash, ncs, ncs, &status);
 466         }
 467     }
 468     return s;
 469 }
 470
 471
 472 const UChar *ZNStringPool::get(const UnicodeString &s, UErrorCode &status) {
 473     UnicodeString &nonConstStr = const_cast<UnicodeString &>(s);
 474     return this->get(nonConstStr.getTerminatedBuffer(), status);
 475 }
 476
 477 /*
 478  * freeze().   Close the hash table that maps to the pooled strings.
 479  *             After freezing, the pool can not be searched or added to,
 480  *             but all existing references to pooled strings remain valid.
 481  *
 482  *             The main purpose is to recover the storage used for the hash.
 483  */
 484 void ZNStringPool::freeze() {
 485     uhash_close(fHash);
 486     fHash = NULL;
 487 }
 488
 489
 490 // ---------------------------------------------------
 491 // ZNames - names common for time zone and meta zone
 492 // ---------------------------------------------------
 493 class ZNames : public UMemory {
 494 public:
 495     virtual ~ZNames();
 496
 497     static ZNames* createInstance(UResourceBundle* rb, const char* key);
 498     virtual const UChar* getName(UTimeZoneNameType type);
 499
 500 protected:
 501     ZNames(const UChar** names);
 502     static const UChar** loadData(UResourceBundle* rb, const char* key);
 503
 504 private:
 505     const UChar** fNames;
 506 };
 507
 508 ZNames::ZNames(const UChar** names)
 509 : fNames(names) {
 510 }
 511
 512 ZNames::~ZNames() {
 513     if (fNames != NULL) {
 514         uprv_free(fNames);
 515     }
 516 }
 517
 518 ZNames*
 519 ZNames::createInstance(UResourceBundle* rb, const char* key) {
 520     const UChar** names = loadData(rb, key);
 521     if (names == NULL) {
 522         // No names data available
 523         return NULL;
 524     }
 525     return new ZNames(names);
 526 }
 527
 528 const UChar*
 529 ZNames::getName(UTimeZoneNameType type) {
 530     if (fNames == NULL) {
 531         return NULL;
 532     }
 533     const UChar *name = NULL;
 534     switch(type) {
 535     case UTZNM_LONG_GENERIC:
 536         name = fNames[0];
 537         break;
 538     case UTZNM_LONG_STANDARD:
 539         name = fNames[1];
 540         break;
 541     case UTZNM_LONG_DAYLIGHT:
 542         name = fNames[2];
 543         break;
 544     case UTZNM_SHORT_GENERIC:
 545         name = fNames[3];
 546         break;
 547     case UTZNM_SHORT_STANDARD:
 548         name = fNames[4];
 549         break;
 550     case UTZNM_SHORT_DAYLIGHT:
 551         name = fNames[5];
 552         break;
 553     case UTZNM_EXEMPLAR_LOCATION:   // implemeted by subclass
 554     default:
 555         name = NULL;
 556     }
 557     return name;
 558 }
 559
 560 const UChar**
 561 ZNames::loadData(UResourceBundle* rb, const char* key) {
 562     if (rb == NULL || key == NULL || *key == 0) {
 563         return NULL;
 564     }
 565
 566     UErrorCode status = U_ZERO_ERROR;
 567     const UChar **names = NULL;
 568
 569     UResourceBundle* rbTable = NULL;
 570     rbTable = ures_getByKeyWithFallback(rb, key, rbTable, &status);
 571     if (U_SUCCESS(status)) {
 572         names = (const UChar **)uprv_malloc(sizeof(const UChar*) * KEYS_SIZE);
 573         if (names != NULL) {
 574             UBool isEmpty = TRUE;
 575             for (int32_t i = 0; i < KEYS_SIZE; i++) {
 576                 status = U_ZERO_ERROR;
 577                 int32_t len = 0;
 578                 const UChar *value = ures_getStringByKeyWithFallback(rbTable, KEYS[i], &len, &status);
 579                 if (U_FAILURE(status) || len == 0) {
 580                     names[i] = NULL;
 581                 } else {
 582                     names[i] = value;
 583                     isEmpty = FALSE;
 584                 }
 585             }
 586             if (isEmpty) {
 587                 // No need to keep the names array
 588                 uprv_free(names);
 589                 names = NULL;
 590             }
 591         }
 592     }
 593     ures_close(rbTable);
 594     return names;
 595 }
 596
 597 // ---------------------------------------------------
 598 // TZNames - names for a time zone
 599 // ---------------------------------------------------
 600 class TZNames : public ZNames {
 601 public:
 602     virtual ~TZNames();
 603
 604     static TZNames* createInstance(UResourceBundle* rb, const char* key, const UnicodeString& tzID);
 605     virtual const UChar* getName(UTimeZoneNameType type);
 606
 607 private:
 608     TZNames(const UChar** names);
 609     const UChar* fLocationName;
 610     UChar* fLocationNameOwned;
 611 };
 612
 613 TZNames::TZNames(const UChar** names)
 614 : ZNames(names), fLocationName(NULL), fLocationNameOwned(NULL) {
 615 }
 616
 617 TZNames::~TZNames() {
 618     if (fLocationNameOwned) {
 619         uprv_free(fLocationNameOwned);
 620     }
 621 }
 622
 623 const UChar*
 624 TZNames::getName(UTimeZoneNameType type) {
 625     if (type == UTZNM_EXEMPLAR_LOCATION) {
 626         return fLocationName;
 627     }
 628     return ZNames::getName(type);
 629 }
 630
 631 TZNames*
 632 TZNames::createInstance(UResourceBundle* rb, const char* key, const UnicodeString& tzID) {
 633     if (rb == NULL || key == NULL || *key == 0) {
 634         return NULL;
 635     }
 636
 637     const UChar** names = loadData(rb, key);
 638     const UChar* locationName = NULL;
 639     UChar* locationNameOwned = NULL;
 640
 641     UErrorCode status = U_ZERO_ERROR;
 642     int32_t len = 0;
 643
 644     UResourceBundle* table = ures_getByKeyWithFallback(rb, key, NULL, &status);
 645     locationName = ures_getStringByKeyWithFallback(table, gEcTag, &len, &status);
 646     // ignore missing resource here
 647     status = U_ZERO_ERROR;
 648
 649     ures_close(table);
 650
 651     if (locationName == NULL) {
 652         UnicodeString tmpName;
 653         int32_t tmpNameLen = 0;
 654         TimeZoneNamesImpl::getDefaultExemplarLocationName(tzID, tmpName);
 655         tmpNameLen = tmpName.length();
 656
 657         if (tmpNameLen > 0) {
 658             locationNameOwned = (UChar*) uprv_malloc(sizeof(UChar) * (tmpNameLen + 1));
 659             if (locationNameOwned) {
 660                 tmpName.extract(locationNameOwned, tmpNameLen + 1, status);
 661                 locationName = locationNameOwned;
 662             }
 663         }
 664     }
 665
 666     TZNames* tznames = NULL;
 667     if (locationName != NULL || names != NULL) {
 668         tznames = new TZNames(names);
 669         if (tznames == NULL) {
 670             if (locationNameOwned) {
 671                 uprv_free(locationNameOwned);
 672             }
 673         }
 674         tznames->fLocationName = locationName;
 675         tznames->fLocationNameOwned = locationNameOwned;
 676     }
 677
 678     return tznames;
 679 }
 680
 681 // ---------------------------------------------------
 682 // The meta zone ID enumeration class
 683 // ---------------------------------------------------
 684 class MetaZoneIDsEnumeration : public StringEnumeration {
 685 public:
 686     MetaZoneIDsEnumeration();
 687     MetaZoneIDsEnumeration(const UVector& mzIDs);
 688     MetaZoneIDsEnumeration(UVector* mzIDs);
 689     virtual ~MetaZoneIDsEnumeration();
 690     static UClassID U_EXPORT2 getStaticClassID(void);
 691     virtual UClassID getDynamicClassID(void) const;
 692     virtual const UnicodeString* snext(UErrorCode& status);
 693     virtual void reset(UErrorCode& status);
 694     virtual int32_t count(UErrorCode& status) const;
 695 private:
 696     int32_t fLen;
 697     int32_t fPos;
 698     const UVector* fMetaZoneIDs;
 699     UVector *fLocalVector;
 700 };
 701
 702 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(MetaZoneIDsEnumeration)
 703
 704 MetaZoneIDsEnumeration::MetaZoneIDsEnumeration()
 705 : fLen(0), fPos(0), fMetaZoneIDs(NULL), fLocalVector(NULL) {
 706 }
 707
 708 MetaZoneIDsEnumeration::MetaZoneIDsEnumeration(const UVector& mzIDs)
 709 : fPos(0), fMetaZoneIDs(&mzIDs), fLocalVector(NULL) {
 710     fLen = fMetaZoneIDs->size();
 711 }
 712
 713 MetaZoneIDsEnumeration::MetaZoneIDsEnumeration(UVector *mzIDs)
 714 : fLen(0), fPos(0), fMetaZoneIDs(mzIDs), fLocalVector(mzIDs) {
 715     if (fMetaZoneIDs) {
 716         fLen = fMetaZoneIDs->size();
 717     }
 718 }
 719
 720 const UnicodeString*
 721 MetaZoneIDsEnumeration::snext(UErrorCode& status) {
 722     if (U_SUCCESS(status) && fMetaZoneIDs != NULL && fPos < fLen) {
 723         unistr.setTo((const UChar*)fMetaZoneIDs->elementAt(fPos++), -1);
 724         return &unistr;
 725     }
 726     return NULL;
 727 }
 728
 729 void
 730 MetaZoneIDsEnumeration::reset(UErrorCode& /*status*/) {
 731     fPos = 0;
 732 }
 733
 734 int32_t
 735 MetaZoneIDsEnumeration::count(UErrorCode& /*status*/) const {
 736     return fLen;
 737 }
 738
 739 MetaZoneIDsEnumeration::~MetaZoneIDsEnumeration() {
 740     if (fLocalVector) {
 741         delete fLocalVector;
 742     }
 743 }
 744
 745 U_CDECL_BEGIN
 746 /**
 747  * ZNameInfo stores zone name information in the trie
 748  */
 749 typedef struct ZNameInfo {
 750     UTimeZoneNameType   type;
 751     const UChar*        tzID;
 752     const UChar*        mzID;
 753 } ZNameInfo;
 754
 755 /**
 756  * ZMatchInfo stores zone name match information used by find method
 757  */
 758 typedef struct ZMatchInfo {
 759     const ZNameInfo*    znameInfo;
 760     int32_t             matchLength;
 761 } ZMatchInfo;
 762 U_CDECL_END
 763
 764
 765 // ---------------------------------------------------
 766 // ZNameSearchHandler
 767 // ---------------------------------------------------
 768 class ZNameSearchHandler : public TextTrieMapSearchResultHandler {
 769 public:
 770     ZNameSearchHandler(uint32_t types);
 771     virtual ~ZNameSearchHandler();
 772
 773     UBool handleMatch(int32_t matchLength, const CharacterNode *node, UErrorCode &status);
 774     TimeZoneNames::MatchInfoCollection* getMatches(int32_t& maxMatchLen);
 775
 776 private:
 777     uint32_t fTypes;
 778     int32_t fMaxMatchLen;
 779     TimeZoneNames::MatchInfoCollection* fResults;
 780 };
 781
 782 ZNameSearchHandler::ZNameSearchHandler(uint32_t types)
 783 : fTypes(types), fMaxMatchLen(0), fResults(NULL) {
 784 }
 785
 786 ZNameSearchHandler::~ZNameSearchHandler() {
 787     if (fResults != NULL) {
 788         delete fResults;
 789     }
 790 }
 791
 792 UBool
 793 ZNameSearchHandler::handleMatch(int32_t matchLength, const CharacterNode *node, UErrorCode &status) {
 794     if (U_FAILURE(status)) {
 795         return FALSE;
 796     }
 797     if (node->hasValues()) {
 798         int32_t valuesCount = node->countValues();
 799         for (int32_t i = 0; i < valuesCount; i++) {
 800             ZNameInfo *nameinfo = (ZNameInfo *)node->getValue(i);
 801             if (nameinfo == NULL) {
 802                 break;
 803             }
 804             if ((nameinfo->type & fTypes) != 0) {
 805                 // matches a requested type
 806                 if (fResults == NULL) {
 807                     fResults = new TimeZoneNames::MatchInfoCollection();
 808                     if (fResults == NULL) {
 809                         status = U_MEMORY_ALLOCATION_ERROR;
 810                     }
 811                 }
 812                 if (U_SUCCESS(status)) {
 813                     U_ASSERT(fResults != NULL);
 814                     if (nameinfo->tzID) {
 815                         fResults->addZone(nameinfo->type, matchLength, UnicodeString(nameinfo->tzID, -1), status);
 816                     } else {
 817                         U_ASSERT(nameinfo->mzID);
 818                         fResults->addMetaZone(nameinfo->type, matchLength, UnicodeString(nameinfo->mzID, -1), status);
 819                     }
 820                     if (U_SUCCESS(status) && matchLength > fMaxMatchLen) {
 821                         fMaxMatchLen = matchLength;
 822                     }
 823                 }
 824             }
 825         }
 826     }
 827     return TRUE;
 828 }
 829
 830 TimeZoneNames::MatchInfoCollection*
 831 ZNameSearchHandler::getMatches(int32_t& maxMatchLen) {
 832     // give the ownership to the caller
 833     TimeZoneNames::MatchInfoCollection* results = fResults;
 834     maxMatchLen = fMaxMatchLen;
 835
 836     // reset
 837     fResults = NULL;
 838     fMaxMatchLen = 0;
 839     return results;
 840 }
 841
 842 // ---------------------------------------------------
 843 // TimeZoneNamesImpl
 844 //
 845 // TimeZoneNames implementation class. This is the main
 846 // part of this module.
 847 // ---------------------------------------------------
 848
 849 U_CDECL_BEGIN
 850 /**
 851  * Deleter for ZNames
 852  */
 853 static void U_CALLCONV
 854 deleteZNames(void *obj) {
 855     if (obj != EMPTY) {
 856         delete (ZNames *)obj;
 857     }
 858 }
 859 /**
 860  * Deleter for TZNames
 861  */
 862 static void U_CALLCONV
 863 deleteTZNames(void *obj) {
 864     if (obj != EMPTY) {
 865         delete (TZNames *)obj;
 866     }
 867 }
 868
 869 /**
 870  * Deleter for ZNameInfo
 871  */
 872 static void U_CALLCONV
 873 deleteZNameInfo(void *obj) {
 874     uprv_free(obj);
 875 }
 876
 877 U_CDECL_END
 878
 879 static UMutex gLock = U_MUTEX_INITIALIZER;
 880
 881 TimeZoneNamesImpl::TimeZoneNamesImpl(const Locale& locale, UErrorCode& status)
 882 : fLocale(locale),
 883   fZoneStrings(NULL),
 884   fTZNamesMap(NULL),
 885   fMZNamesMap(NULL),
 886   fNamesTrieFullyLoaded(FALSE),
 887   fNamesTrie(TRUE, deleteZNameInfo) {
 888     initialize(locale, status);
 889 }
 890
 891 void
 892 TimeZoneNamesImpl::initialize(const Locale& locale, UErrorCode& status) {
 893     if (U_FAILURE(status)) {
 894         return;
 895     }
 896
 897     // Load zoneStrings bundle
 898     UErrorCode tmpsts = U_ZERO_ERROR;   // OK with fallback warning..
 899     fZoneStrings = ures_open(U_ICUDATA_ZONE, locale.getName(), &tmpsts);
 900     fZoneStrings = ures_getByKeyWithFallback(fZoneStrings, gZoneStrings, fZoneStrings, &tmpsts);
 901     if (U_FAILURE(tmpsts)) {
 902         status = tmpsts;
 903         cleanup();
 904         return;
 905     }
 906
 907     // Initialize hashtables holding time zone/meta zone names
 908     fMZNamesMap = uhash_open(uhash_hashUChars, uhash_compareUChars, NULL, &status);
 909     fTZNamesMap = uhash_open(uhash_hashUChars, uhash_compareUChars, NULL, &status);
 910     if (U_FAILURE(status)) {
 911         cleanup();
 912         return;
 913     }
 914
 915     uhash_setValueDeleter(fMZNamesMap, deleteZNames);
 916     uhash_setValueDeleter(fTZNamesMap, deleteTZNames);
 917     // no key deleters for name maps
 918
 919     // preload zone strings for the default zone
 920     TimeZone *tz = TimeZone::createDefault();
 921     const UChar *tzID = ZoneMeta::getCanonicalCLDRID(*tz);
 922     if (tzID != NULL) {
 923         loadStrings(UnicodeString(tzID));
 924     }
 925     delete tz;
 926
 927     return;
 928 }
 929
 930 /*
 931  * This method updates the cache and must be called with a lock,
 932  * except initializer.
 933  */
 934 void
 935 TimeZoneNamesImpl::loadStrings(const UnicodeString& tzCanonicalID) {
 936     loadTimeZoneNames(tzCanonicalID);
 937
 938     UErrorCode status = U_ZERO_ERROR;
 939     StringEnumeration *mzIDs = getAvailableMetaZoneIDs(tzCanonicalID, status);
 940     if (U_SUCCESS(status) && mzIDs != NULL) {
 941         const UnicodeString *mzID;
 942         while ((mzID = mzIDs->snext(status))) {
 943             if (U_FAILURE(status)) {
 944                 break;
 945             }
 946             loadMetaZoneNames(*mzID);
 947         }
 948         delete mzIDs;
 949     }
 950 }
 951
 952 TimeZoneNamesImpl::~TimeZoneNamesImpl() {
 953     cleanup();
 954 }
 955
 956 void
 957 TimeZoneNamesImpl::cleanup() {
 958     if (fZoneStrings != NULL) {
 959         ures_close(fZoneStrings);
 960         fZoneStrings = NULL;
 961     }
 962     if (fMZNamesMap != NULL) {
 963         uhash_close(fMZNamesMap);
 964         fMZNamesMap = NULL;
 965     }
 966     if (fTZNamesMap != NULL) {
 967         uhash_close(fTZNamesMap);
 968         fTZNamesMap = NULL;
 969     }
 970 }
 971
 972 UBool
 973 TimeZoneNamesImpl::operator==(const TimeZoneNames& other) const {
 974     if (this == &other) {
 975         return TRUE;
 976     }
 977     // No implementation for now
 978     return FALSE;
 979 }
 980
 981 TimeZoneNames*
 982 TimeZoneNamesImpl::clone() const {
 983     UErrorCode status = U_ZERO_ERROR;
 984     return new TimeZoneNamesImpl(fLocale, status);
 985 }
 986
 987 StringEnumeration*
 988 TimeZoneNamesImpl::getAvailableMetaZoneIDs(UErrorCode& status) const {
 989     if (U_FAILURE(status)) {
 990         return NULL;
 991     }
 992     const UVector* mzIDs = ZoneMeta::getAvailableMetazoneIDs();
 993     if (mzIDs == NULL) {
 994         return new MetaZoneIDsEnumeration();
 995     }
 996     return new MetaZoneIDsEnumeration(*mzIDs);
 997 }
 998
 999 StringEnumeration*
1000 TimeZoneNamesImpl::getAvailableMetaZoneIDs(const UnicodeString& tzID, UErrorCode& status) const {
1001     if (U_FAILURE(status)) {
1002         return NULL;
1003     }
1004     const UVector* mappings = ZoneMeta::getMetazoneMappings(tzID);
1005     if (mappings == NULL) {
1006         return new MetaZoneIDsEnumeration();
1007     }
1008
1009     MetaZoneIDsEnumeration *senum = NULL;
1010     UVector* mzIDs = new UVector(NULL, uhash_compareUChars, status);
1011     if (mzIDs == NULL) {
1012         status = U_MEMORY_ALLOCATION_ERROR;
1013     }
1014     if (U_SUCCESS(status)) {
1015         U_ASSERT(mzIDs != NULL);
1016         for (int32_t i = 0; U_SUCCESS(status) && i < mappings->size(); i++) {
1017
1018             OlsonToMetaMappingEntry *map = (OlsonToMetaMappingEntry *)mappings->elementAt(i);
1019             const UChar *mzID = map->mzid;
1020             if (!mzIDs->contains((void *)mzID)) {
1021                 mzIDs->addElement((void *)mzID, status);
1022             }
1023         }
1024         if (U_SUCCESS(status)) {
1025             senum = new MetaZoneIDsEnumeration(mzIDs);
1026         } else {
1027             delete mzIDs;
1028         }
1029     }
1030     return senum;
1031 }
1032
1033 UnicodeString&
1034 TimeZoneNamesImpl::getMetaZoneID(const UnicodeString& tzID, UDate date, UnicodeString& mzID) const {
1035     ZoneMeta::getMetazoneID(tzID, date, mzID);
1036     return mzID;
1037 }
1038
1039 UnicodeString&
1040 TimeZoneNamesImpl::getReferenceZoneID(const UnicodeString& mzID, const char* region, UnicodeString& tzID) const {
1041     ZoneMeta::getZoneIdByMetazone(mzID, UnicodeString(region, -1, US_INV), tzID);
1042     return tzID;
1043 }
1044
1045 UnicodeString&
1046 TimeZoneNamesImpl::getMetaZoneDisplayName(const UnicodeString& mzID,
1047                                           UTimeZoneNameType type,
1048                                           UnicodeString& name) const {
1049     name.setToBogus();  // cleanup result.
1050     if (mzID.isEmpty()) {
1051         return name;
1052     }
1053
1054     ZNames *znames = NULL;
1055     TimeZoneNamesImpl *nonConstThis = const_cast<TimeZoneNamesImpl *>(this);
1056
1057     umtx_lock(&gLock);
1058     {
1059         znames = nonConstThis->loadMetaZoneNames(mzID);
1060     }
1061     umtx_unlock(&gLock);
1062
1063     if (znames != NULL) {
1064         const UChar* s = znames->getName(type);
1065         if (s != NULL) {
1066             name.setTo(TRUE, s, -1);
1067         }
1068     }
1069     return name;
1070 }
1071
1072 UnicodeString&
1073 TimeZoneNamesImpl::getTimeZoneDisplayName(const UnicodeString& tzID, UTimeZoneNameType type, UnicodeString& name) const {
1074     name.setToBogus();  // cleanup result.
1075     if (tzID.isEmpty()) {
1076         return name;
1077     }
1078
1079     TZNames *tznames = NULL;
1080     TimeZoneNamesImpl *nonConstThis = const_cast<TimeZoneNamesImpl *>(this);
1081
1082     umtx_lock(&gLock);
1083     {
1084         tznames = nonConstThis->loadTimeZoneNames(tzID);
1085     }
1086     umtx_unlock(&gLock);
1087
1088     if (tznames != NULL) {
1089         const UChar *s = tznames->getName(type);
1090         if (s != NULL) {
1091             name.setTo(TRUE, s, -1);
1092         }
1093     }
1094     return name;
1095 }
1096
1097 UnicodeString&
1098 TimeZoneNamesImpl::getExemplarLocationName(const UnicodeString& tzID, UnicodeString& name) const {
1099     name.setToBogus();  // cleanup result.
1100     const UChar* locName = NULL;
1101     TZNames *tznames = NULL;
1102     TimeZoneNamesImpl *nonConstThis = const_cast<TimeZoneNamesImpl *>(this);
1103
1104     umtx_lock(&gLock);
1105     {
1106         tznames = nonConstThis->loadTimeZoneNames(tzID);
1107     }
1108     umtx_unlock(&gLock);
1109
1110     if (tznames != NULL) {
1111         locName = tznames->getName(UTZNM_EXEMPLAR_LOCATION);
1112     }
1113     if (locName != NULL) {
1114         name.setTo(TRUE, locName, -1);
1115     }
1116
1117     return name;
1118 }
1119
1120
1121 // Merge the MZ_PREFIX and mzId
1122 static void mergeTimeZoneKey(const UnicodeString& mzID, char* result) {
1123     if (mzID.isEmpty()) {
1124         result[0] = '\0';
1125         return;
1126     }
1127
1128     char mzIdChar[ZID_KEY_MAX + 1];
1129     int32_t keyLen;
1130     int32_t prefixLen = uprv_strlen(gMZPrefix);
1131     keyLen = mzID.extract(0, mzID.length(), mzIdChar, ZID_KEY_MAX + 1, US_INV);
1132     uprv_memcpy((void *)result, (void *)gMZPrefix, prefixLen);
1133     uprv_memcpy((void *)(result + prefixLen), (void *)mzIdChar, keyLen);
1134     result[keyLen + prefixLen] = '\0';
1135 }
1136
1137 /*
1138  * This method updates the cache and must be called with a lock
1139  */
1140 ZNames*
1141 TimeZoneNamesImpl::loadMetaZoneNames(const UnicodeString& mzID) {
1142     if (mzID.length() > (ZID_KEY_MAX - MZ_PREFIX_LEN)) {
1143         return NULL;
1144     }
1145
1146     ZNames *znames = NULL;
1147
1148     UErrorCode status = U_ZERO_ERROR;
1149     UChar mzIDKey[ZID_KEY_MAX + 1];
1150     mzID.extract(mzIDKey, ZID_KEY_MAX + 1, status);
1151     U_ASSERT(status == U_ZERO_ERROR);   // already checked length above
1152     mzIDKey[mzID.length()] = 0;
1153
1154     void *cacheVal = uhash_get(fMZNamesMap, mzIDKey);
1155     if (cacheVal == NULL) {
1156         char key[ZID_KEY_MAX + 1];
1157         mergeTimeZoneKey(mzID, key);
1158         znames = ZNames::createInstance(fZoneStrings, key);
1159
1160         if (znames == NULL) {
1161             cacheVal = (void *)EMPTY;
1162         } else {
1163             cacheVal = znames;
1164         }
1165         // Use the persistent ID as the resource key, so we can
1166         // avoid duplications.
1167         const UChar* newKey = ZoneMeta::findMetaZoneID(mzID);
1168         if (newKey != NULL) {
1169             uhash_put(fMZNamesMap, (void *)newKey, cacheVal, &status);
1170             if (U_FAILURE(status)) {
1171                 if (znames != NULL) {
1172                     delete znames;
1173                 }
1174             } else if (znames != NULL) {
1175                 // put the name info into the trie
1176                 for (int32_t i = 0; ALL_NAME_TYPES[i] != UTZNM_UNKNOWN; i++) {
1177                     const UChar* name = znames->getName(ALL_NAME_TYPES[i]);
1178                     if (name != NULL) {
1179                         ZNameInfo *nameinfo = (ZNameInfo *)uprv_malloc(sizeof(ZNameInfo));
1180                         if (nameinfo != NULL) {
1181                             nameinfo->type = ALL_NAME_TYPES[i];
1182                             nameinfo->tzID = NULL;
1183                             nameinfo->mzID = newKey;
1184                             fNamesTrie.put(name, nameinfo, status);
1185                         }
1186                     }
1187                 }
1188             }
1189
1190         } else {
1191             // Should never happen with a valid input
1192             if (znames != NULL) {
1193                 // It's not possible that we get a valid ZNames with unknown ID.
1194                 // But just in case..
1195                 delete znames;
1196                 znames = NULL;
1197             }
1198         }
1199     } else if (cacheVal != EMPTY) {
1200         znames = (ZNames *)cacheVal;
1201     }
1202
1203     return znames;
1204 }
1205
1206 /*
1207  * This method updates the cache and must be called with a lock
1208  */
1209 TZNames*
1210 TimeZoneNamesImpl::loadTimeZoneNames(const UnicodeString& tzID) {
1211     if (tzID.length() > ZID_KEY_MAX) {
1212         return NULL;
1213     }
1214
1215     TZNames *tznames = NULL;
1216
1217     UErrorCode status = U_ZERO_ERROR;
1218     UChar tzIDKey[ZID_KEY_MAX + 1];
1219     int32_t tzIDKeyLen = tzID.extract(tzIDKey, ZID_KEY_MAX + 1, status);
1220     U_ASSERT(status == U_ZERO_ERROR);   // already checked length above
1221     tzIDKey[tzIDKeyLen] = 0;
1222
1223     void *cacheVal = uhash_get(fTZNamesMap, tzIDKey);
1224     if (cacheVal == NULL) {
1225         char key[ZID_KEY_MAX + 1];
1226         UErrorCode status = U_ZERO_ERROR;
1227         // Replace "/" with ":".
1228         UnicodeString uKey(tzID);
1229         for (int32_t i = 0; i < uKey.length(); i++) {
1230             if (uKey.charAt(i) == (UChar)0x2F) {
1231                 uKey.setCharAt(i, (UChar)0x3A);
1232             }
1233         }
1234         uKey.extract(0, uKey.length(), key, sizeof(key), US_INV);
1235         tznames = TZNames::createInstance(fZoneStrings, key, tzID);
1236
1237         if (tznames == NULL) {
1238             cacheVal = (void *)EMPTY;
1239         } else {
1240             cacheVal = tznames;
1241         }
1242         // Use the persistent ID as the resource key, so we can
1243         // avoid duplications.
1244         const UChar* newKey = ZoneMeta::findTimeZoneID(tzID);
1245         if (newKey != NULL) {
1246             uhash_put(fTZNamesMap, (void *)newKey, cacheVal, &status);
1247             if (U_FAILURE(status)) {
1248                 if (tznames != NULL) {
1249                     delete tznames;
1250                 }
1251             } else if (tznames != NULL) {
1252                 // put the name info into the trie
1253                 for (int32_t i = 0; ALL_NAME_TYPES[i] != UTZNM_UNKNOWN; i++) {
1254                     const UChar* name = tznames->getName(ALL_NAME_TYPES[i]);
1255                     if (name != NULL) {
1256                         ZNameInfo *nameinfo = (ZNameInfo *)uprv_malloc(sizeof(ZNameInfo));
1257                         if (nameinfo != NULL) {
1258                             nameinfo->type = ALL_NAME_TYPES[i];
1259                             nameinfo->tzID = newKey;
1260                             nameinfo->mzID = NULL;
1261                             fNamesTrie.put(name, nameinfo, status);
1262                         }
1263                     }
1264                 }
1265             }
1266         } else {
1267             // Should never happen with a valid input
1268             if (tznames != NULL) {
1269                 // It's not possible that we get a valid TZNames with unknown ID.
1270                 // But just in case..
1271                 delete tznames;
1272                 tznames = NULL;
1273             }
1274         }
1275     } else if (cacheVal != EMPTY) {
1276         tznames = (TZNames *)cacheVal;
1277     }
1278
1279     return tznames;
1280 }
1281
1282 TimeZoneNames::MatchInfoCollection*
1283 TimeZoneNamesImpl::find(const UnicodeString& text, int32_t start, uint32_t types, UErrorCode& status) const {
1284     ZNameSearchHandler handler(types);
1285
1286     TimeZoneNamesImpl *nonConstThis = const_cast<TimeZoneNamesImpl *>(this);
1287
1288     umtx_lock(&gLock);
1289     {
1290         fNamesTrie.search(text, start, (TextTrieMapSearchResultHandler *)&handler, status);
1291     }
1292     umtx_unlock(&gLock);
1293
1294     if (U_FAILURE(status)) {
1295         return NULL;
1296     }
1297
1298     int32_t maxLen = 0;
1299     TimeZoneNames::MatchInfoCollection* matches = handler.getMatches(maxLen);
1300     if (matches != NULL && ((maxLen == (text.length() - start)) || fNamesTrieFullyLoaded)) {
1301         // perfect match
1302         return matches;
1303     }
1304
1305     delete matches;
1306
1307     // All names are not yet loaded into the trie
1308     umtx_lock(&gLock);
1309     {
1310         if (!fNamesTrieFullyLoaded) {
1311             const UnicodeString *id;
1312
1313             // load strings for all zones
1314             StringEnumeration *tzIDs = TimeZone::createTimeZoneIDEnumeration(UCAL_ZONE_TYPE_CANONICAL, NULL, NULL, status);
1315             if (U_SUCCESS(status)) {
1316                 while ((id = tzIDs->snext(status))) {
1317                     if (U_FAILURE(status)) {
1318                         break;
1319                     }
1320                     // loadStrings also load related metazone strings
1321                     nonConstThis->loadStrings(*id);
1322                 }
1323             }
1324             if (tzIDs != NULL) {
1325                 delete tzIDs;
1326             }
1327             if (U_SUCCESS(status)) {
1328                 nonConstThis->fNamesTrieFullyLoaded = TRUE;
1329             }
1330         }
1331     }
1332     umtx_unlock(&gLock);
1333
1334     if (U_FAILURE(status)) {
1335         return NULL;
1336     }
1337
1338     umtx_lock(&gLock);
1339     {
1340         // now try it again
1341         fNamesTrie.search(text, start, (TextTrieMapSearchResultHandler *)&handler, status);
1342     }
1343     umtx_unlock(&gLock);
1344
1345     return handler.getMatches(maxLen);
1346 }
1347
1348 static const UChar gEtcPrefix[]         = { 0x45, 0x74, 0x63, 0x2F }; // "Etc/"
1349 static const int32_t gEtcPrefixLen      = 4;
1350 static const UChar gSystemVPrefix[]     = { 0x53, 0x79, 0x73, 0x74, 0x65, 0x6D, 0x56, 0x2F }; // "SystemV/
1351 static const int32_t gSystemVPrefixLen  = 8;
1352 static const UChar gRiyadh8[]           = { 0x52, 0x69, 0x79, 0x61, 0x64, 0x68, 0x38 }; // "Riyadh8"
1353 static const int32_t gRiyadh8Len       = 7;
1354
1355 UnicodeString& U_EXPORT2
1356 TimeZoneNamesImpl::getDefaultExemplarLocationName(const UnicodeString& tzID, UnicodeString& name) {
1357     if (tzID.isEmpty() || tzID.startsWith(gEtcPrefix, gEtcPrefixLen)
1358         || tzID.startsWith(gSystemVPrefix, gSystemVPrefixLen) || tzID.indexOf(gRiyadh8, gRiyadh8Len, 0) > 0) {
1359         name.setToBogus();
1360         return name;
1361     }
1362
1363     int32_t sep = tzID.lastIndexOf((UChar)0x2F /* '/' */);
1364     if (sep > 0 && sep + 1 < tzID.length()) {
1365         name.setTo(tzID, sep + 1);
1366         name.findAndReplace(UnicodeString((UChar)0x5f /* _ */),
1367                             UnicodeString((UChar)0x20 /* space */));
1368     } else {
1369         name.setToBogus();
1370     }
1371     return name;
1372 }
1373
1374 U_NAMESPACE_END
1375
1376
1377 #endif /* #if !UCONFIG_NO_FORMATTING */
1378
1379 //eof