icuSources/common/locid.cpp

   1 /*
   2  **********************************************************************
   3  *   Copyright (C) 1997-2012, International Business Machines
   4  *   Corporation and others.  All Rights Reserved.
   5  **********************************************************************
   6 *
   7 * File locid.cpp
   8 *
   9 * Created by: Richard Gillam
  10 *
  11 * Modification History:
  12 *
  13 *   Date        Name        Description
  14 *   02/11/97    aliu        Changed gLocPath to fgDataDirectory and added
  15 *                           methods to get and set it.
  16 *   04/02/97    aliu        Made operator!= inline; fixed return value
  17 *                           of getName().
  18 *   04/15/97    aliu        Cleanup for AIX/Win32.
  19 *   04/24/97    aliu        Numerous changes per code review.
  20 *   08/18/98    stephen     Changed getDisplayName()
  21 *                           Added SIMPLIFIED_CHINESE, TRADITIONAL_CHINESE
  22 *                           Added getISOCountries(), getISOLanguages(),
  23 *                           getLanguagesForCountry()
  24 *   03/16/99    bertrand    rehaul.
  25 *   07/21/99    stephen     Added U_CFUNC setDefault
  26 *   11/09/99    weiv        Added const char * getName() const;
  27 *   04/12/00    srl         removing unicodestring api's and cached hash code
  28 *   08/10/01    grhoten     Change the static Locales to accessor functions
  29 ******************************************************************************
  30 */
  31
  32
  33 #include "unicode/locid.h"
  34 #include "unicode/uloc.h"
  35 #include "putilimp.h"
  36 #include "mutex.h"
  37 #include "umutex.h"
  38 #include "uassert.h"
  39 #include "cmemory.h"
  40 #include "cstring.h"
  41 #include "uhash.h"
  42 #include "ucln_cmn.h"
  43 #include "ustr_imp.h"
  44
  45 #define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0]))
  46
  47 U_CDECL_BEGIN
  48 static UBool U_CALLCONV locale_cleanup(void);
  49 U_CDECL_END
  50
  51 U_NAMESPACE_BEGIN
  52
  53 static Locale *gLocaleCache = NULL;
  54
  55 // gDefaultLocaleMutex protects all access to gDefaultLocalesHashT and gDefaultLocale.
  56 static UMutex gDefaultLocaleMutex = U_MUTEX_INITIALIZER;
  57 static UHashtable *gDefaultLocalesHashT = NULL;
  58 static Locale *gDefaultLocale = NULL;
  59
  60 U_NAMESPACE_END
  61
  62 typedef enum ELocalePos {
  63     eENGLISH,
  64     eFRENCH,
  65     eGERMAN,
  66     eITALIAN,
  67     eJAPANESE,
  68     eKOREAN,
  69     eCHINESE,
  70
  71     eFRANCE,
  72     eGERMANY,
  73     eITALY,
  74     eJAPAN,
  75     eKOREA,
  76     eCHINA,      /* Alias for PRC */
  77     eTAIWAN,
  78     eUK,
  79     eUS,
  80     eCANADA,
  81     eCANADA_FRENCH,
  82     eROOT,
  83
  84
  85     //eDEFAULT,
  86     eMAX_LOCALES
  87 } ELocalePos;
  88
  89 U_CFUNC int32_t locale_getKeywords(const char *localeID,
  90             char prev,
  91             char *keywords, int32_t keywordCapacity,
  92             char *values, int32_t valuesCapacity, int32_t *valLen,
  93             UBool valuesToo,
  94             UErrorCode *status);
  95
  96 U_CDECL_BEGIN
  97 //
  98 // Deleter function for Locales owned by the default Locale hash table/
  99 //
 100 static void U_CALLCONV
 101 deleteLocale(void *obj) {
 102     delete (icu::Locale *) obj;
 103 }
 104
 105 static UBool U_CALLCONV locale_cleanup(void)
 106 {
 107     U_NAMESPACE_USE
 108
 109     if (gLocaleCache) {
 110         delete [] gLocaleCache;
 111         gLocaleCache = NULL;
 112     }
 113
 114     if (gDefaultLocalesHashT) {
 115         uhash_close(gDefaultLocalesHashT);   // Automatically deletes all elements, using deleter func.
 116         gDefaultLocalesHashT = NULL;
 117         gDefaultLocale = NULL;
 118     }
 119
 120     return TRUE;
 121 }
 122 U_CDECL_END
 123
 124 U_NAMESPACE_BEGIN
 125
 126 Locale *locale_set_default_internal(const char *id, UErrorCode& status) {
 127     // Synchronize this entire function.
 128     Mutex lock(&gDefaultLocaleMutex);
 129
 130     UBool canonicalize = FALSE;
 131
 132     // If given a NULL string for the locale id, grab the default
 133     //   name from the system.
 134     //   (Different from most other locale APIs, where a null name means use
 135     //    the current ICU default locale.)
 136     if (id == NULL) {
 137         id = uprv_getDefaultLocaleID();   // This function not thread safe? TODO: verify.
 138         canonicalize = TRUE; // always canonicalize host ID
 139     }
 140
 141     char localeNameBuf[512];
 142
 143     if (canonicalize) {
 144         uloc_canonicalize(id, localeNameBuf, sizeof(localeNameBuf)-1, &status);
 145     } else {
 146         uloc_getName(id, localeNameBuf, sizeof(localeNameBuf)-1, &status);
 147     }
 148     localeNameBuf[sizeof(localeNameBuf)-1] = 0;  // Force null termination in event of
 149                                                  //   a long name filling the buffer.
 150                                                  //   (long names are truncated.)
 151                                                  //
 152     if (U_FAILURE(status)) {
 153         return gDefaultLocale;
 154     }
 155
 156     if (gDefaultLocalesHashT == NULL) {
 157         gDefaultLocalesHashT = uhash_open(uhash_hashChars, uhash_compareChars, NULL, &status);
 158         if (U_FAILURE(status)) {
 159             return gDefaultLocale;
 160         }
 161         uhash_setValueDeleter(gDefaultLocalesHashT, deleteLocale);
 162         ucln_common_registerCleanup(UCLN_COMMON_LOCALE, locale_cleanup);
 163     }
 164
 165     Locale *newDefault = (Locale *)uhash_get(gDefaultLocalesHashT, localeNameBuf);
 166     if (newDefault == NULL) {
 167         newDefault = new Locale(Locale::eBOGUS);
 168         if (newDefault == NULL) {
 169             status = U_MEMORY_ALLOCATION_ERROR;
 170             return gDefaultLocale;
 171         }
 172         newDefault->init(localeNameBuf, FALSE);
 173         uhash_put(gDefaultLocalesHashT, (char*) newDefault->getName(), newDefault, &status);
 174         if (U_FAILURE(status)) {
 175             return gDefaultLocale;
 176         }
 177     }
 178     gDefaultLocale = newDefault;
 179     return gDefaultLocale;
 180 }
 181
 182 U_NAMESPACE_END
 183
 184 /* sfb 07/21/99 */
 185 U_CFUNC void
 186 locale_set_default(const char *id)
 187 {
 188     U_NAMESPACE_USE
 189     UErrorCode status = U_ZERO_ERROR;
 190     locale_set_default_internal(id, status);
 191 }
 192 /* end */
 193
 194 U_CFUNC const char *
 195 locale_get_default(void)
 196 {
 197     U_NAMESPACE_USE
 198     return Locale::getDefault().getName();
 199 }
 200
 201
 202 U_NAMESPACE_BEGIN
 203
 204 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(Locale)
 205
 206 /*Character separating the posix id fields*/
 207 // '_'
 208 // In the platform codepage.
 209 #define SEP_CHAR '_'
 210
 211 Locale::~Locale()
 212 {
 213     /*if fullName is on the heap, we free it*/
 214     if (fullName != fullNameBuffer)
 215     {
 216         uprv_free(fullName);
 217         fullName = NULL;
 218     }
 219     if (baseName && baseName != baseNameBuffer) {
 220         uprv_free(baseName);
 221         baseName = NULL;
 222     }
 223 }
 224
 225 Locale::Locale()
 226     : UObject(), fullName(fullNameBuffer), baseName(NULL)
 227 {
 228     init(NULL, FALSE);
 229 }
 230
 231 /*
 232  * Internal constructor to allow construction of a locale object with
 233  *   NO side effects.   (Default constructor tries to get
 234  *   the default locale.)
 235  */
 236 Locale::Locale(Locale::ELocaleType)
 237     : UObject(), fullName(fullNameBuffer), baseName(NULL)
 238 {
 239     setToBogus();
 240 }
 241
 242
 243 Locale::Locale( const   char * newLanguage,
 244                 const   char * newCountry,
 245                 const   char * newVariant,
 246                 const   char * newKeywords)
 247     : UObject(), fullName(fullNameBuffer), baseName(NULL)
 248 {
 249     if( (newLanguage==NULL) && (newCountry == NULL) && (newVariant == NULL) )
 250     {
 251         init(NULL, FALSE); /* shortcut */
 252     }
 253     else
 254     {
 255         MaybeStackArray<char, ULOC_FULLNAME_CAPACITY> togo;
 256         int32_t size = 0;
 257         int32_t lsize = 0;
 258         int32_t csize = 0;
 259         int32_t vsize = 0;
 260         int32_t ksize = 0;
 261         char    *p;
 262
 263         // Calculate the size of the resulting string.
 264
 265         // Language
 266         if ( newLanguage != NULL )
 267         {
 268             lsize = (int32_t)uprv_strlen(newLanguage);
 269             size = lsize;
 270         }
 271
 272         // _Country
 273         if ( newCountry != NULL )
 274         {
 275             csize = (int32_t)uprv_strlen(newCountry);
 276             size += csize;
 277         }
 278
 279         // _Variant
 280         if ( newVariant != NULL )
 281         {
 282             // remove leading _'s
 283             while(newVariant[0] == SEP_CHAR)
 284             {
 285                 newVariant++;
 286             }
 287
 288             // remove trailing _'s
 289             vsize = (int32_t)uprv_strlen(newVariant);
 290             while( (vsize>1) && (newVariant[vsize-1] == SEP_CHAR) )
 291             {
 292                 vsize--;
 293             }
 294         }
 295
 296         if( vsize > 0 )
 297         {
 298             size += vsize;
 299         }
 300
 301         // Separator rules:
 302         if ( vsize > 0 )
 303         {
 304             size += 2;  // at least: __v
 305         }
 306         else if ( csize > 0 )
 307         {
 308             size += 1;  // at least: _v
 309         }
 310
 311         if ( newKeywords != NULL)
 312         {
 313             ksize = (int32_t)uprv_strlen(newKeywords);
 314             size += ksize + 1;
 315         }
 316
 317
 318         //  NOW we have the full locale string..
 319
 320         /*if the whole string is longer than our internal limit, we need
 321         to go to the heap for temporary buffers*/
 322         if (size >= togo.getCapacity())
 323         {
 324             // If togo_heap could not be created, initialize with default settings.
 325             if (togo.resize(size+1) == NULL) {
 326                 init(NULL, FALSE);
 327             }
 328         }
 329
 330         togo[0] = 0;
 331
 332         // Now, copy it back.
 333         p = togo.getAlias();
 334         if ( lsize != 0 )
 335         {
 336             uprv_strcpy(p, newLanguage);
 337             p += lsize;
 338         }
 339
 340         if ( ( vsize != 0 ) || (csize != 0) )  // at least:  __v
 341         {                                      //            ^
 342             *p++ = SEP_CHAR;
 343         }
 344
 345         if ( csize != 0 )
 346         {
 347             uprv_strcpy(p, newCountry);
 348             p += csize;
 349         }
 350
 351         if ( vsize != 0)
 352         {
 353             *p++ = SEP_CHAR; // at least: __v
 354
 355             uprv_strncpy(p, newVariant, vsize);  // Must use strncpy because
 356             p += vsize;                          // of trimming (above).
 357             *p = 0; // terminate
 358         }
 359
 360         if ( ksize != 0)
 361         {
 362             if (uprv_strchr(newKeywords, '=')) {
 363                 *p++ = '@'; /* keyword parsing */
 364             }
 365             else {
 366                 *p++ = '_'; /* Variant parsing with a script */
 367                 if ( vsize == 0) {
 368                     *p++ = '_'; /* No country found */
 369                 }
 370             }
 371             uprv_strcpy(p, newKeywords);
 372             p += ksize;
 373         }
 374
 375         // Parse it, because for example 'language' might really be a complete
 376         // string.
 377         init(togo.getAlias(), FALSE);
 378     }
 379 }
 380
 381 Locale::Locale(const Locale &other)
 382     : UObject(other), fullName(fullNameBuffer), baseName(NULL)
 383 {
 384     *this = other;
 385 }
 386
 387 Locale &Locale::operator=(const Locale &other)
 388 {
 389     if (this == &other) {
 390         return *this;
 391     }
 392
 393     if (&other == NULL) {
 394         this->setToBogus();
 395         return *this;
 396     }
 397
 398     /* Free our current storage */
 399     if(fullName != fullNameBuffer) {
 400         uprv_free(fullName);
 401         fullName = fullNameBuffer;
 402     }
 403
 404     /* Allocate the full name if necessary */
 405     if(other.fullName != other.fullNameBuffer) {
 406         fullName = (char *)uprv_malloc(sizeof(char)*(uprv_strlen(other.fullName)+1));
 407         if (fullName == NULL) {
 408             return *this;
 409         }
 410     }
 411     /* Copy the full name */
 412     uprv_strcpy(fullName, other.fullName);
 413
 414     /* baseName is the cached result of getBaseName.  if 'other' has a
 415        baseName and it fits in baseNameBuffer, then copy it. otherwise set
 416        it to NULL, and let the user lazy-create it (in getBaseName) if they
 417        want it. */
 418     if(baseName && baseName != baseNameBuffer) {
 419         uprv_free(baseName);
 420     }
 421     baseName = NULL;
 422
 423     if(other.baseName == other.baseNameBuffer) {
 424         uprv_strcpy(baseNameBuffer, other.baseNameBuffer);
 425         baseName = baseNameBuffer;
 426     }
 427
 428     /* Copy the language and country fields */
 429     uprv_strcpy(language, other.language);
 430     uprv_strcpy(script, other.script);
 431     uprv_strcpy(country, other.country);
 432
 433     /* The variantBegin is an offset, just copy it */
 434     variantBegin = other.variantBegin;
 435     fIsBogus = other.fIsBogus;
 436     return *this;
 437 }
 438
 439 Locale *
 440 Locale::clone() const {
 441     return new Locale(*this);
 442 }
 443
 444 UBool
 445 Locale::operator==( const   Locale& other) const
 446 {
 447     return (uprv_strcmp(other.fullName, fullName) == 0);
 448 }
 449
 450 #define ISASCIIALPHA(c) (((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z'))
 451
 452 /*This function initializes a Locale from a C locale ID*/
 453 Locale& Locale::init(const char* localeID, UBool canonicalize)
 454 {
 455     fIsBogus = FALSE;
 456     /* Free our current storage */
 457     if(fullName != fullNameBuffer) {
 458         uprv_free(fullName);
 459         fullName = fullNameBuffer;
 460     }
 461
 462     if(baseName && baseName != baseNameBuffer) {
 463         uprv_free(baseName);
 464         baseName = NULL;
 465     }
 466
 467     // not a loop:
 468     // just an easy way to have a common error-exit
 469     // without goto and without another function
 470     do {
 471         char *separator;
 472         char *field[5] = {0};
 473         int32_t fieldLen[5] = {0};
 474         int32_t fieldIdx;
 475         int32_t variantField;
 476         int32_t length;
 477         UErrorCode err;
 478
 479         if(localeID == NULL) {
 480             // not an error, just set the default locale
 481             return *this = getDefault();
 482         }
 483
 484         /* preset all fields to empty */
 485         language[0] = script[0] = country[0] = 0;
 486
 487         // "canonicalize" the locale ID to ICU/Java format
 488         err = U_ZERO_ERROR;
 489         length = canonicalize ?
 490             uloc_canonicalize(localeID, fullName, sizeof(fullNameBuffer), &err) :
 491             uloc_getName(localeID, fullName, sizeof(fullNameBuffer), &err);
 492
 493         if(err == U_BUFFER_OVERFLOW_ERROR || length >= (int32_t)sizeof(fullNameBuffer)) {
 494             /*Go to heap for the fullName if necessary*/
 495             fullName = (char *)uprv_malloc(sizeof(char)*(length + 1));
 496             if(fullName == 0) {
 497                 fullName = fullNameBuffer;
 498                 break; // error: out of memory
 499             }
 500             err = U_ZERO_ERROR;
 501             length = canonicalize ?
 502                 uloc_canonicalize(localeID, fullName, length+1, &err) :
 503                 uloc_getName(localeID, fullName, length+1, &err);
 504         }
 505         if(U_FAILURE(err) || err == U_STRING_NOT_TERMINATED_WARNING) {
 506             /* should never occur */
 507             break;
 508         }
 509
 510         variantBegin = length;
 511
 512         /* after uloc_getName/canonicalize() we know that only '_' are separators */
 513         separator = field[0] = fullName;
 514         fieldIdx = 1;
 515         while ((separator = uprv_strchr(field[fieldIdx-1], SEP_CHAR)) && fieldIdx < (int32_t)(sizeof(field)/sizeof(field[0]))-1) {
 516             field[fieldIdx] = separator + 1;
 517             fieldLen[fieldIdx-1] = (int32_t)(separator - field[fieldIdx-1]);
 518             fieldIdx++;
 519         }
 520         // variant may contain @foo or .foo POSIX cruft; remove it
 521         separator = uprv_strchr(field[fieldIdx-1], '@');
 522         char* sep2 = uprv_strchr(field[fieldIdx-1], '.');
 523         if (separator!=NULL || sep2!=NULL) {
 524             if (separator==NULL || (sep2!=NULL && separator > sep2)) {
 525                 separator = sep2;
 526             }
 527             fieldLen[fieldIdx-1] = (int32_t)(separator - field[fieldIdx-1]);
 528         } else {
 529             fieldLen[fieldIdx-1] = length - (int32_t)(field[fieldIdx-1] - fullName);
 530         }
 531
 532         if (fieldLen[0] >= (int32_t)(sizeof(language)))
 533         {
 534             break; // error: the language field is too long
 535         }
 536
 537         variantField = 1; /* Usually the 2nd one, except when a script or country is also used. */
 538         if (fieldLen[0] > 0) {
 539             /* We have a language */
 540             uprv_memcpy(language, fullName, fieldLen[0]);
 541             language[fieldLen[0]] = 0;
 542         }
 543         if (fieldLen[1] == 4 && ISASCIIALPHA(field[1][0]) &&
 544                 ISASCIIALPHA(field[1][1]) && ISASCIIALPHA(field[1][2]) &&
 545                 ISASCIIALPHA(field[1][3])) {
 546             /* We have at least a script */
 547             uprv_memcpy(script, field[1], fieldLen[1]);
 548             script[fieldLen[1]] = 0;
 549             variantField++;
 550         }
 551
 552         if (fieldLen[variantField] == 2 || fieldLen[variantField] == 3) {
 553             /* We have a country */
 554             uprv_memcpy(country, field[variantField], fieldLen[variantField]);
 555             country[fieldLen[variantField]] = 0;
 556             variantField++;
 557         } else if (fieldLen[variantField] == 0) {
 558             variantField++; /* script or country empty but variant in next field (i.e. en__POSIX) */
 559         }
 560
 561         if (fieldLen[variantField] > 0) {
 562             /* We have a variant */
 563             variantBegin = (int32_t)(field[variantField] - fullName);
 564         }
 565
 566         // successful end of init()
 567         return *this;
 568     } while(0); /*loop doesn't iterate*/
 569
 570     // when an error occurs, then set this object to "bogus" (there is no UErrorCode here)
 571     setToBogus();
 572
 573     return *this;
 574 }
 575
 576 int32_t
 577 Locale::hashCode() const
 578 {
 579     return ustr_hashCharsN(fullName, uprv_strlen(fullName));
 580 }
 581
 582 void
 583 Locale::setToBogus() {
 584     /* Free our current storage */
 585     if(fullName != fullNameBuffer) {
 586         uprv_free(fullName);
 587         fullName = fullNameBuffer;
 588     }
 589     if(baseName && baseName != baseNameBuffer) {
 590         uprv_free(baseName);
 591         baseName = NULL;
 592     }
 593     *fullNameBuffer = 0;
 594     *language = 0;
 595     *script = 0;
 596     *country = 0;
 597     fIsBogus = TRUE;
 598 }
 599
 600 const Locale& U_EXPORT2
 601 Locale::getDefault()
 602 {
 603     {
 604         Mutex lock(&gDefaultLocaleMutex);
 605         if (gDefaultLocale != NULL) {
 606             return *gDefaultLocale;
 607         }
 608     }
 609     UErrorCode status = U_ZERO_ERROR;
 610     return *locale_set_default_internal(NULL, status);
 611 }
 612
 613
 614
 615 void U_EXPORT2
 616 Locale::setDefault( const   Locale&     newLocale,
 617                             UErrorCode&  status)
 618 {
 619     if (U_FAILURE(status)) {
 620         return;
 621     }
 622
 623     /* Set the default from the full name string of the supplied locale.
 624      * This is a convenient way to access the default locale caching mechanisms.
 625      */
 626     const char *localeID = newLocale.getName();
 627     locale_set_default_internal(localeID, status);
 628 }
 629
 630 Locale U_EXPORT2
 631 Locale::createFromName (const char *name)
 632 {
 633     if (name) {
 634         Locale l("");
 635         l.init(name, FALSE);
 636         return l;
 637     }
 638     else {
 639         return getDefault();
 640     }
 641 }
 642
 643 Locale U_EXPORT2
 644 Locale::createCanonical(const char* name) {
 645     Locale loc("");
 646     loc.init(name, TRUE);
 647     return loc;
 648 }
 649
 650 const char *
 651 Locale::getISO3Language() const
 652 {
 653     return uloc_getISO3Language(fullName);
 654 }
 655
 656
 657 const char *
 658 Locale::getISO3Country() const
 659 {
 660     return uloc_getISO3Country(fullName);
 661 }
 662
 663 /**
 664  * Return the LCID value as specified in the "LocaleID" resource for this
 665  * locale.  The LocaleID must be expressed as a hexadecimal number, from
 666  * one to four digits.  If the LocaleID resource is not present, or is
 667  * in an incorrect format, 0 is returned.  The LocaleID is for use in
 668  * Windows (it is an LCID), but is available on all platforms.
 669  */
 670 uint32_t
 671 Locale::getLCID() const
 672 {
 673     return uloc_getLCID(fullName);
 674 }
 675
 676 const char* const* U_EXPORT2 Locale::getISOCountries()
 677 {
 678     return uloc_getISOCountries();
 679 }
 680
 681 const char* const* U_EXPORT2 Locale::getISOLanguages()
 682 {
 683     return uloc_getISOLanguages();
 684 }
 685
 686 // Set the locale's data based on a posix id.
 687 void Locale::setFromPOSIXID(const char *posixID)
 688 {
 689     init(posixID, TRUE);
 690 }
 691
 692 const Locale & U_EXPORT2
 693 Locale::getRoot(void)
 694 {
 695     return getLocale(eROOT);
 696 }
 697
 698 const Locale & U_EXPORT2
 699 Locale::getEnglish(void)
 700 {
 701     return getLocale(eENGLISH);
 702 }
 703
 704 const Locale & U_EXPORT2
 705 Locale::getFrench(void)
 706 {
 707     return getLocale(eFRENCH);
 708 }
 709
 710 const Locale & U_EXPORT2
 711 Locale::getGerman(void)
 712 {
 713     return getLocale(eGERMAN);
 714 }
 715
 716 const Locale & U_EXPORT2
 717 Locale::getItalian(void)
 718 {
 719     return getLocale(eITALIAN);
 720 }
 721
 722 const Locale & U_EXPORT2
 723 Locale::getJapanese(void)
 724 {
 725     return getLocale(eJAPANESE);
 726 }
 727
 728 const Locale & U_EXPORT2
 729 Locale::getKorean(void)
 730 {
 731     return getLocale(eKOREAN);
 732 }
 733
 734 const Locale & U_EXPORT2
 735 Locale::getChinese(void)
 736 {
 737     return getLocale(eCHINESE);
 738 }
 739
 740 const Locale & U_EXPORT2
 741 Locale::getSimplifiedChinese(void)
 742 {
 743     return getLocale(eCHINA);
 744 }
 745
 746 const Locale & U_EXPORT2
 747 Locale::getTraditionalChinese(void)
 748 {
 749     return getLocale(eTAIWAN);
 750 }
 751
 752
 753 const Locale & U_EXPORT2
 754 Locale::getFrance(void)
 755 {
 756     return getLocale(eFRANCE);
 757 }
 758
 759 const Locale & U_EXPORT2
 760 Locale::getGermany(void)
 761 {
 762     return getLocale(eGERMANY);
 763 }
 764
 765 const Locale & U_EXPORT2
 766 Locale::getItaly(void)
 767 {
 768     return getLocale(eITALY);
 769 }
 770
 771 const Locale & U_EXPORT2
 772 Locale::getJapan(void)
 773 {
 774     return getLocale(eJAPAN);
 775 }
 776
 777 const Locale & U_EXPORT2
 778 Locale::getKorea(void)
 779 {
 780     return getLocale(eKOREA);
 781 }
 782
 783 const Locale & U_EXPORT2
 784 Locale::getChina(void)
 785 {
 786     return getLocale(eCHINA);
 787 }
 788
 789 const Locale & U_EXPORT2
 790 Locale::getPRC(void)
 791 {
 792     return getLocale(eCHINA);
 793 }
 794
 795 const Locale & U_EXPORT2
 796 Locale::getTaiwan(void)
 797 {
 798     return getLocale(eTAIWAN);
 799 }
 800
 801 const Locale & U_EXPORT2
 802 Locale::getUK(void)
 803 {
 804     return getLocale(eUK);
 805 }
 806
 807 const Locale & U_EXPORT2
 808 Locale::getUS(void)
 809 {
 810     return getLocale(eUS);
 811 }
 812
 813 const Locale & U_EXPORT2
 814 Locale::getCanada(void)
 815 {
 816     return getLocale(eCANADA);
 817 }
 818
 819 const Locale & U_EXPORT2
 820 Locale::getCanadaFrench(void)
 821 {
 822     return getLocale(eCANADA_FRENCH);
 823 }
 824
 825 const Locale &
 826 Locale::getLocale(int locid)
 827 {
 828     Locale *localeCache = getLocaleCache();
 829     U_ASSERT((locid < eMAX_LOCALES)&&(locid>=0));
 830     if (localeCache == NULL) {
 831         // Failure allocating the locale cache.
 832         //   The best we can do is return a NULL reference.
 833         locid = 0;
 834     }
 835     return localeCache[locid]; /*operating on NULL*/
 836 }
 837
 838 /*
 839 This function is defined this way in order to get around static
 840 initialization and static destruction.
 841  */
 842 Locale *
 843 Locale::getLocaleCache(void)
 844 {
 845     umtx_lock(NULL);
 846     UBool needInit = (gLocaleCache == NULL);
 847     umtx_unlock(NULL);
 848
 849     if (needInit) {
 850         Locale *tLocaleCache = new Locale[(int)eMAX_LOCALES];
 851         if (tLocaleCache == NULL) {
 852             return NULL;
 853         }
 854         tLocaleCache[eROOT]          = Locale("");
 855         tLocaleCache[eENGLISH]       = Locale("en");
 856         tLocaleCache[eFRENCH]        = Locale("fr");
 857         tLocaleCache[eGERMAN]        = Locale("de");
 858         tLocaleCache[eITALIAN]       = Locale("it");
 859         tLocaleCache[eJAPANESE]      = Locale("ja");
 860         tLocaleCache[eKOREAN]        = Locale("ko");
 861         tLocaleCache[eCHINESE]       = Locale("zh");
 862         tLocaleCache[eFRANCE]        = Locale("fr", "FR");
 863         tLocaleCache[eGERMANY]       = Locale("de", "DE");
 864         tLocaleCache[eITALY]         = Locale("it", "IT");
 865         tLocaleCache[eJAPAN]         = Locale("ja", "JP");
 866         tLocaleCache[eKOREA]         = Locale("ko", "KR");
 867         tLocaleCache[eCHINA]         = Locale("zh", "CN");
 868         tLocaleCache[eTAIWAN]        = Locale("zh", "TW");
 869         tLocaleCache[eUK]            = Locale("en", "GB");
 870         tLocaleCache[eUS]            = Locale("en", "US");
 871         tLocaleCache[eCANADA]        = Locale("en", "CA");
 872         tLocaleCache[eCANADA_FRENCH] = Locale("fr", "CA");
 873
 874         umtx_lock(NULL);
 875         if (gLocaleCache == NULL) {
 876             gLocaleCache = tLocaleCache;
 877             tLocaleCache = NULL;
 878             ucln_common_registerCleanup(UCLN_COMMON_LOCALE, locale_cleanup);
 879         }
 880         umtx_unlock(NULL);
 881         if (tLocaleCache) {
 882             delete [] tLocaleCache;  // Fancy array delete will destruct each member.
 883         }
 884     }
 885     return gLocaleCache;
 886 }
 887
 888 class KeywordEnumeration : public StringEnumeration {
 889 private:
 890     char *keywords;
 891     char *current;
 892     int32_t length;
 893     UnicodeString currUSKey;
 894     static const char fgClassID;/* Warning this is used beyond the typical RTTI usage. */
 895
 896 public:
 897     static UClassID U_EXPORT2 getStaticClassID(void) { return (UClassID)&fgClassID; }
 898     virtual UClassID getDynamicClassID(void) const { return getStaticClassID(); }
 899 public:
 900     KeywordEnumeration(const char *keys, int32_t keywordLen, int32_t currentIndex, UErrorCode &status)
 901         : keywords((char *)&fgClassID), current((char *)&fgClassID), length(0) {
 902         if(U_SUCCESS(status) && keywordLen != 0) {
 903             if(keys == NULL || keywordLen < 0) {
 904                 status = U_ILLEGAL_ARGUMENT_ERROR;
 905             } else {
 906                 keywords = (char *)uprv_malloc(keywordLen+1);
 907                 if (keywords == NULL) {
 908                     status = U_MEMORY_ALLOCATION_ERROR;
 909                 }
 910                 else {
 911                     uprv_memcpy(keywords, keys, keywordLen);
 912                     keywords[keywordLen] = 0;
 913                     current = keywords + currentIndex;
 914                     length = keywordLen;
 915                 }
 916             }
 917         }
 918     }
 919
 920     virtual ~KeywordEnumeration();
 921
 922     virtual StringEnumeration * clone() const
 923     {
 924         UErrorCode status = U_ZERO_ERROR;
 925         return new KeywordEnumeration(keywords, length, (int32_t)(current - keywords), status);
 926     }
 927
 928     virtual int32_t count(UErrorCode &/*status*/) const {
 929         char *kw = keywords;
 930         int32_t result = 0;
 931         while(*kw) {
 932             result++;
 933             kw += uprv_strlen(kw)+1;
 934         }
 935         return result;
 936     }
 937
 938     virtual const char* next(int32_t* resultLength, UErrorCode& status) {
 939         const char* result;
 940         int32_t len;
 941         if(U_SUCCESS(status) && *current != 0) {
 942             result = current;
 943             len = (int32_t)uprv_strlen(current);
 944             current += len+1;
 945             if(resultLength != NULL) {
 946                 *resultLength = len;
 947             }
 948         } else {
 949             if(resultLength != NULL) {
 950                 *resultLength = 0;
 951             }
 952             result = NULL;
 953         }
 954         return result;
 955     }
 956
 957     virtual const UnicodeString* snext(UErrorCode& status) {
 958         int32_t resultLength = 0;
 959         const char *s = next(&resultLength, status);
 960         return setChars(s, resultLength, status);
 961     }
 962
 963     virtual void reset(UErrorCode& /*status*/) {
 964         current = keywords;
 965     }
 966 };
 967
 968 const char KeywordEnumeration::fgClassID = '\0';
 969
 970 KeywordEnumeration::~KeywordEnumeration() {
 971     uprv_free(keywords);
 972 }
 973
 974 StringEnumeration *
 975 Locale::createKeywords(UErrorCode &status) const
 976 {
 977     char keywords[256];
 978     int32_t keywordCapacity = 256;
 979     StringEnumeration *result = NULL;
 980
 981     const char* variantStart = uprv_strchr(fullName, '@');
 982     const char* assignment = uprv_strchr(fullName, '=');
 983     if(variantStart) {
 984         if(assignment > variantStart) {
 985             int32_t keyLen = locale_getKeywords(variantStart+1, '@', keywords, keywordCapacity, NULL, 0, NULL, FALSE, &status);
 986             if(keyLen) {
 987                 result = new KeywordEnumeration(keywords, keyLen, 0, status);
 988             }
 989         } else {
 990             status = U_INVALID_FORMAT_ERROR;
 991         }
 992     }
 993     return result;
 994 }
 995
 996 int32_t
 997 Locale::getKeywordValue(const char* keywordName, char *buffer, int32_t bufLen, UErrorCode &status) const
 998 {
 999     return uloc_getKeywordValue(fullName, keywordName, buffer, bufLen, &status);
1000 }
1001
1002 void
1003 Locale::setKeywordValue(const char* keywordName, const char* keywordValue, UErrorCode &status)
1004 {
1005     uloc_setKeywordValue(keywordName, keywordValue, fullName, ULOC_FULLNAME_CAPACITY, &status);
1006 }
1007
1008 const char *
1009 Locale::getBaseName() const
1010 {
1011     // lazy init
1012     UErrorCode status = U_ZERO_ERROR;
1013     // semantically const
1014     if(baseName == 0) {
1015         ((Locale *)this)->baseName = ((Locale *)this)->baseNameBuffer;
1016         int32_t baseNameSize = uloc_getBaseName(fullName, baseName, ULOC_FULLNAME_CAPACITY, &status);
1017         if(baseNameSize >= ULOC_FULLNAME_CAPACITY) {
1018             ((Locale *)this)->baseName = (char *)uprv_malloc(sizeof(char) * baseNameSize + 1);
1019             if (baseName == NULL) {
1020                 return baseName;
1021             }
1022             uloc_getBaseName(fullName, baseName, baseNameSize+1, &status);
1023         }
1024         baseName[baseNameSize] = 0;
1025
1026         // the computation of variantBegin leaves it equal to the length
1027         // of fullName if there is no variant.  It should instead be
1028         // the length of the baseName.  Patch around this for now.
1029         if (variantBegin == (int32_t)uprv_strlen(fullName)) {
1030           ((Locale*)this)->variantBegin = baseNameSize;
1031         }
1032     }
1033     return baseName;
1034 }
1035
1036 //eof
1037 U_NAMESPACE_END