source/common/locdispnames.cpp

   1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 *******************************************************************************
   5 *
   6 *   Copyright (C) 1997-2016, International Business Machines
   7 *   Corporation and others.  All Rights Reserved.
   8 *
   9 *******************************************************************************
  10 *   file name:  locdispnames.cpp
  11 *   encoding:   US-ASCII
  12 *   tab size:   8 (not used)
  13 *   indentation:4
  14 *
  15 *   created on: 2010feb25
  16 *   created by: Markus W. Scherer
  17 *
  18 *   Code for locale display names, separated out from other .cpp files
  19 *   that then do not depend on resource bundle code and display name data.
  20 */
  21
  22 #include "unicode/utypes.h"
  23 #include "unicode/brkiter.h"
  24 #include "unicode/locid.h"
  25 #include "unicode/uloc.h"
  26 #include "unicode/ures.h"
  27 #include "unicode/ustring.h"
  28 #include "cmemory.h"
  29 #include "cstring.h"
  30 #include "putilimp.h"
  31 #include "ulocimp.h"
  32 #include "uresimp.h"
  33 #include "ureslocs.h"
  34 #include "ustr_imp.h"
  35
  36 // C++ API ----------------------------------------------------------------- ***
  37
  38 U_NAMESPACE_BEGIN
  39
  40 UnicodeString&
  41 Locale::getDisplayLanguage(UnicodeString& dispLang) const
  42 {
  43     return this->getDisplayLanguage(getDefault(), dispLang);
  44 }
  45
  46 /*We cannot make any assumptions on the size of the output display strings
  47 * Yet, since we are calling through to a C API, we need to set limits on
  48 * buffer size. For all the following getDisplay functions we first attempt
  49 * to fill up a stack allocated buffer. If it is to small we heap allocated
  50 * the exact buffer we need copy it to the UnicodeString and delete it*/
  51
  52 UnicodeString&
  53 Locale::getDisplayLanguage(const Locale &displayLocale,
  54                            UnicodeString &result) const {
  55     UChar *buffer;
  56     UErrorCode errorCode=U_ZERO_ERROR;
  57     int32_t length;
  58
  59     buffer=result.getBuffer(ULOC_FULLNAME_CAPACITY);
  60     if(buffer==0) {
  61         result.truncate(0);
  62         return result;
  63     }
  64
  65     length=uloc_getDisplayLanguage(fullName, displayLocale.fullName,
  66                                    buffer, result.getCapacity(),
  67                                    &errorCode);
  68     result.releaseBuffer(U_SUCCESS(errorCode) ? length : 0);
  69
  70     if(errorCode==U_BUFFER_OVERFLOW_ERROR) {
  71         buffer=result.getBuffer(length);
  72         if(buffer==0) {
  73             result.truncate(0);
  74             return result;
  75         }
  76         errorCode=U_ZERO_ERROR;
  77         length=uloc_getDisplayLanguage(fullName, displayLocale.fullName,
  78                                        buffer, result.getCapacity(),
  79                                        &errorCode);
  80         result.releaseBuffer(U_SUCCESS(errorCode) ? length : 0);
  81     }
  82
  83     return result;
  84 }
  85
  86 UnicodeString&
  87 Locale::getDisplayScript(UnicodeString& dispScript) const
  88 {
  89     return this->getDisplayScript(getDefault(), dispScript);
  90 }
  91
  92 UnicodeString&
  93 Locale::getDisplayScript(const Locale &displayLocale,
  94                           UnicodeString &result) const {
  95     UChar *buffer;
  96     UErrorCode errorCode=U_ZERO_ERROR;
  97     int32_t length;
  98
  99     buffer=result.getBuffer(ULOC_FULLNAME_CAPACITY);
 100     if(buffer==0) {
 101         result.truncate(0);
 102         return result;
 103     }
 104
 105     length=uloc_getDisplayScript(fullName, displayLocale.fullName,
 106                                   buffer, result.getCapacity(),
 107                                   &errorCode);
 108     result.releaseBuffer(U_SUCCESS(errorCode) ? length : 0);
 109
 110     if(errorCode==U_BUFFER_OVERFLOW_ERROR) {
 111         buffer=result.getBuffer(length);
 112         if(buffer==0) {
 113             result.truncate(0);
 114             return result;
 115         }
 116         errorCode=U_ZERO_ERROR;
 117         length=uloc_getDisplayScript(fullName, displayLocale.fullName,
 118                                       buffer, result.getCapacity(),
 119                                       &errorCode);
 120         result.releaseBuffer(U_SUCCESS(errorCode) ? length : 0);
 121     }
 122
 123     return result;
 124 }
 125
 126 UnicodeString&
 127 Locale::getDisplayCountry(UnicodeString& dispCntry) const
 128 {
 129     return this->getDisplayCountry(getDefault(), dispCntry);
 130 }
 131
 132 UnicodeString&
 133 Locale::getDisplayCountry(const Locale &displayLocale,
 134                           UnicodeString &result) const {
 135     UChar *buffer;
 136     UErrorCode errorCode=U_ZERO_ERROR;
 137     int32_t length;
 138
 139     buffer=result.getBuffer(ULOC_FULLNAME_CAPACITY);
 140     if(buffer==0) {
 141         result.truncate(0);
 142         return result;
 143     }
 144
 145     length=uloc_getDisplayCountry(fullName, displayLocale.fullName,
 146                                   buffer, result.getCapacity(),
 147                                   &errorCode);
 148     result.releaseBuffer(U_SUCCESS(errorCode) ? length : 0);
 149
 150     if(errorCode==U_BUFFER_OVERFLOW_ERROR) {
 151         buffer=result.getBuffer(length);
 152         if(buffer==0) {
 153             result.truncate(0);
 154             return result;
 155         }
 156         errorCode=U_ZERO_ERROR;
 157         length=uloc_getDisplayCountry(fullName, displayLocale.fullName,
 158                                       buffer, result.getCapacity(),
 159                                       &errorCode);
 160         result.releaseBuffer(U_SUCCESS(errorCode) ? length : 0);
 161     }
 162
 163     return result;
 164 }
 165
 166 UnicodeString&
 167 Locale::getDisplayVariant(UnicodeString& dispVar) const
 168 {
 169     return this->getDisplayVariant(getDefault(), dispVar);
 170 }
 171
 172 UnicodeString&
 173 Locale::getDisplayVariant(const Locale &displayLocale,
 174                           UnicodeString &result) const {
 175     UChar *buffer;
 176     UErrorCode errorCode=U_ZERO_ERROR;
 177     int32_t length;
 178
 179     buffer=result.getBuffer(ULOC_FULLNAME_CAPACITY);
 180     if(buffer==0) {
 181         result.truncate(0);
 182         return result;
 183     }
 184
 185     length=uloc_getDisplayVariant(fullName, displayLocale.fullName,
 186                                   buffer, result.getCapacity(),
 187                                   &errorCode);
 188     result.releaseBuffer(U_SUCCESS(errorCode) ? length : 0);
 189
 190     if(errorCode==U_BUFFER_OVERFLOW_ERROR) {
 191         buffer=result.getBuffer(length);
 192         if(buffer==0) {
 193             result.truncate(0);
 194             return result;
 195         }
 196         errorCode=U_ZERO_ERROR;
 197         length=uloc_getDisplayVariant(fullName, displayLocale.fullName,
 198                                       buffer, result.getCapacity(),
 199                                       &errorCode);
 200         result.releaseBuffer(U_SUCCESS(errorCode) ? length : 0);
 201     }
 202
 203     return result;
 204 }
 205
 206 UnicodeString&
 207 Locale::getDisplayName( UnicodeString& name ) const
 208 {
 209     return this->getDisplayName(getDefault(), name);
 210 }
 211
 212 UnicodeString&
 213 Locale::getDisplayName(const Locale &displayLocale,
 214                        UnicodeString &result) const {
 215     UChar *buffer;
 216     UErrorCode errorCode=U_ZERO_ERROR;
 217     int32_t length;
 218
 219     buffer=result.getBuffer(ULOC_FULLNAME_CAPACITY);
 220     if(buffer==0) {
 221         result.truncate(0);
 222         return result;
 223     }
 224
 225     length=uloc_getDisplayName(fullName, displayLocale.fullName,
 226                                buffer, result.getCapacity(),
 227                                &errorCode);
 228     result.releaseBuffer(U_SUCCESS(errorCode) ? length : 0);
 229
 230     if(errorCode==U_BUFFER_OVERFLOW_ERROR) {
 231         buffer=result.getBuffer(length);
 232         if(buffer==0) {
 233             result.truncate(0);
 234             return result;
 235         }
 236         errorCode=U_ZERO_ERROR;
 237         length=uloc_getDisplayName(fullName, displayLocale.fullName,
 238                                    buffer, result.getCapacity(),
 239                                    &errorCode);
 240         result.releaseBuffer(U_SUCCESS(errorCode) ? length : 0);
 241     }
 242
 243     return result;
 244 }
 245
 246 #if ! UCONFIG_NO_BREAK_ITERATION
 247
 248 // -------------------------------------
 249 // Gets the objectLocale display name in the default locale language.
 250 UnicodeString& U_EXPORT2
 251 BreakIterator::getDisplayName(const Locale& objectLocale,
 252                              UnicodeString& name)
 253 {
 254     return objectLocale.getDisplayName(name);
 255 }
 256
 257 // -------------------------------------
 258 // Gets the objectLocale display name in the displayLocale language.
 259 UnicodeString& U_EXPORT2
 260 BreakIterator::getDisplayName(const Locale& objectLocale,
 261                              const Locale& displayLocale,
 262                              UnicodeString& name)
 263 {
 264     return objectLocale.getDisplayName(displayLocale, name);
 265 }
 266
 267 #endif
 268
 269
 270 U_NAMESPACE_END
 271
 272 // C API ------------------------------------------------------------------- ***
 273
 274 U_NAMESPACE_USE
 275
 276 /* ### Constants **************************************************/
 277
 278 /* These strings describe the resources we attempt to load from
 279  the locale ResourceBundle data file.*/
 280 static const char _kLanguages[]       = "Languages";
 281 static const char _kScripts[]         = "Scripts";
 282 static const char _kScriptsStandAlone[] = "Scripts%stand-alone";
 283 static const char _kCountries[]       = "Countries";
 284 static const char _kVariants[]        = "Variants";
 285 static const char _kKeys[]            = "Keys";
 286 static const char _kTypes[]           = "Types";
 287 //static const char _kRootName[]        = "root";
 288 static const char _kCurrency[]        = "currency";
 289 static const char _kCurrencies[]      = "Currencies";
 290 static const char _kLocaleDisplayPattern[] = "localeDisplayPattern";
 291 static const char _kPattern[]         = "pattern";
 292 static const char _kSeparator[]       = "separator";
 293
 294 /* ### Display name **************************************************/
 295
 296 static int32_t
 297 _getStringOrCopyKey(const char *path, const char *locale,
 298                     const char *tableKey,
 299                     const char* subTableKey,
 300                     const char *itemKey,
 301                     const char *substitute,
 302                     UChar *dest, int32_t destCapacity,
 303                     UErrorCode *pErrorCode) {
 304     const UChar *s = NULL;
 305     int32_t length = 0;
 306
 307     if(itemKey==NULL) {
 308         /* top-level item: normal resource bundle access */
 309         UResourceBundle *rb;
 310
 311         rb=ures_open(path, locale, pErrorCode);
 312
 313         if(U_SUCCESS(*pErrorCode)) {
 314             s=ures_getStringByKey(rb, tableKey, &length, pErrorCode);
 315             /* see comment about closing rb near "return item;" in _res_getTableStringWithFallback() */
 316             ures_close(rb);
 317         }
 318     } else {
 319         /* Language code should not be a number. If it is, set the error code. */
 320         if (!uprv_strncmp(tableKey, "Languages", 9) && uprv_strtol(itemKey, NULL, 10)) {
 321             *pErrorCode = U_MISSING_RESOURCE_ERROR;
 322         } else {
 323             /* second-level item, use special fallback */
 324             s=uloc_getTableStringWithFallback(path, locale,
 325                                                tableKey,
 326                                                subTableKey,
 327                                                itemKey,
 328                                                &length,
 329                                                pErrorCode);
 330         }
 331     }
 332
 333     if(U_SUCCESS(*pErrorCode)) {
 334         int32_t copyLength=uprv_min(length, destCapacity);
 335         if(copyLength>0 && s != NULL) {
 336             u_memcpy(dest, s, copyLength);
 337         }
 338     } else {
 339         /* no string from a resource bundle: convert the substitute */
 340         length=(int32_t)uprv_strlen(substitute);
 341         u_charsToUChars(substitute, dest, uprv_min(length, destCapacity));
 342         *pErrorCode=U_USING_DEFAULT_WARNING;
 343     }
 344
 345     return u_terminateUChars(dest, destCapacity, length, pErrorCode);
 346 }
 347
 348 typedef  int32_t U_CALLCONV UDisplayNameGetter(const char *, char *, int32_t, UErrorCode *);
 349
 350 static int32_t
 351 _getDisplayNameForComponent(const char *locale,
 352                             const char *displayLocale,
 353                             UChar *dest, int32_t destCapacity,
 354                             UDisplayNameGetter *getter,
 355                             const char *tag,
 356                             UErrorCode *pErrorCode) {
 357     char localeBuffer[ULOC_FULLNAME_CAPACITY*4];
 358     int32_t length;
 359     UErrorCode localStatus;
 360     const char* root = NULL;
 361
 362     /* argument checking */
 363     if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
 364         return 0;
 365     }
 366
 367     if(destCapacity<0 || (destCapacity>0 && dest==NULL)) {
 368         *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
 369         return 0;
 370     }
 371
 372     localStatus = U_ZERO_ERROR;
 373     length=(*getter)(locale, localeBuffer, sizeof(localeBuffer), &localStatus);
 374     if(U_FAILURE(localStatus) || localStatus==U_STRING_NOT_TERMINATED_WARNING) {
 375         *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
 376         return 0;
 377     }
 378     if(length==0) {
 379         return u_terminateUChars(dest, destCapacity, 0, pErrorCode);
 380     }
 381
 382     root = tag == _kCountries ? U_ICUDATA_REGION : U_ICUDATA_LANG;
 383
 384     return _getStringOrCopyKey(root, displayLocale,
 385                                tag, NULL, localeBuffer,
 386                                localeBuffer,
 387                                dest, destCapacity,
 388                                pErrorCode);
 389 }
 390
 391 U_CAPI int32_t U_EXPORT2
 392 uloc_getDisplayLanguage(const char *locale,
 393                         const char *displayLocale,
 394                         UChar *dest, int32_t destCapacity,
 395                         UErrorCode *pErrorCode) {
 396     return _getDisplayNameForComponent(locale, displayLocale, dest, destCapacity,
 397                 uloc_getLanguage, _kLanguages, pErrorCode);
 398 }
 399
 400 U_CAPI int32_t U_EXPORT2
 401 uloc_getDisplayScript(const char* locale,
 402                       const char* displayLocale,
 403                       UChar *dest, int32_t destCapacity,
 404                       UErrorCode *pErrorCode)
 405 {
 406         UErrorCode err = U_ZERO_ERROR;
 407         int32_t res = _getDisplayNameForComponent(locale, displayLocale, dest, destCapacity,
 408                 uloc_getScript, _kScriptsStandAlone, &err);
 409
 410         if ( err == U_USING_DEFAULT_WARNING ) {
 411         return _getDisplayNameForComponent(locale, displayLocale, dest, destCapacity,
 412                     uloc_getScript, _kScripts, pErrorCode);
 413         } else {
 414                 *pErrorCode = err;
 415                 return res;
 416         }
 417 }
 418
 419 U_INTERNAL int32_t U_EXPORT2
 420 uloc_getDisplayScriptInContext(const char* locale,
 421                       const char* displayLocale,
 422                       UChar *dest, int32_t destCapacity,
 423                       UErrorCode *pErrorCode)
 424 {
 425     return _getDisplayNameForComponent(locale, displayLocale, dest, destCapacity,
 426                     uloc_getScript, _kScripts, pErrorCode);
 427 }
 428
 429 U_CAPI int32_t U_EXPORT2
 430 uloc_getDisplayCountry(const char *locale,
 431                        const char *displayLocale,
 432                        UChar *dest, int32_t destCapacity,
 433                        UErrorCode *pErrorCode) {
 434     return _getDisplayNameForComponent(locale, displayLocale, dest, destCapacity,
 435                 uloc_getCountry, _kCountries, pErrorCode);
 436 }
 437
 438 /*
 439  * TODO separate variant1_variant2_variant3...
 440  * by getting each tag's display string and concatenating them with ", "
 441  * in between - similar to uloc_getDisplayName()
 442  */
 443 U_CAPI int32_t U_EXPORT2
 444 uloc_getDisplayVariant(const char *locale,
 445                        const char *displayLocale,
 446                        UChar *dest, int32_t destCapacity,
 447                        UErrorCode *pErrorCode) {
 448     return _getDisplayNameForComponent(locale, displayLocale, dest, destCapacity,
 449                 uloc_getVariant, _kVariants, pErrorCode);
 450 }
 451
 452 /* Instead of having a separate pass for 'special' patterns, reintegrate the two
 453  * so we don't get bitten by preflight bugs again.  We can be reasonably efficient
 454  * without two separate code paths, this code isn't that performance-critical.
 455  *
 456  * This code is general enough to deal with patterns that have a prefix or swap the
 457  * language and remainder components, since we gave developers enough rope to do such
 458  * things if they futz with the pattern data.  But since we don't give them a way to
 459  * specify a pattern for arbitrary combinations of components, there's not much use in
 460  * that.  I don't think our data includes such patterns, the only variable I know if is
 461  * whether there is a space before the open paren, or not.  Oh, and zh uses different
 462  * chars than the standard open/close paren (which ja and ko use, btw).
 463  */
 464 U_CAPI int32_t U_EXPORT2
 465 uloc_getDisplayName(const char *locale,
 466                     const char *displayLocale,
 467                     UChar *dest, int32_t destCapacity,
 468                     UErrorCode *pErrorCode)
 469 {
 470     static const UChar defaultSeparator[9] = { 0x007b, 0x0030, 0x007d, 0x002c, 0x0020, 0x007b, 0x0031, 0x007d, 0x0000 }; /* "{0}, {1}" */
 471     static const UChar sub0[4] = { 0x007b, 0x0030, 0x007d , 0x0000 } ; /* {0} */
 472     static const UChar sub1[4] = { 0x007b, 0x0031, 0x007d , 0x0000 } ; /* {1} */
 473     static const int32_t subLen = 3;
 474     static const UChar defaultPattern[10] = {
 475         0x007b, 0x0030, 0x007d, 0x0020, 0x0028, 0x007b, 0x0031, 0x007d, 0x0029, 0x0000
 476     }; /* {0} ({1}) */
 477     static const int32_t defaultPatLen = 9;
 478     static const int32_t defaultSub0Pos = 0;
 479     static const int32_t defaultSub1Pos = 5;
 480
 481     int32_t length; /* of formatted result */
 482
 483     const UChar *separator;
 484     int32_t sepLen = 0;
 485     const UChar *pattern;
 486     int32_t patLen = 0;
 487     int32_t sub0Pos, sub1Pos;
 488
 489     UChar formatOpenParen         = 0x0028; // (
 490     UChar formatReplaceOpenParen  = 0x005B; // [
 491     UChar formatCloseParen        = 0x0029; // )
 492     UChar formatReplaceCloseParen = 0x005D; // ]
 493
 494     UBool haveLang = TRUE; /* assume true, set false if we find we don't have
 495                               a lang component in the locale */
 496     UBool haveRest = TRUE; /* assume true, set false if we find we don't have
 497                               any other component in the locale */
 498     UBool retry = FALSE; /* set true if we need to retry, see below */
 499
 500     int32_t langi = 0; /* index of the language substitution (0 or 1), virtually always 0 */
 501
 502     if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
 503         return 0;
 504     }
 505
 506     if(destCapacity<0 || (destCapacity>0 && dest==NULL)) {
 507         *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
 508         return 0;
 509     }
 510
 511     {
 512         UErrorCode status = U_ZERO_ERROR;
 513         UResourceBundle* locbundle=ures_open(U_ICUDATA_LANG, displayLocale, &status);
 514         UResourceBundle* dspbundle=ures_getByKeyWithFallback(locbundle, _kLocaleDisplayPattern,
 515                                                              NULL, &status);
 516
 517         separator=ures_getStringByKeyWithFallback(dspbundle, _kSeparator, &sepLen, &status);
 518         pattern=ures_getStringByKeyWithFallback(dspbundle, _kPattern, &patLen, &status);
 519
 520         ures_close(dspbundle);
 521         ures_close(locbundle);
 522     }
 523
 524     /* If we couldn't find any data, then use the defaults */
 525     if(sepLen == 0) {
 526        separator = defaultSeparator;
 527     }
 528     /* #10244: Even though separator is now a pattern, it is awkward to handle it as such
 529      * here since we are trying to build the display string in place in the dest buffer,
 530      * and to handle it as a pattern would entail having separate storage for the
 531      * substrings that need to be combined (the first of which may be the result of
 532      * previous such combinations). So for now we continue to treat the portion between
 533      * {0} and {1} as a string to be appended when joining substrings, ignoring anything
 534      * that is before {0} or after {1} (no existing separator pattern has any such thing).
 535      * This is similar to how pattern is handled below.
 536      */
 537     {
 538         UChar *p0=u_strstr(separator, sub0);
 539         UChar *p1=u_strstr(separator, sub1);
 540         if (p0==NULL || p1==NULL || p1<p0) {
 541             *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
 542             return 0;
 543         }
 544         separator = (const UChar *)p0 + subLen;
 545         sepLen = p1 - separator;
 546     }
 547
 548     if(patLen==0 || (patLen==defaultPatLen && !u_strncmp(pattern, defaultPattern, patLen))) {
 549         pattern=defaultPattern;
 550         patLen=defaultPatLen;
 551         sub0Pos=defaultSub0Pos;
 552         sub1Pos=defaultSub1Pos;
 553         // use default formatOpenParen etc. set above
 554     } else { /* non-default pattern */
 555         UChar *p0=u_strstr(pattern, sub0);
 556         UChar *p1=u_strstr(pattern, sub1);
 557         if (p0==NULL || p1==NULL) {
 558             *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
 559             return 0;
 560         }
 561         sub0Pos=p0-pattern;
 562         sub1Pos=p1-pattern;
 563         if (sub1Pos < sub0Pos) { /* a very odd pattern */
 564             int32_t t=sub0Pos; sub0Pos=sub1Pos; sub1Pos=t;
 565             langi=1;
 566         }
 567         if (u_strchr(pattern, 0xFF08) != NULL) {
 568             formatOpenParen         = 0xFF08; // fullwidth (
 569             formatReplaceOpenParen  = 0xFF3B; // fullwidth [
 570             formatCloseParen        = 0xFF09; // fullwidth )
 571             formatReplaceCloseParen = 0xFF3D; // fullwidth ]
 572         }
 573     }
 574
 575     /* We loop here because there is one case in which after the first pass we could need to
 576      * reextract the data.  If there's initial padding before the first element, we put in
 577      * the padding and then write that element.  If it turns out there's no second element,
 578      * we didn't need the padding.  If we do need the data (no preflight), and the first element
 579      * would have fit but for the padding, we need to reextract.  In this case (only) we
 580      * adjust the parameters so padding is not added, and repeat.
 581      */
 582     do {
 583         UChar* p=dest;
 584         int32_t patPos=0; /* position in the pattern, used for non-substitution portions */
 585         int32_t langLen=0; /* length of language substitution */
 586         int32_t langPos=0; /* position in output of language substitution */
 587         int32_t restLen=0; /* length of 'everything else' substitution */
 588         int32_t restPos=0; /* position in output of 'everything else' substitution */
 589         UEnumeration* kenum = NULL; /* keyword enumeration */
 590
 591         /* prefix of pattern, extremely likely to be empty */
 592         if(sub0Pos) {
 593             if(destCapacity >= sub0Pos) {
 594                 while (patPos < sub0Pos) {
 595                     *p++ = pattern[patPos++];
 596                 }
 597             } else {
 598                 patPos=sub0Pos;
 599             }
 600             length=sub0Pos;
 601         } else {
 602             length=0;
 603         }
 604
 605         for(int32_t subi=0,resti=0;subi<2;) { /* iterate through patterns 0 and 1*/
 606             UBool subdone = FALSE; /* set true when ready to move to next substitution */
 607
 608             /* prep p and cap for calls to get display components, pin cap to 0 since
 609                they complain if cap is negative */
 610             int32_t cap=destCapacity-length;
 611             if (cap <= 0) {
 612                 cap=0;
 613             } else {
 614                 p=dest+length;
 615             }
 616
 617             if (subi == langi) { /* {0}*/
 618                 if(haveLang) {
 619                     langPos=length;
 620                     langLen=uloc_getDisplayLanguage(locale, displayLocale, p, cap, pErrorCode);
 621                     length+=langLen;
 622                     haveLang=langLen>0;
 623                 }
 624                 subdone=TRUE;
 625             } else { /* {1} */
 626                 if(!haveRest) {
 627                     subdone=TRUE;
 628                 } else {
 629                     int32_t len; /* length of component (plus other stuff) we just fetched */
 630                     switch(resti++) {
 631                         case 0:
 632                             restPos=length;
 633                             len=uloc_getDisplayScriptInContext(locale, displayLocale, p, cap, pErrorCode);
 634                             break;
 635                         case 1:
 636                             len=uloc_getDisplayCountry(locale, displayLocale, p, cap, pErrorCode);
 637                             break;
 638                         case 2:
 639                             len=uloc_getDisplayVariant(locale, displayLocale, p, cap, pErrorCode);
 640                             break;
 641                         case 3:
 642                             kenum = uloc_openKeywords(locale, pErrorCode);
 643                             U_FALLTHROUGH;
 644                         default: {
 645                             const char* kw=uenum_next(kenum, &len, pErrorCode);
 646                             if (kw == NULL) {
 647                                 uenum_close(kenum);
 648                                 len=0; /* mark that we didn't add a component */
 649                                 subdone=TRUE;
 650                             } else {
 651                                 /* incorporating this behavior into the loop made it even more complex,
 652                                    so just special case it here */
 653                                 len = uloc_getDisplayKeyword(kw, displayLocale, p, cap, pErrorCode);
 654                                 if(len) {
 655                                     if(len < cap) {
 656                                         p[len]=0x3d; /* '=', assume we'll need it */
 657                                     }
 658                                     len+=1;
 659
 660                                     /* adjust for call to get keyword */
 661                                     cap-=len;
 662                                     if(cap <= 0) {
 663                                         cap=0;
 664                                     } else {
 665                                         p+=len;
 666                                     }
 667                                 }
 668                                 /* reset for call below */
 669                                 if(*pErrorCode == U_BUFFER_OVERFLOW_ERROR) {
 670                                     *pErrorCode=U_ZERO_ERROR;
 671                                 }
 672                                 int32_t vlen = uloc_getDisplayKeywordValue(locale, kw, displayLocale,
 673                                                                            p, cap, pErrorCode);
 674                                 if(len) {
 675                                     if(vlen==0) {
 676                                         --len; /* remove unneeded '=' */
 677                                     }
 678                                     /* restore cap and p to what they were at start */
 679                                     cap=destCapacity-length;
 680                                     if(cap <= 0) {
 681                                         cap=0;
 682                                     } else {
 683                                         p=dest+length;
 684                                     }
 685                                 }
 686                                 len+=vlen; /* total we added for key + '=' + value */
 687                             }
 688                         } break;
 689                     } /* end switch */
 690
 691                     if (len>0) {
 692                         /* we addeed a component, so add separator and write it if there's room. */
 693                         if(len+sepLen<=cap) {
 694                             const UChar * plimit = p + len;
 695                             for (; p < plimit; p++) {
 696                                 if (*p == formatOpenParen) {
 697                                     *p = formatReplaceOpenParen;
 698                                 } else if (*p == formatCloseParen) {
 699                                     *p = formatReplaceCloseParen;
 700                                 }
 701                             }
 702                             for(int32_t i=0;i<sepLen;++i) {
 703                                 *p++=separator[i];
 704                             }
 705                         }
 706                         length+=len+sepLen;
 707                     } else if(subdone) {
 708                         /* remove separator if we added it */
 709                         if (length!=restPos) {
 710                             length-=sepLen;
 711                         }
 712                         restLen=length-restPos;
 713                         haveRest=restLen>0;
 714                     }
 715                 }
 716             }
 717
 718             if(*pErrorCode == U_BUFFER_OVERFLOW_ERROR) {
 719                 *pErrorCode=U_ZERO_ERROR;
 720             }
 721
 722             if(subdone) {
 723                 if(haveLang && haveRest) {
 724                     /* append internal portion of pattern, the first time,
 725                        or last portion of pattern the second time */
 726                     int32_t padLen;
 727                     patPos+=subLen;
 728                     padLen=(subi==0 ? sub1Pos : patLen)-patPos;
 729                     if(length+padLen < destCapacity) {
 730                         p=dest+length;
 731                         for(int32_t i=0;i<padLen;++i) {
 732                             *p++=pattern[patPos++];
 733                         }
 734                     } else {
 735                         patPos+=padLen;
 736                     }
 737                     length+=padLen;
 738                 } else if(subi==0) {
 739                     /* don't have first component, reset for second component */
 740                     sub0Pos=0;
 741                     length=0;
 742                 } else if(length>0) {
 743                     /* true length is the length of just the component we got. */
 744                     length=haveLang?langLen:restLen;
 745                     if(dest && sub0Pos!=0) {
 746                         if (sub0Pos+length<=destCapacity) {
 747                             /* first component not at start of result,
 748                                but we have full component in buffer. */
 749                             u_memmove(dest, dest+(haveLang?langPos:restPos), length);
 750                         } else {
 751                             /* would have fit, but didn't because of pattern prefix. */
 752                             sub0Pos=0; /* stops initial padding (and a second retry,
 753                                           so we won't end up here again) */
 754                             retry=TRUE;
 755                         }
 756                     }
 757                 }
 758
 759                 ++subi; /* move on to next substitution */
 760             }
 761         }
 762     } while(retry);
 763
 764     return u_terminateUChars(dest, destCapacity, length, pErrorCode);
 765 }
 766
 767 U_CAPI int32_t U_EXPORT2
 768 uloc_getDisplayKeyword(const char* keyword,
 769                        const char* displayLocale,
 770                        UChar* dest,
 771                        int32_t destCapacity,
 772                        UErrorCode* status){
 773
 774     /* argument checking */
 775     if(status==NULL || U_FAILURE(*status)) {
 776         return 0;
 777     }
 778
 779     if(destCapacity<0 || (destCapacity>0 && dest==NULL)) {
 780         *status=U_ILLEGAL_ARGUMENT_ERROR;
 781         return 0;
 782     }
 783
 784
 785     /* pass itemKey=NULL to look for a top-level item */
 786     return _getStringOrCopyKey(U_ICUDATA_LANG, displayLocale,
 787                                _kKeys, NULL,
 788                                keyword,
 789                                keyword,
 790                                dest, destCapacity,
 791                                status);
 792
 793 }
 794
 795
 796 #define UCURRENCY_DISPLAY_NAME_INDEX 1
 797
 798 U_CAPI int32_t U_EXPORT2
 799 uloc_getDisplayKeywordValue(   const char* locale,
 800                                const char* keyword,
 801                                const char* displayLocale,
 802                                UChar* dest,
 803                                int32_t destCapacity,
 804                                UErrorCode* status){
 805
 806
 807     char keywordValue[ULOC_FULLNAME_CAPACITY*4];
 808     int32_t capacity = ULOC_FULLNAME_CAPACITY*4;
 809     int32_t keywordValueLen =0;
 810
 811     /* argument checking */
 812     if(status==NULL || U_FAILURE(*status)) {
 813         return 0;
 814     }
 815
 816     if(destCapacity<0 || (destCapacity>0 && dest==NULL)) {
 817         *status=U_ILLEGAL_ARGUMENT_ERROR;
 818         return 0;
 819     }
 820
 821     /* get the keyword value */
 822     keywordValue[0]=0;
 823     keywordValueLen = uloc_getKeywordValue(locale, keyword, keywordValue, capacity, status);
 824
 825     /*
 826      * if the keyword is equal to currency .. then to get the display name
 827      * we need to do the fallback ourselves
 828      */
 829     if(uprv_stricmp(keyword, _kCurrency)==0){
 830
 831         int32_t dispNameLen = 0;
 832         const UChar *dispName = NULL;
 833
 834         UResourceBundle *bundle     = ures_open(U_ICUDATA_CURR, displayLocale, status);
 835         UResourceBundle *currencies = ures_getByKey(bundle, _kCurrencies, NULL, status);
 836         UResourceBundle *currency   = ures_getByKeyWithFallback(currencies, keywordValue, NULL, status);
 837
 838         dispName = ures_getStringByIndex(currency, UCURRENCY_DISPLAY_NAME_INDEX, &dispNameLen, status);
 839
 840         /*close the bundles */
 841         ures_close(currency);
 842         ures_close(currencies);
 843         ures_close(bundle);
 844
 845         if(U_FAILURE(*status)){
 846             if(*status == U_MISSING_RESOURCE_ERROR){
 847                 /* we just want to write the value over if nothing is available */
 848                 *status = U_USING_DEFAULT_WARNING;
 849             }else{
 850                 return 0;
 851             }
 852         }
 853
 854         /* now copy the dispName over if not NULL */
 855         if(dispName != NULL){
 856             if(dispNameLen <= destCapacity){
 857                 u_memcpy(dest, dispName, dispNameLen);
 858                 return u_terminateUChars(dest, destCapacity, dispNameLen, status);
 859             }else{
 860                 *status = U_BUFFER_OVERFLOW_ERROR;
 861                 return dispNameLen;
 862             }
 863         }else{
 864             /* we have not found the display name for the value .. just copy over */
 865             if(keywordValueLen <= destCapacity){
 866                 u_charsToUChars(keywordValue, dest, keywordValueLen);
 867                 return u_terminateUChars(dest, destCapacity, keywordValueLen, status);
 868             }else{
 869                  *status = U_BUFFER_OVERFLOW_ERROR;
 870                 return keywordValueLen;
 871             }
 872         }
 873
 874
 875     }else{
 876
 877         return _getStringOrCopyKey(U_ICUDATA_LANG, displayLocale,
 878                                    _kTypes, keyword,
 879                                    keywordValue,
 880                                    keywordValue,
 881                                    dest, destCapacity,
 882                                    status);
 883     }
 884 }