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      1 /*
      2 *******************************************************************************
      3 * Copyright (C) 2010-2014, International Business Machines Corporation and
      4 * others. All Rights Reserved.
      5 *******************************************************************************
      6 */
      7 
      8 #include "unicode/utypes.h"
      9 
     10 #if !UCONFIG_NO_FORMATTING
     11 
     12 #include "unicode/locdspnm.h"
     13 #include "unicode/msgfmt.h"
     14 #include "unicode/ures.h"
     15 #include "unicode/udisplaycontext.h"
     16 #include "unicode/brkiter.h"
     17 
     18 #include "cmemory.h"
     19 #include "cstring.h"
     20 #include "ulocimp.h"
     21 #include "ureslocs.h"
     22 #include "uresimp.h"
     23 
     24 #include <stdarg.h>
     25 
     26 /**
     27  * Concatenate a number of null-terminated strings to buffer, leaving a
     28  * null-terminated string.  The last argument should be the null pointer.
     29  * Return the length of the string in the buffer, not counting the trailing
     30  * null.  Return -1 if there is an error (buffer is null, or buflen < 1).
     31  */
     32 static int32_t ncat(char *buffer, uint32_t buflen, ...) {
     33   va_list args;
     34   char *str;
     35   char *p = buffer;
     36   const char* e = buffer + buflen - 1;
     37 
     38   if (buffer == NULL || buflen < 1) {
     39     return -1;
     40   }
     41 
     42   va_start(args, buflen);
     43   while ((str = va_arg(args, char *))) {
     44     char c;
     45     while (p != e && (c = *str++)) {
     46       *p++ = c;
     47     }
     48   }
     49   *p = 0;
     50   va_end(args);
     51 
     52   return p - buffer;
     53 }
     54 
     55 U_NAMESPACE_BEGIN
     56 
     57 ////////////////////////////////////////////////////////////////////////////////////////////////////
     58 
     59 // Access resource data for locale components.
     60 // Wrap code in uloc.c for now.
     61 class ICUDataTable {
     62     const char* path;
     63     Locale locale;
     64 
     65 public:
     66     ICUDataTable(const char* path, const Locale& locale);
     67     ~ICUDataTable();
     68 
     69     const Locale& getLocale();
     70 
     71     UnicodeString& get(const char* tableKey, const char* itemKey,
     72                         UnicodeString& result) const;
     73     UnicodeString& get(const char* tableKey, const char* subTableKey, const char* itemKey,
     74                         UnicodeString& result) const;
     75 
     76     UnicodeString& getNoFallback(const char* tableKey, const char* itemKey,
     77                                 UnicodeString &result) const;
     78     UnicodeString& getNoFallback(const char* tableKey, const char* subTableKey, const char* itemKey,
     79                                 UnicodeString &result) const;
     80 };
     81 
     82 inline UnicodeString &
     83 ICUDataTable::get(const char* tableKey, const char* itemKey, UnicodeString& result) const {
     84     return get(tableKey, NULL, itemKey, result);
     85 }
     86 
     87 inline UnicodeString &
     88 ICUDataTable::getNoFallback(const char* tableKey, const char* itemKey, UnicodeString& result) const {
     89     return getNoFallback(tableKey, NULL, itemKey, result);
     90 }
     91 
     92 ICUDataTable::ICUDataTable(const char* path, const Locale& locale)
     93     : path(NULL), locale(Locale::getRoot())
     94 {
     95   if (path) {
     96     int32_t len = uprv_strlen(path);
     97     this->path = (const char*) uprv_malloc(len + 1);
     98     if (this->path) {
     99       uprv_strcpy((char *)this->path, path);
    100       this->locale = locale;
    101     }
    102   }
    103 }
    104 
    105 ICUDataTable::~ICUDataTable() {
    106   if (path) {
    107     uprv_free((void*) path);
    108     path = NULL;
    109   }
    110 }
    111 
    112 const Locale&
    113 ICUDataTable::getLocale() {
    114   return locale;
    115 }
    116 
    117 UnicodeString &
    118 ICUDataTable::get(const char* tableKey, const char* subTableKey, const char* itemKey,
    119                   UnicodeString &result) const {
    120   UErrorCode status = U_ZERO_ERROR;
    121   int32_t len = 0;
    122 
    123   const UChar *s = uloc_getTableStringWithFallback(path, locale.getName(),
    124                                                    tableKey, subTableKey, itemKey,
    125                                                    &len, &status);
    126   if (U_SUCCESS(status) && len > 0) {
    127     return result.setTo(s, len);
    128   }
    129   return result.setTo(UnicodeString(itemKey, -1, US_INV));
    130 }
    131 
    132 UnicodeString &
    133 ICUDataTable::getNoFallback(const char* tableKey, const char* subTableKey, const char* itemKey,
    134                             UnicodeString& result) const {
    135   UErrorCode status = U_ZERO_ERROR;
    136   int32_t len = 0;
    137 
    138   const UChar *s = uloc_getTableStringWithFallback(path, locale.getName(),
    139                                                    tableKey, subTableKey, itemKey,
    140                                                    &len, &status);
    141   if (U_SUCCESS(status)) {
    142     return result.setTo(s, len);
    143   }
    144 
    145   result.setToBogus();
    146   return result;
    147 }
    148 
    149 ////////////////////////////////////////////////////////////////////////////////////////////////////
    150 
    151 LocaleDisplayNames::~LocaleDisplayNames() {}
    152 
    153 ////////////////////////////////////////////////////////////////////////////////////////////////////
    154 
    155 #if 0  // currently unused
    156 
    157 class DefaultLocaleDisplayNames : public LocaleDisplayNames {
    158   UDialectHandling dialectHandling;
    159 
    160 public:
    161   // constructor
    162   DefaultLocaleDisplayNames(UDialectHandling dialectHandling);
    163 
    164   virtual ~DefaultLocaleDisplayNames();
    165 
    166   virtual const Locale& getLocale() const;
    167   virtual UDialectHandling getDialectHandling() const;
    168 
    169   virtual UnicodeString& localeDisplayName(const Locale& locale,
    170                                            UnicodeString& result) const;
    171   virtual UnicodeString& localeDisplayName(const char* localeId,
    172                                            UnicodeString& result) const;
    173   virtual UnicodeString& languageDisplayName(const char* lang,
    174                                              UnicodeString& result) const;
    175   virtual UnicodeString& scriptDisplayName(const char* script,
    176                                            UnicodeString& result) const;
    177   virtual UnicodeString& scriptDisplayName(UScriptCode scriptCode,
    178                                            UnicodeString& result) const;
    179   virtual UnicodeString& regionDisplayName(const char* region,
    180                                            UnicodeString& result) const;
    181   virtual UnicodeString& variantDisplayName(const char* variant,
    182                                             UnicodeString& result) const;
    183   virtual UnicodeString& keyDisplayName(const char* key,
    184                                         UnicodeString& result) const;
    185   virtual UnicodeString& keyValueDisplayName(const char* key,
    186                                              const char* value,
    187                                              UnicodeString& result) const;
    188 };
    189 
    190 DefaultLocaleDisplayNames::DefaultLocaleDisplayNames(UDialectHandling dialectHandling)
    191     : dialectHandling(dialectHandling) {
    192 }
    193 
    194 DefaultLocaleDisplayNames::~DefaultLocaleDisplayNames() {
    195 }
    196 
    197 const Locale&
    198 DefaultLocaleDisplayNames::getLocale() const {
    199   return Locale::getRoot();
    200 }
    201 
    202 UDialectHandling
    203 DefaultLocaleDisplayNames::getDialectHandling() const {
    204   return dialectHandling;
    205 }
    206 
    207 UnicodeString&
    208 DefaultLocaleDisplayNames::localeDisplayName(const Locale& locale,
    209                                              UnicodeString& result) const {
    210   return result = UnicodeString(locale.getName(), -1, US_INV);
    211 }
    212 
    213 UnicodeString&
    214 DefaultLocaleDisplayNames::localeDisplayName(const char* localeId,
    215                                              UnicodeString& result) const {
    216   return result = UnicodeString(localeId, -1, US_INV);
    217 }
    218 
    219 UnicodeString&
    220 DefaultLocaleDisplayNames::languageDisplayName(const char* lang,
    221                                                UnicodeString& result) const {
    222   return result = UnicodeString(lang, -1, US_INV);
    223 }
    224 
    225 UnicodeString&
    226 DefaultLocaleDisplayNames::scriptDisplayName(const char* script,
    227                                              UnicodeString& result) const {
    228   return result = UnicodeString(script, -1, US_INV);
    229 }
    230 
    231 UnicodeString&
    232 DefaultLocaleDisplayNames::scriptDisplayName(UScriptCode scriptCode,
    233                                              UnicodeString& result) const {
    234   const char* name = uscript_getName(scriptCode);
    235   if (name) {
    236     return result = UnicodeString(name, -1, US_INV);
    237   }
    238   return result.remove();
    239 }
    240 
    241 UnicodeString&
    242 DefaultLocaleDisplayNames::regionDisplayName(const char* region,
    243                                              UnicodeString& result) const {
    244   return result = UnicodeString(region, -1, US_INV);
    245 }
    246 
    247 UnicodeString&
    248 DefaultLocaleDisplayNames::variantDisplayName(const char* variant,
    249                                               UnicodeString& result) const {
    250   return result = UnicodeString(variant, -1, US_INV);
    251 }
    252 
    253 UnicodeString&
    254 DefaultLocaleDisplayNames::keyDisplayName(const char* key,
    255                                           UnicodeString& result) const {
    256   return result = UnicodeString(key, -1, US_INV);
    257 }
    258 
    259 UnicodeString&
    260 DefaultLocaleDisplayNames::keyValueDisplayName(const char* /* key */,
    261                                                const char* value,
    262                                                UnicodeString& result) const {
    263   return result = UnicodeString(value, -1, US_INV);
    264 }
    265 
    266 #endif  // currently unused class DefaultLocaleDisplayNames
    267 
    268 ////////////////////////////////////////////////////////////////////////////////////////////////////
    269 
    270 class LocaleDisplayNamesImpl : public LocaleDisplayNames {
    271     Locale locale;
    272     UDialectHandling dialectHandling;
    273     ICUDataTable langData;
    274     ICUDataTable regionData;
    275     MessageFormat *separatorFormat;
    276     MessageFormat *format;
    277     MessageFormat *keyTypeFormat;
    278     UDisplayContext capitalizationContext;
    279     BreakIterator* capitalizationBrkIter;
    280     UnicodeString formatOpenParen;
    281     UnicodeString formatReplaceOpenParen;
    282     UnicodeString formatCloseParen;
    283     UnicodeString formatReplaceCloseParen;
    284 
    285     // Constants for capitalization context usage types.
    286     enum CapContextUsage {
    287         kCapContextUsageLanguage,
    288         kCapContextUsageScript,
    289         kCapContextUsageTerritory,
    290         kCapContextUsageVariant,
    291         kCapContextUsageKey,
    292         kCapContextUsageKeyValue,
    293         kCapContextUsageCount
    294     };
    295     // Capitalization transforms. For each usage type, indicates whether to titlecase for
    296     // the context specified in capitalizationContext (which we know at construction time)
    297      UBool fCapitalization[kCapContextUsageCount];
    298 
    299 public:
    300     // constructor
    301     LocaleDisplayNamesImpl(const Locale& locale, UDialectHandling dialectHandling);
    302     LocaleDisplayNamesImpl(const Locale& locale, UDisplayContext *contexts, int32_t length);
    303     virtual ~LocaleDisplayNamesImpl();
    304 
    305     virtual const Locale& getLocale() const;
    306     virtual UDialectHandling getDialectHandling() const;
    307     virtual UDisplayContext getContext(UDisplayContextType type) const;
    308 
    309     virtual UnicodeString& localeDisplayName(const Locale& locale,
    310                                                 UnicodeString& result) const;
    311     virtual UnicodeString& localeDisplayName(const char* localeId,
    312                                                 UnicodeString& result) const;
    313     virtual UnicodeString& languageDisplayName(const char* lang,
    314                                                UnicodeString& result) const;
    315     virtual UnicodeString& scriptDisplayName(const char* script,
    316                                                 UnicodeString& result) const;
    317     virtual UnicodeString& scriptDisplayName(UScriptCode scriptCode,
    318                                                 UnicodeString& result) const;
    319     virtual UnicodeString& regionDisplayName(const char* region,
    320                                                 UnicodeString& result) const;
    321     virtual UnicodeString& variantDisplayName(const char* variant,
    322                                                 UnicodeString& result) const;
    323     virtual UnicodeString& keyDisplayName(const char* key,
    324                                                 UnicodeString& result) const;
    325     virtual UnicodeString& keyValueDisplayName(const char* key,
    326                                                 const char* value,
    327                                                 UnicodeString& result) const;
    328 private:
    329     UnicodeString& localeIdName(const char* localeId,
    330                                 UnicodeString& result) const;
    331     UnicodeString& appendWithSep(UnicodeString& buffer, const UnicodeString& src) const;
    332     UnicodeString& adjustForUsageAndContext(CapContextUsage usage, UnicodeString& result) const;
    333     void initialize(void);
    334 };
    335 
    336 LocaleDisplayNamesImpl::LocaleDisplayNamesImpl(const Locale& locale,
    337                                                UDialectHandling dialectHandling)
    338     : dialectHandling(dialectHandling)
    339     , langData(U_ICUDATA_LANG, locale)
    340     , regionData(U_ICUDATA_REGION, locale)
    341     , separatorFormat(NULL)
    342     , format(NULL)
    343     , keyTypeFormat(NULL)
    344     , capitalizationContext(UDISPCTX_CAPITALIZATION_NONE)
    345     , capitalizationBrkIter(NULL)
    346 {
    347     initialize();
    348 }
    349 
    350 LocaleDisplayNamesImpl::LocaleDisplayNamesImpl(const Locale& locale,
    351                                                UDisplayContext *contexts, int32_t length)
    352     : dialectHandling(ULDN_STANDARD_NAMES)
    353     , langData(U_ICUDATA_LANG, locale)
    354     , regionData(U_ICUDATA_REGION, locale)
    355     , separatorFormat(NULL)
    356     , format(NULL)
    357     , keyTypeFormat(NULL)
    358     , capitalizationContext(UDISPCTX_CAPITALIZATION_NONE)
    359     , capitalizationBrkIter(NULL)
    360 {
    361     while (length-- > 0) {
    362         UDisplayContext value = *contexts++;
    363         UDisplayContextType selector = (UDisplayContextType)((uint32_t)value >> 8);
    364         switch (selector) {
    365             case UDISPCTX_TYPE_DIALECT_HANDLING:
    366                 dialectHandling = (UDialectHandling)value;
    367                 break;
    368             case UDISPCTX_TYPE_CAPITALIZATION:
    369                 capitalizationContext = value;
    370                 break;
    371             default:
    372                 break;
    373         }
    374     }
    375     initialize();
    376 }
    377 
    378 void
    379 LocaleDisplayNamesImpl::initialize(void) {
    380     LocaleDisplayNamesImpl *nonConstThis = (LocaleDisplayNamesImpl *)this;
    381     nonConstThis->locale = langData.getLocale() == Locale::getRoot()
    382         ? regionData.getLocale()
    383         : langData.getLocale();
    384 
    385     UnicodeString sep;
    386     langData.getNoFallback("localeDisplayPattern", "separator", sep);
    387     if (sep.isBogus()) {
    388         sep = UnicodeString("{0}, {1}", -1, US_INV);
    389     }
    390     UErrorCode status = U_ZERO_ERROR;
    391     separatorFormat = new MessageFormat(sep, status);
    392 
    393     UnicodeString pattern;
    394     langData.getNoFallback("localeDisplayPattern", "pattern", pattern);
    395     if (pattern.isBogus()) {
    396         pattern = UnicodeString("{0} ({1})", -1, US_INV);
    397     }
    398     format = new MessageFormat(pattern, status);
    399     if (pattern.indexOf((UChar)0xFF08) >= 0) {
    400         formatOpenParen.setTo((UChar)0xFF08);         // fullwidth (
    401         formatReplaceOpenParen.setTo((UChar)0xFF3B);  // fullwidth [
    402         formatCloseParen.setTo((UChar)0xFF09);        // fullwidth )
    403         formatReplaceCloseParen.setTo((UChar)0xFF3D); // fullwidth ]
    404     } else {
    405         formatOpenParen.setTo((UChar)0x0028);         // (
    406         formatReplaceOpenParen.setTo((UChar)0x005B);  // [
    407         formatCloseParen.setTo((UChar)0x0029);        // )
    408         formatReplaceCloseParen.setTo((UChar)0x005D); // ]
    409     }
    410 
    411     UnicodeString ktPattern;
    412     langData.get("localeDisplayPattern", "keyTypePattern", ktPattern);
    413     if (ktPattern.isBogus()) {
    414         ktPattern = UnicodeString("{0}={1}", -1, US_INV);
    415     }
    416     keyTypeFormat = new MessageFormat(ktPattern, status);
    417 
    418     uprv_memset(fCapitalization, 0, sizeof(fCapitalization));
    419 #if !UCONFIG_NO_BREAK_ITERATION
    420     // The following is basically copied from DateFormatSymbols::initializeData
    421     typedef struct {
    422         const char * usageName;
    423         LocaleDisplayNamesImpl::CapContextUsage usageEnum;
    424     } ContextUsageNameToEnum;
    425     const ContextUsageNameToEnum contextUsageTypeMap[] = {
    426        // Entries must be sorted by usageTypeName; entry with NULL name terminates list.
    427         { "key",        kCapContextUsageKey },
    428         { "keyValue",   kCapContextUsageKeyValue },
    429         { "languages",  kCapContextUsageLanguage },
    430         { "script",     kCapContextUsageScript },
    431         { "territory",  kCapContextUsageTerritory },
    432         { "variant",    kCapContextUsageVariant },
    433         { NULL,         (CapContextUsage)0 },
    434     };
    435     // Only get the context data if we need it! This is a const object so we know now...
    436     // Also check whether we will need a break iterator (depends on the data)
    437     UBool needBrkIter = FALSE;
    438     if (capitalizationContext == UDISPCTX_CAPITALIZATION_FOR_UI_LIST_OR_MENU || capitalizationContext == UDISPCTX_CAPITALIZATION_FOR_STANDALONE) {
    439         int32_t len = 0;
    440         UResourceBundle *localeBundle = ures_open(NULL, locale.getName(), &status);
    441         if (U_SUCCESS(status)) {
    442             UResourceBundle *contextTransforms = ures_getByKeyWithFallback(localeBundle, "contextTransforms", NULL, &status);
    443             if (U_SUCCESS(status)) {
    444                 UResourceBundle *contextTransformUsage;
    445                 while ( (contextTransformUsage = ures_getNextResource(contextTransforms, NULL, &status)) != NULL ) {
    446                     const int32_t * intVector = ures_getIntVector(contextTransformUsage, &len, &status);
    447                     if (U_SUCCESS(status) && intVector != NULL && len >= 2) {
    448                         const char* usageKey = ures_getKey(contextTransformUsage);
    449                         if (usageKey != NULL) {
    450                             const ContextUsageNameToEnum * typeMapPtr = contextUsageTypeMap;
    451                             int32_t compResult = 0;
    452                             // linear search; list is short and we cannot be sure that bsearch is available
    453                             while ( typeMapPtr->usageName != NULL && (compResult = uprv_strcmp(usageKey, typeMapPtr->usageName)) > 0 ) {
    454                                 ++typeMapPtr;
    455                             }
    456                             if (typeMapPtr->usageName != NULL && compResult == 0) {
    457                                 int32_t titlecaseInt = (capitalizationContext == UDISPCTX_CAPITALIZATION_FOR_UI_LIST_OR_MENU)? intVector[0]: intVector[1];
    458                                 if (titlecaseInt != 0) {
    459                                     fCapitalization[typeMapPtr->usageEnum] = TRUE;;
    460                                     needBrkIter = TRUE;
    461                                 }
    462                             }
    463                         }
    464                     }
    465                     status = U_ZERO_ERROR;
    466                     ures_close(contextTransformUsage);
    467                 }
    468                 ures_close(contextTransforms);
    469             }
    470             ures_close(localeBundle);
    471         }
    472     }
    473     // Get a sentence break iterator if we will need it
    474     if (needBrkIter || capitalizationContext == UDISPCTX_CAPITALIZATION_FOR_BEGINNING_OF_SENTENCE) {
    475         status = U_ZERO_ERROR;
    476         capitalizationBrkIter = BreakIterator::createSentenceInstance(locale, status);
    477         if (U_FAILURE(status)) {
    478             delete capitalizationBrkIter;
    479             capitalizationBrkIter = NULL;
    480         }
    481     }
    482 #endif
    483 }
    484 
    485 LocaleDisplayNamesImpl::~LocaleDisplayNamesImpl() {
    486     delete separatorFormat;
    487     delete format;
    488     delete keyTypeFormat;
    489     delete capitalizationBrkIter;
    490  }
    491 
    492 const Locale&
    493 LocaleDisplayNamesImpl::getLocale() const {
    494     return locale;
    495 }
    496 
    497 UDialectHandling
    498 LocaleDisplayNamesImpl::getDialectHandling() const {
    499     return dialectHandling;
    500 }
    501 
    502 UDisplayContext
    503 LocaleDisplayNamesImpl::getContext(UDisplayContextType type) const {
    504     switch (type) {
    505         case UDISPCTX_TYPE_DIALECT_HANDLING:
    506             return (UDisplayContext)dialectHandling;
    507         case UDISPCTX_TYPE_CAPITALIZATION:
    508             return capitalizationContext;
    509         default:
    510             break;
    511     }
    512     return (UDisplayContext)0;
    513 }
    514 
    515 UnicodeString&
    516 LocaleDisplayNamesImpl::adjustForUsageAndContext(CapContextUsage usage,
    517                                                 UnicodeString& result) const {
    518 #if !UCONFIG_NO_BREAK_ITERATION
    519     // check to see whether we need to titlecase result
    520     if ( result.length() > 0 && u_islower(result.char32At(0)) && capitalizationBrkIter!= NULL &&
    521           ( capitalizationContext==UDISPCTX_CAPITALIZATION_FOR_BEGINNING_OF_SENTENCE || fCapitalization[usage] ) ) {
    522         // note fCapitalization[usage] won't be set unless capitalizationContext is UI_LIST_OR_MENU or STANDALONE
    523         result.toTitle(capitalizationBrkIter, locale, U_TITLECASE_NO_LOWERCASE | U_TITLECASE_NO_BREAK_ADJUSTMENT);
    524     }
    525 #endif
    526     return result;
    527 }
    528 
    529 UnicodeString&
    530 LocaleDisplayNamesImpl::localeDisplayName(const Locale& locale,
    531                                           UnicodeString& result) const {
    532   UnicodeString resultName;
    533 
    534   const char* lang = locale.getLanguage();
    535   if (uprv_strlen(lang) == 0) {
    536     lang = "root";
    537   }
    538   const char* script = locale.getScript();
    539   const char* country = locale.getCountry();
    540   const char* variant = locale.getVariant();
    541 
    542   UBool hasScript = uprv_strlen(script) > 0;
    543   UBool hasCountry = uprv_strlen(country) > 0;
    544   UBool hasVariant = uprv_strlen(variant) > 0;
    545 
    546   if (dialectHandling == ULDN_DIALECT_NAMES) {
    547     char buffer[ULOC_FULLNAME_CAPACITY];
    548     do { // loop construct is so we can break early out of search
    549       if (hasScript && hasCountry) {
    550         ncat(buffer, ULOC_FULLNAME_CAPACITY, lang, "_", script, "_", country, (char *)0);
    551         localeIdName(buffer, resultName);
    552         if (!resultName.isBogus()) {
    553           hasScript = FALSE;
    554           hasCountry = FALSE;
    555           break;
    556         }
    557       }
    558       if (hasScript) {
    559         ncat(buffer, ULOC_FULLNAME_CAPACITY, lang, "_", script, (char *)0);
    560         localeIdName(buffer, resultName);
    561         if (!resultName.isBogus()) {
    562           hasScript = FALSE;
    563           break;
    564         }
    565       }
    566       if (hasCountry) {
    567         ncat(buffer, ULOC_FULLNAME_CAPACITY, lang, "_", country, (char*)0);
    568         localeIdName(buffer, resultName);
    569         if (!resultName.isBogus()) {
    570           hasCountry = FALSE;
    571           break;
    572         }
    573       }
    574     } while (FALSE);
    575   }
    576   if (resultName.isBogus() || resultName.isEmpty()) {
    577     localeIdName(lang, resultName);
    578   }
    579 
    580   UnicodeString resultRemainder;
    581   UnicodeString temp;
    582   StringEnumeration *e = NULL;
    583   UErrorCode status = U_ZERO_ERROR;
    584 
    585   if (hasScript) {
    586     resultRemainder.append(scriptDisplayName(script, temp));
    587   }
    588   if (hasCountry) {
    589     appendWithSep(resultRemainder, regionDisplayName(country, temp));
    590   }
    591   if (hasVariant) {
    592     appendWithSep(resultRemainder, variantDisplayName(variant, temp));
    593   }
    594   resultRemainder.findAndReplace(formatOpenParen, formatReplaceOpenParen);
    595   resultRemainder.findAndReplace(formatCloseParen, formatReplaceCloseParen);
    596 
    597   e = locale.createKeywords(status);
    598   if (e && U_SUCCESS(status)) {
    599     UnicodeString temp2;
    600     char value[ULOC_KEYWORD_AND_VALUES_CAPACITY]; // sigh, no ULOC_VALUE_CAPACITY
    601     const char* key;
    602     while ((key = e->next((int32_t *)0, status)) != NULL) {
    603       locale.getKeywordValue(key, value, ULOC_KEYWORD_AND_VALUES_CAPACITY, status);
    604       keyDisplayName(key, temp);
    605       temp.findAndReplace(formatOpenParen, formatReplaceOpenParen);
    606       temp.findAndReplace(formatCloseParen, formatReplaceCloseParen);
    607       keyValueDisplayName(key, value, temp2);
    608       temp2.findAndReplace(formatOpenParen, formatReplaceOpenParen);
    609       temp2.findAndReplace(formatCloseParen, formatReplaceCloseParen);
    610       if (temp2 != UnicodeString(value, -1, US_INV)) {
    611         appendWithSep(resultRemainder, temp2);
    612       } else if (temp != UnicodeString(key, -1, US_INV)) {
    613         UnicodeString temp3;
    614         Formattable data[] = {
    615           temp,
    616           temp2
    617         };
    618         FieldPosition fpos;
    619         status = U_ZERO_ERROR;
    620         keyTypeFormat->format(data, 2, temp3, fpos, status);
    621         appendWithSep(resultRemainder, temp3);
    622       } else {
    623         appendWithSep(resultRemainder, temp)
    624           .append((UChar)0x3d /* = */)
    625           .append(temp2);
    626       }
    627     }
    628     delete e;
    629   }
    630 
    631   if (!resultRemainder.isEmpty()) {
    632     Formattable data[] = {
    633       resultName,
    634       resultRemainder
    635     };
    636     FieldPosition fpos;
    637     status = U_ZERO_ERROR;
    638     format->format(data, 2, result, fpos, status);
    639     return adjustForUsageAndContext(kCapContextUsageLanguage, result);
    640   }
    641 
    642   result = resultName;
    643   return adjustForUsageAndContext(kCapContextUsageLanguage, result);
    644 }
    645 
    646 UnicodeString&
    647 LocaleDisplayNamesImpl::appendWithSep(UnicodeString& buffer, const UnicodeString& src) const {
    648     if (buffer.isEmpty()) {
    649         buffer.setTo(src);
    650     } else {
    651         UnicodeString combined;
    652         Formattable data[] = {
    653           buffer,
    654           src
    655         };
    656         FieldPosition fpos;
    657         UErrorCode status = U_ZERO_ERROR;
    658         separatorFormat->format(data, 2, combined, fpos, status);
    659         if (U_SUCCESS(status)) {
    660             buffer.setTo(combined);
    661         }
    662     }
    663     return buffer;
    664 }
    665 
    666 UnicodeString&
    667 LocaleDisplayNamesImpl::localeDisplayName(const char* localeId,
    668                                           UnicodeString& result) const {
    669     return localeDisplayName(Locale(localeId), result);
    670 }
    671 
    672 // private
    673 UnicodeString&
    674 LocaleDisplayNamesImpl::localeIdName(const char* localeId,
    675                                      UnicodeString& result) const {
    676     return langData.getNoFallback("Languages", localeId, result);
    677 }
    678 
    679 UnicodeString&
    680 LocaleDisplayNamesImpl::languageDisplayName(const char* lang,
    681                                             UnicodeString& result) const {
    682     if (uprv_strcmp("root", lang) == 0 || uprv_strchr(lang, '_') != NULL) {
    683         return result = UnicodeString(lang, -1, US_INV);
    684     }
    685     langData.get("Languages", lang, result);
    686     return adjustForUsageAndContext(kCapContextUsageLanguage, result);
    687 }
    688 
    689 UnicodeString&
    690 LocaleDisplayNamesImpl::scriptDisplayName(const char* script,
    691                                           UnicodeString& result) const {
    692     langData.get("Scripts", script, result);
    693     return adjustForUsageAndContext(kCapContextUsageScript, result);
    694 }
    695 
    696 UnicodeString&
    697 LocaleDisplayNamesImpl::scriptDisplayName(UScriptCode scriptCode,
    698                                           UnicodeString& result) const {
    699     const char* name = uscript_getName(scriptCode);
    700     langData.get("Scripts", name, result);
    701     return adjustForUsageAndContext(kCapContextUsageScript, result);
    702 }
    703 
    704 UnicodeString&
    705 LocaleDisplayNamesImpl::regionDisplayName(const char* region,
    706                                           UnicodeString& result) const {
    707     regionData.get("Countries", region, result);
    708     return adjustForUsageAndContext(kCapContextUsageTerritory, result);
    709 }
    710 
    711 UnicodeString&
    712 LocaleDisplayNamesImpl::variantDisplayName(const char* variant,
    713                                            UnicodeString& result) const {
    714     langData.get("Variants", variant, result);
    715     return adjustForUsageAndContext(kCapContextUsageVariant, result);
    716 }
    717 
    718 UnicodeString&
    719 LocaleDisplayNamesImpl::keyDisplayName(const char* key,
    720                                        UnicodeString& result) const {
    721     langData.get("Keys", key, result);
    722     return adjustForUsageAndContext(kCapContextUsageKey, result);
    723 }
    724 
    725 UnicodeString&
    726 LocaleDisplayNamesImpl::keyValueDisplayName(const char* key,
    727                                             const char* value,
    728                                             UnicodeString& result) const {
    729     langData.get("Types", key, value, result);
    730     return adjustForUsageAndContext(kCapContextUsageKeyValue, result);
    731 }
    732 
    733 ////////////////////////////////////////////////////////////////////////////////////////////////////
    734 
    735 LocaleDisplayNames*
    736 LocaleDisplayNames::createInstance(const Locale& locale,
    737                                    UDialectHandling dialectHandling) {
    738     return new LocaleDisplayNamesImpl(locale, dialectHandling);
    739 }
    740 
    741 LocaleDisplayNames*
    742 LocaleDisplayNames::createInstance(const Locale& locale,
    743                                    UDisplayContext *contexts, int32_t length) {
    744     if (contexts == NULL) {
    745         length = 0;
    746     }
    747     return new LocaleDisplayNamesImpl(locale, contexts, length);
    748 }
    749 
    750 U_NAMESPACE_END
    751 
    752 ////////////////////////////////////////////////////////////////////////////////////////////////////
    753 
    754 U_NAMESPACE_USE
    755 
    756 U_CAPI ULocaleDisplayNames * U_EXPORT2
    757 uldn_open(const char * locale,
    758           UDialectHandling dialectHandling,
    759           UErrorCode *pErrorCode) {
    760   if (U_FAILURE(*pErrorCode)) {
    761     return 0;
    762   }
    763   if (locale == NULL) {
    764     locale = uloc_getDefault();
    765   }
    766   return (ULocaleDisplayNames *)LocaleDisplayNames::createInstance(Locale(locale), dialectHandling);
    767 }
    768 
    769 U_CAPI ULocaleDisplayNames * U_EXPORT2
    770 uldn_openForContext(const char * locale,
    771                     UDisplayContext *contexts, int32_t length,
    772                     UErrorCode *pErrorCode) {
    773   if (U_FAILURE(*pErrorCode)) {
    774     return 0;
    775   }
    776   if (locale == NULL) {
    777     locale = uloc_getDefault();
    778   }
    779   return (ULocaleDisplayNames *)LocaleDisplayNames::createInstance(Locale(locale), contexts, length);
    780 }
    781 
    782 
    783 U_CAPI void U_EXPORT2
    784 uldn_close(ULocaleDisplayNames *ldn) {
    785   delete (LocaleDisplayNames *)ldn;
    786 }
    787 
    788 U_CAPI const char * U_EXPORT2
    789 uldn_getLocale(const ULocaleDisplayNames *ldn) {
    790   if (ldn) {
    791     return ((const LocaleDisplayNames *)ldn)->getLocale().getName();
    792   }
    793   return NULL;
    794 }
    795 
    796 U_CAPI UDialectHandling U_EXPORT2
    797 uldn_getDialectHandling(const ULocaleDisplayNames *ldn) {
    798   if (ldn) {
    799     return ((const LocaleDisplayNames *)ldn)->getDialectHandling();
    800   }
    801   return ULDN_STANDARD_NAMES;
    802 }
    803 
    804 U_CAPI UDisplayContext U_EXPORT2
    805 uldn_getContext(const ULocaleDisplayNames *ldn,
    806               UDisplayContextType type,
    807               UErrorCode *pErrorCode) {
    808   if (U_FAILURE(*pErrorCode)) {
    809     return (UDisplayContext)0;
    810   }
    811   return ((const LocaleDisplayNames *)ldn)->getContext(type);
    812 }
    813 
    814 U_CAPI int32_t U_EXPORT2
    815 uldn_localeDisplayName(const ULocaleDisplayNames *ldn,
    816                        const char *locale,
    817                        UChar *result,
    818                        int32_t maxResultSize,
    819                        UErrorCode *pErrorCode) {
    820   if (U_FAILURE(*pErrorCode)) {
    821     return 0;
    822   }
    823   if (ldn == NULL || locale == NULL || (result == NULL && maxResultSize > 0) || maxResultSize < 0) {
    824     *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
    825     return 0;
    826   }
    827   UnicodeString temp(result, 0, maxResultSize);
    828   ((const LocaleDisplayNames *)ldn)->localeDisplayName(locale, temp);
    829   return temp.extract(result, maxResultSize, *pErrorCode);
    830 }
    831 
    832 U_CAPI int32_t U_EXPORT2
    833 uldn_languageDisplayName(const ULocaleDisplayNames *ldn,
    834                          const char *lang,
    835                          UChar *result,
    836                          int32_t maxResultSize,
    837                          UErrorCode *pErrorCode) {
    838   if (U_FAILURE(*pErrorCode)) {
    839     return 0;
    840   }
    841   if (ldn == NULL || lang == NULL || (result == NULL && maxResultSize > 0) || maxResultSize < 0) {
    842     *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
    843     return 0;
    844   }
    845   UnicodeString temp(result, 0, maxResultSize);
    846   ((const LocaleDisplayNames *)ldn)->languageDisplayName(lang, temp);
    847   return temp.extract(result, maxResultSize, *pErrorCode);
    848 }
    849 
    850 U_CAPI int32_t U_EXPORT2
    851 uldn_scriptDisplayName(const ULocaleDisplayNames *ldn,
    852                        const char *script,
    853                        UChar *result,
    854                        int32_t maxResultSize,
    855                        UErrorCode *pErrorCode) {
    856   if (U_FAILURE(*pErrorCode)) {
    857     return 0;
    858   }
    859   if (ldn == NULL || script == NULL || (result == NULL && maxResultSize > 0) || maxResultSize < 0) {
    860     *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
    861     return 0;
    862   }
    863   UnicodeString temp(result, 0, maxResultSize);
    864   ((const LocaleDisplayNames *)ldn)->scriptDisplayName(script, temp);
    865   return temp.extract(result, maxResultSize, *pErrorCode);
    866 }
    867 
    868 U_CAPI int32_t U_EXPORT2
    869 uldn_scriptCodeDisplayName(const ULocaleDisplayNames *ldn,
    870                            UScriptCode scriptCode,
    871                            UChar *result,
    872                            int32_t maxResultSize,
    873                            UErrorCode *pErrorCode) {
    874   return uldn_scriptDisplayName(ldn, uscript_getName(scriptCode), result, maxResultSize, pErrorCode);
    875 }
    876 
    877 U_CAPI int32_t U_EXPORT2
    878 uldn_regionDisplayName(const ULocaleDisplayNames *ldn,
    879                        const char *region,
    880                        UChar *result,
    881                        int32_t maxResultSize,
    882                        UErrorCode *pErrorCode) {
    883   if (U_FAILURE(*pErrorCode)) {
    884     return 0;
    885   }
    886   if (ldn == NULL || region == NULL || (result == NULL && maxResultSize > 0) || maxResultSize < 0) {
    887     *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
    888     return 0;
    889   }
    890   UnicodeString temp(result, 0, maxResultSize);
    891   ((const LocaleDisplayNames *)ldn)->regionDisplayName(region, temp);
    892   return temp.extract(result, maxResultSize, *pErrorCode);
    893 }
    894 
    895 U_CAPI int32_t U_EXPORT2
    896 uldn_variantDisplayName(const ULocaleDisplayNames *ldn,
    897                         const char *variant,
    898                         UChar *result,
    899                         int32_t maxResultSize,
    900                         UErrorCode *pErrorCode) {
    901   if (U_FAILURE(*pErrorCode)) {
    902     return 0;
    903   }
    904   if (ldn == NULL || variant == NULL || (result == NULL && maxResultSize > 0) || maxResultSize < 0) {
    905     *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
    906     return 0;
    907   }
    908   UnicodeString temp(result, 0, maxResultSize);
    909   ((const LocaleDisplayNames *)ldn)->variantDisplayName(variant, temp);
    910   return temp.extract(result, maxResultSize, *pErrorCode);
    911 }
    912 
    913 U_CAPI int32_t U_EXPORT2
    914 uldn_keyDisplayName(const ULocaleDisplayNames *ldn,
    915                     const char *key,
    916                     UChar *result,
    917                     int32_t maxResultSize,
    918                     UErrorCode *pErrorCode) {
    919   if (U_FAILURE(*pErrorCode)) {
    920     return 0;
    921   }
    922   if (ldn == NULL || key == NULL || (result == NULL && maxResultSize > 0) || maxResultSize < 0) {
    923     *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
    924     return 0;
    925   }
    926   UnicodeString temp(result, 0, maxResultSize);
    927   ((const LocaleDisplayNames *)ldn)->keyDisplayName(key, temp);
    928   return temp.extract(result, maxResultSize, *pErrorCode);
    929 }
    930 
    931 U_CAPI int32_t U_EXPORT2
    932 uldn_keyValueDisplayName(const ULocaleDisplayNames *ldn,
    933                          const char *key,
    934                          const char *value,
    935                          UChar *result,
    936                          int32_t maxResultSize,
    937                          UErrorCode *pErrorCode) {
    938   if (U_FAILURE(*pErrorCode)) {
    939     return 0;
    940   }
    941   if (ldn == NULL || key == NULL || value == NULL || (result == NULL && maxResultSize > 0)
    942       || maxResultSize < 0) {
    943     *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
    944     return 0;
    945   }
    946   UnicodeString temp(result, 0, maxResultSize);
    947   ((const LocaleDisplayNames *)ldn)->keyValueDisplayName(key, value, temp);
    948   return temp.extract(result, maxResultSize, *pErrorCode);
    949 }
    950 
    951 #endif
    952