text: // Copyright 2013 the V8 project authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  // limitations under the License.
  
  #include "src/i18n.h"
  
  #include <memory>
  
  #include "src/api.h"
  #include "src/factory.h"
  #include "src/isolate.h"
  #include "src/objects-inl.h"
  #include "unicode/brkiter.h"
  #include "unicode/calendar.h"
  #include "unicode/coll.h"
  #include "unicode/curramt.h"
  #include "unicode/dcfmtsym.h"
  #include "unicode/decimfmt.h"
  #include "unicode/dtfmtsym.h"
  #include "unicode/dtptngen.h"
  #include "unicode/gregocal.h"
  #include "unicode/locid.h"
  #include "unicode/numfmt.h"
  #include "unicode/numsys.h"
  #include "unicode/rbbi.h"
  #include "unicode/smpdtfmt.h"
  #include "unicode/timezone.h"
  #include "unicode/uchar.h"
  #include "unicode/ucol.h"
  #include "unicode/ucurr.h"
  #include "unicode/unum.h"
  #include "unicode/uversion.h"
  
  namespace v8 {
  namespace internal {
  
  namespace {
  
  bool ExtractStringSetting(Isolate* isolate,
                            Handle<JSObject> options,
                            const char* key,
                            icu::UnicodeString* setting) {
    Handle<String> str = isolate->factory()->NewStringFromAsciiChecked(key);
    Handle<Object> object =
        JSReceiver::GetProperty(options, str).ToHandleChecked();
    if (object->IsString()) {
      v8::String::Utf8Value utf8_string(
          v8::Utils::ToLocal(Handle<String>::cast(object)));
      *setting = icu::UnicodeString::fromUTF8(*utf8_string);
      return true;
    }
    return false;
  }
  
  
  bool ExtractIntegerSetting(Isolate* isolate,
                             Handle<JSObject> options,
                             const char* key,
                             int32_t* value) {
    Handle<String> str = isolate->factory()->NewStringFromAsciiChecked(key);
    Handle<Object> object =
        JSReceiver::GetProperty(options, str).ToHandleChecked();
    if (object->IsNumber()) {
      object->ToInt32(value);
      return true;
    }
    return false;
  }
  
  
  bool ExtractBooleanSetting(Isolate* isolate,
                             Handle<JSObject> options,
                             const char* key,
                             bool* value) {
    Handle<String> str = isolate->factory()->NewStringFromAsciiChecked(key);
    Handle<Object> object =
        JSReceiver::GetProperty(options, str).ToHandleChecked();
    if (object->IsBoolean()) {
      *value = object->BooleanValue();
      return true;
    }
    return false;
  }
  
  
  icu::SimpleDateFormat* CreateICUDateFormat(
      Isolate* isolate,
      const icu::Locale& icu_locale,
      Handle<JSObject> options) {
    // Create time zone as specified by the user. We have to re-create time zone
    // since calendar takes ownership.
    icu::TimeZone* tz = NULL;
    icu::UnicodeString timezone;
    if (ExtractStringSetting(isolate, options, "timeZone", &timezone)) {
      tz = icu::TimeZone::createTimeZone(timezone);
    } else {
      tz = icu::TimeZone::createDefault();
    }
  
    // Create a calendar using locale, and apply time zone to it.
    UErrorCode status = U_ZERO_ERROR;
    icu::Calendar* calendar =
        icu::Calendar::createInstance(tz, icu_locale, status);
  
    if (calendar->getDynamicClassID() ==
        icu::GregorianCalendar::getStaticClassID()) {
      icu::GregorianCalendar* gc = (icu::GregorianCalendar*)calendar;
      UErrorCode status = U_ZERO_ERROR;
      // The beginning of ECMAScript time, namely -(2**53)
      const double start_of_time = -9007199254740992;
      gc->setGregorianChange(start_of_time, status);
      DCHECK(U_SUCCESS(status));
    }
  
    // Make formatter from skeleton. Calendar and numbering system are added
    // to the locale as Unicode extension (if they were specified at all).
    icu::SimpleDateFormat* date_format = NULL;
    icu::UnicodeString skeleton;
    if (ExtractStringSetting(isolate, options, "skeleton", &skeleton)) {
      std::unique_ptr<icu::DateTimePatternGenerator> generator(
          icu::DateTimePatternGenerator::createInstance(icu_locale, status));
      icu::UnicodeString pattern;
      if (U_SUCCESS(status))
        pattern = generator->getBestPattern(skeleton, status);
  
      date_format = new icu::SimpleDateFormat(pattern, icu_locale, status);
      if (U_SUCCESS(status)) {
        date_format->adoptCalendar(calendar);
      }
    }
  
    if (U_FAILURE(status)) {
      delete calendar;
      delete date_format;
      date_format = nullptr;
    }
  
    return date_format;
  }
  
  
  void SetResolvedDateSettings(Isolate* isolate,
                               const icu::Locale& icu_locale,
                               icu::SimpleDateFormat* date_format,
                               Handle<JSObject> resolved) {
    Factory* factory = isolate->factory();
    UErrorCode status = U_ZERO_ERROR;
    icu::UnicodeString pattern;
    date_format->toPattern(pattern);
    JSObject::SetProperty(
        resolved, factory->intl_pattern_symbol(),
        factory->NewStringFromTwoByte(
                     Vector<const uint16_t>(
                         reinterpret_cast<const uint16_t*>(pattern.getBuffer()),
                         pattern.length())).ToHandleChecked(),
        SLOPPY).Assert();
  
    // Set time zone and calendar.
    const icu::Calendar* calendar = date_format->getCalendar();
    // getType() returns legacy calendar type name instead of LDML/BCP47 calendar
    // key values. i18n.js maps them to BCP47 values for key "ca".
    // TODO(jshin): Consider doing it here, instead.
    const char* calendar_name = calendar->getType();
    JSObject::SetProperty(resolved, factory->NewStringFromStaticChars("calendar"),
                          factory->NewStringFromAsciiChecked(calendar_name),
                          SLOPPY).Assert();
  
    const icu::TimeZone& tz = calendar->getTimeZone();
    icu::UnicodeString time_zone;
    tz.getID(time_zone);
  
    icu::UnicodeString canonical_time_zone;
    icu::TimeZone::getCanonicalID(time_zone, canonical_time_zone, status);
    if (U_SUCCESS(status)) {
      if (canonical_time_zone == UNICODE_STRING_SIMPLE("Etc/GMT")) {
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("timeZone"),
            factory->NewStringFromStaticChars("UTC"), SLOPPY).Assert();
      } else {
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("timeZone"),
            factory->NewStringFromTwoByte(
                         Vector<const uint16_t>(
                             reinterpret_cast<const uint16_t*>(
                                 canonical_time_zone.getBuffer()),
                             canonical_time_zone.length())).ToHandleChecked(),
            SLOPPY).Assert();
      }
    }
  
    // Ugly hack. ICU doesn't expose numbering system in any way, so we have
    // to assume that for given locale NumberingSystem constructor produces the
    // same digits as NumberFormat/Calendar would.
    status = U_ZERO_ERROR;
    icu::NumberingSystem* numbering_system =
        icu::NumberingSystem::createInstance(icu_locale, status);
    if (U_SUCCESS(status)) {
      const char* ns = numbering_system->getName();
      JSObject::SetProperty(
          resolved, factory->NewStringFromStaticChars("numberingSystem"),
          factory->NewStringFromAsciiChecked(ns), SLOPPY).Assert();
    } else {
      JSObject::SetProperty(resolved,
                            factory->NewStringFromStaticChars("numberingSystem"),
                            factory->undefined_value(), SLOPPY).Assert();
    }
    delete numbering_system;
  
    // Set the locale
    char result[ULOC_FULLNAME_CAPACITY];
    status = U_ZERO_ERROR;
    uloc_toLanguageTag(
        icu_locale.getName(), result, ULOC_FULLNAME_CAPACITY, FALSE, &status);
    if (U_SUCCESS(status)) {
      JSObject::SetProperty(resolved, factory->NewStringFromStaticChars("locale"),
                            factory->NewStringFromAsciiChecked(result),
                            SLOPPY).Assert();
    } else {
      // This would never happen, since we got the locale from ICU.
      JSObject::SetProperty(resolved, factory->NewStringFromStaticChars("locale"),
                            factory->NewStringFromStaticChars("und"),
                            SLOPPY).Assert();
    }
  }
  
  
  icu::DecimalFormat* CreateICUNumberFormat(
      Isolate* isolate,
      const icu::Locale& icu_locale,
      Handle<JSObject> options) {
    // Make formatter from options. Numbering system is added
    // to the locale as Unicode extension (if it was specified at all).
    UErrorCode status = U_ZERO_ERROR;
    icu::DecimalFormat* number_format = NULL;
    icu::UnicodeString style;
    icu::UnicodeString currency;
    if (ExtractStringSetting(isolate, options, "style", &style)) {
      if (style == UNICODE_STRING_SIMPLE("currency")) {
        icu::UnicodeString display;
        ExtractStringSetting(isolate, options, "currency", &currency);
        ExtractStringSetting(isolate, options, "currencyDisplay", &display);
  
  #if (U_ICU_VERSION_MAJOR_NUM == 4) && (U_ICU_VERSION_MINOR_NUM <= 6)
        icu::NumberFormat::EStyles format_style;
        if (display == UNICODE_STRING_SIMPLE("code")) {
          format_style = icu::NumberFormat::kIsoCurrencyStyle;
        } else if (display == UNICODE_STRING_SIMPLE("name")) {
          format_style = icu::NumberFormat::kPluralCurrencyStyle;
        } else {
          format_style = icu::NumberFormat::kCurrencyStyle;
        }
  #else  // ICU version is 4.8 or above (we ignore versions below 4.0).
        UNumberFormatStyle format_style;
        if (display == UNICODE_STRING_SIMPLE("code")) {
          format_style = UNUM_CURRENCY_ISO;
        } else if (display == UNICODE_STRING_SIMPLE("name")) {
          format_style = UNUM_CURRENCY_PLURAL;
        } else {
          format_style = UNUM_CURRENCY;
        }
  #endif
  
        number_format = static_cast<icu::DecimalFormat*>(
            icu::NumberFormat::createInstance(icu_locale, format_style, status));
  
        if (U_FAILURE(status)) {
          delete number_format;
          return NULL;
        }
  
        UErrorCode status_digits = U_ZERO_ERROR;
        uint32_t fraction_digits = ucurr_getDefaultFractionDigits(
          currency.getTerminatedBuffer(), &status_digits);
        if (U_SUCCESS(status_digits)) {
          number_format->setMinimumFractionDigits(fraction_digits);
          number_format->setMaximumFractionDigits(fraction_digits);
        } else {
          // Set min & max to default values (previously in i18n.js)
          number_format->setMinimumFractionDigits(0);
          number_format->setMaximumFractionDigits(3);
        }
      } else if (style == UNICODE_STRING_SIMPLE("percent")) {
        number_format = static_cast<icu::DecimalFormat*>(
            icu::NumberFormat::createPercentInstance(icu_locale, status));
        if (U_FAILURE(status)) {
          delete number_format;
          return NULL;
        }
        // Make sure 1.1% doesn't go into 2%.
        number_format->setMinimumFractionDigits(1);
      } else {
        // Make a decimal instance by default.
        number_format = static_cast<icu::DecimalFormat*>(
            icu::NumberFormat::createInstance(icu_locale, status));
      }
    }
  
    if (U_FAILURE(status)) {
      delete number_format;
      return NULL;
    }
  
    // Set all options.
    if (!currency.isEmpty()) {
      number_format->setCurrency(currency.getBuffer(), status);
    }
  
    int32_t digits;
    if (ExtractIntegerSetting(
            isolate, options, "minimumIntegerDigits", &digits)) {
      number_format->setMinimumIntegerDigits(digits);
    }
  
    if (ExtractIntegerSetting(
            isolate, options, "minimumFractionDigits", &digits)) {
      number_format->setMinimumFractionDigits(digits);
    }
  
    if (ExtractIntegerSetting(
            isolate, options, "maximumFractionDigits", &digits)) {
      number_format->setMaximumFractionDigits(digits);
    }
  
    bool significant_digits_used = false;
    if (ExtractIntegerSetting(
            isolate, options, "minimumSignificantDigits", &digits)) {
      number_format->setMinimumSignificantDigits(digits);
      significant_digits_used = true;
    }
  
    if (ExtractIntegerSetting(
            isolate, options, "maximumSignificantDigits", &digits)) {
      number_format->setMaximumSignificantDigits(digits);
      significant_digits_used = true;
    }
  
    number_format->setSignificantDigitsUsed(significant_digits_used);
  
    bool grouping;
    if (ExtractBooleanSetting(isolate, options, "useGrouping", &grouping)) {
      number_format->setGroupingUsed(grouping);
    }
  
    // Set rounding mode.
    number_format->setRoundingMode(icu::DecimalFormat::kRoundHalfUp);
  
    return number_format;
  }
  
  
  void SetResolvedNumberSettings(Isolate* isolate,
                                 const icu::Locale& icu_locale,
                                 icu::DecimalFormat* number_format,
                                 Handle<JSObject> resolved) {
    Factory* factory = isolate->factory();
    icu::UnicodeString pattern;
    number_format->toPattern(pattern);
    JSObject::SetProperty(
        resolved, factory->intl_pattern_symbol(),
        factory->NewStringFromTwoByte(
                     Vector<const uint16_t>(
                         reinterpret_cast<const uint16_t*>(pattern.getBuffer()),
                         pattern.length())).ToHandleChecked(),
        SLOPPY).Assert();
  
    // Set resolved currency code in options.currency if not empty.
    icu::UnicodeString currency(number_format->getCurrency());
    if (!currency.isEmpty()) {
      JSObject::SetProperty(
          resolved, factory->NewStringFromStaticChars("currency"),
          factory->NewStringFromTwoByte(Vector<const uint16_t>(
                                            reinterpret_cast<const uint16_t*>(
                                                currency.getBuffer()),
                                            currency.length())).ToHandleChecked(),
          SLOPPY).Assert();
    }
  
    // Ugly hack. ICU doesn't expose numbering system in any way, so we have
    // to assume that for given locale NumberingSystem constructor produces the
    // same digits as NumberFormat/Calendar would.
    UErrorCode status = U_ZERO_ERROR;
    icu::NumberingSystem* numbering_system =
        icu::NumberingSystem::createInstance(icu_locale, status);
    if (U_SUCCESS(status)) {
      const char* ns = numbering_system->getName();
      JSObject::SetProperty(
          resolved, factory->NewStringFromStaticChars("numberingSystem"),
          factory->NewStringFromAsciiChecked(ns), SLOPPY).Assert();
    } else {
      JSObject::SetProperty(resolved,
                            factory->NewStringFromStaticChars("numberingSystem"),
                            factory->undefined_value(), SLOPPY).Assert();
    }
    delete numbering_system;
  
    JSObject::SetProperty(
        resolved, factory->NewStringFromStaticChars("useGrouping"),
        factory->ToBoolean(number_format->isGroupingUsed()), SLOPPY).Assert();
  
    JSObject::SetProperty(
        resolved, factory->NewStringFromStaticChars("minimumIntegerDigits"),
        factory->NewNumberFromInt(number_format->getMinimumIntegerDigits()),
        SLOPPY).Assert();
  
    JSObject::SetProperty(
        resolved, factory->NewStringFromStaticChars("minimumFractionDigits"),
        factory->NewNumberFromInt(number_format->getMinimumFractionDigits()),
        SLOPPY).Assert();
  
    JSObject::SetProperty(
        resolved, factory->NewStringFromStaticChars("maximumFractionDigits"),
        factory->NewNumberFromInt(number_format->getMaximumFractionDigits()),
        SLOPPY).Assert();
  
    Handle<String> key =
        factory->NewStringFromStaticChars("minimumSignificantDigits");
    Maybe<bool> maybe = JSReceiver::HasOwnProperty(resolved, key);
    CHECK(maybe.IsJust());
    if (maybe.FromJust()) {
      JSObject::SetProperty(
          resolved, factory->NewStringFromStaticChars("minimumSignificantDigits"),
          factory->NewNumberFromInt(number_format->getMinimumSignificantDigits()),
          SLOPPY).Assert();
    }
  
    key = factory->NewStringFromStaticChars("maximumSignificantDigits");
    maybe = JSReceiver::HasOwnProperty(resolved, key);
    CHECK(maybe.IsJust());
    if (maybe.FromJust()) {
      JSObject::SetProperty(
          resolved, factory->NewStringFromStaticChars("maximumSignificantDigits"),
          factory->NewNumberFromInt(number_format->getMaximumSignificantDigits()),
          SLOPPY).Assert();
    }
  
    // Set the locale
    char result[ULOC_FULLNAME_CAPACITY];
    status = U_ZERO_ERROR;
    uloc_toLanguageTag(
        icu_locale.getName(), result, ULOC_FULLNAME_CAPACITY, FALSE, &status);
    if (U_SUCCESS(status)) {
      JSObject::SetProperty(resolved, factory->NewStringFromStaticChars("locale"),
                            factory->NewStringFromAsciiChecked(result),
                            SLOPPY).Assert();
    } else {
      // This would never happen, since we got the locale from ICU.
      JSObject::SetProperty(resolved, factory->NewStringFromStaticChars("locale"),
                            factory->NewStringFromStaticChars("und"),
                            SLOPPY).Assert();
    }
  }
  
  
  icu::Collator* CreateICUCollator(
      Isolate* isolate,
      const icu::Locale& icu_locale,
      Handle<JSObject> options) {
    // Make collator from options.
    icu::Collator* collator = NULL;
    UErrorCode status = U_ZERO_ERROR;
    collator = icu::Collator::createInstance(icu_locale, status);
  
    if (U_FAILURE(status)) {
      delete collator;
      return NULL;
    }
  
    // Set flags first, and then override them with sensitivity if necessary.
    bool numeric;
    if (ExtractBooleanSetting(isolate, options, "numeric", &numeric)) {
      collator->setAttribute(
          UCOL_NUMERIC_COLLATION, numeric ? UCOL_ON : UCOL_OFF, status);
    }
  
    // Normalization is always on, by the spec. We are free to optimize
    // if the strings are already normalized (but we don't have a way to tell
    // that right now).
    collator->setAttribute(UCOL_NORMALIZATION_MODE, UCOL_ON, status);
  
    icu::UnicodeString case_first;
    if (ExtractStringSetting(isolate, options, "caseFirst", &case_first)) {
      if (case_first == UNICODE_STRING_SIMPLE("upper")) {
        collator->setAttribute(UCOL_CASE_FIRST, UCOL_UPPER_FIRST, status);
      } else if (case_first == UNICODE_STRING_SIMPLE("lower")) {
        collator->setAttribute(UCOL_CASE_FIRST, UCOL_LOWER_FIRST, status);
      } else {
        // Default (false/off).
        collator->setAttribute(UCOL_CASE_FIRST, UCOL_OFF, status);
      }
    }
  
    icu::UnicodeString sensitivity;
    if (ExtractStringSetting(isolate, options, "sensitivity", &sensitivity)) {
      if (sensitivity == UNICODE_STRING_SIMPLE("base")) {
        collator->setStrength(icu::Collator::PRIMARY);
      } else if (sensitivity == UNICODE_STRING_SIMPLE("accent")) {
        collator->setStrength(icu::Collator::SECONDARY);
      } else if (sensitivity == UNICODE_STRING_SIMPLE("case")) {
        collator->setStrength(icu::Collator::PRIMARY);
        collator->setAttribute(UCOL_CASE_LEVEL, UCOL_ON, status);
      } else {
        // variant (default)
        collator->setStrength(icu::Collator::TERTIARY);
      }
    }
  
    bool ignore;
    if (ExtractBooleanSetting(isolate, options, "ignorePunctuation", &ignore)) {
      if (ignore) {
        collator->setAttribute(UCOL_ALTERNATE_HANDLING, UCOL_SHIFTED, status);
      }
    }
  
    return collator;
  }
  
  
  void SetResolvedCollatorSettings(Isolate* isolate,
                                   const icu::Locale& icu_locale,
                                   icu::Collator* collator,
                                   Handle<JSObject> resolved) {
    Factory* factory = isolate->factory();
    UErrorCode status = U_ZERO_ERROR;
  
    JSObject::SetProperty(
        resolved, factory->NewStringFromStaticChars("numeric"),
        factory->ToBoolean(
            collator->getAttribute(UCOL_NUMERIC_COLLATION, status) == UCOL_ON),
        SLOPPY).Assert();
  
    switch (collator->getAttribute(UCOL_CASE_FIRST, status)) {
      case UCOL_LOWER_FIRST:
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("caseFirst"),
            factory->NewStringFromStaticChars("lower"), SLOPPY).Assert();
        break;
      case UCOL_UPPER_FIRST:
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("caseFirst"),
            factory->NewStringFromStaticChars("upper"), SLOPPY).Assert();
        break;
      default:
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("caseFirst"),
            factory->NewStringFromStaticChars("false"), SLOPPY).Assert();
    }
  
    switch (collator->getAttribute(UCOL_STRENGTH, status)) {
      case UCOL_PRIMARY: {
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("strength"),
            factory->NewStringFromStaticChars("primary"), SLOPPY).Assert();
  
        // case level: true + s1 -> case, s1 -> base.
        if (UCOL_ON == collator->getAttribute(UCOL_CASE_LEVEL, status)) {
          JSObject::SetProperty(
              resolved, factory->NewStringFromStaticChars("sensitivity"),
              factory->NewStringFromStaticChars("case"), SLOPPY).Assert();
        } else {
          JSObject::SetProperty(
              resolved, factory->NewStringFromStaticChars("sensitivity"),
              factory->NewStringFromStaticChars("base"), SLOPPY).Assert();
        }
        break;
      }
      case UCOL_SECONDARY:
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("strength"),
            factory->NewStringFromStaticChars("secondary"), SLOPPY).Assert();
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("sensitivity"),
            factory->NewStringFromStaticChars("accent"), SLOPPY).Assert();
        break;
      case UCOL_TERTIARY:
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("strength"),
            factory->NewStringFromStaticChars("tertiary"), SLOPPY).Assert();
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("sensitivity"),
            factory->NewStringFromStaticChars("variant"), SLOPPY).Assert();
        break;
      case UCOL_QUATERNARY:
        // We shouldn't get quaternary and identical from ICU, but if we do
        // put them into variant.
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("strength"),
            factory->NewStringFromStaticChars("quaternary"), SLOPPY).Assert();
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("sensitivity"),
            factory->NewStringFromStaticChars("variant"), SLOPPY).Assert();
        break;
      default:
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("strength"),
            factory->NewStringFromStaticChars("identical"), SLOPPY).Assert();
        JSObject::SetProperty(
            resolved, factory->NewStringFromStaticChars("sensitivity"),
            factory->NewStringFromStaticChars("variant"), SLOPPY).Assert();
    }
  
    JSObject::SetProperty(
        resolved, factory->NewStringFromStaticChars("ignorePunctuation"),
        factory->ToBoolean(collator->getAttribute(UCOL_ALTERNATE_HANDLING,
                                                  status) == UCOL_SHIFTED),
        SLOPPY).Assert();
  
    // Set the locale
    char result[ULOC_FULLNAME_CAPACITY];
    status = U_ZERO_ERROR;
    uloc_toLanguageTag(
        icu_locale.getName(), result, ULOC_FULLNAME_CAPACITY, FALSE, &status);
    if (U_SUCCESS(status)) {
      JSObject::SetProperty(resolved, factory->NewStringFromStaticChars("locale"),
                            factory->NewStringFromAsciiChecked(result),
                            SLOPPY).Assert();
    } else {
      // This would never happen, since we got the locale from ICU.
      JSObject::SetProperty(resolved, factory->NewStringFromStaticChars("locale"),
                            factory->NewStringFromStaticChars("und"),
                            SLOPPY).Assert();
    }
  }
  
  
  icu::BreakIterator* CreateICUBreakIterator(
      Isolate* isolate,
      const icu::Locale& icu_locale,
      Handle<JSObject> options) {
    UErrorCode status = U_ZERO_ERROR;
    icu::BreakIterator* break_iterator = NULL;
    icu::UnicodeString type;
    if (!ExtractStringSetting(isolate, options, "type", &type)) return NULL;
  
    if (type == UNICODE_STRING_SIMPLE("character")) {
      break_iterator =
        icu::BreakIterator::createCharacterInstance(icu_locale, status);
    } else if (type == UNICODE_STRING_SIMPLE("sentence")) {
      break_iterator =
        icu::BreakIterator::createSentenceInstance(icu_locale, status);
    } else if (type == UNICODE_STRING_SIMPLE("line")) {
      break_iterator =
        icu::BreakIterator::createLineInstance(icu_locale, status);
    } else {
      // Defualt is word iterator.
      break_iterator =
        icu::BreakIterator::createWordInstance(icu_locale, status);
    }
  
    if (U_FAILURE(status)) {
      delete break_iterator;
      return NULL;
    }
  
    isolate->CountUsage(v8::Isolate::UseCounterFeature::kBreakIterator);
  
    return break_iterator;
  }
  
  
  void SetResolvedBreakIteratorSettings(Isolate* isolate,
                                        const icu::Locale& icu_locale,
                                        icu::BreakIterator* break_iterator,
                                        Handle<JSObject> resolved) {
    Factory* factory = isolate->factory();
    UErrorCode status = U_ZERO_ERROR;
  
    // Set the locale
    char result[ULOC_FULLNAME_CAPACITY];
    status = U_ZERO_ERROR;
    uloc_toLanguageTag(
        icu_locale.getName(), result, ULOC_FULLNAME_CAPACITY, FALSE, &status);
    if (U_SUCCESS(status)) {
      JSObject::SetProperty(resolved, factory->NewStringFromStaticChars("locale"),
                            factory->NewStringFromAsciiChecked(result),
                            SLOPPY).Assert();
    } else {
      // This would never happen, since we got the locale from ICU.
      JSObject::SetProperty(resolved, factory->NewStringFromStaticChars("locale"),
                            factory->NewStringFromStaticChars("und"),
                            SLOPPY).Assert();
    }
  }
  
  }  // namespace
  
  
  // static
  icu::SimpleDateFormat* DateFormat::InitializeDateTimeFormat(
      Isolate* isolate,
      Handle<String> locale,
      Handle<JSObject> options,
      Handle<JSObject> resolved) {
    // Convert BCP47 into ICU locale format.
    UErrorCode status = U_ZERO_ERROR;
    icu::Locale icu_locale;
    char icu_result[ULOC_FULLNAME_CAPACITY];
    int icu_length = 0;
    v8::String::Utf8Value bcp47_locale(v8::Utils::ToLocal(locale));
    if (bcp47_locale.length() != 0) {
      uloc_forLanguageTag(*bcp47_locale, icu_result, ULOC_FULLNAME_CAPACITY,
                          &icu_length, &status);
      if (U_FAILURE(status) || icu_length == 0) {
        return NULL;
      }
      icu_locale = icu::Locale(icu_result);
    }
  
    icu::SimpleDateFormat* date_format = CreateICUDateFormat(
        isolate, icu_locale, options);
    if (!date_format) {
      // Remove extensions and try again.
      icu::Locale no_extension_locale(icu_locale.getBaseName());
      date_format = CreateICUDateFormat(isolate, no_extension_locale, options);
  
      if (!date_format) {
        FATAL("Failed to create ICU date format, are ICU data files missing?");
      }
  
      // Set resolved settings (pattern, numbering system, calendar).
      SetResolvedDateSettings(
          isolate, no_extension_locale, date_format, resolved);
    } else {
      SetResolvedDateSettings(isolate, icu_locale, date_format, resolved);
    }
  
    return date_format;
  }
  
  
  icu::SimpleDateFormat* DateFormat::UnpackDateFormat(
      Isolate* isolate,
      Handle<JSObject> obj) {
    return reinterpret_cast<icu::SimpleDateFormat*>(obj->GetInternalField(0));
  }
  
  void DateFormat::DeleteDateFormat(const v8::WeakCallbackInfo<void>& data) {
    delete reinterpret_cast<icu::SimpleDateFormat*>(data.GetInternalField(0));
    GlobalHandles::Destroy(reinterpret_cast<Object**>(data.GetParameter()));
  }
  
  
  icu::DecimalFormat* NumberFormat::InitializeNumberFormat(
      Isolate* isolate,
      Handle<String> locale,
      Handle<JSObject> options,
      Handle<JSObject> resolved) {
    // Convert BCP47 into ICU locale format.
    UErrorCode status = U_ZERO_ERROR;
    icu::Locale icu_locale;
    char icu_result[ULOC_FULLNAME_CAPACITY];
    int icu_length = 0;
    v8::String::Utf8Value bcp47_locale(v8::Utils::ToLocal(locale));
    if (bcp47_locale.length() != 0) {
      uloc_forLanguageTag(*bcp47_locale, icu_result, ULOC_FULLNAME_CAPACITY,
                          &icu_length, &status);
      if (U_FAILURE(status) || icu_length == 0) {
        return NULL;
      }
      icu_locale = icu::Locale(icu_result);
    }
  
    icu::DecimalFormat* number_format =
        CreateICUNumberFormat(isolate, icu_locale, options);
    if (!number_format) {
      // Remove extensions and try again.
      icu::Locale no_extension_locale(icu_locale.getBaseName());
      number_format = CreateICUNumberFormat(
          isolate, no_extension_locale, options);
  
      if (!number_format) {
        FATAL("Failed to create ICU number format, are ICU data files missing?");
      }
  
      // Set resolved settings (pattern, numbering system).
      SetResolvedNumberSettings(
          isolate, no_extension_locale, number_format, resolved);
    } else {
      SetResolvedNumberSettings(isolate, icu_locale, number_format, resolved);
    }
  
    return number_format;
  }
  
  
  icu::DecimalFormat* NumberFormat::UnpackNumberFormat(
      Isolate* isolate,
      Handle<JSObject> obj) {
    return reinterpret_cast<icu::DecimalFormat*>(obj->GetInternalField(0));
  }
  
  void NumberFormat::DeleteNumberFormat(const v8::WeakCallbackInfo<void>& data) {
    delete reinterpret_cast<icu::DecimalFormat*>(data.GetInternalField(0));
    GlobalHandles::Destroy(reinterpret_cast<Object**>(data.GetParameter()));
  }
  
  
  icu::Collator* Collator::InitializeCollator(
      Isolate* isolate,
      Handle<String> locale,
      Handle<JSObject> options,
      Handle<JSObject> resolved) {
    // Convert BCP47 into ICU locale format.
    UErrorCode status = U_ZERO_ERROR;
    icu::Locale icu_locale;
    char icu_result[ULOC_FULLNAME_CAPACITY];
    int icu_length = 0;
    v8::String::Utf8Value bcp47_locale(v8::Utils::ToLocal(locale));
    if (bcp47_locale.length() != 0) {
      uloc_forLanguageTag(*bcp47_locale, icu_result, ULOC_FULLNAME_CAPACITY,
                          &icu_length, &status);
      if (U_FAILURE(status) || icu_length == 0) {
        return NULL;
      }
      icu_locale = icu::Locale(icu_result);
    }
  
    icu::Collator* collator = CreateICUCollator(isolate, icu_locale, options);
    if (!collator) {
      // Remove extensions and try again.
      icu::Locale no_extension_locale(icu_locale.getBaseName());
      collator = CreateICUCollator(isolate, no_extension_locale, options);
  
      if (!collator) {
        FATAL("Failed to create ICU collator, are ICU data files missing?");
      }
  
      // Set resolved settings (pattern, numbering system).
      SetResolvedCollatorSettings(
          isolate, no_extension_locale, collator, resolved);
    } else {
      SetResolvedCollatorSettings(isolate, icu_locale, collator, resolved);
    }
  
    return collator;
  }
  
  
  icu::Collator* Collator::UnpackCollator(Isolate* isolate,
                                          Handle<JSObject> obj) {
    return reinterpret_cast<icu::Collator*>(obj->GetInternalField(0));
  }
  
  void Collator::DeleteCollator(const v8::WeakCallbackInfo<void>& data) {
    delete reinterpret_cast<icu::Collator*>(data.GetInternalField(0));
    GlobalHandles::Destroy(reinterpret_cast<Object**>(data.GetParameter()));
  }
  
  icu::BreakIterator* V8BreakIterator::InitializeBreakIterator(
      Isolate* isolate, Handle<String> locale, Handle<JSObject> options,
      Handle<JSObject> resolved) {
    // Convert BCP47 into ICU locale format.
    UErrorCode status = U_ZERO_ERROR;
    icu::Locale icu_locale;
    char icu_result[ULOC_FULLNAME_CAPACITY];
    int icu_length = 0;
    v8::String::Utf8Value bcp47_locale(v8::Utils::ToLocal(locale));
    if (bcp47_locale.length() != 0) {
      uloc_forLanguageTag(*bcp47_locale, icu_result, ULOC_FULLNAME_CAPACITY,
                          &icu_length, &status);
      if (U_FAILURE(status) || icu_length == 0) {
        return NULL;
      }
      icu_locale = icu::Locale(icu_result);
    }
  
    icu::BreakIterator* break_iterator = CreateICUBreakIterator(
        isolate, icu_locale, options);
    if (!break_iterator) {
      // Remove extensions and try again.
      icu::Locale no_extension_locale(icu_locale.getBaseName());
      break_iterator = CreateICUBreakIterator(
          isolate, no_extension_locale, options);
  
      if (!break_iterator) {
        FATAL("Failed to create ICU break iterator, are ICU data files missing?");
      }
  
      // Set resolved settings (locale).
      SetResolvedBreakIteratorSettings(
          isolate, no_extension_locale, break_iterator, resolved);
    } else {
      SetResolvedBreakIteratorSettings(
          isolate, icu_locale, break_iterator, resolved);
    }
  
    return break_iterator;
  }
  
  icu::BreakIterator* V8BreakIterator::UnpackBreakIterator(Isolate* isolate,
                                                           Handle<JSObject> obj) {
    return reinterpret_cast<icu::BreakIterator*>(obj->GetInternalField(0));
  }
  
  void V8BreakIterator::DeleteBreakIterator(
      const v8::WeakCallbackInfo<void>& data) {
    delete reinterpret_cast<icu::BreakIterator*>(data.GetInternalField(0));
    delete reinterpret_cast<icu::UnicodeString*>(data.GetInternalField(1));
    GlobalHandles::Destroy(reinterpret_cast<Object**>(data.GetParameter()));
  }
  
  }  // namespace internal
  }  // namespace v8
  