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-rw-r--r--js/src/builtin/intl/Locale.cpp1416
1 files changed, 1416 insertions, 0 deletions
diff --git a/js/src/builtin/intl/Locale.cpp b/js/src/builtin/intl/Locale.cpp
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index 0000000000..70c28823b5
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+++ b/js/src/builtin/intl/Locale.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Intl.Locale implementation. */
+
+#include "builtin/intl/Locale.h"
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/Casting.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/Span.h"
+#include "mozilla/TextUtils.h"
+
+#include <algorithm>
+#include <iterator>
+#include <string>
+#include <string.h>
+#include <utility>
+
+#include "jsapi.h"
+#include "jsfriendapi.h"
+
+#include "builtin/Boolean.h"
+#include "builtin/intl/CommonFunctions.h"
+#include "builtin/intl/LanguageTag.h"
+#include "builtin/String.h"
+#include "gc/Rooting.h"
+#include "js/Conversions.h"
+#include "js/friend/ErrorMessages.h" // js::GetErrorMessage, JSMSG_*
+#include "js/TypeDecls.h"
+#include "js/Wrapper.h"
+#include "util/StringBuffer.h"
+#include "vm/GlobalObject.h"
+#include "vm/JSContext.h"
+#include "vm/PlainObject.h" // js::PlainObject
+#include "vm/Printer.h"
+#include "vm/StringType.h"
+
+#include "vm/JSObject-inl.h"
+#include "vm/NativeObject-inl.h"
+
+using namespace js;
+using namespace js::intl::LanguageTagLimits;
+
+using intl::LanguageTag;
+using intl::LanguageTagParser;
+
+const JSClass LocaleObject::class_ = {
+ "Intl.Locale",
+ JSCLASS_HAS_RESERVED_SLOTS(LocaleObject::SLOT_COUNT) |
+ JSCLASS_HAS_CACHED_PROTO(JSProto_Locale),
+ JS_NULL_CLASS_OPS, &LocaleObject::classSpec_};
+
+const JSClass& LocaleObject::protoClass_ = PlainObject::class_;
+
+static inline bool IsLocale(HandleValue v) {
+ return v.isObject() && v.toObject().is<LocaleObject>();
+}
+
+// Return the length of the base-name subtags.
+static size_t BaseNameLength(const LanguageTag& tag) {
+ size_t baseNameLength = tag.language().length();
+ if (tag.script().present()) {
+ baseNameLength += 1 + tag.script().length();
+ }
+ if (tag.region().present()) {
+ baseNameLength += 1 + tag.region().length();
+ }
+ for (const auto& variant : tag.variants()) {
+ baseNameLength += 1 + strlen(variant.get());
+ }
+ return baseNameLength;
+}
+
+struct IndexAndLength {
+ size_t index;
+ size_t length;
+
+ IndexAndLength(size_t index, size_t length) : index(index), length(length){};
+
+ template <typename T>
+ mozilla::Span<const T> spanOf(const T* ptr) const {
+ return {ptr + index, length};
+ }
+};
+
+// Compute the Unicode extension's index and length in the extension subtag.
+static mozilla::Maybe<IndexAndLength> UnicodeExtensionPosition(
+ const LanguageTag& tag) {
+ size_t index = 0;
+ for (const auto& extension : tag.extensions()) {
+ MOZ_ASSERT(!mozilla::IsAsciiUppercaseAlpha(extension[0]),
+ "extensions are case normalized to lowercase");
+
+ size_t extensionLength = strlen(extension.get());
+ if (extension[0] == 'u') {
+ return mozilla::Some(IndexAndLength{index, extensionLength});
+ }
+
+ // Add +1 to skip over the preceding separator.
+ index += 1 + extensionLength;
+ }
+ return mozilla::Nothing();
+}
+
+static LocaleObject* CreateLocaleObject(JSContext* cx, HandleObject prototype,
+ const LanguageTag& tag) {
+ RootedString tagStr(cx, tag.toString(cx));
+ if (!tagStr) {
+ return nullptr;
+ }
+
+ size_t baseNameLength = BaseNameLength(tag);
+
+ RootedString baseName(cx, NewDependentString(cx, tagStr, 0, baseNameLength));
+ if (!baseName) {
+ return nullptr;
+ }
+
+ RootedValue unicodeExtension(cx, UndefinedValue());
+ if (auto result = UnicodeExtensionPosition(tag)) {
+ JSString* str = NewDependentString(
+ cx, tagStr, baseNameLength + 1 + result->index, result->length);
+ if (!str) {
+ return nullptr;
+ }
+
+ unicodeExtension.setString(str);
+ }
+
+ auto* locale = NewObjectWithClassProto<LocaleObject>(cx, prototype);
+ if (!locale) {
+ return nullptr;
+ }
+
+ locale->setFixedSlot(LocaleObject::LANGUAGE_TAG_SLOT, StringValue(tagStr));
+ locale->setFixedSlot(LocaleObject::BASENAME_SLOT, StringValue(baseName));
+ locale->setFixedSlot(LocaleObject::UNICODE_EXTENSION_SLOT, unicodeExtension);
+
+ return locale;
+}
+
+static inline bool IsValidUnicodeExtensionValue(JSLinearString* linear) {
+ return linear->length() > 0 &&
+ LanguageTagParser::canParseUnicodeExtensionType(linear);
+}
+
+/** Iterate through (sep keyword) in a valid, lowercased Unicode extension. */
+template <typename CharT>
+class SepKeywordIterator {
+ const CharT* iter_;
+ const CharT* const end_;
+
+ public:
+ SepKeywordIterator(const CharT* unicodeExtensionBegin,
+ const CharT* unicodeExtensionEnd)
+ : iter_(unicodeExtensionBegin), end_(unicodeExtensionEnd) {}
+
+ /**
+ * Return (sep keyword) in the Unicode locale extension from begin to end.
+ * The first call after all (sep keyword) are consumed returns |nullptr|; no
+ * further calls are allowed.
+ */
+ const CharT* next() {
+ MOZ_ASSERT(iter_ != nullptr,
+ "can't call next() once it's returned nullptr");
+
+ constexpr size_t SepKeyLength = 1 + UnicodeKeyLength; // "-co"/"-nu"/etc.
+
+ MOZ_ASSERT(iter_ + SepKeyLength <= end_,
+ "overall Unicode locale extension or non-leading subtags must "
+ "be at least key-sized");
+
+ MOZ_ASSERT((iter_[0] == 'u' && iter_[1] == '-') || iter_[0] == '-');
+
+ while (true) {
+ // Skip past '-' so |std::char_traits::find| makes progress. Skipping
+ // 'u' is harmless -- skip or not, |find| returns the first '-'.
+ iter_++;
+
+ // Find the next separator.
+ iter_ = std::char_traits<CharT>::find(
+ iter_, mozilla::PointerRangeSize(iter_, end_), CharT('-'));
+ if (!iter_) {
+ return nullptr;
+ }
+
+ MOZ_ASSERT(iter_ + SepKeyLength <= end_,
+ "non-leading subtags in a Unicode locale extension are all "
+ "at least as long as a key");
+
+ if (iter_ + SepKeyLength == end_ || // key is terminal subtag
+ iter_[SepKeyLength] == '-') { // key is followed by more subtags
+ break;
+ }
+ }
+
+ MOZ_ASSERT(iter_[0] == '-');
+ MOZ_ASSERT(mozilla::IsAsciiLowercaseAlpha(iter_[1]) ||
+ mozilla::IsAsciiDigit(iter_[1]));
+ MOZ_ASSERT(mozilla::IsAsciiLowercaseAlpha(iter_[2]));
+ MOZ_ASSERT_IF(iter_ + SepKeyLength < end_, iter_[SepKeyLength] == '-');
+ return iter_;
+ }
+};
+
+/**
+ * 9.2.10 GetOption ( options, property, type, values, fallback )
+ *
+ * If the requested property is present and not-undefined, set the result string
+ * to |ToString(value)|. Otherwise set the result string to nullptr.
+ */
+static bool GetStringOption(JSContext* cx, HandleObject options,
+ HandlePropertyName name,
+ MutableHandle<JSLinearString*> string) {
+ // Step 1.
+ RootedValue option(cx);
+ if (!GetProperty(cx, options, options, name, &option)) {
+ return false;
+ }
+
+ // Step 2.
+ JSLinearString* linear = nullptr;
+ if (!option.isUndefined()) {
+ // Steps 2.a-b, 2.d (not applicable).
+
+ // Steps 2.c, 2.e.
+ JSString* str = ToString(cx, option);
+ if (!str) {
+ return false;
+ }
+ linear = str->ensureLinear(cx);
+ if (!linear) {
+ return false;
+ }
+ }
+
+ // Step 3.
+ string.set(linear);
+ return true;
+}
+
+/**
+ * 9.2.10 GetOption ( options, property, type, values, fallback )
+ *
+ * If the requested property is present and not-undefined, set the result string
+ * to |ToString(ToBoolean(value))|. Otherwise set the result string to nullptr.
+ */
+static bool GetBooleanOption(JSContext* cx, HandleObject options,
+ HandlePropertyName name,
+ MutableHandle<JSLinearString*> string) {
+ // Step 1.
+ RootedValue option(cx);
+ if (!GetProperty(cx, options, options, name, &option)) {
+ return false;
+ }
+
+ // Step 2.
+ JSLinearString* linear = nullptr;
+ if (!option.isUndefined()) {
+ // Steps 2.a, 2.c-d (not applicable).
+
+ // Steps 2.c, 2.e.
+ linear = BooleanToString(cx, ToBoolean(option));
+ }
+
+ // Step 3.
+ string.set(linear);
+ return true;
+}
+
+/**
+ * ApplyOptionsToTag ( tag, options )
+ */
+static bool ApplyOptionsToTag(JSContext* cx, LanguageTag& tag,
+ HandleObject options) {
+ // Steps 1-2 (Already performed in caller).
+
+ RootedLinearString option(cx);
+
+ // Step 3.
+ if (!GetStringOption(cx, options, cx->names().language, &option)) {
+ return false;
+ }
+
+ // Step 4.
+ intl::LanguageSubtag language;
+ if (option && !intl::ParseStandaloneLanguageTag(option, language)) {
+ if (UniqueChars str = QuoteString(cx, option, '"')) {
+ JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr,
+ JSMSG_INVALID_OPTION_VALUE, "language",
+ str.get());
+ }
+ return false;
+ }
+
+ // Step 5.
+ if (!GetStringOption(cx, options, cx->names().script, &option)) {
+ return false;
+ }
+
+ // Step 6.
+ intl::ScriptSubtag script;
+ if (option && !intl::ParseStandaloneScriptTag(option, script)) {
+ if (UniqueChars str = QuoteString(cx, option, '"')) {
+ JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr,
+ JSMSG_INVALID_OPTION_VALUE, "script",
+ str.get());
+ }
+ return false;
+ }
+
+ // Step 7.
+ if (!GetStringOption(cx, options, cx->names().region, &option)) {
+ return false;
+ }
+
+ // Step 8.
+ intl::RegionSubtag region;
+ if (option && !intl::ParseStandaloneRegionTag(option, region)) {
+ if (UniqueChars str = QuoteString(cx, option, '"')) {
+ JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr,
+ JSMSG_INVALID_OPTION_VALUE, "region",
+ str.get());
+ }
+ return false;
+ }
+
+ // Step 9 (Already performed in caller).
+
+ // Skip steps 10-13 when no subtags were modified.
+ if (language.present() || script.present() || region.present()) {
+ // Step 10.
+ if (language.present()) {
+ tag.setLanguage(language);
+ }
+
+ // Step 11.
+ if (script.present()) {
+ tag.setScript(script);
+ }
+
+ // Step 12.
+ if (region.present()) {
+ tag.setRegion(region);
+ }
+
+ // Step 13.
+ // Optimized to only canonicalize the base-name subtags. All other
+ // canonicalization steps will happen later.
+ if (!tag.canonicalizeBaseName(cx)) {
+ return true;
+ }
+ }
+
+ return true;
+}
+
+/**
+ * ApplyUnicodeExtensionToTag( tag, options, relevantExtensionKeys )
+ */
+bool js::intl::ApplyUnicodeExtensionToTag(
+ JSContext* cx, LanguageTag& tag,
+ JS::HandleVector<intl::UnicodeExtensionKeyword> keywords) {
+ // If no Unicode extensions were present in the options object, we can skip
+ // everything below and directly return.
+ if (keywords.length() == 0) {
+ return true;
+ }
+
+ Vector<char, 32> newExtension(cx);
+ if (!newExtension.append('u')) {
+ return false;
+ }
+
+ // Check if there's an existing Unicode extension subtag.
+
+ const char* unicodeExtensionEnd = nullptr;
+ const char* unicodeExtensionKeywords = nullptr;
+ if (const char* unicodeExtension = tag.unicodeExtension()) {
+ unicodeExtensionEnd = unicodeExtension + strlen(unicodeExtension);
+
+ SepKeywordIterator<char> iter(unicodeExtension, unicodeExtensionEnd);
+
+ // Find the start of the first keyword.
+ unicodeExtensionKeywords = iter.next();
+
+ // Copy any attributes present before the first keyword.
+ const char* attributesEnd = unicodeExtensionKeywords
+ ? unicodeExtensionKeywords
+ : unicodeExtensionEnd;
+ if (!newExtension.append(unicodeExtension + 1, attributesEnd)) {
+ return false;
+ }
+ }
+
+ // Append the new keywords before any existing keywords. That way any previous
+ // keyword with the same key is detected as a duplicate when canonicalizing
+ // the Unicode extension subtag and gets discarded.
+
+ for (const auto& keyword : keywords) {
+ UnicodeExtensionKeyword::UnicodeKeySpan key = keyword.key();
+ if (!newExtension.append('-')) {
+ return false;
+ }
+ if (!newExtension.append(key.data(), key.size())) {
+ return false;
+ }
+ if (!newExtension.append('-')) {
+ return false;
+ }
+
+ JS::AutoCheckCannotGC nogc;
+ JSLinearString* type = keyword.type();
+ if (type->hasLatin1Chars()) {
+ if (!newExtension.append(type->latin1Chars(nogc), type->length())) {
+ return false;
+ }
+ } else {
+ if (!newExtension.append(type->twoByteChars(nogc), type->length())) {
+ return false;
+ }
+ }
+ }
+
+ // Append the remaining keywords from the previous Unicode extension subtag.
+ if (unicodeExtensionKeywords) {
+ if (!newExtension.append(unicodeExtensionKeywords, unicodeExtensionEnd)) {
+ return false;
+ }
+ }
+
+ // Null-terminate the new Unicode extension string.
+ if (!newExtension.append('\0')) {
+ return false;
+ }
+
+ // Insert the new Unicode extension string into the language tag.
+ UniqueChars newExtensionChars(newExtension.extractOrCopyRawBuffer());
+ if (!newExtensionChars) {
+ return false;
+ }
+ return tag.setUnicodeExtension(std::move(newExtensionChars));
+}
+
+static JS::Result<JSString*> LanguageTagFromMaybeWrappedLocale(JSContext* cx,
+ JSObject* obj) {
+ if (obj->is<LocaleObject>()) {
+ return obj->as<LocaleObject>().languageTag();
+ }
+
+ JSObject* unwrapped = CheckedUnwrapStatic(obj);
+ if (!unwrapped) {
+ ReportAccessDenied(cx);
+ return cx->alreadyReportedError();
+ }
+
+ if (!unwrapped->is<LocaleObject>()) {
+ return nullptr;
+ }
+
+ RootedString tagStr(cx, unwrapped->as<LocaleObject>().languageTag());
+ if (!cx->compartment()->wrap(cx, &tagStr)) {
+ return cx->alreadyReportedError();
+ }
+ return tagStr.get();
+}
+
+/**
+ * Intl.Locale( tag[, options] )
+ */
+static bool Locale(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ // Step 1.
+ if (!ThrowIfNotConstructing(cx, args, "Intl.Locale")) {
+ return false;
+ }
+
+ // Steps 2-6 (Inlined 9.1.14, OrdinaryCreateFromConstructor).
+ RootedObject proto(cx);
+ if (!GetPrototypeFromBuiltinConstructor(cx, args, JSProto_Locale, &proto)) {
+ return false;
+ }
+
+ // Steps 7-9.
+ HandleValue tagValue = args.get(0);
+ JSString* tagStr;
+ if (tagValue.isObject()) {
+ JS_TRY_VAR_OR_RETURN_FALSE(
+ cx, tagStr,
+ LanguageTagFromMaybeWrappedLocale(cx, &tagValue.toObject()));
+ if (!tagStr) {
+ tagStr = ToString(cx, tagValue);
+ if (!tagStr) {
+ return false;
+ }
+ }
+ } else if (tagValue.isString()) {
+ tagStr = tagValue.toString();
+ } else {
+ JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
+ JSMSG_INVALID_LOCALES_ELEMENT);
+ return false;
+ }
+
+ RootedLinearString tagLinearStr(cx, tagStr->ensureLinear(cx));
+ if (!tagLinearStr) {
+ return false;
+ }
+
+ // Steps 10-11.
+ RootedObject options(cx);
+ if (args.hasDefined(1)) {
+ options = ToObject(cx, args[1]);
+ if (!options) {
+ return false;
+ }
+ }
+
+ // ApplyOptionsToTag, steps 2 and 9.
+ LanguageTag tag(cx);
+ if (!LanguageTagParser::parse(cx, tagLinearStr, tag)) {
+ return false;
+ }
+
+ if (!tag.canonicalizeBaseName(cx)) {
+ return false;
+ }
+
+ if (options) {
+ // Step 12.
+ if (!ApplyOptionsToTag(cx, tag, options)) {
+ return false;
+ }
+
+ // Step 13.
+ JS::RootedVector<intl::UnicodeExtensionKeyword> keywords(cx);
+
+ // Step 14.
+ RootedLinearString calendar(cx);
+ if (!GetStringOption(cx, options, cx->names().calendar, &calendar)) {
+ return false;
+ }
+
+ // Steps 15-16.
+ if (calendar) {
+ if (!IsValidUnicodeExtensionValue(calendar)) {
+ if (UniqueChars str = QuoteString(cx, calendar, '"')) {
+ JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr,
+ JSMSG_INVALID_OPTION_VALUE, "calendar",
+ str.get());
+ }
+ return false;
+ }
+
+ if (!keywords.emplaceBack("ca", calendar)) {
+ return false;
+ }
+ }
+
+ // Step 17.
+ RootedLinearString collation(cx);
+ if (!GetStringOption(cx, options, cx->names().collation, &collation)) {
+ return false;
+ }
+
+ // Steps 18-19.
+ if (collation) {
+ if (!IsValidUnicodeExtensionValue(collation)) {
+ if (UniqueChars str = QuoteString(cx, collation, '"')) {
+ JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr,
+ JSMSG_INVALID_OPTION_VALUE, "collation",
+ str.get());
+ }
+ return false;
+ }
+
+ if (!keywords.emplaceBack("co", collation)) {
+ return false;
+ }
+ }
+
+ // Step 20 (without validation).
+ RootedLinearString hourCycle(cx);
+ if (!GetStringOption(cx, options, cx->names().hourCycle, &hourCycle)) {
+ return false;
+ }
+
+ // Steps 20-21.
+ if (hourCycle) {
+ if (!StringEqualsLiteral(hourCycle, "h11") &&
+ !StringEqualsLiteral(hourCycle, "h12") &&
+ !StringEqualsLiteral(hourCycle, "h23") &&
+ !StringEqualsLiteral(hourCycle, "h24")) {
+ if (UniqueChars str = QuoteString(cx, hourCycle, '"')) {
+ JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr,
+ JSMSG_INVALID_OPTION_VALUE, "hourCycle",
+ str.get());
+ }
+ return false;
+ }
+
+ if (!keywords.emplaceBack("hc", hourCycle)) {
+ return false;
+ }
+ }
+
+ // Step 22 (without validation).
+ RootedLinearString caseFirst(cx);
+ if (!GetStringOption(cx, options, cx->names().caseFirst, &caseFirst)) {
+ return false;
+ }
+
+ // Steps 22-23.
+ if (caseFirst) {
+ if (!StringEqualsLiteral(caseFirst, "upper") &&
+ !StringEqualsLiteral(caseFirst, "lower") &&
+ !StringEqualsLiteral(caseFirst, "false")) {
+ if (UniqueChars str = QuoteString(cx, caseFirst, '"')) {
+ JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr,
+ JSMSG_INVALID_OPTION_VALUE, "caseFirst",
+ str.get());
+ }
+ return false;
+ }
+
+ if (!keywords.emplaceBack("kf", caseFirst)) {
+ return false;
+ }
+ }
+
+ // Steps 24-25.
+ RootedLinearString numeric(cx);
+ if (!GetBooleanOption(cx, options, cx->names().numeric, &numeric)) {
+ return false;
+ }
+
+ // Step 26.
+ if (numeric) {
+ if (!keywords.emplaceBack("kn", numeric)) {
+ return false;
+ }
+ }
+
+ // Step 27.
+ RootedLinearString numberingSystem(cx);
+ if (!GetStringOption(cx, options, cx->names().numberingSystem,
+ &numberingSystem)) {
+ return false;
+ }
+
+ // Steps 28-29.
+ if (numberingSystem) {
+ if (!IsValidUnicodeExtensionValue(numberingSystem)) {
+ if (UniqueChars str = QuoteString(cx, numberingSystem, '"')) {
+ JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr,
+ JSMSG_INVALID_OPTION_VALUE,
+ "numberingSystem", str.get());
+ }
+ return false;
+ }
+
+ if (!keywords.emplaceBack("nu", numberingSystem)) {
+ return false;
+ }
+ }
+
+ // Step 30.
+ if (!ApplyUnicodeExtensionToTag(cx, tag, keywords)) {
+ return false;
+ }
+ }
+
+ // ApplyOptionsToTag, steps 9 and 13.
+ // ApplyUnicodeExtensionToTag, step 9.
+ if (!tag.canonicalizeExtensions(cx)) {
+ return false;
+ }
+
+ // Steps 6, 31-37.
+ JSObject* obj = CreateLocaleObject(cx, proto, tag);
+ if (!obj) {
+ return false;
+ }
+
+ // Step 38.
+ args.rval().setObject(*obj);
+ return true;
+}
+
+using UnicodeKey = const char (&)[UnicodeKeyLength + 1];
+
+// Returns the tuple [index, length] of the `type` in the `keyword` in Unicode
+// locale extension |extension| that has |key| as its `key`. If `keyword` lacks
+// a type, the returned |index| will be where `type` would have been, and
+// |length| will be set to zero.
+template <typename CharT>
+static mozilla::Maybe<IndexAndLength> FindUnicodeExtensionType(
+ const CharT* extension, size_t length, UnicodeKey key) {
+ MOZ_ASSERT(extension[0] == 'u');
+ MOZ_ASSERT(extension[1] == '-');
+
+ const CharT* end = extension + length;
+
+ SepKeywordIterator<CharT> iter(extension, end);
+
+ // Search all keywords until a match was found.
+ const CharT* beginKey;
+ while (true) {
+ beginKey = iter.next();
+ if (!beginKey) {
+ return mozilla::Nothing();
+ }
+
+ // Add +1 to skip over the separator preceding the keyword.
+ MOZ_ASSERT(beginKey[0] == '-');
+ beginKey++;
+
+ // Exit the loop on the first match.
+ if (std::equal(beginKey, beginKey + UnicodeKeyLength, key)) {
+ break;
+ }
+ }
+
+ // Skip over the key.
+ const CharT* beginType = beginKey + UnicodeKeyLength;
+
+ // Find the start of the next keyword.
+ const CharT* endType = iter.next();
+
+ // No further keyword present, the current keyword ends the Unicode extension.
+ if (!endType) {
+ endType = end;
+ }
+
+ // If the keyword has a type, skip over the separator preceding the type.
+ if (beginType != endType) {
+ MOZ_ASSERT(beginType[0] == '-');
+ beginType++;
+ }
+ return mozilla::Some(IndexAndLength{size_t(beginType - extension),
+ size_t(endType - beginType)});
+}
+
+static inline auto FindUnicodeExtensionType(JSLinearString* unicodeExtension,
+ UnicodeKey key) {
+ JS::AutoCheckCannotGC nogc;
+ return unicodeExtension->hasLatin1Chars()
+ ? FindUnicodeExtensionType(unicodeExtension->latin1Chars(nogc),
+ unicodeExtension->length(), key)
+ : FindUnicodeExtensionType(unicodeExtension->twoByteChars(nogc),
+ unicodeExtension->length(), key);
+}
+
+// Return the sequence of types for the Unicode extension keyword specified by
+// key or undefined when the keyword isn't present.
+static bool GetUnicodeExtension(JSContext* cx, LocaleObject* locale,
+ UnicodeKey key, MutableHandleValue value) {
+ // Return undefined when no Unicode extension subtag is present.
+ const Value& unicodeExtensionValue = locale->unicodeExtension();
+ if (unicodeExtensionValue.isUndefined()) {
+ value.setUndefined();
+ return true;
+ }
+
+ JSLinearString* unicodeExtension =
+ unicodeExtensionValue.toString()->ensureLinear(cx);
+ if (!unicodeExtension) {
+ return false;
+ }
+
+ // Find the type of the requested key in the Unicode extension subtag.
+ auto result = FindUnicodeExtensionType(unicodeExtension, key);
+
+ // Return undefined if the requested key isn't present in the extension.
+ if (!result) {
+ value.setUndefined();
+ return true;
+ }
+
+ size_t index = result->index;
+ size_t length = result->length;
+
+ // Otherwise return the type value of the found keyword.
+ JSString* str = NewDependentString(cx, unicodeExtension, index, length);
+ if (!str) {
+ return false;
+ }
+ value.setString(str);
+ return true;
+}
+
+struct BaseNamePartsResult {
+ IndexAndLength language;
+ mozilla::Maybe<IndexAndLength> script;
+ mozilla::Maybe<IndexAndLength> region;
+};
+
+// Returns [language-length, script-index, region-index, region-length].
+template <typename CharT>
+static BaseNamePartsResult BaseNameParts(const CharT* baseName, size_t length) {
+ size_t languageLength;
+ size_t scriptIndex = 0;
+ size_t regionIndex = 0;
+ size_t regionLength = 0;
+
+ // Search the first separator to find the end of the language subtag.
+ if (const CharT* sep = std::char_traits<CharT>::find(baseName, length, '-')) {
+ languageLength = sep - baseName;
+
+ // Add +1 to skip over the separator character.
+ size_t nextSubtag = languageLength + 1;
+
+ // Script subtags are always four characters long, but take care for a four
+ // character long variant subtag. These start with a digit.
+ if ((nextSubtag + ScriptLength == length ||
+ (nextSubtag + ScriptLength < length &&
+ baseName[nextSubtag + ScriptLength] == '-')) &&
+ mozilla::IsAsciiAlpha(baseName[nextSubtag])) {
+ scriptIndex = nextSubtag;
+ nextSubtag = scriptIndex + ScriptLength + 1;
+ }
+
+ // Region subtags can be either two or three characters long.
+ if (nextSubtag < length) {
+ for (size_t rlen : {AlphaRegionLength, DigitRegionLength}) {
+ MOZ_ASSERT(nextSubtag + rlen <= length);
+ if (nextSubtag + rlen == length || baseName[nextSubtag + rlen] == '-') {
+ regionIndex = nextSubtag;
+ regionLength = rlen;
+ break;
+ }
+ }
+ }
+ } else {
+ // No separator found, the base-name consists of just a language subtag.
+ languageLength = length;
+ }
+
+ IndexAndLength language{0, languageLength};
+ MOZ_ASSERT(intl::IsStructurallyValidLanguageTag(language.spanOf(baseName)));
+
+ mozilla::Maybe<IndexAndLength> script{};
+ if (scriptIndex) {
+ script.emplace(scriptIndex, ScriptLength);
+ MOZ_ASSERT(intl::IsStructurallyValidScriptTag(script->spanOf(baseName)));
+ }
+
+ mozilla::Maybe<IndexAndLength> region{};
+ if (regionIndex) {
+ region.emplace(regionIndex, regionLength);
+ MOZ_ASSERT(intl::IsStructurallyValidRegionTag(region->spanOf(baseName)));
+ }
+
+ return {language, script, region};
+}
+
+static inline auto BaseNameParts(JSLinearString* baseName) {
+ JS::AutoCheckCannotGC nogc;
+ return baseName->hasLatin1Chars()
+ ? BaseNameParts(baseName->latin1Chars(nogc), baseName->length())
+ : BaseNameParts(baseName->twoByteChars(nogc), baseName->length());
+}
+
+// Intl.Locale.prototype.maximize ()
+static bool Locale_maximize(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ RootedLinearString tagStr(cx, locale->languageTag()->ensureLinear(cx));
+ if (!tagStr) {
+ return false;
+ }
+
+ LanguageTag tag(cx);
+ if (!LanguageTagParser::parse(cx, tagStr, tag)) {
+ return false;
+ }
+
+ if (!tag.addLikelySubtags(cx)) {
+ return false;
+ }
+
+ // Step 4.
+ auto* result = CreateLocaleObject(cx, nullptr, tag);
+ if (!result) {
+ return false;
+ }
+ args.rval().setObject(*result);
+ return true;
+}
+
+// Intl.Locale.prototype.maximize ()
+static bool Locale_maximize(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_maximize>(cx, args);
+}
+
+// Intl.Locale.prototype.minimize ()
+static bool Locale_minimize(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ RootedLinearString tagStr(cx, locale->languageTag()->ensureLinear(cx));
+ if (!tagStr) {
+ return false;
+ }
+
+ LanguageTag tag(cx);
+ if (!LanguageTagParser::parse(cx, tagStr, tag)) {
+ return false;
+ }
+
+ if (!tag.removeLikelySubtags(cx)) {
+ return false;
+ }
+
+ // Step 4.
+ auto* result = CreateLocaleObject(cx, nullptr, tag);
+ if (!result) {
+ return false;
+ }
+ args.rval().setObject(*result);
+ return true;
+}
+
+// Intl.Locale.prototype.minimize ()
+static bool Locale_minimize(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_minimize>(cx, args);
+}
+
+// Intl.Locale.prototype.toString ()
+static bool Locale_toString(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ args.rval().setString(locale->languageTag());
+ return true;
+}
+
+// Intl.Locale.prototype.toString ()
+static bool Locale_toString(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_toString>(cx, args);
+}
+
+// get Intl.Locale.prototype.baseName
+static bool Locale_baseName(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Steps 3-4.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ args.rval().setString(locale->baseName());
+ return true;
+}
+
+// get Intl.Locale.prototype.baseName
+static bool Locale_baseName(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_baseName>(cx, args);
+}
+
+// get Intl.Locale.prototype.calendar
+static bool Locale_calendar(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ return GetUnicodeExtension(cx, locale, "ca", args.rval());
+}
+
+// get Intl.Locale.prototype.calendar
+static bool Locale_calendar(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_calendar>(cx, args);
+}
+
+// get Intl.Locale.prototype.caseFirst
+static bool Locale_caseFirst(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ return GetUnicodeExtension(cx, locale, "kf", args.rval());
+}
+
+// get Intl.Locale.prototype.caseFirst
+static bool Locale_caseFirst(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_caseFirst>(cx, args);
+}
+
+// get Intl.Locale.prototype.collation
+static bool Locale_collation(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ return GetUnicodeExtension(cx, locale, "co", args.rval());
+}
+
+// get Intl.Locale.prototype.collation
+static bool Locale_collation(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_collation>(cx, args);
+}
+
+// get Intl.Locale.prototype.hourCycle
+static bool Locale_hourCycle(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ return GetUnicodeExtension(cx, locale, "hc", args.rval());
+}
+
+// get Intl.Locale.prototype.hourCycle
+static bool Locale_hourCycle(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_hourCycle>(cx, args);
+}
+
+// get Intl.Locale.prototype.numeric
+static bool Locale_numeric(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ RootedValue value(cx);
+ if (!GetUnicodeExtension(cx, locale, "kn", &value)) {
+ return false;
+ }
+
+ // Compare against the empty string per Intl.Locale, step 36.a. The Unicode
+ // extension is already canonicalized, so we don't need to compare against
+ // "true" at this point.
+ MOZ_ASSERT(value.isUndefined() || value.isString());
+ MOZ_ASSERT_IF(value.isString(),
+ !StringEqualsLiteral(&value.toString()->asLinear(), "true"));
+
+ args.rval().setBoolean(value.isString() && value.toString()->empty());
+ return true;
+}
+
+// get Intl.Locale.prototype.numeric
+static bool Locale_numeric(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_numeric>(cx, args);
+}
+
+// get Intl.Locale.prototype.numberingSystem
+static bool Intl_Locale_numberingSystem(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ return GetUnicodeExtension(cx, locale, "nu", args.rval());
+}
+
+// get Intl.Locale.prototype.numberingSystem
+static bool Locale_numberingSystem(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Intl_Locale_numberingSystem>(cx, args);
+}
+
+// get Intl.Locale.prototype.language
+static bool Locale_language(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ JSLinearString* baseName = locale->baseName()->ensureLinear(cx);
+ if (!baseName) {
+ return false;
+ }
+
+ // Step 4 (Unnecessary assertion).
+
+ auto language = BaseNameParts(baseName).language;
+
+ size_t index = language.index;
+ size_t length = language.length;
+
+ // Step 5.
+ JSString* str = NewDependentString(cx, baseName, index, length);
+ if (!str) {
+ return false;
+ }
+
+ args.rval().setString(str);
+ return true;
+}
+
+// get Intl.Locale.prototype.language
+static bool Locale_language(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_language>(cx, args);
+}
+
+// get Intl.Locale.prototype.script
+static bool Locale_script(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ JSLinearString* baseName = locale->baseName()->ensureLinear(cx);
+ if (!baseName) {
+ return false;
+ }
+
+ // Step 4 (Unnecessary assertion).
+
+ auto script = BaseNameParts(baseName).script;
+
+ // Step 5.
+ if (!script) {
+ args.rval().setUndefined();
+ return true;
+ }
+
+ size_t index = script->index;
+ size_t length = script->length;
+
+ // Step 6.
+ JSString* str = NewDependentString(cx, baseName, index, length);
+ if (!str) {
+ return false;
+ }
+
+ args.rval().setString(str);
+ return true;
+}
+
+// get Intl.Locale.prototype.script
+static bool Locale_script(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_script>(cx, args);
+}
+
+// get Intl.Locale.prototype.region
+static bool Locale_region(JSContext* cx, const CallArgs& args) {
+ MOZ_ASSERT(IsLocale(args.thisv()));
+
+ // Step 3.
+ auto* locale = &args.thisv().toObject().as<LocaleObject>();
+ JSLinearString* baseName = locale->baseName()->ensureLinear(cx);
+ if (!baseName) {
+ return false;
+ }
+
+ // Step 4 (Unnecessary assertion).
+
+ auto region = BaseNameParts(baseName).region;
+
+ // Step 5.
+ if (!region) {
+ args.rval().setUndefined();
+ return true;
+ }
+
+ size_t index = region->index;
+ size_t length = region->length;
+
+ // Step 6.
+ JSString* str = NewDependentString(cx, baseName, index, length);
+ if (!str) {
+ return false;
+ }
+
+ args.rval().setString(str);
+ return true;
+}
+
+// get Intl.Locale.prototype.region
+static bool Locale_region(JSContext* cx, unsigned argc, Value* vp) {
+ // Steps 1-2.
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return CallNonGenericMethod<IsLocale, Locale_region>(cx, args);
+}
+
+static bool Locale_toSource(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+ args.rval().setString(cx->names().Locale);
+ return true;
+}
+
+static const JSFunctionSpec locale_methods[] = {
+ JS_FN("maximize", Locale_maximize, 0, 0),
+ JS_FN("minimize", Locale_minimize, 0, 0),
+ JS_FN(js_toString_str, Locale_toString, 0, 0),
+ JS_FN(js_toSource_str, Locale_toSource, 0, 0), JS_FS_END};
+
+static const JSPropertySpec locale_properties[] = {
+ JS_PSG("baseName", Locale_baseName, 0),
+ JS_PSG("calendar", Locale_calendar, 0),
+ JS_PSG("caseFirst", Locale_caseFirst, 0),
+ JS_PSG("collation", Locale_collation, 0),
+ JS_PSG("hourCycle", Locale_hourCycle, 0),
+ JS_PSG("numeric", Locale_numeric, 0),
+ JS_PSG("numberingSystem", Locale_numberingSystem, 0),
+ JS_PSG("language", Locale_language, 0),
+ JS_PSG("script", Locale_script, 0),
+ JS_PSG("region", Locale_region, 0),
+ JS_STRING_SYM_PS(toStringTag, "Intl.Locale", JSPROP_READONLY),
+ JS_PS_END};
+
+const ClassSpec LocaleObject::classSpec_ = {
+ GenericCreateConstructor<Locale, 1, gc::AllocKind::FUNCTION>,
+ GenericCreatePrototype<LocaleObject>,
+ nullptr,
+ nullptr,
+ locale_methods,
+ locale_properties,
+ nullptr,
+ ClassSpec::DontDefineConstructor};
+
+bool js::intl_ValidateAndCanonicalizeLanguageTag(JSContext* cx, unsigned argc,
+ Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+ MOZ_ASSERT(args.length() == 2);
+
+ HandleValue tagValue = args[0];
+ bool applyToString = args[1].toBoolean();
+
+ if (tagValue.isObject()) {
+ JSString* tagStr;
+ JS_TRY_VAR_OR_RETURN_FALSE(
+ cx, tagStr,
+ LanguageTagFromMaybeWrappedLocale(cx, &tagValue.toObject()));
+ if (tagStr) {
+ args.rval().setString(tagStr);
+ return true;
+ }
+ }
+
+ if (!applyToString && !tagValue.isString()) {
+ args.rval().setNull();
+ return true;
+ }
+
+ JSString* tagStr = ToString(cx, tagValue);
+ if (!tagStr) {
+ return false;
+ }
+
+ RootedLinearString tagLinearStr(cx, tagStr->ensureLinear(cx));
+ if (!tagLinearStr) {
+ return false;
+ }
+
+ // Handle the common case (a standalone language) first.
+ // Only the following Unicode BCP 47 locale identifier subset is accepted:
+ // unicode_locale_id = unicode_language_id
+ // unicode_language_id = unicode_language_subtag
+ // unicode_language_subtag = alpha{2,3}
+ JSString* language;
+ JS_TRY_VAR_OR_RETURN_FALSE(
+ cx, language, intl::ParseStandaloneISO639LanguageTag(cx, tagLinearStr));
+ if (language) {
+ args.rval().setString(language);
+ return true;
+ }
+
+ LanguageTag tag(cx);
+ if (!LanguageTagParser::parse(cx, tagLinearStr, tag)) {
+ return false;
+ }
+
+ if (!tag.canonicalize(cx)) {
+ return false;
+ }
+
+ JSString* resultStr = tag.toString(cx);
+ if (!resultStr) {
+ return false;
+ }
+ args.rval().setString(resultStr);
+ return true;
+}
+
+bool js::intl_TryValidateAndCanonicalizeLanguageTag(JSContext* cx,
+ unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+ MOZ_ASSERT(args.length() == 1);
+
+ RootedLinearString linear(cx, args[0].toString()->ensureLinear(cx));
+ if (!linear) {
+ return false;
+ }
+
+ LanguageTag tag(cx);
+ bool ok;
+ JS_TRY_VAR_OR_RETURN_FALSE(cx, ok,
+ LanguageTagParser::tryParse(cx, linear, tag));
+
+ // The caller handles invalid inputs.
+ if (!ok) {
+ args.rval().setNull();
+ return true;
+ }
+
+ if (!tag.canonicalize(cx)) {
+ return false;
+ }
+
+ JSString* resultStr = tag.toString(cx);
+ if (!resultStr) {
+ return false;
+ }
+ args.rval().setString(resultStr);
+ return true;
+}
+
+bool js::intl_ValidateAndCanonicalizeUnicodeExtensionType(JSContext* cx,
+ unsigned argc,
+ Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+ MOZ_ASSERT(args.length() == 3);
+
+ HandleValue typeArg = args[0];
+ MOZ_ASSERT(typeArg.isString(), "type must be a string");
+
+ HandleValue optionArg = args[1];
+ MOZ_ASSERT(optionArg.isString(), "option name must be a string");
+
+ HandleValue keyArg = args[2];
+ MOZ_ASSERT(keyArg.isString(), "key must be a string");
+
+ RootedLinearString unicodeType(cx, typeArg.toString()->ensureLinear(cx));
+ if (!unicodeType) {
+ return false;
+ }
+
+ if (!IsValidUnicodeExtensionValue(unicodeType)) {
+ UniqueChars optionChars = EncodeAscii(cx, optionArg.toString());
+ if (!optionChars) {
+ return false;
+ }
+
+ UniqueChars unicodeTypeChars = QuoteString(cx, unicodeType, '"');
+ if (!unicodeTypeChars) {
+ return false;
+ }
+
+ JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr,
+ JSMSG_INVALID_OPTION_VALUE, optionChars.get(),
+ unicodeTypeChars.get());
+ return false;
+ }
+
+ char unicodeKey[UnicodeKeyLength];
+ {
+ JSLinearString* str = keyArg.toString()->ensureLinear(cx);
+ if (!str) {
+ return false;
+ }
+ MOZ_ASSERT(str->length() == UnicodeKeyLength);
+
+ for (size_t i = 0; i < UnicodeKeyLength; i++) {
+ char16_t ch = str->latin1OrTwoByteChar(i);
+ MOZ_ASSERT(mozilla::IsAscii(ch));
+ unicodeKey[i] = char(ch);
+ }
+ }
+
+ UniqueChars unicodeTypeChars = EncodeAscii(cx, unicodeType);
+ if (!unicodeTypeChars) {
+ return false;
+ }
+
+ size_t unicodeTypeLength = unicodeType->length();
+ MOZ_ASSERT(strlen(unicodeTypeChars.get()) == unicodeTypeLength);
+
+ // Convert into canonical case before searching for replacements.
+ intl::AsciiToLowerCase(unicodeTypeChars.get(), unicodeTypeLength,
+ unicodeTypeChars.get());
+
+ auto key = mozilla::Span(unicodeKey, UnicodeKeyLength);
+ auto type = mozilla::Span(unicodeTypeChars.get(), unicodeTypeLength);
+
+ // Search if there's a replacement for the current Unicode keyword.
+ JSString* result;
+ if (const char* replacement =
+ LanguageTag::replaceUnicodeExtensionType(key, type)) {
+ result = NewStringCopyZ<CanGC>(cx, replacement);
+ } else {
+ result = StringToLowerCase(cx, unicodeType);
+ }
+ if (!result) {
+ return false;
+ }
+
+ args.rval().setString(result);
+ return true;
+}