| // 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. |
| |
| #ifndef V8_INTL_SUPPORT |
| #error Internationalization is expected to be enabled. |
| #endif // V8_INTL_SUPPORT |
| |
| #include "src/objects/intl-objects.h" |
| |
| #include <algorithm> |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "src/api-inl.h" |
| #include "src/global-handles.h" |
| #include "src/heap/factory.h" |
| #include "src/isolate.h" |
| #include "src/objects-inl.h" |
| #include "src/objects/js-collator-inl.h" |
| #include "src/objects/js-date-time-format-inl.h" |
| #include "src/objects/js-number-format-inl.h" |
| #include "src/objects/string.h" |
| #include "src/property-descriptor.h" |
| #include "src/string-case.h" |
| #include "unicode/basictz.h" |
| #include "unicode/brkiter.h" |
| #include "unicode/coll.h" |
| #include "unicode/decimfmt.h" |
| #include "unicode/locid.h" |
| #include "unicode/normalizer2.h" |
| #include "unicode/numfmt.h" |
| #include "unicode/numsys.h" |
| #include "unicode/timezone.h" |
| #include "unicode/ustring.h" |
| #include "unicode/uvernum.h" // U_ICU_VERSION_MAJOR_NUM |
| |
| #define XSTR(s) STR(s) |
| #define STR(s) #s |
| static_assert( |
| V8_MINIMUM_ICU_VERSION <= U_ICU_VERSION_MAJOR_NUM, |
| "v8 is required to build with ICU " XSTR(V8_MINIMUM_ICU_VERSION) " and up"); |
| #undef STR |
| #undef XSTR |
| |
| namespace v8 { |
| namespace internal { |
| |
| namespace { |
| inline bool IsASCIIUpper(uint16_t ch) { return ch >= 'A' && ch <= 'Z'; } |
| |
| const uint8_t kToLower[256] = { |
| 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, |
| 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, |
| 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, |
| 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, |
| 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, |
| 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, |
| 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, |
| 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, |
| 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, |
| 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, |
| 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, |
| 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, |
| 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, |
| 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, |
| 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, |
| 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, |
| 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, |
| 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xD7, |
| 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, |
| 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, |
| 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, |
| 0xFC, 0xFD, 0xFE, 0xFF, |
| }; |
| |
| inline uint16_t ToLatin1Lower(uint16_t ch) { |
| return static_cast<uint16_t>(kToLower[ch]); |
| } |
| |
| inline uint16_t ToASCIIUpper(uint16_t ch) { |
| return ch & ~((ch >= 'a' && ch <= 'z') << 5); |
| } |
| |
| // Does not work for U+00DF (sharp-s), U+00B5 (micron), U+00FF. |
| inline uint16_t ToLatin1Upper(uint16_t ch) { |
| DCHECK(ch != 0xDF && ch != 0xB5 && ch != 0xFF); |
| return ch & |
| ~(((ch >= 'a' && ch <= 'z') || (((ch & 0xE0) == 0xE0) && ch != 0xF7)) |
| << 5); |
| } |
| |
| template <typename Char> |
| bool ToUpperFastASCII(const Vector<const Char>& src, |
| Handle<SeqOneByteString> result) { |
| // Do a faster loop for the case where all the characters are ASCII. |
| uint16_t ored = 0; |
| int32_t index = 0; |
| for (auto it = src.begin(); it != src.end(); ++it) { |
| uint16_t ch = static_cast<uint16_t>(*it); |
| ored |= ch; |
| result->SeqOneByteStringSet(index++, ToASCIIUpper(ch)); |
| } |
| return !(ored & ~0x7F); |
| } |
| |
| const uint16_t sharp_s = 0xDF; |
| |
| template <typename Char> |
| bool ToUpperOneByte(const Vector<const Char>& src, uint8_t* dest, |
| int* sharp_s_count) { |
| // Still pretty-fast path for the input with non-ASCII Latin-1 characters. |
| |
| // There are two special cases. |
| // 1. U+00B5 and U+00FF are mapped to a character beyond U+00FF. |
| // 2. Lower case sharp-S converts to "SS" (two characters) |
| *sharp_s_count = 0; |
| for (auto it = src.begin(); it != src.end(); ++it) { |
| uint16_t ch = static_cast<uint16_t>(*it); |
| if (V8_UNLIKELY(ch == sharp_s)) { |
| ++(*sharp_s_count); |
| continue; |
| } |
| if (V8_UNLIKELY(ch == 0xB5 || ch == 0xFF)) { |
| // Since this upper-cased character does not fit in an 8-bit string, we |
| // need to take the 16-bit path. |
| return false; |
| } |
| *dest++ = ToLatin1Upper(ch); |
| } |
| |
| return true; |
| } |
| |
| template <typename Char> |
| void ToUpperWithSharpS(const Vector<const Char>& src, |
| Handle<SeqOneByteString> result) { |
| int32_t dest_index = 0; |
| for (auto it = src.begin(); it != src.end(); ++it) { |
| uint16_t ch = static_cast<uint16_t>(*it); |
| if (ch == sharp_s) { |
| result->SeqOneByteStringSet(dest_index++, 'S'); |
| result->SeqOneByteStringSet(dest_index++, 'S'); |
| } else { |
| result->SeqOneByteStringSet(dest_index++, ToLatin1Upper(ch)); |
| } |
| } |
| } |
| |
| inline int FindFirstUpperOrNonAscii(String s, int length) { |
| for (int index = 0; index < length; ++index) { |
| uint16_t ch = s->Get(index); |
| if (V8_UNLIKELY(IsASCIIUpper(ch) || ch & ~0x7F)) { |
| return index; |
| } |
| } |
| return length; |
| } |
| |
| const UChar* GetUCharBufferFromFlat(const String::FlatContent& flat, |
| std::unique_ptr<uc16[]>* dest, |
| int32_t length) { |
| DCHECK(flat.IsFlat()); |
| if (flat.IsOneByte()) { |
| if (!*dest) { |
| dest->reset(NewArray<uc16>(length)); |
| CopyChars(dest->get(), flat.ToOneByteVector().start(), length); |
| } |
| return reinterpret_cast<const UChar*>(dest->get()); |
| } else { |
| return reinterpret_cast<const UChar*>(flat.ToUC16Vector().start()); |
| } |
| } |
| |
| template <typename T> |
| MaybeHandle<T> New(Isolate* isolate, Handle<JSFunction> constructor, |
| Handle<Object> locales, Handle<Object> options) { |
| Handle<JSObject> result; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, result, |
| JSObject::New(constructor, constructor, Handle<AllocationSite>::null()), |
| T); |
| return T::Initialize(isolate, Handle<T>::cast(result), locales, options); |
| } |
| } // namespace |
| |
| const uint8_t* Intl::ToLatin1LowerTable() { return &kToLower[0]; } |
| |
| icu::UnicodeString Intl::ToICUUnicodeString(Isolate* isolate, |
| Handle<String> string) { |
| string = String::Flatten(isolate, string); |
| { |
| DisallowHeapAllocation no_gc; |
| std::unique_ptr<uc16[]> sap; |
| return icu::UnicodeString( |
| GetUCharBufferFromFlat(string->GetFlatContent(no_gc), &sap, |
| string->length()), |
| string->length()); |
| } |
| } |
| |
| namespace { |
| MaybeHandle<String> LocaleConvertCase(Isolate* isolate, Handle<String> s, |
| bool is_to_upper, const char* lang) { |
| auto case_converter = is_to_upper ? u_strToUpper : u_strToLower; |
| int32_t src_length = s->length(); |
| int32_t dest_length = src_length; |
| UErrorCode status; |
| Handle<SeqTwoByteString> result; |
| std::unique_ptr<uc16[]> sap; |
| |
| if (dest_length == 0) return ReadOnlyRoots(isolate).empty_string_handle(); |
| |
| // This is not a real loop. It'll be executed only once (no overflow) or |
| // twice (overflow). |
| for (int i = 0; i < 2; ++i) { |
| // Case conversion can increase the string length (e.g. sharp-S => SS) so |
| // that we have to handle RangeError exceptions here. |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, result, isolate->factory()->NewRawTwoByteString(dest_length), |
| String); |
| DisallowHeapAllocation no_gc; |
| DCHECK(s->IsFlat()); |
| String::FlatContent flat = s->GetFlatContent(no_gc); |
| const UChar* src = GetUCharBufferFromFlat(flat, &sap, src_length); |
| status = U_ZERO_ERROR; |
| dest_length = |
| case_converter(reinterpret_cast<UChar*>(result->GetChars(no_gc)), |
| dest_length, src, src_length, lang, &status); |
| if (status != U_BUFFER_OVERFLOW_ERROR) break; |
| } |
| |
| // In most cases, the output will fill the destination buffer completely |
| // leading to an unterminated string (U_STRING_NOT_TERMINATED_WARNING). |
| // Only in rare cases, it'll be shorter than the destination buffer and |
| // |result| has to be truncated. |
| DCHECK(U_SUCCESS(status)); |
| if (V8_LIKELY(status == U_STRING_NOT_TERMINATED_WARNING)) { |
| DCHECK(dest_length == result->length()); |
| return result; |
| } |
| DCHECK(dest_length < result->length()); |
| return SeqString::Truncate(result, dest_length); |
| } |
| |
| } // namespace |
| |
| // A stripped-down version of ConvertToLower that can only handle flat one-byte |
| // strings and does not allocate. Note that {src} could still be, e.g., a |
| // one-byte sliced string with a two-byte parent string. |
| // Called from TF builtins. |
| String Intl::ConvertOneByteToLower(String src, String dst) { |
| DCHECK_EQ(src->length(), dst->length()); |
| DCHECK(src->HasOnlyOneByteChars()); |
| DCHECK(src->IsFlat()); |
| DCHECK(dst->IsSeqOneByteString()); |
| |
| DisallowHeapAllocation no_gc; |
| |
| const int length = src->length(); |
| String::FlatContent src_flat = src->GetFlatContent(no_gc); |
| uint8_t* dst_data = SeqOneByteString::cast(dst)->GetChars(no_gc); |
| |
| if (src_flat.IsOneByte()) { |
| const uint8_t* src_data = src_flat.ToOneByteVector().start(); |
| |
| bool has_changed_character = false; |
| int index_to_first_unprocessed = |
| FastAsciiConvert<true>(reinterpret_cast<char*>(dst_data), |
| reinterpret_cast<const char*>(src_data), length, |
| &has_changed_character); |
| |
| if (index_to_first_unprocessed == length) { |
| return has_changed_character ? dst : src; |
| } |
| |
| // If not ASCII, we keep the result up to index_to_first_unprocessed and |
| // process the rest. |
| for (int index = index_to_first_unprocessed; index < length; ++index) { |
| dst_data[index] = ToLatin1Lower(static_cast<uint16_t>(src_data[index])); |
| } |
| } else { |
| DCHECK(src_flat.IsTwoByte()); |
| int index_to_first_unprocessed = FindFirstUpperOrNonAscii(src, length); |
| if (index_to_first_unprocessed == length) return src; |
| |
| const uint16_t* src_data = src_flat.ToUC16Vector().start(); |
| CopyChars(dst_data, src_data, index_to_first_unprocessed); |
| for (int index = index_to_first_unprocessed; index < length; ++index) { |
| dst_data[index] = ToLatin1Lower(static_cast<uint16_t>(src_data[index])); |
| } |
| } |
| |
| return dst; |
| } |
| |
| MaybeHandle<String> Intl::ConvertToLower(Isolate* isolate, Handle<String> s) { |
| if (!s->HasOnlyOneByteChars()) { |
| // Use a slower implementation for strings with characters beyond U+00FF. |
| return LocaleConvertCase(isolate, s, false, ""); |
| } |
| |
| int length = s->length(); |
| |
| // We depend here on the invariant that the length of a Latin1 |
| // string is invariant under ToLowerCase, and the result always |
| // fits in the Latin1 range in the *root locale*. It does not hold |
| // for ToUpperCase even in the root locale. |
| |
| // Scan the string for uppercase and non-ASCII characters for strings |
| // shorter than a machine-word without any memory allocation overhead. |
| // TODO(jshin): Apply this to a longer input by breaking FastAsciiConvert() |
| // to two parts, one for scanning the prefix with no change and the other for |
| // handling ASCII-only characters. |
| |
| bool is_short = length < static_cast<int>(sizeof(uintptr_t)); |
| if (is_short) { |
| bool is_lower_ascii = FindFirstUpperOrNonAscii(*s, length) == length; |
| if (is_lower_ascii) return s; |
| } |
| |
| Handle<SeqOneByteString> result = |
| isolate->factory()->NewRawOneByteString(length).ToHandleChecked(); |
| |
| return Handle<String>(Intl::ConvertOneByteToLower(*s, *result), isolate); |
| } |
| |
| MaybeHandle<String> Intl::ConvertToUpper(Isolate* isolate, Handle<String> s) { |
| int32_t length = s->length(); |
| if (s->HasOnlyOneByteChars() && length > 0) { |
| Handle<SeqOneByteString> result = |
| isolate->factory()->NewRawOneByteString(length).ToHandleChecked(); |
| |
| DCHECK(s->IsFlat()); |
| int sharp_s_count; |
| bool is_result_single_byte; |
| { |
| DisallowHeapAllocation no_gc; |
| String::FlatContent flat = s->GetFlatContent(no_gc); |
| uint8_t* dest = result->GetChars(no_gc); |
| if (flat.IsOneByte()) { |
| Vector<const uint8_t> src = flat.ToOneByteVector(); |
| bool has_changed_character = false; |
| int index_to_first_unprocessed = FastAsciiConvert<false>( |
| reinterpret_cast<char*>(result->GetChars(no_gc)), |
| reinterpret_cast<const char*>(src.start()), length, |
| &has_changed_character); |
| if (index_to_first_unprocessed == length) { |
| return has_changed_character ? result : s; |
| } |
| // If not ASCII, we keep the result up to index_to_first_unprocessed and |
| // process the rest. |
| is_result_single_byte = |
| ToUpperOneByte(src.SubVector(index_to_first_unprocessed, length), |
| dest + index_to_first_unprocessed, &sharp_s_count); |
| } else { |
| DCHECK(flat.IsTwoByte()); |
| Vector<const uint16_t> src = flat.ToUC16Vector(); |
| if (ToUpperFastASCII(src, result)) return result; |
| is_result_single_byte = ToUpperOneByte(src, dest, &sharp_s_count); |
| } |
| } |
| |
| // Go to the full Unicode path if there are characters whose uppercase |
| // is beyond the Latin-1 range (cannot be represented in OneByteString). |
| if (V8_UNLIKELY(!is_result_single_byte)) { |
| return LocaleConvertCase(isolate, s, true, ""); |
| } |
| |
| if (sharp_s_count == 0) return result; |
| |
| // We have sharp_s_count sharp-s characters, but the result is still |
| // in the Latin-1 range. |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, result, |
| isolate->factory()->NewRawOneByteString(length + sharp_s_count), |
| String); |
| DisallowHeapAllocation no_gc; |
| String::FlatContent flat = s->GetFlatContent(no_gc); |
| if (flat.IsOneByte()) { |
| ToUpperWithSharpS(flat.ToOneByteVector(), result); |
| } else { |
| ToUpperWithSharpS(flat.ToUC16Vector(), result); |
| } |
| |
| return result; |
| } |
| |
| return LocaleConvertCase(isolate, s, true, ""); |
| } |
| |
| std::string Intl::GetNumberingSystem(const icu::Locale& icu_locale) { |
| // 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; |
| std::unique_ptr<icu::NumberingSystem> numbering_system( |
| icu::NumberingSystem::createInstance(icu_locale, status)); |
| if (U_SUCCESS(status)) return numbering_system->getName(); |
| return "latn"; |
| } |
| |
| icu::Locale Intl::CreateICULocale(const std::string& bcp47_locale) { |
| DisallowHeapAllocation no_gc; |
| |
| // Convert BCP47 into ICU locale format. |
| UErrorCode status = U_ZERO_ERROR; |
| char icu_result[ULOC_FULLNAME_CAPACITY]; |
| int parsed_length = 0; |
| |
| // bcp47_locale_str should be a canonicalized language tag, which |
| // means this shouldn't fail. |
| uloc_forLanguageTag(bcp47_locale.c_str(), icu_result, ULOC_FULLNAME_CAPACITY, |
| &parsed_length, &status); |
| CHECK(U_SUCCESS(status)); |
| |
| // bcp47_locale is already checked for its structural validity |
| // so that it should be parsed completely. |
| size_t bcp47_length = bcp47_locale.length(); |
| CHECK_EQ(bcp47_length, parsed_length); |
| |
| icu::Locale icu_locale(icu_result); |
| if (icu_locale.isBogus()) { |
| FATAL("Failed to create ICU locale, are ICU data files missing?"); |
| } |
| |
| return icu_locale; |
| } |
| |
| // static |
| |
| MaybeHandle<String> Intl::ToString(Isolate* isolate, |
| const icu::UnicodeString& string) { |
| return isolate->factory()->NewStringFromTwoByte(Vector<const uint16_t>( |
| reinterpret_cast<const uint16_t*>(string.getBuffer()), string.length())); |
| } |
| |
| MaybeHandle<String> Intl::ToString(Isolate* isolate, |
| const icu::UnicodeString& string, |
| int32_t begin, int32_t end) { |
| return Intl::ToString(isolate, string.tempSubStringBetween(begin, end)); |
| } |
| |
| namespace { |
| |
| Handle<JSObject> InnerAddElement(Isolate* isolate, Handle<JSArray> array, |
| int index, Handle<String> field_type_string, |
| Handle<String> value) { |
| // let element = $array[$index] = { |
| // type: $field_type_string, |
| // value: $value |
| // } |
| // return element; |
| Factory* factory = isolate->factory(); |
| Handle<JSObject> element = factory->NewJSObject(isolate->object_function()); |
| JSObject::AddProperty(isolate, element, factory->type_string(), |
| field_type_string, NONE); |
| |
| JSObject::AddProperty(isolate, element, factory->value_string(), value, NONE); |
| JSObject::AddDataElement(array, index, element, NONE); |
| return element; |
| } |
| |
| } // namespace |
| |
| void Intl::AddElement(Isolate* isolate, Handle<JSArray> array, int index, |
| Handle<String> field_type_string, Handle<String> value) { |
| // Same as $array[$index] = {type: $field_type_string, value: $value}; |
| InnerAddElement(isolate, array, index, field_type_string, value); |
| } |
| |
| void Intl::AddElement(Isolate* isolate, Handle<JSArray> array, int index, |
| Handle<String> field_type_string, Handle<String> value, |
| Handle<String> additional_property_name, |
| Handle<String> additional_property_value) { |
| // Same as $array[$index] = { |
| // type: $field_type_string, value: $value, |
| // $additional_property_name: $additional_property_value |
| // } |
| Handle<JSObject> element = |
| InnerAddElement(isolate, array, index, field_type_string, value); |
| JSObject::AddProperty(isolate, element, additional_property_name, |
| additional_property_value, NONE); |
| } |
| |
| namespace { |
| |
| // Build the shortened locale; eg, convert xx_Yyyy_ZZ to xx_ZZ. |
| // |
| // If locale has a script tag then return true and the locale without the |
| // script else return false and an empty string. |
| bool RemoveLocaleScriptTag(const std::string& icu_locale, |
| std::string* locale_less_script) { |
| icu::Locale new_locale = icu::Locale::createCanonical(icu_locale.c_str()); |
| const char* icu_script = new_locale.getScript(); |
| if (icu_script == nullptr || strlen(icu_script) == 0) { |
| *locale_less_script = std::string(); |
| return false; |
| } |
| |
| const char* icu_language = new_locale.getLanguage(); |
| const char* icu_country = new_locale.getCountry(); |
| icu::Locale short_locale = icu::Locale(icu_language, icu_country); |
| *locale_less_script = short_locale.getName(); |
| return true; |
| } |
| |
| } // namespace |
| |
| std::set<std::string> Intl::BuildLocaleSet( |
| const icu::Locale* icu_available_locales, int32_t count) { |
| std::set<std::string> locales; |
| UErrorCode error = U_ZERO_ERROR; |
| char result[ULOC_FULLNAME_CAPACITY]; |
| |
| for (int32_t i = 0; i < count; ++i) { |
| const char* icu_name = icu_available_locales[i].getName(); |
| |
| error = U_ZERO_ERROR; |
| // No need to force strict BCP47 rules. |
| uloc_toLanguageTag(icu_name, result, ULOC_FULLNAME_CAPACITY, FALSE, &error); |
| if (U_FAILURE(error) || error == U_STRING_NOT_TERMINATED_WARNING) { |
| // This shouldn't happen, but lets not break the user. |
| continue; |
| } |
| std::string locale(result); |
| locales.insert(locale); |
| |
| std::string shortened_locale; |
| if (RemoveLocaleScriptTag(icu_name, &shortened_locale)) { |
| std::replace(shortened_locale.begin(), shortened_locale.end(), '_', '-'); |
| locales.insert(shortened_locale); |
| } |
| } |
| |
| return locales; |
| } |
| |
| namespace { |
| std::string DefaultLocale(Isolate* isolate) { |
| if (isolate->default_locale().empty()) { |
| icu::Locale default_locale; |
| // Translate ICU's fallback locale to a well-known locale. |
| if (strcmp(default_locale.getName(), "en_US_POSIX") == 0) { |
| isolate->set_default_locale("en-US"); |
| } else { |
| // Set the locale |
| char result[ULOC_FULLNAME_CAPACITY]; |
| UErrorCode status = U_ZERO_ERROR; |
| int32_t length = |
| uloc_toLanguageTag(default_locale.getName(), result, |
| ULOC_FULLNAME_CAPACITY, FALSE, &status); |
| isolate->set_default_locale( |
| U_SUCCESS(status) ? std::string(result, length) : "und"); |
| } |
| DCHECK(!isolate->default_locale().empty()); |
| } |
| return isolate->default_locale(); |
| } |
| } // namespace |
| |
| // See ecma402/#legacy-constructor. |
| MaybeHandle<Object> Intl::LegacyUnwrapReceiver(Isolate* isolate, |
| Handle<JSReceiver> receiver, |
| Handle<JSFunction> constructor, |
| bool has_initialized_slot) { |
| Handle<Object> obj_is_instance_of; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, obj_is_instance_of, |
| Object::InstanceOf(isolate, receiver, constructor), |
| Object); |
| bool is_instance_of = obj_is_instance_of->BooleanValue(isolate); |
| |
| // 2. If receiver does not have an [[Initialized...]] internal slot |
| // and ? InstanceofOperator(receiver, constructor) is true, then |
| if (!has_initialized_slot && is_instance_of) { |
| // 2. a. Let new_receiver be ? Get(receiver, %Intl%.[[FallbackSymbol]]). |
| Handle<Object> new_receiver; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, new_receiver, |
| JSReceiver::GetProperty(isolate, receiver, |
| isolate->factory()->intl_fallback_symbol()), |
| Object); |
| return new_receiver; |
| } |
| |
| return receiver; |
| } |
| |
| Maybe<bool> Intl::GetStringOption(Isolate* isolate, Handle<JSReceiver> options, |
| const char* property, |
| std::vector<const char*> values, |
| const char* service, |
| std::unique_ptr<char[]>* result) { |
| Handle<String> property_str = |
| isolate->factory()->NewStringFromAsciiChecked(property); |
| |
| // 1. Let value be ? Get(options, property). |
| Handle<Object> value; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, value, |
| Object::GetPropertyOrElement(isolate, options, property_str), |
| Nothing<bool>()); |
| |
| if (value->IsUndefined(isolate)) { |
| return Just(false); |
| } |
| |
| // 2. c. Let value be ? ToString(value). |
| Handle<String> value_str; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, value_str, Object::ToString(isolate, value), Nothing<bool>()); |
| std::unique_ptr<char[]> value_cstr = value_str->ToCString(); |
| |
| // 2. d. if values is not undefined, then |
| if (values.size() > 0) { |
| // 2. d. i. If values does not contain an element equal to value, |
| // throw a RangeError exception. |
| for (size_t i = 0; i < values.size(); i++) { |
| if (strcmp(values.at(i), value_cstr.get()) == 0) { |
| // 2. e. return value |
| *result = std::move(value_cstr); |
| return Just(true); |
| } |
| } |
| |
| Handle<String> service_str = |
| isolate->factory()->NewStringFromAsciiChecked(service); |
| THROW_NEW_ERROR_RETURN_VALUE( |
| isolate, |
| NewRangeError(MessageTemplate::kValueOutOfRange, value, service_str, |
| property_str), |
| Nothing<bool>()); |
| } |
| |
| // 2. e. return value |
| *result = std::move(value_cstr); |
| return Just(true); |
| } |
| |
| V8_WARN_UNUSED_RESULT Maybe<bool> Intl::GetBoolOption( |
| Isolate* isolate, Handle<JSReceiver> options, const char* property, |
| const char* service, bool* result) { |
| Handle<String> property_str = |
| isolate->factory()->NewStringFromAsciiChecked(property); |
| |
| // 1. Let value be ? Get(options, property). |
| Handle<Object> value; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, value, |
| Object::GetPropertyOrElement(isolate, options, property_str), |
| Nothing<bool>()); |
| |
| // 2. If value is not undefined, then |
| if (!value->IsUndefined(isolate)) { |
| // 2. b. i. Let value be ToBoolean(value). |
| *result = value->BooleanValue(isolate); |
| |
| // 2. e. return value |
| return Just(true); |
| } |
| |
| return Just(false); |
| } |
| |
| namespace { |
| |
| char AsciiToLower(char c) { |
| if (c < 'A' || c > 'Z') { |
| return c; |
| } |
| return c | (1 << 5); |
| } |
| |
| bool IsLowerAscii(char c) { return c >= 'a' && c < 'z'; } |
| |
| bool IsTwoLetterLanguage(const std::string& locale) { |
| // Two letters, both in range 'a'-'z'... |
| return locale.length() == 2 && IsLowerAscii(locale[0]) && |
| IsLowerAscii(locale[1]); |
| } |
| |
| bool IsDeprecatedLanguage(const std::string& locale) { |
| // Check if locale is one of the deprecated language tags: |
| return locale == "in" || locale == "iw" || locale == "ji" || locale == "jw"; |
| } |
| |
| // Reference: |
| // https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry |
| bool IsGrandfatheredTagWithoutPreferredVaule(const std::string& locale) { |
| if (V8_UNLIKELY(locale == "zh-min" || locale == "cel-gaulish")) return true; |
| if (locale.length() > 6 /* i-mingo is 7 chars long */ && |
| V8_UNLIKELY(locale[0] == 'i' && locale[1] == '-')) { |
| return locale.substr(2) == "default" || locale.substr(2) == "enochian" || |
| locale.substr(2) == "mingo"; |
| } |
| return false; |
| } |
| |
| } // anonymous namespace |
| |
| Maybe<std::string> Intl::CanonicalizeLanguageTag(Isolate* isolate, |
| Handle<Object> locale_in) { |
| Handle<String> locale_str; |
| // This does part of the validity checking spec'ed in CanonicalizeLocaleList: |
| // 7c ii. If Type(kValue) is not String or Object, throw a TypeError |
| // exception. |
| // 7c iii. Let tag be ? ToString(kValue). |
| // 7c iv. If IsStructurallyValidLanguageTag(tag) is false, throw a |
| // RangeError exception. |
| |
| if (locale_in->IsString()) { |
| locale_str = Handle<String>::cast(locale_in); |
| } else if (locale_in->IsJSReceiver()) { |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, locale_str, |
| Object::ToString(isolate, locale_in), |
| Nothing<std::string>()); |
| } else { |
| THROW_NEW_ERROR_RETURN_VALUE(isolate, |
| NewTypeError(MessageTemplate::kLanguageID), |
| Nothing<std::string>()); |
| } |
| std::string locale(locale_str->ToCString().get()); |
| |
| if (locale.length() == 0 || |
| !String::IsAscii(locale.data(), static_cast<int>(locale.length()))) { |
| THROW_NEW_ERROR_RETURN_VALUE( |
| isolate, |
| NewRangeError(MessageTemplate::kInvalidLanguageTag, locale_str), |
| Nothing<std::string>()); |
| } |
| |
| // Optimize for the most common case: a 2-letter language code in the |
| // canonical form/lowercase that is not one of the deprecated codes |
| // (in, iw, ji, jw). Don't check for ~70 of 3-letter deprecated language |
| // codes. Instead, let them be handled by ICU in the slow path. However, |
| // fast-track 'fil' (3-letter canonical code). |
| if ((IsTwoLetterLanguage(locale) && !IsDeprecatedLanguage(locale)) || |
| locale == "fil") { |
| return Just(locale); |
| } |
| |
| // Because per BCP 47 2.1.1 language tags are case-insensitive, lowercase |
| // the input before any more check. |
| std::transform(locale.begin(), locale.end(), locale.begin(), AsciiToLower); |
| |
| // ICU maps a few grandfathered tags to what looks like a regular language |
| // tag even though IANA language tag registry does not have a preferred |
| // entry map for them. Return them as they're with lowercasing. |
| if (IsGrandfatheredTagWithoutPreferredVaule(locale)) { |
| return Just(locale); |
| } |
| |
| // // ECMA 402 6.2.3 |
| // TODO(jshin): uloc_{for,to}TanguageTag can fail even for a structually valid |
| // language tag if it's too long (much longer than 100 chars). Even if we |
| // allocate a longer buffer, ICU will still fail if it's too long. Either |
| // propose to Ecma 402 to put a limit on the locale length or change ICU to |
| // handle long locale names better. See |
| // https://unicode-org.atlassian.net/browse/ICU-13417 |
| UErrorCode error = U_ZERO_ERROR; |
| char icu_result[ULOC_FULLNAME_CAPACITY]; |
| // uloc_forLanguageTag checks the structrual validity. If the input BCP47 |
| // language tag is parsed all the way to the end, it indicates that the input |
| // is structurally valid. Due to a couple of bugs, we can't use it |
| // without Chromium patches or ICU 62 or earlier. |
| int parsed_length; |
| uloc_forLanguageTag(locale.c_str(), icu_result, ULOC_FULLNAME_CAPACITY, |
| &parsed_length, &error); |
| if (U_FAILURE(error) || |
| static_cast<size_t>(parsed_length) < locale.length() || |
| error == U_STRING_NOT_TERMINATED_WARNING) { |
| THROW_NEW_ERROR_RETURN_VALUE( |
| isolate, |
| NewRangeError(MessageTemplate::kInvalidLanguageTag, locale_str), |
| Nothing<std::string>()); |
| } |
| |
| // Force strict BCP47 rules. |
| char result[ULOC_FULLNAME_CAPACITY]; |
| int32_t result_len = uloc_toLanguageTag(icu_result, result, |
| ULOC_FULLNAME_CAPACITY, TRUE, &error); |
| |
| if (U_FAILURE(error)) { |
| THROW_NEW_ERROR_RETURN_VALUE( |
| isolate, |
| NewRangeError(MessageTemplate::kInvalidLanguageTag, locale_str), |
| Nothing<std::string>()); |
| } |
| |
| return Just(std::string(result, result_len)); |
| } |
| |
| Maybe<std::vector<std::string>> Intl::CanonicalizeLocaleList( |
| Isolate* isolate, Handle<Object> locales, bool only_return_one_result) { |
| // 1. If locales is undefined, then |
| if (locales->IsUndefined(isolate)) { |
| // 1a. Return a new empty List. |
| return Just(std::vector<std::string>()); |
| } |
| // 2. Let seen be a new empty List. |
| std::vector<std::string> seen; |
| // 3. If Type(locales) is String, then |
| if (locales->IsString()) { |
| // 3a. Let O be CreateArrayFromList(« locales »). |
| // Instead of creating a one-element array and then iterating over it, |
| // we inline the body of the iteration: |
| std::string canonicalized_tag; |
| if (!CanonicalizeLanguageTag(isolate, locales).To(&canonicalized_tag)) { |
| return Nothing<std::vector<std::string>>(); |
| } |
| seen.push_back(canonicalized_tag); |
| return Just(seen); |
| } |
| // 4. Else, |
| // 4a. Let O be ? ToObject(locales). |
| Handle<JSReceiver> o; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, o, |
| Object::ToObject(isolate, locales), |
| Nothing<std::vector<std::string>>()); |
| // 5. Let len be ? ToLength(? Get(O, "length")). |
| Handle<Object> length_obj; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, length_obj, |
| Object::GetLengthFromArrayLike(isolate, o), |
| Nothing<std::vector<std::string>>()); |
| // TODO(jkummerow): Spec violation: strictly speaking, we have to iterate |
| // up to 2^53-1 if {length_obj} says so. Since cases above 2^32 probably |
| // don't happen in practice (and would be very slow if they do), we'll keep |
| // the code simple for now by using a saturating to-uint32 conversion. |
| double raw_length = length_obj->Number(); |
| uint32_t len = |
| raw_length >= kMaxUInt32 ? kMaxUInt32 : static_cast<uint32_t>(raw_length); |
| // 6. Let k be 0. |
| // 7. Repeat, while k < len |
| for (uint32_t k = 0; k < len; k++) { |
| // 7a. Let Pk be ToString(k). |
| // 7b. Let kPresent be ? HasProperty(O, Pk). |
| LookupIterator it(isolate, o, k); |
| Maybe<bool> maybe_found = JSReceiver::HasProperty(&it); |
| MAYBE_RETURN(maybe_found, Nothing<std::vector<std::string>>()); |
| // 7c. If kPresent is true, then |
| if (!maybe_found.FromJust()) continue; |
| // 7c i. Let kValue be ? Get(O, Pk). |
| Handle<Object> k_value; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, k_value, Object::GetProperty(&it), |
| Nothing<std::vector<std::string>>()); |
| // 7c ii. If Type(kValue) is not String or Object, throw a TypeError |
| // exception. |
| // 7c iii. Let tag be ? ToString(kValue). |
| // 7c iv. If IsStructurallyValidLanguageTag(tag) is false, throw a |
| // RangeError exception. |
| // 7c v. Let canonicalizedTag be CanonicalizeLanguageTag(tag). |
| std::string canonicalized_tag; |
| if (!CanonicalizeLanguageTag(isolate, k_value).To(&canonicalized_tag)) { |
| return Nothing<std::vector<std::string>>(); |
| } |
| // 7c vi. If canonicalizedTag is not an element of seen, append |
| // canonicalizedTag as the last element of seen. |
| if (std::find(seen.begin(), seen.end(), canonicalized_tag) == seen.end()) { |
| seen.push_back(canonicalized_tag); |
| } |
| // 7d. Increase k by 1. (See loop header.) |
| // Optimization: some callers only need one result. |
| if (only_return_one_result) return Just(seen); |
| } |
| // 8. Return seen. |
| return Just(seen); |
| } |
| |
| // ecma402 #sup-string.prototype.tolocalelowercase |
| // ecma402 #sup-string.prototype.tolocaleuppercase |
| MaybeHandle<String> Intl::StringLocaleConvertCase(Isolate* isolate, |
| Handle<String> s, |
| bool to_upper, |
| Handle<Object> locales) { |
| std::vector<std::string> requested_locales; |
| if (!CanonicalizeLocaleList(isolate, locales, true).To(&requested_locales)) { |
| return MaybeHandle<String>(); |
| } |
| std::string requested_locale = requested_locales.size() == 0 |
| ? DefaultLocale(isolate) |
| : requested_locales[0]; |
| size_t dash = requested_locale.find('-'); |
| if (dash != std::string::npos) { |
| requested_locale = requested_locale.substr(0, dash); |
| } |
| |
| // Primary language tag can be up to 8 characters long in theory. |
| // https://tools.ietf.org/html/bcp47#section-2.2.1 |
| DCHECK_LE(requested_locale.length(), 8); |
| s = String::Flatten(isolate, s); |
| |
| // All the languages requiring special-handling have two-letter codes. |
| // Note that we have to check for '!= 2' here because private-use language |
| // tags (x-foo) or grandfathered irregular tags (e.g. i-enochian) would have |
| // only 'x' or 'i' when they get here. |
| if (V8_UNLIKELY(requested_locale.length() != 2)) { |
| if (to_upper) { |
| return ConvertToUpper(isolate, s); |
| } |
| return ConvertToLower(isolate, s); |
| } |
| // TODO(jshin): Consider adding a fast path for ASCII or Latin-1. The fastpath |
| // in the root locale needs to be adjusted for az, lt and tr because even case |
| // mapping of ASCII range characters are different in those locales. |
| // Greek (el) does not require any adjustment. |
| if (V8_UNLIKELY((requested_locale == "tr") || (requested_locale == "el") || |
| (requested_locale == "lt") || (requested_locale == "az"))) { |
| return LocaleConvertCase(isolate, s, to_upper, requested_locale.c_str()); |
| } else { |
| if (to_upper) { |
| return ConvertToUpper(isolate, s); |
| } |
| return ConvertToLower(isolate, s); |
| } |
| } |
| |
| MaybeHandle<Object> Intl::StringLocaleCompare(Isolate* isolate, |
| Handle<String> string1, |
| Handle<String> string2, |
| Handle<Object> locales, |
| Handle<Object> options) { |
| // We only cache the instance when both locales and options are undefined, |
| // as that is the only case when the specified side-effects of examining |
| // those arguments are unobservable. |
| bool can_cache = |
| locales->IsUndefined(isolate) && options->IsUndefined(isolate); |
| if (can_cache) { |
| // Both locales and options are undefined, check the cache. |
| icu::Collator* cached_icu_collator = |
| static_cast<icu::Collator*>(isolate->get_cached_icu_object( |
| Isolate::ICUObjectCacheType::kDefaultCollator)); |
| // We may use the cached icu::Collator for a fast path. |
| if (cached_icu_collator != nullptr) { |
| return Intl::CompareStrings(isolate, *cached_icu_collator, string1, |
| string2); |
| } |
| } |
| |
| Handle<JSFunction> constructor = Handle<JSFunction>( |
| JSFunction::cast( |
| isolate->context()->native_context()->intl_collator_function()), |
| isolate); |
| |
| Handle<JSCollator> collator; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, collator, |
| New<JSCollator>(isolate, constructor, locales, options), Object); |
| if (can_cache) { |
| isolate->set_icu_object_in_cache( |
| Isolate::ICUObjectCacheType::kDefaultCollator, |
| std::static_pointer_cast<icu::UObject>( |
| collator->icu_collator()->get())); |
| } |
| return Intl::CompareStrings(isolate, *(collator->icu_collator()->raw()), |
| string1, string2); |
| } |
| |
| // ecma402/#sec-collator-comparestrings |
| Handle<Object> Intl::CompareStrings(Isolate* isolate, |
| const icu::Collator& icu_collator, |
| Handle<String> string1, |
| Handle<String> string2) { |
| Factory* factory = isolate->factory(); |
| |
| string1 = String::Flatten(isolate, string1); |
| string2 = String::Flatten(isolate, string2); |
| |
| UCollationResult result; |
| UErrorCode status = U_ZERO_ERROR; |
| icu::UnicodeString string_val1 = Intl::ToICUUnicodeString(isolate, string1); |
| icu::UnicodeString string_val2 = Intl::ToICUUnicodeString(isolate, string2); |
| result = icu_collator.compare(string_val1, string_val2, status); |
| DCHECK(U_SUCCESS(status)); |
| |
| return factory->NewNumberFromInt(result); |
| } |
| |
| // ecma402/#sup-properties-of-the-number-prototype-object |
| MaybeHandle<String> Intl::NumberToLocaleString(Isolate* isolate, |
| Handle<Object> num, |
| Handle<Object> locales, |
| Handle<Object> options) { |
| Handle<Object> number_obj; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, number_obj, |
| Object::ToNumber(isolate, num), String); |
| |
| // Spec treats -0 and +0 as 0. |
| double number = number_obj->Number() + 0; |
| |
| // We only cache the instance when both locales and options are undefined, |
| // as that is the only case when the specified side-effects of examining |
| // those arguments are unobservable. |
| bool can_cache = |
| locales->IsUndefined(isolate) && options->IsUndefined(isolate); |
| if (can_cache) { |
| icu::NumberFormat* cached_number_format = |
| static_cast<icu::NumberFormat*>(isolate->get_cached_icu_object( |
| Isolate::ICUObjectCacheType::kDefaultNumberFormat)); |
| // We may use the cached icu::NumberFormat for a fast path. |
| if (cached_number_format != nullptr) { |
| return JSNumberFormat::FormatNumber(isolate, *cached_number_format, |
| number); |
| } |
| } |
| |
| Handle<JSFunction> constructor = Handle<JSFunction>( |
| JSFunction::cast( |
| isolate->context()->native_context()->intl_number_format_function()), |
| isolate); |
| Handle<JSNumberFormat> number_format; |
| // 2. Let numberFormat be ? Construct(%NumberFormat%, « locales, options »). |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, number_format, |
| New<JSNumberFormat>(isolate, constructor, locales, options), String); |
| |
| if (can_cache) { |
| isolate->set_icu_object_in_cache( |
| Isolate::ICUObjectCacheType::kDefaultNumberFormat, |
| std::static_pointer_cast<icu::UObject>( |
| number_format->icu_number_format()->get())); |
| } |
| |
| // Return FormatNumber(numberFormat, x). |
| return JSNumberFormat::FormatNumber( |
| isolate, *(number_format->icu_number_format()->raw()), number); |
| } |
| |
| namespace { |
| |
| // ecma402/#sec-defaultnumberoption |
| Maybe<int> DefaultNumberOption(Isolate* isolate, Handle<Object> value, int min, |
| int max, int fallback, Handle<String> property) { |
| // 2. Else, return fallback. |
| if (value->IsUndefined()) return Just(fallback); |
| |
| // 1. If value is not undefined, then |
| // a. Let value be ? ToNumber(value). |
| Handle<Object> value_num; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, value_num, Object::ToNumber(isolate, value), Nothing<int>()); |
| DCHECK(value_num->IsNumber()); |
| |
| // b. If value is NaN or less than minimum or greater than maximum, throw a |
| // RangeError exception. |
| if (value_num->IsNaN() || value_num->Number() < min || |
| value_num->Number() > max) { |
| THROW_NEW_ERROR_RETURN_VALUE( |
| isolate, |
| NewRangeError(MessageTemplate::kPropertyValueOutOfRange, property), |
| Nothing<int>()); |
| } |
| |
| // The max and min arguments are integers and the above check makes |
| // sure that we are within the integer range making this double to |
| // int conversion safe. |
| // |
| // c. Return floor(value). |
| return Just(FastD2I(floor(value_num->Number()))); |
| } |
| |
| // ecma402/#sec-getnumberoption |
| Maybe<int> GetNumberOption(Isolate* isolate, Handle<JSReceiver> options, |
| Handle<String> property, int min, int max, |
| int fallback) { |
| // 1. Let value be ? Get(options, property). |
| Handle<Object> value; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, value, JSReceiver::GetProperty(isolate, options, property), |
| Nothing<int>()); |
| |
| // Return ? DefaultNumberOption(value, minimum, maximum, fallback). |
| return DefaultNumberOption(isolate, value, min, max, fallback, property); |
| } |
| |
| Maybe<int> GetNumberOption(Isolate* isolate, Handle<JSReceiver> options, |
| const char* property, int min, int max, |
| int fallback) { |
| Handle<String> property_str = |
| isolate->factory()->NewStringFromAsciiChecked(property); |
| return GetNumberOption(isolate, options, property_str, min, max, fallback); |
| } |
| |
| } // namespace |
| |
| Maybe<bool> Intl::SetNumberFormatDigitOptions(Isolate* isolate, |
| icu::DecimalFormat* number_format, |
| Handle<JSReceiver> options, |
| int mnfd_default, |
| int mxfd_default) { |
| CHECK_NOT_NULL(number_format); |
| |
| // 5. Let mnid be ? GetNumberOption(options, "minimumIntegerDigits,", 1, 21, |
| // 1). |
| int mnid; |
| if (!GetNumberOption(isolate, options, "minimumIntegerDigits", 1, 21, 1) |
| .To(&mnid)) { |
| return Nothing<bool>(); |
| } |
| |
| // 6. Let mnfd be ? GetNumberOption(options, "minimumFractionDigits", 0, 20, |
| // mnfdDefault). |
| int mnfd; |
| if (!GetNumberOption(isolate, options, "minimumFractionDigits", 0, 20, |
| mnfd_default) |
| .To(&mnfd)) { |
| return Nothing<bool>(); |
| } |
| |
| // 7. Let mxfdActualDefault be max( mnfd, mxfdDefault ). |
| int mxfd_actual_default = std::max(mnfd, mxfd_default); |
| |
| // 8. Let mxfd be ? GetNumberOption(options, |
| // "maximumFractionDigits", mnfd, 20, mxfdActualDefault). |
| int mxfd; |
| if (!GetNumberOption(isolate, options, "maximumFractionDigits", mnfd, 20, |
| mxfd_actual_default) |
| .To(&mxfd)) { |
| return Nothing<bool>(); |
| } |
| |
| // 9. Let mnsd be ? Get(options, "minimumSignificantDigits"). |
| Handle<Object> mnsd_obj; |
| Handle<String> mnsd_str = |
| isolate->factory()->minimumSignificantDigits_string(); |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, mnsd_obj, JSReceiver::GetProperty(isolate, options, mnsd_str), |
| Nothing<bool>()); |
| |
| // 10. Let mxsd be ? Get(options, "maximumSignificantDigits"). |
| Handle<Object> mxsd_obj; |
| Handle<String> mxsd_str = |
| isolate->factory()->maximumSignificantDigits_string(); |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, mxsd_obj, JSReceiver::GetProperty(isolate, options, mxsd_str), |
| Nothing<bool>()); |
| |
| // 11. Set intlObj.[[MinimumIntegerDigits]] to mnid. |
| number_format->setMinimumIntegerDigits(mnid); |
| |
| // 12. Set intlObj.[[MinimumFractionDigits]] to mnfd. |
| number_format->setMinimumFractionDigits(mnfd); |
| |
| // 13. Set intlObj.[[MaximumFractionDigits]] to mxfd. |
| number_format->setMaximumFractionDigits(mxfd); |
| |
| bool significant_digits_used = false; |
| // 14. If mnsd is not undefined or mxsd is not undefined, then |
| if (!mnsd_obj->IsUndefined(isolate) || !mxsd_obj->IsUndefined(isolate)) { |
| // 14. a. Let mnsd be ? DefaultNumberOption(mnsd, 1, 21, 1). |
| int mnsd; |
| if (!DefaultNumberOption(isolate, mnsd_obj, 1, 21, 1, mnsd_str).To(&mnsd)) { |
| return Nothing<bool>(); |
| } |
| |
| // 14. b. Let mxsd be ? DefaultNumberOption(mxsd, mnsd, 21, 21). |
| int mxsd; |
| if (!DefaultNumberOption(isolate, mxsd_obj, mnsd, 21, 21, mxsd_str) |
| .To(&mxsd)) { |
| return Nothing<bool>(); |
| } |
| |
| significant_digits_used = true; |
| |
| // 14. c. Set intlObj.[[MinimumSignificantDigits]] to mnsd. |
| number_format->setMinimumSignificantDigits(mnsd); |
| |
| // 14. d. Set intlObj.[[MaximumSignificantDigits]] to mxsd. |
| number_format->setMaximumSignificantDigits(mxsd); |
| } |
| |
| number_format->setSignificantDigitsUsed(significant_digits_used); |
| number_format->setRoundingMode(icu::DecimalFormat::kRoundHalfUp); |
| return Just(true); |
| } |
| |
| namespace { |
| |
| // ecma402/#sec-bestavailablelocale |
| std::string BestAvailableLocale(const std::set<std::string>& available_locales, |
| const std::string& locale) { |
| // 1. Let candidate be locale. |
| std::string candidate = locale; |
| |
| // 2. Repeat, |
| while (true) { |
| // 2.a. If availableLocales contains an element equal to candidate, return |
| // candidate. |
| if (available_locales.find(candidate) != available_locales.end()) { |
| return candidate; |
| } |
| |
| // 2.b. Let pos be the character index of the last occurrence of "-" |
| // (U+002D) within candidate. If that character does not occur, return |
| // undefined. |
| size_t pos = candidate.rfind('-'); |
| if (pos == std::string::npos) { |
| return std::string(); |
| } |
| |
| // 2.c. If pos ≥ 2 and the character "-" occurs at index pos-2 of candidate, |
| // decrease pos by 2. |
| if (pos >= 2 && candidate[pos - 2] == '-') { |
| pos -= 2; |
| } |
| |
| // 2.d. Let candidate be the substring of candidate from position 0, |
| // inclusive, to position pos, exclusive. |
| candidate = candidate.substr(0, pos); |
| } |
| } |
| |
| struct ParsedLocale { |
| std::string no_extensions_locale; |
| std::string extension; |
| }; |
| |
| // Returns a struct containing a bcp47 tag without unicode extensions |
| // and the removed unicode extensions. |
| // |
| // For example, given 'en-US-u-co-emoji' returns 'en-US' and |
| // 'u-co-emoji'. |
| ParsedLocale ParseBCP47Locale(const std::string& locale) { |
| size_t length = locale.length(); |
| ParsedLocale parsed_locale; |
| |
| // Privateuse or grandfathered locales have no extension sequences. |
| if ((length > 1) && (locale[1] == '-')) { |
| // Check to make sure that this really is a grandfathered or |
| // privateuse extension. ICU can sometimes mess up the |
| // canonicalization. |
| CHECK(locale[0] == 'x' || locale[0] == 'i'); |
| parsed_locale.no_extensions_locale = locale; |
| return parsed_locale; |
| } |
| |
| size_t unicode_extension_start = locale.find("-u-"); |
| |
| // No unicode extensions found. |
| if (unicode_extension_start == std::string::npos) { |
| parsed_locale.no_extensions_locale = locale; |
| return parsed_locale; |
| } |
| |
| size_t private_extension_start = locale.find("-x-"); |
| |
| // Unicode extensions found within privateuse subtags don't count. |
| if (private_extension_start != std::string::npos && |
| private_extension_start < unicode_extension_start) { |
| parsed_locale.no_extensions_locale = locale; |
| return parsed_locale; |
| } |
| |
| const std::string beginning = locale.substr(0, unicode_extension_start); |
| size_t unicode_extension_end = length; |
| DCHECK_GT(length, 2); |
| |
| // Find the end of the extension production as per the bcp47 grammar |
| // by looking for '-' followed by 2 chars and then another '-'. |
| for (size_t i = unicode_extension_start + 1; i < length - 2; i++) { |
| if (locale[i] != '-') continue; |
| |
| if (locale[i + 2] == '-') { |
| unicode_extension_end = i; |
| break; |
| } |
| |
| i += 2; |
| } |
| |
| const std::string end = locale.substr(unicode_extension_end); |
| parsed_locale.no_extensions_locale = beginning + end; |
| parsed_locale.extension = locale.substr( |
| unicode_extension_start, unicode_extension_end - unicode_extension_start); |
| return parsed_locale; |
| } |
| |
| // ecma402/#sec-lookupsupportedlocales |
| std::vector<std::string> LookupSupportedLocales( |
| const std::set<std::string>& available_locales, |
| const std::vector<std::string>& requested_locales) { |
| // 1. Let subset be a new empty List. |
| std::vector<std::string> subset; |
| |
| // 2. For each element locale of requestedLocales in List order, do |
| for (const std::string& locale : requested_locales) { |
| // 2. a. Let noExtensionsLocale be the String value that is locale |
| // with all Unicode locale extension sequences removed. |
| std::string no_extension_locale = |
| ParseBCP47Locale(locale).no_extensions_locale; |
| |
| // 2. b. Let availableLocale be |
| // BestAvailableLocale(availableLocales, noExtensionsLocale). |
| std::string available_locale = |
| BestAvailableLocale(available_locales, no_extension_locale); |
| |
| // 2. c. If availableLocale is not undefined, append locale to the |
| // end of subset. |
| if (!available_locale.empty()) { |
| subset.push_back(locale); |
| } |
| } |
| |
| // 3. Return subset. |
| return subset; |
| } |
| |
| // ECMA 402 9.2.8 BestFitSupportedLocales(availableLocales, requestedLocales) |
| // https://tc39.github.io/ecma402/#sec-bestfitsupportedlocales |
| std::vector<std::string> BestFitSupportedLocales( |
| const std::set<std::string>& available_locales, |
| const std::vector<std::string>& requested_locales) { |
| return LookupSupportedLocales(available_locales, requested_locales); |
| } |
| |
| // ecma262 #sec-createarrayfromlist |
| Handle<JSArray> CreateArrayFromList(Isolate* isolate, |
| std::vector<std::string> elements, |
| PropertyAttributes attr) { |
| Factory* factory = isolate->factory(); |
| // Let array be ! ArrayCreate(0). |
| Handle<JSArray> array = factory->NewJSArray(0); |
| |
| uint32_t length = static_cast<uint32_t>(elements.size()); |
| // 3. Let n be 0. |
| // 4. For each element e of elements, do |
| for (uint32_t i = 0; i < length; i++) { |
| // a. Let status be CreateDataProperty(array, ! ToString(n), e). |
| const std::string& part = elements[i]; |
| Handle<String> value = |
| factory->NewStringFromUtf8(CStrVector(part.c_str())).ToHandleChecked(); |
| JSObject::AddDataElement(array, i, value, attr); |
| } |
| // 5. Return array. |
| return array; |
| } |
| |
| // TODO(bstell): should this be moved somewhere where it is reusable? |
| // Implement steps 5, 6, 7 for ECMA 402 9.2.9 SupportedLocales |
| // https://tc39.github.io/ecma402/#sec-supportedlocales |
| MaybeHandle<JSObject> CreateReadOnlyArray(Isolate* isolate, |
| std::vector<std::string> elements) { |
| if (elements.size() >= kMaxUInt32) { |
| THROW_NEW_ERROR( |
| isolate, NewRangeError(MessageTemplate::kInvalidArrayLength), JSObject); |
| } |
| |
| PropertyAttributes attr = |
| static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE); |
| |
| // 5. Let subset be CreateArrayFromList(elements). |
| Handle<JSArray> subset = CreateArrayFromList(isolate, elements, attr); |
| |
| // 6. Let keys be subset.[[OwnPropertyKeys]](). |
| |
| // 7.a. Let desc be PropertyDescriptor { [[Configurable]]: false, |
| // [[Writable]]: false }. |
| PropertyDescriptor desc; |
| desc.set_writable(false); |
| desc.set_configurable(false); |
| |
| // 7.b. Perform ! DefinePropertyOrThrow(subset, P, desc). |
| JSArray::ArraySetLength(isolate, subset, &desc, kThrowOnError).ToChecked(); |
| return subset; |
| } |
| |
| // ECMA 402 9.2.9 SupportedLocales(availableLocales, requestedLocales, options) |
| // https://tc39.github.io/ecma402/#sec-supportedlocales |
| MaybeHandle<JSObject> SupportedLocales( |
| Isolate* isolate, const char* method, |
| const std::set<std::string>& available_locales, |
| const std::vector<std::string>& requested_locales, Handle<Object> options) { |
| std::vector<std::string> supported_locales; |
| |
| // 2. Else, let matcher be "best fit". |
| Intl::MatcherOption matcher = Intl::MatcherOption::kBestFit; |
| |
| // 1. If options is not undefined, then |
| if (!options->IsUndefined(isolate)) { |
| // 1. a. Let options be ? ToObject(options). |
| Handle<JSReceiver> options_obj; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, options_obj, |
| Object::ToObject(isolate, options), JSObject); |
| |
| // 1. b. Let matcher be ? GetOption(options, "localeMatcher", "string", |
| // « "lookup", "best fit" », "best fit"). |
| Maybe<Intl::MatcherOption> maybe_locale_matcher = |
| Intl::GetLocaleMatcher(isolate, options_obj, method); |
| MAYBE_RETURN(maybe_locale_matcher, MaybeHandle<JSObject>()); |
| matcher = maybe_locale_matcher.FromJust(); |
| } |
| |
| // 3. If matcher is "best fit", then |
| // a. Let supportedLocales be BestFitSupportedLocales(availableLocales, |
| // requestedLocales). |
| if (matcher == Intl::MatcherOption::kBestFit) { |
| supported_locales = |
| BestFitSupportedLocales(available_locales, requested_locales); |
| } else { |
| // 4. Else, |
| // a. Let supportedLocales be LookupSupportedLocales(availableLocales, |
| // requestedLocales). |
| DCHECK_EQ(matcher, Intl::MatcherOption::kLookup); |
| supported_locales = |
| LookupSupportedLocales(available_locales, requested_locales); |
| } |
| |
| // TODO(jkummerow): Possibly revisit why the spec has the individual entries |
| // readonly but the array is not frozen. |
| // https://github.com/tc39/ecma402/issues/258 |
| |
| // 5. Let subset be CreateArrayFromList(supportedLocales). |
| // 6. Let keys be subset.[[OwnPropertyKeys]](). |
| // 7. For each element P of keys in List order, do |
| // a. Let desc be PropertyDescriptor { [[Configurable]]: false, |
| // [[Writable]]: false }. |
| // b. Perform ! DefinePropertyOrThrow(subset, P, desc). |
| MaybeHandle<JSObject> subset = |
| CreateReadOnlyArray(isolate, supported_locales); |
| |
| // 8. Return subset. |
| return subset; |
| } |
| } // namespace |
| |
| // ecma-402 #sec-intl.getcanonicallocales |
| MaybeHandle<JSArray> Intl::GetCanonicalLocales(Isolate* isolate, |
| Handle<Object> locales) { |
| // 1. Let ll be ? CanonicalizeLocaleList(locales). |
| Maybe<std::vector<std::string>> maybe_ll = |
| CanonicalizeLocaleList(isolate, locales, false); |
| MAYBE_RETURN(maybe_ll, MaybeHandle<JSArray>()); |
| |
| // 2. Return CreateArrayFromList(ll). |
| PropertyAttributes attr = static_cast<PropertyAttributes>(NONE); |
| return CreateArrayFromList(isolate, maybe_ll.FromJust(), attr); |
| } |
| |
| // ECMA 402 Intl.*.supportedLocalesOf |
| MaybeHandle<JSObject> Intl::SupportedLocalesOf( |
| Isolate* isolate, const char* method, |
| const std::set<std::string>& available_locales, Handle<Object> locales, |
| Handle<Object> options) { |
| // Let availableLocales be %Collator%.[[AvailableLocales]]. |
| |
| // Let requestedLocales be ? CanonicalizeLocaleList(locales). |
| Maybe<std::vector<std::string>> requested_locales = |
| CanonicalizeLocaleList(isolate, locales, false); |
| MAYBE_RETURN(requested_locales, MaybeHandle<JSObject>()); |
| |
| // Return ? SupportedLocales(availableLocales, requestedLocales, options). |
| return SupportedLocales(isolate, method, available_locales, |
| requested_locales.FromJust(), options); |
| } |
| |
| namespace { |
| |
| std::map<std::string, std::string> LookupAndValidateUnicodeExtensions( |
| icu::Locale* icu_locale, const std::set<std::string>& relevant_keys) { |
| std::map<std::string, std::string> extensions; |
| |
| UErrorCode status = U_ZERO_ERROR; |
| std::unique_ptr<icu::StringEnumeration> keywords( |
| icu_locale->createKeywords(status)); |
| if (U_FAILURE(status)) return extensions; |
| |
| if (!keywords) return extensions; |
| char value[ULOC_FULLNAME_CAPACITY]; |
| |
| int32_t length; |
| status = U_ZERO_ERROR; |
| for (const char* keyword = keywords->next(&length, status); |
| keyword != nullptr; keyword = keywords->next(&length, status)) { |
| // Ignore failures in ICU and skip to the next keyword. |
| // |
| // This is fine.â„¢ |
| if (U_FAILURE(status)) { |
| status = U_ZERO_ERROR; |
| continue; |
| } |
| |
| icu_locale->getKeywordValue(keyword, value, ULOC_FULLNAME_CAPACITY, status); |
| |
| // Ignore failures in ICU and skip to the next keyword. |
| // |
| // This is fine.â„¢ |
| if (U_FAILURE(status)) { |
| status = U_ZERO_ERROR; |
| continue; |
| } |
| |
| const char* bcp47_key = uloc_toUnicodeLocaleKey(keyword); |
| |
| if (bcp47_key && (relevant_keys.find(bcp47_key) != relevant_keys.end())) { |
| const char* bcp47_value = uloc_toUnicodeLocaleType(bcp47_key, value); |
| extensions.insert( |
| std::pair<std::string, std::string>(bcp47_key, bcp47_value)); |
| } else { |
| status = U_ZERO_ERROR; |
| icu_locale->setKeywordValue(keyword, nullptr, status); |
| CHECK(U_SUCCESS(status)); |
| } |
| } |
| |
| return extensions; |
| } |
| |
| // ecma402/#sec-lookupmatcher |
| std::string LookupMatcher(Isolate* isolate, |
| const std::set<std::string>& available_locales, |
| const std::vector<std::string>& requested_locales) { |
| // 1. Let result be a new Record. |
| std::string result; |
| |
| // 2. For each element locale of requestedLocales in List order, do |
| for (const std::string& locale : requested_locales) { |
| // 2. a. Let noExtensionsLocale be the String value that is locale |
| // with all Unicode locale extension sequences removed. |
| ParsedLocale parsed_locale = ParseBCP47Locale(locale); |
| std::string no_extensions_locale = parsed_locale.no_extensions_locale; |
| |
| // 2. b. Let availableLocale be |
| // BestAvailableLocale(availableLocales, noExtensionsLocale). |
| std::string available_locale = |
| BestAvailableLocale(available_locales, no_extensions_locale); |
| |
| // 2. c. If availableLocale is not undefined, append locale to the |
| // end of subset. |
| if (!available_locale.empty()) { |
| // Note: The following steps are not performed here because we |
| // can use ICU to parse the unicode locale extension sequence |
| // as part of Intl::ResolveLocale. |
| // |
| // There's no need to separate the unicode locale extensions |
| // right here. Instead just return the available locale with the |
| // extensions. |
| // |
| // 2. c. i. Set result.[[locale]] to availableLocale. |
| // 2. c. ii. If locale and noExtensionsLocale are not the same |
| // String value, then |
| // 2. c. ii. 1. Let extension be the String value consisting of |
| // the first substring of locale that is a Unicode locale |
| // extension sequence. |
| // 2. c. ii. 2. Set result.[[extension]] to extension. |
| // 2. c. iii. Return result. |
| return available_locale + parsed_locale.extension; |
| } |
| } |
| |
| // 3. Let defLocale be DefaultLocale(); |
| // 4. Set result.[[locale]] to defLocale. |
| // 5. Return result. |
| return DefaultLocale(isolate); |
| } |
| |
| } // namespace |
| |
| // This function doesn't correspond exactly with the spec. Instead |
| // we use ICU to do all the string manipulations that the spec |
| // peforms. |
| // |
| // The spec uses this function to normalize values for various |
| // relevant extension keys (such as disallowing "search" for |
| // collation). Instead of doing this here, we let the callers of |
| // this method perform such normalization. |
| // |
| // ecma402/#sec-resolvelocale |
| Intl::ResolvedLocale Intl::ResolveLocale( |
| Isolate* isolate, const std::set<std::string>& available_locales, |
| const std::vector<std::string>& requested_locales, MatcherOption matcher, |
| const std::set<std::string>& relevant_extension_keys) { |
| std::string locale; |
| if (matcher == Intl::MatcherOption::kLookup) { |
| locale = LookupMatcher(isolate, available_locales, requested_locales); |
| } else if (matcher == Intl::MatcherOption::kBestFit) { |
| // TODO(intl): Implement better lookup algorithm. |
| locale = LookupMatcher(isolate, available_locales, requested_locales); |
| } |
| |
| icu::Locale icu_locale = CreateICULocale(locale); |
| std::map<std::string, std::string> extensions = |
| LookupAndValidateUnicodeExtensions(&icu_locale, relevant_extension_keys); |
| |
| char canonicalized_locale[ULOC_FULLNAME_CAPACITY]; |
| UErrorCode status = U_ZERO_ERROR; |
| uloc_toLanguageTag(icu_locale.getName(), canonicalized_locale, |
| ULOC_FULLNAME_CAPACITY, true, &status); |
| CHECK(U_SUCCESS(status)); |
| |
| // TODO(gsathya): Remove privateuse subtags from extensions. |
| |
| return Intl::ResolvedLocale{canonicalized_locale, icu_locale, extensions}; |
| } |
| |
| Managed<icu::UnicodeString>* Intl::SetTextToBreakIterator( |
| Isolate* isolate, Handle<String> text, icu::BreakIterator* break_iterator) { |
| icu::UnicodeString* u_text = |
| (icu::UnicodeString*)(Intl::ToICUUnicodeString(isolate, text).clone()); |
| |
| Handle<Managed<icu::UnicodeString>> new_u_text = |
| Managed<icu::UnicodeString>::FromRawPtr(isolate, 0, u_text); |
| |
| break_iterator->setText(*u_text); |
| return *new_u_text; |
| } |
| |
| // ecma262 #sec-string.prototype.normalize |
| MaybeHandle<String> Intl::Normalize(Isolate* isolate, Handle<String> string, |
| Handle<Object> form_input) { |
| const char* form_name; |
| UNormalization2Mode form_mode; |
| if (form_input->IsUndefined(isolate)) { |
| // default is FNC |
| form_name = "nfc"; |
| form_mode = UNORM2_COMPOSE; |
| } else { |
| Handle<String> form; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, form, |
| Object::ToString(isolate, form_input), String); |
| |
| if (String::Equals(isolate, form, isolate->factory()->NFC_string())) { |
| form_name = "nfc"; |
| form_mode = UNORM2_COMPOSE; |
| } else if (String::Equals(isolate, form, |
| isolate->factory()->NFD_string())) { |
| form_name = "nfc"; |
| form_mode = UNORM2_DECOMPOSE; |
| } else if (String::Equals(isolate, form, |
| isolate->factory()->NFKC_string())) { |
| form_name = "nfkc"; |
| form_mode = UNORM2_COMPOSE; |
| } else if (String::Equals(isolate, form, |
| isolate->factory()->NFKD_string())) { |
| form_name = "nfkc"; |
| form_mode = UNORM2_DECOMPOSE; |
| } else { |
| Handle<String> valid_forms = |
| isolate->factory()->NewStringFromStaticChars("NFC, NFD, NFKC, NFKD"); |
| THROW_NEW_ERROR( |
| isolate, |
| NewRangeError(MessageTemplate::kNormalizationForm, valid_forms), |
| String); |
| } |
| } |
| |
| int length = string->length(); |
| string = String::Flatten(isolate, string); |
| icu::UnicodeString result; |
| std::unique_ptr<uc16[]> sap; |
| UErrorCode status = U_ZERO_ERROR; |
| icu::UnicodeString input = ToICUUnicodeString(isolate, string); |
| // Getting a singleton. Should not free it. |
| const icu::Normalizer2* normalizer = |
| icu::Normalizer2::getInstance(nullptr, form_name, form_mode, status); |
| DCHECK(U_SUCCESS(status)); |
| CHECK_NOT_NULL(normalizer); |
| int32_t normalized_prefix_length = |
| normalizer->spanQuickCheckYes(input, status); |
| // Quick return if the input is already normalized. |
| if (length == normalized_prefix_length) return string; |
| icu::UnicodeString unnormalized = |
| input.tempSubString(normalized_prefix_length); |
| // Read-only alias of the normalized prefix. |
| result.setTo(false, input.getBuffer(), normalized_prefix_length); |
| // copy-on-write; normalize the suffix and append to |result|. |
| normalizer->normalizeSecondAndAppend(result, unnormalized, status); |
| |
| if (U_FAILURE(status)) { |
| THROW_NEW_ERROR(isolate, NewTypeError(MessageTemplate::kIcuError), String); |
| } |
| |
| return Intl::ToString(isolate, result); |
| } |
| |
| // ICUTimezoneCache calls out to ICU for TimezoneCache |
| // functionality in a straightforward way. |
| class ICUTimezoneCache : public base::TimezoneCache { |
| public: |
| ICUTimezoneCache() : timezone_(nullptr) { Clear(); } |
| |
| ~ICUTimezoneCache() override { Clear(); }; |
| |
| const char* LocalTimezone(double time_ms) override; |
| |
| double DaylightSavingsOffset(double time_ms) override; |
| |
| double LocalTimeOffset(double time_ms, bool is_utc) override; |
| |
| void Clear() override; |
| |
| private: |
| icu::TimeZone* GetTimeZone(); |
| |
| bool GetOffsets(double time_ms, bool is_utc, int32_t* raw_offset, |
| int32_t* dst_offset); |
| |
| icu::TimeZone* timezone_; |
| |
| std::string timezone_name_; |
| std::string dst_timezone_name_; |
| }; |
| |
| const char* ICUTimezoneCache::LocalTimezone(double time_ms) { |
| bool is_dst = DaylightSavingsOffset(time_ms) != 0; |
| std::string* name = is_dst ? &dst_timezone_name_ : &timezone_name_; |
| if (name->empty()) { |
| icu::UnicodeString result; |
| GetTimeZone()->getDisplayName(is_dst, icu::TimeZone::LONG, result); |
| result += '\0'; |
| |
| icu::StringByteSink<std::string> byte_sink(name); |
| result.toUTF8(byte_sink); |
| } |
| DCHECK(!name->empty()); |
| return name->c_str(); |
| } |
| |
| icu::TimeZone* ICUTimezoneCache::GetTimeZone() { |
| if (timezone_ == nullptr) { |
| timezone_ = icu::TimeZone::createDefault(); |
| } |
| return timezone_; |
| } |
| |
| bool ICUTimezoneCache::GetOffsets(double time_ms, bool is_utc, |
| int32_t* raw_offset, int32_t* dst_offset) { |
| UErrorCode status = U_ZERO_ERROR; |
| // TODO(jshin): ICU TimeZone class handles skipped time differently from |
| // Ecma 262 (https://github.com/tc39/ecma262/pull/778) and icu::TimeZone |
| // class does not expose the necessary API. Fixing |
| // http://bugs.icu-project.org/trac/ticket/13268 would make it easy to |
| // implement the proposed spec change. A proposed fix for ICU is |
| // https://chromium-review.googlesource.com/851265 . |
| // In the meantime, use an internal (still public) API of icu::BasicTimeZone. |
| // Once it's accepted by the upstream, get rid of cast. Note that casting |
| // TimeZone to BasicTimeZone is safe because we know that icu::TimeZone used |
| // here is a BasicTimeZone. |
| if (is_utc) { |
| GetTimeZone()->getOffset(time_ms, false, *raw_offset, *dst_offset, status); |
| } else { |
| static_cast<const icu::BasicTimeZone*>(GetTimeZone()) |
| ->getOffsetFromLocal(time_ms, icu::BasicTimeZone::kFormer, |
| icu::BasicTimeZone::kFormer, *raw_offset, |
| *dst_offset, status); |
| } |
| |
| return U_SUCCESS(status); |
| } |
| |
| double ICUTimezoneCache::DaylightSavingsOffset(double time_ms) { |
| int32_t raw_offset, dst_offset; |
| if (!GetOffsets(time_ms, true, &raw_offset, &dst_offset)) return 0; |
| return dst_offset; |
| } |
| |
| double ICUTimezoneCache::LocalTimeOffset(double time_ms, bool is_utc) { |
| int32_t raw_offset, dst_offset; |
| if (!GetOffsets(time_ms, is_utc, &raw_offset, &dst_offset)) return 0; |
| return raw_offset + dst_offset; |
| } |
| |
| void ICUTimezoneCache::Clear() { |
| delete timezone_; |
| timezone_ = nullptr; |
| timezone_name_.clear(); |
| dst_timezone_name_.clear(); |
| } |
| |
| base::TimezoneCache* Intl::CreateTimeZoneCache() { |
| return FLAG_icu_timezone_data ? new ICUTimezoneCache() |
| : base::OS::CreateTimezoneCache(); |
| } |
| |
| Maybe<Intl::CaseFirst> Intl::GetCaseFirst(Isolate* isolate, |
| Handle<JSReceiver> options, |
| const char* method) { |
| return Intl::GetStringOption<Intl::CaseFirst>( |
| isolate, options, "caseFirst", method, {"upper", "lower", "false"}, |
| {Intl::CaseFirst::kUpper, Intl::CaseFirst::kLower, |
| Intl::CaseFirst::kFalse}, |
| Intl::CaseFirst::kUndefined); |
| } |
| |
| Maybe<Intl::HourCycle> Intl::GetHourCycle(Isolate* isolate, |
| Handle<JSReceiver> options, |
| const char* method) { |
| return Intl::GetStringOption<Intl::HourCycle>( |
| isolate, options, "hourCycle", method, {"h11", "h12", "h23", "h24"}, |
| {Intl::HourCycle::kH11, Intl::HourCycle::kH12, Intl::HourCycle::kH23, |
| Intl::HourCycle::kH24}, |
| Intl::HourCycle::kUndefined); |
| } |
| |
| Maybe<Intl::MatcherOption> Intl::GetLocaleMatcher(Isolate* isolate, |
| Handle<JSReceiver> options, |
| const char* method) { |
| return Intl::GetStringOption<Intl::MatcherOption>( |
| isolate, options, "localeMatcher", method, {"best fit", "lookup"}, |
| {Intl::MatcherOption::kLookup, Intl::MatcherOption::kBestFit}, |
| Intl::MatcherOption::kLookup); |
| } |
| } // namespace internal |
| } // namespace v8 |