blob: 0c62dcde7476611dc0765f061c61851b63376a9f [file] [log] [blame]
// 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/api-inl.h"
#include "src/execution/isolate.h"
#include "src/handles/global-handles.h"
#include "src/heap/factory.h"
#include "src/objects/js-collator-inl.h"
#include "src/objects/js-date-time-format-inl.h"
#include "src/objects/js-locale-inl.h"
#include "src/objects/js-number-format-inl.h"
#include "src/objects/objects-inl.h"
#include "src/objects/property-descriptor.h"
#include "src/objects/string.h"
#include "src/strings/string-case.h"
#include "unicode/basictz.h"
#include "unicode/brkiter.h"
#include "unicode/calendar.h"
#include "unicode/coll.h"
#include "unicode/datefmt.h"
#include "unicode/decimfmt.h"
#include "unicode/formattedvalue.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().begin(), length);
}
return reinterpret_cast<const UChar*>(dest->get());
} else {
return reinterpret_cast<const UChar*>(flat.ToUC16Vector().begin());
}
}
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) {
DCHECK(string->IsFlat());
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.IsOneByteRepresentation());
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().begin();
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().begin();
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->IsOneByteRepresentation()) {
// 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->IsOneByteRepresentation() && 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.begin()), 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;
icu::Locale icu_locale = icu::Locale::forLanguageTag(bcp47_locale, status);
CHECK(U_SUCCESS(status));
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;
for (int32_t i = 0; i < count; ++i) {
std::string locale =
Intl::ToLanguageTag(icu_available_locales[i]).FromJust();
locales.insert(locale);
std::string shortened_locale;
if (RemoveLocaleScriptTag(locale, &shortened_locale)) {
std::replace(shortened_locale.begin(), shortened_locale.end(), '_', '-');
locales.insert(shortened_locale);
}
}
return locales;
}
Maybe<std::string> Intl::ToLanguageTag(const icu::Locale& locale) {
UErrorCode status = U_ZERO_ERROR;
std::string res = locale.toLanguageTag<std::string>(status);
if (U_FAILURE(status)) {
return Nothing<std::string>();
}
CHECK(U_SUCCESS(status));
// Hack to remove -true and -yes from unicode extensions
// Address https://crbug.com/v8/8565
// TODO(ftang): Move the following "remove true" logic into ICU toLanguageTag
// by fixing ICU-20310.
size_t u_ext_start = res.find("-u-");
if (u_ext_start != std::string::npos) {
// remove "-true" and "-yes" after -u-
const std::vector<std::string> remove_items({"-true", "-yes"});
for (auto item = remove_items.begin(); item != remove_items.end(); item++) {
for (size_t sep_remove =
res.find(*item, u_ext_start + 5 /* strlen("-u-xx") == 5 */);
sep_remove != std::string::npos; sep_remove = res.find(*item)) {
size_t end_of_sep_remove = sep_remove + item->length();
if (res.length() == end_of_sep_remove ||
res.at(end_of_sep_remove) == '-') {
res.erase(sep_remove, item->length());
}
}
}
}
return Just(res);
}
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 ||
strcmp(default_locale.getName(), "c") == 0) {
isolate->set_default_locale("en-US");
} else {
// Set the locale
isolate->set_default_locale(
default_locale.isBogus()
? "und"
: Intl::ToLanguageTag(default_locale).FromJust());
}
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" ||
locale == "mo";
}
// 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());
return Intl::CanonicalizeLanguageTag(isolate, locale);
}
Maybe<std::string> Intl::CanonicalizeLanguageTag(Isolate* isolate,
const std::string& locale_in) {
std::string locale = locale_in;
if (locale.length() == 0 ||
!String::IsAscii(locale.data(), static_cast<int>(locale.length()))) {
THROW_NEW_ERROR_RETURN_VALUE(
isolate,
NewRangeError(
MessageTemplate::kInvalidLanguageTag,
isolate->factory()->NewStringFromAsciiChecked(locale.c_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;
// 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.
icu::Locale icu_locale = icu::Locale::forLanguageTag(locale.c_str(), error);
if (U_FAILURE(error) || icu_locale.isBogus()) {
THROW_NEW_ERROR_RETURN_VALUE(
isolate,
NewRangeError(
MessageTemplate::kInvalidLanguageTag,
isolate->factory()->NewStringFromAsciiChecked(locale.c_str())),
Nothing<std::string>());
}
Maybe<std::string> maybe_to_language_tag = Intl::ToLanguageTag(icu_locale);
if (maybe_to_language_tag.IsNothing()) {
THROW_NEW_ERROR_RETURN_VALUE(
isolate,
NewRangeError(
MessageTemplate::kInvalidLanguageTag,
isolate->factory()->NewStringFromAsciiChecked(locale.c_str())),
Nothing<std::string>());
}
return maybe_to_language_tag;
}
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 or locales has an [[InitializedLocale]]
// internal slot, then
if (locales->IsJSLocale()) {
// Since this value came from JSLocale, which is already went though the
// CanonializeLanguageTag process once, therefore there are no need to
// call CanonializeLanguageTag again.
seen.push_back(JSLocale::ToString(Handle<JSLocale>::cast(locales)));
return Just(seen);
}
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. If Type(kValue) is Object and kValue has an [[InitializedLocale]]
// internal slot, then
std::string canonicalized_tag;
if (k_value->IsJSLocale()) {
// 7c iii. 1. Let tag be kValue.[[Locale]].
canonicalized_tag = JSLocale::ToString(Handle<JSLocale>::cast(k_value));
// 7c iv. Else,
} else {
// 7c iv 1. Let tag be ? ToString(kValue).
// 7c v. If IsStructurallyValidLanguageTag(tag) is false, throw a
// RangeError exception.
// 7c vi. Let canonicalizedTag be CanonicalizeLanguageTag(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::UMemory>(collator->icu_collator().get()));
}
icu::Collator* icu_collator = collator->icu_collator().raw();
return Intl::CompareStrings(isolate, *icu_collator, 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();
// Early return for identical strings.
if (string1.is_identical_to(string2)) {
return factory->NewNumberFromInt(UCollationResult::UCOL_EQUAL);
}
// Early return for empty strings.
if (string1->length() == 0) {
return factory->NewNumberFromInt(string2->length() == 0
? UCollationResult::UCOL_EQUAL
: UCollationResult::UCOL_LESS);
}
if (string2->length() == 0) {
return factory->NewNumberFromInt(UCollationResult::UCOL_GREATER);
}
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> numeric_obj;
if (FLAG_harmony_intl_bigint) {
ASSIGN_RETURN_ON_EXCEPTION(isolate, numeric_obj,
Object::ToNumeric(isolate, num), String);
} else {
ASSIGN_RETURN_ON_EXCEPTION(isolate, numeric_obj,
Object::ToNumber(isolate, num), String);
}
// 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::number::LocalizedNumberFormatter* cached_number_format =
static_cast<icu::number::LocalizedNumberFormatter*>(
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::FormatNumeric(isolate, *cached_number_format,
numeric_obj);
}
}
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::UMemory>(
number_format->icu_number_formatter().get()));
}
// Return FormatNumber(numberFormat, x).
icu::number::LocalizedNumberFormatter* icu_number_format =
number_format->icu_number_formatter().raw();
return JSNumberFormat::FormatNumeric(isolate, *icu_number_format,
numeric_obj);
}
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<Intl::NumberFormatDigitOptions> Intl::SetNumberFormatDigitOptions(
Isolate* isolate, Handle<JSReceiver> options, int mnfd_default,
int mxfd_default) {
Intl::NumberFormatDigitOptions digit_options;
// 5. Let mnid be ? GetNumberOption(options, "minimumIntegerDigits,", 1, 21,
// 1).
int mnid;
if (!GetNumberOption(isolate, options, "minimumIntegerDigits", 1, 21, 1)
.To(&mnid)) {
return Nothing<NumberFormatDigitOptions>();
}
// 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<NumberFormatDigitOptions>();
}
// 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<NumberFormatDigitOptions>();
}
// 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<NumberFormatDigitOptions>());
// 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<NumberFormatDigitOptions>());
// 11. Set intlObj.[[MinimumIntegerDigits]] to mnid.
digit_options.minimum_integer_digits = mnid;
// 12. Set intlObj.[[MinimumFractionDigits]] to mnfd.
digit_options.minimum_fraction_digits = mnfd;
// 13. Set intlObj.[[MaximumFractionDigits]] to mxfd.
digit_options.maximum_fraction_digits = mxfd;
// 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<NumberFormatDigitOptions>();
}
// 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<NumberFormatDigitOptions>();
}
// 14. c. Set intlObj.[[MinimumSignificantDigits]] to mnsd.
digit_options.minimum_significant_digits = mnsd;
// 14. d. Set intlObj.[[MaximumSignificantDigits]] to mxsd.
digit_options.maximum_significant_digits = mxsd;
} else {
digit_options.minimum_significant_digits = 0;
digit_options.maximum_significant_digits = 0;
}
return Just(digit_options);
}
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;
}
// 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);
}
// 5. Return CreateArrayFromList(supportedLocales).
PropertyAttributes attr = static_cast<PropertyAttributes>(NONE);
return CreateArrayFromList(isolate, supported_locales, attr);
}
} // 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 {
template <typename T>
bool IsValidExtension(const icu::Locale& locale, const char* key,
const std::string& value) {
const char* legacy_type = uloc_toLegacyType(key, value.c_str());
if (legacy_type == nullptr) {
return false;
}
UErrorCode status = U_ZERO_ERROR;
std::unique_ptr<icu::StringEnumeration> enumeration(
T::getKeywordValuesForLocale(key, icu::Locale(locale.getBaseName()),
false, status));
if (U_FAILURE(status)) {
return false;
}
int32_t length;
for (const char* item = enumeration->next(&length, status);
U_SUCCESS(status) && item != nullptr;
item = enumeration->next(&length, status)) {
if (strcmp(legacy_type, item) == 0) {
return true;
}
}
return false;
}
bool IsValidCollation(const icu::Locale& locale, const std::string& value) {
std::set<std::string> invalid_values = {"standard", "search"};
if (invalid_values.find(value) != invalid_values.end()) return false;
return IsValidExtension<icu::Collator>(locale, "collation", value);
}
} // namespace
bool Intl::IsValidCalendar(const icu::Locale& locale,
const std::string& value) {
return IsValidExtension<icu::Calendar>(locale, "calendar", value);
}
namespace {
bool IsValidNumberingSystem(const std::string& value) {
std::set<std::string> invalid_values = {"native", "traditio", "finance"};
if (invalid_values.find(value) != invalid_values.end()) return false;
UErrorCode status = U_ZERO_ERROR;
std::unique_ptr<icu::NumberingSystem> numbering_system(
icu::NumberingSystem::createInstanceByName(value.c_str(), status));
return U_SUCCESS(status) && numbering_system.get() != nullptr;
}
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.™
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.™
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);
bool is_valid_value = false;
// 8.h.ii.1.a If keyLocaleData contains requestedValue, then
if (strcmp("ca", bcp47_key) == 0) {
is_valid_value = Intl::IsValidCalendar(*icu_locale, bcp47_value);
} else if (strcmp("co", bcp47_key) == 0) {
is_valid_value = IsValidCollation(*icu_locale, bcp47_value);
} else if (strcmp("hc", bcp47_key) == 0) {
// https://www.unicode.org/repos/cldr/tags/latest/common/bcp47/calendar.xml
std::set<std::string> valid_values = {"h11", "h12", "h23", "h24"};
is_valid_value = valid_values.find(bcp47_value) != valid_values.end();
} else if (strcmp("lb", bcp47_key) == 0) {
// https://www.unicode.org/repos/cldr/tags/latest/common/bcp47/segmentation.xml
std::set<std::string> valid_values = {"strict", "normal", "loose"};
is_valid_value = valid_values.find(bcp47_value) != valid_values.end();
} else if (strcmp("kn", bcp47_key) == 0) {
// https://www.unicode.org/repos/cldr/tags/latest/common/bcp47/collation.xml
std::set<std::string> valid_values = {"true", "false"};
is_valid_value = valid_values.find(bcp47_value) != valid_values.end();
} else if (strcmp("kf", bcp47_key) == 0) {
// https://www.unicode.org/repos/cldr/tags/latest/common/bcp47/collation.xml
std::set<std::string> valid_values = {"upper", "lower", "false"};
is_valid_value = valid_values.find(bcp47_value) != valid_values.end();
} else if (strcmp("nu", bcp47_key) == 0) {
is_valid_value = IsValidNumberingSystem(bcp47_value);
}
if (is_valid_value) {
extensions.insert(
std::pair<std::string, std::string>(bcp47_key, bcp47_value));
continue;
}
}
status = U_ZERO_ERROR;
icu_locale->setUnicodeKeywordValue(
bcp47_key == nullptr ? keyword : bcp47_key, 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);
std::string canonicalized_locale = Intl::ToLanguageTag(icu_locale).FromJust();
// 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) {
text = String::Flatten(isolate, text);
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(TimeZoneDetection::kSkip); }
~ICUTimezoneCache() override { Clear(TimeZoneDetection::kSkip); }
const char* LocalTimezone(double time_ms) override;
double DaylightSavingsOffset(double time_ms) override;
double LocalTimeOffset(double time_ms, bool is_utc) override;
void Clear(TimeZoneDetection time_zone_detection) 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(TimeZoneDetection time_zone_detection) {
delete timezone_;
timezone_ = nullptr;
timezone_name_.clear();
dst_timezone_name_.clear();
if (time_zone_detection == TimeZoneDetection::kRedetect) {
icu::TimeZone::adoptDefault(icu::TimeZone::detectHostTimeZone());
}
}
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);
}
Maybe<bool> Intl::GetNumberingSystem(Isolate* isolate,
Handle<JSReceiver> options,
const char* method,
std::unique_ptr<char[]>* result) {
const std::vector<const char*> empty_values = {};
Maybe<bool> maybe = Intl::GetStringOption(isolate, options, "numberingSystem",
empty_values, method, result);
MAYBE_RETURN(maybe, Nothing<bool>());
if (maybe.FromJust() && *result != nullptr) {
if (!IsValidNumberingSystem(result->get())) {
THROW_NEW_ERROR_RETURN_VALUE(
isolate,
NewRangeError(
MessageTemplate::kInvalid,
isolate->factory()->numberingSystem_string(),
isolate->factory()->NewStringFromAsciiChecked(result->get())),
Nothing<bool>());
}
return Just(true);
}
return Just(false);
}
Intl::HourCycle Intl::ToHourCycle(const std::string& hc) {
if (hc == "h11") return Intl::HourCycle::kH11;
if (hc == "h12") return Intl::HourCycle::kH12;
if (hc == "h23") return Intl::HourCycle::kH23;
if (hc == "h24") return Intl::HourCycle::kH24;
return Intl::HourCycle::kUndefined;
}
const std::set<std::string>& Intl::GetAvailableLocalesForLocale() {
static base::LazyInstance<Intl::AvailableLocales<icu::Locale>>::type
available_locales = LAZY_INSTANCE_INITIALIZER;
return available_locales.Pointer()->Get();
}
const std::set<std::string>& Intl::GetAvailableLocalesForDateFormat() {
static base::LazyInstance<Intl::AvailableLocales<icu::DateFormat>>::type
available_locales = LAZY_INSTANCE_INITIALIZER;
return available_locales.Pointer()->Get();
}
Handle<String> Intl::NumberFieldToType(Isolate* isolate,
Handle<Object> numeric_obj,
int32_t field_id) {
DCHECK(numeric_obj->IsNumeric());
switch (static_cast<UNumberFormatFields>(field_id)) {
case UNUM_INTEGER_FIELD:
if (numeric_obj->IsBigInt()) {
// Neither NaN nor Infinite could be stored into BigInt
// so just return integer.
return isolate->factory()->integer_string();
} else {
double number = numeric_obj->Number();
if (std::isfinite(number)) return isolate->factory()->integer_string();
if (std::isnan(number)) return isolate->factory()->nan_string();
return isolate->factory()->infinity_string();
}
case UNUM_FRACTION_FIELD:
return isolate->factory()->fraction_string();
case UNUM_DECIMAL_SEPARATOR_FIELD:
return isolate->factory()->decimal_string();
case UNUM_GROUPING_SEPARATOR_FIELD:
return isolate->factory()->group_string();
case UNUM_CURRENCY_FIELD:
return isolate->factory()->currency_string();
case UNUM_PERCENT_FIELD:
return isolate->factory()->percentSign_string();
case UNUM_SIGN_FIELD:
if (numeric_obj->IsBigInt()) {
Handle<BigInt> big_int = Handle<BigInt>::cast(numeric_obj);
return big_int->IsNegative() ? isolate->factory()->minusSign_string()
: isolate->factory()->plusSign_string();
} else {
double number = numeric_obj->Number();
return number < 0 ? isolate->factory()->minusSign_string()
: isolate->factory()->plusSign_string();
}
case UNUM_EXPONENT_SYMBOL_FIELD:
case UNUM_EXPONENT_SIGN_FIELD:
case UNUM_EXPONENT_FIELD:
// We should never get these because we're not using any scientific
// formatter.
UNREACHABLE();
return Handle<String>();
case UNUM_PERMILL_FIELD:
// We're not creating any permill formatter, and it's not even clear how
// that would be possible with the ICU API.
UNREACHABLE();
return Handle<String>();
case UNUM_COMPACT_FIELD:
return isolate->factory()->compact_string();
case UNUM_MEASURE_UNIT_FIELD:
return isolate->factory()->unit_string();
default:
UNREACHABLE();
return Handle<String>();
}
}
// A helper function to convert the FormattedValue for several Intl objects.
MaybeHandle<String> Intl::FormattedToString(
Isolate* isolate, const icu::FormattedValue& formatted) {
UErrorCode status = U_ZERO_ERROR;
icu::UnicodeString result = formatted.toString(status);
if (U_FAILURE(status)) {
THROW_NEW_ERROR(isolate, NewTypeError(MessageTemplate::kIcuError), String);
}
return Intl::ToString(isolate, result);
}
} // namespace internal
} // namespace v8