[Intl] move the logic of formatDate into C++

Spin off cl from +/1155271

Bug: v8:7961
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ibf4bfdcea5ba391281a7d57ffa23d6a96c6ce6a1
Reviewed-on: https://chromium-review.googlesource.com/1164528Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55144}

src/js/intl.js

@@ -1345,14 +1345,7 @@ DEFINE_METHOD(
  * DateTimeFormat.
  */
 function formatDate(formatter, dateValue) {
-  var dateMs;
-  if (IS_UNDEFINED(dateValue)) {
-    dateMs = %DateCurrentTime();
-  } else {
-    dateMs = TO_NUMBER(dateValue);
-  }
-
-  return %InternalDateFormat(formatter, dateMs);
+  return %FormatDate(formatter, dateValue);
 }
 
 // Length is 1 as specified in ECMA 402 v2+
@@ -1630,7 +1623,7 @@ function toLocaleDateTime(date, locales, options, required, defaults, service) {
   var dateFormat =
       cachedOrNewService(service, locales, options, internalOptions);
 
-  return formatDate(dateFormat, date);
+  return %FormatDate(dateFormat, date);
 }
 
 

src/objects/intl-objects.cc

@@ -620,6 +620,42 @@ void DateFormat::DeleteDateFormat(const v8::WeakCallbackInfo<void>& data) {
   GlobalHandles::Destroy(reinterpret_cast<Object**>(data.GetParameter()));
 }
 
+MaybeHandle<String> DateFormat::FormatDate(Isolate* isolate,
+                                           Handle<JSObject> date_format_holder,
+                                           Handle<Object> date) {
+  // 3. If date is not provided or is undefined, then
+  double x;
+  if (date->IsUndefined()) {
+    // 3.a Let x be Call(%Date_now%, undefined).
+    x = JSDate::CurrentTimeValue(isolate);
+  } else {
+    // 4. Else,
+    //    a. Let x be ? ToNumber(date).
+    ASSIGN_RETURN_ON_EXCEPTION(isolate, date, Object::ToNumber(isolate, date),
+                               String);
+    CHECK(date->IsNumber());
+    x = date->Number();
+  }
+
+  double date_value = DateCache::TimeClip(x);
+  if (std::isnan(date_value)) {
+    THROW_NEW_ERROR(isolate, NewRangeError(MessageTemplate::kInvalidTimeValue),
+                    String);
+  }
+
+  CHECK(Intl::IsObjectOfType(isolate, date_format_holder,
+                             Intl::Type::kDateTimeFormat));
+  icu::SimpleDateFormat* date_format =
+      DateFormat::UnpackDateFormat(date_format_holder);
+  CHECK_NOT_NULL(date_format);
+
+  icu::UnicodeString result;
+  date_format->format(date_value, result);
+
+  return isolate->factory()->NewStringFromTwoByte(Vector<const uint16_t>(
+      reinterpret_cast<const uint16_t*>(result.getBuffer()), result.length()));
+}
+
 icu::DecimalFormat* NumberFormat::InitializeNumberFormat(
     Isolate* isolate, Handle<String> locale, Handle<JSObject> options,
     Handle<JSObject> resolved) {

src/objects/intl-objects.h

@@ -49,6 +49,11 @@ class DateFormat {
   // holds the pointer gets garbage collected.
   static void DeleteDateFormat(const v8::WeakCallbackInfo<void>& data);
 
+  // ecma402/#sec-datetime-format-functions
+  V8_WARN_UNUSED_RESULT static MaybeHandle<String> FormatDate(
+      Isolate* isolate, Handle<JSObject> date_format_holder,
+      Handle<Object> date);
+
   // Layout description.
   static const int kSimpleDateFormat = JSObject::kHeaderSize;
   static const int kSize = kSimpleDateFormat + kPointerSize;

src/runtime/runtime-intl.cc

@@ -228,31 +228,16 @@ RUNTIME_FUNCTION(Runtime_CreateDateTimeFormat) {
   return *local_object;
 }
 
-RUNTIME_FUNCTION(Runtime_InternalDateFormat) {
+RUNTIME_FUNCTION(Runtime_FormatDate) {
   HandleScope scope(isolate);
 
   DCHECK_EQ(2, args.length());
 
   CONVERT_ARG_HANDLE_CHECKED(JSObject, date_format_holder, 0);
-  CONVERT_NUMBER_ARG_HANDLE_CHECKED(date, 1);
-
-  double date_value = DateCache::TimeClip(date->Number());
-  if (std::isnan(date_value)) {
-    THROW_NEW_ERROR_RETURN_FAILURE(
-        isolate, NewRangeError(MessageTemplate::kInvalidTimeValue));
-  }
-
-  icu::SimpleDateFormat* date_format =
-      DateFormat::UnpackDateFormat(date_format_holder);
-  CHECK_NOT_NULL(date_format);
-
-  icu::UnicodeString result;
-  date_format->format(date_value, result);
+  CONVERT_ARG_HANDLE_CHECKED(Object, date, 1);
 
   RETURN_RESULT_OR_FAILURE(
-      isolate, isolate->factory()->NewStringFromTwoByte(Vector<const uint16_t>(
-                   reinterpret_cast<const uint16_t*>(result.getBuffer()),
-                   result.length())));
+      isolate, DateFormat::FormatDate(isolate, date_format_holder, date));
 }
 
 RUNTIME_FUNCTION(Runtime_CreateNumberFormat) {

src/runtime/runtime.h

@@ -213,15 +213,15 @@ namespace internal {
   F(CreateBreakIterator, 3, 1)               \
   F(CreateDateTimeFormat, 3, 1)              \
   F(CreateNumberFormat, 3, 1)                \
-  F(DefineWEProperty, 3, 1)                  \
   F(CurrencyDigits, 1, 1)                    \
   F(DateCacheVersion, 0, 1)                  \
   F(DefaultNumberOption, 5, 1)               \
+  F(DefineWEProperty, 3, 1)                  \
   F(FormatList, 2, 1)                        \
   F(FormatListToParts, 2, 1)                 \
+  F(FormatDate, 2, 1)                        \
   F(GetDefaultICULocale, 0, 1)               \
   F(GetNumberOption, 5, 1)                   \
-  F(InternalDateFormat, 2, 1)                \
   F(IntlUnwrapReceiver, 5, 1)                \
   F(IsInitializedIntlObjectOfType, 2, 1)     \
   F(IsWellFormedCurrencyCode, 1, 1)          \