Revert of [builtins] Refactor the remaining Date builtins.

src/runtime/runtime-date.cc

Index: src/runtime/runtime-date.cc
diff --git a/src/runtime/runtime-date.cc b/src/runtime/runtime-date.cc
index 96292ad1c5fb50fbab87ab530d15923c070bf6a5..8d9bd70dfb1e1f783a0977fd41b095e361e690d9 100644
--- a/src/runtime/runtime-date.cc
+++ b/src/runtime/runtime-date.cc
@@ -14,6 +14,52 @@
 namespace v8 {
 namespace internal {
 
+RUNTIME_FUNCTION(Runtime_DateMakeDay) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 2);
+
+  CONVERT_SMI_ARG_CHECKED(year, 0);
+  CONVERT_SMI_ARG_CHECKED(month, 1);
+
+  int days = isolate->date_cache()->DaysFromYearMonth(year, month);
+  RUNTIME_ASSERT(Smi::IsValid(days));
+  return Smi::FromInt(days);
+}
+
+
+RUNTIME_FUNCTION(Runtime_DateSetValue) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 3);
+
+  CONVERT_ARG_HANDLE_CHECKED(JSDate, date, 0);
+  CONVERT_DOUBLE_ARG_CHECKED(time, 1);
+  CONVERT_SMI_ARG_CHECKED(is_utc, 2);
+
+  DateCache* date_cache = isolate->date_cache();
+
+  Handle<Object> value;
+  bool is_value_nan = false;
+  if (std::isnan(time)) {
+    value = isolate->factory()->nan_value();
+    is_value_nan = true;
+  } else if (!is_utc && (time < -DateCache::kMaxTimeBeforeUTCInMs ||
+                         time > DateCache::kMaxTimeBeforeUTCInMs)) {
+    value = isolate->factory()->nan_value();
+    is_value_nan = true;
+  } else {
+    time = is_utc ? time : date_cache->ToUTC(static_cast<int64_t>(time));
+    if (time < -DateCache::kMaxTimeInMs || time > DateCache::kMaxTimeInMs) {
+      value = isolate->factory()->nan_value();
+      is_value_nan = true;
+    } else {
+      value = isolate->factory()->NewNumber(DoubleToInteger(time));
+    }
+  }
+  date->SetValue(*value, is_value_nan);
+  return *value;
+}
+
+
 RUNTIME_FUNCTION(Runtime_IsDate) {
   SealHandleScope shs(isolate);
   DCHECK_EQ(1, args.length());
@@ -24,7 +70,7 @@
 
 RUNTIME_FUNCTION(Runtime_ThrowNotDateError) {
   HandleScope scope(isolate);
-  DCHECK_EQ(0, args.length());
+  DCHECK(args.length() == 0);
   THROW_NEW_ERROR_RETURN_FAILURE(isolate,
                                  NewTypeError(MessageTemplate::kNotDateObject));
 }
@@ -36,5 +82,53 @@
   return *isolate->factory()->NewNumber(JSDate::CurrentTimeValue(isolate));
 }
 
+
+RUNTIME_FUNCTION(Runtime_DateLocalTimezone) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+
+  CONVERT_DOUBLE_ARG_CHECKED(x, 0);
+  RUNTIME_ASSERT(x >= -DateCache::kMaxTimeBeforeUTCInMs &&
+                 x <= DateCache::kMaxTimeBeforeUTCInMs);
+  const char* zone =
+      isolate->date_cache()->LocalTimezone(static_cast<int64_t>(x));
+  Handle<String> result =
+      isolate->factory()->NewStringFromUtf8(CStrVector(zone)).ToHandleChecked();
+  return *result;
+}
+
+
+RUNTIME_FUNCTION(Runtime_DateCacheVersion) {
+  HandleScope hs(isolate);
+  DCHECK(args.length() == 0);
+  if (isolate->serializer_enabled()) return isolate->heap()->undefined_value();
+  if (!isolate->eternal_handles()->Exists(EternalHandles::DATE_CACHE_VERSION)) {
+    Handle<FixedArray> date_cache_version =
+        isolate->factory()->NewFixedArray(1, TENURED);
+    date_cache_version->set(0, Smi::FromInt(0));
+    isolate->eternal_handles()->CreateSingleton(
+        isolate, *date_cache_version, EternalHandles::DATE_CACHE_VERSION);
+  }
+  Handle<FixedArray> date_cache_version =
+      Handle<FixedArray>::cast(isolate->eternal_handles()->GetSingleton(
+          EternalHandles::DATE_CACHE_VERSION));
+  // Return result as a JS array.
+  Handle<JSObject> result =
+      isolate->factory()->NewJSObject(isolate->array_function());
+  JSArray::SetContent(Handle<JSArray>::cast(result), date_cache_version);
+  return *result;
+}
+
+
+RUNTIME_FUNCTION(Runtime_DateField) {
+  SealHandleScope shs(isolate);
+  DCHECK_EQ(2, args.length());
+  CONVERT_ARG_CHECKED(JSDate, date, 0);
+  CONVERT_SMI_ARG_CHECKED(index, 1);
+  DCHECK_LE(0, index);
+  if (index == 0) return date->value();
+  return JSDate::GetField(date, Smi::FromInt(index));
+}
+
 }  // namespace internal
 }  // namespace v8