ValueSerializer: Expose reading/writing doubles to embedder.

src/api.cc

 // Copyright 2012 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.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 2957 matching lines @@
 }
 
 void ValueSerializer::WriteUint32(uint32_t value) {
   private_->serializer.WriteUint32(value);
 }
 
 void ValueSerializer::WriteUint64(uint64_t value) {
   private_->serializer.WriteUint64(value);
 }
 
+void ValueSerializer::WriteDouble(double value) {
+  private_->serializer.WriteDouble(value);
+}
+
 void ValueSerializer::WriteRawBytes(const void* source, size_t length) {
   private_->serializer.WriteRawBytes(source, length);
 }
 
 MaybeLocal<Object> ValueDeserializer::Delegate::ReadHostObject(
     Isolate* v8_isolate) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
   isolate->ScheduleThrow(*isolate->factory()->NewError(
       isolate->error_function(),
       i::MessageTemplate::kDataCloneDeserializationError));
@@ skipping 104 matching lines @@
 }
 
 bool ValueDeserializer::ReadUint32(uint32_t* value) {
   return private_->deserializer.ReadUint32(value);
 }
 
 bool ValueDeserializer::ReadUint64(uint64_t* value) {
   return private_->deserializer.ReadUint64(value);
 }
 
+bool ValueDeserializer::ReadDouble(double* value) {
+  return private_->deserializer.ReadDouble(value);
+}
+
 bool ValueDeserializer::ReadRawBytes(size_t length, const void** data) {
   return private_->deserializer.ReadRawBytes(length, data);
 }
 
 // --- D a t a ---
 
 bool Value::FullIsUndefined() const {
   i::Handle<i::Object> object = Utils::OpenHandle(this);
   bool result = false;
   if (!object->IsSmi()) {
@@ skipping 6252 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8