Move the contents of api-natives.js to c++

src/apinatives.js

-// Copyright 2006-2008 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.
-
-"use strict";
-
-// This file contains infrastructure used by the API.  See
-// v8natives.js for an explanation of these files are processed and
-// loaded.
-
-
-function CreateDate(time) {
-  var date = new $Date();
-  date.setTime(time);
-  return date;
-}
-
-
-var kApiFunctionCache = new InternalArray();
-var functionCache = kApiFunctionCache;
-
-
-function Instantiate(data, name) {
-  if (!%IsTemplate(data)) return data;
-  var tag = %GetTemplateField(data, kApiTagOffset);
-  switch (tag) {
-    case kFunctionTag:
-      return InstantiateFunction(data, name);
-    case kNewObjectTag:
-      var Constructor = %GetTemplateField(data, kApiConstructorOffset);
-      // Note: Do not directly use a function template as a condition, our
-      // internal ToBoolean doesn't handle that!
-      var result;
-      if (typeof Constructor === 'undefined') {
-        result = {};
-        ConfigureTemplateInstance(result, data);
-      } else {
-        // ConfigureTemplateInstance is implicitly called before calling the API
-        // constructor in HandleApiCall.
-        result = new (Instantiate(Constructor))();
-        result = %ToFastProperties(result);
-      }
-      return result;
-    default:
-      throw 'Unknown API tag <' + tag + '>';
-  }
-}
-
-
-function InstantiateFunction(data, name) {
-  // We need a reference to kApiFunctionCache in the stack frame
-  // if we need to bail out from a stack overflow.
-  var cache = kApiFunctionCache;
-  var serialNumber = %GetTemplateField(data, kApiSerialNumberOffset);
-  var isFunctionCached =
-   (serialNumber in cache) && (cache[serialNumber] != kUninitialized);
-  if (!isFunctionCached) {
-    try {
-      var flags = %GetTemplateField(data, kApiFlagOffset);
-      var prototype;
-      if (!(flags & (1 << kRemovePrototypeBit))) {
-        var template = %GetTemplateField(data, kApiPrototypeTemplateOffset);
-        prototype = typeof template === 'undefined'
-            ?  {} : Instantiate(template);
-
-        var parent = %GetTemplateField(data, kApiParentTemplateOffset);
-        // Note: Do not directly use a function template as a condition, our
-        // internal ToBoolean doesn't handle that!
-        if (typeof parent !== 'undefined') {
-          var parent_fun = Instantiate(parent);
-          %InternalSetPrototype(prototype, parent_fun.prototype);
-        }
-      }
-      var fun = %CreateApiFunction(data, prototype);
-      if (IS_STRING(name)) %FunctionSetName(fun, name);
-      var doNotCache = flags & (1 << kDoNotCacheBit);
-      if (!doNotCache) cache[serialNumber] = fun;
-      ConfigureTemplateInstance(fun, data);
-      if (doNotCache) return fun;
-    } catch (e) {
-      cache[serialNumber] = kUninitialized;
-      throw e;
-    }
-  }
-  return cache[serialNumber];
-}
-
-
-function ConfigureTemplateInstance(obj, data) {
-  var properties = %GetTemplateField(data, kApiPropertyListOffset);
-  if (!properties) return;
-  // Disable access checks while instantiating the object.
-  var requires_access_checks = %DisableAccessChecks(obj);
-  try {
-    for (var i = 1; i < properties[0];) {
-      var length = properties[i];
-      if (length == 3) {
-        var name = properties[i + 1];
-        var prop_data = properties[i + 2];
-        var attributes = properties[i + 3];
-        var value = Instantiate(prop_data, name);
-        %AddPropertyForTemplate(obj, name, value, attributes);
-      } else if (length == 4 || length == 5) {
-        // TODO(verwaest): The 5th value used to be access_control. Remove once
-        // the bindings are updated.
-        var name = properties[i + 1];
-        var getter = properties[i + 2];
-        var setter = properties[i + 3];
-        var attribute = properties[i + 4];
-        %DefineApiAccessorProperty(obj, name, getter, setter, attribute);
-      } else {
-        throw "Bad properties array";
-      }
-      i += length + 1;
-    }
-  } finally {
-    if (requires_access_checks) %EnableAccessChecks(obj);
-  }
-}