mozjs_sys 0.67.1

System crate for the Mozilla SpiderMonkey JavaScript engine.
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=8 sts=2 et sw=2 tw=80:
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef vm_ReceiverGuard_inl_h
#define vm_ReceiverGuard_inl_h

#include "vm/ReceiverGuard.h"

#include "builtin/TypedObject.h"
#include "vm/JSObject.h"
#include "vm/ShapedObject.h"
#include "vm/UnboxedObject.h"

namespace js {

MOZ_ALWAYS_INLINE
ReceiverGuard::ReceiverGuard(JSObject* obj) : group(nullptr), shape(nullptr) {
  if (!obj->isNative()) {
    if (obj->is<UnboxedPlainObject>()) {
      group = obj->group();
      if (UnboxedExpandoObject* expando =
              obj->as<UnboxedPlainObject>().maybeExpando()) {
        shape = expando->lastProperty();
      }
      return;
    }
    if (obj->is<TypedObject>()) {
      group = obj->group();
      return;
    }
  }
  shape = obj->as<ShapedObject>().shape();
}

MOZ_ALWAYS_INLINE
ReceiverGuard::ReceiverGuard(ObjectGroup* group, Shape* shape)
    : group(group), shape(shape) {
  if (group) {
    const Class* clasp = group->clasp();
    if (clasp == &UnboxedPlainObject::class_) {
      // Keep both group and shape.
    } else if (IsTypedObjectClass(clasp)) {
      this->shape = nullptr;
    } else {
      this->group = nullptr;
    }
  }
}

}  // namespace js

#endif /* vm_ReceiverGuard_inl_h */