C++ bindings

mojo/public/bindings/lib/bindings_internal.h

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_PUBLIC_BINDINGS_LIB_BINDINGS_INTERNAL_H_
+#define MOJO_PUBLIC_BINDINGS_LIB_BINDINGS_INTERNAL_H_
+
+#include <stdint.h>
+
+namespace mojo {
+template <typename T> class Array;
+
+namespace internal {
+
+struct StructHeader {
+  uint32_t num_bytes;
+  uint32_t num_fields;
+};
+
+struct ArrayHeader {
+  uint32_t num_bytes;
+  uint32_t num_elements;
+};
+
+template <typename T>
+union StructPointer {
+  uint64_t offset;
+  T* ptr;
+};
+
+template <typename T>
+union ArrayPointer {
+  uint64_t offset;
+  Array<T>* ptr;
+};
+
+union StringPointer {
+  uint64_t offset;
+  Array<char>* ptr;
+};
+
+template <typename T>
+struct ArrayTraits {
+  typedef T StorageType;
+
+  static T& ToRef(StorageType& e) { return e; }
+  static T const& ToConstRef(const StorageType& e) { return e; }
+};
+
+template <typename P>
+struct ArrayTraits<P*> {
+  typedef StructPointer<P> StorageType;
+
+  static P*& ToRef(StorageType& e) { return e.ptr; }
+  static P* const& ToConstRef(const StorageType& e) { return e.ptr; }
+};
+
+template <typename T> class ObjectTraits {};
+
+}  // namespace internal
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_BINDINGS_LIB_BINDINGS_INTERNAL_H_