First cut at API for native Typed Arrays.

src/api.h

Index: src/api.h
diff --git a/src/api.h b/src/api.h
index f62541dc032cfb4f0ce03659b1a231e199dd2874..a9563469fd1899cd86e2e70b4eb2b84b8f26f510 100644
--- a/src/api.h
+++ b/src/api.h
@@ -171,6 +171,15 @@ class RegisteredExtension {
   V(Object, JSObject)                          \
   V(Array, JSArray)                            \
   V(ArrayBuffer, JSArrayBuffer)                \
+  V(TypedArray, JSTypedArray)                  \
+  V(Uint8Array, JSTypedArray)                  \
+  V(Int8Array, JSTypedArray)                   \
+  V(Uint16Array, JSTypedArray)                 \
+  V(Int16Array, JSTypedArray)                  \
+  V(Uint32Array, JSTypedArray)                 \
+  V(Int32Array, JSTypedArray)                  \
+  V(Float32Array, JSTypedArray)                \
+  V(Float64Array, JSTypedArray)                \
   V(String, String)                            \
   V(Symbol, Symbol)                            \
   V(Script, Object)                            \
@@ -208,6 +217,26 @@ class Utils {
       v8::internal::Handle<v8::internal::JSArray> obj);
   static inline Local<ArrayBuffer> ToLocal(
       v8::internal::Handle<v8::internal::JSArrayBuffer> obj);
+
+  static inline Local<TypedArray> ToLocal(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Uint8Array> ToLocalUint8Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Int8Array> ToLocalInt8Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Uint16Array> ToLocalUint16Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Int16Array> ToLocalInt16Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Uint32Array> ToLocalUint32Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Int32Array> ToLocalInt32Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Float32Array> ToLocalFloat32Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Float64Array> ToLocalFloat64Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+
   static inline Local<Message> MessageToLocal(
       v8::internal::Handle<v8::internal::Object> obj);
   static inline Local<StackTrace> StackTraceToLocal(
@@ -270,6 +299,17 @@ v8::internal::Handle<T> v8::internal::Handle<T>::EscapeFrom(
     return Local<To>(reinterpret_cast<To*>(obj.location()));                \
   }
 
+
+#define MAKE_TO_LOCAL_TYPED_ARRAY(TypedArray, typeConst)                    \
+  Local<v8::TypedArray> Utils::ToLocal##TypedArray(                         \
+      v8::internal::Handle<v8::internal::JSTypedArray> obj) {               \
+    ASSERT(obj.is_null() || !obj->IsTheHole());                             \
+    ASSERT(obj->type() == typeConst);                                       \
+    return Local<v8::TypedArray>(                                           \
+        reinterpret_cast<v8::TypedArray*>(obj.location()));                 \
+  }
+
+
 MAKE_TO_LOCAL(ToLocal, Context, Context)
 MAKE_TO_LOCAL(ToLocal, Object, Value)
 MAKE_TO_LOCAL(ToLocal, JSFunction, Function)
@@ -279,6 +319,17 @@ MAKE_TO_LOCAL(ToLocal, JSRegExp, RegExp)
 MAKE_TO_LOCAL(ToLocal, JSObject, Object)
 MAKE_TO_LOCAL(ToLocal, JSArray, Array)
 MAKE_TO_LOCAL(ToLocal, JSArrayBuffer, ArrayBuffer)
+MAKE_TO_LOCAL(ToLocal, JSTypedArray, TypedArray)
+
+MAKE_TO_LOCAL_TYPED_ARRAY(Uint8Array, kExternalUnsignedByteArray)
+MAKE_TO_LOCAL_TYPED_ARRAY(Int8Array, kExternalByteArray)
+MAKE_TO_LOCAL_TYPED_ARRAY(Uint16Array, kExternalUnsignedShortArray)
+MAKE_TO_LOCAL_TYPED_ARRAY(Int16Array, kExternalShortArray)
+MAKE_TO_LOCAL_TYPED_ARRAY(Uint32Array, kExternalUnsignedIntArray)
+MAKE_TO_LOCAL_TYPED_ARRAY(Int32Array, kExternalIntArray)
+MAKE_TO_LOCAL_TYPED_ARRAY(Float32Array, kExternalFloatArray)
+MAKE_TO_LOCAL_TYPED_ARRAY(Float64Array, kExternalDoubleArray)
+
 MAKE_TO_LOCAL(ToLocal, FunctionTemplateInfo, FunctionTemplate)
 MAKE_TO_LOCAL(ToLocal, ObjectTemplateInfo, ObjectTemplate)
 MAKE_TO_LOCAL(ToLocal, SignatureInfo, Signature)
@@ -293,6 +344,7 @@ MAKE_TO_LOCAL(Uint32ToLocal, Object, Uint32)
 MAKE_TO_LOCAL(ExternalToLocal, JSObject, External)
 MAKE_TO_LOCAL(ToLocal, DeclaredAccessorDescriptor, DeclaredAccessorDescriptor)
 
+#undef MAKE_TO_LOCAL_TYPED_ARRAY
 #undef MAKE_TO_LOCAL