Add C++ API for constructing fast buffer from string

src/node_buffer.cc

@@ -82,6 +82,22 @@ static size_t ByteLength (Handle<String> string, enum encoding enc) {
 }
 
 
+Handle<Object> Buffer::New(Handle<String> string) {
+  HandleScope scope;
+
+  // get Buffer from global scope.
+  Local<Object> global = v8::Context::GetCurrent()->Global();
+  Local<Value> bv = global->Get(String::NewSymbol("Buffer"));
+  assert(bv->IsFunction());
+  Local<Function> b = Local<Function>::Cast(bv);
+
+  Local<Value> argv[1] = { Local<Value>::New(string) };
+  Local<Object> instance = b->NewInstance(1, argv);
+
+  return scope.Close(instance);
+}
+
+
 Buffer* Buffer::New(size_t length) {
   HandleScope scope;
 

src/node_buffer.h

@@ -24,6 +24,9 @@ class Buffer : public ObjectWrap {
 
   typedef void (*free_callback)(char *data, void *hint);
 
+  // C++ API for constructing fast buffer
+  static v8::Handle<v8::Object> New(v8::Handle<v8::String> string);
+
   static void Initialize(v8::Handle<v8::Object> target);
   static Buffer* New(size_t length); // public constructor
   static Buffer* New(char *data, size_t len); // public constructor