1 files changed, 26 insertions, 0 deletions
diff --git a/js/fbs_util.ts b/js/fbs_util.ts
new file mode 100644
index 000000000..fd953ac88
--- /dev/null
+++ b/js/fbs_util.ts
@@ -0,0 +1,26 @@
+// Copyright 2018 the Deno authors. All rights reserved. MIT license.
+import { libdeno } from "./libdeno";
+import { flatbuffers } from "flatbuffers";
+import { maybeThrowError } from "./errors";
+import { deno as fbs } from "gen/msg_generated";
+
+export function send(
+  builder: flatbuffers.Builder,
+  msgType: fbs.Any,
+  msg: flatbuffers.Offset
+): null | fbs.Base {
+  fbs.Base.startBase(builder);
+  fbs.Base.addMsg(builder, msg);
+  fbs.Base.addMsgType(builder, msgType);
+  builder.finish(fbs.Base.endBase(builder));
+
+  const resBuf = libdeno.send(builder.asUint8Array());
+  if (resBuf == null) {
+    return null;
+  } else {
+    const bb = new flatbuffers.ByteBuffer(new Uint8Array(resBuf!));
+    const baseRes = fbs.Base.getRootAsBase(bb);
+    maybeThrowError(baseRes);
+    return baseRes;
+  }
+}