1 files changed, 64 insertions, 0 deletions
diff --git a/dom/push/PushUtil.cpp b/dom/push/PushUtil.cpp
new file mode 100644
index 0000000000..408b62048d
--- /dev/null
+++ b/dom/push/PushUtil.cpp
@@ -0,0 +1,64 @@
+/* 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/. */
+
+#include "mozilla/dom/PushUtil.h"
+
+namespace mozilla {
+namespace dom {
+
+/* static */ bool
+PushUtil::CopyArrayBufferToArray(const ArrayBuffer& aBuffer,
+                                 nsTArray<uint8_t>& aArray)
+{
+  MOZ_ASSERT(aArray.IsEmpty());
+  aBuffer.ComputeLengthAndData();
+  return aArray.SetCapacity(aBuffer.Length(), fallible) &&
+         aArray.InsertElementsAt(0, aBuffer.Data(), aBuffer.Length(), fallible);
+}
+
+/* static */ bool
+PushUtil::CopyArrayBufferViewToArray(const ArrayBufferView& aView,
+                                     nsTArray<uint8_t>& aArray)
+{
+  MOZ_ASSERT(aArray.IsEmpty());
+  aView.ComputeLengthAndData();
+  return aArray.SetCapacity(aView.Length(), fallible) &&
+         aArray.InsertElementsAt(0, aView.Data(), aView.Length(), fallible);
+}
+
+/* static */ bool
+PushUtil::CopyBufferSourceToArray(
+  const OwningArrayBufferViewOrArrayBuffer& aSource, nsTArray<uint8_t>& aArray)
+{
+  if (aSource.IsArrayBuffer()) {
+    return CopyArrayBufferToArray(aSource.GetAsArrayBuffer(), aArray);
+  }
+  if (aSource.IsArrayBufferView()) {
+    return CopyArrayBufferViewToArray(aSource.GetAsArrayBufferView(), aArray);
+  }
+  MOZ_CRASH("Uninitialized union: expected buffer or view");
+}
+
+/* static */ void
+PushUtil::CopyArrayToArrayBuffer(JSContext* aCx,
+                                 const nsTArray<uint8_t>& aArray,
+                                 JS::MutableHandle<JSObject*> aValue,
+                                 ErrorResult& aRv)
+{
+  if (aArray.IsEmpty()) {
+    aValue.set(nullptr);
+    return;
+  }
+  JS::Rooted<JSObject*> buffer(aCx, ArrayBuffer::Create(aCx,
+                                                        aArray.Length(),
+                                                        aArray.Elements()));
+  if (NS_WARN_IF(!buffer)) {
+    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+    return;
+  }
+  aValue.set(buffer);
+}
+
+} // namespace dom
+} // namespace mozilla