1 files changed, 91 insertions, 0 deletions
diff --git a/dom/streams/ReadableStreamBYOBReader.h b/dom/streams/ReadableStreamBYOBReader.h
new file mode 100644
index 0000000000..896f1acbf9
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+++ b/dom/streams/ReadableStreamBYOBReader.h
@@ -0,0 +1,91 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/. */
+
+#ifndef mozilla_dom_ReadableStreamBYOBReader_h
+#define mozilla_dom_ReadableStreamBYOBReader_h
+
+#include "js/TypeDecls.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/dom/ReadableStreamGenericReader.h"
+#include "mozilla/dom/TypedArray.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsWrapperCache.h"
+#include "mozilla/LinkedList.h"
+
+namespace mozilla::dom {
+
+class Promise;
+struct ReadIntoRequest;
+class ReadableStream;
+
+}  // namespace mozilla::dom
+
+namespace mozilla::dom {
+
+class ReadableStreamBYOBReader final : public ReadableStreamGenericReader,
+                                       public nsWrapperCache {
+ public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS_INHERITED(
+      ReadableStreamBYOBReader, ReadableStreamGenericReader)
+
+ public:
+  explicit ReadableStreamBYOBReader(nsISupports* aGlobal);
+
+  bool IsDefault() override { return false; };
+  bool IsBYOB() override { return true; }
+  ReadableStreamDefaultReader* AsDefault() override {
+    MOZ_CRASH("Should have verified IsDefault first");
+    return nullptr;
+  }
+  ReadableStreamBYOBReader* AsBYOB() override { return this; }
+
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+  static already_AddRefed<ReadableStreamBYOBReader> Constructor(
+      const GlobalObject& global, ReadableStream& stream, ErrorResult& rv);
+
+  MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> Read(
+      const ArrayBufferView& aArray, ErrorResult& rv);
+
+  void ReleaseLock(ErrorResult& rv);
+
+  LinkedList<RefPtr<ReadIntoRequest>>& ReadIntoRequests() {
+    return mReadIntoRequests;
+  }
+
+ private:
+  ~ReadableStreamBYOBReader() override = default;
+
+  LinkedList<RefPtr<ReadIntoRequest>> mReadIntoRequests;
+};
+
+namespace streams_abstract {
+
+already_AddRefed<ReadableStreamBYOBReader> AcquireReadableStreamBYOBReader(
+    ReadableStream* aStream, ErrorResult& aRv);
+
+MOZ_CAN_RUN_SCRIPT void ReadableStreamBYOBReaderRead(
+    JSContext* aCx, ReadableStreamBYOBReader* aReader,
+    JS::Handle<JSObject*> aView, ReadIntoRequest* aReadIntoRequest,
+    ErrorResult& aRv);
+
+void ReadableStreamBYOBReaderErrorReadIntoRequests(
+    JSContext* aCx, ReadableStreamBYOBReader* aReader,
+    JS::Handle<JS::Value> aError, ErrorResult& aRv);
+
+void ReadableStreamBYOBReaderRelease(JSContext* aCx,
+                                     ReadableStreamBYOBReader* aReader,
+                                     ErrorResult& aRv);
+
+}  // namespace streams_abstract
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_ReadableStreamBYOBReader_h