1 files changed, 29 insertions, 0 deletions
diff --git a/xpcom/io/StreamBufferSink.h b/xpcom/io/StreamBufferSink.h
new file mode 100644
index 0000000000..bf00527aea
--- /dev/null
+++ b/xpcom/io/StreamBufferSink.h
@@ -0,0 +1,29 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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_StreamBufferSink_h
+#define mozilla_StreamBufferSink_h
+
+#include <cstddef>
+#include "mozilla/Span.h"
+#include "nsString.h"
+
+namespace mozilla {
+
+class StreamBufferSink {
+ public:
+  virtual mozilla::Span<char> Data() = 0;
+
+  nsDependentCSubstring Slice(size_t aOffset) {
+    return nsDependentCSubstring(Data().First(aOffset));
+  }
+
+  virtual ~StreamBufferSink() = default;
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla_StreamBufferSink_h