diff -r 000000000000 -r 6474c204b198 xpcom/io/nsBinaryStream.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/io/nsBinaryStream.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,90 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * 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 nsBinaryStream_h___
+#define nsBinaryStream_h___
+
+#include "nsCOMPtr.h"
+#include "nsAString.h"
+#include "nsIObjectInputStream.h"
+#include "nsIObjectOutputStream.h"
+#include "nsIStreamBufferAccess.h"
+
+#define NS_BINARYOUTPUTSTREAM_CID        \
+{ /* 86c37b9a-74e7-4672-844e-6e7dd83ba484 */         \
+     0x86c37b9a,                                     \
+     0x74e7,                                         \
+     0x4672,                                         \
+    {0x84, 0x4e, 0x6e, 0x7d, 0xd8, 0x3b, 0xa4, 0x84} \
+}
+
+#define NS_BINARYOUTPUTSTREAM_CONTRACTID "@mozilla.org/binaryoutputstream;1"
+
+// Derive from nsIObjectOutputStream so this class can be used as a superclass
+// by nsObjectOutputStream.
+class nsBinaryOutputStream : public nsIObjectOutputStream
+{
+public:
+    nsBinaryOutputStream() {}
+    // virtual dtor since subclasses call our Release()
+    virtual ~nsBinaryOutputStream() {}
+
+protected:
+    // nsISupports methods
+    NS_DECL_ISUPPORTS
+
+    // nsIOutputStream methods
+    NS_DECL_NSIOUTPUTSTREAM
+
+    // nsIBinaryOutputStream methods
+    NS_DECL_NSIBINARYOUTPUTSTREAM
+
+    // nsIObjectOutputStream methods
+    NS_DECL_NSIOBJECTOUTPUTSTREAM
+
+    // Call Write(), ensuring that all proffered data is written
+    nsresult WriteFully(const char *aBuf, uint32_t aCount);
+
+    nsCOMPtr<nsIOutputStream>       mOutputStream;
+    nsCOMPtr<nsIStreamBufferAccess> mBufferAccess;
+};
+
+#define NS_BINARYINPUTSTREAM_CID        \
+{ /* c521a612-2aad-46db-b6ab-3b821fb150b1 */         \
+     0xc521a612,                                     \
+     0x2aad,                                         \
+     0x46db,                                         \
+    {0xb6, 0xab, 0x3b, 0x82, 0x1f, 0xb1, 0x50, 0xb1} \
+}
+
+#define NS_BINARYINPUTSTREAM_CONTRACTID "@mozilla.org/binaryinputstream;1"
+
+// Derive from nsIObjectInputStream so this class can be used as a superclass
+// by nsObjectInputStream.
+class nsBinaryInputStream : public nsIObjectInputStream
+{
+public:
+    nsBinaryInputStream() {}
+    // virtual dtor since subclasses call our Release()
+    virtual ~nsBinaryInputStream() {}
+
+protected:
+    // nsISupports methods
+    NS_DECL_ISUPPORTS
+
+    // nsIInputStream methods
+    NS_DECL_NSIINPUTSTREAM
+
+    // nsIBinaryInputStream methods
+    NS_DECL_NSIBINARYINPUTSTREAM
+
+    // nsIObjectInputStream methods
+    NS_DECL_NSIOBJECTINPUTSTREAM
+
+    nsCOMPtr<nsIInputStream>        mInputStream;
+    nsCOMPtr<nsIStreamBufferAccess> mBufferAccess;
+};
+
+#endif // nsBinaryStream_h___