diff -r 000000000000 -r 6474c204b198 dom/quota/FileStreams.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/quota/FileStreams.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,127 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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_dom_quota_filestreams_h__
+#define mozilla_dom_quota_filestreams_h__
+
+#include "QuotaCommon.h"
+
+#include "nsFileStreams.h"
+
+#include "PersistenceType.h"
+#include "QuotaObject.h"
+
+BEGIN_QUOTA_NAMESPACE
+
+template <class FileStreamBase>
+class FileQuotaStream : public FileStreamBase
+{
+public:
+  // nsFileStreamBase override
+  NS_IMETHOD
+  SetEOF() MOZ_OVERRIDE;
+
+  NS_IMETHOD
+  Close() MOZ_OVERRIDE;
+
+protected:
+  FileQuotaStream(PersistenceType aPersistenceType, const nsACString& aGroup,
+                  const nsACString& aOrigin)
+  : mPersistenceType(aPersistenceType), mGroup(aGroup), mOrigin(aOrigin)
+  { }
+
+  // nsFileStreamBase override
+  virtual nsresult
+  DoOpen() MOZ_OVERRIDE;
+
+  PersistenceType mPersistenceType;
+  nsCString mGroup;
+  nsCString mOrigin;
+  nsRefPtr<QuotaObject> mQuotaObject;
+};
+
+template <class FileStreamBase>
+class FileQuotaStreamWithWrite : public FileQuotaStream<FileStreamBase>
+{
+public:
+  // nsFileStreamBase override
+  NS_IMETHOD
+  Write(const char* aBuf, uint32_t aCount, uint32_t* _retval) MOZ_OVERRIDE;
+
+protected:
+  FileQuotaStreamWithWrite(PersistenceType aPersistenceType,
+                           const nsACString& aGroup, const nsACString& aOrigin)
+  : FileQuotaStream<FileStreamBase>(aPersistenceType, aGroup, aOrigin)
+  { }
+};
+
+class FileInputStream : public FileQuotaStream<nsFileInputStream>
+{
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+
+  static already_AddRefed<FileInputStream>
+  Create(PersistenceType aPersistenceType, const nsACString& aGroup,
+         const nsACString& aOrigin, nsIFile* aFile, int32_t aIOFlags = -1,
+         int32_t aPerm = -1, int32_t aBehaviorFlags = 0);
+
+private:
+  FileInputStream(PersistenceType aPersistenceType, const nsACString& aGroup,
+                  const nsACString& aOrigin)
+  : FileQuotaStream<nsFileInputStream>(aPersistenceType, aGroup, aOrigin)
+  { }
+
+  virtual ~FileInputStream() {
+    Close();
+  }
+};
+
+class FileOutputStream : public FileQuotaStreamWithWrite<nsFileOutputStream>
+{
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+
+  static already_AddRefed<FileOutputStream>
+  Create(PersistenceType aPersistenceType, const nsACString& aGroup,
+         const nsACString& aOrigin, nsIFile* aFile, int32_t aIOFlags = -1,
+         int32_t aPerm = -1, int32_t aBehaviorFlags = 0);
+
+private:
+  FileOutputStream(PersistenceType aPersistenceType, const nsACString& aGroup,
+                   const nsACString& aOrigin)
+  : FileQuotaStreamWithWrite<nsFileOutputStream>(aPersistenceType, aGroup,
+                                                 aOrigin)
+  { }
+
+  virtual ~FileOutputStream() {
+    Close();
+  }
+};
+
+class FileStream : public FileQuotaStreamWithWrite<nsFileStream>
+{
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+
+  static already_AddRefed<FileStream>
+  Create(PersistenceType aPersistenceType, const nsACString& aGroup,
+         const nsACString& aOrigin, nsIFile* aFile, int32_t aIOFlags = -1,
+         int32_t aPerm = -1, int32_t aBehaviorFlags = 0);
+
+private:
+  FileStream(PersistenceType aPersistenceType, const nsACString& aGroup,
+             const nsACString& aOrigin)
+  : FileQuotaStreamWithWrite<nsFileStream>(aPersistenceType, aGroup, aOrigin)
+  { }
+
+  virtual ~FileStream() {
+    Close();
+  }
+};
+
+END_QUOTA_NAMESPACE
+
+#endif /* mozilla_dom_quota_filestreams_h__ */