1 files changed, 35 insertions, 0 deletions
diff --git a/comm/mailnews/base/src/nsMsgFileStream.h b/comm/mailnews/base/src/nsMsgFileStream.h
new file mode 100644
index 0000000000..11b5c24e91
--- /dev/null
+++ b/comm/mailnews/base/src/nsMsgFileStream.h
@@ -0,0 +1,35 @@
+/* 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/Attributes.h"
+#include "msgCore.h"
+#include "nsIInputStream.h"
+#include "nsIOutputStream.h"
+#include "nsISeekableStream.h"
+#include "prio.h"
+
+class nsMsgFileStream final : public nsIInputStream,
+                              public nsIOutputStream,
+                              public nsISeekableStream {
+ public:
+  nsMsgFileStream();
+
+  NS_DECL_ISUPPORTS
+
+  NS_IMETHOD Available(uint64_t* _retval) override;
+  NS_IMETHOD Read(char* aBuf, uint32_t aCount, uint32_t* _retval) override;
+  NS_IMETHOD ReadSegments(nsWriteSegmentFun aWriter, void* aClosure,
+                          uint32_t aCount, uint32_t* _retval) override;
+  NS_DECL_NSIOUTPUTSTREAM
+  NS_DECL_NSISEEKABLESTREAM
+  NS_DECL_NSITELLABLESTREAM
+
+  nsresult InitWithFile(nsIFile* localFile);
+
+ protected:
+  ~nsMsgFileStream();
+
+  PRFileDesc* mFileDesc;
+  bool mSeekedToEnd;
+};