/* -*- 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/. */
* This class is separate from nsISeekableStream in order to let streams to
* implement ::Tell() without implementing the whole nsISeekableStream
* interface. Callers can QI the stream to know what is implemented. This is
* mainly done for nsPipeInputStream.
* Implementing this interface, streams are able to expose the current offset
* via ::tell().
interface nsITellableStream : nsISupports
* This method reports the current offset, in bytes, from the start of the
* @throws NS_BASE_STREAM_CLOSED if called on a closed stream.
long long tell();