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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is the Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2011
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Kyle Huey <me@kylehuey.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

interface nsIInputStream;

/**
 * nsIScriptableBase64Encoder efficiently encodes the contents
 * of a nsIInputStream to a Base64 string.  This avoids the need
 * to read the entire stream into a buffer, and only then do the
 * Base64 encoding.
 *
 *  If you already have a buffer full of data, you should use
 *  btoa instead!
 */
[scriptable, uuid(9479c864-d1f9-45ab-b7b9-28b907bd2ba9)]
interface nsIScriptableBase64Encoder : nsISupports
{
  /**
   *  These methods take an nsIInputStream and return a narrow or wide
   *  string with the contents of the nsIInputStream base64 encoded.
   *
   *  The stream passed in must support ReadSegments and must not be
   *  a non-blocking stream that will return NS_BASE_STREAM_WOULD_BLOCK.
   *  If either of these restrictions are violated we will abort.
   */
  ACString encodeToCString(in nsIInputStream stream, in unsigned long length);
  AString encodeToString(in nsIInputStream stream, in unsigned long length);
};