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diff --git a/src/libs/xpcom18a4/xpcom/io/nsIUnicharInputStream.h b/src/libs/xpcom18a4/xpcom/io/nsIUnicharInputStream.h
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+++ b/src/libs/xpcom18a4/xpcom/io/nsIUnicharInputStream.h
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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
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * 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 ***** */
+#ifndef nsIUnicharInputStream_h___
+#define nsIUnicharInputStream_h___
+
+#include "nsIInputStream.h"
+#include "nsString.h"
+#include "nscore.h"
+
+class nsIUnicharInputStream;
+
+typedef NS_CALLBACK(nsWriteUnicharSegmentFun)(nsIUnicharInputStream *aInStream,
+                                              void *aClosure,
+                                              const PRUnichar *aFromSegment,
+                                              PRUint32 aToOffset,
+                                              PRUint32 aCount,
+                                              PRUint32 *aWriteCount);
+/* c4bcf6ee-3a79-4d77-8d48-f17be3199b3b */
+#define NS_IUNICHAR_INPUT_STREAM_IID \
+{ 0xc4bcf6ee, 0x3a79, 0x4d77,        \
+  {0x8d, 0x48, 0xf1, 0x7b, 0xe3, 0x19, 0x9b, 0x3b} }
+
+/** Abstract unicode character input stream
+ *  @see nsIInputStream
+ */
+class NS_NO_VTABLE nsIUnicharInputStream : public nsISupports {
+public:
+	NS_DEFINE_STATIC_IID_ACCESSOR(NS_IUNICHAR_INPUT_STREAM_IID)
+
+  NS_IMETHOD Read(PRUnichar* aBuf,
+                  PRUint32 aCount,
+                  PRUint32 *aReadCount) = 0;
+  NS_IMETHOD Close() = 0;
+  NS_IMETHOD ReadSegments(nsWriteUnicharSegmentFun aWriter,
+                          void* aClosure,
+                          PRUint32 aCount,
+                          PRUint32 *aReadCount) = 0;
+};
+
+/**
+ * Create a nsIUnicharInputStream that wraps up a string. Data is fed
+ * from the string out until the done. When this object is destroyed
+ * it destroyes the string (so make a copy if you don't want it doing
+ * that)
+ */
+extern NS_COM nsresult
+  NS_NewStringUnicharInputStream(nsIUnicharInputStream** aInstancePtrResult,
+                                 nsString* aString);
+
+/** Create a new nsUnicharInputStream that provides a converter for the
+ * byte input stream aStreamToWrap. If no converter can be found then
+ * nsnull is returned and the error code is set to
+ * NS_INPUTSTREAM_NO_CONVERTER.
+ */
+extern NS_COM nsresult
+  NS_NewUTF8ConverterStream(nsIUnicharInputStream** aInstancePtrResult,
+                            nsIInputStream* aStreamToWrap,
+                            PRInt32 aBufferSize = 0);
+
+#endif /* nsUnicharInputStream_h___ */