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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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 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 NPL, 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 NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
#ifndef nsIUnicharBuffer_h___
#define nsIUnicharBuffer_h___

#include "nscore.h"
#include "nsISupports.h"

#define NS_IUNICHARBUFFER_IID \
{ 0x14cf6970, 0x93b5, 0x11d1, \
  {0x89, 0x5b, 0x00, 0x60, 0x08, 0x91, 0x1b, 0x81} }

/// Interface to a buffer that holds unicode characters
class nsIUnicharBuffer : public nsISupports {
public:
  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IUNICHARBUFFER_IID);

  NS_IMETHOD Init(PRUint32 aBufferSize) = 0;
  NS_IMETHOD_(PRInt32) GetLength() const = 0;
  NS_IMETHOD_(PRInt32) GetBufferSize() const = 0;
  NS_IMETHOD_(PRUnichar*) GetBuffer() const = 0;
  NS_IMETHOD_(PRBool) Grow(PRInt32 aNewSize) = 0;
};

/// Factory method for nsIUnicharBuffer.
extern NS_COM nsresult
NS_NewUnicharBuffer(nsIUnicharBuffer** aInstancePtrResult,
                    nsISupports* aOuter,
                    PRUint32 aBufferSize = 0);

#define NS_UNICHARBUFFER_CID                         \
{ /* c81fd8f0-0d6b-11d3-9331-00104ba0fd40 */         \
    0xc81fd8f0,                                      \
    0x0d6b,                                          \
    0x11d3,                                          \
    {0x93, 0x31, 0x00, 0x10, 0x4b, 0xa0, 0xfd, 0x40} \
}

#endif /* nsIUnicharBuffer_h___ */