/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
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 * 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
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 * 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.
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 * Contributor(s):
 *
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 * 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
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#include "nsIConverterInputStream.h"
#include "nsString.h"

#include "nsCOMPtr.h"
#include "nsIUnicodeDecoder.h"
#include "nsIByteBuffer.h"
#include "nsIUnicharBuffer.h"

#define NS_CONVERTERINPUTSTREAM_CONTRACTID "@mozilla.org/intl/converter-input-stream;1"

// {2BC2AD62-AD5D-4b7b-A9DB-F74AE203C527}
#define NS_CONVERTERINPUTSTREAM_CID \
  { 0x2bc2ad62, 0xad5d, 0x4b7b, \
   { 0xa9, 0xdb, 0xf7, 0x4a, 0xe2, 0x3, 0xc5, 0x27 } }



class nsConverterInputStream : nsIConverterInputStream {

 public:
    NS_DECL_ISUPPORTS
    NS_IMETHOD Read(PRUnichar* aBuf,
                    PRUint32 aCount,
                    PRUint32 *aReadCount);
    NS_IMETHOD Close();
    NS_IMETHOD Init(nsIInputStream* aStream, const char *aCharset,
                    PRInt32 aBufferSize, PRBool aRecoverFromErrors);
    NS_IMETHOD ReadSegments(nsWriteUnicharSegmentFun aWriter,
                            void* aClosure,
                            PRUint32 aCount, PRUint32* aReadCount);

    nsConverterInputStream() :
        mLastErrorCode(NS_OK),
        mLeftOverBytes(0),
        mUnicharDataOffset(0),
        mUnicharDataLength(0),
        mRecoverFromErrors(PR_FALSE) { }
    
    virtual ~nsConverterInputStream() {}

 private:


    PRUint32 Fill(nsresult *aErrorCode);
    
    nsCOMPtr<nsIUnicodeDecoder> mConverter;
    nsCOMPtr<nsIByteBuffer> mByteData;
    nsCOMPtr<nsIUnicharBuffer> mUnicharData;
    nsCOMPtr<nsIInputStream> mInput;

    nsresult mLastErrorCode;
    PRUint32 mLeftOverBytes;
    PRUint32 mUnicharDataOffset;
    PRUint32 mUnicharDataLength;
    PRBool   mRecoverFromErrors;
    
};