/*

 * Copyright (C) 2004, 2006 Apple Computer, Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#ifndef TextDecoder_h

#define TextDecoder_h

#include "PlatformString.h"

#include "TextCodec.h"

#include "TextEncoding.h"

#include <wtf/OwnPtr.h>

namespace WebCore {

    class TextCodec;

    class TextDecoder {

    public:

        TextDecoder(const TextEncoding&);

        void reset(const TextEncoding&);

        const TextEncoding& encoding() const { return m_encoding; };

        String decode(const char* data, size_t length, bool flush = false)

        {

            if (!m_checkedForBOM)

                return checkForBOM(data, length, flush);

            return m_codec->decode(data, length, flush);

        }

    private:

        String checkForBOM(const char*, size_t length, bool flush);

        TextEncoding m_encoding;

        OwnPtr<TextCodec> m_codec;

        bool m_checkedForBOM;

        unsigned char m_numBufferedBytes;

        unsigned char m_bufferedBytes[3];

    };

} // namespace WebCore

#endif // TextDecoder_h