/*

 * Copyright (C) 2009 Apple 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 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 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 ByteArray_h

#define ByteArray_h

#include <wtf/PassRefPtr.h>

#include <wtf/RefCounted.h>

namespace WTF {

    class ByteArray : public RefCountedBase {

    public:

        unsigned length() const { return m_size; }

        void set(unsigned index, double value)

        {

            if (index >= m_size)

                return;

            if (!(value > 0)) // Clamp NaN to 0

                value = 0;

            else if (value > 255)

                value = 255;

            m_data[index] = static_cast<unsigned char>(value + 0.5);

        }

        void set(unsigned index, unsigned char value)

        {

            if (index >= m_size)

                return;

            m_data[index] = value;

        }

        bool get(unsigned index, unsigned char& result) const

        {

            if (index >= m_size)

                return false;

            result = m_data[index];

            return true;

        }

        unsigned char get(unsigned index) const

        {

            ASSERT(index < m_size);

            return m_data[index];

        }

        unsigned char* data() { return m_data; }

        void deref()

        {

            if (derefBase()) {

                // We allocated with new unsigned char[] in create(),

                // and then used placement new to construct the object.

                this->~ByteArray();

                delete[] reinterpret_cast<unsigned char*>(this);

            }

        }

        static PassRefPtr<ByteArray> create(size_t size);

    private:

        ByteArray(size_t size)

            : m_size(size)

        {

        }

        size_t m_size;

        unsigned char m_data[sizeof(size_t)];

    };

}

#endif