/*

 * Copyright (C) 2009 Google 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:

 *

 *     * Redistributions of source code must retain the above copyright

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

 *     * 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.

 *     * Neither the name of Google Inc. nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "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 THE COPYRIGHT

 * OWNER 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 WebData_h

#define WebData_h

#include "WebCommon.h"

#if WEBKIT_IMPLEMENTATION

namespace WebCore { class SharedBuffer; }

namespace WTF { template <typename T> class PassRefPtr; }

#endif

namespace WebKit {

class WebDataPrivate;

// A container for raw bytes.  It is inexpensive to copy a WebData object.

//

// WARNING: It is not safe to pass a WebData across threads!!!

//

class WebData {

public:

    ~WebData() { reset(); }

    WebData() : m_private(0) { }

    WebData(const char* data, size_t size) : m_private(0)

    {

        assign(data, size);

    }

    template <int N>

    WebData(const char (&data)[N]) : m_private(0)

    {

        assign(data, N - 1);

    }

    WebData(const WebData& d) : m_private(0) { assign(d); }

    WebData& operator=(const WebData& d)

    {

        assign(d);

        return *this;

    }

    WEBKIT_API void reset();

    WEBKIT_API void assign(const WebData&);

    WEBKIT_API void assign(const char* data, size_t size);

    WEBKIT_API size_t size() const;

    WEBKIT_API const char* data() const;

    bool isEmpty() const { return !size(); }

    bool isNull() const { return !m_private; }

#if WEBKIT_IMPLEMENTATION

    WebData(const WTF::PassRefPtr<WebCore::SharedBuffer>&);

    WebData& operator=(const WTF::PassRefPtr<WebCore::SharedBuffer>&);

    operator WTF::PassRefPtr<WebCore::SharedBuffer>() const;

#else

    template <class C>

    WebData(const C& c) : m_private(0)

    {

        assign(c.data(), c.size());

    }

    template <class C>

    WebData& operator=(const C& c)

    {

        assign(c.data(), c.size());

        return *this;

    }

#endif

private:

    void assign(WebDataPrivate*);

    WebDataPrivate* m_private;

};

} // namespace WebKit

#endif