/*

 * Copyright (C) 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 SharedBuffer_h

#define SharedBuffer_h

#include "PlatformString.h"

#include "Shared.h"

#include <wtf/Forward.h>

#include <wtf/Vector.h>

#if PLATFORM(MAC)

#include <wtf/RetainPtr.h>

#ifdef __OBJC__

@class NSData;

#else

class NSData;

#endif

#endif

namespace WebCore {

class SharedBuffer : public Shared<SharedBuffer> {

public:

    SharedBuffer();

    SharedBuffer(const char*, int);

    SharedBuffer(const unsigned char*, int);

    static PassRefPtr<SharedBuffer> createWithContentsOfFile(const String& filePath);

#if PLATFORM(MAC)

    NSData *createNSData();

    CFDataRef createCFData();

    static PassRefPtr<SharedBuffer> wrapNSData(NSData *data);

#endif

    const char* data() const;

    unsigned size() const;

    const Vector<char> &buffer() { return m_buffer; }

    bool isEmpty() const { return size() == 0; }

    void append(const char*, int);

    void clear();

    const char* platformData() const;

    unsigned platformDataSize() const;

    PassRefPtr<SharedBuffer> copy() const;

private:

    void clearPlatformData();

    void maybeTransferPlatformData();

    bool hasPlatformData() const;

    Vector<char> m_buffer;

#if PLATFORM(MAC)

    SharedBuffer(NSData *nsdata);

    RetainPtr<NSData> m_nsData;

#endif

};

}

#endif