/*

 * 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. 

 */

#include "config.h"

#include "FoundationExtras.h"

#include "SharedBuffer.h"

#include "WebCoreObjCExtras.h"

#include <string.h>

#include <wtf/PassRefPtr.h>

using namespace WebCore;

@interface SharedBufferData : NSData

{

    SharedBuffer* sharedBuffer;

}

- (id)initWithSharedBuffer:(SharedBuffer*)buffer;

@end

@implementation SharedBufferData

#ifndef BUILDING_ON_TIGER

+ (void)initialize

{

    WebCoreObjCFinalizeOnMainThread(self);

}

#endif

- (void)dealloc

{

    sharedBuffer->deref();

    [super dealloc];

}

- (void)finalize

{

    sharedBuffer->deref();

    [super finalize];

}

- (id)initWithSharedBuffer:(SharedBuffer*)buffer

{

    self = [super init];

    if (self) {

        sharedBuffer = buffer;

        sharedBuffer->ref();

    }

    return self;

}

- (unsigned)length

{

    return sharedBuffer->size();

}

- (const void *)bytes

{

    return reinterpret_cast<const void*>(sharedBuffer->data());

}

@end

namespace WebCore {

PassRefPtr<SharedBuffer> SharedBuffer::wrapNSData(NSData *nsData)

{

    return new SharedBuffer(nsData);

}

SharedBuffer::SharedBuffer(NSData *nsData)

    : m_nsData(nsData)

{

}

NSData *SharedBuffer::createNSData()

{    

    return [[SharedBufferData alloc] initWithSharedBuffer:this];

}

CFDataRef SharedBuffer::createCFData()

{    

    return (CFDataRef)HardRetainWithNSRelease([[SharedBufferData alloc] initWithSharedBuffer:this]);

}

bool SharedBuffer::hasPlatformData() const

{

    return m_nsData;

}

const char* SharedBuffer::platformData() const

{

    return (const char*)[m_nsData.get() bytes];

}

unsigned SharedBuffer::platformDataSize() const

{

    return [m_nsData.get() length];

}

void SharedBuffer::maybeTransferPlatformData()

{

    if (!m_nsData)

        return;

    ASSERT(m_buffer.size() == 0);

    m_buffer.append(reinterpret_cast<const char*>([m_nsData.get() bytes]), [m_nsData.get() length]);

    m_nsData = nil;

}

void SharedBuffer::clearPlatformData()

{

    m_nsData = 0;

}

PassRefPtr<SharedBuffer> SharedBuffer::createWithContentsOfFile(const String& filePath)

{

    NSData *resourceData = [NSData dataWithContentsOfFile:filePath];

    if (resourceData) 

        return SharedBuffer::wrapNSData(resourceData);

    return 0;

}

}