author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 01:32:07 +0300 | |
changeset 2 | 303757a437d3 |
parent 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
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* Copyright (C) Research In Motion Limited 2009-2010. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef SharedBuffer_h |
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#define SharedBuffer_h |
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#include "PlatformString.h" |
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#include <wtf/Forward.h> |
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#include <wtf/OwnPtr.h> |
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#include <wtf/RefCounted.h> |
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#include <wtf/Vector.h> |
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#if PLATFORM(CF) |
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#include <wtf/RetainPtr.h> |
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#endif |
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#if PLATFORM(MAC) |
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#ifdef __OBJC__ |
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@class NSData; |
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#else |
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class NSData; |
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#endif |
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#endif |
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namespace WebCore { |
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class PurgeableBuffer; |
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class SharedBuffer : public RefCounted<SharedBuffer> { |
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public: |
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static PassRefPtr<SharedBuffer> create() { return adoptRef(new SharedBuffer); } |
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static PassRefPtr<SharedBuffer> create(const char* c, int i) { return adoptRef(new SharedBuffer(c, i)); } |
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static PassRefPtr<SharedBuffer> create(const unsigned char* c, int i) { return adoptRef(new SharedBuffer(c, i)); } |
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static PassRefPtr<SharedBuffer> createWithContentsOfFile(const String& filePath); |
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static PassRefPtr<SharedBuffer> adoptVector(Vector<char>& vector); |
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// The buffer must be in non-purgeable state before adopted to a SharedBuffer. |
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// It will stay that way until released. |
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static PassRefPtr<SharedBuffer> adoptPurgeableBuffer(PassOwnPtr<PurgeableBuffer>); |
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~SharedBuffer(); |
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#if PLATFORM(MAC) |
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NSData *createNSData(); |
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static PassRefPtr<SharedBuffer> wrapNSData(NSData *data); |
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#endif |
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#if PLATFORM(CF) |
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CFDataRef createCFData(); |
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static PassRefPtr<SharedBuffer> wrapCFData(CFDataRef); |
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#endif |
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// Calling this function will force internal segmented buffers |
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// to be merged into a flat buffer. Use getSomeData() whenever possible |
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// for better performance. |
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const char* data() const; |
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unsigned size() const; |
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// Calling this function will force internal segmented buffers |
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// to be merged into a flat buffer. Use getSomeData() whenever possible |
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// for better performance. |
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const Vector<char>& buffer() const; |
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bool isEmpty() const { return !size(); } |
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void append(const char*, unsigned); |
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void clear(); |
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const char* platformData() const; |
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unsigned platformDataSize() const; |
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PassRefPtr<SharedBuffer> copy() const; |
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bool hasPurgeableBuffer() const { return m_purgeableBuffer.get(); } |
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// Ensure this buffer has no other clients before calling this. |
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PassOwnPtr<PurgeableBuffer> releasePurgeableBuffer(); |
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102 |
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// Return the number of consecutive bytes after "position". "data" |
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// points to the first byte. |
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// Return 0 when no more data left. |
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// When extracting all data with getSomeData(), the caller should |
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// repeat calling it until it returns 0. |
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// Usage: |
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// const char* segment; |
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// unsigned pos = 0; |
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// while (unsigned length = sharedBuffer->getSomeData(segment, pos)) { |
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// // Use the data. for example: decoder->decode(segment, length); |
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// pos += length; |
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// } |
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unsigned getSomeData(const char*& data, unsigned position = 0) const; |
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|
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private: |
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SharedBuffer(); |
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SharedBuffer(const char*, int); |
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SharedBuffer(const unsigned char*, int); |
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void clearPlatformData(); |
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void maybeTransferPlatformData(); |
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bool hasPlatformData() const; |
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unsigned m_size; |
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mutable Vector<char> m_buffer; |
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mutable Vector<char*> m_segments; |
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OwnPtr<PurgeableBuffer> m_purgeableBuffer; |
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#if PLATFORM(CF) |
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SharedBuffer(CFDataRef); |
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RetainPtr<CFDataRef> m_cfData; |
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#endif |
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}; |
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} |
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#endif // SharedBuffer_h |