1/* 2 * Copyright (C) 2010 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef DataReference_h 27#define DataReference_h 28 29#include <WebCore/SharedBuffer.h> 30#include <wtf/Vector.h> 31 32namespace IPC { 33 34class ArgumentDecoder; 35class ArgumentEncoder; 36 37class DataReference { 38public: 39 DataReference() 40 : m_data(0) 41 , m_size(0) 42 { 43 } 44 45 DataReference(const uint8_t* data, size_t size) 46 : m_data(data) 47 , m_size(size) 48 { 49 } 50 51 template<size_t inlineCapacity> 52 DataReference(const Vector<uint8_t, inlineCapacity>& vector) 53 : m_data(vector.data()) 54 , m_size(vector.size()) 55 { 56 } 57 58 bool isEmpty() const { return size() == 0; } 59 60 size_t size() const { return m_size; } 61 const uint8_t* data() const 62 { 63 if (isEmpty()) 64 return 0; 65 return m_data; 66 } 67 68 Vector<uint8_t> vector() const 69 { 70 Vector<uint8_t> result; 71 result.append(m_data, m_size); 72 73 return result; 74 } 75 76 virtual void encode(ArgumentEncoder&) const; 77 static bool decode(ArgumentDecoder&, DataReference&); 78 79 virtual ~DataReference() { } 80 81private: 82 const uint8_t* m_data; 83 size_t m_size; 84}; 85 86class SharedBufferDataReference: public DataReference { 87public: 88 SharedBufferDataReference(WebCore::SharedBuffer* buffer) 89 { 90 m_buffer = buffer; 91 } 92 93 size_t size() const { return m_buffer->size(); } 94 const uint8_t* data() const = delete; 95 Vector<uint8_t> vector() const = delete; 96 97 void encode(ArgumentEncoder&) const override; 98 virtual ~SharedBufferDataReference() { m_buffer = 0; } 99 100private: 101 RefPtr<WebCore::SharedBuffer> m_buffer; 102}; 103 104} // namespace IPC 105 106#endif // DataReference_h 107