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 WebData_h
27#define WebData_h
28
29#include "APIObject.h"
30#include "DataReference.h"
31#include <wtf/Forward.h>
32#include <wtf/Vector.h>
33
34namespace WebKit {
35
36// WebData - A data buffer type suitable for vending to an API.
37
38class WebData : public TypedAPIObject<APIObject::TypeData> {
39public:
40    typedef void (*FreeDataFunction)(unsigned char*, const void* context);
41
42    static PassRefPtr<WebData> createWithoutCopying(const unsigned char* bytes, size_t size, FreeDataFunction freeDataFunction, const void* context)
43    {
44        return adoptRef(new WebData(bytes, size, freeDataFunction, context));
45    }
46
47    static PassRefPtr<WebData> create(const unsigned char* bytes, size_t size)
48    {
49        unsigned char *copiedBytes = 0;
50
51        if (size) {
52            copiedBytes = static_cast<unsigned char*>(fastMalloc(size));
53            memcpy(copiedBytes, bytes, size);
54        }
55
56        return createWithoutCopying(copiedBytes, size, fastFreeBytes, 0);
57    }
58
59    static PassRefPtr<WebData> create(const Vector<unsigned char>& buffer)
60    {
61        return create(buffer.data(), buffer.size());
62    }
63
64    ~WebData()
65    {
66        m_freeDataFunction(const_cast<unsigned char*>(m_bytes), m_context);
67    }
68
69    const unsigned char* bytes() const { return m_bytes; }
70    size_t size() const { return m_size; }
71
72    CoreIPC::DataReference dataReference() const { return CoreIPC::DataReference(m_bytes, m_size); }
73
74private:
75    WebData(const unsigned char* bytes, size_t size, FreeDataFunction freeDataFunction, const void* context)
76        : m_bytes(bytes)
77        , m_size(size)
78        , m_freeDataFunction(freeDataFunction)
79        , m_context(context)
80    {
81    }
82
83    static void fastFreeBytes(unsigned char* bytes, const void*)
84    {
85        if (bytes)
86            fastFree(static_cast<void*>(bytes));
87    }
88
89    const unsigned char* m_bytes;
90    size_t m_size;
91
92    FreeDataFunction m_freeDataFunction;
93    const void* m_context;
94};
95
96} // namespace WebKit
97
98#endif // WebData_h
99