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#pragma once
27
28#include "APIObject.h"
29#include "DataReference.h"
30#include <wtf/Forward.h>
31
32#if PLATFORM(COCOA)
33#include <wtf/RetainPtr.h>
34#endif
35
36namespace IPC {
37class Decoder;
38class Encoder;
39}
40
41OBJC_CLASS NSData;
42
43namespace API {
44
45class Data : public ObjectImpl<API::Object::Type::Data> {
46public:
47 typedef void (*FreeDataFunction)(unsigned char*, const void* context);
48
49 static Ref<Data> createWithoutCopying(const unsigned char* bytes, size_t size, FreeDataFunction freeDataFunction, const void* context)
50 {
51 return adoptRef(*new Data(bytes, size, freeDataFunction, context));
52 }
53
54 static Ref<Data> create(const unsigned char* bytes, size_t size)
55 {
56 unsigned char *copiedBytes = 0;
57
58 if (size) {
59 copiedBytes = static_cast<unsigned char*>(fastMalloc(size));
60 memcpy(copiedBytes, bytes, size);
61 }
62
63 return createWithoutCopying(copiedBytes, size, fastFreeBytes, 0);
64 }
65
66 static Ref<Data> create(const Vector<unsigned char>& buffer)
67 {
68 return create(buffer.data(), buffer.size());
69 }
70
71#if PLATFORM(COCOA)
72 static Ref<Data> createWithoutCopying(RetainPtr<NSData>);
73#endif
74
75 ~Data()
76 {
77 m_freeDataFunction(const_cast<unsigned char*>(m_bytes), m_context);
78 }
79
80 const unsigned char* bytes() const { return m_bytes; }
81 size_t size() const { return m_size; }
82
83 IPC::DataReference dataReference() const { return IPC::DataReference(m_bytes, m_size); }
84
85 void encode(IPC::Encoder&) const;
86 static bool decode(IPC::Decoder&, RefPtr<API::Object>&);
87
88private:
89 Data(const unsigned char* bytes, size_t size, FreeDataFunction freeDataFunction, const void* context)
90 : m_bytes(bytes)
91 , m_size(size)
92 , m_freeDataFunction(freeDataFunction)
93 , m_context(context)
94 {
95 }
96
97 static void fastFreeBytes(unsigned char* bytes, const void*)
98 {
99 if (bytes)
100 fastFree(static_cast<void*>(bytes));
101 }
102
103 const unsigned char* m_bytes;
104 size_t m_size;
105
106 FreeDataFunction m_freeDataFunction;
107 const void* m_context;
108};
109
110} // namespace API
111