1/*
2 * Copyright (C) 2009 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef ByteArray_h
27#define ByteArray_h
28
29#include <wtf/PassRefPtr.h>
30#include <wtf/RefCounted.h>
31
32namespace WTF {
33 class ByteArray : public RefCountedBase {
34 public:
35 unsigned length() const { return m_size; }
36
37 void set(unsigned index, double value)
38 {
39 if (index >= m_size)
40 return;
41 if (!(value > 0)) // Clamp NaN to 0
42 value = 0;
43 else if (value > 255)
44 value = 255;
45 m_data[index] = static_cast<unsigned char>(value + 0.5);
46 }
47
48 void set(unsigned index, unsigned char value)
49 {
50 if (index >= m_size)
51 return;
52 m_data[index] = value;
53 }
54
55 bool get(unsigned index, unsigned char& result) const
56 {
57 if (index >= m_size)
58 return false;
59 result = m_data[index];
60 return true;
61 }
62
63 unsigned char get(unsigned index) const
64 {
65 ASSERT(index < m_size);
66 return m_data[index];
67 }
68
69 unsigned char* data() { return m_data; }
70
71 void deref()
72 {
73 if (derefBase()) {
74 // We allocated with new unsigned char[] in create(),
75 // and then used placement new to construct the object.
76 this->~ByteArray();
77 delete[] reinterpret_cast<unsigned char*>(this);
78 }
79 }
80
81 static PassRefPtr<ByteArray> create(size_t size);
82
83 private:
84 ByteArray(size_t size)
85 : m_size(size)
86 {
87 }
88 size_t m_size;
89 unsigned char m_data[sizeof(size_t)];
90 };
91}
92
93#endif
94

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/wtf/ByteArray.h