1/*
2 * Copyright (C) 2009 Google 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef WebData_h
32#define WebData_h
33
34#include "WebCommon.h"
35#include "WebPrivatePtr.h"
36
37namespace blink {
38
39class SharedBuffer;
40class WebDataPrivate;
41
42// A container for raw bytes.  It is inexpensive to copy a WebData object.
43//
44// WARNING: It is not safe to pass a WebData across threads!!!
45//
46class BLINK_PLATFORM_EXPORT WebData {
47public:
48    ~WebData() { reset(); }
49
50    WebData() { }
51
52    WebData(const char* data, size_t size)
53    {
54        assign(data, size);
55    }
56
57    template <int N>
58    WebData(const char (&data)[N])
59    {
60        assign(data, N - 1);
61    }
62
63    WebData(const WebData& d) { assign(d); }
64
65    WebData& operator=(const WebData& d)
66    {
67        assign(d);
68        return *this;
69    }
70
71    void reset();
72    void assign(const WebData&);
73    void assign(const char* data, size_t size);
74
75    size_t size() const;
76    const char* data() const;
77
78    bool isEmpty() const { return !size(); }
79    bool isNull() const { return m_private.isNull(); }
80
81#if INSIDE_BLINK
82    WebData(const PassRefPtr<SharedBuffer>&);
83    WebData& operator=(const PassRefPtr<SharedBuffer>&);
84    operator PassRefPtr<SharedBuffer>() const;
85#else
86    template <class C>
87    WebData(const C& c)
88    {
89        assign(c.data(), c.size());
90    }
91
92    template <class C>
93    WebData& operator=(const C& c)
94    {
95        assign(c.data(), c.size());
96        return *this;
97    }
98#endif
99
100private:
101    WebPrivatePtr<SharedBuffer> m_private;
102};
103
104} // namespace blink
105
106#endif
107