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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 
37 namespace blink {
38 
39 class SharedBuffer;
40 class 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 //
46 class BLINK_PLATFORM_EXPORT WebData {
47 public:
~WebData()48     ~WebData() { reset(); }
49 
WebData()50     WebData() { }
51 
WebData(const char * data,size_t size)52     WebData(const char* data, size_t size)
53     {
54         assign(data, size);
55     }
56 
57     template <int N>
WebData(const char (& data)[N])58     WebData(const char (&data)[N])
59     {
60         assign(data, N - 1);
61     }
62 
WebData(const WebData & d)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 
isEmpty()78     bool isEmpty() const { return !size(); }
isNull()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>
WebData(const C & 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 
100 private:
101     WebPrivatePtr<SharedBuffer> m_private;
102 };
103 
104 } // namespace blink
105 
106 #endif
107