1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/*
* Copyright (C) 2006 Apple Inc. All rights reserved.
* Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SharedBuffer_h
#define SharedBuffer_h
#include <runtime/ArrayBuffer.h>
#include <wtf/Forward.h>
#include <wtf/OwnPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
#if USE(CF)
#include <wtf/RetainPtr.h>
#endif
#if USE(SOUP)
#include "GUniquePtrSoup.h"
#endif
#if USE(FOUNDATION)
OBJC_CLASS NSData;
#endif
namespace WebCore {
class SharedBuffer : public RefCounted<SharedBuffer> {
public:
static PassRefPtr<SharedBuffer> create() { return adoptRef(new SharedBuffer); }
static PassRefPtr<SharedBuffer> create(unsigned size) { return adoptRef(new SharedBuffer(size)); }
static PassRefPtr<SharedBuffer> create(const char* c, unsigned i) { return adoptRef(new SharedBuffer(c, i)); }
static PassRefPtr<SharedBuffer> create(const unsigned char* c, unsigned i) { return adoptRef(new SharedBuffer(c, i)); }
WEBCORE_EXPORT static PassRefPtr<SharedBuffer> createWithContentsOfFile(const String& filePath);
WEBCORE_EXPORT static PassRefPtr<SharedBuffer> adoptVector(Vector<char>& vector);
WEBCORE_EXPORT ~SharedBuffer();
#if USE(FOUNDATION)
WEBCORE_EXPORT RetainPtr<NSData> createNSData();
WEBCORE_EXPORT static PassRefPtr<SharedBuffer> wrapNSData(NSData *data);
#endif
#if USE(CF)
WEBCORE_EXPORT RetainPtr<CFDataRef> createCFData();
WEBCORE_EXPORT CFDataRef existingCFData();
WEBCORE_EXPORT static PassRefPtr<SharedBuffer> wrapCFData(CFDataRef);
#endif
#if USE(SOUP)
static PassRefPtr<SharedBuffer> wrapSoupBuffer(SoupBuffer*);
#endif
// Calling this function will force internal segmented buffers
// to be merged into a flat buffer. Use getSomeData() whenever possible
// for better performance.
WEBCORE_EXPORT const char* data() const;
// Creates an ArrayBuffer and copies this SharedBuffer's contents to that
// ArrayBuffer without merging segmented buffers into a flat buffer.
PassRefPtr<ArrayBuffer> createArrayBuffer() const;
WEBCORE_EXPORT unsigned size() const;
bool isEmpty() const { return !size(); }
WEBCORE_EXPORT void append(SharedBuffer*);
WEBCORE_EXPORT void append(const char*, unsigned);
void append(const Vector<char>&);
void clear();
const char* platformData() const;
unsigned platformDataSize() const;
#if USE(NETWORK_CFDATA_ARRAY_CALLBACK)
static PassRefPtr<SharedBuffer> wrapCFDataArray(CFArrayRef);
void append(CFDataRef);
#endif
PassRefPtr<SharedBuffer> copy() const;
// Return the number of consecutive bytes after "position". "data"
// points to the first byte.
// Return 0 when no more data left.
// When extracting all data with getSomeData(), the caller should
// repeat calling it until it returns 0.
// Usage:
// const char* segment;
// unsigned pos = 0;
// while (unsigned length = sharedBuffer->getSomeData(segment, pos)) {
// // Use the data. for example: decoder->decode(segment, length);
// pos += length;
// }
WEBCORE_EXPORT unsigned getSomeData(const char*& data, unsigned position = 0) const;
void tryReplaceContentsWithPlatformBuffer(SharedBuffer*);
WEBCORE_EXPORT bool hasPlatformData() const;
struct DataBuffer : public ThreadSafeRefCounted<DataBuffer> {
Vector<char> data;
};
private:
WEBCORE_EXPORT SharedBuffer();
explicit SharedBuffer(unsigned);
WEBCORE_EXPORT SharedBuffer(const char*, unsigned);
WEBCORE_EXPORT SharedBuffer(const unsigned char*, unsigned);
// Calling this function will force internal segmented buffers
// to be merged into a flat buffer. Use getSomeData() whenever possible
// for better performance.
const Vector<char>& buffer() const;
void clearPlatformData();
void maybeTransferPlatformData();
bool maybeAppendPlatformData(SharedBuffer*);
void copyBufferAndClear(char* destination, unsigned bytesToCopy) const;
void appendToDataBuffer(const char *, unsigned) const;
void duplicateDataBufferIfNecessary() const;
void clearDataBuffer();
unsigned m_size;
mutable RefPtr<DataBuffer> m_buffer;
#if USE(NETWORK_CFDATA_ARRAY_CALLBACK)
explicit SharedBuffer(CFArrayRef);
mutable Vector<RetainPtr<CFDataRef>> m_dataArray;
unsigned copySomeDataFromDataArray(const char*& someData, unsigned position) const;
const char *singleDataArrayBuffer() const;
bool maybeAppendDataArray(SharedBuffer*);
#else
mutable Vector<char*> m_segments;
#endif
#if USE(CF)
explicit SharedBuffer(CFDataRef);
RetainPtr<CFDataRef> m_cfData;
#endif
#if USE(SOUP)
explicit SharedBuffer(SoupBuffer*);
GUniquePtr<SoupBuffer> m_soupBuffer;
#endif
};
PassRefPtr<SharedBuffer> utf8Buffer(const String&);
} // namespace WebCore
#endif // SharedBuffer_h
|
