1 /*
2 * Copyright (C) 2008, 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 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28 #include "config.h"
29 #include "SharedBuffer.h"
30
31 #include "PurgeableBuffer.h"
32
33 namespace WebCore {
34
SharedBuffer(CFDataRef cfData)35 SharedBuffer::SharedBuffer(CFDataRef cfData)
36 : m_size(0)
37 , m_cfData(cfData)
38 {
39 }
40
41 // Mac is a CF platform but has an even more efficient version of this method,
42 // so only use this version for non-Mac
43 #if !PLATFORM(MAC)
createCFData()44 CFDataRef SharedBuffer::createCFData()
45 {
46 if (m_cfData) {
47 CFRetain(m_cfData.get());
48 return m_cfData.get();
49 }
50
51 // Internal data in SharedBuffer can be segmented. We need to get the contiguous buffer.
52 const Vector<char>& contiguousBuffer = buffer();
53 return CFDataCreate(0, reinterpret_cast<const UInt8*>(contiguousBuffer.data()), contiguousBuffer.size());
54 }
55 #endif
56
wrapCFData(CFDataRef data)57 PassRefPtr<SharedBuffer> SharedBuffer::wrapCFData(CFDataRef data)
58 {
59 return adoptRef(new SharedBuffer(data));
60 }
61
hasPlatformData() const62 bool SharedBuffer::hasPlatformData() const
63 {
64 return m_cfData;
65 }
66
platformData() const67 const char* SharedBuffer::platformData() const
68 {
69 return (const char*)CFDataGetBytePtr(m_cfData.get());
70 }
71
platformDataSize() const72 unsigned SharedBuffer::platformDataSize() const
73 {
74 return CFDataGetLength(m_cfData.get());
75 }
76
maybeTransferPlatformData()77 void SharedBuffer::maybeTransferPlatformData()
78 {
79 if (!m_cfData)
80 return;
81
82 ASSERT(!m_size);
83
84 append((const char*)CFDataGetBytePtr(m_cfData.get()), CFDataGetLength(m_cfData.get()));
85
86 m_cfData = 0;
87 }
88
clearPlatformData()89 void SharedBuffer::clearPlatformData()
90 {
91 m_cfData = 0;
92 }
93
94 #if HAVE(CFNETWORK_DATA_ARRAY_CALLBACK)
append(CFDataRef data)95 void SharedBuffer::append(CFDataRef data)
96 {
97 ASSERT(data);
98 m_dataArray.append(data);
99 m_size += CFDataGetLength(data);
100 }
101
copyDataArrayAndClear(char * destination,unsigned bytesToCopy) const102 void SharedBuffer::copyDataArrayAndClear(char *destination, unsigned bytesToCopy) const
103 {
104 if (m_dataArray.isEmpty())
105 return;
106
107 CFIndex bytesLeft = bytesToCopy;
108 Vector<RetainPtr<CFDataRef> >::const_iterator end = m_dataArray.end();
109 for (Vector<RetainPtr<CFDataRef> >::const_iterator it = m_dataArray.begin(); it != end; ++it) {
110 CFIndex dataLen = CFDataGetLength(it->get());
111 ASSERT(bytesLeft >= dataLen);
112 memcpy(destination, CFDataGetBytePtr(it->get()), dataLen);
113 destination += dataLen;
114 bytesLeft -= dataLen;
115 }
116 m_dataArray.clear();
117 }
118 #endif
119
120 }
121