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 33namespace WebCore { 34 35SharedBuffer::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) 44CFDataRef 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 57PassRefPtr<SharedBuffer> SharedBuffer::wrapCFData(CFDataRef data) 58{ 59 return adoptRef(new SharedBuffer(data)); 60} 61 62bool SharedBuffer::hasPlatformData() const 63{ 64 return m_cfData; 65} 66 67const char* SharedBuffer::platformData() const 68{ 69 return (const char*)CFDataGetBytePtr(m_cfData.get()); 70} 71 72unsigned SharedBuffer::platformDataSize() const 73{ 74 return CFDataGetLength(m_cfData.get()); 75} 76 77void 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 89void SharedBuffer::clearPlatformData() 90{ 91 m_cfData = 0; 92} 93 94#if HAVE(CFNETWORK_DATA_ARRAY_CALLBACK) 95void SharedBuffer::append(CFDataRef data) 96{ 97 ASSERT(data); 98 m_dataArray.append(data); 99 m_size += CFDataGetLength(data); 100} 101 102void 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