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 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) 44 CFDataRef SharedBuffer::createCFData() 45 { 46 if (m_cfData) { 47 CFRetain(m_cfData.get()); 48 return m_cfData.get(); 49 } 50 51 return CFDataCreate(0, reinterpret_cast<const UInt8*>(m_buffer.data()), m_buffer.size()); 52 } 53 #endif 54 55 PassRefPtr<SharedBuffer> SharedBuffer::wrapCFData(CFDataRef data) 56 { 57 return adoptRef(new SharedBuffer(data)); 58 } 59 60 bool SharedBuffer::hasPlatformData() const 61 { 62 return m_cfData; 63 } 64 65 const char* SharedBuffer::platformData() const 66 { 67 return (const char*)CFDataGetBytePtr(m_cfData.get()); 68 } 69 70 unsigned SharedBuffer::platformDataSize() const 71 { 72 return CFDataGetLength(m_cfData.get()); 73 } 74 75 void SharedBuffer::maybeTransferPlatformData() 76 { 77 if (!m_cfData) 78 return; 79 80 ASSERT(!m_size); 81 82 append((const char*)CFDataGetBytePtr(m_cfData.get()), CFDataGetLength(m_cfData.get())); 83 84 m_cfData = 0; 85 } 86 87 void SharedBuffer::clearPlatformData() 88 { 89 m_cfData = 0; 90 } 91 92 } 93