1/* 2 * Copyright (C) 2013 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef JSArrayBufferViewInlines_h 27#define JSArrayBufferViewInlines_h 28 29#include "ArrayBufferView.h" 30#include "JSArrayBufferView.h" 31#include "JSDataView.h" 32 33namespace JSC { 34 35inline ArrayBuffer* JSArrayBufferView::buffer() 36{ 37 switch (m_mode) { 38 case WastefulTypedArray: 39 return existingBufferInButterfly(); 40 case DataViewMode: 41 return jsCast<JSDataView*>(this)->buffer(); 42 default: 43 return methodTable()->slowDownAndWasteMemory(this); 44 } 45} 46 47inline ArrayBuffer* JSArrayBufferView::existingBufferInButterfly() 48{ 49 ASSERT(m_mode == WastefulTypedArray); 50 return butterfly()->indexingHeader()->arrayBuffer(); 51} 52 53inline PassRefPtr<ArrayBufferView> JSArrayBufferView::impl() 54{ 55 return methodTable()->getTypedArrayImpl(this); 56} 57 58inline void JSArrayBufferView::neuter() 59{ 60 ASSERT(hasArrayBuffer()); 61 m_length = 0; 62 m_vector = 0; 63} 64 65inline unsigned JSArrayBufferView::byteOffset() 66{ 67 if (!hasArrayBuffer()) 68 return 0; 69 70 ptrdiff_t delta = 71 static_cast<uint8_t*>(m_vector) - static_cast<uint8_t*>(buffer()->data()); 72 73 unsigned result = static_cast<unsigned>(delta); 74 ASSERT(static_cast<ptrdiff_t>(result) == delta); 75 return result; 76} 77 78} // namespace JSC 79 80#endif // JSArrayBufferViewInlines_h 81 82