1/* 2 * Copyright (C) 2010 Google 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 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef DataView_h 27#define DataView_h 28 29#include <wtf/ArrayBufferView.h> 30#include <wtf/PassRefPtr.h> 31 32namespace WebCore { 33 34typedef int ExceptionCode; 35 36class DataView : public ArrayBufferView { 37public: 38 static PassRefPtr<DataView> create(unsigned length); 39 static PassRefPtr<DataView> create(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned byteLength); 40 41 virtual unsigned length() const { return m_byteLength; } 42 virtual unsigned byteLength() const { return m_byteLength; } 43 virtual PassRefPtr<ArrayBufferView> slice(int, int) const { return 0; } 44 45 int8_t getInt8(unsigned byteOffset, ExceptionCode&); 46 uint8_t getUint8(unsigned byteOffset, ExceptionCode&); 47 int16_t getInt16(unsigned byteOffset, ExceptionCode& ec) { return getInt16(byteOffset, false, ec); } 48 int16_t getInt16(unsigned byteOffset, bool littleEndian, ExceptionCode&); 49 uint16_t getUint16(unsigned byteOffset, ExceptionCode& ec) { return getUint16(byteOffset, false, ec); } 50 uint16_t getUint16(unsigned byteOffset, bool littleEndian, ExceptionCode&); 51 int32_t getInt32(unsigned byteOffset, ExceptionCode& ec) { return getInt32(byteOffset, false, ec); } 52 int32_t getInt32(unsigned byteOffset, bool littleEndian, ExceptionCode&); 53 uint32_t getUint32(unsigned byteOffset, ExceptionCode& ec) { return getUint32(byteOffset, false, ec); } 54 uint32_t getUint32(unsigned byteOffset, bool littleEndian, ExceptionCode&); 55 float getFloat32(unsigned byteOffset, ExceptionCode& ec) { return getFloat32(byteOffset, false, ec); } 56 float getFloat32(unsigned byteOffset, bool littleEndian, ExceptionCode&); 57 double getFloat64(unsigned byteOffset, ExceptionCode& ec) { return getFloat64(byteOffset, false, ec); } 58 double getFloat64(unsigned byteOffset, bool littleEndian, ExceptionCode&); 59 60 void setInt8(unsigned byteOffset, int8_t value, ExceptionCode&); 61 void setUint8(unsigned byteOffset, uint8_t value, ExceptionCode&); 62 void setInt16(unsigned byteOffset, int16_t value, ExceptionCode& ec) { setInt16(byteOffset, value, false, ec); } 63 void setInt16(unsigned byteOffset, int16_t value, bool littleEndian, ExceptionCode&); 64 void setUint16(unsigned byteOffset, uint16_t value, ExceptionCode& ec) { setUint16(byteOffset, value, false, ec); } 65 void setUint16(unsigned byteOffset, uint16_t value, bool littleEndian, ExceptionCode&); 66 void setInt32(unsigned byteOffset, int32_t value, ExceptionCode& ec) { setInt32(byteOffset, value, false, ec); } 67 void setInt32(unsigned byteOffset, int32_t value, bool littleEndian, ExceptionCode&); 68 void setUint32(unsigned byteOffset, uint32_t value, ExceptionCode& ec) { setUint32(byteOffset, value, false, ec); } 69 void setUint32(unsigned byteOffset, uint32_t value, bool littleEndian, ExceptionCode&); 70 void setFloat32(unsigned byteOffset, float value, ExceptionCode& ec) { setFloat32(byteOffset, value, false, ec); } 71 void setFloat32(unsigned byteOffset, float value, bool littleEndian, ExceptionCode&); 72 void setFloat64(unsigned byteOffset, double value, ExceptionCode& ec) { setFloat64(byteOffset, value, false, ec); } 73 void setFloat64(unsigned byteOffset, double value, bool littleEndian, ExceptionCode&); 74 75 virtual ViewType getType() const 76 { 77 return TypeDataView; 78 } 79 80protected: 81 virtual void neuter(); 82 83private: 84 DataView(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned byteLength); 85 86 template<typename T> 87 inline bool beyondRange(unsigned byteOffset) const { return byteOffset >= m_byteLength || byteOffset + sizeof(T) > m_byteLength; } 88 89 template<typename T> 90 T getData(unsigned byteOffset, bool littleEndian, ExceptionCode&) const; 91 92 template<typename T> 93 void setData(unsigned byteOffset, T value, bool littleEndian, ExceptionCode&); 94 95 unsigned m_byteLength; 96}; 97 98 99} // namespace WebCore 100 101#endif // DataView_h 102