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 "ArrayBufferView.h" 30 #include "ExceptionCode.h" 31 #include <wtf/PassRefPtr.h> 32 33 namespace WebCore { 34 35 class DataView : public ArrayBufferView { 36 public: 37 static PassRefPtr<DataView> create(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned byteLength); 38 isDataView()39 virtual bool isDataView() const { return true; } length()40 virtual unsigned length() const { return m_byteLength; } byteLength()41 virtual unsigned byteLength() const { return m_byteLength; } slice(int,int)42 virtual PassRefPtr<ArrayBufferView> slice(int, int) const { return 0; } 43 44 int8_t getInt8(unsigned byteOffset, ExceptionCode&); 45 uint8_t getUint8(unsigned byteOffset, ExceptionCode&); getInt16(unsigned byteOffset,ExceptionCode & ec)46 int16_t getInt16(unsigned byteOffset, ExceptionCode& ec) { return getInt16(byteOffset, false, ec); } 47 int16_t getInt16(unsigned byteOffset, bool littleEndian, ExceptionCode&); getUint16(unsigned byteOffset,ExceptionCode & ec)48 uint16_t getUint16(unsigned byteOffset, ExceptionCode& ec) { return getUint16(byteOffset, false, ec); } 49 uint16_t getUint16(unsigned byteOffset, bool littleEndian, ExceptionCode&); getInt32(unsigned byteOffset,ExceptionCode & ec)50 int32_t getInt32(unsigned byteOffset, ExceptionCode& ec) { return getInt32(byteOffset, false, ec); } 51 int32_t getInt32(unsigned byteOffset, bool littleEndian, ExceptionCode&); getUint32(unsigned byteOffset,ExceptionCode & ec)52 uint32_t getUint32(unsigned byteOffset, ExceptionCode& ec) { return getUint32(byteOffset, false, ec); } 53 uint32_t getUint32(unsigned byteOffset, bool littleEndian, ExceptionCode&); getFloat32(unsigned byteOffset,ExceptionCode & ec)54 float getFloat32(unsigned byteOffset, ExceptionCode& ec) { return getFloat32(byteOffset, false, ec); } 55 float getFloat32(unsigned byteOffset, bool littleEndian, ExceptionCode&); getFloat64(unsigned byteOffset,ExceptionCode & ec)56 double getFloat64(unsigned byteOffset, ExceptionCode& ec) { return getFloat64(byteOffset, false, ec); } 57 double getFloat64(unsigned byteOffset, bool littleEndian, ExceptionCode&); 58 59 void setInt8(unsigned byteOffset, int8_t value, ExceptionCode&); 60 void setUint8(unsigned byteOffset, uint8_t value, ExceptionCode&); setInt16(unsigned byteOffset,int16_t value,ExceptionCode & ec)61 void setInt16(unsigned byteOffset, int16_t value, ExceptionCode& ec) { setInt16(byteOffset, value, false, ec); } 62 void setInt16(unsigned byteOffset, int16_t value, bool littleEndian, ExceptionCode&); setUint16(unsigned byteOffset,uint16_t value,ExceptionCode & ec)63 void setUint16(unsigned byteOffset, uint16_t value, ExceptionCode& ec) { setUint16(byteOffset, value, false, ec); } 64 void setUint16(unsigned byteOffset, uint16_t value, bool littleEndian, ExceptionCode&); setInt32(unsigned byteOffset,int32_t value,ExceptionCode & ec)65 void setInt32(unsigned byteOffset, int32_t value, ExceptionCode& ec) { setInt32(byteOffset, value, false, ec); } 66 void setInt32(unsigned byteOffset, int32_t value, bool littleEndian, ExceptionCode&); setUint32(unsigned byteOffset,uint32_t value,ExceptionCode & ec)67 void setUint32(unsigned byteOffset, uint32_t value, ExceptionCode& ec) { setUint32(byteOffset, value, false, ec); } 68 void setUint32(unsigned byteOffset, uint32_t value, bool littleEndian, ExceptionCode&); setFloat32(unsigned byteOffset,float value,ExceptionCode & ec)69 void setFloat32(unsigned byteOffset, float value, ExceptionCode& ec) { setFloat32(byteOffset, value, false, ec); } 70 void setFloat32(unsigned byteOffset, float value, bool littleEndian, ExceptionCode&); setFloat64(unsigned byteOffset,double value,ExceptionCode & ec)71 void setFloat64(unsigned byteOffset, double value, ExceptionCode& ec) { setFloat64(byteOffset, value, false, ec); } 72 void setFloat64(unsigned byteOffset, double value, bool littleEndian, ExceptionCode&); 73 74 private: 75 DataView(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned byteLength); 76 77 template<typename T> beyondRange(unsigned byteOffset)78 inline bool beyondRange(unsigned byteOffset) const { return byteOffset >= m_byteLength || byteOffset + sizeof(T) > m_byteLength; } 79 80 template<typename T> 81 T getData(unsigned byteOffset, bool littleEndian, ExceptionCode&) const; 82 83 template<typename T> 84 void setData(unsigned byteOffset, T value, bool littleEndian, ExceptionCode&); 85 86 unsigned m_byteLength; 87 }; 88 89 90 } // namespace WebCore 91 92 #endif // DataView_h 93