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 "bindings/v8/ScriptWrappable.h" 30 #include "wtf/ArrayBufferView.h" 31 #include "wtf/PassRefPtr.h" 32 33 namespace WebCore { 34 35 class ExceptionState; 36 37 class DataView : public ArrayBufferView, public ScriptWrappable { 38 public: 39 static PassRefPtr<DataView> create(unsigned length); 40 static PassRefPtr<DataView> create(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned byteLength); 41 42 virtual unsigned length() const { return m_byteLength; } 43 virtual unsigned byteLength() const { return m_byteLength; } 44 virtual PassRefPtr<ArrayBufferView> slice(int, int) const { return 0; } 45 46 int8_t getInt8(unsigned byteOffset, ExceptionState&); 47 uint8_t getUint8(unsigned byteOffset, ExceptionState&); 48 int16_t getInt16(unsigned byteOffset, ExceptionState& ec) { return getInt16(byteOffset, false, ec); } 49 int16_t getInt16(unsigned byteOffset, bool littleEndian, ExceptionState&); 50 uint16_t getUint16(unsigned byteOffset, ExceptionState& ec) { return getUint16(byteOffset, false, ec); } 51 uint16_t getUint16(unsigned byteOffset, bool littleEndian, ExceptionState&); 52 int32_t getInt32(unsigned byteOffset, ExceptionState& ec) { return getInt32(byteOffset, false, ec); } 53 int32_t getInt32(unsigned byteOffset, bool littleEndian, ExceptionState&); 54 uint32_t getUint32(unsigned byteOffset, ExceptionState& ec) { return getUint32(byteOffset, false, ec); } 55 uint32_t getUint32(unsigned byteOffset, bool littleEndian, ExceptionState&); 56 float getFloat32(unsigned byteOffset, ExceptionState& ec) { return getFloat32(byteOffset, false, ec); } 57 float getFloat32(unsigned byteOffset, bool littleEndian, ExceptionState&); 58 double getFloat64(unsigned byteOffset, ExceptionState& ec) { return getFloat64(byteOffset, false, ec); } 59 double getFloat64(unsigned byteOffset, bool littleEndian, ExceptionState&); 60 61 void setInt8(unsigned byteOffset, int8_t value, ExceptionState&); 62 void setUint8(unsigned byteOffset, uint8_t value, ExceptionState&); 63 void setInt16(unsigned byteOffset, int16_t value, ExceptionState& ec) { setInt16(byteOffset, value, false, ec); } 64 void setInt16(unsigned byteOffset, int16_t value, bool littleEndian, ExceptionState&); 65 void setUint16(unsigned byteOffset, uint16_t value, ExceptionState& ec) { setUint16(byteOffset, value, false, ec); } 66 void setUint16(unsigned byteOffset, uint16_t value, bool littleEndian, ExceptionState&); 67 void setInt32(unsigned byteOffset, int32_t value, ExceptionState& ec) { setInt32(byteOffset, value, false, ec); } 68 void setInt32(unsigned byteOffset, int32_t value, bool littleEndian, ExceptionState&); 69 void setUint32(unsigned byteOffset, uint32_t value, ExceptionState& ec) { setUint32(byteOffset, value, false, ec); } 70 void setUint32(unsigned byteOffset, uint32_t value, bool littleEndian, ExceptionState&); 71 void setFloat32(unsigned byteOffset, float value, ExceptionState& ec) { setFloat32(byteOffset, value, false, ec); } 72 void setFloat32(unsigned byteOffset, float value, bool littleEndian, ExceptionState&); 73 void setFloat64(unsigned byteOffset, double value, ExceptionState& ec) { setFloat64(byteOffset, value, false, ec); } 74 void setFloat64(unsigned byteOffset, double value, bool littleEndian, ExceptionState&); 75 76 virtual ViewType getType() const 77 { 78 return TypeDataView; 79 } 80 81 protected: 82 virtual void neuter(); 83 84 private: 85 DataView(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned byteLength); 86 87 template<typename T> 88 inline bool beyondRange(unsigned byteOffset) const { return byteOffset >= m_byteLength || byteOffset + sizeof(T) > m_byteLength; } 89 90 template<typename T> 91 T getData(unsigned byteOffset, bool littleEndian, ExceptionState&) const; 92 93 template<typename T> 94 void setData(unsigned byteOffset, T value, bool littleEndian, ExceptionState&); 95 96 unsigned m_byteLength; 97 }; 98 99 100 } // namespace WebCore 101 102 #endif // DataView_h 103