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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef ArrayPiece_h | 5 #include "platform/wtf/typed_arrays/ArrayPiece.h" |
| 6 #define ArrayPiece_h | |
| 7 | 6 |
| 8 #include "wtf/Allocator.h" | 7 // The contents of this header was moved to platform/wtf as part of |
| 9 #include "wtf/Forward.h" | 8 // WTF migration project. See the following post for details: |
| 10 #include "wtf/WTFExport.h" | 9 // https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gY
CAAJ |
| 11 | |
| 12 namespace WTF { | |
| 13 | |
| 14 // This class is for passing around un-owned bytes as a pointer + length. | |
| 15 // It supports implicit conversion from several other data types. | |
| 16 // | |
| 17 // ArrayPiece has the concept of being "null". This is different from an empty | |
| 18 // byte range. It is invalid to call methods other than isNull() on such | |
| 19 // instances. | |
| 20 // | |
| 21 // IMPORTANT: The data contained by ArrayPiece is NOT OWNED, so caution must be | |
| 22 // taken to ensure it is kept alive. | |
| 23 class WTF_EXPORT ArrayPiece { | |
| 24 DISALLOW_NEW(); | |
| 25 | |
| 26 public: | |
| 27 // Constructs a "null" ArrayPiece object. | |
| 28 ArrayPiece(); | |
| 29 | |
| 30 ArrayPiece(void* data, unsigned byteLength); | |
| 31 | |
| 32 // Constructs an ArrayPiece from the given ArrayBuffer. If the input is a | |
| 33 // nullptr, then the constructed instance will be isNull(). | |
| 34 ArrayPiece(ArrayBuffer*); | |
| 35 ArrayPiece(ArrayBufferView*); | |
| 36 | |
| 37 bool isNull() const; | |
| 38 void* data() const; | |
| 39 unsigned char* bytes() const; | |
| 40 unsigned byteLength() const; | |
| 41 | |
| 42 protected: | |
| 43 void initWithData(void* data, unsigned byteLength); | |
| 44 | |
| 45 private: | |
| 46 void initNull(); | |
| 47 | |
| 48 void* m_data; | |
| 49 unsigned m_byteLength; | |
| 50 bool m_isNull; | |
| 51 }; | |
| 52 | |
| 53 } // namespace WTF | |
| 54 | |
| 55 using WTF::ArrayPiece; | |
| 56 | |
| 57 #endif // ArrayPiece_h | |
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