Index: Source/wtf/ArrayPiece.h |
diff --git a/Source/wtf/ArrayPiece.h b/Source/wtf/ArrayPiece.h |
new file mode 100644 |
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+++ b/Source/wtf/ArrayPiece.h |
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+// Copyright 2014 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef ArrayPiece_h |
+#define ArrayPiece_h |
+ |
+#include "wtf/Forward.h" |
+#include "wtf/WTFExport.h" |
+ |
+namespace WTF { |
+ |
+// This class is for passing around un-owned bytes as a pointer + length. |
+// It supports implicit conversion from several other data types. |
+// |
+// ArrayPiece has the concept of being "null". This is different from an empty |
+// byte range. It is invalid to call methods other than isNull() on such |
+// instances. |
+// |
+// IMPORTANT: The data contained by ArrayPiece is NOT OWNED, so caution must be |
+// taken to ensure it is kept alive. |
+class WTF_EXPORT ArrayPiece { |
+public: |
+ // Constructs a "null" ArrayPiece object. |
+ ArrayPiece(); |
+ |
+ ArrayPiece(void* data, unsigned byteLength); |
+ |
+ // Constructs an ArrayPiece from the given ArrayBuffer. If the input is a |
+ // nullptr, then the constructed instance will be isNull(). |
+ ArrayPiece(ArrayBuffer*); |
+ ArrayPiece(ArrayBufferView*); |
+ |
+ bool isNull() const; |
+ void* data() const; |
+ unsigned char* bytes() const; |
+ unsigned byteLength() const; |
+ |
+private: |
+ void initWithData(void* data, unsigned byteLength); |
+ void initNull(); |
+ |
+ void* m_data; |
+ unsigned m_byteLength; |
+ bool m_isNull; |
+}; |
+ |
+} // namespace WTF |
+ |
+using WTF::ArrayPiece; |
+ |
+#endif // ArrayPiece_h |