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      1 /*
      2  * Copyright (C) 2011 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 are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef WebArrayBuffer_h
     32 #define WebArrayBuffer_h
     33 
     34 #include "WebCommon.h"
     35 #include "WebPrivatePtr.h"
     36 
     37 namespace v8 {
     38 class Value;
     39 template <class T> class Handle;
     40 }
     41 
     42 namespace WTF { class ArrayBuffer; }
     43 
     44 namespace WebKit {
     45 
     46 class WebArrayBuffer {
     47 public:
     48     ~WebArrayBuffer() { reset(); }
     49 
     50     WebArrayBuffer() { }
     51     WebArrayBuffer(const WebArrayBuffer& b) { assign(b); }
     52     WebArrayBuffer& operator=(const WebArrayBuffer& b)
     53     {
     54         assign(b);
     55         return *this;
     56     }
     57 
     58     WEBKIT_EXPORT static WebArrayBuffer create(unsigned numElements, unsigned elementByteSize);
     59 
     60     WEBKIT_EXPORT void reset();
     61     WEBKIT_EXPORT void assign(const WebArrayBuffer&);
     62 
     63     bool isNull() const { return m_private.isNull(); }
     64     WEBKIT_EXPORT void* data() const;
     65     WEBKIT_EXPORT unsigned byteLength() const;
     66 
     67     WEBKIT_EXPORT v8::Handle<v8::Value> toV8Value();
     68     WEBKIT_EXPORT static WebArrayBuffer* createFromV8Value(v8::Handle<v8::Value>);
     69 
     70 #if WEBKIT_IMPLEMENTATION
     71     WebArrayBuffer(const WTF::PassRefPtr<WTF::ArrayBuffer>&);
     72     WebArrayBuffer& operator=(const PassRefPtr<WTF::ArrayBuffer>&);
     73     operator WTF::PassRefPtr<WTF::ArrayBuffer>() const;
     74 #endif
     75 
     76 protected:
     77     WebPrivatePtr<WTF::ArrayBuffer> m_private;
     78 };
     79 
     80 } // namespace WebKit
     81 
     82 #endif // WebArrayBuffer_h
     83