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      1 /*
      2  * Copyright (C) 2009 Apple 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  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "ArrayBufferView.h"
     28 
     29 #include "ArrayBuffer.h"
     30 
     31 namespace WTF {
     32 
     33 ArrayBufferView::ArrayBufferView(PassRefPtr<ArrayBuffer> buffer,
     34                        unsigned byteOffset)
     35         : m_byteOffset(byteOffset)
     36         , m_isNeuterable(true)
     37         , m_buffer(buffer)
     38         , m_prevView(0)
     39         , m_nextView(0)
     40 {
     41     m_baseAddress = m_buffer ? (static_cast<char*>(m_buffer->data()) + m_byteOffset) : 0;
     42     if (m_buffer)
     43         m_buffer->addView(this);
     44 }
     45 
     46 ArrayBufferView::~ArrayBufferView()
     47 {
     48     if (m_buffer)
     49         m_buffer->removeView(this);
     50 }
     51 
     52 void ArrayBufferView::neuter()
     53 {
     54     m_buffer = 0;
     55     m_byteOffset = 0;
     56 }
     57 
     58 const char* ArrayBufferView::typeName()
     59 {
     60     switch (getType()) {
     61     case TypeInt8:
     62         return "Int8";
     63         break;
     64     case TypeUint8:
     65         return "UInt8";
     66         break;
     67     case TypeUint8Clamped:
     68         return "UInt8Clamped";
     69         break;
     70     case TypeInt16:
     71         return "Int16";
     72         break;
     73     case TypeUint16:
     74         return "UInt16";
     75         break;
     76     case TypeInt32:
     77         return "Int32";
     78         break;
     79     case TypeUint32:
     80         return "Uint32";
     81         break;
     82     case TypeFloat32:
     83         return "Float32";
     84         break;
     85     case TypeFloat64:
     86         return "Float64";
     87         break;
     88     case TypeDataView:
     89         return "DataView";
     90         break;
     91     }
     92     ASSERT_NOT_REACHED();
     93     return "Unknown";
     94 }
     95 
     96 }
     97