third_party/WebKit/Source/wtf/ArrayBufferView.cpp

   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 = nullptr;
  55     m_byteOffset = 0;
  56 }
  57
  58 const char* ArrayBufferView::typeName()
  59 {
  60     switch (type()) {
  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 }