third_party/WebKit/Source/wtf/Float64Array.h

   1 /*
   2  * Copyright (C) 2011 Apple Inc. All rights reserved.
   3  * Copyright (C) 2011 Google Inc. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #ifndef Float64Array_h
  28 #define Float64Array_h
  29
  30 #include "wtf/TypedArrayBase.h"
  31 #include "wtf/MathExtras.h"
  32
  33 namespace WTF {
  34
  35 class Float64Array final : public TypedArrayBase<double> {
  36 public:
  37     static inline PassRefPtr<Float64Array> create(unsigned length);
  38     static inline PassRefPtr<Float64Array> create(const double* array, unsigned length);
  39     static inline PassRefPtr<Float64Array> create(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned length);
  40
  41     // Should only be used when it is known the entire array will be filled. Do
  42     // not return these results directly to JavaScript without filling first.
  43     static inline PassRefPtr<Float64Array> createUninitialized(unsigned length);
  44
  45     using TypedArrayBase<double>::set;
  46
  47     void set(unsigned index, double value)
  48     {
  49         if (index >= TypedArrayBase<double>::m_length)
  50             return;
  51         TypedArrayBase<double>::data()[index] = static_cast<double>(value);
  52     }
  53
  54     ViewType type() const override
  55     {
  56         return TypeFloat64;
  57     }
  58
  59 private:
  60     inline Float64Array(PassRefPtr<ArrayBuffer>,
  61                  unsigned byteOffset,
  62                  unsigned length);
  63     // Make constructor visible to superclass.
  64     friend class TypedArrayBase<double>;
  65 };
  66
  67 PassRefPtr<Float64Array> Float64Array::create(unsigned length)
  68 {
  69     return TypedArrayBase<double>::create<Float64Array>(length);
  70 }
  71
  72 PassRefPtr<Float64Array> Float64Array::create(const double* array, unsigned length)
  73 {
  74     return TypedArrayBase<double>::create<Float64Array>(array, length);
  75 }
  76
  77 PassRefPtr<Float64Array> Float64Array::create(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length)
  78 {
  79     return TypedArrayBase<double>::create<Float64Array>(buffer, byteOffset, length);
  80 }
  81
  82 Float64Array::Float64Array(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length)
  83     : TypedArrayBase<double>(buffer, byteOffset, length)
  84 {
  85 }
  86
  87 } // namespace WTF
  88
  89 using WTF::Float64Array;
  90
  91 #endif // Float64Array_h