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/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TypedArrayAdaptors_h
#define TypedArrayAdaptors_h
#include "JSCJSValue.h"
#include "MathCommon.h"
#include "TypedArrayType.h"
#include <wtf/MathExtras.h>
namespace JSC {
template<
typename TypeArg, typename ViewTypeArg, typename JSViewTypeArg,
TypedArrayType typeValueArg>
struct IntegralTypedArrayAdaptor {
typedef TypeArg Type;
typedef ViewTypeArg ViewType;
typedef JSViewTypeArg JSViewType;
static const TypedArrayType typeValue = typeValueArg;
static JSValue toJSValue(Type value)
{
return jsNumber(value);
}
static double toDouble(Type value)
{
return static_cast<double>(value);
}
static Type toNativeFromInt32(int32_t value)
{
return static_cast<Type>(value);
}
static Type toNativeFromUint32(uint32_t value)
{
return static_cast<Type>(value);
}
static Type toNativeFromDouble(double value)
{
int32_t result = static_cast<int32_t>(value);
if (static_cast<double>(result) != value)
result = toInt32(value);
return static_cast<Type>(result);
}
template<typename OtherAdaptor>
static typename OtherAdaptor::Type convertTo(Type value)
{
if (typeValue == TypeUint32)
return OtherAdaptor::toNativeFromUint32(value);
return OtherAdaptor::toNativeFromInt32(value);
}
};
template<
typename TypeArg, typename ViewTypeArg, typename JSViewTypeArg,
TypedArrayType typeValueArg>
struct FloatTypedArrayAdaptor {
typedef TypeArg Type;
typedef ViewTypeArg ViewType;
typedef JSViewTypeArg JSViewType;
static const TypedArrayType typeValue = typeValueArg;
static JSValue toJSValue(Type value)
{
return jsDoubleNumber(purifyNaN(value));
}
static double toDouble(Type value)
{
return static_cast<double>(value);
}
static Type toNativeFromInt32(int32_t value)
{
return static_cast<Type>(value);
}
static Type toNativeFromUint32(uint32_t value)
{
return static_cast<Type>(value);
}
static Type toNativeFromDouble(double value)
{
return value;
}
template<typename OtherAdaptor>
static typename OtherAdaptor::Type convertTo(Type value)
{
return OtherAdaptor::toNativeFromDouble(value);
}
};
struct Int8Adaptor;
struct Int16Adaptor;
struct Int32Adaptor;
struct Uint8Adaptor;
struct Uint8ClampedAdaptor;
struct Uint16Adaptor;
struct Uint32Adaptor;
struct Float32Adaptor;
struct Float64Adaptor;
template<typename Adaptor> class GenericTypedArrayView;
typedef GenericTypedArrayView<Int8Adaptor> Int8Array;
typedef GenericTypedArrayView<Int16Adaptor> Int16Array;
typedef GenericTypedArrayView<Int32Adaptor> Int32Array;
typedef GenericTypedArrayView<Uint8Adaptor> Uint8Array;
typedef GenericTypedArrayView<Uint8ClampedAdaptor> Uint8ClampedArray;
typedef GenericTypedArrayView<Uint16Adaptor> Uint16Array;
typedef GenericTypedArrayView<Uint32Adaptor> Uint32Array;
typedef GenericTypedArrayView<Float32Adaptor> Float32Array;
typedef GenericTypedArrayView<Float64Adaptor> Float64Array;
template<typename Adaptor> class JSGenericTypedArrayView;
typedef JSGenericTypedArrayView<Int8Adaptor> JSInt8Array;
typedef JSGenericTypedArrayView<Int16Adaptor> JSInt16Array;
typedef JSGenericTypedArrayView<Int32Adaptor> JSInt32Array;
typedef JSGenericTypedArrayView<Uint8Adaptor> JSUint8Array;
typedef JSGenericTypedArrayView<Uint8ClampedAdaptor> JSUint8ClampedArray;
typedef JSGenericTypedArrayView<Uint16Adaptor> JSUint16Array;
typedef JSGenericTypedArrayView<Uint32Adaptor> JSUint32Array;
typedef JSGenericTypedArrayView<Float32Adaptor> JSFloat32Array;
typedef JSGenericTypedArrayView<Float64Adaptor> JSFloat64Array;
struct Int8Adaptor : IntegralTypedArrayAdaptor<int8_t, Int8Array, JSInt8Array, TypeInt8> { };
struct Int16Adaptor : IntegralTypedArrayAdaptor<int16_t, Int16Array, JSInt16Array, TypeInt16> { };
struct Int32Adaptor : IntegralTypedArrayAdaptor<int32_t, Int32Array, JSInt32Array, TypeInt32> { };
struct Uint8Adaptor : IntegralTypedArrayAdaptor<uint8_t, Uint8Array, JSUint8Array, TypeUint8> { };
struct Uint16Adaptor : IntegralTypedArrayAdaptor<uint16_t, Uint16Array, JSUint16Array, TypeUint16> { };
struct Uint32Adaptor : IntegralTypedArrayAdaptor<uint32_t, Uint32Array, JSUint32Array, TypeUint32> { };
struct Float32Adaptor : FloatTypedArrayAdaptor<float, Float32Array, JSFloat32Array, TypeFloat32> { };
struct Float64Adaptor : FloatTypedArrayAdaptor<double, Float64Array, JSFloat64Array, TypeFloat64> { };
struct Uint8ClampedAdaptor {
typedef uint8_t Type;
typedef Uint8ClampedArray ViewType;
typedef JSUint8ClampedArray JSViewType;
static const TypedArrayType typeValue = TypeUint8Clamped;
static JSValue toJSValue(uint8_t value)
{
return jsNumber(value);
}
static double toDouble(uint8_t value)
{
return static_cast<double>(value);
}
static Type toNativeFromInt32(int32_t value)
{
return clamp(value);
}
static Type toNativeFromUint32(uint32_t value)
{
return std::min(static_cast<uint32_t>(255), value);
}
static Type toNativeFromDouble(double value)
{
if (std::isnan(value) || value < 0)
return 0;
if (value > 255)
return 255;
return static_cast<uint8_t>(lrint(value));
}
template<typename OtherAdaptor>
static typename OtherAdaptor::Type convertTo(uint8_t value)
{
return OtherAdaptor::toNativeFromInt32(value);
}
private:
static uint8_t clamp(int32_t value)
{
if (value < 0)
return 0;
if (value > 255)
return 255;
return static_cast<uint8_t>(value);
}
};
} // namespace JSC
#endif // TypedArrayAdaptors_h
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