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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkNumericTraitsArrayPixel_h
#define itkNumericTraitsArrayPixel_h
#include "itkNumericTraits.h"
#include "itkArray.h"
namespace itk
{
/** \brief NumericTraits for Array
* \tparam T type of the array component
*/
template <typename T>
class NumericTraits<Array<T>>
{
private:
using ElementAbsType = typename NumericTraits<T>::AbsType;
using ElementAccumulateType = typename NumericTraits<T>::AccumulateType;
using ElementFloatType = typename NumericTraits<T>::FloatType;
using ElementPrintType = typename NumericTraits<T>::PrintType;
using ElementRealType = typename NumericTraits<T>::RealType;
public:
/** Return the type of the native component type. */
using ValueType = T;
using Self = Array<T>;
/** Unsigned component type */
using AbsType = Array<ElementAbsType>;
/** Accumulation of addition and multiplication. */
using AccumulateType = Array<ElementAccumulateType>;
/** Typedef for operations that use floating point instead of real precision
*/
using FloatType = Array<ElementFloatType>;
/** Return the type that can be printed. */
using PrintType = Array<ElementPrintType>;
/** Type for real-valued scalar operations. */
using RealType = Array<ElementRealType>;
/** Type for real-valued scalar operations. */
using ScalarRealType = ElementRealType;
/** Measurement vector type */
using MeasurementVectorType = Self;
/** Component wise defined element
*
* \note minimum value for floating pointer types is defined as
* minimum positive normalize value.
*/
static const Self
max(const Self & a)
{
Self b(a.Size());
b.Fill(NumericTraits<T>::max());
return b;
}
static const Self
min(const Self & a)
{
Self b(a.Size());
b.Fill(NumericTraits<T>::min());
return b;
}
static const Self
ZeroValue(const Self & a)
{
Self b(a.Size());
b.Fill(T{});
return b;
}
static const Self
OneValue(const Self & a)
{
Self b(a.Size());
b.Fill(NumericTraits<T>::OneValue());
return b;
}
static const Self
NonpositiveMin(const Self & a)
{
Self b(a.Size());
b.Fill(NumericTraits<T>::NonpositiveMin());
return b;
}
static constexpr bool IsSigned = std::is_signed_v<ValueType>;
static constexpr bool IsInteger = std::is_integral_v<ValueType>;
static constexpr bool IsComplex = NumericTraits<ValueType>::IsComplex;
/** Set the length of the input array and fill it with zeros. */
static void
SetLength(Array<T> & m, const unsigned int s)
{
m.SetSize(s);
m.Fill(T{});
}
/** Get the length of the input array. */
static size_t
GetLength(const Array<T> & m)
{
return m.GetSize();
}
static void
AssignToArray(const Self & v, MeasurementVectorType & mv)
{
mv = v;
}
template <typename TArray>
static void
AssignToArray(const Self & v, TArray & mv)
{
for (unsigned int i = 0; i < GetLength(v); ++i)
{
mv[i] = v[i];
}
}
};
} // end namespace itk
#endif // itkNumericTraitsArrayPixel_h
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