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vtkTypedDataArrayIterator.h
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vtkTypedDataArrayIterator.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTypedDataArrayIterator.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/**
* @class vtkTypedDataArrayIterator
* @brief STL-style random access iterator for
* vtkTypedDataArrays.
*
*
* vtkTypedDataArrayIterator provides an STL-style iterator that can be used to
* interact with instances of vtkTypedDataArray. It is intended to provide an
* alternative to using vtkDataArray::GetVoidPointer() that only uses
* vtkTypedDataArray API functions to retrieve values. It is especially helpful
* for safely iterating through subclasses of vtkMappedDataArray, which may
* not use the same memory layout as a typical vtkDataArray.
*
* NOTE: This class has been superceded by the newer vtkGenericDataArray and
* vtkArrayDispatch mechanism.
*/
#ifndef vtkTypedDataArrayIterator_h
#define vtkTypedDataArrayIterator_h
#include <iterator> // For iterator traits
#include "vtkTypedDataArray.h" // For vtkTypedDataArray
template<class Scalar>
class vtkTypedDataArrayIterator
{
public:
typedef std::random_access_iterator_tag iterator_category;
typedef Scalar value_type;
typedef std::ptrdiff_t difference_type;
typedef Scalar& reference;
typedef Scalar* pointer;
vtkTypedDataArrayIterator()
: Data(NULL), Index(0) {}
explicit vtkTypedDataArrayIterator(vtkTypedDataArray<Scalar> *arr,
const vtkIdType index = 0)
: Data(arr),
Index(index)
{
}
vtkTypedDataArrayIterator(const vtkTypedDataArrayIterator &o)
: Data(o.Data),
Index(o.Index)
{
}
vtkTypedDataArrayIterator&
operator=(vtkTypedDataArrayIterator<Scalar> o)
{
std::swap(this->Data, o.Data);
std::swap(this->Index, o.Index);
return *this;
}
bool operator==(const vtkTypedDataArrayIterator<Scalar> &o) const
{
return this->Data == o.Data && this->Index == o.Index;
}
bool operator!=(const vtkTypedDataArrayIterator<Scalar> &o) const
{
return this->Data == o.Data && this->Index != o.Index;
}
bool operator>(const vtkTypedDataArrayIterator<Scalar> &o) const
{
return this->Data == o.Data && this->Index > o.Index;
}
bool operator>=(const vtkTypedDataArrayIterator<Scalar> &o) const
{
return this->Data == o.Data && this->Index >= o.Index;
}
bool operator<(const vtkTypedDataArrayIterator<Scalar> &o) const
{
return this->Data == o.Data && this->Index < o.Index;
}
bool operator<=(const vtkTypedDataArrayIterator<Scalar> &o) const
{
return this->Data == o.Data && this->Index <= o.Index;
}
Scalar& operator*()
{
return this->Data->GetValueReference(this->Index);
}
Scalar* operator->() const
{
return &this->Data->GetValueReference(this->Index);
}
Scalar& operator[](const difference_type &n)
{
return this->Data->GetValueReference(this->Index + n);
}
vtkTypedDataArrayIterator& operator++()
{
++this->Index;
return *this;
}
vtkTypedDataArrayIterator& operator--()
{
--this->Index;
return *this;
}
vtkTypedDataArrayIterator operator++(int)
{
return vtkTypedDataArrayIterator(this->Data, this->Index++);
}
vtkTypedDataArrayIterator operator--(int)
{
return vtkTypedDataArrayIterator(this->Data, this->Index--);
}
vtkTypedDataArrayIterator operator+(const difference_type& n) const
{
return vtkTypedDataArrayIterator(this->Data, this->Index + n);
}
vtkTypedDataArrayIterator operator-(const difference_type& n) const
{
return vtkTypedDataArrayIterator(this->Data, this->Index - n);
}
difference_type operator-(const vtkTypedDataArrayIterator& other) const
{
return this->Index - other.Index;
}
vtkTypedDataArrayIterator& operator+=(const difference_type& n)
{
this->Index += n;
return *this;
}
vtkTypedDataArrayIterator& operator-=(const difference_type& n)
{
this->Index -= n;
return *this;
}
private:
vtkTypedDataArray<Scalar> *Data;
vtkIdType Index;
};
#endif // vtkTypedDataArrayIterator_h
// VTK-HeaderTest-Exclude: vtkTypedDataArrayIterator.h