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/* Copyright (c) 2008-2022 the MRtrix3 contributors.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Covered Software is provided under this License on an "as is"
* basis, without warranty of any kind, either expressed, implied, or
* statutory, including, without limitation, warranties that the
* Covered Software is free of defects, merchantable, fit for a
* particular purpose or non-infringing.
* See the Mozilla Public License v. 2.0 for more details.
*
* For more details, see http://www.mrtrix.org/.
*/
#ifndef __algo_iterator_h__
#define __algo_iterator_h__
#include "types.h"
namespace MR
{
/** \defgroup loop Looping functions
@{ */
//! a dummy image to iterate over, useful for multi-threaded looping.
class Iterator { NOMEMALIGN
public:
Iterator() = delete;
template <class InfoType>
Iterator (const InfoType& S) :
d (S.ndim()),
p (S.ndim(), 0) {
for (size_t i = 0; i < S.ndim(); ++i)
d[i] = S.size(i);
}
size_t ndim () const { return d.size(); }
ssize_t size (size_t axis) const { return d[axis]; }
const ssize_t& index (size_t axis) const { return p[axis]; }
ssize_t& index (size_t axis) { return p[axis]; }
friend std::ostream& operator<< (std::ostream& stream, const Iterator& V) {
stream << "iterator, position [ ";
for (size_t n = 0; n < V.ndim(); ++n)
stream << V.index(n) << " ";
stream << "]";
return stream;
}
private:
vector<ssize_t> d, p;
void value () const { assert (0); }
};
//! @}
}
#endif
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