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rAKA/src/common/aka_array_filter.hh
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aka_array_filter.hh
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/**
* @file aka_array.hh
*
* @author Till Junge <till.junge@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Tue Jan 16 2018
*
* @brief Array container for Akantu
* This container differs from the std::vector from the fact it as 2 dimensions
* a main dimension and the size stored per entries
*
*
* Copyright (©) 2010-2018 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "aka_array.hh"
/* -------------------------------------------------------------------------- */
#ifndef AKANTU_ARRAY_FILTER_HH_
#define AKANTU_ARRAY_FILTER_HH_
namespace akantu {
/* -------------------------------------------------------------------------- */
/* ArrayFilter */
/* -------------------------------------------------------------------------- */
template <typename T> class ArrayFilter {
/* ------------------------------------------------------------------------ */
/* Typedefs */
/* ------------------------------------------------------------------------ */
public:
/// standard iterator
template <typename R = T> class iterator {
inline bool operator!=(__attribute__((unused)) iterator<R> & other) {
throw;
};
inline bool operator==(__attribute__((unused)) iterator<R> & other) {
throw;
};
inline iterator<R> & operator++() { throw; };
inline T operator*() {
throw;
return T();
};
};
/// const iterator
template <template <class S> class original_iterator, typename Shape,
typename filter_iterator>
class const_iterator {
public:
UInt getCurrentIndex() {
return (*this->filter_it * this->nb_item_per_elem +
this->sub_element_counter);
}
inline const_iterator() = default;
inline const_iterator(const original_iterator<Shape> & origin_it,
const filter_iterator & filter_it,
UInt nb_item_per_elem)
: origin_it(origin_it), filter_it(filter_it),
nb_item_per_elem(nb_item_per_elem), sub_element_counter(0){};
inline bool operator!=(const_iterator & other) const {
return !((*this) == other);
}
inline bool operator==(const_iterator & other) const {
return (this->origin_it == other.origin_it &&
this->filter_it == other.filter_it &&
this->sub_element_counter == other.sub_element_counter);
}
inline bool operator!=(const const_iterator & other) const {
return !((*this) == other);
}
inline bool operator==(const const_iterator & other) const {
return (this->origin_it == other.origin_it &&
this->filter_it == other.filter_it &&
this->sub_element_counter == other.sub_element_counter);
}
inline const_iterator & operator++() {
++sub_element_counter;
if (sub_element_counter == nb_item_per_elem) {
sub_element_counter = 0;
++filter_it;
}
return *this;
};
inline Shape operator*() {
return origin_it[nb_item_per_elem * (*filter_it) + sub_element_counter];
};
private:
original_iterator<Shape> origin_it;
filter_iterator filter_it;
/// the number of item per element
UInt nb_item_per_elem;
/// counter for every sub element group
UInt sub_element_counter;
};
using vector_iterator = iterator<Vector<T>>;
using array_type = Array<T>;
using const_vector_iterator =
const_iterator<array_type::template const_iterator, Vector<T>,
Array<UInt>::const_iterator<UInt>>;
using value_type = typename array_type::value_type;
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
ArrayFilter(const Array<T> & array, const Array<UInt> & filter,
UInt nb_item_per_elem)
: array(array), filter(filter), nb_item_per_elem(nb_item_per_elem){};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
const_vector_iterator begin_reinterpret(UInt n, UInt new_size) const {
AKANTU_DEBUG_ASSERT(
n * new_size == this->getNbComponent() * this->size(),
"The new values for size ("
<< new_size << ") and nb_component (" << n
<< ") are not compatible with the one of this array("
<< this->size() << "," << this->getNbComponent() << ")");
UInt new_full_array_size = this->array.size() * array.getNbComponent() / n;
UInt new_nb_item_per_elem = this->nb_item_per_elem;
if (new_size != 0 && n != 0) {
new_nb_item_per_elem = this->array.getNbComponent() *
this->filter.size() * this->nb_item_per_elem /
(n * new_size);
}
return const_vector_iterator(
this->array.begin_reinterpret(n, new_full_array_size),
this->filter.begin(), new_nb_item_per_elem);
};
const_vector_iterator end_reinterpret(UInt n, UInt new_size) const {
AKANTU_DEBUG_ASSERT(
n * new_size == this->getNbComponent() * this->size(),
"The new values for size ("
<< new_size << ") and nb_component (" << n
<< ") are not compatible with the one of this array("
<< this->size() << "," << this->getNbComponent() << ")");
UInt new_full_array_size =
this->array.size() * this->array.getNbComponent() / n;
UInt new_nb_item_per_elem = this->nb_item_per_elem;
if (new_size != 0 && n != 0) {
new_nb_item_per_elem = this->array.getNbComponent() *
this->filter.size() * this->nb_item_per_elem /
(n * new_size);
}
return const_vector_iterator(
this->array.begin_reinterpret(n, new_full_array_size),
this->filter.end(), new_nb_item_per_elem);
};
vector_iterator begin_reinterpret(UInt /*unused*/, UInt /*unused*/) {
throw;
};
vector_iterator end_reinterpret(UInt /*unused*/, UInt /*unused*/) { throw; };
/// return the size of the filtered array which is the filter size
UInt size() const { return this->filter.size() * this->nb_item_per_elem; };
/// the number of components of the filtered array
UInt getNbComponent() const { return this->array.getNbComponent(); };
bool empty() const __attribute__((warn_unused_result)) {
return (size() == 0);
}
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
private:
/// reference to array of data
const Array<T> & array;
/// reference to the filter used to select elements
const Array<UInt> & filter;
/// the number of item per element
UInt nb_item_per_elem;
};
} // namespace akantu
#endif // AKANTU_ARRAY_FILTER_HH_
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