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pybind11_akantu.hh
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/**
* @file pybind11_akantu.hh
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri Dec 22 2017
* @date last modification: Thu Dec 28 2017
*
* @brief tool to wrap akantu classes in python
*
* @section LICENSE
*
* Copyright (©) 2016-2018 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"
#include "aka_types.hh"
/* -------------------------------------------------------------------------- */
#include <pybind11/cast.h>
#include <pybind11/numpy.h>
#include <pybind11/pybind11.h>
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_PYBIND11_AKANTU_HH__
#define __AKANTU_PYBIND11_AKANTU_HH__
namespace akantu {
template <typename T> class ArrayProxy : public Array<T> {
public:
ArrayProxy(T * wrapped_memory, UInt size = 0, UInt nb_component = 1,
const ID & id = "")
: Array<T>(0, nb_component, id) {
this->values = wrapped_memory;
this->size_ = size;
}
ArrayProxy(const ArrayProxy<T> & array)
: Array<T>(0, array.nb_component, array.id) {
this->values = array.values;
this->size_ = array.size_;
}
ArrayProxy(ArrayProxy<T> && array) {
this->nb_component = std::move(array.nb_component);
this->values = std::move(array.values);
this->size_ = std::move(array.size_);
this->id = std::move(array.id);
}
ArrayProxy(Array<T> & array)
: Array<T>(0, array.getNbComponent(), array.getID()) {
this->values = array.storage();
this->size_ = array.size();
}
~ArrayProxy() {
this->values = nullptr;
this->size_ = 0;
}
void setNbComponent(UInt nb_component) {
UInt new_size = this->size_ / nb_component;
AKANTU_DEBUG_ASSERT(
nb_component * new_size == this->nb_component * this->size_,
nb_component
<< " is not valid as a new number of component for this array");
this->nb_component = nb_component;
this->size_ = new_size;
}
void resize(UInt new_size) {
AKANTU_DEBUG_ASSERT(this->size_ == new_size,
"cannot resize a temporary vector");
}
};
template <typename T> decltype(auto) make_proxy(Array<T> & array) {
return ArrayProxy<T>(array);
}
template <typename T> decltype(auto) make_proxy(const Matrix<T> & array) {
return MatrixProxy<T>(array);
}
} // namespace akantu
// namespace pybind11 {
// namespace detail {
// template <> struct type_caster<akantu::ArrayProxy<akantu::Real>> {
// public:
// PYBIND11_TYPE_CASTER(akantu::ArrayProxy<akantu::Real>, _("ArrayProxy"));
// bool load(handle, bool) {
// // /* Extract PyObject from handle */
// // PyObject *source = src.ptr();
// // /* Try converting into a Python integer value */
// // PyObject *tmp = PyNumber_Long(source);
// // if (!tmp)
// // return false;
// // /* Now try to convert into a C++ int */
// // value.long_value = PyLong_AsLong(tmp);
// // Py_DECREF(tmp);
// // /* Ensure return code was OK (to avoid out-of-range errors etc) */
// // return !(value.long_value == -1 && !PyErr_Occurred());
// return false;
// }
// static handle cast(akantu::ArrayProxy<akantu::Real> & src,
// return_value_policy /* policy */, handle parent) {
// constexpr ssize_t elem_size = sizeof(akantu::Real);
// ssize_t nb_comp = src.getNbComponent();
// ssize_t size = src.size();
// std::cout << "<memory at " << reinterpret_cast<void *>(src.storage())
// << ">\n";
// auto a = array({size, nb_comp}, {elem_size * nb_comp, elem_size},
// src.storage(), handle());
// return a.release();
// }
// };
// } // namespace detail
// } // namespace pybind11
#endif /* __AKANTU_PYBIND11_AKANTU_HH__ */

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