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pybind11_akantu.hh
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Mon, Aug 19, 23:42
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rAKA akantu
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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