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Fri, Nov 15, 08:54

pybind11_akantu.cc
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/**
* @file pybind11_akantu.cc
*
* @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 "pybind11_akantu.hh"
/* -------------------------------------------------------------------------- */
#include <pybind11/numpy.h>
#include <pybind11/pybind11.h>
/* -------------------------------------------------------------------------- */
namespace py = pybind11;
namespace akantu {
PYBIND11_MODULE(aka_test, m) {
m.doc() = "Module for the tests of akantu";
py::class_<ArrayProxy<Real>>(m, "ArrayProxy", py::buffer_protocol())
.def_buffer([](ArrayProxy<Real> & a) {
return py::buffer_info(
a.storage(), /* Pointer to buffer */
sizeof(Real), /* Size of one scalar */
py::format_descriptor<Real>::format(), /* Python struct-style
format descriptor */
2, /* Number of dimensions */
{a.size(), a.getNbComponent()}, /* Buffer dimensions */
{sizeof(Real) *
a.getNbComponent(), /* Strides (in bytes) for each index */
sizeof(Real)});
})
.def(py::init([](py::array & n) {
/* Request a buffer descriptor from Python */
py::buffer_info info = n.request();
/* Some sanity checks ... */
if (info.format != py::format_descriptor<Real>::format())
throw std::runtime_error(
"Incompatible format: expected a double array!");
if (info.ndim != 2)
throw std::runtime_error("Incompatible buffer dimension!");
return std::make_unique<ArrayProxy<Real>>(static_cast<Real *>(info.ptr),
info.shape[0], info.shape[1]);
}));
py::class_<MatrixProxy<Real>>(m, "Matrix", py::buffer_protocol())
.def_buffer([](MatrixProxy<Real> & a) {
return py::buffer_info(
a.storage(), /* Pointer to buffer */
sizeof(Real), /* Size of one scalar */
py::format_descriptor<Real>::format(), /* Python struct-style
format descriptor */
2, /* Number of dimensions */
{a.size(0), a.size(1)}, /* Buffer dimensions */
{sizeof(Real), a.size(0) * sizeof(Real)}
/* Strides (in bytes) for each index */
);
})
.def(py::init([](py::array & n) {
/* Request a buffer descriptor from Python */
py::buffer_info info = n.request();
/* Some sanity checks ... */
if (info.format != py::format_descriptor<Real>::format())
throw std::runtime_error(
"Incompatible format: expected a double array!");
if (info.ndim != 2)
throw std::runtime_error("Incompatible buffer dimension!");
return std::make_unique<MatrixProxy<Real>>(
static_cast<Real *>(info.ptr), info.shape[0], info.shape[1]);
}));
} // Module aka test
} // namespace akantu

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