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// Copyright Jim Bosch & Ankit Daftery 2010-2012.

// Copyright Stefan Seefeld 2016.

// Distributed under the Boost Software License, Version 1.0.

// (See accompanying file LICENSE_1_0.txt or copy at

// http://www.boost.org/LICENSE_1_0.txt)

#include <boost/python/numpy.hpp>

namespace p = boost::python;

namespace np = boost::python::numpy;

np::ndarray zeros(p::tuple shape, np::dtype dt) { return np::zeros(shape, dt);}

np::ndarray array2(p::object obj, np::dtype dt) { return np::array(obj,dt);}

np::ndarray array1(p::object obj) { return np::array(obj);}

np::ndarray empty1(p::tuple shape, np::dtype dt) { return np::empty(shape,dt);}

np::ndarray c_empty(p::tuple shape, np::dtype dt)

{

// convert 'shape' to a C array so we can test the corresponding

// version of the constructor

unsigned len = p::len(shape);

Py_intptr_t *c_shape = new Py_intptr_t[len];

for (unsigned i = 0; i != len; ++i)

c_shape[i] = p::extract<Py_intptr_t>(shape[i]);

np::ndarray result = np::empty(len, c_shape, dt);

delete [] c_shape;

return result;

}

np::ndarray transpose(np::ndarray arr) { return arr.transpose();}

np::ndarray squeeze(np::ndarray arr) { return arr.squeeze();}

np::ndarray reshape(np::ndarray arr,p::tuple tup) { return arr.reshape(tup);}

Py_intptr_t shape_index(np::ndarray arr,int k) { return arr.shape(k); }

Py_intptr_t strides_index(np::ndarray arr,int k) { return arr.strides(k); }

BOOST_PYTHON_MODULE(ndarray_ext)

{

np::initialize();

p::def("zeros", zeros);

p::def("zeros_matrix", zeros, np::as_matrix<>());

p::def("array", array2);

p::def("array", array1);

p::def("empty", empty1);

p::def("c_empty", c_empty);

p::def("transpose", transpose);

p::def("squeeze", squeeze);

p::def("reshape", reshape);

p::def("shape_index", shape_index);

p::def("strides_index", strides_index);

}