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/*
tests/test_numpy_array.cpp -- test core array functionality
Copyright (c) 2016 Ivan Smirnov <i.s.smirnov@gmail.com>
All rights reserved. Use of this source code is governed by a
BSD-style license that can be found in the LICENSE file.
*/
#include "pybind11_tests.h"
#include <pybind11/numpy.h>
#include <pybind11/stl.h>
#include <cstdint>
#include <vector>
using arr = py::array;
using arr_t = py::array_t<uint16_t, 0>;
template<typename... Ix> arr data(const arr& a, Ix... index) {
return arr(a.nbytes() - a.offset_at(index...), (const uint8_t *) a.data(index...));
}
template<typename... Ix> arr data_t(const arr_t& a, Ix... index) {
return arr(a.size() - a.index_at(index...), a.data(index...));
}
arr& mutate_data(arr& a) {
auto ptr = (uint8_t *) a.mutable_data();
for (size_t i = 0; i < a.nbytes(); i++)
ptr[i] = (uint8_t) (ptr[i] * 2);
return a;
}
arr_t& mutate_data_t(arr_t& a) {
auto ptr = a.mutable_data();
for (size_t i = 0; i < a.size(); i++)
ptr[i]++;
return a;
}
template<typename... Ix> arr& mutate_data(arr& a, Ix... index) {
auto ptr = (uint8_t *) a.mutable_data(index...);
for (size_t i = 0; i < a.nbytes() - a.offset_at(index...); i++)
ptr[i] = (uint8_t) (ptr[i] * 2);
return a;
}
template<typename... Ix> arr_t& mutate_data_t(arr_t& a, Ix... index) {
auto ptr = a.mutable_data(index...);
for (size_t i = 0; i < a.size() - a.index_at(index...); i++)
ptr[i]++;
return a;
}
template<typename... Ix> size_t index_at(const arr& a, Ix... idx) { return a.index_at(idx...); }
template<typename... Ix> size_t index_at_t(const arr_t& a, Ix... idx) { return a.index_at(idx...); }
template<typename... Ix> size_t offset_at(const arr& a, Ix... idx) { return a.offset_at(idx...); }
template<typename... Ix> size_t offset_at_t(const arr_t& a, Ix... idx) { return a.offset_at(idx...); }
template<typename... Ix> size_t at_t(const arr_t& a, Ix... idx) { return a.at(idx...); }
template<typename... Ix> arr_t& mutate_at_t(arr_t& a, Ix... idx) { a.mutable_at(idx...)++; return a; }
#define def_index_fn(name, type) \
sm.def(#name, [](type a) { return name(a); }); \
sm.def(#name, [](type a, int i) { return name(a, i); }); \
sm.def(#name, [](type a, int i, int j) { return name(a, i, j); }); \
sm.def(#name, [](type a, int i, int j, int k) { return name(a, i, j, k); });
test_initializer numpy_array([](py::module &m) {
auto sm = m.def_submodule("array");
sm.def("ndim", [](const arr& a) { return a.ndim(); });
sm.def("shape", [](const arr& a) { return arr(a.ndim(), a.shape()); });
sm.def("shape", [](const arr& a, size_t dim) { return a.shape(dim); });
sm.def("strides", [](const arr& a) { return arr(a.ndim(), a.strides()); });
sm.def("strides", [](const arr& a, size_t dim) { return a.strides(dim); });
sm.def("writeable", [](const arr& a) { return a.writeable(); });
sm.def("size", [](const arr& a) { return a.size(); });
sm.def("itemsize", [](const arr& a) { return a.itemsize(); });
sm.def("nbytes", [](const arr& a) { return a.nbytes(); });
sm.def("owndata", [](const arr& a) { return a.owndata(); });
def_index_fn(data, const arr&);
def_index_fn(data_t, const arr_t&);
def_index_fn(index_at, const arr&);
def_index_fn(index_at_t, const arr_t&);
def_index_fn(offset_at, const arr&);
def_index_fn(offset_at_t, const arr_t&);
def_index_fn(mutate_data, arr&);
def_index_fn(mutate_data_t, arr_t&);
def_index_fn(at_t, const arr_t&);
def_index_fn(mutate_at_t, arr_t&);
sm.def("make_f_array", [] {
return py::array_t<float>({ 2, 2 }, { 4, 8 });
});
sm.def("make_c_array", [] {
return py::array_t<float>({ 2, 2 }, { 8, 4 });
});
sm.def("wrap", [](py::array a) {
return py::array(
a.dtype(),
std::vector<size_t>(a.shape(), a.shape() + a.ndim()),
std::vector<size_t>(a.strides(), a.strides() + a.ndim()),
a.data(),
a
);
});
struct ArrayClass {
int data[2] = { 1, 2 };
ArrayClass() { py::print("ArrayClass()"); }
~ArrayClass() { py::print("~ArrayClass()"); }
};
py::class_<ArrayClass>(sm, "ArrayClass")
.def(py::init<>())
.def("numpy_view", [](py::object &obj) {
py::print("ArrayClass::numpy_view()");
ArrayClass &a = obj.cast<ArrayClass&>();
return py::array_t<int>({2}, {4}, a.data, obj);
}
);
sm.def("function_taking_uint64", [](uint64_t) { });
sm.def("isinstance_untyped", [](py::object yes, py::object no) {
return py::isinstance<py::array>(yes) && !py::isinstance<py::array>(no);
});
sm.def("isinstance_typed", [](py::object o) {
return py::isinstance<py::array_t<double>>(o) && !py::isinstance<py::array_t<int>>(o);
});
sm.def("default_constructors", []() {
return py::dict(
"array"_a=py::array(),
"array_t<int32>"_a=py::array_t<std::int32_t>(),
"array_t<double>"_a=py::array_t<double>()
);
});
sm.def("converting_constructors", [](py::object o) {
return py::dict(
"array"_a=py::array(o),
"array_t<int32>"_a=py::array_t<std::int32_t>(o),
"array_t<double>"_a=py::array_t<double>(o)
);
});
});
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