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43f6aa6846
- This actually works with no changes, I just wasn't 100% convinced and decided to write a test to see if it's true.
103 lines
3.7 KiB
C++
103 lines
3.7 KiB
C++
/*
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tests/test_numpy_array.cpp -- test core array functionality
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Copyright (c) 2016 Ivan Smirnov <i.s.smirnov@gmail.com>
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All rights reserved. Use of this source code is governed by a
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BSD-style license that can be found in the LICENSE file.
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*/
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#include "pybind11_tests.h"
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#include <pybind11/numpy.h>
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#include <pybind11/stl.h>
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#include <cstdint>
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#include <vector>
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using arr = py::array;
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using arr_t = py::array_t<uint16_t, 0>;
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template<typename... Ix> arr data(const arr& a, Ix&&... index) {
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return arr(a.nbytes() - a.offset_at(index...), (const uint8_t *) a.data(index...));
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}
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template<typename... Ix> arr data_t(const arr_t& a, Ix&&... index) {
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return arr(a.size() - a.index_at(index...), a.data(index...));
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}
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arr& mutate_data(arr& a) {
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auto ptr = (uint8_t *) a.mutable_data();
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for (size_t i = 0; i < a.nbytes(); i++)
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ptr[i] = (uint8_t) (ptr[i] * 2);
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return a;
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}
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arr_t& mutate_data_t(arr_t& a) {
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auto ptr = a.mutable_data();
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for (size_t i = 0; i < a.size(); i++)
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ptr[i]++;
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return a;
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}
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template<typename... Ix> arr& mutate_data(arr& a, Ix&&... index) {
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auto ptr = (uint8_t *) a.mutable_data(index...);
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for (size_t i = 0; i < a.nbytes() - a.offset_at(index...); i++)
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ptr[i] = (uint8_t) (ptr[i] * 2);
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return a;
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}
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template<typename... Ix> arr_t& mutate_data_t(arr_t& a, Ix&&... index) {
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auto ptr = a.mutable_data(index...);
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for (size_t i = 0; i < a.size() - a.index_at(index...); i++)
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ptr[i]++;
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return a;
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}
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template<typename... Ix> size_t index_at(const arr& a, Ix&&... idx) { return a.index_at(idx...); }
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template<typename... Ix> size_t index_at_t(const arr_t& a, Ix&&... idx) { return a.index_at(idx...); }
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template<typename... Ix> size_t offset_at(const arr& a, Ix&&... idx) { return a.offset_at(idx...); }
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template<typename... Ix> size_t offset_at_t(const arr_t& a, Ix&&... idx) { return a.offset_at(idx...); }
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template<typename... Ix> size_t at_t(const arr_t& a, Ix&&... idx) { return a.at(idx...); }
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template<typename... Ix> arr_t& mutate_at_t(arr_t& a, Ix&&... idx) { a.mutable_at(idx...)++; return a; }
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#define def_index_fn(name, type) \
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sm.def(#name, [](type a) { return name(a); }); \
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sm.def(#name, [](type a, int i) { return name(a, i); }); \
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sm.def(#name, [](type a, int i, int j) { return name(a, i, j); }); \
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sm.def(#name, [](type a, int i, int j, int k) { return name(a, i, j, k); });
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test_initializer numpy_array([](py::module &m) {
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auto sm = m.def_submodule("array");
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sm.def("ndim", [](const arr& a) { return a.ndim(); });
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sm.def("shape", [](const arr& a) { return arr(a.ndim(), a.shape()); });
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sm.def("shape", [](const arr& a, size_t dim) { return a.shape(dim); });
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sm.def("strides", [](const arr& a) { return arr(a.ndim(), a.strides()); });
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sm.def("strides", [](const arr& a, size_t dim) { return a.strides(dim); });
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sm.def("writeable", [](const arr& a) { return a.writeable(); });
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sm.def("size", [](const arr& a) { return a.size(); });
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sm.def("itemsize", [](const arr& a) { return a.itemsize(); });
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sm.def("nbytes", [](const arr& a) { return a.nbytes(); });
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sm.def("owndata", [](const arr& a) { return a.owndata(); });
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def_index_fn(data, const arr&);
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def_index_fn(data_t, const arr_t&);
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def_index_fn(index_at, const arr&);
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def_index_fn(index_at_t, const arr_t&);
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def_index_fn(offset_at, const arr&);
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def_index_fn(offset_at_t, const arr_t&);
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def_index_fn(mutate_data, arr&);
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def_index_fn(mutate_data_t, arr_t&);
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def_index_fn(at_t, const arr_t&);
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def_index_fn(mutate_at_t, arr_t&);
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sm.def("make_f_array", [] {
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return py::array_t<float>({ 2, 2 }, { 4, 8 });
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});
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sm.def("make_c_array", [] {
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return py::array_t<float>({ 2, 2 }, { 8, 4 });
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});
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});
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