| /* |
| tests/test_numpy_dtypes.cpp -- Structured and compound NumPy dtypes |
| |
| Copyright (c) 2016 Ivan Smirnov |
| |
| 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> |
| |
| #ifdef __GNUC__ |
| #define PYBIND11_PACKED(cls) cls __attribute__((__packed__)) |
| #else |
| #define PYBIND11_PACKED(cls) __pragma(pack(push, 1)) cls __pragma(pack(pop)) |
| #endif |
| |
| namespace py = pybind11; |
| |
| struct SimpleStruct { |
| bool x; |
| uint32_t y; |
| float z; |
| }; |
| |
| std::ostream& operator<<(std::ostream& os, const SimpleStruct& v) { |
| return os << "s:" << v.x << "," << v.y << "," << v.z; |
| } |
| |
| PYBIND11_PACKED(struct PackedStruct { |
| bool x; |
| uint32_t y; |
| float z; |
| }); |
| |
| std::ostream& operator<<(std::ostream& os, const PackedStruct& v) { |
| return os << "p:" << v.x << "," << v.y << "," << v.z; |
| } |
| |
| PYBIND11_PACKED(struct NestedStruct { |
| SimpleStruct a; |
| PackedStruct b; |
| }); |
| |
| std::ostream& operator<<(std::ostream& os, const NestedStruct& v) { |
| return os << "n:a=" << v.a << ";b=" << v.b; |
| } |
| |
| struct PartialStruct { |
| bool x; |
| uint32_t y; |
| float z; |
| uint64_t dummy2; |
| }; |
| |
| struct PartialNestedStruct { |
| uint64_t dummy1; |
| PartialStruct a; |
| uint64_t dummy2; |
| }; |
| |
| struct UnboundStruct { }; |
| |
| struct StringStruct { |
| char a[3]; |
| std::array<char, 3> b; |
| }; |
| |
| PYBIND11_PACKED(struct StructWithUglyNames { |
| int8_t __x__; |
| uint64_t __y__; |
| }); |
| |
| enum class E1 : int64_t { A = -1, B = 1 }; |
| enum E2 : uint8_t { X = 1, Y = 2 }; |
| |
| PYBIND11_PACKED(struct EnumStruct { |
| E1 e1; |
| E2 e2; |
| }); |
| |
| std::ostream& operator<<(std::ostream& os, const StringStruct& v) { |
| os << "a='"; |
| for (size_t i = 0; i < 3 && v.a[i]; i++) os << v.a[i]; |
| os << "',b='"; |
| for (size_t i = 0; i < 3 && v.b[i]; i++) os << v.b[i]; |
| return os << "'"; |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const EnumStruct& v) { |
| return os << "e1=" << (v.e1 == E1::A ? "A" : "B") << ",e2=" << (v.e2 == E2::X ? "X" : "Y"); |
| } |
| |
| template <typename T> |
| py::array mkarray_via_buffer(size_t n) { |
| return py::array(py::buffer_info(nullptr, sizeof(T), |
| py::format_descriptor<T>::format(), |
| 1, { n }, { sizeof(T) })); |
| } |
| |
| template <typename S> |
| py::array_t<S, 0> create_recarray(size_t n) { |
| auto arr = mkarray_via_buffer<S>(n); |
| auto req = arr.request(); |
| auto ptr = static_cast<S*>(req.ptr); |
| for (size_t i = 0; i < n; i++) { |
| ptr[i].x = i % 2 != 0; ptr[i].y = (uint32_t) i; ptr[i].z = (float) i * 1.5f; |
| } |
| return arr; |
| } |
| |
| std::string get_format_unbound() { |
| return py::format_descriptor<UnboundStruct>::format(); |
| } |
| |
| py::array_t<NestedStruct, 0> create_nested(size_t n) { |
| auto arr = mkarray_via_buffer<NestedStruct>(n); |
| auto req = arr.request(); |
| auto ptr = static_cast<NestedStruct*>(req.ptr); |
| for (size_t i = 0; i < n; i++) { |
| ptr[i].a.x = i % 2 != 0; ptr[i].a.y = (uint32_t) i; ptr[i].a.z = (float) i * 1.5f; |
| ptr[i].b.x = (i + 1) % 2 != 0; ptr[i].b.y = (uint32_t) (i + 1); ptr[i].b.z = (float) (i + 1) * 1.5f; |
| } |
| return arr; |
| } |
| |
| py::array_t<PartialNestedStruct, 0> create_partial_nested(size_t n) { |
| auto arr = mkarray_via_buffer<PartialNestedStruct>(n); |
| auto req = arr.request(); |
| auto ptr = static_cast<PartialNestedStruct*>(req.ptr); |
| for (size_t i = 0; i < n; i++) { |
| ptr[i].a.x = i % 2 != 0; ptr[i].a.y = (uint32_t) i; ptr[i].a.z = (float) i * 1.5f; |
| } |
| return arr; |
| } |
| |
| py::array_t<StringStruct, 0> create_string_array(bool non_empty) { |
| auto arr = mkarray_via_buffer<StringStruct>(non_empty ? 4 : 0); |
| if (non_empty) { |
| auto req = arr.request(); |
| auto ptr = static_cast<StringStruct*>(req.ptr); |
| for (size_t i = 0; i < req.size * req.itemsize; i++) |
| static_cast<char*>(req.ptr)[i] = 0; |
| ptr[1].a[0] = 'a'; ptr[1].b[0] = 'a'; |
| ptr[2].a[0] = 'a'; ptr[2].b[0] = 'a'; |
| ptr[3].a[0] = 'a'; ptr[3].b[0] = 'a'; |
| |
| ptr[2].a[1] = 'b'; ptr[2].b[1] = 'b'; |
| ptr[3].a[1] = 'b'; ptr[3].b[1] = 'b'; |
| |
| ptr[3].a[2] = 'c'; ptr[3].b[2] = 'c'; |
| } |
| return arr; |
| } |
| |
| py::array_t<EnumStruct, 0> create_enum_array(size_t n) { |
| auto arr = mkarray_via_buffer<EnumStruct>(n); |
| auto ptr = (EnumStruct *) arr.mutable_data(); |
| for (size_t i = 0; i < n; i++) { |
| ptr[i].e1 = static_cast<E1>(-1 + ((int) i % 2) * 2); |
| ptr[i].e2 = static_cast<E2>(1 + (i % 2)); |
| } |
| return arr; |
| } |
| |
| template <typename S> |
| py::list print_recarray(py::array_t<S, 0> arr) { |
| const auto req = arr.request(); |
| const auto ptr = static_cast<S*>(req.ptr); |
| auto l = py::list(); |
| for (size_t i = 0; i < req.size; i++) { |
| std::stringstream ss; |
| ss << ptr[i]; |
| l.append(py::str(ss.str())); |
| } |
| return l; |
| } |
| |
| py::list print_format_descriptors() { |
| const auto fmts = { |
| py::format_descriptor<SimpleStruct>::format(), |
| py::format_descriptor<PackedStruct>::format(), |
| py::format_descriptor<NestedStruct>::format(), |
| py::format_descriptor<PartialStruct>::format(), |
| py::format_descriptor<PartialNestedStruct>::format(), |
| py::format_descriptor<StringStruct>::format(), |
| py::format_descriptor<EnumStruct>::format() |
| }; |
| auto l = py::list(); |
| for (const auto &fmt : fmts) { |
| l.append(py::cast(fmt)); |
| } |
| return l; |
| } |
| |
| py::list print_dtypes() { |
| const auto dtypes = { |
| py::dtype::of<SimpleStruct>().str(), |
| py::dtype::of<PackedStruct>().str(), |
| py::dtype::of<NestedStruct>().str(), |
| py::dtype::of<PartialStruct>().str(), |
| py::dtype::of<PartialNestedStruct>().str(), |
| py::dtype::of<StringStruct>().str(), |
| py::dtype::of<EnumStruct>().str(), |
| py::dtype::of<StructWithUglyNames>().str() |
| }; |
| auto l = py::list(); |
| for (const auto &s : dtypes) { |
| l.append(s); |
| } |
| return l; |
| } |
| |
| py::array_t<int32_t, 0> test_array_ctors(int i) { |
| using arr_t = py::array_t<int32_t, 0>; |
| |
| std::vector<int32_t> data { 1, 2, 3, 4, 5, 6 }; |
| std::vector<size_t> shape { 3, 2 }; |
| std::vector<size_t> strides { 8, 4 }; |
| |
| auto ptr = data.data(); |
| auto vptr = (void *) ptr; |
| auto dtype = py::dtype("int32"); |
| |
| py::buffer_info buf_ndim1(vptr, 4, "i", 6); |
| py::buffer_info buf_ndim1_null(nullptr, 4, "i", 6); |
| py::buffer_info buf_ndim2(vptr, 4, "i", 2, shape, strides); |
| py::buffer_info buf_ndim2_null(nullptr, 4, "i", 2, shape, strides); |
| |
| auto fill = [](py::array arr) { |
| auto req = arr.request(); |
| for (int i = 0; i < 6; i++) ((int32_t *) req.ptr)[i] = i + 1; |
| return arr; |
| }; |
| |
| switch (i) { |
| // shape: (3, 2) |
| case 10: return arr_t(shape, strides, ptr); |
| case 11: return py::array(shape, strides, ptr); |
| case 12: return py::array(dtype, shape, strides, vptr); |
| case 13: return arr_t(shape, ptr); |
| case 14: return py::array(shape, ptr); |
| case 15: return py::array(dtype, shape, vptr); |
| case 16: return arr_t(buf_ndim2); |
| case 17: return py::array(buf_ndim2); |
| // shape: (3, 2) - post-fill |
| case 20: return fill(arr_t(shape, strides)); |
| case 21: return py::array(shape, strides, ptr); // can't have nullptr due to templated ctor |
| case 22: return fill(py::array(dtype, shape, strides)); |
| case 23: return fill(arr_t(shape)); |
| case 24: return py::array(shape, ptr); // can't have nullptr due to templated ctor |
| case 25: return fill(py::array(dtype, shape)); |
| case 26: return fill(arr_t(buf_ndim2_null)); |
| case 27: return fill(py::array(buf_ndim2_null)); |
| // shape: (6, ) |
| case 30: return arr_t(6, ptr); |
| case 31: return py::array(6, ptr); |
| case 32: return py::array(dtype, 6, vptr); |
| case 33: return arr_t(buf_ndim1); |
| case 34: return py::array(buf_ndim1); |
| // shape: (6, ) |
| case 40: return fill(arr_t(6)); |
| case 41: return py::array(6, ptr); // can't have nullptr due to templated ctor |
| case 42: return fill(py::array(dtype, 6)); |
| case 43: return fill(arr_t(buf_ndim1_null)); |
| case 44: return fill(py::array(buf_ndim1_null)); |
| } |
| return arr_t(); |
| } |
| |
| py::list test_dtype_ctors() { |
| py::list list; |
| list.append(py::dtype("int32")); |
| list.append(py::dtype(std::string("float64"))); |
| list.append(py::dtype::from_args(py::str("bool"))); |
| py::list names, offsets, formats; |
| py::dict dict; |
| names.append(py::str("a")); names.append(py::str("b")); dict["names"] = names; |
| offsets.append(py::int_(1)); offsets.append(py::int_(10)); dict["offsets"] = offsets; |
| formats.append(py::dtype("int32")); formats.append(py::dtype("float64")); dict["formats"] = formats; |
| dict["itemsize"] = py::int_(20); |
| list.append(py::dtype::from_args(dict)); |
| list.append(py::dtype(names, formats, offsets, 20)); |
| list.append(py::dtype(py::buffer_info((void *) 0, 1, "I", 1))); |
| list.append(py::dtype(py::buffer_info((void *) 0, 1, "T{i:a:f:b:}", 1))); |
| return list; |
| } |
| |
| py::list test_dtype_methods() { |
| py::list list; |
| auto dt1 = py::dtype::of<int32_t>(); |
| auto dt2 = py::dtype::of<SimpleStruct>(); |
| list.append(dt1); list.append(dt2); |
| list.append(py::bool_(dt1.has_fields())); list.append(py::bool_(dt2.has_fields())); |
| list.append(py::int_(dt1.itemsize())); list.append(py::int_(dt2.itemsize())); |
| return list; |
| } |
| |
| test_initializer numpy_dtypes([](py::module &m) { |
| try { |
| py::module::import("numpy"); |
| } catch (...) { |
| return; |
| } |
| |
| // typeinfo may be registered before the dtype descriptor for scalar casts to work... |
| py::class_<SimpleStruct>(m, "SimpleStruct"); |
| |
| PYBIND11_NUMPY_DTYPE(SimpleStruct, x, y, z); |
| PYBIND11_NUMPY_DTYPE(PackedStruct, x, y, z); |
| PYBIND11_NUMPY_DTYPE(NestedStruct, a, b); |
| PYBIND11_NUMPY_DTYPE(PartialStruct, x, y, z); |
| PYBIND11_NUMPY_DTYPE(PartialNestedStruct, a); |
| PYBIND11_NUMPY_DTYPE(StringStruct, a, b); |
| PYBIND11_NUMPY_DTYPE(EnumStruct, e1, e2); |
| |
| // ... or after |
| py::class_<PackedStruct>(m, "PackedStruct"); |
| |
| PYBIND11_NUMPY_DTYPE_EX(StructWithUglyNames, __x__, "x", __y__, "y"); |
| |
| m.def("create_rec_simple", &create_recarray<SimpleStruct>); |
| m.def("create_rec_packed", &create_recarray<PackedStruct>); |
| m.def("create_rec_nested", &create_nested); |
| m.def("create_rec_partial", &create_recarray<PartialStruct>); |
| m.def("create_rec_partial_nested", &create_partial_nested); |
| m.def("print_format_descriptors", &print_format_descriptors); |
| m.def("print_rec_simple", &print_recarray<SimpleStruct>); |
| m.def("print_rec_packed", &print_recarray<PackedStruct>); |
| m.def("print_rec_nested", &print_recarray<NestedStruct>); |
| m.def("print_dtypes", &print_dtypes); |
| m.def("get_format_unbound", &get_format_unbound); |
| m.def("create_string_array", &create_string_array); |
| m.def("print_string_array", &print_recarray<StringStruct>); |
| m.def("create_enum_array", &create_enum_array); |
| m.def("print_enum_array", &print_recarray<EnumStruct>); |
| m.def("test_array_ctors", &test_array_ctors); |
| m.def("test_dtype_ctors", &test_dtype_ctors); |
| m.def("test_dtype_methods", &test_dtype_methods); |
| m.def("f_simple", [](SimpleStruct s) { return s.y * 10; }); |
| m.def("f_packed", [](PackedStruct s) { return s.y * 10; }); |
| m.def("f_nested", [](NestedStruct s) { return s.a.y * 10; }); |
| m.def("register_dtype", []() { PYBIND11_NUMPY_DTYPE(SimpleStruct, x, y, z); }); |
| }); |
| |
| #undef PYBIND11_PACKED |