mirror of
https://github.com/pybind/pybind11.git
synced 2024-11-11 08:03:55 +00:00
9df2f1ff13
* Apply isort * Tweak isort config * Add env.py as a known_first_party * Add one missing known first party * Make config compat with older isort versions * Add another comment * Revert pyproject setting
164 lines
4.8 KiB
Python
164 lines
4.8 KiB
Python
# -*- coding: utf-8 -*-
|
|
import ctypes
|
|
import io
|
|
import struct
|
|
|
|
import pytest
|
|
|
|
import env # noqa: F401
|
|
from pybind11_tests import ConstructorStats
|
|
from pybind11_tests import buffers as m
|
|
|
|
np = pytest.importorskip("numpy")
|
|
|
|
|
|
def test_from_python():
|
|
with pytest.raises(RuntimeError) as excinfo:
|
|
m.Matrix(np.array([1, 2, 3])) # trying to assign a 1D array
|
|
assert str(excinfo.value) == "Incompatible buffer format!"
|
|
|
|
m3 = np.array([[1, 2, 3], [4, 5, 6]]).astype(np.float32)
|
|
m4 = m.Matrix(m3)
|
|
|
|
for i in range(m4.rows()):
|
|
for j in range(m4.cols()):
|
|
assert m3[i, j] == m4[i, j]
|
|
|
|
cstats = ConstructorStats.get(m.Matrix)
|
|
assert cstats.alive() == 1
|
|
del m3, m4
|
|
assert cstats.alive() == 0
|
|
assert cstats.values() == ["2x3 matrix"]
|
|
assert cstats.copy_constructions == 0
|
|
# assert cstats.move_constructions >= 0 # Don't invoke any
|
|
assert cstats.copy_assignments == 0
|
|
assert cstats.move_assignments == 0
|
|
|
|
|
|
# https://foss.heptapod.net/pypy/pypy/-/issues/2444
|
|
def test_to_python():
|
|
mat = m.Matrix(5, 4)
|
|
assert memoryview(mat).shape == (5, 4)
|
|
|
|
assert mat[2, 3] == 0
|
|
mat[2, 3] = 4.0
|
|
mat[3, 2] = 7.0
|
|
assert mat[2, 3] == 4
|
|
assert mat[3, 2] == 7
|
|
assert struct.unpack_from("f", mat, (3 * 4 + 2) * 4) == (7,)
|
|
assert struct.unpack_from("f", mat, (2 * 4 + 3) * 4) == (4,)
|
|
|
|
mat2 = np.array(mat, copy=False)
|
|
assert mat2.shape == (5, 4)
|
|
assert abs(mat2).sum() == 11
|
|
assert mat2[2, 3] == 4 and mat2[3, 2] == 7
|
|
mat2[2, 3] = 5
|
|
assert mat2[2, 3] == 5
|
|
|
|
cstats = ConstructorStats.get(m.Matrix)
|
|
assert cstats.alive() == 1
|
|
del mat
|
|
pytest.gc_collect()
|
|
assert cstats.alive() == 1
|
|
del mat2 # holds a mat reference
|
|
pytest.gc_collect()
|
|
assert cstats.alive() == 0
|
|
assert cstats.values() == ["5x4 matrix"]
|
|
assert cstats.copy_constructions == 0
|
|
# assert cstats.move_constructions >= 0 # Don't invoke any
|
|
assert cstats.copy_assignments == 0
|
|
assert cstats.move_assignments == 0
|
|
|
|
|
|
def test_inherited_protocol():
|
|
"""SquareMatrix is derived from Matrix and inherits the buffer protocol"""
|
|
|
|
matrix = m.SquareMatrix(5)
|
|
assert memoryview(matrix).shape == (5, 5)
|
|
assert np.asarray(matrix).shape == (5, 5)
|
|
|
|
|
|
def test_pointer_to_member_fn():
|
|
for cls in [m.Buffer, m.ConstBuffer, m.DerivedBuffer]:
|
|
buf = cls()
|
|
buf.value = 0x12345678
|
|
value = struct.unpack("i", bytearray(buf))[0]
|
|
assert value == 0x12345678
|
|
|
|
|
|
def test_readonly_buffer():
|
|
buf = m.BufferReadOnly(0x64)
|
|
view = memoryview(buf)
|
|
assert view[0] == b"d" if env.PY2 else 0x64
|
|
assert view.readonly
|
|
with pytest.raises(TypeError):
|
|
view[0] = b"\0" if env.PY2 else 0
|
|
|
|
|
|
def test_selective_readonly_buffer():
|
|
buf = m.BufferReadOnlySelect()
|
|
|
|
memoryview(buf)[0] = b"d" if env.PY2 else 0x64
|
|
assert buf.value == 0x64
|
|
|
|
io.BytesIO(b"A").readinto(buf)
|
|
assert buf.value == ord(b"A")
|
|
|
|
buf.readonly = True
|
|
with pytest.raises(TypeError):
|
|
memoryview(buf)[0] = b"\0" if env.PY2 else 0
|
|
with pytest.raises(TypeError):
|
|
io.BytesIO(b"1").readinto(buf)
|
|
|
|
|
|
def test_ctypes_array_1d():
|
|
char1d = (ctypes.c_char * 10)()
|
|
int1d = (ctypes.c_int * 15)()
|
|
long1d = (ctypes.c_long * 7)()
|
|
|
|
for carray in (char1d, int1d, long1d):
|
|
info = m.get_buffer_info(carray)
|
|
assert info.itemsize == ctypes.sizeof(carray._type_)
|
|
assert info.size == len(carray)
|
|
assert info.ndim == 1
|
|
assert info.shape == [info.size]
|
|
assert info.strides == [info.itemsize]
|
|
assert not info.readonly
|
|
|
|
|
|
def test_ctypes_array_2d():
|
|
char2d = ((ctypes.c_char * 10) * 4)()
|
|
int2d = ((ctypes.c_int * 15) * 3)()
|
|
long2d = ((ctypes.c_long * 7) * 2)()
|
|
|
|
for carray in (char2d, int2d, long2d):
|
|
info = m.get_buffer_info(carray)
|
|
assert info.itemsize == ctypes.sizeof(carray[0]._type_)
|
|
assert info.size == len(carray) * len(carray[0])
|
|
assert info.ndim == 2
|
|
assert info.shape == [len(carray), len(carray[0])]
|
|
assert info.strides == [info.itemsize * len(carray[0]), info.itemsize]
|
|
assert not info.readonly
|
|
|
|
|
|
@pytest.mark.skipif(
|
|
"env.PYPY and env.PY2", reason="PyPy2 bytes buffer not reported as readonly"
|
|
)
|
|
def test_ctypes_from_buffer():
|
|
test_pystr = b"0123456789"
|
|
for pyarray in (test_pystr, bytearray(test_pystr)):
|
|
pyinfo = m.get_buffer_info(pyarray)
|
|
|
|
if pyinfo.readonly:
|
|
cbytes = (ctypes.c_char * len(pyarray)).from_buffer_copy(pyarray)
|
|
cinfo = m.get_buffer_info(cbytes)
|
|
else:
|
|
cbytes = (ctypes.c_char * len(pyarray)).from_buffer(pyarray)
|
|
cinfo = m.get_buffer_info(cbytes)
|
|
|
|
assert cinfo.size == pyinfo.size
|
|
assert cinfo.ndim == pyinfo.ndim
|
|
assert cinfo.shape == pyinfo.shape
|
|
assert cinfo.strides == pyinfo.strides
|
|
assert not cinfo.readonly
|