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fixing up ctypes.memmove and ctypes.memset (#13252)

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This commit is contained in:
Stephen Morton
2024-12-22 16:53:03 -08:00
committed by GitHub
parent e744b2eb34
commit d8b7ad6e89
2 changed files with 51 additions and 18 deletions
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6
stdlib/@tests/stubtest_allowlists/common.txt
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@@ -14,9 +14,6 @@ asyncio.base_events.BaseEventLoop.subprocess_exec # BaseEventLoop adds several
builtins.dict.get
collections\.ChainMap\.fromkeys # https://github.com/python/mypy/issues/17023
contextlib._GeneratorContextManagerBase.__init__ # skipped in the stubs in favor of its child classes
ctypes.CDLL._FuncPtr # None at class level but initialized in __init__ to this value
ctypes.memmove # CFunctionType
ctypes.memset # CFunctionType
http.client.HTTPConnection.response_class # the actual type at runtime is abc.ABCMeta
importlib.abc.Loader.exec_module # See Lib/importlib/_abc.py. Might be defined for backwards compatibility
importlib.abc.MetaPathFinder.find_spec # Not defined on the actual class, but expected to exist.
@@ -319,9 +316,10 @@ csv.Dialect.skipinitialspace
csv.DictReader.__init__ # runtime sig has *args but will error if more than 5 positional args are supplied
csv.DictWriter.__init__ # runtime sig has *args but will error if more than 5 positional args are supplied
_?ctypes.Array.raw # exists but stubtest can't see it; only available if _CT == c_char
_?ctypes.Array._type_ # _type_ is abstract, https://github.com/python/typeshed/pull/6361
_?ctypes.Array._length_ # _length_ is abstract, https://github.com/python/typeshed/pull/6361
_?ctypes.Array.raw # exists but stubtest can't see it; only available if _CT == c_char
ctypes.CDLL._FuncPtr # None at class level but initialized in __init__ to this value
_?ctypes.Structure.__getattr__ # doesn't exist, but makes things easy if we pretend it does
_?ctypes.Union.__getattr__ # doesn't exist, but makes things easy if we pretend it does

63
stdlib/ctypes/__init__.pyi
View File

@@ -25,7 +25,7 @@ from _ctypes import (
sizeof as sizeof,
)
from ctypes._endian import BigEndianStructure as BigEndianStructure, LittleEndianStructure as LittleEndianStructure
from typing import Any, ClassVar, Generic, TypeVar
from typing import Any, ClassVar, Generic, TypeVar, type_check_only
from typing_extensions import Self, TypeAlias, deprecated
if sys.platform == "win32":
@@ -45,12 +45,24 @@ DEFAULT_MODE: int
class ArgumentError(Exception): ...
# defined within CDLL.__init__
# Runtime name is ctypes.CDLL.__init__.<locals>._FuncPtr
@type_check_only
class _FuncPtr(_CFuncPtr):
_flags_: ClassVar[int]
_restype_: ClassVar[type[_CDataType]]
# Not a real class; _FuncPtr with a __name__ set on it.
@type_check_only
class _NamedFuncPointer(_FuncPtr):
__name__: str
class CDLL:
_func_flags_: ClassVar[int]
_func_restype_: ClassVar[type[_CDataType]]
_name: str
_handle: int
_FuncPtr: type[_FuncPointer]
_FuncPtr: type[_FuncPtr]
def __init__(
self,
name: str | None,
@@ -84,27 +96,36 @@ if sys.platform == "win32":
pydll: LibraryLoader[PyDLL]
pythonapi: PyDLL
class _FuncPointer(_CFuncPtr): ...
# Class definition within CFUNCTYPE / WINFUNCTYPE / PYFUNCTYPE
# Names at runtime are
# ctypes.CFUNCTYPE.<locals>.CFunctionType
# ctypes.WINFUNCTYPE.<locals>.WinFunctionType
# ctypes.PYFUNCTYPE.<locals>.CFunctionType
@type_check_only
class _CFunctionType(_CFuncPtr):
_argtypes_: ClassVar[list[type[_CData | _CDataType]]]
_restype_: ClassVar[type[_CData | _CDataType] | None]
_flags_: ClassVar[int]
class _NamedFuncPointer(_FuncPointer):
__name__: str
# Alias for either function pointer type
_FuncPointer: TypeAlias = _FuncPtr | _CFunctionType # noqa: Y047 # not used here
def CFUNCTYPE(
restype: type[_CData | _CDataType] | None,
*argtypes: type[_CData | _CDataType],
use_errno: bool = ...,
use_last_error: bool = ...,
) -> type[_FuncPointer]: ...
use_errno: bool = False,
use_last_error: bool = False,
) -> type[_CFunctionType]: ...
if sys.platform == "win32":
def WINFUNCTYPE(
restype: type[_CData | _CDataType] | None,
*argtypes: type[_CData | _CDataType],
use_errno: bool = ...,
use_last_error: bool = ...,
) -> type[_FuncPointer]: ...
use_errno: bool = False,
use_last_error: bool = False,
) -> type[_CFunctionType]: ...
def PYFUNCTYPE(restype: type[_CData | _CDataType] | None, *argtypes: type[_CData | _CDataType]) -> type[_FuncPointer]: ...
def PYFUNCTYPE(restype: type[_CData | _CDataType] | None, *argtypes: type[_CData | _CDataType]) -> type[_CFunctionType]: ...
# Any type that can be implicitly converted to c_void_p when passed as a C function argument.
# (bytes is not included here, see below.)
@@ -134,8 +155,22 @@ if sys.platform == "win32":
def DllGetClassObject(rclsid: Any, riid: Any, ppv: Any) -> int: ... # TODO not documented
def GetLastError() -> int: ...
def memmove(dst: _CVoidPLike, src: _CVoidConstPLike, count: int) -> int: ...
def memset(dst: _CVoidPLike, c: int, count: int) -> int: ...
# Actually just an instance of _CFunctionType, but we want to set a more
# specific __call__.
@type_check_only
class _MemmoveFunctionType(_CFunctionType):
def __call__(self, dst: _CVoidPLike, src: _CVoidConstPLike, count: int) -> int: ...
memmove: _MemmoveFunctionType
# Actually just an instance of _CFunctionType, but we want to set a more
# specific __call__.
@type_check_only
class _MemsetFunctionType(_CFunctionType):
def __call__(self, dst: _CVoidPLike, c: int, count: int) -> int: ...
memset: _MemsetFunctionType
def string_at(ptr: _CVoidConstPLike, size: int = -1) -> bytes: ...
if sys.platform == "win32":