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resolve verstamp bootstraping problem
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""" | ||
A pure-python re-implementation of methods used by win32verstamp. | ||
This is to avoid a bootstraping problem where win32verstamp is used during build, | ||
but requires an installation of pywin32 to be present. | ||
We used to work around this by ignoring failure to verstamp, but that's easy to miss. | ||
Implementations adapted, simplified and typed from: | ||
- https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/core/ctypes/_util.py | ||
- https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/core/cffi/_resource.py | ||
- https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/pywin32/win32api.py | ||
--- | ||
(C) Copyright 2014 Enthought, Inc., Austin, TX | ||
All right reserved. | ||
This file is open source software distributed according to the terms in | ||
https://github.com/enthought/pywin32-ctypes/blob/main/LICENSE.txt | ||
""" | ||
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from __future__ import annotations | ||
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from collections.abc import Callable, Iterable | ||
from ctypes import FormatError, WinDLL, _SimpleCData, get_last_error | ||
from ctypes.wintypes import ( | ||
BOOL, | ||
DWORD, | ||
HANDLE, | ||
LPCWSTR, | ||
LPVOID, | ||
WORD, | ||
) | ||
from typing import TYPE_CHECKING, Any, SupportsBytes, SupportsIndex | ||
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if TYPE_CHECKING: | ||
from ctypes import _NamedFuncPointer | ||
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from _typeshed import ReadableBuffer | ||
from typing_extensions import Literal | ||
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kernel32 = WinDLL("kernel32", use_last_error=True) | ||
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### | ||
# https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/core/ctypes/_util.py | ||
### | ||
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def function_factory( | ||
function: _NamedFuncPointer, | ||
argument_types: list[type[_SimpleCData[Any]]], | ||
return_type: type[_SimpleCData[Any]], | ||
error_checking: Callable[..., Any], # Incomplete | ||
) -> _NamedFuncPointer: | ||
function.argtypes = argument_types | ||
function.restype = return_type | ||
function.errcheck = error_checking | ||
return function | ||
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def make_error(function: _NamedFuncPointer) -> OSError: | ||
code = get_last_error() | ||
description = FormatError(code).strip() | ||
function_name = function.__name__ | ||
exception = OSError() | ||
exception.winerror = code | ||
exception.function = function_name | ||
exception.strerror = description | ||
return exception | ||
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def check_null(result: int | None, function: _NamedFuncPointer, *_) -> int: | ||
if result is None: | ||
raise make_error(function) | ||
return result | ||
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def check_false(result: int | None, function: _NamedFuncPointer, *_) -> Literal[True]: | ||
if not bool(result): | ||
raise make_error(function) | ||
else: | ||
return True | ||
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### | ||
# https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/core/cffi/_resource.py | ||
### | ||
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def _UpdateResource( | ||
hUpdate: int, | ||
lpType: str | int, | ||
lpName: str | int, | ||
wLanguage: int, | ||
lpData: bytes, | ||
cbData: int, | ||
): | ||
lp_type = LPCWSTR(lpType) | ||
lp_name = LPCWSTR(lpName) | ||
_BaseUpdateResource(hUpdate, lp_type, lp_name, wLanguage, lpData, cbData) | ||
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_BeginUpdateResource = function_factory( | ||
kernel32.BeginUpdateResourceW, | ||
[LPCWSTR, BOOL], | ||
HANDLE, | ||
check_null, | ||
) | ||
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_EndUpdateResource = function_factory( | ||
kernel32.EndUpdateResourceW, | ||
[HANDLE, BOOL], | ||
BOOL, | ||
check_false, | ||
) | ||
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_BaseUpdateResource = function_factory( | ||
kernel32.UpdateResourceW, | ||
[HANDLE, LPCWSTR, LPCWSTR, WORD, LPVOID, DWORD], | ||
BOOL, | ||
check_false, | ||
) | ||
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### | ||
# https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/pywin32/win32api.py | ||
### | ||
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LANG_NEUTRAL = 0x00 | ||
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def BeginUpdateResource(filename: str, delete: bool): | ||
"""Get a handle that can be used by the :func:`UpdateResource`. | ||
Parameters | ||
---------- | ||
fileName : unicode | ||
The filename of the module to load. | ||
delete : bool | ||
When true all existing resources are deleted | ||
Returns | ||
------- | ||
result : hModule | ||
Handle of the resource. | ||
""" | ||
return _BeginUpdateResource(filename, delete) | ||
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def EndUpdateResource(handle: int, discard: bool) -> None: | ||
"""End the update resource of the handle. | ||
Parameters | ||
---------- | ||
handle : hModule | ||
The handle of the resource as it is returned | ||
by :func:`BeginUpdateResource` | ||
discard : bool | ||
When True all writes are discarded. | ||
""" | ||
_EndUpdateResource(handle, discard) | ||
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def UpdateResource( | ||
handle: int, | ||
type: str | int, | ||
name: str | int, | ||
data: Iterable[SupportsIndex] | SupportsIndex | SupportsBytes | ReadableBuffer, | ||
language=LANG_NEUTRAL, | ||
) -> None: | ||
"""Update a resource. | ||
Parameters | ||
---------- | ||
handle : hModule | ||
The handle of the resource file as returned by | ||
:func:`BeginUpdateResource`. | ||
type : str : int | ||
The type of resource to update. | ||
name : str : int | ||
The name or Id of the resource to update. | ||
data : bytes | ||
A bytes like object is expected. | ||
.. note:: | ||
PyWin32 version 219, on Python 2.7, can handle unicode inputs. | ||
However, the data are stored as bytes and it is not really | ||
possible to convert the information back into the original | ||
unicode string. To be consistent with the Python 3 behaviour | ||
of PyWin32, we raise an error if the input cannot be | ||
converted to `bytes`. | ||
language : int | ||
Language to use, default is LANG_NEUTRAL. | ||
""" | ||
try: | ||
lp_data = bytes(data) | ||
except UnicodeEncodeError: | ||
raise TypeError("a bytes-like object is required, not a 'unicode'") | ||
_UpdateResource(handle, type, name, language, lp_data, len(lp_data)) |
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