RustPython · youknowone · Dec 23, 2025 · Dec 23, 2025 · Dec 23, 2025 · Dec 20, 2025
diff --git a/Lib/ctypes/__init__.py b/Lib/ctypes/__init__.py
@@ -1,6 +1,8 @@
 """create and manipulate C data types in Python"""
 
-import os as _os, sys as _sys
+import os as _os
+import sys as _sys
+import sysconfig as _sysconfig
 import types as _types
 
 __version__ = "1.1.0"
@@ -36,9 +38,6 @@
      FUNCFLAG_USE_ERRNO as _FUNCFLAG_USE_ERRNO, \
      FUNCFLAG_USE_LASTERROR as _FUNCFLAG_USE_LASTERROR
 
-# TODO: RUSTPYTHON remove this
-from _ctypes import _non_existing_function
-
 # WINOLEAPI -> HRESULT
 # WINOLEAPI_(type)
 #
@@ -110,7 +109,7 @@ class CFunctionType(_CFuncPtr):
     return CFunctionType
 
 if _os.name == "nt":
-    from _ctypes import LoadLibrary as _dlopen
+    from _ctypes import LoadLibrary as _LoadLibrary
     from _ctypes import FUNCFLAG_STDCALL as _FUNCFLAG_STDCALL
 
     _win_functype_cache = {}
@@ -305,8 +304,9 @@ def create_unicode_buffer(init, size=None):
     raise TypeError(init)
 
 
-# XXX Deprecated
 def SetPointerType(pointer, cls):
+    import warnings
+    warnings._deprecated("ctypes.SetPointerType", remove=(3, 15))
     if _pointer_type_cache.get(cls, None) is not None:
         raise RuntimeError("This type already exists in the cache")
     if id(pointer) not in _pointer_type_cache:
@@ -315,7 +315,6 @@ def SetPointerType(pointer, cls):
     _pointer_type_cache[cls] = pointer
     del _pointer_type_cache[id(pointer)]
 
-# XXX Deprecated
 def ARRAY(typ, len):
     return typ * len
 
@@ -347,52 +346,59 @@ def __init__(self, name, mode=DEFAULT_MODE, handle=None,
                  use_errno=False,
                  use_last_error=False,
                  winmode=None):
+        class _FuncPtr(_CFuncPtr):
+            _flags_ = self._func_flags_
+            _restype_ = self._func_restype_
+            if use_errno:
+                _flags_ |= _FUNCFLAG_USE_ERRNO
+            if use_last_error:
+                _flags_ |= _FUNCFLAG_USE_LASTERROR
+
+        self._FuncPtr = _FuncPtr
         if name:
             name = _os.fspath(name)
 
+        self._handle = self._load_library(name, mode, handle, winmode)
+
+    if _os.name == "nt":
+        def _load_library(self, name, mode, handle, winmode):
+            if winmode is None:
+                import nt as _nt
+                winmode = _nt._LOAD_LIBRARY_SEARCH_DEFAULT_DIRS
+                # WINAPI LoadLibrary searches for a DLL if the given name
+                # is not fully qualified with an explicit drive. For POSIX
+                # compatibility, and because the DLL search path no longer
+                # contains the working directory, begin by fully resolving
+                # any name that contains a path separator.
+                if name is not None and ('/' in name or '\\' in name):
+                    name = _nt._getfullpathname(name)
+                    winmode |= _nt._LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR
+            self._name = name
+            if handle is not None:
+                return handle
+            return _LoadLibrary(self._name, winmode)
+
+    else:
+        def _load_library(self, name, mode, handle, winmode):
             # If the filename that has been provided is an iOS/tvOS/watchOS
             # .fwork file, dereference the location to the true origin of the
             # binary.
-            if name.endswith(".fwork"):
+            if name and name.endswith(".fwork"):
                 with open(name) as f:
                     name = _os.path.join(
                         _os.path.dirname(_sys.executable),
                         f.read().strip()
                     )
-
-        self._name = name
-        flags = self._func_flags_
-        if use_errno:
-            flags |= _FUNCFLAG_USE_ERRNO
-        if use_last_error:
-            flags |= _FUNCFLAG_USE_LASTERROR
-        if _sys.platform.startswith("aix"):
-            """When the name contains ".a(" and ends with ")",
-               e.g., "libFOO.a(libFOO.so)" - this is taken to be an
-               archive(member) syntax for dlopen(), and the mode is adjusted.
-               Otherwise, name is presented to dlopen() as a file argument.
-            """
-            if name and name.endswith(")") and ".a(" in name:
-                mode |= ( _os.RTLD_MEMBER | _os.RTLD_NOW )
-        if _os.name == "nt":
-            if winmode is not None:
-                mode = winmode
-            else:
-                import nt
-                mode = nt._LOAD_LIBRARY_SEARCH_DEFAULT_DIRS
-                if '/' in name or '\\' in name:
-                    self._name = nt._getfullpathname(self._name)
-                    mode |= nt._LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR
-
-        class _FuncPtr(_CFuncPtr):
-            _flags_ = flags
-            _restype_ = self._func_restype_
-        self._FuncPtr = _FuncPtr
-
-        if handle is None:
-            self._handle = _dlopen(self._name, mode)
-        else:
-            self._handle = handle
+            if _sys.platform.startswith("aix"):
+                """When the name contains ".a(" and ends with ")",
+                   e.g., "libFOO.a(libFOO.so)" - this is taken to be an
+                   archive(member) syntax for dlopen(), and the mode is adjusted.
+                   Otherwise, name is presented to dlopen() as a file argument.
+                """
+                if name and name.endswith(")") and ".a(" in name:
+                    mode |= _os.RTLD_MEMBER | _os.RTLD_NOW
+            self._name = name
+            return _dlopen(name, mode)
 
     def __repr__(self):
         return "<%s '%s', handle %x at %#x>" % \
@@ -480,10 +486,9 @@ def LoadLibrary(self, name):
 
 if _os.name == "nt":
     pythonapi = PyDLL("python dll", None, _sys.dllhandle)
-elif _sys.platform == "android":
-    pythonapi = PyDLL("libpython%d.%d.so" % _sys.version_info[:2])
-elif _sys.platform == "cygwin":
-    pythonapi = PyDLL("libpython%d.%d.dll" % _sys.version_info[:2])
+elif _sys.platform in ["android", "cygwin"]:
+    # These are Unix-like platforms which use a dynamically-linked libpython.
+    pythonapi = PyDLL(_sysconfig.get_config_var("LDLIBRARY"))
 else:
     pythonapi = PyDLL(None)
 

diff --git a/Lib/ctypes/_endian.py b/Lib/ctypes/_endian.py
@@ -1,5 +1,5 @@
 import sys
-from ctypes import *
+from ctypes import Array, Structure, Union
 
 _array_type = type(Array)
 
@@ -15,8 +15,8 @@ def _other_endian(typ):
     # if typ is array
     if isinstance(typ, _array_type):
         return _other_endian(typ._type_) * typ._length_
-    # if typ is structure
-    if issubclass(typ, Structure):
+    # if typ is structure or union
+    if issubclass(typ, (Structure, Union)):
         return typ
     raise TypeError("This type does not support other endian: %s" % typ)
 
@@ -37,7 +37,7 @@ class _swapped_union_meta(_swapped_meta, type(Union)): pass
 ################################################################
 
 # Note: The Structure metaclass checks for the *presence* (not the
-# value!) of a _swapped_bytes_ attribute to determine the bit order in
+# value!) of a _swappedbytes_ attribute to determine the bit order in
 # structures containing bit fields.
 
 if sys.byteorder == "little":

diff --git a/Lib/ctypes/test/__init__.py b/Lib/ctypes/test/__init__.py
diff --git a/Lib/ctypes/test/__main__.py b/Lib/ctypes/test/__main__.py
diff --git a/Lib/ctypes/test/test_delattr.py b/Lib/ctypes/test/test_delattr.py
diff --git a/Lib/ctypes/test/test_simplesubclasses.py b/Lib/ctypes/test/test_simplesubclasses.py
diff --git a/Lib/ctypes/util.py b/Lib/ctypes/util.py
@@ -67,7 +67,7 @@ def find_library(name):
                 return fname
         return None
 
-elif os.name == "posix" and sys.platform == "darwin":
+elif os.name == "posix" and sys.platform in {"darwin", "ios", "tvos", "watchos"}:
     from ctypes.macholib.dyld import dyld_find as _dyld_find
     def find_library(name):
         possible = ['lib%s.dylib' % name,
@@ -89,15 +89,27 @@ def find_library(name):
 
     from ctypes._aix import find_library
 
+elif sys.platform == "android":
+    def find_library(name):
+        directory = "/system/lib"
+        if "64" in os.uname().machine:
+            directory += "64"
+
+        fname = f"{directory}/lib{name}.so"
+        return fname if os.path.isfile(fname) else None
+
 elif os.name == "posix":
     # Andreas Degert's find functions, using gcc, /sbin/ldconfig, objdump
     import re, tempfile
 
     def _is_elf(filename):
         "Return True if the given file is an ELF file"
         elf_header = b'\x7fELF'
-        with open(filename, 'br') as thefile:
-            return thefile.read(4) == elf_header
+        try:
+            with open(filename, 'br') as thefile:
+                return thefile.read(4) == elf_header
+        except FileNotFoundError:
+            return False
 
     def _findLib_gcc(name):
         # Run GCC's linker with the -t (aka --trace) option and examine the

diff --git a/Lib/platform.py b/Lib/platform.py
@@ -1080,7 +1080,7 @@ def _sys_version(sys_version=None):
               match.groups()
 
         # XXX: RUSTPYTHON support
-        if "rustc" in sys_version:
+        if "RustPython" in sys_version:
             name = "RustPython"
         else:
             name = 'CPython'

diff --git a/Lib/test/test_ctypes.py b/Lib/test/test_ctypes.py
diff --git a/Lib/test/test_ctypes/__init__.py b/Lib/test/test_ctypes/__init__.py
@@ -0,0 +1,10 @@
+import os
+from test import support
+from test.support import import_helper
+
+
+# skip tests if the _ctypes extension was not built
+import_helper.import_module('ctypes')
+
+def load_tests(*args):
+    return support.load_package_tests(os.path.dirname(__file__), *args)
diff --git a/Lib/test/test_ctypes/__main__.py b/Lib/test/test_ctypes/__main__.py
@@ -0,0 +1,4 @@
+from test.test_ctypes import load_tests
+import unittest
+
+unittest.main()
diff --git a/Lib/test/test_ctypes/_support.py b/Lib/test/test_ctypes/_support.py
@@ -0,0 +1,24 @@
+# Some classes and types are not export to _ctypes module directly.
+
+import ctypes
+from _ctypes import Structure, Union, _Pointer, Array, _SimpleCData, CFuncPtr
+
+
+_CData = Structure.__base__
+assert _CData.__name__ == "_CData"
+
+class _X(Structure):
+    _fields_ = [("x", ctypes.c_int)]
+CField = type(_X.x)
+
+# metaclasses
+PyCStructType = type(Structure)
+UnionType = type(Union)
+PyCPointerType = type(_Pointer)
+PyCArrayType = type(Array)
+PyCSimpleType = type(_SimpleCData)
+PyCFuncPtrType = type(CFuncPtr)
+
+# type flags
+Py_TPFLAGS_DISALLOW_INSTANTIATION = 1 << 7
+Py_TPFLAGS_IMMUTABLETYPE = 1 << 8