RustPython · rodrigocam · Aug 7, 2021 · Oct 29, 2020 · Oct 31, 2020 · Oct 31, 2020
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Lib/ctypes/__init__.py b/Lib/ctypes/__init__.py
@@ -0,0 +1,349 @@
+
+"""create and manipulate C data types in Python"""
+
+import os as _os, sys as _sys
+
+__version__ = "1.1.0"
+
+from _ctypes import Struct, Array
+from _ctypes import _Pointer
+from _ctypes import CFuncPtr as _CFuncPtr
+from _ctypes import dlopen as _dlopen
+
+from struct import calcsize as _calcsize
+
+def create_string_buffer(init, size=None):
+    """create_string_buffer(aBytes) -> character array
+    create_string_buffer(anInteger) -> character array
+    create_string_buffer(aBytes, anInteger) -> character array
+    """
+    if isinstance(init, bytes):
+        if size is None:
+            size = len(init)+1
+        _sys.audit("ctypes.create_string_buffer", init, size)
+        buftype = c_char * size
+        buf = buftype()
+        buf.value = init
+        return buf
+    elif isinstance(init, int):
+        _sys.audit("ctypes.create_string_buffer", None, init)
+        buftype = c_char * init
+        buf = buftype()
+        return buf
+    raise TypeError(init)
+
+def c_buffer(init, size=None):
+    return create_string_buffer(init, size)
+
+_c_functype_cache = {}
+def CFUNCTYPE(restype, *argtypes, **kw):
+    """CFUNCTYPE(restype, *argtypes,
+                 use_errno=False, use_last_error=False) -> function prototype.
+    restype: the result type
+    argtypes: a sequence specifying the argument types
+    The function prototype can be called in different ways to create a
+    callable object:
+    prototype(integer address) -> foreign function
+    prototype(callable) -> create and return a C callable function from callable
+    prototype(integer index, method name[, paramflags]) -> foreign function calling a COM method
+    prototype((ordinal number, dll object)[, paramflags]) -> foreign function exported by ordinal
+    prototype((function name, dll object)[, paramflags]) -> foreign function exported by name
+    """
+    if kw:
+        raise ValueError("unexpected keyword argument(s) %s" % kw.keys())
+    try:
+        return _c_functype_cache[(restype, argtypes)]
+    except KeyError:
+        class CFunctionType(_CFuncPtr):
+            _argtypes_ = argtypes
+            _restype_ = restype
+        _c_functype_cache[(restype, argtypes)] = CFunctionType
+        return CFunctionType
+
+if _os.name == "nt":
+    _win_functype_cache = {}
+    def WINFUNCTYPE(restype, *argtypes, **kw):
+        # docstring set later (very similar to CFUNCTYPE.__doc__)
+        if kw:
+            raise ValueError("unexpected keyword argument(s) %s" % kw.keys())
+        try:
+            return _win_functype_cache[(restype, argtypes)]
+        except KeyError:
+            class WinFunctionType(_CFuncPtr):
+                _argtypes_ = argtypes
+                _restype_ = restype
+            _win_functype_cache[(restype, argtypes)] = WinFunctionType
+            return WinFunctionType
+    if WINFUNCTYPE.__doc__:
+        WINFUNCTYPE.__doc__ = CFUNCTYPE.__doc__.replace("CFUNCTYPE", "WINFUNCTYPE")
+
+
+from _ctypes import sizeof, byref, addressof, alignment
+from _ctypes import _SimpleCData
+
+
+def _check_size(typ, typecode=None):
+    # Check if sizeof(ctypes_type) against struct.calcsize.  This
+    # should protect somewhat against a misconfigured libffi.
+    from struct import calcsize
+    if typecode is None:
+        # Most _type_ codes are the same as used in struct
+        typecode = typ._type_
+    actual, required = sizeof(typ), calcsize(typecode)
+    if actual != required:
+        raise SystemError("sizeof(%s) wrong: %d instead of %d" % \
+                          (typ, actual, required))
+
+class c_short(_SimpleCData):
+    _type_ = "h"
+_check_size(c_short)
+
+class c_ushort(_SimpleCData):
+    _type_ = "H"
+
+class c_long(_SimpleCData):
+    _type_ = "l"
+_check_size(c_long)
+
+class c_ulong(_SimpleCData):
+    _type_ = "L"
+_check_size(c_ulong)
+
+if _calcsize("i") == _calcsize("l"):
+# if int and long have the same size, make c_int an alias for c_long
+    c_int = c_long
+    c_uint = c_ulong
+else:
+    class c_int(_SimpleCData):
+        _type_ = "i"
+    _check_size(c_int)
+
+    class c_uint(_SimpleCData):
+        _type_ = "I"
+    _check_size(c_uint)
+
+class c_float(_SimpleCData):
+    _type_ = "f"
+_check_size(c_float)
+
+class c_double(_SimpleCData):
+    _type_ = "d"
+_check_size(c_double)
+
+class c_longdouble(_SimpleCData):
+    _type_ = "g"
+if sizeof(c_longdouble) == sizeof(c_double):
+    c_longdouble = c_double
+
+if _calcsize("l") == _calcsize("q"):
+    # if long and long long have the same size, make c_longlong an alias for c_long
+    c_longlong = c_long
+    c_ulonglong = c_ulong
+else:
+    class c_longlong(_SimpleCData):
+        _type_ = "q"
+    _check_size(c_longlong)
+
+    class c_ulonglong(_SimpleCData):
+        _type_ = "Q"
+    _check_size(c_ulonglong)
+
+class c_ubyte(_SimpleCData):
+    _type_ = "B"
+c_ubyte.__ctype_le__ = c_ubyte.__ctype_be__ = c_ubyte
+_check_size(c_ubyte)
+
+class c_byte(_SimpleCData):
+    _type_ = "b"
+c_byte.__ctype_le__ = c_byte.__ctype_be__ = c_byte
+_check_size(c_byte)
+
+class c_char(_SimpleCData):
+    _type_ = "c"
+c_char.__ctype_le__ = c_char.__ctype_be__ = c_char
+_check_size(c_char)
+
+class c_char_p(_SimpleCData):
+    _type_ = "z"
+    def __repr__(self):
+        return "%s(%s)" % (self.__class__.__name__, c_void_p.from_buffer(self).value)
+_check_size(c_char_p, "P")
+
+
+class c_void_p(_SimpleCData):
+    _type_ = "P"
+c_voidp = c_void_p # backwards compatibility (to a bug)
+_check_size(c_void_p)
+
+class c_bool(_SimpleCData):
+    _type_ = "?"
+
+from _ctypes import POINTER, pointer, _pointer_type_cache
+
+class c_wchar_p(_SimpleCData):
+    _type_ = "Z"
+    def __repr__(self):
+        return "%s(%s)" % (self.__class__.__name__, c_void_p.from_buffer(self).value)
+
+class c_wchar(_SimpleCData):
+    _type_ = "u"
+
+def _reset_cache():
+    _pointer_type_cache.clear()
+    _c_functype_cache.clear()
+    if _os.name == "nt":
+        _win_functype_cache.clear()
+    # _SimpleCData.c_wchar_p_from_param
+    POINTER(c_wchar).from_param = c_wchar_p.from_param
+    # _SimpleCData.c_char_p_from_param
+    POINTER(c_char).from_param = c_char_p.from_param
+    _pointer_type_cache[None] = c_void_p
+
+def create_unicode_buffer(init, size=None):
+    """create_unicode_buffer(aString) -> character array
+    create_unicode_buffer(anInteger) -> character array
+    create_unicode_buffer(aString, anInteger) -> character array
+    """
+    if isinstance(init, str):
+        if size is None:
+            if sizeof(c_wchar) == 2:
+                # UTF-16 requires a surrogate pair (2 wchar_t) for non-BMP
+                # characters (outside [U+0000; U+FFFF] range). +1 for trailing
+                # NUL character.
+                size = sum(2 if ord(c) > 0xFFFF else 1 for c in init) + 1
+            else:
+                # 32-bit wchar_t (1 wchar_t per Unicode character). +1 for
+                # trailing NUL character.
+                size = len(init) + 1
+        _sys.audit("ctypes.create_unicode_buffer", init, size)
+        buftype = c_wchar * size
+        buf = buftype()
+        buf.value = init
+        return buf
+    elif isinstance(init, int):
+        _sys.audit("ctypes.create_unicode_buffer", None, init)
+        buftype = c_wchar * init
+        buf = buftype()
+        return buf
+    raise TypeError(init)
+
+
+# XXX Deprecated
+def SetPointerType(pointer, cls):
+    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:
+        raise RuntimeError("What's this???")
+    pointer.set_type(cls)
+    _pointer_type_cache[cls] = pointer
+    del _pointer_type_cache[id(pointer)]
+
+# XXX Deprecated
+def ARRAY(typ, len):
+    return typ * len
+
+################################################################
+
+class CDLL(object):
+    """An instance of this class represents a loaded dll/shared
+    library, exporting functions using the standard C calling
+    convention (named 'cdecl' on Windows).
+    The exported functions can be accessed as attributes, or by
+    indexing with the function name.  Examples:
+    <obj>.qsort -> callable object
+    <obj>['qsort'] -> callable object
+    """
+    _name = '<uninitialized>'
+    _handle = 0
+
+    def __init__(self, name,handle=None):
+        self._name = name
+
+        class _FuncPtr(_CFuncPtr):
+            pass
+
+        self._FuncPtr = _FuncPtr
+
+        if handle is None:
+            self._handle = _dlopen(self._name)
+        else:
+            self._handle = handle
+
+    def __repr__(self):
+        return "<%s '%s', handle %x at %#x>" % \
+               (self.__class__.__name__, self._name,
+                (self._handle & (_sys.maxsize*2 + 1)),
+                id(self) & (_sys.maxsize*2 + 1))
+
+    def __getattr__(self, name):
+        if name.startswith('__') and name.endswith('__'):
+            raise AttributeError(name)
+        func = self.__getitem__(name)
+        setattr(self, name, func)
+        return func
+
+    def __getitem__(self, name_or_ordinal):
+        func = self._FuncPtr(name_or_ordinal, self)
+        if not isinstance(name_or_ordinal, int):
+            func.__name__ = name_or_ordinal
+        return func
+
+class LibraryLoader(object):
+    def __init__(self, dlltype):
+        self._dlltype = dlltype
+
+    def __getattr__(self, name):
+        if name[0] == '_':
+            raise AttributeError(name)
+
+        dll = self._dlltype(name)
+        setattr(self, name, dll)
+
+        return dll
+
+    def __getitem__(self, name):
+        return getattr(self, name)
+
+    def LoadLibrary(self, name):
+        return self._dlltype(name)
+
+cdll = LibraryLoader(CDLL)
+
+if _os.name == "nt":
+    windll = LibraryLoader(CDLL)
+    oledll = LibraryLoader(CDLL)
+
+    GetLastError = windll.kernel32.GetLastError
+
+    def WinError(code=None, descr=None):
+        if code is None:
+            code = GetLastError()
+        if descr is None:
+            # descr = FormatError(code).strip()
+            descr = "Windows Error " + str(code)
+        return OSError(None, descr, None, code)
+
+if sizeof(c_uint) == sizeof(c_void_p):
+    c_size_t = c_uint
+    c_ssize_t = c_int
+elif sizeof(c_ulong) == sizeof(c_void_p):
+    c_size_t = c_ulong
+    c_ssize_t = c_long
+elif sizeof(c_ulonglong) == sizeof(c_void_p):
+    c_size_t = c_ulonglong
+    c_ssize_t = c_longlong
+
+# Fill in specifically-sized types
+c_int8 = c_byte
+c_uint8 = c_ubyte
+for kind in [c_short, c_int, c_long, c_longlong]:
+    if sizeof(kind) == 2: c_int16 = kind
+    elif sizeof(kind) == 4: c_int32 = kind
+    elif sizeof(kind) == 8: c_int64 = kind
+for kind in [c_ushort, c_uint, c_ulong, c_ulonglong]:
+    if sizeof(kind) == 2: c_uint16 = kind
+    elif sizeof(kind) == 4: c_uint32 = kind
+    elif sizeof(kind) == 8: c_uint64 = kind
+del(kind)
+
+# _reset_cache()