FM / ctypes

/usr/lib/python2.6/ctypes

Name	Size	Mode	Actions
macholib/	-	0755	rm
util.py	8531	0644	edit dl rm
util.py.binutils-no-dep	8376	0644	edit dl rm
util.pyc	7461	0644	edit dl rm
util.pyo	7461	0644	edit dl rm
wintypes.py	5349	0644	edit dl rm
wintypes.pyc	5933	0644	edit dl rm
wintypes.pyo	5933	0644	edit dl rm
_endian.py	2041	0644	edit dl rm
_endian.pyc	2274	0644	edit dl rm
_endian.pyo	2274	0644	edit dl rm
__init__.py	17004	0644	edit dl rm
__init__.pyc	19822	0644	edit dl rm
__init__.pyo	19822	0644	edit dl rm

Edit: /usr/lib/python2.6/ctypes/_endian.py (2041B)

_array_type = type(c_int * 3)

def _other_endian(typ):
    """Return the type with the 'other' byte order.  Simple types like
    c_int and so on already have __ctype_be__ and __ctype_le__
    attributes which contain the types, for more complicated types
    only arrays are supported.
    """
    try:
        return getattr(typ, _OTHER_ENDIAN)
    except AttributeError:
        if type(typ) == _array_type:
            return _other_endian(typ._type_) * typ._length_
        raise TypeError("This type does not support other endian: %s" % typ)

class _swapped_meta(type(Structure)):
    def __setattr__(self, attrname, value):
        if attrname == "_fields_":
            fields = []
            for desc in value:
                name = desc[0]
                typ = desc[1]
                rest = desc[2:]
                fields.append((name, _other_endian(typ)) + rest)
            value = fields
        super(_swapped_meta, self).__setattr__(attrname, value)

################################################################

# Note: The Structure metaclass checks for the *presence* (not the
# value!) of a _swapped_bytes_ attribute to determine the bit order in
# structures containing bit fields.

if sys.byteorder == "little":
    _OTHER_ENDIAN = "__ctype_be__"

LittleEndianStructure = Structure

class BigEndianStructure(Structure):
        """Structure with big endian byte order"""
        __metaclass__ = _swapped_meta
        _swappedbytes_ = None

elif sys.byteorder == "big":
    _OTHER_ENDIAN = "__ctype_le__"

BigEndianStructure = Structure
    class LittleEndianStructure(Structure):
        """Structure with little endian byte order"""
        __metaclass__ = _swapped_meta
        _swappedbytes_ = None

else:
    raise RuntimeError("Invalid byteorder")

###################################################################### # This file should be kept compatible with Python 2.3, see PEP 291. # ###################################################################### import sys from ctypes import * _array_type = type(c_int * 3) def _other_endian(typ): """Return the type with the 'other' byte order. Simple types like c_int and so on already have __ctype_be__ and __ctype_le__ attributes which contain the types, for more complicated types only arrays are supported. """ try: return getattr(typ, _OTHER_ENDIAN) except AttributeError: if type(typ) == _array_type: return _other_endian(typ._type_) * typ._length_ raise TypeError("This type does not support other endian: %s" % typ) class _swapped_meta(type(Structure)): def __setattr__(self, attrname, value): if attrname == "_fields_": fields = [] for desc in value: name = desc[0] typ = desc[1] rest = desc[2:] fields.append((name, _other_endian(typ)) + rest) value = fields super(_swapped_meta, self).__setattr__(attrname, value) ################################################################ # Note: The Structure metaclass checks for the *presence* (not the # value!) of a _swapped_bytes_ attribute to determine the bit order in # structures containing bit fields. if sys.byteorder == "little": _OTHER_ENDIAN = "__ctype_be__" LittleEndianStructure = Structure class BigEndianStructure(Structure): """Structure with big endian byte order""" __metaclass__ = _swapped_meta _swappedbytes_ = None elif sys.byteorder == "big": _OTHER_ENDIAN = "__ctype_le__" BigEndianStructure = Structure class LittleEndianStructure(Structure): """Structure with little endian byte order""" __metaclass__ = _swapped_meta _swappedbytes_ = None else: raise RuntimeError("Invalid byteorder")