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File _endian.py

import sys
from ctypes import *

_array_type = type(Array)

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
    arrays and structures are supported.
    """
    # check _OTHER_ENDIAN attribute (present if typ is primitive type)
    if hasattr(typ, _OTHER_ENDIAN):
        return getattr(typ, _OTHER_ENDIAN)
    # if typ is array
    if isinstance(typ, _array_type):
        return _other_endian(typ._type_) * typ._length_
    # if typ is structure
    if issubclass(typ, Structure):
        return typ
    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")

Name	Type	Size	Permission	Last Modified	Actions
.	DIR	-	drwxr-xr-x	2024-06-24 12:45:06
..	DIR	-	drwxr-xr-x	2024-06-24 12:45:06
macholib	DIR	-	drwxr-xr-x	2024-06-24 12:45:06
__init__.py	text/x-python	16.74 KB	-rw-r--r--	2024-04-10 04:58:35
__init__.pyc	application/octet-stream	19.72 KB	-rw-r--r--	2024-04-10 04:58:46
__init__.pyo	application/octet-stream	19.72 KB	-rw-r--r--	2024-04-10 04:58:46
_endian.py	text/x-python	1.95 KB	-rw-r--r--	2024-04-10 04:58:35
_endian.pyc	application/octet-stream	2.25 KB	-rw-r--r--	2024-04-10 04:58:46
_endian.pyo	application/octet-stream	2.25 KB	-rw-r--r--	2024-04-10 04:58:46
util.py	text/x-python	10.53 KB	-rw-r--r--	2024-04-10 04:58:35
util.py.binutils-no-dep	text/x-python	10.28 KB	-rw-r--r--	2024-04-10 04:58:35
util.pyc	application/octet-stream	8.35 KB	-rw-r--r--	2024-04-10 04:58:46
util.pyo	application/octet-stream	8.35 KB	-rw-r--r--	2024-04-10 04:58:46
wintypes.py	text/x-python	5.01 KB	-rw-r--r--	2024-04-10 04:58:35
wintypes.pyc	application/octet-stream	5.82 KB	-rw-r--r--	2024-04-10 04:58:46
wintypes.pyo	application/octet-stream	5.82 KB	-rw-r--r--	2024-04-10 04:58:46

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