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__pycache__	-	Open
test_aligned_structures.py	10.94 MB	View DL Edit
test_anon.py	2.51 MB	View DL Edit
test_arrays.py	8.74 MB	View DL Edit
test_array_in_pointer.py	1.73 MB	View DL Edit
test_as_parameter.py	7.21 MB	View DL Edit
test_bitfields.py	10.23 MB	View DL Edit
test_buffers.py	2.52 MB	View DL Edit
test_bytes.py	1.98 MB	View DL Edit
test_byteswap.py	13.49 MB	View DL Edit
test_callbacks.py	11.25 MB	View DL Edit
test_cast.py	3.72 MB	View DL Edit
test_cfuncs.py	7.65 MB	View DL Edit
test_checkretval.py	1.05 MB	View DL Edit
test_c_simple_type_meta.py	4.85 MB	View DL Edit
test_delattr.py	562 B	View DL Edit
test_dlerror.py	6.34 MB	View DL Edit
test_errno.py	2.25 MB	View DL Edit
test_find.py	5.33 MB	View DL Edit
test_frombuffer.py	5.15 MB	View DL Edit
test_funcptr.py	4.31 MB	View DL Edit
test_functions.py	14.47 MB	View DL Edit
test_incomplete.py	1.3 MB	View DL Edit
test_init.py	1.03 MB	View DL Edit
test_internals.py	2.48 MB	View DL Edit
test_keeprefs.py	3.14 MB	View DL Edit
test_libc.py	1.17 MB	View DL Edit
test_loading.py	7.59 MB	View DL Edit
test_macholib.py	4.45 MB	View DL Edit
test_memfunctions.py	3.29 MB	View DL Edit
test_numbers.py	6.94 MB	View DL Edit
test_objects.py	1.52 MB	View DL Edit
test_parameters.py	10.65 MB	View DL Edit
test_pep3118.py	8.95 MB	View DL Edit
test_pickling.py	2.39 MB	View DL Edit
test_pointers.py	8.03 MB	View DL Edit
test_prototypes.py	6.89 MB	View DL Edit
test_python_api.py	2.74 MB	View DL Edit
test_random_things.py	2.82 MB	View DL Edit
test_refcounts.py	4.15 MB	View DL Edit
test_repr.py	1 MB	View DL Edit
test_returnfuncptrs.py	2.96 MB	View DL Edit
test_simplesubclasses.py	3.06 MB	View DL Edit
test_sizes.py	1.06 MB	View DL Edit
test_slicing.py	5.6 MB	View DL Edit
test_stringptr.py	2.82 MB	View DL Edit
test_strings.py	3.76 MB	View DL Edit
test_structures.py	32.01 MB	View DL Edit
test_struct_fields.py	4.23 MB	View DL Edit
test_unaligned_structures.py	1.33 MB	View DL Edit
test_unicode.py	1.97 MB	View DL Edit
test_unions.py	1.4 MB	View DL Edit
test_values.py	4.1 MB	View DL Edit
test_varsize_struct.py	1.83 MB	View DL Edit
test_win32.py	5.62 MB	View DL Edit
test_win32_com_foreign_func.py	8.97 MB	View DL Edit
test_wintypes.py	2.06 MB	View DL Edit
_support.py	593 B	View DL Edit
__init__.py	262 B	View DL Edit
__main__.py	73 B	View DL Edit

Edit file: /opt/alt/python313/lib64/python3.13/test/test_ctypes/test_byteswap.py

import binascii
import ctypes
import math
import struct
import sys
import unittest
from ctypes import (Structure, Union, LittleEndianUnion, BigEndianUnion,
                    BigEndianStructure, LittleEndianStructure,
                    POINTER, sizeof, cast,
                    c_byte, c_ubyte, c_char, c_wchar, c_void_p,
                    c_short, c_ushort, c_int, c_uint,
                    c_long, c_ulong, c_longlong, c_ulonglong,
                    c_uint32, c_float, c_double)

def bin(s):
    return binascii.hexlify(memoryview(s)).decode().upper()

# Each *simple* type that supports different byte orders has an
# __ctype_be__ attribute that specifies the same type in BIG ENDIAN
# byte order, and a __ctype_le__ attribute that is the same type in
# LITTLE ENDIAN byte order.
#
# For Structures and Unions, these types are created on demand.

class Test(unittest.TestCase):
    def test_slots(self):
        class BigPoint(BigEndianStructure):
            __slots__ = ()
            _fields_ = [("x", c_int), ("y", c_int)]

class LowPoint(LittleEndianStructure):
            __slots__ = ()
            _fields_ = [("x", c_int), ("y", c_int)]

big = BigPoint()
        little = LowPoint()
        big.x = 4
        big.y = 2
        little.x = 2
        little.y = 4
        with self.assertRaises(AttributeError):
            big.z = 42
        with self.assertRaises(AttributeError):
            little.z = 24

def test_endian_short(self):
        if sys.byteorder == "little":
            self.assertIs(c_short.__ctype_le__, c_short)
            self.assertIs(c_short.__ctype_be__.__ctype_le__, c_short)
        else:
            self.assertIs(c_short.__ctype_be__, c_short)
            self.assertIs(c_short.__ctype_le__.__ctype_be__, c_short)
        s = c_short.__ctype_be__(0x1234)
        self.assertEqual(bin(struct.pack(">h", 0x1234)), "1234")
        self.assertEqual(bin(s), "1234")
        self.assertEqual(s.value, 0x1234)

s = c_short.__ctype_le__(0x1234)
        self.assertEqual(bin(struct.pack("<h", 0x1234)), "3412")
        self.assertEqual(bin(s), "3412")
        self.assertEqual(s.value, 0x1234)

s = c_ushort.__ctype_be__(0x1234)
        self.assertEqual(bin(struct.pack(">h", 0x1234)), "1234")
        self.assertEqual(bin(s), "1234")
        self.assertEqual(s.value, 0x1234)

s = c_ushort.__ctype_le__(0x1234)
        self.assertEqual(bin(struct.pack("<h", 0x1234)), "3412")
        self.assertEqual(bin(s), "3412")
        self.assertEqual(s.value, 0x1234)

def test_endian_int(self):
        if sys.byteorder == "little":
            self.assertIs(c_int.__ctype_le__, c_int)
            self.assertIs(c_int.__ctype_be__.__ctype_le__, c_int)
        else:
            self.assertIs(c_int.__ctype_be__, c_int)
            self.assertIs(c_int.__ctype_le__.__ctype_be__, c_int)

s = c_int.__ctype_be__(0x12345678)
        self.assertEqual(bin(struct.pack(">i", 0x12345678)), "12345678")
        self.assertEqual(bin(s), "12345678")
        self.assertEqual(s.value, 0x12345678)

s = c_int.__ctype_le__(0x12345678)
        self.assertEqual(bin(struct.pack("<i", 0x12345678)), "78563412")
        self.assertEqual(bin(s), "78563412")
        self.assertEqual(s.value, 0x12345678)

s = c_uint.__ctype_be__(0x12345678)
        self.assertEqual(bin(struct.pack(">I", 0x12345678)), "12345678")
        self.assertEqual(bin(s), "12345678")
        self.assertEqual(s.value, 0x12345678)

s = c_uint.__ctype_le__(0x12345678)
        self.assertEqual(bin(struct.pack("<I", 0x12345678)), "78563412")
        self.assertEqual(bin(s), "78563412")
        self.assertEqual(s.value, 0x12345678)

def test_endian_longlong(self):
        if sys.byteorder == "little":
            self.assertIs(c_longlong.__ctype_le__, c_longlong)
            self.assertIs(c_longlong.__ctype_be__.__ctype_le__, c_longlong)
        else:
            self.assertIs(c_longlong.__ctype_be__, c_longlong)
            self.assertIs(c_longlong.__ctype_le__.__ctype_be__, c_longlong)

s = c_longlong.__ctype_be__(0x1234567890ABCDEF)
        self.assertEqual(bin(struct.pack(">q", 0x1234567890ABCDEF)), "1234567890ABCDEF")
        self.assertEqual(bin(s), "1234567890ABCDEF")
        self.assertEqual(s.value, 0x1234567890ABCDEF)

s = c_longlong.__ctype_le__(0x1234567890ABCDEF)
        self.assertEqual(bin(struct.pack("<q", 0x1234567890ABCDEF)), "EFCDAB9078563412")
        self.assertEqual(bin(s), "EFCDAB9078563412")
        self.assertEqual(s.value, 0x1234567890ABCDEF)

s = c_ulonglong.__ctype_be__(0x1234567890ABCDEF)
        self.assertEqual(bin(struct.pack(">Q", 0x1234567890ABCDEF)), "1234567890ABCDEF")
        self.assertEqual(bin(s), "1234567890ABCDEF")
        self.assertEqual(s.value, 0x1234567890ABCDEF)

s = c_ulonglong.__ctype_le__(0x1234567890ABCDEF)
        self.assertEqual(bin(struct.pack("<Q", 0x1234567890ABCDEF)), "EFCDAB9078563412")
        self.assertEqual(bin(s), "EFCDAB9078563412")
        self.assertEqual(s.value, 0x1234567890ABCDEF)

def test_endian_float(self):
        if sys.byteorder == "little":
            self.assertIs(c_float.__ctype_le__, c_float)
            self.assertIs(c_float.__ctype_be__.__ctype_le__, c_float)
        else:
            self.assertIs(c_float.__ctype_be__, c_float)
            self.assertIs(c_float.__ctype_le__.__ctype_be__, c_float)
        s = c_float(math.pi)
        self.assertEqual(bin(struct.pack("f", math.pi)), bin(s))
        # Hm, what's the precision of a float compared to a double?
        self.assertAlmostEqual(s.value, math.pi, places=6)
        s = c_float.__ctype_le__(math.pi)
        self.assertAlmostEqual(s.value, math.pi, places=6)
        self.assertEqual(bin(struct.pack("<f", math.pi)), bin(s))
        s = c_float.__ctype_be__(math.pi)
        self.assertAlmostEqual(s.value, math.pi, places=6)
        self.assertEqual(bin(struct.pack(">f", math.pi)), bin(s))

def test_endian_double(self):
        if sys.byteorder == "little":
            self.assertIs(c_double.__ctype_le__, c_double)
            self.assertIs(c_double.__ctype_be__.__ctype_le__, c_double)
        else:
            self.assertIs(c_double.__ctype_be__, c_double)
            self.assertIs(c_double.__ctype_le__.__ctype_be__, c_double)
        s = c_double(math.pi)
        self.assertEqual(s.value, math.pi)
        self.assertEqual(bin(struct.pack("d", math.pi)), bin(s))
        s = c_double.__ctype_le__(math.pi)
        self.assertEqual(s.value, math.pi)
        self.assertEqual(bin(struct.pack("<d", math.pi)), bin(s))
        s = c_double.__ctype_be__(math.pi)
        self.assertEqual(s.value, math.pi)
        self.assertEqual(bin(struct.pack(">d", math.pi)), bin(s))

def test_endian_other(self):
        self.assertIs(c_byte.__ctype_le__, c_byte)
        self.assertIs(c_byte.__ctype_be__, c_byte)

self.assertIs(c_ubyte.__ctype_le__, c_ubyte)
        self.assertIs(c_ubyte.__ctype_be__, c_ubyte)

self.assertIs(c_char.__ctype_le__, c_char)
        self.assertIs(c_char.__ctype_be__, c_char)

def test_struct_fields_unsupported_byte_order(self):

fields = [
            ("a", c_ubyte),
            ("b", c_byte),
            ("c", c_short),
            ("d", c_ushort),
            ("e", c_int),
            ("f", c_uint),
            ("g", c_long),
            ("h", c_ulong),
            ("i", c_longlong),
            ("k", c_ulonglong),
            ("l", c_float),
            ("m", c_double),
            ("n", c_char),
            ("b1", c_byte, 3),
            ("b2", c_byte, 3),
            ("b3", c_byte, 2),
            ("a", c_int * 3 * 3 * 3)
        ]

# these fields do not support different byte order:
        for typ in c_wchar, c_void_p, POINTER(c_int):
            with self.assertRaises(TypeError):
                class T(BigEndianStructure if sys.byteorder == "little" else LittleEndianStructure):
                    _fields_ = fields + [("x", typ)]

def test_struct_struct(self):
        # nested structures with different byteorders

# create nested structures with given byteorders and set memory to data

for nested, data in (
            (BigEndianStructure, b'\0\0\0\1\0\0\0\2'),
            (LittleEndianStructure, b'\1\0\0\0\2\0\0\0'),
        ):
            for parent in (
                BigEndianStructure,
                LittleEndianStructure,
                Structure,
            ):
                class NestedStructure(nested):
                    _fields_ = [("x", c_uint32),
                                ("y", c_uint32)]

class TestStructure(parent):
                    _fields_ = [("point", NestedStructure)]

self.assertEqual(len(data), sizeof(TestStructure))
                ptr = POINTER(TestStructure)
                s = cast(data, ptr)[0]
                del ctypes._pointer_type_cache[TestStructure]
                self.assertEqual(s.point.x, 1)
                self.assertEqual(s.point.y, 2)

def test_struct_field_alignment(self):
        # standard packing in struct uses no alignment.
        # So, we have to align using pad bytes.
        #
        # Unaligned accesses will crash Python (on those platforms that
        # don't allow it, like sparc solaris).
        if sys.byteorder == "little":
            base = BigEndianStructure
            fmt = ">bxhid"
        else:
            base = LittleEndianStructure
            fmt = "<bxhid"

class S(base):
            _fields_ = [("b", c_byte),
                        ("h", c_short),
                        ("i", c_int),
                        ("d", c_double)]

s1 = S(0x12, 0x1234, 0x12345678, 3.14)
        s2 = struct.pack(fmt, 0x12, 0x1234, 0x12345678, 3.14)
        self.assertEqual(bin(s1), bin(s2))

def test_unaligned_nonnative_struct_fields(self):
        if sys.byteorder == "little":
            base = BigEndianStructure
            fmt = ">b h xi xd"
        else:
            base = LittleEndianStructure
            fmt = "<b h xi xd"

class S(base):
            _pack_ = 1
            _fields_ = [("b", c_byte),
                        ("h", c_short),

("_1", c_byte),
                        ("i", c_int),

("_2", c_byte),
                        ("d", c_double)]

s1 = S()
        s1.b = 0x12
        s1.h = 0x1234
        s1.i = 0x12345678
        s1.d = 3.14
        s2 = struct.pack(fmt, 0x12, 0x1234, 0x12345678, 3.14)
        self.assertEqual(bin(s1), bin(s2))

def test_unaligned_native_struct_fields(self):
        if sys.byteorder == "little":
            fmt = "<b h xi xd"
        else:
            base = LittleEndianStructure
            fmt = ">b h xi xd"

class S(Structure):
            _pack_ = 1
            _fields_ = [("b", c_byte),

("h", c_short),

("_1", c_byte),
                        ("i", c_int),

("_2", c_byte),
                        ("d", c_double)]

def test_union_fields_unsupported_byte_order(self):

# these fields do not support different byte order:
        for typ in c_wchar, c_void_p, POINTER(c_int):
            with self.assertRaises(TypeError):
                class T(BigEndianUnion if sys.byteorder == "little" else LittleEndianUnion):
                    _fields_ = fields + [("x", typ)]

def test_union_struct(self):
        # nested structures in unions with different byteorders

# create nested structures in unions with given byteorders and set memory to data

for nested, data in (
            (BigEndianStructure, b'\0\0\0\1\0\0\0\2'),
            (LittleEndianStructure, b'\1\0\0\0\2\0\0\0'),
        ):
            for parent in (
                BigEndianUnion,
                LittleEndianUnion,
                Union,
            ):
                class NestedStructure(nested):
                    _fields_ = [("x", c_uint32),
                                ("y", c_uint32)]

class TestUnion(parent):
                    _fields_ = [("point", NestedStructure)]

self.assertEqual(len(data), sizeof(TestUnion))
                ptr = POINTER(TestUnion)
                s = cast(data, ptr)[0]
                del ctypes._pointer_type_cache[TestUnion]
                self.assertEqual(s.point.x, 1)
                self.assertEqual(s.point.y, 2)

def test_build_struct_union_opposite_system_byteorder(self):
        # gh-105102
        if sys.byteorder == "little":
            _Structure = BigEndianStructure
            _Union = BigEndianUnion
        else:
            _Structure = LittleEndianStructure
            _Union = LittleEndianUnion

class S1(_Structure):
            _fields_ = [("a", c_byte), ("b", c_byte)]

class U1(_Union):
            _fields_ = [("s1", S1), ("ab", c_short)]

class S2(_Structure):
            _fields_ = [("u1", U1), ("c", c_byte)]

if __name__ == "__main__":
    unittest.main()

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