from ctypes import Structure, c_ulong, POINTER, cast, py_object, c_long

from common import get_object_field_or_null, EMPTY, DUMMY

class PyDictEntry(Structure):

_fields_ = [

('me_hash', c_long),

('me_key', py_object),

('me_value', py_object),

]

class PyDictObject(Structure):

_fields_ = [

('ob_refcnt', c_ulong),

('ob_type', c_ulong),

('ma_fill', c_ulong),

('ma_used', c_ulong),

('ma_mask', c_ulong),

('ma_table', POINTER(PyDictEntry)),

]

def dictobject(d):

return cast(id(d), POINTER(PyDictObject)).contents

d = {0: 0}

del d[0]

dummy_internal = dictobject(d).ma_table[0].me_key

del d

def dump_py_dict(d):

do = dictobject(d)

keys = []

hashes = []

values = []

size = do.ma_mask + 1

for i in range(size):

key = get_object_field_or_null(do.ma_table[i], 'me_key')

keys.append(key if key is not dummy_internal else DUMMY)

for i, key in enumerate(keys):

if key is EMPTY:

hashes.append(EMPTY)

values.append(EMPTY)

else:

hashes.append(do.ma_table[i].me_hash)

values.append(get_object_field_or_null(do.ma_table[i], 'me_value'))

return hashes, keys, values, do.ma_fill, do.ma_used