def __extract_member(self, cexpr, obj, offset, parents, parents_type):
parent = parents[0]
if parents_type[0] == 'cast':
default_tinfo = parent.type
cexpr = parent
del parents_type[0]
del parents[0]
else:
default_tinfo = const.PX_WORD_TINFO
if parents_type[0] in ('idx', 'ptr'):
if parents_type[1] == 'cast':
default_tinfo = parents[1].type
cexpr = parents[0]
del parents_type[0]
del parents[0]
else:
default_tinfo = self.__deref_tinfo(default_tinfo)
if parents_type[1] == 'asg':
if parents[1].x == parents[0]:
# *(TYPE *)(var + x) = ???
obj_ea = self.__extract_obj_ea(parents[1].y)
return self._get_member(offset, cexpr, obj,
parents[1].y.type, obj_ea)
return self._get_member(offset, cexpr, obj, parents[1].x.type)
elif parents_type[1] == 'call':
if parents[1].x == parents[0]:
# ((type (__some_call *)(..., ..., ...)var[idx])(..., ..., ...)
# ((type (__some_call *)(..., ..., ...)*(TYPE *)(var + x))(..., ..., ...)
return self._get_member(offset, cexpr, obj,
parents[0].type)
_, tinfo = helper.get_func_argument_info(
parents[1], parents[0])
if tinfo is None:
tinfo = const.PCHAR_TINFO
return self._get_member(offset, cexpr, obj, tinfo)
return self._get_member(offset, cexpr, obj, default_tinfo)
elif parents_type[0] == 'call':
# call(..., (TYPE)(var + x), ...)
tinfo = self._parse_call(parents[0], cexpr, offset)
return self._get_member(offset, cexpr, obj, tinfo)
elif parents_type[0] == 'asg':
if parents[0].y == cexpr:
# other_obj = (TYPE) (var + offset)
self._parse_left_assignee(parents[1].x, offset)
return self._get_member(offset, cexpr, obj,
self.__deref_tinfo(default_tinfo))
def _parse_call(self, call_cexpr, arg_cexpr, offset):
_, tinfo = helper.get_func_argument_info(call_cexpr, arg_cexpr)
if tinfo:
return self.__deref_tinfo(tinfo)
# TODO: Find example with UTF-16 strings
return const.CHAR_TINFO