def test_pointer_identity(self):
from _rawffi.alt import types
x = types.Pointer(types.slong)
y = types.Pointer(types.slong)
z = types.Pointer(types.char)
assert x is y
assert x is not z
def test_pointer_to_incomplete_struct(self):
from _rawffi.alt import _StructDescr, Field, types
longsize = types.slong.sizeof()
fields = [
Field('x', types.slong),
Field('y', types.slong),
]
descr = _StructDescr('foo')
foo_ffitype = descr.ffitype
foo_p = types.Pointer(descr.ffitype)
assert foo_p.deref_pointer() is foo_ffitype
descr.define_fields(fields)
assert descr.ffitype is foo_ffitype
assert foo_p.deref_pointer() is foo_ffitype
assert types.Pointer(descr.ffitype) is foo_p
def test_typed_pointer(self):
from _rawffi.alt import types
intptr = types.Pointer(types.sint) # create a typed pointer to sint
assert intptr.deref_pointer() is types.sint
assert str(intptr) == '<ffi type (pointer to sint)>'
assert types.sint.deref_pointer() is None
raises(TypeError, "types.Pointer(42)")
def _CData_output(self, resarray, base=None, index=-1):
from _rawffi.alt import types
# If a char_p or unichar_p is received, skip the string interpretation
if base._ffiargtype != types.Pointer(types.char_p) and \
base._ffiargtype != types.Pointer(types.unichar_p):
# this seems to be a string if we're array of char, surprise!
from ctypes import c_char, c_wchar
if self._type_ is c_char:
return _rawffi.charp2string(resarray.buffer, self._length_)
if self._type_ is c_wchar:
return _rawffi.wcharp2unicode(resarray.buffer, self._length_)
res = self.__new__(self)
ffiarray = self._ffiarray.fromaddress(resarray.buffer, self._length_)
res._buffer = ffiarray
if base is not None:
res._base = base
res._index = index
return res
def test_char_p_cached(self):
from _rawffi.alt import types
x = types.Pointer(types.char)
assert x is types.char_p
x = types.Pointer(types.unichar)
assert x is types.unichar_p
