def newp(self, w_init):
from pypy.module._cffi_backend.ctypestruct import W_CTypeStructOrUnion
space = self.space
ctitem = self.ctitem
datasize = ctitem.size
if datasize < 0:
raise oefmt(space.w_TypeError,
"cannot instantiate ctype '%s' of unknown size",
self.name)
if isinstance(ctitem, W_CTypeStructOrUnion):
# 'newp' on a struct-or-union pointer: in this case, we return
# a W_CDataPtrToStruct object which has a strong reference
# to a W_CDataNewOwning that really contains the structure.
#
if ctitem.with_var_array and not space.is_w(w_init, space.w_None):
datasize = ctitem.convert_struct_from_object(
lltype.nullptr(rffi.CCHARP.TO), w_init, datasize)
#
cdatastruct = cdataobj.W_CDataNewOwning(space, datasize, ctitem)
cdata = cdataobj.W_CDataPtrToStructOrUnion(space,
cdatastruct._cdata,
self, cdatastruct)
else:
if self.is_char_or_unichar_ptr_or_array():
datasize *= 2 # forcefully add a null character
cdata = cdataobj.W_CDataNewOwning(space, datasize, self)
#
if not space.is_w(w_init, space.w_None):
ctitem.convert_from_object(cdata._cdata, w_init)
keepalive_until_here(cdata)
return cdata
def newp(self, w_init, allocator):
from pypy.module._cffi_backend.ctypestruct import W_CTypeStructOrUnion
space = self.space
ctitem = self.ctitem
datasize = ctitem.size
if datasize < 0:
raise oefmt(space.w_TypeError,
"cannot instantiate ctype '%s' of unknown size",
self.name)
if isinstance(ctitem, W_CTypeStructOrUnion):
# 'newp' on a struct-or-union pointer: in this case, we return
# a W_CDataPtrToStruct object which has a strong reference
# to a W_CDataNewOwning that really contains the structure.
#
varsize_length = -1
ctitem.force_lazy_struct()
if ctitem._with_var_array:
if not space.is_w(w_init, space.w_None):
datasize = ctitem.convert_struct_from_object(
lltype.nullptr(rffi.CCHARP.TO), w_init, datasize)
varsize_length = datasize
#
cdatastruct = allocator.allocate(space,
datasize,
ctitem,
length=varsize_length)
ptr = cdatastruct.unsafe_escaping_ptr()
cdata = cdataobj.W_CDataPtrToStructOrUnion(space, ptr, self,
cdatastruct)
else:
if self.is_char_or_unichar_ptr_or_array():
datasize *= 2 # forcefully add a null character
cdata = allocator.allocate(space, datasize, self)
#
if not space.is_w(w_init, space.w_None):
with cdata as ptr:
ctitem.convert_from_object(ptr, w_init)
return cdata