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 copy_and_convert_to_object(self, source):
space = self.space
self.check_complete()
ob = cdataobj.W_CDataNewOwning(space, self.size, self)
with ob as target:
misc._raw_memcopy(source, target, self.size)
return ob
def copy_and_convert_to_object(self, cdata):
space = self.space
self.check_complete()
ob = cdataobj.W_CDataNewOwning(space, self.size, self)
misc._raw_memcopy(cdata, ob._cdata, self.size)
keepalive_until_here(ob)
return ob
def newp(self, w_init):
space = self.space
datasize = self.size
#
if datasize < 0:
from pypy.module._cffi_backend import misc
w_init, length = misc.get_new_array_length(space, w_init)
try:
datasize = ovfcheck(length * self.ctitem.size)
except OverflowError:
raise OperationError(
space.w_OverflowError,
space.wrap("array size would overflow a ssize_t"))
#
cdata = cdataobj.W_CDataNewOwningLength(space, datasize, self,
length)
#
else:
cdata = cdataobj.W_CDataNewOwning(space, datasize, self)
#
if not space.is_w(w_init, space.w_None):
self.convert_from_object(cdata._cdata, w_init)
keepalive_until_here(cdata)
return cdata