def _cast_ptr2(x, _type):
if isinstance(x, ffi.CData):
if (_type.item == ffi.typeof(x) or
(_type.item.cname == 'void' and ffi.typeof(x).kind in
['struct', 'union'])):
return ffi.addressof(x), x
return x, x
if isinstance(x, _collections.Iterable):
if _type.item.kind == 'pointer':
ptrs = [_cast_ptr(i, _type.item) for i in x]
ret = ffi.new(_type.item.cname+'[]', [i for i, _ in ptrs])
_weakkey_dict[ret] = tuple(i for _, i in ptrs if i != ffi.NULL)
else:
ret = ffi.new(_type.item.cname+'[]', x)
return ret, ret
return ffi.cast(_type, x), x
def _new(ctype, **kwargs):
_type = ffi.typeof(ctype)
# keep only valued kwargs
kwargs = {k: kwargs[k] for k in kwargs if kwargs[k]}
# cast pointer
ptrs = {}
pfns = {}
pcs = {}
for k, v in kwargs.items():
# convert tuple pair to dict
ktype = dict(_type.fields)[k].type
if k == 'pCode':
pcs[k] = ffi.cast('uint32_t*', ffi.from_buffer(v))
elif k.startswith('pfn'):
pfn_name = _get_pfn_name(ctype)
mod = sys.modules[__name__]
setattr(mod, '_internal_' + pfn_name, v)
pfns[k] = getattr(mod, '_external_' + pfn_name)
elif ktype.kind == 'pointer':
ptrs[k] = _cast_ptr(v, ktype)
# init object
init = dict(kwargs, **{k: v for k, (v, _) in ptrs.items()})
init.update(pfns)
init.update(pcs)
ret = ffi.new(_type.cname + '*', init)[0]