def new_array_type(space, w_ctptr, w_length):
if not isinstance(w_ctptr, ctypeptr.W_CTypePointer):
raise OperationError(space.w_TypeError,
space.wrap("first arg must be a pointer ctype"))
ctitem = w_ctptr.ctitem
if ctitem.size < 0:
raise oefmt(space.w_ValueError, "array item of unknown size: '%s'",
ctitem.name)
if space.is_w(w_length, space.w_None):
length = -1
arraysize = -1
extra = '[]'
else:
length = space.getindex_w(w_length, space.w_OverflowError)
if length < 0:
raise OperationError(space.w_ValueError,
space.wrap("negative array length"))
try:
arraysize = ovfcheck(length * ctitem.size)
except OverflowError:
raise OperationError(
space.w_OverflowError,
space.wrap("array size would overflow a ssize_t"))
extra = '[%d]' % length
#
ctype = ctypearray.W_CTypeArray(space, w_ctptr, length, arraysize, extra)
return ctype
def _new_array_type(space, w_ctptr, length):
_setup_wref(rweakref.has_weakref_support())
if not isinstance(w_ctptr, ctypeptr.W_CTypePointer):
raise oefmt(space.w_TypeError, "first arg must be a pointer ctype")
arrays = w_ctptr._array_types
if arrays is None:
arrays = rweakref.RWeakValueDictionary(int, ctypearray.W_CTypeArray)
w_ctptr._array_types = arrays
else:
ctype = arrays.get(length)
if ctype is not None:
return ctype
#
ctitem = w_ctptr.ctitem
if ctitem.size < 0:
raise oefmt(space.w_ValueError, "array item of unknown size: '%s'",
ctitem.name)
if length < 0:
assert length == -1
arraysize = -1
extra = '[]'
else:
try:
arraysize = ovfcheck(length * ctitem.size)
except OverflowError:
raise oefmt(space.w_OverflowError,
"array size would overflow a ssize_t")
extra = '[%d]' % length
#
ctype = ctypearray.W_CTypeArray(space, w_ctptr, length, arraysize, extra)
arrays.set(length, ctype)
return ctype
def _new_array_type(space, w_ctptr, length):
unique_cache = space.fromcache(UniqueCache)
unique_key = (w_ctptr, length)
try:
return unique_cache.arrays[unique_key]
except KeyError:
pass
#
if not isinstance(w_ctptr, ctypeptr.W_CTypePointer):
raise OperationError(space.w_TypeError,
space.wrap("first arg must be a pointer ctype"))
ctitem = w_ctptr.ctitem
if ctitem.size < 0:
raise oefmt(space.w_ValueError, "array item of unknown size: '%s'",
ctitem.name)
if length < 0:
assert length == -1
arraysize = -1
extra = '[]'
else:
try:
arraysize = ovfcheck(length * ctitem.size)
except OverflowError:
raise OperationError(
space.w_OverflowError,
space.wrap("array size would overflow a ssize_t"))
extra = '[%d]' % length
#
ctype = ctypearray.W_CTypeArray(space, w_ctptr, length, arraysize, extra)
unique_cache.arrays[unique_key] = ctype
return ctype
