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# memoryview is mainly implemented in C

from python_cext import PyTruffle_SetAttr

c_memoryview_module = None

def __memoryview_init(self, *args, **kwargs):

import _memoryview

global c_memoryview_module

c_memoryview_module = _memoryview

PyTruffle_SetAttr(memoryview, "__init__", __memoryview_init2)

return __memoryview_init2(self, *args, **kwargs)

def __memoryview_init2(self, *args, **kwargs):

# NOTE: DO NOT CHANGE THE NAME OF PROPERTY '__c_memoryview'

# it is also referenced in native code and Java code

if args and isinstance(args[0], c_memoryview_module.nativememoryview):

# wrapping case

PyTruffle_SetAttr(self, "__c_memoryview", args[0])

else:

PyTruffle_SetAttr(self, "__c_memoryview", c_memoryview_module.nativememoryview(*args, **kwargs))

def __memoryview_getitem(self, key):

res = self.__c_memoryview.__getitem__(key)

return memoryview(res) if isinstance(res, type(self.__c_memoryview)) else res

getsetdescriptor = type(type(__memoryview_init).__code__)

def make_property(name):

def getter(self):

return getattr(self.__c_memoryview, name)

error_string = "attribute '%s' of 'memoryview' objects is not writable" % name

def setter(self, value):

raise AttributeError(error_string)

return getsetdescriptor(fget=getter, fset=setter, name=name, owner=memoryview)

for p in ["nbytes", "readonly", "itemsize", "format", "ndim", "shape", "strides",

"suboffsets", "c_contiguous", "f_contiguous", "contiguous"]:

setattr(memoryview, p, make_property(p))

def make_delegate0(p):

def delegate(self):

return getattr(self.__c_memoryview, p)()

delegate.__name__ = p

return delegate

for p in ["__repr__", "__len__", "release", "tobytes", "hex", "tolist", "__enter__"]:

setattr(memoryview, p, make_delegate0(p))

# other delegate methods

memoryview.__init__ = __memoryview_init

memoryview.__getitem__ = __memoryview_getitem

memoryview.__setitem__ = lambda self, key, value: self.__c_memoryview.__setitem__(key, value)

memoryview.cast = lambda self, *args: memoryview(self.__c_memoryview.cast(*args))

memoryview.__exit__ = lambda self, exc_type, exc_value, traceback: self.__c_memoryview.__exit__(exc_type, exc_value, traceback)