def __getitem__(self, i):
if isinstance(i, tuple):
result = ""
source = bytes(self)
for s in i:
result += source[s]
return result
elif isinstance(i, slice):
if i.step is not None:
i = i.indices(len(self))
start = i[0]
stop = i[1]
if stop <= start:
return ""
buf = ctypes.create_string_buffer(stop - start)
ctypes.memmove(
buf, core.BNGetDataBufferContentsAt(self.handle, start),
stop - start)
return buf.raw
else:
return bytes(self)[i]
elif i < 0:
if i >= -len(self):
return chr(
core.BNGetDataBufferByte(self.handle, int(len(self) + i)))
raise IndexError("index out of range")
elif i < len(self):
return chr(core.BNGetDataBufferByte(self.handle, int(i)))
else:
raise IndexError("index out of range")
def __setitem__(self, i, value):
if isinstance(i, slice):
if i.step is not None:
raise IndexError("step not supported on assignment")
i = i.indices(len(self))
start = i[0]
stop = i[1]
if stop < start:
stop = start
if len(value) != (stop - start):
data = bytes(self)
data = data[0:start] + value + data[stop:]
core.BNSetDataBufferContents(self.handle, data, len(data))
else:
value = str(value)
buf = ctypes.create_string_buffer(value)
ctypes.memmove(
core.BNGetDataBufferContentsAt(self.handle, start), buf,
len(value))
elif i < 0:
if i >= -len(self):
if len(value) != 1:
raise ValueError("expected single byte for assignment")
value = str(value)
buf = ctypes.create_string_buffer(value)
ctypes.memmove(
core.BNGetDataBufferContentsAt(self.handle,
int(len(self) + i)), buf, 1)
else:
raise IndexError("index out of range")
elif i < len(self):
if len(value) != 1:
raise ValueError("expected single byte for assignment")
value = str(value)
buf = ctypes.create_string_buffer(value)
ctypes.memmove(core.BNGetDataBufferContentsAt(self.handle, int(i)),
buf, 1)
else:
raise IndexError("index out of range")