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- """Utils for interoperability with other libraries.
- Just CFFI pointer casting for now.
- """
- # Copyright (C) PyZMQ Developers
- # Distributed under the terms of the Modified BSD License.
- from typing import Any
- def cast_int_addr(n: Any) -> int:
- """Cast an address to a Python int
- This could be a Python integer or a CFFI pointer
- """
- if isinstance(n, int):
- return n
- try:
- import cffi # type: ignore
- except ImportError:
- pass
- else:
- # from pyzmq, this is an FFI void *
- ffi = cffi.FFI()
- if isinstance(n, ffi.CData):
- return int(ffi.cast("size_t", n))
- raise ValueError(f"Cannot cast {n!r} to int")
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