| """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") | |