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-rw-r--r--scripts/external_libs/zmq/utils/interop.py33
1 files changed, 33 insertions, 0 deletions
diff --git a/scripts/external_libs/zmq/utils/interop.py b/scripts/external_libs/zmq/utils/interop.py
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--- /dev/null
+++ b/scripts/external_libs/zmq/utils/interop.py
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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.
+
+
+try:
+ long
+except NameError:
+ long = int # Python 3
+
+
+def cast_int_addr(n):
+ """Cast an address to a Python int
+
+ This could be a Python integer or a CFFI pointer
+ """
+ if isinstance(n, (int, long)):
+ return n
+ try:
+ import cffi
+ 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("Cannot cast %r to int" % n)