[Python-Dev] Re: Unpacking native bools in the struct module: Is Python relying on undefined behavior?

Quick and obvious fix:

static PyObject * nu_bool(const char *p, const formatdef *f) { char x; memcpy((char *)&x, p, sizeof x); return PyBool_FromLong(x != 0); }

Which is optimized to static PyObject * nu_bool(const char *p, const formatdef *f) { return PyBool_FromLong(*p != 0); }