[Python-Dev] Documenting the ssize_t Python C API changes
"Martin v. Löwis"
martin at v.loewis.de
Tue Mar 21 16:11:35 CET 2006
Fredrik Lundh wrote:
> I've posted a simple-minded source scanner here:
>
> http://svn.effbot.python-hosting.com/stuff/sandbox/python/ssizecheck.py
Great job! I've added a link to that to the PEP.
There are two improvements you could make:
- Some of the functions in the first list return Py_ssize_t; calling
them can cause truncation if the result value is larger than INT_MAX
(and it is assigned to an int). To find those functions, do
grep 'PyAPI_FUNC(Py_ssize_t)' Include/*.h
- Usage of the "old" function pointer type name (e.g. intobjargproc)
likely also indicates an error, since many of these pointers have
changed there types. I believe the only exception for this is inquiry,
which still has legit uses, in nb_nonzero, tp_clear, and tp_is_gc.
Regards,
Martin
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