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[Python-Dev] Convert int() to size_t in Python/C

Marcos Dione mdione at grulic.org.ar
Fri Apr 29 10:45:04 EDT 2016 
    First of all, I'm not subbscribed to the list (too much traffic for
me), so please CC: me in any answers if possible.

    I'm trying to add a new syscall to the os module:

https://bugs.python.org/issue26826

    One of the few missing parts is to cenvert a parameter, which would
be a Python int object using PyArg_ParseTupleAndKeywords() to a size_t
variable. For something similar, the 'n' format exists, but that one
converts to Py_ssize_t (which is ssize_t, really), but that one is
signed.

    One possible solution hat was suggested to me in the #python IRC
channel was to use that, then test if the resulting value is negative,
and adjust accordingly, but I wonder if there is a cleaner, more general
solution (for instance, what if the type was something else, like loff_t,
although for that one in particular there *is* a convertion
function/macro).

-- 
(Not so) Random fortune:
Premature optimization is the root of all evil.
	    -- Donald Knuth
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