Joakim Hove, 18.02.2011 09:29:
I wonder if I am encountering a bug in ctypes; or if I am doing things
wrong? I have written a small Python class wrapping a C library, the
Python class has a from_param() method which passes a "raw pointer
value" from Python to C. When reaching C the pointer has been
truncated to 32 bits.
I have written a quite extensive post about this on Stackoverflow:
http://www.stackoverflow.com/q/5029341/421889/ - so far without
response. Would have been very glad if anyone could indicate if this
was a bug on my part, or if it is a ctypes bug.
I rarely use ctypes and I actually don't know how this specific case works.
However, you are not providing a function signature for the "print_addr" C
function in the BugTest case, so my guess is that it assumes the standard
signature for C functions, which is "int func(int)". That would explain the
32bit truncation.
Stefan
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