Walter Bright:
> Ok, does this work:
>
> p = libc.malloc(100);
> *p = 3;
>
> ? Or this:
>
> struct S { int a; char b; };
> S s;
> libc.fillInS(&s);
The purpose of ctypes is to interface Python with C libs, it's a quite well
designed piece of software engineering. This is how you can do what you ask for:
from ctypes import POINTER, Structure, cdll, c_int, c_char
libc = cdll.msvcrt # on Windows
# libc = CDLL("libc.so.6") # on linux
malloc = libc.malloc
malloc.restype = POINTER(c_int)
p = malloc(100)
p[0] = 3
#-----------------
class S(Structure):
_fields_ = [("a", c_int), ("b", c_char)]
s = S()
# AttributeError: function 'fillInS' not found
libc.fillInS(byref(s))
Bye,
bearophile
