ctypes shared object FILE*

[Dog Walker]

I need to call a function in a shared object with this signature:
init_dialog(FIL E *input, FILE *output)
The FILE*'s are to stdin and stdout.

The call from python is libdialog.init_ dialog( x, y)
I need to define x and y so that they will have the structure of
sys.stdin and sys.stdout; the called function (init_dialog) is using a
(std?) function fileno to extract the fileno from the FILE* describing
stdin and stdout.
How can I do this?

--
I have seen the future and I'm not in it!

[Aaron Brady]

Re: ctypes shared object FILE*

On Nov 8, 6:34 pm, "Dog Walker" <thud...@gmail. comwrote:

I need to call a function in a shared object with this signature:
init_dialog(FIL E *input, FILE *output)
The FILE*'s are to stdin and stdout.
>
The call from python is libdialog.init_ dialog( x, y)
I need to define x and y so that they will have the structure of
sys.stdin and sys.stdout; the called function (init_dialog) is using a
(std?) function fileno to extract the fileno from the FILE* describing
stdin and stdout.
How can I do this?
>
--
I have seen the future and I'm not in it!

sys.stdin and sys.stdout have a 'fileno' method, which returns an
integer.

FILE* PyFile_AsFile(P yObject *p)
Return the file object associated with p as a FILE*.

This might be what you want. You need to inform the function of what
types to expect and return.

>>import sys
>>import ctypes
>>ctypes.python api.PyFile_AsFi le.argtypes= [ ctypes.py_objec t ]
>>ctypes.python api.PyFile_AsFi le.restype= ctypes.c_void_p
>>ctypes.python api.PyFile_AsFi le( sys.stdin )

2019259304

>>ctypes.python api.PyFile_AsFi le( sys.stdout )

2019259336

But I'm confused why PyFile_AsFile didn't return a c_void_p as I
asked.