CFFI, the Common Foreign Function Interface, for Common Lisp. For Python CFFI, see the [python-cffi] tag.
CFFI, the Common Foreign Function Interface, purports to be a portable foreign function interface for Common Lisp.
Check out Homepage
Questions tagged [cffi]
142 questions
0
votes
1 answer
Path cannot contain slash
I'm trying to make unit testing in C using Python and CFFI module. It's pretty much working, but I can't use it into a sub directory.
While testing, my project looks like :
$ tree tests
tests/
├── sum.c
├── sum.h
├── tests_units.py
...
$ python3…
Pyrrha
- 159
- 2
- 12
0
votes
1 answer
setuptools and cffi: how to change the library path
i am creating a python program with cffi to test my C/ASM library against the real libc functions.
i try to use setuptools to setup my different cffi modules. so here is my filetree:
here is my libftasm_builder.py:
from cffi import FFI
ffiBuilder…
Stephane
- 153
- 1
- 10
0
votes
1 answer
Calling a fortran dll from python using cffi
I am currently working on a simultion-tool that requires a PDE Solver from a Fortran dll. In order to figure how calling a dll from python I used a simpler function from the same dll but can't get it to work.
Systemspecs:
Windows 7 Professional…
ThlHckmnn
- 5
- 4
0
votes
0 answers
Python flush ouput is not working with cffi library
I have a weird behaviour using a Python application, (running under supervisor), that relies on a C library to initialize a component.
My problem is that i cannot see the output printed by this C library when i call a function there.
All the output…
Wenzel
- 147
- 1
- 14
0
votes
1 answer
Comparing C pointers in Python
I am looking for an easier way to compare the data at two C-pointers in python. The method I have working now:
import cffi
ffi = cffi.FFI()
def ref_char_p(char_p):
arr = []
null_term = 0;
while(char_p[null_term] != 0):
…
Jlegend
- 531
- 1
- 6
- 19
0
votes
1 answer
Receiving CFFI missing while install Google Assistant SDK Samples
I am trying to add voice recognition to my Raspberry Pi 3B using this guide.
I have made it to this part until the command below through ssh and getting some kind of CFFI missing error. I have repeated the above webpage replacing python with python3…
0
votes
0 answers
Variable not found in library when importing with CFFI
I am trying to load the following .h file:
3 typedef struct {
4 uint8_t clock_pin;
5 } pinout;
6
7 pinout foo = {.clock_pin = 5};
8 pinout bar = {.clock_pin = 4};
Using the following python file:
1 from pathlib import Path
2 import cffi
3
4…
user2886057
- 646
- 1
- 5
- 15
0
votes
1 answer
Memory leaks in PyQt w/ QImage in a loop
I'm working on a Python application right now that uses PyQt5 and CFFI bindings to libgphoto2.
I have this section of code that will poll the camera every 1/60 of a second to get a preview image and then schedule to draw it on the screen.
def…
Benjamin
- 1,223
- 1
- 13
- 22
0
votes
1 answer
Passing byte array data from C++ to Haxe
We are trying to pass a raw data from C++ to Haxe, but we had a lot of trebles.
We tried this solution http://community.openfl.org/t/passing-bytes-from-c-to-haxe/8046/2 but was not working for us.
C++
void Clazz::func(unsigned char *data, int…
HocineHamdi
- 191
- 6
0
votes
2 answers
Creating cdata of type `REAL (* vertices)[DIM]` in CFFI
I'm trying to build a python interface around some existing C code with CFFI. As usual with C code trimmed for performance, it is fraught with extensive macros and typedefs.
ATM I am working on replicating following struct
#define DIM 3
typedef…
PeterE
- 5,715
- 5
- 29
- 51
0
votes
0 answers
how to get C type definition string from ctypes object?
I want a generic function that can cast a ctypes object to a cffi object.
It might looks like below
def ctypestocffi(ctypes_obj):
return ffi.cast(get_type_definition(ctypes_obj),…
12412316
- 725
- 7
- 17
0
votes
1 answer
How to install Cffi python module on Windows 7 64-bit?
Is there a way to start working with cffi in the Windows 7 64-bit environment without using the MinGW ? What all packages need to be installed for the same?
user39602
- 339
- 2
- 5
- 13
0
votes
0 answers
SWIG [C++ to LISP(CFFI)] how to get array in C++ wrap into CFFI list?
I have a simple C++ function that returns an array of int (as a pointer (int*)) and when the wrapping is done CFFI see it as a pointer. It's logical but what I want is CFFI see it as a list. Is there a way to do it in SWIG configuration?
int*…
Geoffroy Zoetardt
- 43
- 3
0
votes
0 answers
Using cl-glfw3 on windows
I'm trying to load the library cl-glfw3 with sbcl amd64 for windows. But all I've got is a message with a missing dll. The libffi-6.dll and glfw3.dll are on the same folder that the lisp program.
* (ql:quickload "cl-glfw3")
To load "cl-glfw3":
…
Victor Marzo
- 713
- 5
- 10
0
votes
1 answer
common-lisp cffi evaluation order when used with progn
I have created a simple shared library in C with just one function :
void sayHello () {
printf ("Hello World\n");
}
Then, after compiling, I loaded that library into a lisp program using cffi :
(cffi:define-foreign-library libtest1
(t…
RKS
- 309
- 1
- 6