ctypesForFortran

This module facilitates the interfacing with python of FORTRAN code compiled and assembled in a shared library.

The signature of FORTRAN routines is provided in the form of a list of python objects; this signature is used by the module to call the FORTRAN routine and return its result.

In addition to the full example available in the docstring of the main file, here's a simple example.

The FORTRAN source code (compiled and linked to produce the foo.so shared lib):

SUBROUTINE FOO(KIN, KOUT)
  INTEGER(KIND=4), INTENT(IN) :: KIN
  INTEGER(KIND=4), INTENT(OUT) :: KOUT
  KOUT = KIN + 1
  PRINT*, KIN, KOUT
END SUBROUTINE FOO

The python code:

import numpy
import ctypesForFortran

IN = ctypesForFortran.IN
OUT = ctypesForFortran.OUT
INOUT = ctypesForFortran.INOUT

ctypesFF, handle = ctypesForFortran.ctypesForFortranFactory("./foo.so")

@ctypesFF()
def foo(KIN):
    return ([KIN],
            [(numpy.int32, None, IN), #KIN
             (numpy.int32, None, OUT)], #KOUT
            None)

assert foo(4) == 5