[cffi-devel] CFFI and FORTRAN CHARACTER*(*)

[Juan Jose Garcia-Ripoll]

CHARACTERs in Fortran are just pointers of type char*, just like in C, and
just like any other fortran array. There is no terminating null and the
fortran functions get the length either from some argument or because they
assume a given size (for instance in Lapack it is a one-character string
what the function expects)

On Sat, Jun 5, 2010 at 12:45 PM, Tamas K Papp <tkpapp at gmail.com> wrote:

> Hi,
>
> I am trying to call the FORTRAN routine ILAENV in LAPACK [1] from CL,
> using CFFI.  It has CHARACTER*(*) arguments, and I am not sure how to
> handle these.  I found a lot of conflicting information on the web,
> including examples which used C-style zero-terminated strings [2], and
> others which mention string length as an extra argument to the
> function.
>
> Any kind of guidance on how to do this would be appreciated.
>
> Thanks,
>
> Tamas
>
> [1] http://www.netlib.org/lapack/util/ilaenv.f
> [2] http://www.ualberta.ca/AICT/RESEARCH/LinuxClusters/doc/acml350/
> ILAENV_002dILAENVSET.html
>
>
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