On Thursday, 10 July 2014 at 12:12:20 UTC, Marc Schütz wrote:
On Wednesday, 9 July 2014 at 15:09:08 UTC, Chris wrote:
On Wednesday, 9 July 2014 at 15:00:25 UTC, seany wrote:
I apologize many times for this question, may be this had
already been answered somewhere, but considering today the
last of my nerve is broken, I can not really find the soution.
So I have a D code, which acts as a central manager of all my
codes, reads user input, reads files, etc, and based on the
file readouts, I would like to pass some variables from the D
code to a fortran code, in binary format, perhaps, if such a
thing exists, instead of encoding to text/ ASCII first.
I would also like to read some (not all) variables back from
the fortran code.
The Fortran code resides in a subdirectory to the
path/to/d/code
How to do this? is there a preffered way / easier than system
call way to interface D and Fortran code? This must be Fortan
code - these are the standard atmospheric chemistry codes.
I apologize again if the question is stupid, trust me, today
all my nerves are broken.
Off the top of my head I'd say you could try to interface
Fortran and C. Then you could interface D and C, i.e. D > C >
Fortran.
http://fortranwiki.org/fortran/show/Generating+C+Interfaces
https://gcc.gnu.org/onlinedocs/gcc-3.4.4/g77/C-Interfacing-Tools.html
To expand on that:
You don't actually need to write a C glue layer between D and
Fortran. All you need to do is make your Fortran functions
accessible for C code. As I'm not familiar with Fortran, I
don't know how exactly that works, but it could involve telling
the compiler to use the right calling convention, and use the
right name mangling.
If you are able to use Fortran 2003 or later, Fortran's
iso_c_binding makes it simple to expose Fortran functions to be
called from C and vice versa. I don't know of any good online
references, but a lot of good examples can be found in
the source for the Fortran interface to the GSL:
http://www.lrz.de/services/software/mathematik/gsl/fortran/index.html
An example of compiling and linking:
http://compgroups.net/comp.lang.fortran/usage-of-iso_c_binding/155309
If iso_c_binding is not available, then it's not as pretty:
http://www.yolinux.com/TUTORIALS/LinuxTutorialMixingFortranAndC.html
