Re: Re: Matrix column access

>>>>> "Nicolas" == Nicolas Neuss <[email protected]> writes:

    Nicolas> Raymond Toy <[email protected]> writes:
    >> Not quite sure what you mean by automating the process of making the
    >> routines available.  Someone has to figure out the function signature
    >> to tell Lisp how to call it.  And some of the functions take
    >> characters or strings, and that is very dependent on the Fortran
    >> compiler.  Same with returning complex values.

    Nicolas> Does this mean that interfacing to Fortran libraries is ill-defined?  Maybe
    Nicolas> one should use the C-interface of BLAS/LAPACK then?

Perhaps.  Replacing them all would be quite a bit of work, though.  Is
the C interface just that and you still have to use Fortran for 
BLAS/LAPACK, so you get another layer?

I think the standard used by Matlisp is the standard for the old
portable f77 compiler, which is used by g77 and Sun f77, so it's not
so bad.  I suspect that I'm the only one who uses something other than
g77, and I don't do that very often either.

For the record, Fortran strings are represented as basically C
strings, and the length of the string is appended to the list of
parameters.  Functions returning complex values actually insert a new
parameter into the arg list and this parameter is a pointer to where
the complex value should be stored.  This is probably how the C
interface works.

Ray





-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click