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Passing an array to a C function (using SWIG)

aiglauer aiglauer at iname.com
Sat Aug 12 18:10:26 EDT 2000 
Hi

Sorry if this is a dumb question but I have RTFM'd a fair amount in the
Embedding Guide and the SWIG manuals and segfaulted a lot more and
can't get this figured out......

I need to pass an array of floats (length only known at runtime) to a C
function (Calculation intensive recursive algorithm which is too slow
for me in Python) and then return an array of floats.

C Function definition:
float *panjer(float *probs, long maxTot)

SWIG wraps all pointers as strings - but I can't find an explanation of
how to actually get an array INTO the C function.  Can anyone help me
here?  I could probably do away with SWIG as I only have the one
function to worry about and could do this by hand - SWIG just seems
very elegant.

If I do this by hand, what would a Python List/Array look like if I
pass it to my C function and how would I do this?  I saw a previous
thread which said you could use the C API to read the paramaters one by
one - anyone have details?

Thanks
Alexis


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