[cffi-devel] passing a list of numbers to double *
Hi, I have a function that looks like this: void myfunction(const double *values, int num_values); that expects a C array of doubles along with its length. SWIG generated the CFFI interface (cffi:defcfun ("myfunction" myfunction) :void (values :pointer) (num_values :int)) Imagine that I have a list '(1d0 2d0 3d0). What is the easiest way to call this function with these values? I am reading the CFFI documentation, but could not find this, sorry if this is an obvious question, just please point me in the right direction. Thanks, Tamas
On Wed, 2007-05-16 at 16:25 -0400, Tamas K Papp wrote:
I am reading the CFFI documentation, but could not find this, sorry if this is an obvious question, just please point me in the right direction.
Look at with-foreign-object. I have been doing other things so am not up to speed on newtypes, but there should be something there as powerful as specializing expand-to-foreign-dyn, if you need to pass double*s often. Don't trust the binding generator: see chapter 4, "Wrapper generators". -- ;;; Stephen Compall ** http://scompall.nocandysw.com/blog ** Failure to imagine vast possibilities usually stems from a lack of imagination, not a lack of possibility.
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Stephen Compall -
Tamas K Papp