[GRASS-user] Question with Python-SWIG example [SEC=UNCLASSIFIED]

Andrew MacIntyre Andrew.MacIntyre at acma.gov.au
Tue May 11 20:58:50 EDT 2010


Bah! typo...

> > But I still don't see what happens when a function returns a CELL*
> > which is subsequently passed to a function accepting a void*, or
> > vice-versa. This is common enough that if SWIG can't handle it, we
> > need to use something other than SWIG.
> 
> That seems to be what the SWIG Pointer Library function ptrcast() is
> for,
> according to http://www.swig.org/Doc1.1/HTML/Typemaps.html, so
> something like (in Python):
> 
> 	import GrassMod
> 	pCELL = GrassMod.Returns_CELLptr()
> 	pvoid = GrassMod.castptr(pCELL, "void *")

above line should read:
 	pvoid = GrassMod.ptrcast(pCELL, "void *")

>  	result = GrassMod.Takes_voidptr(pvoid)
> 
> (substitute the correct name of the GRASS SWIG module for "GrassMod")

Cheers,
Andrew.

-------------------------> "These thoughts are mine alone!" <---------
Andrew MacIntyre           Operations Branch
tel:   +61 2 6219 5356     Communications Infrastructure Division
fax:   +61 2 6253 3277     Australian Communications & Media Authority
email: andrew.macintyre at acma.gov.au            http://www.acma.gov.au/



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