[geos-devel] Question about GEOSPolygonize_full_r

Sean Gillies sean.gillies at gmail.com
Thu Jul 18 20:47:35 PDT 2013

Hi all,

Shapely users have been asking me about access to GEOSPolygonize_full_r and
I'm looking into it today. One thing I don't understand about the function
(not being much of a C++ programmer anymore) is why the cuts, dangles, and
invalid rings are only retrieved if the pointers passed in for them are not


Wouldn't it be better if the pointers *were* NULL since they are supposed
to point to memory allocated by this function instead of bringing in data
from the caller?

Sean Gillies
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