1. The methods GEOSCoordSeq_getSize and GEOSCoordSeq_getDimensions return their results by updating a pointer to a size_t parameter. Thus like this:GEOSCoordSeq_getSize(const GEOSCoordSeq s, size_t *size);In contrast, these methods just return the result: GEOSGeom_getDimensions returns value, not as a parameter GEOSGeom_getNumcoordinates GEOSGeom_getNumInteriorRings GEOSGeom_getNumGeometries Seems like an unneeded inconsistency.
A follow up to this. The methods like GEOSGeom_genNumcoordinates are defined like this:
/* Return -1 on exception */ extern size_t GEOS_DLL GEOSGetNumCoordinates(const GEOSGeom g1); However, size_t is defined as: typedef unsigned int size_tSo returning -1 isn't such a good idea is it? You'd have to type cast to an int first to check the result.
Charlie
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