ptarray_is_closed()

int ptarray_is_closed ( const POINTARRAY *  pa )

extern

Check for ring closure using whatever dimensionality is declared on the pointarray.

Definition at line 696 of file ptarray.c.

{
        if (!in)
        {
                lwerror("ptarray_is_closed: called with null point array");
                return 0;
        }
        if (in->npoints <= 1 ) return in->npoints; /* single-point are closed, empty not closed */
 
        return 0 == memcmp(getPoint_internal(in, 0), getPoint_internal(in, in->npoints-1), ptarray_point_size(in));
}

References getPoint_internal(), lwerror(), POINTARRAY::npoints, and ptarray_point_size().

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