lwcompound_is_closed()

int lwcompound_is_closed

(

const LWCOMPOUND *

curve

)

Definition at line 35 of file lwcompound.c.

References CIRCSTRINGTYPE, LWGEOM::data, getPoint_internal(), LINETYPE, LW_FALSE, LW_TRUE, lwgeom_has_z(), and LWGEOM::type.

Referenced by lwgeom_is_closed(), test_isclosed(), and wkt_parser_curvepolygon_add_ring().

{
        size_t size;
        int npoints=0;

        if ( lwgeom_has_z((LWGEOM*)compound) )
        {
                size = sizeof(POINT3D);
        }
        else
        {
                size = sizeof(POINT2D);
        }

        if ( compound->geoms[compound->ngeoms - 1]->type == CIRCSTRINGTYPE )
        {
                npoints = ((LWCIRCSTRING *)compound->geoms[compound->ngeoms - 1])->points->npoints;
        }
        else if (compound->geoms[compound->ngeoms - 1]->type == LINETYPE)
        {
                npoints = ((LWLINE *)compound->geoms[compound->ngeoms - 1])->points->npoints;
        }

        if ( memcmp(getPoint_internal( (POINTARRAY *)compound->geoms[0]->data, 0),
                    getPoint_internal( (POINTARRAY *)compound->geoms[compound->ngeoms - 1]->data,
                                       npoints - 1),
                    size) )
        {
                return LW_FALSE;
        }

        return LW_TRUE;
}

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