lwgeom_same()

char lwgeom_same	(	const LWGEOM *	lwgeom1,
		const LWGEOM *	lwgeom2
	)

geom1 same as geom2 iff

• have same type
  • have same # objects
• have same bvol
• each object in geom1 has a corresponding object in geom2 (see above)

  Parameters

  lwgeom1
  lwgeom2

Definition at line 544 of file lwgeom.c.

References LWGEOM::bbox, CIRCSTRINGTYPE, COLLECTIONTYPE, COMPOUNDTYPE, CURVEPOLYTYPE, LWGEOM::flags, FLAGS_GET_ZM, gbox_same(), LINETYPE, LW_FALSE, lwcircstring_same(), lwcollection_same(), LWDEBUG, LWDEBUGF, lwerror(), lwline_same(), lwpoint_same(), lwpoly_same(), lwtriangle_same(), lwtype_name(), MULTICURVETYPE, MULTILINETYPE, MULTIPOINTTYPE, MULTIPOLYGONTYPE, MULTISURFACETYPE, POINTTYPE, POLYGONTYPE, POLYHEDRALSURFACETYPE, TINTYPE, TRIANGLETYPE, LWGEOM::type, and LWCOLLECTION::type.

Referenced by assert_all_results_found(), lwcollection_same(), LWGEOM_same(), test_lwcurve_linearize(), test_lwgeom_force_clockwise(), test_lwgeom_node(), and test_lwgeom_same().

{
        LWDEBUGF(2, "lwgeom_same(%s, %s) called",
                 lwtype_name(lwgeom1->type),
                 lwtype_name(lwgeom2->type));

        if ( lwgeom1->type != lwgeom2->type )
        {
                LWDEBUG(3, " type differ");

                return LW_FALSE;
        }

        if ( FLAGS_GET_ZM(lwgeom1->flags) != FLAGS_GET_ZM(lwgeom2->flags) )
        {
                LWDEBUG(3, " ZM flags differ");

                return LW_FALSE;
        }

        /* Check boxes if both already computed  */
        if ( lwgeom1->bbox && lwgeom2->bbox )
        {
                /*lwnotice("bbox1:%p, bbox2:%p", lwgeom1->bbox, lwgeom2->bbox);*/
                if ( ! gbox_same(lwgeom1->bbox, lwgeom2->bbox) )
                {
                        LWDEBUG(3, " bounding boxes differ");

                        return LW_FALSE;
                }
        }

        /* geoms have same type, invoke type-specific function */
        switch (lwgeom1->type)
        {
        case POINTTYPE:
                return lwpoint_same((LWPOINT *)lwgeom1,
                                    (LWPOINT *)lwgeom2);
        case LINETYPE:
                return lwline_same((LWLINE *)lwgeom1,
                                   (LWLINE *)lwgeom2);
        case POLYGONTYPE:
                return lwpoly_same((LWPOLY *)lwgeom1,
                                   (LWPOLY *)lwgeom2);
        case TRIANGLETYPE:
                return lwtriangle_same((LWTRIANGLE *)lwgeom1,
                                       (LWTRIANGLE *)lwgeom2);
        case CIRCSTRINGTYPE:
                return lwcircstring_same((LWCIRCSTRING *)lwgeom1,
                                         (LWCIRCSTRING *)lwgeom2);
        case MULTIPOINTTYPE:
        case MULTILINETYPE:
        case MULTIPOLYGONTYPE:
        case MULTICURVETYPE:
        case MULTISURFACETYPE:
        case COMPOUNDTYPE:
        case CURVEPOLYTYPE:
        case POLYHEDRALSURFACETYPE:
        case TINTYPE:
        case COLLECTIONTYPE:
                return lwcollection_same((LWCOLLECTION *)lwgeom1,
                                         (LWCOLLECTION *)lwgeom2);
        default:
                lwerror("lwgeom_same: unsupported geometry type: %s",
                        lwtype_name(lwgeom1->type));
                return LW_FALSE;
        }

}

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