relate_full()

Datum relate_full

(

PG_FUNCTION_ARGS

)

Definition at line 2708 of file postgis/lwgeom_geos.c.

References error_if_srid_mismatch(), errorIfGeometryCollection(), gserialized_get_srid(), HANDLE_GEOS_ERROR, lwgeom_geos_error(), PG_FUNCTION_INFO_V1(), POSTGIS2GEOS(), and ST_Equals().

Referenced by relate_pattern().

{
        GSERIALIZED *geom1;
        GSERIALIZED *geom2;
        GEOSGeometry *g1, *g2;
        char *relate_str;
        text *result;
        int bnr = GEOSRELATE_BNR_OGC;

        POSTGIS_DEBUG(2, "in relate_full()");

        /* TODO handle empty */

        geom1 = PG_GETARG_GSERIALIZED_P(0);
        geom2 = PG_GETARG_GSERIALIZED_P(1);

        if ( PG_NARGS() > 2 )
        {
                bnr = PG_GETARG_INT32(2);
        }

        errorIfGeometryCollection(geom1,geom2);
        error_if_srid_mismatch(gserialized_get_srid(geom1), gserialized_get_srid(geom2));

        initGEOS(lwpgnotice, lwgeom_geos_error);

        g1 = (GEOSGeometry *)POSTGIS2GEOS(geom1 );
        if ( 0 == g1 )   /* exception thrown at construction */
        {
                HANDLE_GEOS_ERROR("First argument geometry could not be converted to GEOS");
                PG_RETURN_NULL();
        }
        g2 = (GEOSGeometry *)POSTGIS2GEOS(geom2 );
        if ( 0 == g2 )   /* exception thrown at construction */
        {
                HANDLE_GEOS_ERROR("Second argument geometry could not be converted to GEOS");
                GEOSGeom_destroy(g1);
                PG_RETURN_NULL();
        }

        POSTGIS_DEBUG(3, "constructed geometries ");

        if ((g1==NULL) || (g2 == NULL))
                elog(NOTICE,"g1 or g2 are null");

        POSTGIS_DEBUGF(3, "%s", GEOSGeomToWKT(g1));
        POSTGIS_DEBUGF(3, "%s", GEOSGeomToWKT(g2));

        relate_str = GEOSRelateBoundaryNodeRule(g1, g2, bnr);

        GEOSGeom_destroy(g1);
        GEOSGeom_destroy(g2);

        if (relate_str == NULL)
        {
                HANDLE_GEOS_ERROR("GEOSRelate");
                PG_RETURN_NULL(); /* never get here */
        }

        result = cstring2text(relate_str);
        GEOSFree(relate_str);

        PG_FREE_IF_COPY(geom1, 0);
        PG_FREE_IF_COPY(geom2, 1);

        PG_RETURN_TEXT_P(result);
}

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