relate_pattern()

Datum relate_pattern

(

PG_FUNCTION_ARGS

)

Definition at line 2642 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 relate_full().

Referenced by disjoint().

{
        GSERIALIZED *geom1;
        GSERIALIZED *geom2;
        char *patt;
        char result;
        GEOSGeometry *g1, *g2;
        int i;

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


        /* TODO handle empty */

        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();
        }

        patt =  DatumGetCString(DirectFunctionCall1(textout,
                                PointerGetDatum(PG_GETARG_DATUM(2))));

        /*
        ** Need to make sure 't' and 'f' are upper-case before handing to GEOS
        */
        for ( i = 0; i < strlen(patt); i++ )
        {
                if ( patt[i] == 't' ) patt[i] = 'T';
                if ( patt[i] == 'f' ) patt[i] = 'F';
        }

        result = GEOSRelatePattern(g1,g2,patt);
        GEOSGeom_destroy(g1);
        GEOSGeom_destroy(g2);
        pfree(patt);

        if (result == 2)
        {
                HANDLE_GEOS_ERROR("GEOSRelatePattern");
                PG_RETURN_NULL(); /* never get here */
        }

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

        PG_RETURN_BOOL(result);
}

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