LWGEOM_to_BOX()

Datum LWGEOM_to_BOX

(

PG_FUNCTION_ARGS

)

Definition at line 1691 of file lwgeom_functions_basic.c.

{
        GSERIALIZED *pg_lwgeom = PG_GETARG_GSERIALIZED_P(0);
        LWGEOM *lwgeom = lwgeom_from_gserialized(pg_lwgeom);
        GBOX gbox;
        int result;
        BOX *out = NULL;
 
        /* Zero out flags */
        gbox_init(&gbox);
 
        /* Calculate the GBOX of the geometry */
        result = lwgeom_calculate_gbox(lwgeom, &gbox);
 
        /* Clean up memory */
        lwfree(lwgeom);
        PG_FREE_IF_COPY(pg_lwgeom, 0);
 
        /* Null on failure */
        if (!result)
                PG_RETURN_NULL();
 
        out = lwalloc(sizeof(BOX));
        out->low.x = gbox.xmin;
        out->low.y = gbox.ymin;
        out->high.x = gbox.xmax;
        out->high.y = gbox.ymax;
        PG_RETURN_POINTER(out);
}

References gbox_init(), lwalloc(), lwfree(), lwgeom_calculate_gbox(), lwgeom_from_gserialized(), result, GBOX::xmax, GBOX::xmin, GBOX::ymax, and GBOX::ymin.

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