LWGEOM_numpoints_linestring()

Datum LWGEOM_numpoints_linestring

(

PG_FUNCTION_ARGS

)

Definition at line 220 of file lwgeom_ogc.c.

{
        GSERIALIZED *geom = PG_GETARG_GSERIALIZED_P(0);
        LWGEOM *lwgeom = lwgeom_from_gserialized(geom);
        int count = -1;
        int type = lwgeom->type;
 
        if ( type == LINETYPE || type == CIRCSTRINGTYPE || type == COMPOUNDTYPE )
                count = lwgeom_count_vertices(lwgeom);
 
        lwgeom_free(lwgeom);
        PG_FREE_IF_COPY(geom, 0);
 
        /* OGC says this functions is only valid on LINESTRING */
        if ( count < 0 )
                PG_RETURN_NULL();
 
        PG_RETURN_INT32(count);
}

References CIRCSTRINGTYPE, COMPOUNDTYPE, LINETYPE, lwgeom_count_vertices(), lwgeom_free(), lwgeom_from_gserialized(), and LWGEOM::type.

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