LWGEOM_makeline()

Datum LWGEOM_makeline

(

PG_FUNCTION_ARGS

)

Definition at line 1487 of file lwgeom_functions_basic.c.

{
        GSERIALIZED *pglwg1, *pglwg2;
        GSERIALIZED *result = NULL;
        LWGEOM *lwgeoms[2];
        LWLINE *outline;
 
        POSTGIS_DEBUG(2, "LWGEOM_makeline called.");
 
        /* Get input datum */
        pglwg1 = PG_GETARG_GSERIALIZED_P(0);
        pglwg2 = PG_GETARG_GSERIALIZED_P(1);
 
        if ((gserialized_get_type(pglwg1) != POINTTYPE && gserialized_get_type(pglwg1) != LINETYPE) ||
            (gserialized_get_type(pglwg2) != POINTTYPE && gserialized_get_type(pglwg2) != LINETYPE))
        {
                elog(ERROR, "Input geometries must be points or lines");
                PG_RETURN_NULL();
        }
 
        gserialized_error_if_srid_mismatch(pglwg1, pglwg2, __func__);
 
        lwgeoms[0] = lwgeom_from_gserialized(pglwg1);
        lwgeoms[1] = lwgeom_from_gserialized(pglwg2);
 
        outline = lwline_from_lwgeom_array(lwgeoms[0]->srid, 2, lwgeoms);
 
        result = geometry_serialize((LWGEOM *)outline);
 
        PG_FREE_IF_COPY(pglwg1, 0);
        PG_FREE_IF_COPY(pglwg2, 1);
        lwgeom_free(lwgeoms[0]);
        lwgeom_free(lwgeoms[1]);
 
        PG_RETURN_POINTER(result);
}

References geometry_serialize(), gserialized_error_if_srid_mismatch(), gserialized_get_type(), LINETYPE, lwgeom_free(), lwgeom_from_gserialized(), lwline_from_lwgeom_array(), and POINTTYPE.

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