LWGEOM_makeline()

Datum LWGEOM_makeline

(

PG_FUNCTION_ARGS

)

Definition at line 1490 of file lwgeom_functions_basic.c.

References error_if_srid_mismatch(), geometry_serialize(), gserialized_get_srid(), gserialized_get_type(), LINETYPE, lwgeom_free(), lwgeom_from_gserialized(), LWGEOM_makepoly(), lwline_from_lwgeom_array(), genraster::outline, PG_FUNCTION_INFO_V1(), and POINTTYPE.

Referenced by LWGEOM_makeline_garray().

{
        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();
        }

        error_if_srid_mismatch(gserialized_get_srid(pglwg1), gserialized_get_srid(pglwg2));

        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);
}

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