LWGEOM_line_from_mpoint()

Datum LWGEOM_line_from_mpoint

(

PG_FUNCTION_ARGS

)

Definition at line 1345 of file lwgeom_functions_basic.c.

References geometry_serialize(), gserialized_get_type(), lwgeom_as_lwmpoint(), lwgeom_from_gserialized(), LWGEOM_makeline_garray(), lwline_as_lwgeom(), lwline_free(), lwline_from_lwmpoint(), MULTIPOINTTYPE, PG_FUNCTION_INFO_V1(), and LWMPOINT::srid.

Referenced by LWGEOM_collect_garray().

{
        GSERIALIZED *ingeom, *result;
        LWLINE *lwline;
        LWMPOINT *mpoint;

        POSTGIS_DEBUG(2, "LWGEOM_line_from_mpoint called");

        /* Get input GSERIALIZED and deserialize it */
        ingeom = PG_GETARG_GSERIALIZED_P(0);

        if ( gserialized_get_type(ingeom) != MULTIPOINTTYPE )
        {
                elog(ERROR, "makeline: input must be a multipoint");
                PG_RETURN_NULL(); /* input is not a multipoint */
        }

        mpoint = lwgeom_as_lwmpoint(lwgeom_from_gserialized(ingeom));
        lwline = lwline_from_lwmpoint(mpoint->srid, mpoint);
        if ( ! lwline )
        {
                PG_FREE_IF_COPY(ingeom, 0);
                elog(ERROR, "makeline: lwline_from_lwmpoint returned NULL");
                PG_RETURN_NULL();
        }

        result = geometry_serialize(lwline_as_lwgeom(lwline));

        PG_FREE_IF_COPY(ingeom, 0);
        lwline_free(lwline);

        PG_RETURN_POINTER(result);
}

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