lwgeom_to_twkb_with_idlist()

lwvarlena_t * lwgeom_to_twkb_with_idlist	(	const LWGEOM *	geom,
		int64_t *	idlist,
		uint8_t	variant,
		int8_t	precision_xy,
		int8_t	precision_z,
		int8_t	precision_m
	)

Convert LWGEOM to a char* in TWKB format.

Caller is responsible for freeing the returned array.

Definition at line 589 of file lwout_twkb.c.

{
        LWDEBUGF(2, "Entered %s", __func__);
        LWDEBUGF(2, "variant value %x", variant);
 
        TWKB_GLOBALS tg;
        TWKB_STATE ts;
        bytebuffer_t geom_bytebuffer;
 
        memset(&ts, 0, sizeof(TWKB_STATE));
        memset(&tg, 0, sizeof(TWKB_GLOBALS));
 
        tg.variant = variant;
        tg.prec_xy = precision_xy;
        tg.prec_z = precision_z;
        tg.prec_m = precision_m;
 
        if ( idlist && ! lwgeom_is_collection(geom) )
        {
                lwerror("Only collections can support ID lists");
                return NULL;
        }
 
        if ( ! geom )
        {
                LWDEBUG(4,"Cannot convert NULL into TWKB.");
                lwerror("Cannot convert NULL into TWKB");
                return NULL;
        }
 
        ts.idlist = idlist;
        ts.header_buf = NULL;
        ts.geom_buf = &geom_bytebuffer;
        bytebuffer_init_with_size(ts.geom_buf, 512);
        lwgeom_write_to_buffer(geom, &tg, &ts);
 
        lwvarlena_t *v = bytebuffer_get_buffer_varlena(ts.geom_buf);
        bytebuffer_destroy_buffer(ts.geom_buf);
        return v;
}

References bytebuffer_destroy_buffer(), bytebuffer_get_buffer_varlena(), bytebuffer_init_with_size(), TWKB_STATE::geom_buf, TWKB_STATE::header_buf, TWKB_STATE::idlist, LWDEBUG, LWDEBUGF, lwerror(), lwgeom_is_collection(), lwgeom_write_to_buffer(), TWKB_GLOBALS::prec_m, TWKB_GLOBALS::prec_xy, TWKB_GLOBALS::prec_z, variant, and TWKB_GLOBALS::variant.

Referenced by cu_twkb_idlist(), lwgeom_to_twkb(), and TWKBFromLWGEOMArray().

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