lwgeom_from_wkb()

LWGEOM* lwgeom_from_wkb	(	const uint8_t *	wkb,
		const size_t	wkb_size,
		const char	check
	)

WKB inputs must have a declared size, to prevent malformed WKB from reading off the end of the memory segment (this stops a malevolent user from declaring a one-ring polygon to have 10 rings, causing the WKB reader to walk off the end of the memory).

Parameters

check	parser check flags, see LW_PARSER_CHECK_* macros
size	length of WKB byte buffer
wkb	WKB byte buffer

Check is a bitmask of: LW_PARSER_CHECK_MINPOINTS, LW_PARSER_CHECK_ODD, LW_PARSER_CHECK_CLOSURE, LW_PARSER_CHECK_NONE, LW_PARSER_CHECK_ALL

Definition at line 772 of file lwin_wkb.c.

References wkb_parse_state::check, wkb_parse_state::has_m, wkb_parse_state::has_srid, wkb_parse_state::has_z, LW_FALSE, LW_PARSER_CHECK_NONE, lwgeom_from_wkb_state(), wkb_parse_state::lwtype, wkb_parse_state::pos, s, wkb_parse_state::srid, SRID_UNKNOWN, wkb_parse_state::swap_bytes, wkb_parse_state::wkb, and wkb_parse_state::wkb_size.

Referenced by cu_wkb_in(), geography_from_binary(), geography_recv(), lwgeom_from_hexwkb(), LWGEOM_from_WKB(), LWGEOM_in(), LWGEOM_recv(), LWGEOMFromEWKB(), rt_raster_gdal_polygonize(), rt_raster_gdal_rasterize(), and test_wkb_leak().

{
        wkb_parse_state s;

        /* Initialize the state appropriately */
        s.wkb = wkb;
        s.wkb_size = wkb_size;
        s.swap_bytes = LW_FALSE;
        s.check = check;
        s.lwtype = 0;
        s.srid = SRID_UNKNOWN;
        s.has_z = LW_FALSE;
        s.has_m = LW_FALSE;
        s.has_srid = LW_FALSE;
        s.pos = wkb;

        /* Hand the check catch-all values */
        if ( check & LW_PARSER_CHECK_NONE )
                s.check = 0;
        else
                s.check = check;

        return lwgeom_from_wkb_state(&s);
}

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