lwgeom_to_wkb_buffer()

uint8_t * lwgeom_to_wkb_buffer	(	const LWGEOM *	geom,
		uint8_t	variant
	)

Parameters

geom	geometry to convert to WKB
variant	output format to use (WKB_ISO, WKB_SFSQL, WKB_EXTENDED, WKB_NDR, WKB_XDR)

Definition at line 815 of file lwout_wkb.c.

{
        size_t b_size = lwgeom_to_wkb_size(geom, variant);
        /* Hex string takes twice as much space as binary + a null character */
        if (variant & WKB_HEX)
        {
                b_size = 2 * b_size + 1;
        }
 
        uint8_t *buffer = (uint8_t *)lwalloc(b_size);
        ptrdiff_t written_size = lwgeom_to_wkb_write_buf(geom, variant, buffer);
        if (variant & WKB_HEX)
        {
                buffer[written_size] = '\0';
                written_size++;
        }
 
        if (written_size != (ptrdiff_t)b_size)
        {
                char *wkt = lwgeom_to_wkt(geom, WKT_EXTENDED, 15, NULL);
                lwerror("Output WKB is not the same size as the allocated buffer. Variant: %u, Geom: %s", variant, wkt);
                lwfree(wkt);
                lwfree(buffer);
                return NULL;
        }
 
        return buffer;
}

References buffer(), lwalloc(), lwerror(), lwfree(), lwgeom_to_wkb_size(), lwgeom_to_wkb_write_buf(), lwgeom_to_wkt(), variant, WKB_HEX, and WKT_EXTENDED.

Referenced by cu_wkb(), cu_wkb_from_hexwkb(), and lwgeom_to_hexwkb_buffer().

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