codeset_t
codeset_t *cs;
codeset_t *cs;
codeset_t tcs, *cs;
avl_create(&cs_avl, cs_compare, sizeof (codeset_t),
offsetof(codeset_t, cs_node));
const codeset_t *c1 = n1;
const codeset_t *c2 = n2;
codeset_t tmp, *cs;