mbrtoc16state
struct mbrtoc16state *S;
S = (struct mbrtoc16state *)(void *)ps;
__CTASSERT(offsetof(struct mbrtoc16state, mbs) <= sizeof(mbstate_t));
offsetof(struct mbrtoc16state, mbs));
__CTASSERT(alignof(struct mbrtoc16state) <= alignof(mbstate_t));