1#include <uchar.h> 2#include <wchar.h> 3 4size_t mbrtoc32(char32_t *restrict pc32, const char *restrict s, size_t n, mbstate_t *restrict ps) 5{ 6 static unsigned internal_state; 7 if (!ps) ps = (void *)&internal_state; 8 if (!s) return mbrtoc32(0, "", 1, ps); 9 wchar_t wc; 10 size_t ret = mbrtowc(&wc, s, n, ps); 11 if (ret <= 4 && pc32) *pc32 = wc; 12 return ret; 13} 14