1 #include <uchar.h>
2 #include <wchar.h>
3 
mbrtoc32(char32_t * restrict pc32,const char * restrict s,size_t n,mbstate_t * restrict ps)4 size_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