8 size_t mbsrtowcs(wchar_t *restrict ws, const char **restrict src, size_t wn, mbstate_t *restrict st)
10 const unsigned char *s = (const void *)*src;
14 if (st && (c = *(unsigned *)st)) {
24 if (!ws) return strlen((const char *)s);
27 *src = (const void *)s;
41 if (*s-1u < 0x7f && (uintptr_t)s%4 == 0) {
42 while (!(( *(uint32_t*)s | *(uint32_t*)s-0x01010101) & 0x80808080)) {
52 if (*s-SA > SB-SA) break;
55 if (OOB(c,*s)) { s--; break; }
58 if (*s-0x80u >= 0x40) { s-=2; break; }
61 if (*s-0x80u >= 0x40) { s-=3; break; }
69 *src = (const void *)s;
72 if (*s-1u < 0x7f && (uintptr_t)s%4 == 0) {
73 while (wn>=5 && !(( *(uint32_t*)s | *(uint32_t*)s-0x01010101) & 0x80808080)) {
86 if (*s-SA > SB-SA) break;
89 if (OOB(c,*s)) { s--; break; }
90 c = (c<<6) | *s++-0x80;
92 if (*s-0x80u >= 0x40) { s-=2; break; }
93 c = (c<<6) | *s++-0x80;
95 if (*s-0x80u >= 0x40) { s-=3; break; }
96 c = (c<<6) | *s++-0x80;
112 if (ws) *src = (const void *)s;