11 if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
12 if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
13 if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
14 if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
16 return ((int)(unsigned int)(unsigned char) x)
17 - ((int)(unsigned int)(unsigned char) *t);