3 /* str_diff returns negative, 0, or positive, depending on whether the
4 * string a[0], a[1], ..., a[n]=='\0' is lexicographically smaller than,
5 * equal to, or greater than the string b[0], b[1], ..., b[m-1]=='\0'.
6 * When the strings are different, str_diff does not read bytes past the
8 int str_diffn(const char* a, const char* b, unsigned int limit) {
9 register const char* s=a;
10 register const char* t=b;
11 register const char* u=t+limit;
15 if (t>=u) break; if ((j=(*s-*t))) break; if (!*t) break; ++s; ++t;
16 if (t>=u) break; if ((j=(*s-*t))) break; if (!*t) break; ++s; ++t;
17 if (t>=u) break; if ((j=(*s-*t))) break; if (!*t) break; ++s; ++t;
18 if (t>=u) break; if ((j=(*s-*t))) break; if (!*t) break; ++s; ++t;