| 1 | #include "str.h" |
| 2 | |
| 3 | int str_diffn(s,t,len) |
| 4 | register char *s; |
| 5 | register char *t; |
| 6 | unsigned int len; |
| 7 | { |
| 8 | register char x; |
| 9 | |
| 10 | for (;;) { |
| 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; |
| 15 | } |
| 16 | return ((int)(unsigned int)(unsigned char) x) |
| 17 | - ((int)(unsigned int)(unsigned char) *t); |
| 18 | } |