source:
trunk/minix/lib/other/ffs.c@
15
| Last change on this file since 15 was 9, checked in by , 14 years ago | |
|---|---|
| File size: 243 bytes | |
| Line | |
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| 1 | #include <lib.h> |
| 2 | /* ffs(3) |
| 3 | * |
| 4 | * Author: Terrence W. Holm Sep. 1988 |
| 5 | */ |
| 6 | _PROTOTYPE( int ffs, (int word)); |
| 7 | |
| 8 | int ffs(word) |
| 9 | int word; |
| 10 | { |
| 11 | int i; |
| 12 | |
| 13 | if (word == 0) return(0); |
| 14 | |
| 15 | for (i = 1;; ++i, word >>= 1) |
| 16 | if (word & 1) return(i); |
| 17 | } |
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