| | 1 | /* |
| | 2 | * $Source$ |
| | 3 | * $Header$ |
| | 4 | */ |
| | 5 | /* (c) Copyright 1988 by the Massachusetts Institute of Technology. */ |
| | 6 | /* For copying and distribution information, please see the file */ |
| | 7 | /* <mit-copyright.h>. */ |
| | 8 | |
| | 9 | #ifndef lint |
| | 10 | static char *rcsid_checksum_c = "$Header$"; |
| | 11 | #endif lint |
| | 12 | |
| | 13 | #include <mit-copyright.h> |
| | 14 | #include <stdio.h> |
| | 15 | #include <sys/types.h> |
| | 16 | #include <sys/file.h> |
| | 17 | |
| | 18 | /* |
| | 19 | * checksum_fd(fd) |
| | 20 | * returns 24-bit checksum of bytes in file |
| | 21 | */ |
| | 22 | |
| | 23 | int |
| | 24 | checksum_file(path) |
| | 25 | char *path; |
| | 26 | { |
| | 27 | register int sum; |
| | 28 | register int ch; |
| | 29 | register FILE *f; |
| | 30 | |
| | 31 | sum = 0; |
| | 32 | f = fopen(path, "r"); |
| | 33 | while ((ch = getc(f)) != EOF) { |
| | 34 | sum = (sum + ch) & ((1<<24)-1); |
| | 35 | } |
| | 36 | fclose(f); |
| | 37 | return(sum); |
| | 38 | } |
andersk / moira.git / blame_incremental