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1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.redist.c% | |
6 | */ | |
7 | ||
8 | #ifndef lint | |
9 | static char sccsid[] = "@(#)regular.c 5.1 (Berkeley) %G%"; | |
10 | #endif /* not lint */ | |
11 | ||
12 | #include <sys/param.h> | |
13 | #include <sys/mman.h> | |
14 | #include <sys/stat.h> | |
15 | #include <errno.h> | |
16 | #include <stdlib.h> | |
17 | #include <stdio.h> | |
18 | #include <string.h> | |
19 | #include "extern.h" | |
20 | ||
21 | void | |
22 | c_regular(fd1, file1, skip1, len1, fd2, file2, skip2, len2) | |
23 | int fd1, fd2; | |
24 | char *file1, *file2; | |
25 | off_t skip1, len1, skip2, len2; | |
26 | { | |
27 | register u_char ch, *p1, *p2; | |
28 | register off_t byte, length, line; | |
29 | int dfound; | |
30 | ||
31 | if (sflag && len1 != len2) | |
32 | exit(1); | |
33 | ||
34 | if (skip1 >= len1) | |
35 | eofmsg(file1); | |
36 | len1 -= skip1; | |
37 | if (skip2 >= len2) | |
38 | eofmsg(file2); | |
39 | len2 -= skip2; | |
40 | ||
41 | length = MIN(len1, len2); | |
42 | if ((p1 = (u_char *)mmap(NULL, | |
43 | length, PROT_READ, MAP_FILE, fd1, skip1)) == (u_char *)-1) | |
44 | err("%s: %s", file1, strerror(errno)); | |
45 | if ((p2 = (u_char *)mmap(NULL, | |
46 | length, PROT_READ, MAP_FILE, fd2, skip2)) == (u_char *)-1) | |
47 | err("%s: %s", file2, strerror(errno)); | |
48 | ||
49 | dfound = 0; | |
50 | for (byte = line = 1; length--; ++p1, ++p2, ++byte) { | |
51 | if ((ch = *p1) != *p2) | |
52 | if (lflag) { | |
53 | dfound = 1; | |
54 | (void)printf("%6ld %3o %3o\n", byte, ch, *p2); | |
55 | } else | |
56 | diffmsg(file1, file2, byte, line); | |
57 | /* NOTREACHED */ | |
58 | if (ch == '\n') | |
59 | ++line; | |
60 | } | |
61 | ||
62 | if (len1 != len2) | |
63 | eofmsg (len1 > len2 ? file2 : file1); | |
64 | if (dfound) | |
65 | exit(1); | |
66 | } |