Commit | Line | Data |
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94bed826 | 1 | /*- |
297a0a40 KB |
2 | * Copyright (c) 1980 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
94bed826 | 5 | * %sccs.include.redist.c% |
22e155fc DF |
6 | */ |
7 | ||
8 | #ifndef lint | |
9 | char copyright[] = | |
297a0a40 | 10 | "@(#) Copyright (c) 1980 The Regents of the University of California.\n\ |
22e155fc | 11 | All rights reserved.\n"; |
297a0a40 | 12 | #endif /* not lint */ |
22e155fc DF |
13 | |
14 | #ifndef lint | |
94bed826 | 15 | static char sccsid[] = "@(#)unexpand.c 5.3 (Berkeley) %G%"; |
297a0a40 | 16 | #endif /* not lint */ |
22e155fc | 17 | |
e86e5c73 BJ |
18 | /* |
19 | * unexpand - put tabs into a file replacing blanks | |
20 | */ | |
21 | #include <stdio.h> | |
22 | ||
23 | char genbuf[BUFSIZ]; | |
24 | char linebuf[BUFSIZ]; | |
25 | int all; | |
26 | ||
27 | main(argc, argv) | |
28 | int argc; | |
29 | char *argv[]; | |
30 | { | |
31 | register char *cp; | |
32 | ||
33 | argc--, argv++; | |
338c4a5d | 34 | if (argc > 0 && argv[0][0] == '-') { |
e86e5c73 BJ |
35 | if (strcmp(argv[0], "-a") != 0) { |
36 | fprintf(stderr, "usage: unexpand [ -a ] file ...\n"); | |
37 | exit(1); | |
38 | } | |
39 | all++; | |
40 | argc--, argv++; | |
41 | } | |
42 | do { | |
43 | if (argc > 0) { | |
44 | if (freopen(argv[0], "r", stdin) == NULL) { | |
45 | perror(argv[0]); | |
46 | exit(1); | |
47 | } | |
48 | argc--, argv++; | |
49 | } | |
50 | while (fgets(genbuf, BUFSIZ, stdin) != NULL) { | |
51 | for (cp = linebuf; *cp; cp++) | |
52 | continue; | |
53 | if (cp > linebuf) | |
54 | cp[-1] = 0; | |
55 | tabify(all); | |
56 | printf("%s", linebuf); | |
57 | } | |
58 | } while (argc > 0); | |
59 | exit(0); | |
60 | } | |
61 | ||
62 | tabify(c) | |
63 | char c; | |
64 | { | |
65 | register char *cp, *dp; | |
66 | register int dcol; | |
67 | int ocol; | |
68 | ||
69 | ocol = 0; | |
70 | dcol = 0; | |
71 | cp = genbuf, dp = linebuf; | |
72 | for (;;) { | |
73 | switch (*cp) { | |
74 | ||
75 | case ' ': | |
76 | dcol++; | |
77 | break; | |
78 | ||
79 | case '\t': | |
338c4a5d SL |
80 | dcol += 8; |
81 | dcol &= ~07; | |
e86e5c73 BJ |
82 | break; |
83 | ||
84 | default: | |
85 | while (((ocol + 8) &~ 07) <= dcol) { | |
86 | if (ocol + 1 == dcol) | |
87 | break; | |
88 | *dp++ = '\t'; | |
338c4a5d SL |
89 | ocol += 8; |
90 | ocol &= ~07; | |
e86e5c73 BJ |
91 | } |
92 | while (ocol < dcol) { | |
93 | *dp++ = ' '; | |
94 | ocol++; | |
95 | } | |
96 | if (*cp == 0 || c == 0) { | |
97 | strcpy(dp, cp); | |
98 | return; | |
99 | } | |
100 | *dp++ = *cp; | |
101 | ocol++, dcol++; | |
102 | } | |
103 | cp++; | |
104 | } | |
105 | } |