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1.1 deraadt 1: /* $NetBSD: unexpand.c,v 1.5 1994/12/24 17:08:05 cgd Exp $ */
2:
3: /*-
4: * Copyright (c) 1980, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: static char copyright[] =
38: "@(#) Copyright (c) 1980, 1993\n\
39: The Regents of the University of California. All rights reserved.\n";
40: #endif /* not lint */
41:
42: #ifndef lint
43: #if 0
44: static char sccsid[] = "@(#)unexpand.c 8.1 (Berkeley) 6/6/93";
45: #endif
46: static char rcsid[] = "$NetBSD: unexpand.c,v 1.5 1994/12/24 17:08:05 cgd Exp $";
47: #endif /* not lint */
48:
49: /*
50: * unexpand - put tabs into a file replacing blanks
51: */
52: #include <stdio.h>
53: #include <string.h>
54:
55: char genbuf[BUFSIZ];
56: char linebuf[BUFSIZ];
57: int all;
58:
59: void tabify __P((char));
60:
61: int
62: main(argc, argv)
63: int argc;
64: char *argv[];
65: {
66: register char *cp;
67:
68: argc--, argv++;
69: if (argc > 0 && argv[0][0] == '-') {
70: if (strcmp(argv[0], "-a") != 0) {
71: fprintf(stderr, "usage: unexpand [ -a ] file ...\n");
72: exit(1);
73: }
74: all++;
75: argc--, argv++;
76: }
77: do {
78: if (argc > 0) {
79: if (freopen(argv[0], "r", stdin) == NULL) {
80: perror(argv[0]);
81: exit(1);
82: }
83: argc--, argv++;
84: }
85: while (fgets(genbuf, BUFSIZ, stdin) != NULL) {
86: for (cp = linebuf; *cp; cp++)
87: continue;
88: if (cp > linebuf)
89: cp[-1] = 0;
90: tabify(all);
91: printf("%s", linebuf);
92: }
93: } while (argc > 0);
94: exit(0);
95: }
96:
97: void
98: tabify(c)
99: char c;
100: {
101: register char *cp, *dp;
102: register int dcol;
103: int ocol;
104:
105: ocol = 0;
106: dcol = 0;
107: cp = genbuf, dp = linebuf;
108: for (;;) {
109: switch (*cp) {
110:
111: case ' ':
112: dcol++;
113: break;
114:
115: case '\t':
116: dcol += 8;
117: dcol &= ~07;
118: break;
119:
120: default:
121: while (((ocol + 8) &~ 07) <= dcol) {
122: if (ocol + 1 == dcol)
123: break;
124: *dp++ = '\t';
125: ocol += 8;
126: ocol &= ~07;
127: }
128: while (ocol < dcol) {
129: *dp++ = ' ';
130: ocol++;
131: }
132: if (*cp == 0 || c == 0) {
133: strcpy(dp, cp);
134: return;
135: }
136: *dp++ = *cp;
137: ocol++, dcol++;
138: }
139: cp++;
140: }
141: }