2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)expand.c 8.1 (Berkeley) 6/9/93
31 * $FreeBSD: head/usr.bin/expand/expand.c 227238 2011-11-06 18:49:30Z ed $
44 * expand - expand tabs to equivalent spaces
47 static int tabstops[100];
49 static void getstops(char *);
50 static void usage(void);
53 main(int argc, char *argv[])
62 setlocale(LC_CTYPE, "");
64 /* handle obsolete syntax */
65 while (argc > 1 && argv[1][0] == '-' &&
66 isdigit((unsigned char)argv[1][1])) {
67 getstops(&argv[1][1]);
71 while ((c = getopt (argc, argv, "t:")) != -1) {
88 if (freopen(argv[0], "r", stdin) == NULL) {
99 while ((wc = getwchar()) != WEOF) {
106 } while (column & 07);
113 } while (((column - 1) % tabstops[0]) != (tabstops[0] - 1));
116 for (n = 0; n < nstops; n++)
117 if (tabstops[n] > column)
124 while (column < tabstops[n]) {
138 if ((width = wcwidth(wc)) > 0)
164 while (*cp >= '0' && *cp <= '9')
165 i = i * 10 + *cp++ - '0';
167 errx(1, "bad tab stop spec");
168 if (nstops > 0 && i <= tabstops[nstops-1])
169 errx(1, "bad tab stop spec");
170 if (nstops == sizeof(tabstops) / sizeof(*tabstops))
171 errx(1, "too many tab stops");
172 tabstops[nstops++] = i;
175 if (*cp != ',' && !isblank((unsigned char)*cp))
176 errx(1, "bad tab stop spec");
184 fprintf(stderr, "usage: expand [-t tablist] [file ...]\n");