2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 static const char copyright[] =
34 "@(#) Copyright (c) 1980, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)expand.c 8.1 (Berkeley) 6/9/93";
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
56 * expand - expand tabs to equivalent spaces
59 static int tabstops[100];
61 static void getstops(char *);
62 static void usage(void) __dead2;
65 main(int argc, char *argv[])
74 setlocale(LC_CTYPE, "");
76 /* handle obsolete syntax */
77 while (argc > 1 && argv[1][0] == '-' &&
78 isdigit((unsigned char)argv[1][1])) {
79 getstops(&argv[1][1]);
83 while ((c = getopt (argc, argv, "t:")) != -1) {
100 if (freopen(argv[0], "r", stdin) == NULL) {
111 while ((wc = getwchar()) != WEOF) {
118 } while (column & 07);
125 } while (((column - 1) % tabstops[0]) != (tabstops[0] - 1));
128 for (n = 0; n < nstops; n++)
129 if (tabstops[n] > column)
136 while (column < tabstops[n]) {
150 if ((width = wcwidth(wc)) > 0)
176 while (*cp >= '0' && *cp <= '9')
177 i = i * 10 + *cp++ - '0';
179 errx(1, "bad tab stop spec");
180 if (nstops > 0 && i <= tabstops[nstops-1])
181 errx(1, "bad tab stop spec");
182 if (nstops == sizeof(tabstops) / sizeof(*tabstops))
183 errx(1, "too many tab stops");
184 tabstops[nstops++] = i;
187 if (*cp != ',' && !isblank((unsigned char)*cp))
188 errx(1, "bad tab stop spec");
196 (void)fprintf (stderr, "usage: expand [-t tablist] [file ...]\n");