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 * 4. 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
31 static const char copyright[] =
32 "@(#) Copyright (c) 1980, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)expand.c 8.1 (Berkeley) 6/9/93";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
54 * expand - expand tabs to equivalent spaces
59 static void getstops(char *);
60 static void usage(void);
63 main(int argc, char *argv[])
72 setlocale(LC_CTYPE, "");
74 /* handle obsolete syntax */
75 while (argc > 1 && argv[1][0] == '-' &&
76 isdigit((unsigned char)argv[1][1])) {
77 getstops(&argv[1][1]);
81 while ((c = getopt (argc, argv, "t:")) != -1) {
98 if (freopen(argv[0], "r", stdin) == NULL) {
109 while ((wc = getwchar()) != WEOF) {
116 } while (column & 07);
123 } while (((column - 1) % tabstops[0]) != (tabstops[0] - 1));
126 for (n = 0; n < nstops; n++)
127 if (tabstops[n] > column)
134 while (column < tabstops[n]) {
148 if ((width = wcwidth(wc)) > 0)
174 while (*cp >= '0' && *cp <= '9')
175 i = i * 10 + *cp++ - '0';
177 errx(1, "bad tab stop spec");
178 if (nstops > 0 && i <= tabstops[nstops-1])
179 errx(1, "bad tab stop spec");
180 if (nstops == sizeof(tabstops) / sizeof(*tabstops))
181 errx(1, "too many tab stops");
182 tabstops[nstops++] = i;
185 if (*cp != ',' && !isblank((unsigned char)*cp))
186 errx(1, "bad tab stop spec");
194 (void)fprintf (stderr, "usage: expand [-t tablist] [file ...]\n");