147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
/*-
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifndef lint
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static const char sccsid[] = "@(#)unexpand.c 8.1 (Berkeley) 6/6/93";
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#endif
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/*
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* unexpand - put tabs into a file replacing blanks
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*/
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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char genbuf[BUFSIZ];
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char linebuf[BUFSIZ];
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int all;
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static void usage __P((void));
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void tabify __P((char));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register char *cp;
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argc--, argv++;
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if (argc > 0 && argv[0][0] == '-') {
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if (strcmp(argv[0], "-a") != 0)
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usage();
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all++;
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argc--, argv++;
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}
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do {
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if (argc > 0) {
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if (freopen(argv[0], "r", stdin) == NULL)
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err(1, "%s", argv[0]);
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argc--, argv++;
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}
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while (fgets(genbuf, BUFSIZ, stdin) != NULL) {
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for (cp = linebuf; *cp; cp++)
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continue;
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if (cp > linebuf)
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cp[-1] = 0;
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tabify(all);
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printf("%s", linebuf);
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}
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} while (argc > 0);
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exit(0);
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}
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static void
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usage()
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{
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fprintf(stderr, "usage: unexpand [-a] file ...\n");
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exit(1);
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}
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void
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tabify(c)
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char c;
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{
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register char *cp, *dp;
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register int dcol;
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int ocol;
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ocol = 0;
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dcol = 0;
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cp = genbuf, dp = linebuf;
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for (;;) {
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switch (*cp) {
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case ' ':
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dcol++;
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break;
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case '\t':
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dcol += 8;
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dcol &= ~07;
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break;
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default:
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while (((ocol + 8) &~ 07) <= dcol) {
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if (ocol + 1 == dcol)
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break;
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*dp++ = '\t';
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ocol += 8;
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ocol &= ~07;
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}
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while (ocol < dcol) {
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*dp++ = ' ';
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ocol++;
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}
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if (*cp == 0 || c == 0) {
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strcpy(dp, cp);
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return;
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}
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*dp++ = *cp;
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ocol++, dcol++;
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}
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cp++;
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}
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}
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