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- /*-
- * Copyright (c) 1980 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1980 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)unexpand.c 5.3 (Berkeley) 4/18/91";
- #endif /* not lint */
-
- /*
- * unexpand - put tabs into a file replacing blanks
- */
- #include <stdio.h>
-
- char genbuf[BUFSIZ];
- char linebuf[BUFSIZ];
- int all;
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- register char *cp;
-
- argc--, argv++;
- if (argc > 0 && argv[0][0] == '-') {
- if (strcmp(argv[0], "-a") != 0) {
- fprintf(stderr, "usage: unexpand [ -a ] file ...\n");
- exit(1);
- }
- all++;
- argc--, argv++;
- }
- do {
- if (argc > 0) {
- if (freopen(argv[0], "r", stdin) == NULL) {
- perror(argv[0]);
- exit(1);
- }
- argc--, argv++;
- }
- while (fgets(genbuf, BUFSIZ, stdin) != NULL) {
- for (cp = linebuf; *cp; cp++)
- continue;
- if (cp > linebuf)
- cp[-1] = 0;
- tabify(all);
- printf("%s", linebuf);
- }
- } while (argc > 0);
- exit(0);
- }
-
- tabify(c)
- char c;
- {
- register char *cp, *dp;
- register int dcol;
- int ocol;
-
- ocol = 0;
- dcol = 0;
- cp = genbuf, dp = linebuf;
- for (;;) {
- switch (*cp) {
-
- case ' ':
- dcol++;
- break;
-
- case '\t':
- dcol += 8;
- dcol &= ~07;
- break;
-
- default:
- while (((ocol + 8) &~ 07) <= dcol) {
- if (ocol + 1 == dcol)
- break;
- *dp++ = '\t';
- ocol += 8;
- ocol &= ~07;
- }
- while (ocol < dcol) {
- *dp++ = ' ';
- ocol++;
- }
- if (*cp == 0 || c == 0) {
- strcpy(dp, cp);
- return;
- }
- *dp++ = *cp;
- ocol++, dcol++;
- }
- cp++;
- }
- }
-