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/* $OpenBSD: unexpand.c,v 1.3 1999/02/11 23:08:25 deraadt Exp $ */
/* $NetBSD: unexpand.c,v 1.5 1994/12/24 17:08:05 cgd Exp $ */
/*-
* Copyright (c) 1980, 1993
* 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
static char copyright[] =
"@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)unexpand.c 8.1 (Berkeley) 6/6/93";
#endif
static char rcsid[] = "$OpenBSD: unexpand.c,v 1.3 1999/02/11 23:08:25 deraadt Exp $";
#endif /* not lint */
/*
* unexpand - put tabs into a file replacing blanks
*/
#include <stdio.h>
#include <string.h>
char genbuf[BUFSIZ];
char linebuf[BUFSIZ];
int all;
void tabify __P((char));
int
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);
}
void
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++;
}
}
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