diff options
Diffstat (limited to 'usr.bin/unexpand/unexpand.c')
-rw-r--r-- | usr.bin/unexpand/unexpand.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/usr.bin/unexpand/unexpand.c b/usr.bin/unexpand/unexpand.c new file mode 100644 index 00000000000..681aaf235f1 --- /dev/null +++ b/usr.bin/unexpand/unexpand.c @@ -0,0 +1,141 @@ +/* $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[] = "$NetBSD: unexpand.c,v 1.5 1994/12/24 17:08:05 cgd 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++; + } +} |