GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/expand/expand.c Lines: 0 63 0.0 %
Date: 2017-11-07 Branches: 0 78 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: expand.c,v 1.14 2015/10/09 01:37:07 deraadt Exp $	*/
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/*	$NetBSD: expand.c,v 1.5 1995/09/02 06:19:46 jtc Exp $	*/
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/*
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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. 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 <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <err.h>
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/*
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 * expand - expand tabs to equivalent spaces
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 */
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int	nstops;
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int	tabstops[100];
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static void getstops(char *);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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	int c, column;
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	int n;
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	if (pledge("stdio rpath flock cpath wpath", NULL) == -1)
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		err(1, "pledge");
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	/* handle obsolete syntax */
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	while (argc > 1 && argv[1][0] == '-' &&
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	    isdigit((unsigned char)argv[1][1])) {
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		getstops(&argv[1][1]);
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		argc--; argv++;
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	}
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	while ((c = getopt (argc, argv, "t:")) != -1) {
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		switch (c) {
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		case 't':
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			getstops(optarg);
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			break;
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		case '?':
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		default:
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			usage();
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			/* NOTREACHED */
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		}
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	}
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	argc -= optind;
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	argv += optind;
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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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		column = 0;
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		while ((c = getchar()) != EOF) {
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			switch (c) {
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			case '\t':
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				if (nstops == 0) {
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					do {
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						putchar(' ');
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						column++;
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					} while (column & 07);
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					continue;
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				}
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				if (nstops == 1) {
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					do {
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						putchar(' ');
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						column++;
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					} while (((column - 1) %
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					    tabstops[0]) != (tabstops[0] - 1));
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					continue;
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				}
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				for (n = 0; n < nstops; n++)
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					if (tabstops[n] > column)
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						break;
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				if (n == nstops) {
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					putchar(' ');
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					column++;
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					continue;
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				}
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				while (column < tabstops[n]) {
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					putchar(' ');
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					column++;
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				}
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				continue;
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			case '\b':
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				if (column)
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					column--;
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				putchar('\b');
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				continue;
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			default:
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				putchar(c);
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				column++;
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				continue;
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			case '\n':
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				putchar(c);
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				column = 0;
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				continue;
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			}
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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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getstops(char *cp)
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{
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	int i;
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	nstops = 0;
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	for (;;) {
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		i = 0;
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		while (*cp >= '0' && *cp <= '9')
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			i = i * 10 + *cp++ - '0';
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		if (i <= 0 || i > 256) {
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bad:
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			errx(1, "Bad tab stop spec");
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		}
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		if (nstops > 0 && i <= tabstops[nstops-1])
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			goto bad;
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		if (nstops >= sizeof(tabstops) / sizeof(tabstops[0]))
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			errx(1, "Too many tab stops");
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		tabstops[nstops++] = i;
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		if (*cp == 0)
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			break;
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		if (*cp != ',' && *cp != ' ')
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			goto bad;
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		cp++;
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	}
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}
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static void
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usage(void)
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{
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	extern char *__progname;
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	fprintf (stderr, "usage: %s [-t tablist] [file ...]\n", __progname);
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	exit(1);
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}