GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/unexpand/unexpand.c Lines: 0 47 0.0 %
Date: 2017-11-13 Branches: 0 37 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: unexpand.c,v 1.13 2016/10/11 16:22:15 millert Exp $	*/
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/*	$NetBSD: unexpand.c,v 1.5 1994/12/24 17:08:05 cgd 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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/*
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 * unexpand - put tabs into a file replacing blanks
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 */
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#include <stdbool.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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#include <unistd.h>
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char	genbuf[BUFSIZ];
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char	linebuf[BUFSIZ];
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void tabify(bool);
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int
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main(int argc, char *argv[])
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{
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	bool all = false;
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	char *cp;
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	if (pledge("stdio rpath flock cpath wpath", NULL) == -1) {
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		perror("pledge");
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		exit(1);
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	}
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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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			fprintf(stderr, "usage: unexpand [-a] [file ...]\n");
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			exit(1);
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		}
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		all = true;
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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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				perror(argv[0]);
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				exit(1);
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			}
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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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void
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tabify(bool all)
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{
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	char *cp, *dp;
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	int dcol;
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	int ocol;
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	size_t len;
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	ocol = 0;
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	dcol = 0;
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	cp = genbuf;
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	dp = linebuf;
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	len = sizeof 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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				if (len > 1) {
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					*dp++ = '\t';
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					len--;
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				}
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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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				if (len > 1) {
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					*dp++ = ' ';
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					len--;
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				}
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				ocol++;
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			}
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			if (*cp == '\0' || !all) {
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				strlcpy(dp, cp, len);
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				return;
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			}
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			*dp++ = *cp;
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			len--;
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			ocol++;
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			dcol++;
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		}
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		cp++;
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	}
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}