GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/rev/rev.c Lines: 27 35 77.1 %
Date: 2017-11-13 Branches: 21 32 65.6 %

Line Branch Exec Source
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/*	$OpenBSD: rev.c,v 1.13 2016/04/10 17:06:52 martijn Exp $	*/
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/*	$NetBSD: rev.c,v 1.5 1995/09/28 08:49:40 tls Exp $	*/
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/*-
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 * Copyright (c) 1987, 1992, 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 <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <locale.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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int isu8cont(unsigned char);
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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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	char *filename, *p = NULL, *t, *u;
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	FILE *fp;
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	ssize_t len;
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	size_t ps = 0;
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	int ch, rval;
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	setlocale(LC_CTYPE, "");
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	if (pledge("stdio rpath flock cpath wpath", NULL) == -1)
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		err(1, "pledge");
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	while ((ch = getopt(argc, argv, "")) != -1)
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		switch(ch) {
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		default:
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			usage();
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		}
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	argc -= optind;
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	argv += optind;
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	fp = stdin;
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	filename = "stdin";
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	rval = 0;
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	do {
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		if (*argv) {
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			if ((fp = fopen(*argv, "r")) == NULL) {
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				warn("%s", *argv);
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				rval = 1;
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				++argv;
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				continue;
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			}
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			filename = *argv++;
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		}
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		while ((len = getline(&p, &ps, fp)) != -1) {
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			if (p[len - 1] == '\n')
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				--len;
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			for (t = p + len - 1; t >= p; --t) {
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				if (isu8cont(*t))
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					continue;
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				u = t;
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				do {
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					putchar(*u);
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				} while (isu8cont(*(++u)));
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			}
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			putchar('\n');
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		}
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		if (ferror(fp)) {
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			warn("%s", filename);
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			rval = 1;
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		}
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		(void)fclose(fp);
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	} while(*argv);
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	return rval;
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}
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int
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isu8cont(unsigned char c)
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{
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	return MB_CUR_MAX > 1 && (c & (0x80 | 0x40)) == 0x80;
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}
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void
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usage(void)
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{
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	extern char *__progname;
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	(void)fprintf(stderr, "usage: %s [file ...]\n", __progname);
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	exit(1);
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}