Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/colrm/colrm.c	Lines:	54	64	84.4 %
Date:	2017-11-13	Branches:	77	102	75.5 %


/*	$OpenBSD: colrm.c,v 1.13 2016/10/27 12:53:54 schwarze Exp $	*/
/*	$NetBSD: colrm.c,v 1.4 1995/09/02 05:51:37 jtc Exp $	*/

/*-
 * Copyright (c) 1991, 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. 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.
 */

#include <sys/types.h>

#include <err.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>

#define	TAB	8

void usage(void);

int
main(int argc, char *argv[])
{
	char	 *line, *p;
	ssize_t	  linesz;
	wchar_t	  wc;
	u_long	  column, newcol, start, stop;
	int	  ch, len, width;

	setlocale(LC_CTYPE, "");

	if (pledge("stdio flock rpath cpath wpath", NULL) == -1)
		err(1, "pledge");

	while ((ch = getopt(argc, argv, "")) != -1)
		switch(ch) {
		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

	start = stop = 0;
	switch(argc) {
	case 2:
		stop = strtol(argv[1], &p, 10);
		if (stop <= 0 || *p)
			errx(1, "illegal column -- %s", argv[1]);
		/* FALLTHROUGH */
	case 1:
		start = strtol(argv[0], &p, 10);
		if (start <= 0 || *p)
			errx(1, "illegal column -- %s", argv[0]);
		break;
	case 0:
		break;
	default:
		usage();
	}

	if (stop && start > stop)
		err(1, "illegal start and stop columns");

	line = NULL;
	while (getline(&line, &linesz, stdin) != -1) {
		column = 0;
		width = 0;
		for (p = line; *p != '\0'; p += len) {
			len = 1;
			switch (*p) {
			case '\n':
				putchar('\n');
				continue;
			case '\b':
				/*
				 * Pass it through if the previous character
				 * was in scope, still represented by the
				 * current value of "column".
				 * Allow an optional second backspace
				 * after a double-width character.
				 */
				if (start == 0 || column < start ||
				    (stop > 0 &&
				     column > stop + (width > 1))) {
					putchar('\b');
					if (width > 1 && p[1] == '\b')
						putchar('\b');
				}
				if (width > 1 && p[1] == '\b')
					p++;
				column -= width;
				continue;
			case '\t':
				newcol = (column + TAB) & ~(TAB - 1);
				if (start == 0 || newcol < start) {
					putchar('\t');
					column = newcol;
				} else
					/*
					 * Expand tabs that intersect or
					 * follow deleted columns.
					 */
					while (column < newcol)
						if (++column < start ||
						    (stop > 0 &&
						     column > stop))
				 			putchar(' ');
				continue;
			default:
				break;
			}

			/*
			 * Handle the three cases of invalid bytes,
			 * non-printable, and printable characters.
			 */

			if ((len = mbtowc(&wc, p, MB_CUR_MAX)) == -1) {
				(void)mbtowc(NULL, NULL, MB_CUR_MAX);
				len = 1;
				width = 1;
			} else if ((width = wcwidth(wc)) == -1)
				width = 1;

			/*
			 * If the character completely fits before or
			 * after the cut, keep it; otherwise, skip it.
			 */

			if ((start == 0 || column + width < start ||
			    (stop > 0 && column + (width > 0) > stop)))
			    	fwrite(p, 1, len, stdout);

			/*
			 * If the cut cuts the character in half
			 * and no backspace follows,
			 * print a blank for correct columnation.
			 */

			else if (width > 1 && p[len] != '\b' &&
			    (start == 0 || column + 1 < start ||
			    (stop > 0 && column + width > stop)))
				putchar(' ');

			column += width;
		}
	}
	if (ferror(stdin))
		err(1, "stdin");
	if (ferror(stdout))
		err(1, "stdout");
	return 0;
}

void
usage(void)
{
	(void)fprintf(stderr, "usage: colrm [start [stop]]\n");
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: colrm.c,v 1.13 2016/10/27 12:53:54 schwarze Exp $ */
2			/* $NetBSD: colrm.c,v 1.4 1995/09/02 05:51:37 jtc Exp $ */
3
4			/*-
5			* Copyright (c) 1991, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			#include <sys/types.h>
34
35			#include <err.h>
36			#include <errno.h>
37			#include <limits.h>
38			#include <locale.h>
39			#include <stdio.h>
40			#include <stdlib.h>
41			#include <string.h>
42			#include <unistd.h>
43			#include <wchar.h>
44
45			#define TAB 8
46
47			void usage(void);
48
49			int
50			main(int argc, char *argv[])
51			{
52		800	char line, p;
53		400	ssize_t linesz;
54		400	wchar_t wc;
55			u_long column, newcol, start, stop;
56			int ch, len, width;
57
58		400	setlocale(LC_CTYPE, "");
59
60	✗✓	400	if (pledge("stdio flock rpath cpath wpath", NULL) == -1)
61			err(1, "pledge");
62
63	✗✓	800	while ((ch = getopt(argc, argv, "")) != -1)
64			switch(ch) {
65			case '?':
66			default:
67			usage();
68			}
69		1060	argc -= optind;
70		1060	argv += optind;
71
72			start = stop = 0;
73	✓✓✗✓	1060	switch(argc) {
74			case 2:
75		300	stop = strtol(argv[1], &p, 10);
76	✓✗✗✓	600	if (stop <= 0 \|\| *p)
77			errx(1, "illegal column -- %s", argv[1]);
78			/* FALLTHROUGH */
79			case 1:
80		360	start = strtol(argv[0], &p, 10);
81	✓✗✗✓	720	if (start <= 0 \|\| *p)
82			errx(1, "illegal column -- %s", argv[0]);
83			break;
84			case 0:
85			break;
86			default:
87			usage();
88			}
89
90	✓✓✗✓	700	if (stop && start > stop)
91			err(1, "illegal start and stop columns");
92
93		400	line = NULL;
94	✓✓	1580	while (getline(&line, &linesz, stdin) != -1) {
95			column = 0;
96			width = 0;
97	✓✓	5120	for (p = line; *p != '\0'; p += len) {
98			len = 1;
99	✓✓✓✓	2170	switch (*p) {
100			case '\n':
101	✓✗	20	putchar('\n');
102			continue;
103			case '\b':
104			/*
105			* Pass it through if the previous character
106			* was in scope, still represented by the
107			* current value of "column".
108			* Allow an optional second backspace
109			* after a double-width character.
110			*/
111	✓✓✓✓ ✓✓	555	if (start == 0 \|\| column < start \|\|
112	✓✗	155	(stop > 0 &&
113		155	column > stop + (width > 1))) {
114	✓✗	280	putchar('\b');
115	✓✓✓✓	160	if (width > 1 && p[1] == '\b')
116	✓✗	20	putchar('\b');
117			}
118	✓✓✓✓	255	if (width > 1 && p[1] == '\b')
119		25	p++;
120		205	column -= width;
121		205	continue;
122			case '\t':
123		70	newcol = (column + TAB) & ~(TAB - 1);
124	✓✓✓✓	130	if (start == 0 \|\| newcol < start) {
125	✓✗	60	putchar('\t');
126			column = newcol;
127		30	} else
128			/*
129			* Expand tabs that intersect or
130			* follow deleted columns.
131			*/
132	✓✓	540	while (column < newcol)
133	✓✓✓✓	350	if (++column < start \|\|
134	✓✓	130	(stop > 0 &&
135		120	column > stop))
136	✓✗	260	putchar(' ');
137			continue;
138			default:
139			break;
140			}
141
142			/*
143			* Handle the three cases of invalid bytes,
144			* non-printable, and printable characters.
145			*/
146
147	✓✓	1885	if ((len = mbtowc(&wc, p, MB_CUR_MAX)) == -1) {
148		15	(void)mbtowc(NULL, NULL, MB_CUR_MAX);
149			len = 1;
150			width = 1;
151		1885	} else if ((width = wcwidth(wc)) == -1)
152			width = 1;
153
154			/*
155			* If the character completely fits before or
156			* after the cut, keep it; otherwise, skip it.
157			*/
158
159	✓✓✓✓ ✓✓	4840	if ((start == 0 \|\| column + width < start \|\|
160	✓✓	2370	(stop > 0 && column + (width > 0) > stop)))
161		1410	fwrite(p, 1, len, stdout);
162
163			/*
164			* If the cut cuts the character in half
165			* and no backspace follows,
166			* print a blank for correct columnation.
167			*/
168
169	✓✓✓✓ ✓✓	530	else if (width > 1 && p[len] != '\b' &&
170	✓✗✓✓	30	(start == 0 \|\| column + 1 < start \|\|
171	✓✗	20	(stop > 0 && column + width > stop)))
172	✓✗	20	putchar(' ');
173
174		1885	column += width;
175		1885	}
176			}
177	✓✗✗✓ ✗✗	800	if (ferror(stdin))
178			err(1, "stdin");
179	✓✗✗✓ ✗✗	800	if (ferror(stdout))
180			err(1, "stdout");
181		400	return 0;
182		400	}
183
184			void
185			usage(void)
186			{
187			(void)fprintf(stderr, "usage: colrm [start [stop]]\n");
188			exit(1);
189			}