Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/string/strlcat.c	Lines:	14	15	93.3 %
Date:	2017-11-07	Branches:	7	10	70.0 %


/*	$OpenBSD: strlcat.c,v 1.18 2016/10/16 17:37:39 dtucker Exp $	*/

/*
 * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <string.h>

/*
 * Appends src to string dst of size dsize (unlike strncat, dsize is the
 * full size of dst, not space left).  At most dsize-1 characters
 * will be copied.  Always NUL terminates (unless dsize <= strlen(dst)).
 * Returns strlen(src) + MIN(dsize, strlen(initial dst)).
 * If retval >= dsize, truncation occurred.
 */
size_t
strlcat(char *dst, const char *src, size_t dsize)
{
	const char *odst = dst;
	const char *osrc = src;
	size_t n = dsize;
	size_t dlen;

	/* Find the end of dst and adjust bytes left but don't go past end. */
	while (n-- != 0 && *dst != '\0')
		dst++;
	dlen = dst - odst;
	n = dsize - dlen;

	if (n-- == 0)
		return(dlen + strlen(src));
	while (*src != '\0') {
		if (n != 0) {
			*dst++ = *src;
			n--;
		}
		src++;
	}
	*dst = '\0';

	return(dlen + (src - osrc));	/* count does not include NUL */
}
DEF_WEAK(strlcat);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: strlcat.c,v 1.18 2016/10/16 17:37:39 dtucker Exp $ */
2
3			/*
4			* Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/types.h>
20			#include <string.h>
21
22			/*
23			* Appends src to string dst of size dsize (unlike strncat, dsize is the
24			* full size of dst, not space left). At most dsize-1 characters
25			* will be copied. Always NUL terminates (unless dsize <= strlen(dst)).
26			* Returns strlen(src) + MIN(dsize, strlen(initial dst)).
27			* If retval >= dsize, truncation occurred.
28			*/
29			size_t
30			strlcat(char dst, const char src, size_t dsize)
31			{
32			const char *odst = dst;
33			const char *osrc = src;
34			size_t n = dsize;
35			size_t dlen;
36
37			/* Find the end of dst and adjust bytes left but don't go past end. */
38	✓✗✓✓	47737	while (n-- != 0 && *dst != '\0')
39		11133	dst++;
40		641	dlen = dst - odst;
41		641	n = dsize - dlen;
42
43	✗✓	641	if (n-- == 0)
44			return(dlen + strlen(src));
45	✓✓	7581	while (*src != '\0') {
46	✓✗	3470	if (n != 0) {
47		3470	dst++ = src;
48		3470	n--;
49		3470	}
50		3470	src++;
51			}
52		641	*dst = '\0';
53
54		641	return(dlen + (src - osrc)); /* count does not include NUL */
55		641	}
56			DEF_WEAK(strlcat);