1#include "config.h"
2
3#if HAVE_STRLCAT
4
5int dummy;
6
7#else
8
9/*	$OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $	*/
10
11/*
12 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
13 *
14 * Permission to use, copy, modify, and distribute this software for any
15 * purpose with or without fee is hereby granted, provided that the above
16 * copyright notice and this permission notice appear in all copies.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
19 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
21 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
22 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
23 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
24 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 */
26
27#include <sys/types.h>
28#include <string.h>
29
30/*
31 * Appends src to string dst of size siz (unlike strncat, siz is the
32 * full size of dst, not space left).  At most siz-1 characters
33 * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
34 * Returns strlen(src) + MIN(siz, strlen(initial dst)).
35 * If retval >= siz, truncation occurred.
36 */
37size_t
38strlcat(char *dst, const char *src, size_t siz)
39{
40	char *d = dst;
41	const char *s = src;
42	size_t n = siz;
43	size_t dlen;
44
45	/* Find the end of dst and adjust bytes left but don't go past end */
46	while (n-- != 0 && *d != '\0')
47		d++;
48	dlen = d - dst;
49	n = siz - dlen;
50
51	if (n == 0)
52		return(dlen + strlen(s));
53	while (*s != '\0') {
54		if (n != 1) {
55			*d++ = *s;
56			n--;
57		}
58		s++;
59	}
60	*d = '\0';
61
62	return(dlen + (s - src));	/* count does not include NUL */
63}
64
65#endif
66