1 #ifdef HAVE_CONFIG_H
2 #include "config.h"
3 #endif
4
5 #ifdef HAVE_STRLCAT
6
7 int dummy;
8
9 #else
10
11 /* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
12
13 /*
14 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
15 *
16 * Permission to use, copy, modify, and distribute this software for any
17 * purpose with or without fee is hereby granted, provided that the above
18 * copyright notice and this permission notice appear in all copies.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
21 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
23 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
24 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
25 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
26 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
27 */
28
29 #include <sys/types.h>
30 #include <string.h>
31
32 /*
33 * Appends src to string dst of size siz (unlike strncat, siz is the
34 * full size of dst, not space left). At most siz-1 characters
35 * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
36 * Returns strlen(src) + MIN(siz, strlen(initial dst)).
37 * If retval >= siz, truncation occurred.
38 */
39 size_t
strlcat(char * dst,const char * src,size_t siz)40 strlcat(char *dst, const char *src, size_t siz)
41 {
42 char *d = dst;
43 const char *s = src;
44 size_t n = siz;
45 size_t dlen;
46
47 /* Find the end of dst and adjust bytes left but don't go past end */
48 while (n-- != 0 && *d != '\0')
49 d++;
50 dlen = d - dst;
51 n = siz - dlen;
52
53 if (n == 0)
54 return(dlen + strlen(s));
55 while (*s != '\0') {
56 if (n != 1) {
57 *d++ = *s;
58 n--;
59 }
60 s++;
61 }
62 *d = '\0';
63
64 return(dlen + (s - src)); /* count does not include NUL */
65 }
66
67 #endif
68