libite 2.6.1
strlcat.c
Go to the documentation of this file.
1/* $OpenBSD: strlcat.c,v 1.15 2015/03/02 21:41:08 millert 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
25
26#include <sys/types.h>
27#include <string.h>
28
29#ifndef strlcat
44size_t
45strlcat(char *dst, const char *src, size_t dsize)
46{
47 const char *odst = dst;
48 const char *osrc = src;
49 size_t n = dsize;
50 size_t dlen;
51
52 /* Find the end of dst and adjust bytes left but don't go past end. */
53 while (n-- != 0 && *dst != '\0')
54 dst++;
55 dlen = dst - odst;
56 n = dsize - dlen;
57
58 if (n-- == 0)
59 return(dlen + strlen(src));
60 while (*src != '\0') {
61 if (n != 0) {
62 *dst++ = *src;
63 n--;
64 }
65 src++;
66 }
67 *dst = '\0';
68
69 return(dlen + (src - osrc)); /* count does not include NUL */
70}
71#endif
size_t strlcat(char *dst, const char *src, size_t dsize)
Definition strlcat.c:45