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7216c39 @kfebert Imported Upstream version 1.5
kfebert authored
1 /* $Id: strlcpy.c 2553 2011-07-09 09:42:33Z tcunha $ */
8fade26 Imported Upstream version 1.1
Karl Ferdinand Ebert authored
2 /* $OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie Exp $ */
3
4 /*
5 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #include <sys/types.h>
21 #include <string.h>
22
23 #include "tmux.h"
24
25 /*
26 * Copy src to string dst of size siz. At most siz-1 characters
27 * will be copied. Always NUL terminates (unless siz == 0).
28 * Returns strlen(src); if retval >= siz, truncation occurred.
29 */
30 size_t
31 strlcpy(char *dst, const char *src, size_t siz)
32 {
33 char *d = dst;
34 const char *s = src;
35 size_t n = siz;
36
37 /* Copy as many bytes as will fit */
38 if (n != 0 && --n != 0) {
39 do {
40 if ((*d++ = *s++) == 0)
41 break;
42 } while (--n != 0);
43 }
44
45 /* Not enough room in dst, add NUL and traverse rest of src */
46 if (n == 0) {
47 if (siz != 0)
48 *d = '\0'; /* NUL-terminate dst */
49 while (*s++)
50 ;
51 }
52
53 return(s - src - 1); /* count does not include NUL */
54 }
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