/src/tmux/compat/strlcpy.c
Line | Count | Source |
1 | | /* $OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie Exp $ */ |
2 | | |
3 | | /* |
4 | | * Copyright (c) 1998 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 | | #include "compat.h" |
23 | | |
24 | | /* |
25 | | * Copy src to string dst of size siz. At most siz-1 characters |
26 | | * will be copied. Always NUL terminates (unless siz == 0). |
27 | | * Returns strlen(src); if retval >= siz, truncation occurred. |
28 | | */ |
29 | | size_t |
30 | | strlcpy(char *dst, const char *src, size_t siz) |
31 | 2.86k | { |
32 | 2.86k | char *d = dst; |
33 | 2.86k | const char *s = src; |
34 | 2.86k | size_t n = siz; |
35 | | |
36 | | /* Copy as many bytes as will fit */ |
37 | 2.86k | if (n != 0 && --n != 0) { |
38 | 3.60k | do { |
39 | 3.60k | if ((*d++ = *s++) == 0) |
40 | 2.82k | break; |
41 | 3.60k | } while (--n != 0); |
42 | 2.86k | } |
43 | | |
44 | | /* Not enough room in dst, add NUL and traverse rest of src */ |
45 | 2.86k | if (n == 0) { |
46 | 34 | if (siz != 0) |
47 | 34 | *d = '\0'; /* NUL-terminate dst */ |
48 | 34 | while (*s++) |
49 | 0 | ; |
50 | 34 | } |
51 | | |
52 | 2.86k | return(s - src - 1); /* count does not include NUL */ |
53 | 2.86k | } |